CA1205786A - Method of making multiple reclosable bag material and the resulting material - Google Patents
Method of making multiple reclosable bag material and the resulting materialInfo
- Publication number
- CA1205786A CA1205786A CA000416523A CA416523A CA1205786A CA 1205786 A CA1205786 A CA 1205786A CA 000416523 A CA000416523 A CA 000416523A CA 416523 A CA416523 A CA 416523A CA 1205786 A CA1205786 A CA 1205786A
- Authority
- CA
- Canada
- Prior art keywords
- panel portions
- wall panel
- bag
- fastener assembly
- fastener
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/61—Joining from or joining on the inside
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
- B29C65/7858—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus characterised by the feeding movement of the parts to be joined
- B29C65/7888—Means for handling of moving sheets or webs
- B29C65/7894—Means for handling of moving sheets or webs of continuously moving sheets or webs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2793/00—Shaping techniques involving a cutting or machining operation
- B29C2793/0081—Shaping techniques involving a cutting or machining operation before shaping
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/74—Auxiliary operations
- B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
- B31B70/813—Applying closures
- B31B70/8131—Making bags having interengaging closure elements
- B31B70/8132—Applying the closure elements in the machine direction
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
- Y10T156/1007—Running or continuous length work
- Y10T156/1015—Folding
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
- Y10T156/1062—Prior to assembly
- Y10T156/1067—Continuous longitudinal slitting
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1334—Nonself-supporting tubular film or bag [e.g., pouch, envelope, packet, etc.]
- Y10T428/1345—Single layer [continuous layer]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/19—Sheets or webs edge spliced or joined
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24008—Structurally defined web or sheet [e.g., overall dimension, etc.] including fastener for attaching to external surface
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249923—Including interlaminar mechanical fastener
Abstract
ABSTRACT
A method of making multiple reclosable bag mater-ial, which comprises advancing from a supply source bag wall film in continuous strip form and providing confront-ing colinear wall panel portions with surfaces facing to-ward one another, feeding separable fastener assembly in continuous strip form from a supply source into corunning relation between the wall panel portions, and permanently securing to the wall panel portion surfaces oppositely facing base surfaces of the fastener assembly. The mater-ial thus formed is adapted to be split longitudinally into a plurality of bag material strip sections adapted to be sealed across at spaced intervals into bag units.
A method of making multiple reclosable bag mater-ial, which comprises advancing from a supply source bag wall film in continuous strip form and providing confront-ing colinear wall panel portions with surfaces facing to-ward one another, feeding separable fastener assembly in continuous strip form from a supply source into corunning relation between the wall panel portions, and permanently securing to the wall panel portion surfaces oppositely facing base surfaces of the fastener assembly. The mater-ial thus formed is adapted to be split longitudinally into a plurality of bag material strip sections adapted to be sealed across at spaced intervals into bag units.
Description
~¢J 571~
SPECIFICATION
_ This invention relates to improvements in methods of forming makerial which is especially adapted for making multiple bags.
More particularly~ the present invention concerns a new and improved method for joining bag wall film and separable fastener strip means in a simple manner for high speed production of improved bags.
Heretofore, the practice in preparing multiple plastic bags with reclosable fasteners thereon has required that the profiled fastener strips have upper base web sur-faces attached to surfaces of at least one of the confront-ing wall panel portions of the bag material, that is, bag wall surface areas of the completed bags. By way of example, U.S. Patent 3,948,705 is referred to. As dis-closed in that patent, flattened tubular material is cut open along a centrally longi~udinal area of one of ~he confronting bag wall portions and the separable fastener assembly, including separable fastener closures for both of the multiple bag sections of the material, is joined with the front bag wall panel portions by lapping the lateral flanges on one side of the fastener assPmbly with the surface areas along the cut in the one panel. The other side of the fastener assembly has a lower base web surface laid against the inside of the other wall panel.
Then, the fastener assembly is separated by an anvil and the separated parts of the assembly are heat welded.
In the patented method, the anvil between the wall panel portions and the parts of ~he fastener assembly to be secured to said portions is essential to the method. Further, where lt ;.s desired to have the finished bags equipped with pull flanges at the open end, only one of the pull flanges may comprise a laminate of a flange of the fast-ener strip and a marginal portion of the contiguous sidewall, while the opposlte fastener element which is attached to the face of the associated wall panel cannot have the desirable laminar pull flange, because the margin of the associated front wall panel that is at~ached to the fastener element mus-t stop short of the proEiles thereof to avoid interference with the mating of said profiles ; with the profiles of the fastener element on the opposite wall panel.
Othe~ prior U.S. patents which are exemplary of forming multiple reclosable bag material are Nos.
3,219,084; 3,608,439; and 3,679,511, all of which are also characterized by the necessity for attaching flanges of the fastener assemblies to the outside marginal surfaces of one of the wall panel portions.
An important object of the present inven~ion is to provide a new and improved method of making mul-tiple reclosable bag material, and the resulting material, wherein separable fastener assembly means are assembled to ; confronting surfaces of the bag wall film wall panel portions, and permanent securement is adapted to be effected without separating the fastener asse~bly.
Pursuan~ to the present invention, there is provided a method of making multiple reclosable bag material, comprising advancing from a supply source bag wall film as a continuous ribbon and providing confronting colinear wall panel portions with surfaces fac.ing toward one another and oE a width sufficient to provide two continuous bag strip sections, eeding a continuous length of double separable fastenex assembly fro]m a supply source
SPECIFICATION
_ This invention relates to improvements in methods of forming makerial which is especially adapted for making multiple bags.
More particularly~ the present invention concerns a new and improved method for joining bag wall film and separable fastener strip means in a simple manner for high speed production of improved bags.
Heretofore, the practice in preparing multiple plastic bags with reclosable fasteners thereon has required that the profiled fastener strips have upper base web sur-faces attached to surfaces of at least one of the confront-ing wall panel portions of the bag material, that is, bag wall surface areas of the completed bags. By way of example, U.S. Patent 3,948,705 is referred to. As dis-closed in that patent, flattened tubular material is cut open along a centrally longi~udinal area of one of ~he confronting bag wall portions and the separable fastener assembly, including separable fastener closures for both of the multiple bag sections of the material, is joined with the front bag wall panel portions by lapping the lateral flanges on one side of the fastener assPmbly with the surface areas along the cut in the one panel. The other side of the fastener assembly has a lower base web surface laid against the inside of the other wall panel.
Then, the fastener assembly is separated by an anvil and the separated parts of the assembly are heat welded.
In the patented method, the anvil between the wall panel portions and the parts of ~he fastener assembly to be secured to said portions is essential to the method. Further, where lt ;.s desired to have the finished bags equipped with pull flanges at the open end, only one of the pull flanges may comprise a laminate of a flange of the fast-ener strip and a marginal portion of the contiguous sidewall, while the opposlte fastener element which is attached to the face of the associated wall panel cannot have the desirable laminar pull flange, because the margin of the associated front wall panel that is at~ached to the fastener element mus-t stop short of the proEiles thereof to avoid interference with the mating of said profiles ; with the profiles of the fastener element on the opposite wall panel.
Othe~ prior U.S. patents which are exemplary of forming multiple reclosable bag material are Nos.
3,219,084; 3,608,439; and 3,679,511, all of which are also characterized by the necessity for attaching flanges of the fastener assemblies to the outside marginal surfaces of one of the wall panel portions.
An important object of the present inven~ion is to provide a new and improved method of making mul-tiple reclosable bag material, and the resulting material, wherein separable fastener assembly means are assembled to ; confronting surfaces of the bag wall film wall panel portions, and permanent securement is adapted to be effected without separating the fastener asse~bly.
Pursuan~ to the present invention, there is provided a method of making multiple reclosable bag material, comprising advancing from a supply source bag wall film as a continuous ribbon and providing confronting colinear wall panel portions with surfaces fac.ing toward one another and oE a width sufficient to provide two continuous bag strip sections, eeding a continuous length of double separable fastenex assembly fro]m a supply source
- 2 -~57.~
into corunniny relation between said wall panel portions and intermediate and spaced from the longitudinal sides of said wa]1 panel portions, and wherein said fastener assembly has two coextensive webs which carry along con-fronting opposite longitudinal margins respective comple-mentary resiliently flexible fastener profile sets which are separably interlocked and with substantial width areas of the webs intervening between the profile carrying mar-gins on each of the webs and having respective oppositely facing base surfaces, placing said web base surfaces respectively in laminar relation to said facing surfaces on superjacent parts of the bag wall film panel portionsr and permanently securing into a laminate each of said superjacent parts oE said wall panel portions and only intermediate areas of the webs and leaving the profile carrying marginal portions of each of the webs free from the panel portion surfaces~ so that by longitudinally separating said laminates between and spaced from said fastener profile sets into separate bag making strips, ~; 20 each strip will have thereon one of said fastener profi]e sets and each strip will be provided with multilayer pull flanges formed from said laminates and with both of the fastener carrying margins free from the panel portion surfaces on both wall panel portions of each strip.
~ 25 The present invention also provides a multiple ; reclosable bag material resulting from the foregoing ; method.
The present invention further provides a method of making multiple reclosable bag material, comprising advancing from a supply source bag wall film as a con-~inuous ribbon and providing confronting colinear wall panel portions with surfaces facing toward one another and of a width sufficient to provide two continuous bag strip ~57~
sections, feeding a continuous length of double separable fastener assembly from a supply source into ccrunning rel.ation betw~en said wall panel portions and intermediate and spaced from the longitudinal sides of side wall panel portionsr and wherein said fastener assembly has two spaced coextensive webs having along confronting opposite longitudinal margins respective complementary resiliently flexible fastener profile sets which are separably inter-locked and with substantial width areas of the webs inter-vening between the profiles on each of the webs and the webs having respective oppositely facing base surfaces, permanently securing each of said web areas into a laminate with the respective subjacent of said wall panel portions, and slitting said laminates longitudinally along respective substantially offset lines and thereby providing two bag making strips having differential length pull flanges along said fastener sets.
The present invention in addition provides a method of making multiple reclosable bag material, com-prising advancing from a supply source bag wall film in the form of a pair of colinear separate films and therehy providing wall panel portions with surfaces facing toward one another, feeding a continuous length of double separ-able fastener assembly from a supply source into corunning relation between and intermediate the longitudinal edges of said panel portions, permanently securing to said wall panel portions surfaces oppositely facing base surfaces on said fastener assembly, and joining together the opposite edges of the confronting wall panel portions, so that when the material is longitudinally separated into a pair of bag making strips, the strips can be separated into top opening bag sections having separable Eastener~; at their top openings~
B - ,B -;~2~7~
The present invention also provides a method of making m~lltiple recl.osable bag material, comprising advancing from a supply source bag wall film in the form of a collapsed tubular plastic extrusion wherein the collapsed extrusion provides colinear wall panel portions with surfaces facing toward one another, slitting one of said wall panel portions along a longitudinal line inter mediate the opposite edges of said one panel portion, separating margins of said one panel portion along said slit to provide a longitudinal opening, feeding a con-tinuous length of double separable fastener assembly from a supply source through said longitudinal opening into corunning relation between said wall panel portions, returning said one panel portion along said slit into closed coplanar relation and with the edges along said slit in edge-to-edge relation, and permanently securing to said wall panel portion surfaces oppositely facing base surfaces of said fastener assembly.
The present invention also provides a method of mak.ing multiple reclosable bag material, comprising ad-vancing from a supply source bag wall film in continuous ribbon of collapsed tubular film extrusion having opposite edges and wherein the collapsed tubular extrusion provides confronting colinear wall panel portions with surfaces facing toward one another, slitting one edge of the collapsed extrusion to provide an entrance into the collapsed extrusion, feeding a continuous length of double separable fastener assembly from a supply source laterally through said entrance and then diverting the continuous length into corunning lonyitudinal relation between and in intermediate position between said wall panel po:r-tions, permanently securing to said wall panel portion surfaces oppo.sitely facing base surfaces of said fastener assembly, ~2~
and sealing said slit side edge closed downs-tream from said divertlng of said fastener assembly.
Other features and advantages of the invention will be readily apparent from the following description of representative embodiments thereof, taken in conjunction with the accompanying drawings although variations and modifications may be effected without departing from the spirit and scope of the no~el concepts embodied in the di,sclosure and in which:
FIG. 1 is a fragmentary enlarged transverse sectional detail view showing multiple reclosable bag material produced according to the method of the present invention;
FIG. 2 is a similar sectional view showing a modified form of the fastener profiles;
FIG. 3 is a schematic illustration of one , preferred mode of practicing the present invention;
FIG. 4 is a schematic illustration of another mode of practicing the invention;
FIG. 5 is a schematic ilustration of a further mode of practicing the present invention;
FIG. 6 illustrates bag material produced according to the present method adapted fcr use in producing bottom open bags; and ~; FIG. 7 shows a modified arrangement for bottom ; open bags from multiple reclosable bag material produced according to the present invention.
Referring to FIG. 1, multiple reclosable bag ` material 10 produced according to khe method o~ the pre-sent invention comprises bag wall film, preEerably of a suikable extruded plastic material, providing colinear wal:L
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panel portions 11 and 12 with respective surfaces 13 facing toward one another.
Separable fastener assembly means 14 colinear with and located between the panel por~ions 11 and 12 comprises extruded plastic, complementary resiliently flexible fastener profile sections, one of which has an upper base web 15 and the other of which has a lower base web 17. These base webs 15 and 17 are of substantial width and have along each opposite edge a separable zipper profile structure, comprising profile structures 18 on the web 15 and complementary profile structures 19 on the web 17. The profile structures 18 and 19 in this in-stance are of the well known complementary plural rib and groo~e type.
Oppositely facing base surfaces 20 of the fastener strips are permanently secured, in the present instance, along the webs 15 and 17 to the panel portion surfaces 13 in any suitable fashion, such as by heat welding as in-dicated at 21 and which effects fusion of the laminated sur~aces. In this instance, the base surfaces 20 along the profile heads or sections 18 and 19 are ~llowed to re-main free from attachment to the wall surfaces 13 so that the wall pan~l~ 11 and 12 may expand relative to the joined profiles without opening the fastener.
Separation of the multiple reclosable bag material in~o two separate bag forming strip sections is adapted to be effected along a longitudinal line 22 midway between the opposi~e edges of the base webs 15 and 17. The reclosable bag material may also be adapted to be separated at two locations with the upper base web being cut closer to one profile as at 22a and with the lower web being cut: closer ~s~
to the other profile as at 22b, thereby resulting in pull flanges of different lengths on the finished bags. This provides respective multi-thickness bag mouth opening pull flanges 23 comprising the separated portions of the webs 15 and 17 and the maxgins of the wall panels 11 and 12 to which they are laminated. By making possible a heavier pull flange, it becomes easier to separate the interlocking profiles of the finished bag. It will be understood, of course, that the separated multiple rec~osable bag material strip sections wili be eventually divided transfersely in-to separate bag units.
In the modified multiple reclosable bag material 24, as shown in FIG. 2, confronting colinear wall panel portions 25 and 27 have respectiv~ surfaces 28 facing toward one another and provided therebe~ween with colinear separable fastener assembly means 29 of the type wherein cc~xt~ ~; v e A respective upper and lowerlbase webs 30 and 31 have their oppositely facing base surfaces permanently secured as by means of heat fusion welding 32 to the wall panel portion surfaces 28. In this instance, the fastener strips are provided with complementary separably interloc~Ing mak~s profiles 33 on the upper base web 30 and female profiles 34 on the lower base web 31. Alterna~ely, each web could carry a male and female profile that interlocks with the complementary profiles of the other base web. By separat-; ing the multiple reclosable bag material 24 along a long-itudinal line 35 midway of ~he webs 31, the bag strips in-to which the material 24 is divided will have respective multi-thickness pull flanges 37 comprising the fused to-gether segments of the webs 30 and 31 and the margins of the panels 25 and 27.
~2~ 8~i Both embodiments of the multiple reclosable bag material, 10 and 24, are adapted to be made according to the method exemplified in ~IG. 3. To t:his end, bag wall film 11, or 25, is ad~anced in continuous strip form from a supply source such as a xoll 38, and bag wall film 12 or 27 is advanced in continuous strip form from a supply source such as a roll 39, thereby providing cvnfronting ; colinear wall panel portions with surfaces 13 or 28, fac-ing toward one another. Separable fastener assembly means 14 or 29, in continuous strip form is fed from a supply source such as a roll 40 into corunning relation bet~een the panel portions 11 or 25 and 12 or 27. As will be observed, the continuous, coru~ning relation between the panel portions and the fastener assembly means is along a ; 15 common longitudinal axis, in this instance, centered be-tween the wall p~nel portions 11 or 25 and 12 or 27.
Permanent securement of the confronting panel por-tion suxfaces 13 or 28, to the oppositely facing base sur-: ~ faces of the fastener assembly means 14 or 29, is effected by means o heat welding heads 41 and 42 disposed on re-. spectively opposite sides, which, as shown, are the topand bottom sides of the bag wall film and separable fast-ener assembly means sandwich. This effec~s welding of the laminar surfaces:of the wall film and fastener assembly to attain either of the permanent fused securement as demon-strated in FIGS. 1 and 2.
Although the outer edge margins of the wall panel portions 11 or 25 and 12 or 27 may be left open or bot~om bag filling of the subseguently separated bag seation strips, tha wall panel portion margins may, as shown, ba heat fusion sealed as by means of a seal head assembly 43 5~
at each of the opposite margins~ Thereafter, by severing the assembly along -the longitudinal line 22 or 35 into two bag section strips, the ultimate bag unitc; will be adapted to be filled from the top by opening the respective separable fasteners, and then reclosing the Easteners to re~ain the bay contents.
As shown in FIG. 4, the method of making multiple reclosable bag material 44 may comprise advancing from a supply source such as a roll 45 bag plast;c wall film 47 which has been fabricated by extrusion in tubular form and collapsed for convenient winding into the roll 45, from which the film is advanced as a continuous strip which is : provided with confronting colinear wall panel portions 48 and 49 joined along opposite margins by closed juncture bends 50. For feeding separable fastener assembly means 51 in continuous strip form from a supply source such as a roll 52 into corunning relation between the wall panel portions 48 and 49, one of the panel portions, herein the panel portion 48, is slit open along a lonc3i~udinal line preferably midway of the width of the panel portions. For this purpose, a slitting edge device 53 is mounted on a suitable supporting frame 54 and with the edge of the slitter facing upstream relative to the direction of advance of the film 47. In addition to slitting the web wall panel portion 48, the device 53 functions as a spreader so that margins 55 of the panel portion 43 along the slit are spread apart to provide a longitudinal gap 57 ; of sufficient width to receive the fastener assembly 51 therethrough ~o be sandwiched between the wall panel portions 48 and 49. ~fter he corunning fastener assembly means 51 has entered through the slit, the margins 55 are closed over into edge-to-edge relationt as dep:icted, the fastener assembly Sl as by means of a closing guide device 58. EIeat sealing or welding of the i.nwardly facing sur-faces oE the margins 55, and the inner surface of the wall panel 49, to the oppositely facing upper base surfaces of the fastener assembly means 51 may be effected by heat sealing heat means 59~ Thereafter, the permanently secured wall panel and fastener assembly means may be longitudinally divided along a line 6Q, which may be coincident with the joint between the edges of the margins 55, into two bay strip sections to be ultimately divided into top filling bag units.
Referring to FIG. 5, another arrangement is shown for making multiple reclosable bag material 61 utilizing bag wall film 62 in continuous strip form comprising col-lapsed tubularly extruded plastic Eilm supplied from asuitable source such as a roLl 63. In order to assemble separable fastener assembly means 64 derived from a suit-able source such as a roll 65 into sandwiched position between the colinear wall panel portions 67 and 68 having inner surfaces facing toward one another, slitting and spreader means 69 has a sli~ting edge 70 facing upstream and located to slit open a juncture 71 along one edge of the collapsed film 62 and then spread margins 72 along the slit so that the fastener assembly means 64 can be fed into position between the wall panels 67 and 68. Such feeding is adapted to be effected by train;ng the fastener assembly means strip 64 about a guide ro:Ller 73 into the slit between the margins 72 toward the longitudinal eenter between the wall panels 67 and 68 where a turn bar or roller device 74 turns the fatener strip asse~bly 64 lnto corunning relation longitudinally between the panels 67 and 68 and between longitudinal guides 75 which may be supported in 7~
assembly with the turn bar device 74. Permanent secure-ment of the panel 67 and 68 to the oppositely fasing upper and lower base surfaces of the fastener assembly strip means 64 is adapted to be effected as by means of a heat welding head 77. Downstream from the point where the fastener strip means 64 enters between the panels 67 and 68, a margin closure guide 79 closes the margins 72 to-gether and means such as heat sealing head structure 80 may secure the margins 72 into a clo~ed seam 81.
While all film and fastener material is indicated as coming f~om rolls, it is also possible that such com-ponents could come directly from one or more extrusion sources.
In all forms of the invention as shown in FIGS. 3, 4 and 5r it will be understood that suitable supporting, feeding, controlling and guiding means for the components, and then the assembly of ~he reclosable bag material will be provided as is generally accepted practice.
Where both of the reclosable bag material sections are to provide bottom open bags to facilitate filling the bags from the bottom while the separable closure means re-mains closed, multiple reclosable bag material 82 (FIG. 6) may be provided wherein both opposite edges of the assembly are open. This condition may be arrived at by forming the bag material according to the method as described in con-nection with FIG. 3, but omitting the marginal sealing step.
Also, instead of having the edges of the bag wall film panel portions coextensive as in FIG. 6, the multiple re-closable hag material 82' as shown in FIG. 7 may have one of the panel portions 83' narrower than the opposite panel portion 84'. By having the panel portions 83' and 84' _g_ I
~5~
centered opposite one another, the margins o the panel portion 84' are offset laterally rela~ive to the margins of the other panel portion 83'. In other respects, the bag material 82' may be th~ same as the! bag material 82 in FIG. 6. On the other hand, this result may be attained by slitting both edges of a collapsed tube form of the film material ~y slitting both edges instead of only one edge as shown in FIG. 5, and then omi~ting sealing of the margins along the edge slits. In other respects, the bag material 82 may be substantially the same as in any of the described assemblies, that is, wall panel portions 83 and 84 will have separable fastener assembly means 85 longitud-inally centrally permanently secured ~herebetween and then sevsred along a longitudinal line 87, between the spaced parallel separable fastener profile assemblies, into two bag strip sections adapted to be subdivided into bag units.
: In all forms of the bag material produced according to the present invention, the margins of the wall panel por-tions laminated to the base webs of the fastener assemblies provide for multi-thickness pull flanges at the mouth ends of bags to be formed from the material, to facilitate digital manipulation for opening the separable closures.
The bays are reclosable by pressing the fastener profiles together~
. It will be understood that variations and modiica-tions may be effected without departing from the spirit and scope of the novel concepts of this invention.
into corunniny relation between said wall panel portions and intermediate and spaced from the longitudinal sides of said wa]1 panel portions, and wherein said fastener assembly has two coextensive webs which carry along con-fronting opposite longitudinal margins respective comple-mentary resiliently flexible fastener profile sets which are separably interlocked and with substantial width areas of the webs intervening between the profile carrying mar-gins on each of the webs and having respective oppositely facing base surfaces, placing said web base surfaces respectively in laminar relation to said facing surfaces on superjacent parts of the bag wall film panel portionsr and permanently securing into a laminate each of said superjacent parts oE said wall panel portions and only intermediate areas of the webs and leaving the profile carrying marginal portions of each of the webs free from the panel portion surfaces~ so that by longitudinally separating said laminates between and spaced from said fastener profile sets into separate bag making strips, ~; 20 each strip will have thereon one of said fastener profi]e sets and each strip will be provided with multilayer pull flanges formed from said laminates and with both of the fastener carrying margins free from the panel portion surfaces on both wall panel portions of each strip.
~ 25 The present invention also provides a multiple ; reclosable bag material resulting from the foregoing ; method.
The present invention further provides a method of making multiple reclosable bag material, comprising advancing from a supply source bag wall film as a con-~inuous ribbon and providing confronting colinear wall panel portions with surfaces facing toward one another and of a width sufficient to provide two continuous bag strip ~57~
sections, feeding a continuous length of double separable fastener assembly from a supply source into ccrunning rel.ation betw~en said wall panel portions and intermediate and spaced from the longitudinal sides of side wall panel portionsr and wherein said fastener assembly has two spaced coextensive webs having along confronting opposite longitudinal margins respective complementary resiliently flexible fastener profile sets which are separably inter-locked and with substantial width areas of the webs inter-vening between the profiles on each of the webs and the webs having respective oppositely facing base surfaces, permanently securing each of said web areas into a laminate with the respective subjacent of said wall panel portions, and slitting said laminates longitudinally along respective substantially offset lines and thereby providing two bag making strips having differential length pull flanges along said fastener sets.
The present invention in addition provides a method of making multiple reclosable bag material, com-prising advancing from a supply source bag wall film in the form of a pair of colinear separate films and therehy providing wall panel portions with surfaces facing toward one another, feeding a continuous length of double separ-able fastener assembly from a supply source into corunning relation between and intermediate the longitudinal edges of said panel portions, permanently securing to said wall panel portions surfaces oppositely facing base surfaces on said fastener assembly, and joining together the opposite edges of the confronting wall panel portions, so that when the material is longitudinally separated into a pair of bag making strips, the strips can be separated into top opening bag sections having separable Eastener~; at their top openings~
B - ,B -;~2~7~
The present invention also provides a method of making m~lltiple recl.osable bag material, comprising advancing from a supply source bag wall film in the form of a collapsed tubular plastic extrusion wherein the collapsed extrusion provides colinear wall panel portions with surfaces facing toward one another, slitting one of said wall panel portions along a longitudinal line inter mediate the opposite edges of said one panel portion, separating margins of said one panel portion along said slit to provide a longitudinal opening, feeding a con-tinuous length of double separable fastener assembly from a supply source through said longitudinal opening into corunning relation between said wall panel portions, returning said one panel portion along said slit into closed coplanar relation and with the edges along said slit in edge-to-edge relation, and permanently securing to said wall panel portion surfaces oppositely facing base surfaces of said fastener assembly.
The present invention also provides a method of mak.ing multiple reclosable bag material, comprising ad-vancing from a supply source bag wall film in continuous ribbon of collapsed tubular film extrusion having opposite edges and wherein the collapsed tubular extrusion provides confronting colinear wall panel portions with surfaces facing toward one another, slitting one edge of the collapsed extrusion to provide an entrance into the collapsed extrusion, feeding a continuous length of double separable fastener assembly from a supply source laterally through said entrance and then diverting the continuous length into corunning lonyitudinal relation between and in intermediate position between said wall panel po:r-tions, permanently securing to said wall panel portion surfaces oppo.sitely facing base surfaces of said fastener assembly, ~2~
and sealing said slit side edge closed downs-tream from said divertlng of said fastener assembly.
Other features and advantages of the invention will be readily apparent from the following description of representative embodiments thereof, taken in conjunction with the accompanying drawings although variations and modifications may be effected without departing from the spirit and scope of the no~el concepts embodied in the di,sclosure and in which:
FIG. 1 is a fragmentary enlarged transverse sectional detail view showing multiple reclosable bag material produced according to the method of the present invention;
FIG. 2 is a similar sectional view showing a modified form of the fastener profiles;
FIG. 3 is a schematic illustration of one , preferred mode of practicing the present invention;
FIG. 4 is a schematic illustration of another mode of practicing the invention;
FIG. 5 is a schematic ilustration of a further mode of practicing the present invention;
FIG. 6 illustrates bag material produced according to the present method adapted fcr use in producing bottom open bags; and ~; FIG. 7 shows a modified arrangement for bottom ; open bags from multiple reclosable bag material produced according to the present invention.
Referring to FIG. 1, multiple reclosable bag ` material 10 produced according to khe method o~ the pre-sent invention comprises bag wall film, preEerably of a suikable extruded plastic material, providing colinear wal:L
5~
panel portions 11 and 12 with respective surfaces 13 facing toward one another.
Separable fastener assembly means 14 colinear with and located between the panel por~ions 11 and 12 comprises extruded plastic, complementary resiliently flexible fastener profile sections, one of which has an upper base web 15 and the other of which has a lower base web 17. These base webs 15 and 17 are of substantial width and have along each opposite edge a separable zipper profile structure, comprising profile structures 18 on the web 15 and complementary profile structures 19 on the web 17. The profile structures 18 and 19 in this in-stance are of the well known complementary plural rib and groo~e type.
Oppositely facing base surfaces 20 of the fastener strips are permanently secured, in the present instance, along the webs 15 and 17 to the panel portion surfaces 13 in any suitable fashion, such as by heat welding as in-dicated at 21 and which effects fusion of the laminated sur~aces. In this instance, the base surfaces 20 along the profile heads or sections 18 and 19 are ~llowed to re-main free from attachment to the wall surfaces 13 so that the wall pan~l~ 11 and 12 may expand relative to the joined profiles without opening the fastener.
Separation of the multiple reclosable bag material in~o two separate bag forming strip sections is adapted to be effected along a longitudinal line 22 midway between the opposi~e edges of the base webs 15 and 17. The reclosable bag material may also be adapted to be separated at two locations with the upper base web being cut closer to one profile as at 22a and with the lower web being cut: closer ~s~
to the other profile as at 22b, thereby resulting in pull flanges of different lengths on the finished bags. This provides respective multi-thickness bag mouth opening pull flanges 23 comprising the separated portions of the webs 15 and 17 and the maxgins of the wall panels 11 and 12 to which they are laminated. By making possible a heavier pull flange, it becomes easier to separate the interlocking profiles of the finished bag. It will be understood, of course, that the separated multiple rec~osable bag material strip sections wili be eventually divided transfersely in-to separate bag units.
In the modified multiple reclosable bag material 24, as shown in FIG. 2, confronting colinear wall panel portions 25 and 27 have respectiv~ surfaces 28 facing toward one another and provided therebe~ween with colinear separable fastener assembly means 29 of the type wherein cc~xt~ ~; v e A respective upper and lowerlbase webs 30 and 31 have their oppositely facing base surfaces permanently secured as by means of heat fusion welding 32 to the wall panel portion surfaces 28. In this instance, the fastener strips are provided with complementary separably interloc~Ing mak~s profiles 33 on the upper base web 30 and female profiles 34 on the lower base web 31. Alterna~ely, each web could carry a male and female profile that interlocks with the complementary profiles of the other base web. By separat-; ing the multiple reclosable bag material 24 along a long-itudinal line 35 midway of ~he webs 31, the bag strips in-to which the material 24 is divided will have respective multi-thickness pull flanges 37 comprising the fused to-gether segments of the webs 30 and 31 and the margins of the panels 25 and 27.
~2~ 8~i Both embodiments of the multiple reclosable bag material, 10 and 24, are adapted to be made according to the method exemplified in ~IG. 3. To t:his end, bag wall film 11, or 25, is ad~anced in continuous strip form from a supply source such as a xoll 38, and bag wall film 12 or 27 is advanced in continuous strip form from a supply source such as a roll 39, thereby providing cvnfronting ; colinear wall panel portions with surfaces 13 or 28, fac-ing toward one another. Separable fastener assembly means 14 or 29, in continuous strip form is fed from a supply source such as a roll 40 into corunning relation bet~een the panel portions 11 or 25 and 12 or 27. As will be observed, the continuous, coru~ning relation between the panel portions and the fastener assembly means is along a ; 15 common longitudinal axis, in this instance, centered be-tween the wall p~nel portions 11 or 25 and 12 or 27.
Permanent securement of the confronting panel por-tion suxfaces 13 or 28, to the oppositely facing base sur-: ~ faces of the fastener assembly means 14 or 29, is effected by means o heat welding heads 41 and 42 disposed on re-. spectively opposite sides, which, as shown, are the topand bottom sides of the bag wall film and separable fast-ener assembly means sandwich. This effec~s welding of the laminar surfaces:of the wall film and fastener assembly to attain either of the permanent fused securement as demon-strated in FIGS. 1 and 2.
Although the outer edge margins of the wall panel portions 11 or 25 and 12 or 27 may be left open or bot~om bag filling of the subseguently separated bag seation strips, tha wall panel portion margins may, as shown, ba heat fusion sealed as by means of a seal head assembly 43 5~
at each of the opposite margins~ Thereafter, by severing the assembly along -the longitudinal line 22 or 35 into two bag section strips, the ultimate bag unitc; will be adapted to be filled from the top by opening the respective separable fasteners, and then reclosing the Easteners to re~ain the bay contents.
As shown in FIG. 4, the method of making multiple reclosable bag material 44 may comprise advancing from a supply source such as a roll 45 bag plast;c wall film 47 which has been fabricated by extrusion in tubular form and collapsed for convenient winding into the roll 45, from which the film is advanced as a continuous strip which is : provided with confronting colinear wall panel portions 48 and 49 joined along opposite margins by closed juncture bends 50. For feeding separable fastener assembly means 51 in continuous strip form from a supply source such as a roll 52 into corunning relation between the wall panel portions 48 and 49, one of the panel portions, herein the panel portion 48, is slit open along a lonc3i~udinal line preferably midway of the width of the panel portions. For this purpose, a slitting edge device 53 is mounted on a suitable supporting frame 54 and with the edge of the slitter facing upstream relative to the direction of advance of the film 47. In addition to slitting the web wall panel portion 48, the device 53 functions as a spreader so that margins 55 of the panel portion 43 along the slit are spread apart to provide a longitudinal gap 57 ; of sufficient width to receive the fastener assembly 51 therethrough ~o be sandwiched between the wall panel portions 48 and 49. ~fter he corunning fastener assembly means 51 has entered through the slit, the margins 55 are closed over into edge-to-edge relationt as dep:icted, the fastener assembly Sl as by means of a closing guide device 58. EIeat sealing or welding of the i.nwardly facing sur-faces oE the margins 55, and the inner surface of the wall panel 49, to the oppositely facing upper base surfaces of the fastener assembly means 51 may be effected by heat sealing heat means 59~ Thereafter, the permanently secured wall panel and fastener assembly means may be longitudinally divided along a line 6Q, which may be coincident with the joint between the edges of the margins 55, into two bay strip sections to be ultimately divided into top filling bag units.
Referring to FIG. 5, another arrangement is shown for making multiple reclosable bag material 61 utilizing bag wall film 62 in continuous strip form comprising col-lapsed tubularly extruded plastic Eilm supplied from asuitable source such as a roLl 63. In order to assemble separable fastener assembly means 64 derived from a suit-able source such as a roll 65 into sandwiched position between the colinear wall panel portions 67 and 68 having inner surfaces facing toward one another, slitting and spreader means 69 has a sli~ting edge 70 facing upstream and located to slit open a juncture 71 along one edge of the collapsed film 62 and then spread margins 72 along the slit so that the fastener assembly means 64 can be fed into position between the wall panels 67 and 68. Such feeding is adapted to be effected by train;ng the fastener assembly means strip 64 about a guide ro:Ller 73 into the slit between the margins 72 toward the longitudinal eenter between the wall panels 67 and 68 where a turn bar or roller device 74 turns the fatener strip asse~bly 64 lnto corunning relation longitudinally between the panels 67 and 68 and between longitudinal guides 75 which may be supported in 7~
assembly with the turn bar device 74. Permanent secure-ment of the panel 67 and 68 to the oppositely fasing upper and lower base surfaces of the fastener assembly strip means 64 is adapted to be effected as by means of a heat welding head 77. Downstream from the point where the fastener strip means 64 enters between the panels 67 and 68, a margin closure guide 79 closes the margins 72 to-gether and means such as heat sealing head structure 80 may secure the margins 72 into a clo~ed seam 81.
While all film and fastener material is indicated as coming f~om rolls, it is also possible that such com-ponents could come directly from one or more extrusion sources.
In all forms of the invention as shown in FIGS. 3, 4 and 5r it will be understood that suitable supporting, feeding, controlling and guiding means for the components, and then the assembly of ~he reclosable bag material will be provided as is generally accepted practice.
Where both of the reclosable bag material sections are to provide bottom open bags to facilitate filling the bags from the bottom while the separable closure means re-mains closed, multiple reclosable bag material 82 (FIG. 6) may be provided wherein both opposite edges of the assembly are open. This condition may be arrived at by forming the bag material according to the method as described in con-nection with FIG. 3, but omitting the marginal sealing step.
Also, instead of having the edges of the bag wall film panel portions coextensive as in FIG. 6, the multiple re-closable hag material 82' as shown in FIG. 7 may have one of the panel portions 83' narrower than the opposite panel portion 84'. By having the panel portions 83' and 84' _g_ I
~5~
centered opposite one another, the margins o the panel portion 84' are offset laterally rela~ive to the margins of the other panel portion 83'. In other respects, the bag material 82' may be th~ same as the! bag material 82 in FIG. 6. On the other hand, this result may be attained by slitting both edges of a collapsed tube form of the film material ~y slitting both edges instead of only one edge as shown in FIG. 5, and then omi~ting sealing of the margins along the edge slits. In other respects, the bag material 82 may be substantially the same as in any of the described assemblies, that is, wall panel portions 83 and 84 will have separable fastener assembly means 85 longitud-inally centrally permanently secured ~herebetween and then sevsred along a longitudinal line 87, between the spaced parallel separable fastener profile assemblies, into two bag strip sections adapted to be subdivided into bag units.
: In all forms of the bag material produced according to the present invention, the margins of the wall panel por-tions laminated to the base webs of the fastener assemblies provide for multi-thickness pull flanges at the mouth ends of bags to be formed from the material, to facilitate digital manipulation for opening the separable closures.
The bays are reclosable by pressing the fastener profiles together~
. It will be understood that variations and modiica-tions may be effected without departing from the spirit and scope of the novel concepts of this invention.
Claims (15)
1. A method of making multiple reclosable bag material, comprising:
advancing from a supply source bag wall film as a continuous ribbon and providing confronting colinear wall panel portions with surfaces facing toward one another and of a width sufficient to provide two continuous bag strip sections;
feeding a continuous length of double separable fastener assembly from a supply source into corunning relation between said wall panel portions and intermediate and spaced from the longitudinal sides of said wall panel portions, and wherein said fastener assembly has two coextensive webs which carry along confronting opposite longitudinal margins respective complementary resiliently flexible fastener profile sets which are separably interlocked and with substantial width areas of the webs intervening between the profile carrying margins on each of the webs and having respective oppositely facing base surfaces;
placing said web base surfaces respectively in laminar relation to said facing surfaces on superjacent parts of the bag wall film panel portions;
and permanently securing into a laminate each of said superjacent parts of said wall panel portions and only intermediate areas of the webs and leaving the profile carrying marginal portions of each of the webs free from the panel portion surfaces;
so that by logitudinally separating said laminates between and spaced from said fastener profile sets into separate bag making strips, each strip will have thereon one of said fastener profile sets and each strip will be provided with multilayer pull flanges formed from said laminates and with both of the fastener carrying margins free from the panel portion surfaces on both wall panel portions of each strip.
advancing from a supply source bag wall film as a continuous ribbon and providing confronting colinear wall panel portions with surfaces facing toward one another and of a width sufficient to provide two continuous bag strip sections;
feeding a continuous length of double separable fastener assembly from a supply source into corunning relation between said wall panel portions and intermediate and spaced from the longitudinal sides of said wall panel portions, and wherein said fastener assembly has two coextensive webs which carry along confronting opposite longitudinal margins respective complementary resiliently flexible fastener profile sets which are separably interlocked and with substantial width areas of the webs intervening between the profile carrying margins on each of the webs and having respective oppositely facing base surfaces;
placing said web base surfaces respectively in laminar relation to said facing surfaces on superjacent parts of the bag wall film panel portions;
and permanently securing into a laminate each of said superjacent parts of said wall panel portions and only intermediate areas of the webs and leaving the profile carrying marginal portions of each of the webs free from the panel portion surfaces;
so that by logitudinally separating said laminates between and spaced from said fastener profile sets into separate bag making strips, each strip will have thereon one of said fastener profile sets and each strip will be provided with multilayer pull flanges formed from said laminates and with both of the fastener carrying margins free from the panel portion surfaces on both wall panel portions of each strip.
2. A method according to claim 1, which comprises supplying said bag wall film as a pair of separate colinear films to provide said wall panel portions, feeding the separable fatener assembly into centered logitudinal relation between the panel portions, and sealing the edges of said colinear panel portions together along each side of the ribbon.
3. A method according to claim 1, which comprises supplying said bag wall film in the form of a collapsed tubular plastic extrusion which provides said panel portions, slitting one of said panel portions intermediate its logitudinal edges along a single line longitudinal slit to provide an entrance for said fastener assembly, spreading said one panel portion at edges along the entrance, feeding the fastener assembly into the entrance between the spread apart edges, closing said spread apart edges into edge-to-edge relation onto the adjacent base surface of the fastener assembly, and permanently securing said one panel portion and said edges to said adjacent base surface.
4. A method according to claim 1, which comprises supplying said bag wall film in the form of a collapsed tubular plastic extrusion having opposite edges, slitting the collapsed tubular extrusion along one edge, feeding the separable fastener assembly laterally through the slit thus formed, and then diverting the laterally fed fastener assembly into longitudinal relation between the wall panel portions.
5. A method according to claim 1, which comprises slitting said laminates along offset lines, and thereby providing separate bag making strips having pull flanges of differential lengths.
6. A method of making multiple reclosable bag material, comprising:
advancing from a supply source bag wall film as a continuous ribbon and providing confronting colinear wall panel portions with surfaces facing toward one another and of a width sufficient to provide two continuous bag strip sectons;
feeding a continuous length of double separable fastener assembly from a supply source into corunning relation between said wall panel portions and intermediate and spaced from the longitudinal sides of side wall panel portins, and wherein said fastener assembly has two spaced coextensive webs having along confronting opposite longitudinal margins respective complementary resiliently flexible fastener profile sets which are separably interlocked and with substantial width areas of the webs intervening between the profiles on each of the webs and the webs having respective oppositely facing base surfaces;
permanently securing each of said web areas into a laminate with the respective subjecent of said wall panel portions;
and slitting said laminates longitudinally along respective substantially offset lines and thereby providing two bag making strips having differential length pull flanges along said fastener sets.
advancing from a supply source bag wall film as a continuous ribbon and providing confronting colinear wall panel portions with surfaces facing toward one another and of a width sufficient to provide two continuous bag strip sectons;
feeding a continuous length of double separable fastener assembly from a supply source into corunning relation between said wall panel portions and intermediate and spaced from the longitudinal sides of side wall panel portins, and wherein said fastener assembly has two spaced coextensive webs having along confronting opposite longitudinal margins respective complementary resiliently flexible fastener profile sets which are separably interlocked and with substantial width areas of the webs intervening between the profiles on each of the webs and the webs having respective oppositely facing base surfaces;
permanently securing each of said web areas into a laminate with the respective subjecent of said wall panel portions;
and slitting said laminates longitudinally along respective substantially offset lines and thereby providing two bag making strips having differential length pull flanges along said fastener sets.
7. A method according to claim 6, comprising leaving portions of the fastener web surfaces back of the profile sets free from said wall panel portion surfaces.
8. A method of making multiple reclosable bag material, comprising:
advancing from a supply source bag wall film in the form of a pair of colinear separate films and thereby providing wall panel portions with surfaces facing toward one another;
feeding a continuous length of double separable fastener assembly from a supply source into corunning relation between and intermediate the longitudinal edges of said panel portions;
permanently securing to said wall panel portions surfaces oppositely facing base surfaces on said fastener assembly;
and joining together the opposite edges of the confronting wall panel portions, so that when the material is longitudinally separated into a pair of bag making strips, the strips can be separated into top opening bag sections having separable fasteners at their top openings.
advancing from a supply source bag wall film in the form of a pair of colinear separate films and thereby providing wall panel portions with surfaces facing toward one another;
feeding a continuous length of double separable fastener assembly from a supply source into corunning relation between and intermediate the longitudinal edges of said panel portions;
permanently securing to said wall panel portions surfaces oppositely facing base surfaces on said fastener assembly;
and joining together the opposite edges of the confronting wall panel portions, so that when the material is longitudinally separated into a pair of bag making strips, the strips can be separated into top opening bag sections having separable fasteners at their top openings.
9. A method of making multiple reclosable bag material, comprising:
advancing from a supply source bag wall film in the form of a collapsed tubular plastic extrusion wherein the collapsed extrusion provides colinear wall panel portions with surfaces facing toward one another;
slitting one of said wall panel portions along a longitudinal line intermediate the opposite edges of said one panel portion;
separating margins of said one panel portion along said slit to provide a longitudinal opening;
feeding a continuous length of double separable fastener assembly from a supply source through said longitudinal opening into corunning relation between said wall panel portions;
returning said one panel portion along said slit into closed coplanar relation and with the edges along said slit in edge-to-edge relation;
and permanently securing to said wall panel portion surfaces oppositely facing base surfaces of said fastener assembly.
advancing from a supply source bag wall film in the form of a collapsed tubular plastic extrusion wherein the collapsed extrusion provides colinear wall panel portions with surfaces facing toward one another;
slitting one of said wall panel portions along a longitudinal line intermediate the opposite edges of said one panel portion;
separating margins of said one panel portion along said slit to provide a longitudinal opening;
feeding a continuous length of double separable fastener assembly from a supply source through said longitudinal opening into corunning relation between said wall panel portions;
returning said one panel portion along said slit into closed coplanar relation and with the edges along said slit in edge-to-edge relation;
and permanently securing to said wall panel portion surfaces oppositely facing base surfaces of said fastener assembly.
10. A method according to claim 9, which comprises severing said wall panel portion sand fastener assembly longitudinally along the closed slit into a pair of bag making material strips.
11. A method of making multiple reclosable bag material, comprising:
advancing from a supply source bag wall film in continuous ribbon of collapsed tubular film extrusion having opposite edges and wherein the collapsed tubular extrusion provides confronting colinear wall panel portions with surfaces facing toward one another;
slitting one edge of the collapsed extrusion to provide an entrance into the collapsed extrusion;
feeding a continuous length of double separable fastener assembly from a supply source laterally through said entrance and then diverting the continuous length into corunning longitudinal relation between and in intermedite positon between said wall panel portions;
permanently securing to said wall panel portion surfaces oppositely facing base surfaces of said fastener assembly;
and sealing said slit side edge closed downstream from said diverting of said fastener assembly.
advancing from a supply source bag wall film in continuous ribbon of collapsed tubular film extrusion having opposite edges and wherein the collapsed tubular extrusion provides confronting colinear wall panel portions with surfaces facing toward one another;
slitting one edge of the collapsed extrusion to provide an entrance into the collapsed extrusion;
feeding a continuous length of double separable fastener assembly from a supply source laterally through said entrance and then diverting the continuous length into corunning longitudinal relation between and in intermedite positon between said wall panel portions;
permanently securing to said wall panel portion surfaces oppositely facing base surfaces of said fastener assembly;
and sealing said slit side edge closed downstream from said diverting of said fastener assembly.
12. A multiple reclosable bag material, comprising:
bag wall film in a continuous ribbon and providing confronting colinear wall panel portions with surfaces facing toward one another and of a width sufficient to provide two continuous bag strip sections;
a continuous length of double separable fastener assembly in colinear relation between said wall panel portions and intermediate and spaced from the longitudinal sides of the wall panel portions;
said fastener assembly having two coextensive webs which carry along confronting opposite longitudinal margins respective complementary resiliently flexible fastener profile sets which are separably interlocked and with substantial width areas of the webs intervening between the profile carrying margins on each of the webs and having respective oppositely facing base surfaces;
said web base surfaces being respectively in laminar relation to said facing surfaces on superjacent parts of the bag wall film panel portions;
and only intermediate areas of the webs being permanently secured into a laminate with superjacent parts of said wall panel portions and the profile carrying marginal portions of each of the webs being free from the panel portion surfaces;
so that the laminate is adapted to be longitudinally separated between and spaced from the fastener profile sets into separate bag making strips wherein each of the strips will have thereon one of said fastener profile sets and each strip will be provided with multi-layer pull flanges formed from said laminate and with both of the fastener carrying margins free from the panel portion surfaces on both wall panel portions of each strip.
bag wall film in a continuous ribbon and providing confronting colinear wall panel portions with surfaces facing toward one another and of a width sufficient to provide two continuous bag strip sections;
a continuous length of double separable fastener assembly in colinear relation between said wall panel portions and intermediate and spaced from the longitudinal sides of the wall panel portions;
said fastener assembly having two coextensive webs which carry along confronting opposite longitudinal margins respective complementary resiliently flexible fastener profile sets which are separably interlocked and with substantial width areas of the webs intervening between the profile carrying margins on each of the webs and having respective oppositely facing base surfaces;
said web base surfaces being respectively in laminar relation to said facing surfaces on superjacent parts of the bag wall film panel portions;
and only intermediate areas of the webs being permanently secured into a laminate with superjacent parts of said wall panel portions and the profile carrying marginal portions of each of the webs being free from the panel portion surfaces;
so that the laminate is adapted to be longitudinally separated between and spaced from the fastener profile sets into separate bag making strips wherein each of the strips will have thereon one of said fastener profile sets and each strip will be provided with multi-layer pull flanges formed from said laminate and with both of the fastener carrying margins free from the panel portion surfaces on both wall panel portions of each strip.
13. A multiple reclosable bag material according to claim 12, wherein said bag wall film comprises a pair of separately formed colinear films providing said wall panel portions, said fastener assembly being in centered longitudinal relation between the panel portions, and the edges of said panel portions being secured together along each side of the ribbon.
14. A multiple reclosable bag material according to claim 12, wherein said film comprises a collapsed tubular plastic extrusion which provides said panel portions, said extrusion having a slit along one of the panel portions intermediate the longitudinal edges thereof along a single longitudinal line for entrance of said fastener assembly into the tubular extrusion, and edges of said one panel portion along said slit being located in edge-to-edge relation on the adjacent base surface of the fastener assembly and permanently secured thereto.
15. A multiple reclosable bag material according to claim 12, wherein said bag wall film comprises a collapsed tubular plastic extrusion having opposite edges, one of said edges having been split for feeding of the separable fastener assembly laterally through the slit thus formed into longitudinal relation between the wall panel portions.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/416,619 US4528224A (en) | 1982-09-10 | 1982-09-10 | Method of making multiple reclosable bag material |
| US416,619 | 1982-09-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1205786A true CA1205786A (en) | 1986-06-10 |
Family
ID=23650662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000416523A Expired CA1205786A (en) | 1982-09-10 | 1982-11-26 | Method of making multiple reclosable bag material and the resulting material |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US4528224A (en) |
| EP (1) | EP0103244B1 (en) |
| CA (1) | CA1205786A (en) |
| DE (1) | DE3367877D1 (en) |
| DK (1) | DK158630C (en) |
Families Citing this family (102)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4767220A (en) * | 1983-12-30 | 1988-08-30 | First Brands Corporation | Interlocking closure bar for use in high temperature environment |
| US4655862A (en) * | 1984-01-30 | 1987-04-07 | Minigrip, Incorporated | Method of and means for making reclosable bags and method therefor |
| US4582549A (en) * | 1985-03-15 | 1986-04-15 | Minigrip, Inc. | Method and apparatus for producing bag making material having reclosable fasteners |
| ES8800634A1 (en) * | 1985-07-09 | 1987-11-16 | Dow Chemical Co | Method and apparatus for extruding a fastening profile onto a travelling film web. |
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|---|---|---|---|---|
| US3219084A (en) * | 1961-10-02 | 1965-11-23 | Flexigrip Inc | Double joined fastener and method of forming plural bags |
| DE1950724C3 (en) * | 1969-10-08 | 1981-12-17 | Siegel, Karl-Heinz, Dipl.-Kfm. Dr., 8500 Nürnberg | Bag made of plastic |
| US3608439A (en) * | 1970-02-18 | 1971-09-28 | Steven Ausnit | Method of making a flexible pilfer proof closure construction for bags |
| US3679511A (en) * | 1970-02-18 | 1972-07-25 | Steven Ausnit | Flexible pilfer proof closure construction for bags |
| US3780781A (en) * | 1971-09-07 | 1973-12-25 | Seisan Nipponsha Kk | Openable bag |
| US3948705A (en) * | 1972-07-25 | 1976-04-06 | Steven Ausnit | Method for making multiple plastic bags with reclosable fasteners thereon |
| FR2329439A1 (en) * | 1975-11-03 | 1977-05-27 | Flexico France Sarl | PROCESS AND MACHINE FOR JOINING A SHEET TO AT LEAST ONE BAND CARRYING A COUPLING PROFILE, THE PRODUCTS OBTAINED AND THEIR PARTS |
| US4279677A (en) * | 1979-11-16 | 1981-07-21 | Seissan Nippon-Sha K. K. | Method of means for joining plastic fastener strip to film |
-
1982
- 1982-09-10 US US06/416,619 patent/US4528224A/en not_active Expired - Lifetime
- 1982-11-26 CA CA000416523A patent/CA1205786A/en not_active Expired
-
1983
- 1983-09-02 EP EP83108664A patent/EP0103244B1/en not_active Expired
- 1983-09-02 DE DE8383108664T patent/DE3367877D1/en not_active Expired
- 1983-09-09 DK DK409783A patent/DK158630C/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DE3367877D1 (en) | 1987-01-15 |
| EP0103244B1 (en) | 1986-11-26 |
| EP0103244A1 (en) | 1984-03-21 |
| DK409783D0 (en) | 1983-09-09 |
| DK158630B (en) | 1990-06-25 |
| US4528224A (en) | 1985-07-09 |
| DK409783A (en) | 1984-03-11 |
| DK158630C (en) | 1990-12-10 |
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