|Publication number||US3827472 A|
|Publication date||6 Aug 1974|
|Filing date||16 Feb 1972|
|Priority date||5 Dec 1969|
|Publication number||US 3827472 A, US 3827472A, US-A-3827472, US3827472 A, US3827472A|
|Original Assignee||Seisan Nipponsha Kk|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (3), Referenced by (147), Classifications (12), Legal Events (2)|
|External Links: USPTO, USPTO Assignment, Espacenet|
Related US. Application Data  Continuation-impart of Ser. No. 882,491, Dec. 5,
52 11.8. C1. 150/3, 229/66  hit. Cl B65d 31/02  Field of Search-.....'..... 150/3; 229/66; 24/201 C  References Cited UNlTED STATES PATENTS 3,198,228 8/1965 Naito 150/3 x [Jetted States Patent 1191 1111 3,827,472
Uramoto 1 Aug. 6, 1974  RECLOSABLE BAG 3,323,707 -6/l967 King 229/66 0  Inventor: Tatsuro Uramoto, Tokyo, Japan 3473589 0/1969 0012 15 B  Assignee: Kabushiki Kaisha Seisan Nipponsha, primary Examiner 1)ona|d F. Norton Tokyo, Japan Attorney, Agent, or FirmHill, Gross, Simpson, Van  Filed: 16, 1972 Santen, Steadman, Chiara & Simpson  Appl. No.: 226,680
[ 5 7] ABSTRACT A flexible bag structure having an outer layer and an inner layer with the layers bonded to each other and being coextensive to the top of the bag, and the inner layer formed of a plastic with interlocking rib and groove profiles integral with the plastic to close the I top of the bag and tear strip means integral with the inner layer and opposite the coextensive outerlayer for tearing the top off of the bag with the tear strip means preferably in the form of a pair of ribs.
11 Claims, 7 Drawing Figures I j 7 5 5a- 91 I a -5 9 r I *9 @g I, r 41 1 3 9 s a v 3 3 x PATENIE AUB 51974 SHEEI 1 0F 2 PATENIEDMIE fi I 3.827. 412
SHEEI 2 UF 2 INVENTOR TATSURO vRnMoTo A T70 I2 NEYS i RECLOSABLE BAG.
RELATED APPLICATIONS BACKGROUND OF THE INVENTION The invention relates to improvements in air-tight bags having reopenable closure structures at the top which interlock to exclude air and moisture from the contents thereof and which open when pulled apart to afford access to the interior thereof.
More particularly, the invention relates to an improved arrangement for bags of the reopenable type which are initially sealed, and are torn open by the user before using. After being torn open, interlocking rib and groove profiles beneath the torn part serve to reclose the bag when it is not in use and provide a reopenable closure for access to the contents of the bag. Such a bag has to comply with various functional requirements to be successful. For example if used for foodstuffs, it should be impervious to air and moisture to protect the foodstuffs from surrounding contamination, and should be impervious to greases, sugars or liquids or whatever the foodstuffs contain to prevent leakage. These requirements place heavy demands on any one material, and it is desirable to provide a multi-layered bag, and it is accordingly, an object of the present invention to provide an improved multi-layered bag of unique design which provides an improved tear strip arrangement at the top for initially opening the bag.
Before proceeding with a discussion of the specific features of this bag, a brief review of the importance of impervious reopenable bags will be useful. In the provision of plastic film bags, they are frequently used for contents which are subject to deterioration when permitted to come in contact with atmospheric air. The closure is, therefore, designed to exclude air and obtain preservation of the contents for a relatively long time. This type of bag and closure is conventionally made of suitable plastic such as polyethylene which can be obtained by extrusion processes. This type of bag is suitable for containing many types of products which require, for their preservation, the prevention of the penetration of air and moisture to the interior since the contents undergo chemical or physical changes due to the oxygen from the air and the moisture from the atmosphere, and if these are permitted to penetrate the bag, the contents are progressively deteriorated as time passes. Conventional types of containers employ vacuum packages or cans which evacuate atmospheric air from the contents before they are closed. This type of container, however, must be consumed after the container is open, or if a required amount is taken out of the container, the necessity arises for providing a container for the preservation of the remainder. Plastic film bags with air-excluding fasteners have an effective function for taking care of such contents to protect them.
However, in conventional flexible plastic bags, provisions are not made to absolutely prevent the penetration of air and to insure the prevention of inadvertent b. The disengagement or opening of the fastener means must be easily effected when the contents are partly or entirely taken out.
c. The sealing fastener means must have the ability to inhibit any penetration of air from the atmosphere outside of the pouch or the escape of air from inside the pouch.
d. The pouch body must have the ability to inhibit the passage of air from either the outside in or from the inside out so that through the cumulative effect of both the fastener and the pouch, the package as a whole is capable to prevent deterioration of the contents. Also, the conventional fastener means for closing pouches are formed from a simple combination of joining fastener means to the pouch body, both being of plastic such as polyethylene. In the relationship between the fastener and the pouch body, such conventional devices are satisfactory with respect to the above requisites (a) and (b) from maintenance of the contained products, but such devices lack the important structural arrangements to satisfy (c) and (d) for interception of the atmospheric air required to be excluded for safe perservation of the contents.
It is accordingly an object of the present invention to provide an improved flexible closure structure which will provide a more secure closure for a bag in the sense that it will exclude the passage of air in the atmosphere.
into the contents of the bag and prevent the flow of air from the interior out through the fastener for the bag.
DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a bag constructed in accordance with the principles of the present invention;
FIG. 2 is an enlarged fragmentary sectional view showing the parts separated for purposes of clarity;
FIG. 2a is an enlarged fragmentary sectional view taken substantially along line II-II of FIG. 1;
FIG. 2b is an enlarged fragmentary view showing the manner in which a bag constructed in accordance with the invention is opened;
FIG. 3 is a greatly enlarged sectional view showing a portion of the fastener of the invention;
FIG. 4 is a greatly enlarged sectional view showing the elements of FIG. 3 as they first interengage', and
FIG. 5 is a greatly enlarged sectional view similar to FIGS. 3 and 4 but showing the relative positions of the parts when fully interengaged.
DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1, 2, 2a and 2b, a bag or pouch construction 1 is formed with seams 6 along the side edges. The bottom of the bag is open for filling. The bag will normally be inverted when filled, and a heat seam will be formed along the bottom edge ill for closing the bag.
The material of the bag is originally formed by an extrusion process which forms a flat sheet. The sheet may initially be extruded as flat or in a tube and slit to form a flat sheet. Actually, a multiple sheet is formed with the sheets bonded together, and these separate sheets may be extruded separately or extruded at the same time and brought together adjacent the extrustion head to be laminated to each other. The upper sheet will form the plain outer layer of the bag, and the lower sheet will form the inner layer which carries the rib and groove profiles and the tear guide elements. The sheet is extruded as a continuous length, and cut into short lengths which are doubled at their center to form the fold shown at 10 in FIG. 2a. The sides of the folded sheet are then sealed to each other to form the side seams of the bag with the bottom remaining open until the bag is filled.
When the sheet is folded to form the bag, as shown in the form of FIGS. 1 and 2a, the inner layer 4 will be a thin plastic film having a characteristic suitable for the inner surface of the bag and suitable for the interlocking rib and groove elements 2a and 2b. A very thin layer of plastic 4 may be employed which provides an air and moisture impervious layer and which, when combined with the outer layer 3, has sufficient stiffness to function as a bag wall. Thus, each layer can be chosen to supply its own optimum characteristic, e.g., the inner layer can be chosen to provide a seal, the outer layer can be chosen to provide stiffness.
The bag walls are made up of the first outer layer and the second inner layers of plastic film which are laminated to each other, such as by being joined at the time of extrusion, or by being placed together and subjected to external heat or by being joined by an adhesive material extending between the layers. In some instances the outer layers can also be formed of plastic film of a greater thickness or of a film which has an inherent characteristic of greater stiffness. By providing the two layers of film thus laminated, it becomes easier to form and extrude each of the layers. The extrusion process for the inner layer can be carefully controlled for better formation of the rib and groove elements, and the inner layer can be quite thin since it does not have to provide a support for these elements. The outer layer can be extruded more rapidly and with a coarser extrusion apparatus since it is not necessary to obtain the careful tolerances of formation that are necessary with the rib and groove element. Also, if there happen to be any pinholes in either of the two layers, they will be sealed by the laminated opposing layer of film.
As shown in FIG. 1, the bag is formed with an open bottom 11 and side seams 6. Integral with the inner layer 4 is the rib element and groove element 2b.
These elements may take different forms and shapes, but a preferred simple arrangement is shown in the drawings of FIGS. 2, 2a and 2b, and details of modified versions are shown in FIGS. 3 through 5.
The rib and groove elements 2a and'2b are cooperatively shaped so that they will interlock when pressed together and will separate when pulled apart by grasping the upper two edges of the bag.
The bag is initially formed as shown in FIG. 2a, and the rib and groove elements 2a and 2b are pressed together. The bag is then filled from the bottom, and a heat seal is formed so that a completely sealed bag results.
At the time of use, the top is torn open to afford access to the contents and to first permit separating the rib and groove elements. This tearing operation is shown in FIG. 2b wherein the user grasps the top edge and pulls it away from the bag so that a tear occurs between the upper and lower ribs 5 and 5 and between the upper and lower ribs 9 and 9'. That is, along lines 5a and 9a as shown in FIG. 2. This tear line will follow straight across the top of the bag and will not deviate downwardly to tear down into the rib and groove elements, nor will it turn upwardly to run off the top of the bag. It will leave a relatively smooth top so that flanges will remain for pulling apart to separate the rib and groove elements. The ribs 9 and 5, and the ribs 9 and 5 may be either in alignment with each other as shown in FIG. 2a or may be slightly offset in location as shown in FIG. 2b.
While the means for guiding the tear across the top of the bag is shown in a preferred form as embodying pairs of ribs, it will be understood that other forms may be used such as a single rib, or a perforated line of weakened tear resistance such as by spaced notches or a V-groove. In any event, the entire tear guide means is carried by the inner layer 4 and contributed to the bag when the inner layer is laminated to the outer layer. This is a new concept which provides for an optimum tear function and yet does not interfere with the construction of the outer layer of the bag. Also, the tear guide ribs or other means are completely hidden within the bag and do not provide objectionable projections or grooves on the outer surface of the bag.
In some circumstances, the outer layer 3 may be transparent and the tear guide means may be colored so that the user may immediately locate and identify the tear guide means. It is also contemplated that tear starting means may be provided on either side of the bag such as a notch, which will indicate to the user where the tear is to begin and will insure that the tear occurs at the proper location.
Also, when the top of the bag is removed as indicated by the tear strip 12, the remaining portion provides convenient flanges, as provided by the ribs 9 and 5 for gripping the top of the bag and pulling apart the rib and groove elements.
The doubled over top 10 provides a complete seal for the bag until it is used. Also, the tear guide arrangement and the doubled over top provide a relatively stiff top for the bag which helps hold its form during storage and helps the top to be torn off.
It is also contemplated that the material of the tear guide ribs, whether a single rib or double rib is used, will be of harder plastic than the other material of the bag. This can be accomplished by supplying a harder plastic during the extrusion. With this structure, a relatively thin inner layer can provide all of the guide support that is needed for a heavy outer layer.
The details of construction of the rib and groove elements are shown in FIGS. 3 through 5. The rib 2a has a stem A which supports it on the layer of film 4 and a head with rounded outer surfaces and which tapers to a smaller size at its distal end.
The groove element 2b has a pair of jaws 8 with hooks E and E at their outer ends with inwardly facing planar surfaces that are slanted to be parallel to the inner surfaces B and B of the head so as to lie in surface to surface contact when the elements are fully engaged as shown in FIG. 5.
The head 2a has a width D which is measured parallel to the film layer 4, and a depth or height J which is measured normal thereto.
Similarly, the groove element 8 has a width F and a depth or height K. These dimensions are such that the width of the head D is at least as great as the width F between the jaws of the groove element. The outer curved surface of the head 2a and the inner curved surfaces of the jaws 8 are such that they are complementary when the head is first fully inserted between the jaws to the position shown in FIG. 4. The depth J of the head is less than the depth K of the recess of the groove element so that the head 2a can be fully inserted into the recess and past the hooks E and E and then seat in the position shown in FIG. 5. The width of the stem A is such that inner tips of the hooks I AND I extend substantially to the sides of the stern A. In fully interengaged position as shown in-FIG. 5, the difference between the depth of the head 2a and the groove element is shown at H.
As shown in FIG. 3, the fitting engagement between the head and the jaws are such that the engaging end portions L and L of the head pass the engaging end portions I and l' of the jaws during insertion. Their positional relationship after engagement is such that the engaging end portions L and L of the head are positioned at a point lower than the end positions I and I of the jaws.
Because of the presence of space H after their engagement of the rib and groove elements, as shown in FIG. 5, the rib element can move loosely in the groove element whenever given impact or rocking force due to forces from either outside or inside of the bag. The head thus moves freely in the surface between the head and groove element and acts as a bearing permitting free rocking movement preventing the breaking of the seal formed between the rib and groove. This structural relationship is significant because it prevents the inadvertent passage of air which might occur in conventional structures even though the interengagement was not completely broken.
The pouches are formed by first forming the plastic film such as by extrusion, and preferably extruding the interengaging elements therewith in sheet form or tubular form. By cross-sealing individual bags are then completed.
As an example of use for the bag, a discussion will be provided where a product is contained which absolutely requires the exclusion of air for its preservation when packed in a conventional fastener. When only a desired amount of such a product is taken out of the pouch, the remainder is retained therein, the fastener means is closed. A slight amount of oxygen is inevitably intorduced into the bag when the needed amount of contents are taken out. In the case of oil containing foodstuffs (such as pies, crackers, potato chips or biscuits) the introduced oxygen is consumed by the oxidation of the oil, with the result that oxygen pressure in the pouch is reduced to substantially zero. Such oxygen has a partial pressure of about one-fifth at. in the atmosphere and there is produced a difference of partial pressure of oxygen between the inside and outside of the bag. Consequently, brisk oxygen penetration into the bag is expedited causing additional oxidation of the product therein which obviously results in the deterioration of the flavor and quality of the product and degeneration thereof. Oxygen in the atmosphere tends not only to deteriorate the quality of the product but also expedites growth of aerobic germs, causing early decomposition or degeneration of the product. In case the contained product is a foodstuff such as a pie, and the quality is greatly affected by humidity, which contains in itself a small amount of moisture necessary to maintain its shape and quality, if the ambient atmosphere is under equal humidity conditions, this permits maintenance of an optimum humidity of the pie and there will be no change of quality of the pie since no moisture absorption nor dehumidification takes place. However, if either moisture due to dehumidification exceeds the limit of the humidity condition necessary for maintaining the pie quality, the optimum humidity of the pie itself and the ambient humidity are unbalanced causing deterioration and rapid detraction of its value as a commercial product.
Obviously change of product quality is directly re lated not only to humidity but also to temperature to which the product is exposed. It is known, for example, that the optimum relationship between the temperature and humidity for preserving the commodities resides within the range shown in the following table:
The above-mentioned units are only a portion of the commodities, but it may be observed that except for some specific articles which require low temperatures for their preservation, most of the commodities require an ordinary temperature of around 20C, but are bound more strictly by the humidity in which they are placed. Thus, the protection against humidity is frequently more significant than temperature maintenance.
in a humid district, therefore, there is need of providing suitable means for preventing excess humidity absorption, and to this end, usually a complementary measure such as the enclosure of a dessicant is taken. However, such measure increases cost because of labor, expenses of dessicant and inconvenience of handling due to increase of the volume.
The foregoing are examples where a fastener means which has no airtightness allows penetration of air and humidity into and out of the pouch and causes deterioration of the combined product. In case the contained article is one having a high fragrance or aroma such as coffee or bread and the like which requires an optimum humidity with a certain range for. its preservation, it is required to prevent the release of fragrance or humidity from the container. Thus, the opening and closing function of an opening fastener for a flexible bag will attain its desired function only when it serves both the retention of the packed article, but also to maintain its quality, particularly when the article is a specific one which requires protection against humidity and oxidatron.
In the improved bag of the instant invention, the bag walls are formed of a composite layer of material such as cellophane or polyethylene and aluminum foil or paper sheet. The inside layer is of plastic film so as to be joinable with the fastener assembly, and the outside layer of cellophane, foil or paper so as to give additional protection, body, resistance against scuffing and other properties which are afforded by the material of the outside layer.
Referring again to FIGS. 3 through 5, the structure is formed such that the profile or contour of any selected point of the outer surface of the head 7 corresponds or is the same as the profile of the inner surfaces of the jaws 8 except at the end points M and M when the head is fully inserted in the groove element. With the head fully inserted as shown in FIG. 4, the jaws 8 are slightly pushed apart so that their natural resiliency to return to their normal position provides a restoring force that tends to urge the head 7 of the rib outwardly to its normal locked position as shown in F IG. 5. To enhance the resiliency of the jaws, their thickness is gradually increased from the outer distal end toward the bottom where they are attached to the wall. This provides a larger resilient force for them to grip the head. The relationship between the jaws 8 and their outer hook ends I, l is such that they substantially engage the stem A in the closed position of FIG. thereby further inhibiting the possibility of flow of air past the closure.
- The surfaces B and B of the head 7 are arranged so that a line drawn to intersect their tips intersects the plane of the bag wall within the bag. The surfaes E and E of the hooks are similarly angled.
In the fully closed position of H6. 5, the curved surface of the head and the recess, and the additional depth 11 of the recess coact to permit a rolling of bearing-like action between the interengaging head and the groove insuring airtightness and preventing inadvertent disengagement and consequent opening of the bag.
in addition to the materials above recited with respect to the eliminations of the bag walls, materials such as PP, nylon, polyester, polycarbonate, etc. obtain a wall which is extremely tough and strong and may be very difficult to open with the fingertips due to the high elastic resistance of each layer. The other engaging airexcluding rib members aid in the opening function as well as providing an air-excluding seal themselves. When the bag is to be opened, the operator pulls apart the upper flanges and the rib members first separate providing thumb gripping surfaces to aid in disengaging the rib and groove elements.
The rib members are arranged so that their mechanical strength is larger than that of the film between them. In other words, the rib members are formed thicker than the wall thickness of the film in the recess between the rib members. in the alternative, the rib members may be made of a material which is harder than that which constitutes the film of the bag walls in the recess between them.
Since the ridges are constructed to have stronger tear resistance than the layer of film in the recessed portion between them, the tearing force applied for opening purposes to the recessed portion between the rib members is inhibited by the ribs from advancing in other directions. Thus, the entire tearing force in opening the bag is concentrated on the recessed portion to permit easy opening along the rib walls. Thus, the desired opening of the pouch can easily be effected by simple finger operation as shown in FIG. 2b with no need or using a scissors, knife or other such opening means.
Thus, it will be seen that l have provided an improved fastener which meets the objectives and advantages above set forth and which provides an improved, more effective pouch and fastener.
ll claim as my invention:
ii. A bag structure comprising in combination,
a bag body having walls with an upper end,
said walls having an outer layer and having an inner layer formed of plastic coextensive with the outer layer to the upper end and bonded thereto,
said outer layer formed of a first material having predetermined characteristics for the outer layer of the bag,
said inner layer formed of a second material having predetermined characteristics for the inner layer of the bag,
rib and groove cooperatively shaped releasable interlocking profiles near the upper end of the bag integral with the plastic of the inner layer,
and tear guide means formed in the plastic of the inner layer above said profiles for guiding the tearing of both layers with the outer layer extending uniformly over the area of the inner layer carrying said tear guide means.
2. A bag structure constructed in accordance with claim ll wherein said tear guide means includes a raised rib projecting inwardly and extending parallel to the profiles.
3. A bag structure constructed in accordance with claim it wherein said tear guide means includes a pair of parallel ribs defining a tear line between them.
4. A bag structure comprising in combination,
bag walls with a top end and with an inner layer formed of a plastic with releasably interlocking rib and groove elements on facing inner surfaces integral with said inner layer extending parallel to the top of the bag walls for closing the bag,
tear guide means extending across the top of the bag above the rib and groove elements defining a tear line and formed in said inner layer,
and an outer layer of a material having different physical characteristics than the inner layer to protect the inner layer and laminated thereto and extending to the top of the inner layer with the walls of the bag joined at the top end to form a closed top end.
5. A bag structure constructed in accordance with claim 4 wherein the bottom of the bag is open, and the rib and grooves are interlocked.
6. A bag structure constructed in accordance with claim 4 wherein said tear guide means includes a rib projecting inwardly from the inner layer.
groove elements areformed by extrusion with the inner layer.
10. A bag structure constructed in accordance with claim 4 wherein said inner and outer layers are fusion bonded.
11. A bag structure constructed in accordance with claim 4 wherein said layers are joined by an adhesive material extending therebetween.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US3198228 *||29 Oct 1962||3 Aug 1965||Seisan Nipponsha Kk||Integral reclosable bag|
|US3323707 *||15 Feb 1966||6 Jun 1967||King Leonard H||Tear-open package|
|US3473589 *||9 Dec 1966||21 Oct 1969||Minigrip Inc||Plastic bag|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US4191230 *||27 Apr 1978||4 Mar 1980||Minigrip, Inc.||Integral extruded construction for bags|
|US4212337 *||31 Mar 1978||15 Jul 1980||Union Carbide Corporation||Closure fastening device|
|US4246288 *||9 Aug 1979||20 Jan 1981||W. R. Grace & Co.||Reclosable package|
|US4290467 *||24 Oct 1979||22 Sep 1981||Minigrip, Inc.||Reclosable film plastic bags and method of making same|
|US4363345 *||18 Nov 1981||14 Dec 1982||Union Carbide Corporation||Reclosable container|
|US4572377 *||16 Jul 1984||25 Feb 1986||Beckett Donald E||Packaging structure|
|US4578813 *||11 Jun 1984||25 Mar 1986||Minigrip Incorporated||Bag and reclosable separable fastener assembly providing both closing alignment facility and differential separation resistance|
|US4589145 *||31 Oct 1983||13 May 1986||Signode Corporation||Packaging material and package|
|US4615045 *||1 Nov 1984||30 Sep 1986||Minigrip, Inc.||Pilfer proof hangup bag structure and method|
|US4617683 *||30 Jan 1984||14 Oct 1986||Minigrip, Inc.||Reclosable bag, material, and method of and means for making same|
|US4637063 *||4 Mar 1985||13 Jan 1987||Kcl Corporation||Reclosable bag with sealed laminated liner and method|
|US4655862 *||7 Mar 1986||7 Apr 1987||Minigrip, Incorporated||Method of and means for making reclosable bags and method therefor|
|US4663915 *||3 Mar 1986||12 May 1987||Signode Corporation||Method of packaging and apparatus|
|US4683015 *||9 Jul 1985||28 Jul 1987||The Dow Chemical Company||Method of forming flexible fastener elements and securing them to a traveling web|
|US4701358 *||19 Jul 1985||20 Oct 1987||The Dow Chemical Company||Thermoplastic film with integral closures and reclosable container formed therefrom|
|US4713839 *||21 Jan 1986||15 Dec 1987||Paramount Packaging Corp.||Resealable reusable flexible plastic bag with loop handle|
|US4720015 *||30 Apr 1986||19 Jan 1988||International Paper Company||Moisture-proof, linerless carton with reclosable top membrane|
|US4756628 *||10 Dec 1986||12 Jul 1988||Kcl Corporation||Reclosable flexible container having a downwardly depending cuff|
|US4764977 *||19 Feb 1987||16 Aug 1988||The Dow Chemical Company||Reclosable plastic container|
|US4767220 *||10 Aug 1987||30 Aug 1988||First Brands Corporation||Interlocking closure bar for use in high temperature environment|
|US4807300 *||13 Jul 1987||21 Feb 1989||Minigrip, Inc.||Plastic zipper bag with anchor-socket attachment arrangement|
|US4846585 *||29 Jan 1988||11 Jul 1989||Minigrip, Inc.||Easy open bag structure|
|US4848928 *||27 Apr 1987||18 Jul 1989||Minigrip, Inc.||Package with reclosable fin and method|
|US4877336 *||6 Mar 1989||31 Oct 1989||Paramount Packaging Corporation||Bottom loaded duplex bag having a handle and method of making same|
|US4903841 *||16 Nov 1988||27 Feb 1990||Kabushiki Kaisha Hosokawa Yoko||Pouch with superposed tear lines|
|US4923701 *||12 Jan 1989||8 May 1990||Minigrip, Inc.||Zippered cook-in-bag pouch and method|
|US4927271 *||12 Dec 1988||22 May 1990||Kcl Corporation||Recloseable tamper evident bag with hooded closure|
|US4966470 *||24 Feb 1989||30 Oct 1990||Oscar Mayer Foods Corporation||Tamper-evident, reclosable, flexible packages|
|US4971454 *||16 Nov 1989||20 Nov 1990||Kcl Corporation||Reclosable bag having a top closure attached to a bag body composed of multiple thermoplastic layers|
|US4986673 *||28 Dec 1989||22 Jan 1991||Kapak Corporation||Resealable bag arrangement and method|
|US5004356 *||28 Nov 1989||2 Apr 1991||Idemitsu Petrochemical Co., Ltd.||Fastener and wrapping bag having the same|
|US5022530 *||13 Oct 1989||11 Jun 1991||The Dow Chemical Company||Modified zipper elements for easy open containers|
|US5023122 *||9 Jun 1989||11 Jun 1991||Minigrip, Inc.||Easy open bag structure|
|US5026563 *||23 Mar 1989||25 Jun 1991||Zip-Pak Incorporated||Zippered closure for thermoformed package|
|US5033868 *||13 Oct 1989||23 Jul 1991||Paramount Packaging Corporation||Flexible plastic bag with perforated handle|
|US5063069 *||27 Apr 1990||5 Nov 1991||Zip-Pak Incorporated||Zippered closure for thermoformed package|
|US5064664 *||4 Apr 1990||12 Nov 1991||Oscar Mayer Foods Corporation||Package having engraved lettering peel seal tamper-evidence message|
|US5088164 *||22 Mar 1989||18 Feb 1992||Minnesota Mining And Manufacturing Company||Container with intermeshable closure members|
|US5092684 *||4 Mar 1991||3 Mar 1992||Illinois Tool Works Inc.||Post-applied zipper base with grip strip|
|US5100246 *||9 Oct 1990||31 Mar 1992||Illinois Tool Works Inc.||Pull bead and guide rails for easy open flexible containers|
|US5103979 *||11 Oct 1989||14 Apr 1992||Oscar Mayer Foods Corp.||Package having peel seal tamper-evidence message|
|US5112138 *||8 Jun 1990||12 May 1992||Paramount Packaging Corporation||Resealable reusable flexible plastic bag with loop handle|
|US5113555 *||26 Nov 1990||19 May 1992||Minnesota Mining And Manufacturing Company||Container with intermeshable closure members|
|US5116140 *||22 Jan 1991||26 May 1992||Kazuyoshi Hirashima||Easy-to-open synthetic resin bag|
|US5118202 *||29 Aug 1990||2 Jun 1992||Bruno Edward C||Tamper proof, recloseable plastic bag containing an object and method of making the same|
|US5121997 *||3 May 1991||16 Jun 1992||Illinois Tool Words Inc.||Perforated tear strip for easy-open flexible containers|
|US5172854 *||16 Oct 1991||22 Dec 1992||Moshe Epstein||Reclosable, reusable package|
|US5186543 *||19 May 1992||16 Feb 1993||Illinois Tool Works Inc.||Tear-open bag having guide strips|
|US5198055 *||8 Nov 1991||30 Mar 1993||Reynolds Consumer Products, Inc.||Method of forming recloseable packages, profiles used therein, and packages produced thereby|
|US5224779 *||20 Mar 1992||6 Jul 1993||Oscar Mayer Foods Corporation||Tamper-evident, reclosable flexible packages|
|US5246720 *||15 Jul 1992||21 Sep 1993||Buchko Raymond G||Reclosable package and method of making same|
|US5292392 *||21 Dec 1992||8 Mar 1994||Dowbrands Inc.||Method of making free edge-sealed film articles|
|US5366294 *||2 Dec 1993||22 Nov 1994||Reynolds Consumer Products, Inc.||Recloseable package having recloseable profile strips with a heat barrier|
|US5552202 *||11 Jul 1995||3 Sep 1996||Reynolds Consumer Products Inc.||Tear guide arrangement|
|US5613934 *||4 Apr 1996||25 Mar 1997||Reynolds Consumer Products Inc.||Method of forming a tear guide arrangement|
|US5660479 *||16 Feb 1996||26 Aug 1997||Reynolds Consumer Products Inc.||Easy open package header|
|US5672009 *||21 May 1996||30 Sep 1997||Illinois Tool Works Inc.||Reclosable pouch and zipper therefor|
|US5782733 *||20 Mar 1997||21 Jul 1998||Innoflex Incorporated||Zippered film and bag|
|US5806984 *||3 Jul 1996||15 Sep 1998||Innoflex Incorporated||Recloseable bag with profile strip fastener assembly|
|US5823933 *||20 Mar 1997||20 Oct 1998||Innoflex Incorporated||Zippered film and bag|
|US5829884 *||19 Jun 1997||3 Nov 1998||Innoflex Incorporated||Form fill and seal package with one-way vent|
|US5924795 *||2 Jul 1993||20 Jul 1999||Kraft Foods, Inc.||Tamper-evident, reclosable, flexible packages|
|US5938339 *||2 Jan 1997||17 Aug 1999||Ouchi; Toshikatu||Gored packing bag provided with an opening and closing fastener and method for producing same|
|US5951453 *||15 Nov 1996||14 Sep 1999||Innoflex Incorporated||Recloseable bag assembly and method of making same|
|US5954433 *||5 Dec 1997||21 Sep 1999||Innoflex Incorporated||Reclosable bag with improved opening feature|
|US6030514 *||2 May 1997||29 Feb 2000||Sony Corporation||Method of reducing sputtering burn-in time, minimizing sputtered particulate, and target assembly therefor|
|US6068585 *||28 May 1999||30 May 2000||Ouchi; Toshikatu||Gored packing bag with an opening and closing fastener and method for producing same|
|US6071011 *||12 Aug 1999||6 Jun 2000||Tenneco Packaging, Inc.||Fill-through-the-top package|
|US6079878 *||11 Apr 1997||27 Jun 2000||Yeager; James W.||Reclosable bag with profile strip fastener assembly, and bag body|
|US6126975 *||7 Aug 1998||3 Oct 2000||General Mills, Inc.||Container for storing fine particles|
|US6132780 *||9 Oct 1998||17 Oct 2000||General Mills, Inc.||Container for storing fine particles|
|US6148588 *||17 Dec 1999||21 Nov 2000||Pactiv Corporation||Fill-through-the-top package and method and apparatus for making the same|
|US6152600 *||3 Nov 1998||28 Nov 2000||Reynolds Consumer Products, Inc.||Particle-tolerating closure arrangement for reclosable bag and methods thereof|
|US6177172||7 Dec 1999||23 Jan 2001||Innoflex Incorporated||Zippered film and bag|
|US6270257||7 Oct 1999||7 Aug 2001||Innoflex Incorporated||Reclosable bag with profile strip fastener assembly having improved opening feature|
|US6279298||21 Oct 1999||28 Aug 2001||Pactiv Corporation||Fill-through-the-top package and method and apparatus for making the same|
|US6286999||11 May 1999||11 Sep 2001||Pactiv Corporation||Tamper-evident reclosable bag|
|US6318894||6 Oct 2000||20 Nov 2001||Kraft Foods Holdings, Inc.||Resealable flexible packages having hook design tear line|
|US6360513||1 Nov 1999||26 Mar 2002||Sargento Foods Inc.||Resealable bag for filling with food product(s) and method|
|US6378272||13 Dec 1999||30 Apr 2002||General Mills, Inc.||Method of making a container for storing fine particles|
|US6390715||31 May 2001||21 May 2002||Kathleen C. Gerbasi||Information displaying and dispensing apparatus with transparent pockets|
|US6416798||7 Mar 2000||9 Jul 2002||Sargento Foods Inc.||Packaging having protected information and method|
|US6419391||17 May 2001||16 Jul 2002||Pactiv Corporation||Reclosable bags having a tamper evident stepped member|
|US6439770||17 May 2001||27 Aug 2002||Pactiv Corporation||Reclosable bags having a tamper-evident retaining member extending through a slider|
|US6450685 *||27 Apr 2001||17 Sep 2002||Steven Michael Scott||Resealable metalized thermal bag|
|US6481891||29 Jun 2001||19 Nov 2002||Innoflex Incorporated||Reclosable bag with profile strip fastener assembly having improved opening feature|
|US6575625||27 Jul 2001||10 Jun 2003||Pactiv Corporation||Reclosable bags having a removable member encapsulating a slider|
|US6663283||18 May 2001||16 Dec 2003||Pactiv Corporation||Reclosable bags having a tamper-evident member extending over a zipper proximate to a slider|
|US6712509||21 Mar 2002||30 Mar 2004||Pactiv Corporation||Reclosable bag having tamper-evident member attached to body panels along a line of weakness located below the rib and groove profiles of the bag zipper|
|US6719140 *||4 Sep 2002||13 Apr 2004||Mark I. Rinsler||Food bag|
|US6779921||26 Dec 2000||24 Aug 2004||Innoflex Incorporated||Zippered film and bag|
|US6851161||2 Oct 2002||8 Feb 2005||Velcro Industries B.V.||Sealing closures|
|US6910806||20 Nov 2002||28 Jun 2005||Sargento Foods, Inc.||Resealable bag for filling with food product(S) and method|
|US6913387||20 Nov 2002||5 Jul 2005||Sargento Foods, Inc.||Resealable bag for filling with food product (s) and method|
|US6979482||8 Nov 2002||27 Dec 2005||Exopack-Technology, Llc||Multiwall bag with zipper and fin|
|US7008106||7 Nov 2002||7 Mar 2006||Pactiv Corporation||Reclosable bag having tamper-evident member removable from the bag along a line of weakness located below the bag zipper|
|US7040808||9 Jun 2003||9 May 2006||Pactiv Corporation||Reclosable bags with tamper evident features and methods of making the same|
|US7086782||20 Nov 2002||8 Aug 2006||Sargento Foods, Inc.||Resealable bag for filling with food products and method|
|US7090904||3 Jun 2004||15 Aug 2006||Exopack, L.L.C.||Enhanced slider zipper multiwall bag and associated methods|
|US7137736||19 May 2003||21 Nov 2006||S.C. Johnson Home Storage, Inc.||Closure device for a reclosable pouch|
|US7165887||20 Nov 2002||23 Jan 2007||Sargento Foods, Inc.||Resealable bag for filling with food product(s) and method|
|US7316641||15 Mar 2006||8 Jan 2008||Pactiv Corporation||Reclosable bags with tamper evident features and methods of making the same|
|US7320545||20 Nov 2002||22 Jan 2008||Sargento Foods Inc.||Resealable bag for filling with food product (s) and method|
|US7322920 *||16 Jan 2004||29 Jan 2008||Illinois Tool Works Inc.||Easy-open shrouded slider-zipper assembly for reclosable bag|
|US7410298||9 Apr 2004||12 Aug 2008||S.C. Johnson Home Storage, Inc.||Closure device for a reclosable pouch|
|US7419300||16 Jun 2004||2 Sep 2008||S.C. Johnson Home Storage, Inc.||Pouch having fold-up handles|
|US7494333||4 Jun 2004||24 Feb 2009||S.C. Johnson Home Storage, Inc.||Apparatus for forming multiple closure elements|
|US7604828||2 May 2005||20 Oct 2009||Conagra Foods Rdm, Inc.||Easy-open sausage package|
|US7850368||4 Jun 2004||14 Dec 2010||S.C. Johnson & Son, Inc.||Closure device for a reclosable pouch|
|US7904995 *||7 Apr 2006||15 Mar 2011||S2F Flexico||Bi-material closure device for a bag|
|US8506745||12 Apr 2006||13 Aug 2013||Donald K. Wright||Method of sealing reclosable fasteners|
|US8523437||20 Nov 2002||3 Sep 2013||Sargento Foods, Inc.||Resealable bag for filling with food product (s) and method|
|US9296522||2 Dec 2014||29 Mar 2016||Idemitsu Unitech Co., Ltd.||Easily tearable zipper tape and packaging bag with easily tearable zipper tape|
|US9504295||6 Apr 2015||29 Nov 2016||Velcro BVBA||Releasable fastenings with barriers|
|US9550617 *||26 Aug 2015||24 Jan 2017||Idemitsu Unitech Co., Ltd.||Zipper and zipper-equipped bag|
|US9623613 *||14 Mar 2014||18 Apr 2017||Chih-Hung Chen||Plastic bags|
|US20030019780 *||11 Jul 2002||30 Jan 2003||Parodi Gustavo Jose Camargo||Easy opening, re-closeable bag|
|US20030113042 *||26 Dec 2000||19 Jun 2003||Yeager James W.||Zippered film and bag|
|US20030236158 *||24 Jun 2002||25 Dec 2003||Pawloski James C.||Method of and apparatus for producing a reclosable pouch|
|US20040078938 *||23 Oct 2002||29 Apr 2004||Pawloski James C.||Closure device for a reclosable pouch|
|US20040078939 *||10 Jun 2003||29 Apr 2004||Pawloski James C.||Closure device for a reclosable pouch|
|US20040228547 *||3 Jun 2004||18 Nov 2004||Mark Hartzell||Enhanced slider zipper multiwall bag and associated methods|
|US20040234173 *||30 Apr 2004||25 Nov 2004||Saad Zain E.M.||Closure device for a reclosable pouch|
|US20040256761 *||17 Jun 2003||23 Dec 2004||Pawloski James C.||Method of and apparatus for producing a reclosable pouch|
|US20050031232 *||20 Nov 2002||10 Feb 2005||Jean-Claude Jammet||Package such as a bag with oriented tear opening|
|US20050157959 *||16 Jan 2004||21 Jul 2005||Johnson Joel L.||Easy-open shrouded slider-zipper assembly for reclosable bag|
|US20050286810 *||13 Jun 2005||29 Dec 2005||Reynolds Consumer Products, Inc.||Autoclavable reclosable package|
|US20050286811 *||13 Jun 2005||29 Dec 2005||Reynolds Consumer Products, Inc.||Autoclavable reclosable package|
|US20060201626 *||12 Apr 2006||14 Sep 2006||Wright Donald K||Method of sealing reclosable fasteners|
|US20060229183 *||7 Apr 2006||12 Oct 2006||Henri Bois||Bi-material closure device for a bag|
|US20060246185 *||2 May 2005||2 Nov 2006||Conagra Foods Packaged Foods Co., Inc.||Easy-open sausage package|
|US20060287181 *||16 Aug 2006||21 Dec 2006||Yeager James W||Zippered film and bag|
|US20070086682 *||1 Nov 2006||19 Apr 2007||Com-Pac International, Inc.||Airtight reclosable fastener|
|US20070206888 *||6 Mar 2006||6 Sep 2007||Chia-Hsiang Chang||Multi-pocket specimen bag incorporating easy tear lines for removal of pre-sealed inserts|
|US20080132394 *||29 Jan 2008||5 Jun 2008||Yeager James W||Zippered film and bag|
|US20100152010 *||19 Feb 2010||17 Jun 2010||Yeager James W||Zippered film and bag|
|US20110235951 *||21 Jan 2009||29 Sep 2011||Com-Pac International, Inc.||Reclosable bag with tear open feature|
|US20120020590 *||4 Feb 2010||26 Jan 2012||Idemitsu Unitech Co., Ltd.||Easily tearable zipper tape and packaging bag with easily tearable zipper tape|
|US20120275730 *||6 Dec 2010||1 Nov 2012||Idemitsu Unitech Co., Ltd.||Zipper tape and packaging bag with zipper tape|
|US20150259103 *||14 Mar 2014||17 Sep 2015||Chih-Hung Chen||Plastic bags|
|USRE39505 *||25 Aug 2003||13 Mar 2007||Pactiv Corporation||Fill-through-the-top package and method and apparatus for making the same|
|USRE40284||1 Nov 2006||6 May 2008||Pactiv Corporation||Methods of making and filling a fill-through-the-top package|
|WO1987002968A1 *||30 Oct 1986||21 May 1987||Kcl Corporation||Reclosable flexible container|
|WO1994001345A1 *||6 Jul 1993||20 Jan 1994||Fassomat S.A.||Protective package|
|WO1998024339A1 *||22 Oct 1997||11 Jun 1998||Tenneco Packaging Inc.||Multi-layer fins for plastic zipper bags|
|WO1998050598A1 *||4 May 1998||12 Nov 1998||Intel Corporation||Method of reducing sputtering burn-in time, minimizing sputtered particulate, and target assembly therefor|
|WO2015058427A1 *||7 Nov 2013||30 Apr 2015||大连竹菱包装工业有限公司||Integral plastic zipper strip with tear strip and packaging thereof|
|U.S. Classification||383/204, 383/63, 383/119, 383/107, 383/116|
|International Classification||A44B19/16, B65D33/25|
|Cooperative Classification||B65D33/2533, B65D33/2541, A44B19/16|
|European Classification||B65D33/25A1C, B65D33/25A3|
|11 Apr 1984||AS02||Assignment of assignor's interest|
Owner name: MINIGRIP, INC., ROUTE 303, ORANGEBURG, NY A CORP.
Effective date: 19840216
Owner name: SEISAN NIPPON SHA, LTD.,
|11 Apr 1984||AS||Assignment|
Owner name: MINIGRIP, INC., ROUTE 303, ORANGEBURG, NY A CORP.
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SEISAN NIPPON SHA, LTD.,;REEL/FRAME:004249/0408
Effective date: 19840216