WO2001093716A1 - Closure device - Google Patents
Closure device Download PDFInfo
- Publication number
- WO2001093716A1 WO2001093716A1 PCT/US2000/040123 US0040123W WO0193716A1 WO 2001093716 A1 WO2001093716 A1 WO 2001093716A1 US 0040123 W US0040123 W US 0040123W WO 0193716 A1 WO0193716 A1 WO 0193716A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- slit
- axis
- fastening
- fastening strips
- separator
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D33/00—Details of, or accessories for, sacks or bags
- B65D33/16—End- or aperture-closing arrangements or devices
- B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
- B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
- B65D33/2589—Bag or slide fastener details cooperating with the slider, e.g. details for removing or installing the slider
- B65D33/259—End stops
-
- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
- A44B19/00—Slide fasteners
- A44B19/10—Slide fasteners with a one-piece interlocking member on each stringer tape
- A44B19/16—Interlocking member having uniform section throughout the length of the stringer
-
- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
- A44B19/00—Slide fasteners
- A44B19/24—Details
- A44B19/26—Sliders
- A44B19/267—Sliders for slide fasteners with edges of stringers having uniform section throughout the length thereof
Definitions
- the present invention relates generally to closure devices and, more particularly, to a slider and interlocking fastening strips utilizing a slit.
- The' invention is particularly well suited for fastening flexible storage containers, including plastic bags.
- closure devices for fastening storage containers, including plastic bags, is generally known.
- closure devices made of plastic materials is generally known to those skilled in the art, as demonstrated by the numerous patents in this area.
- closure devices are in connection with flexible storage containers, such as plastic bags.
- the closure device and the associated container are formed from thermoplastic materials, and the closure device and the sidewalls of the container are integrally formed by extrusion as a single piece.
- the closure device and sidewalls of the container may be formed as separate pieces and then connected by heat sealing or any other suitable connecting process. In either event, such closure devices are particularly useful in providing a closure means for retaining matter within the bag.
- Closure" devices typically utilize mating fastening strips or closure elements, which are used to selectively seal the bag.
- sliders may be provided for use in opening and closing the fastening strips.
- the sliders may include a separator which extends at least partially between the fastening strips. When the slider is moved in the appropriate direction, the separator divides the fastening strips and opens the bag.
- the closure device comprises first and second interlocking fastening strips arranged to be interlocked over a predetermined length.
- the closure device .includes a slider, slidably disposed on the interlocking fastening strips for facilitating the occlusion and deocclusion of the fastening strips when moved towards first and second ends of the fastening strips. Slits are placed near the first end of the fastening strips. The slits facilitate the occlusion of the container by preventing the slider from deoccluding the fastening strips when the slider is at the first end.
- Fig. 1 is a perspective view of a container according to the present invention in the form of a plastic bag
- Fig. 2 is a fragmentary side view of the container in Fig. 1;
- Fig. 3 is a fragmentary top view of the container in Fig. 2;
- Fig. 4 is a cross-sectional view taken along line 4-4 in Fig. 3;
- Fig. 5 is a cross-sectional view taken along line 5-5 in Fig. 1;
- Fig. 6 is a fragmentary side view of another embodiment
- Fig. 7 is a fragmentary side view of another embodiment
- Fig. 8 is a fragmentary top view of the container in Fig. 7;
- Fig. 9 is a cross-sectional view pf another embodiment
- Fig. 10 is a cross-sectional view of another embodiment.
- Fig. 11 is a cross-sectional view of another embodiment .
- Figs. 1-5 illustrate an embodiment of a container in the form of a plastic bag 120 having a sealable closure device 121.
- the bag 120 includes a first sidewall 122 and a second sidewall 123 joined at seams 125, 126 to define a compartment accessible through the open top end but sealable by means of the closure device 121.
- the closure device 121 includes first and second fastening strips 130, 131 and a slider 132.
- the fastening strips 130, 131 and the slider 132 have a longitudinal X axis 102, a transverse Y axis 104 and a vertical Z axis 106.
- the transverse. Y axis 104 is perpendicular to the longitudinal X axis 102.
- the vertical Z axis 106 is perpendicular to the longitudinal X axis 102 and the vertical Z axis 106 is perpendicular to . the transverse Y axis 104.
- the fastening strips 130, 131 have a bottom edge 115 and a top edge 117.
- the fastening strips 130, 131 are adapted to be interlocked between a first end 127 and a second end 128.
- the fastening strips 130, 131 are secured together at the first and second ends 127, 128 to form end seals.
- the first and second ends 127, 128 include melted portions 135, 137, in which the fastening strips 130,
- first ,and second ends 127, 128 may ' be secured together by. plastic clamps, or other means.
- the first fastening strip 130 includes a first slit 183 placed in close proximity to the first end 127 and placed before the melted portion 135.
- the second fastening strip 131 may include a second slit 184 near the first end 127.
- the . first slit 183 may be used alone or in combination with the second slit 184.
- the slits 183, 184 extend downward in the vertical Z axis 106 beginning at the top edge 117 and extend to a point which is between the bottom and top edges 115, 117. In this embodiment, the slits 183, 184 are at 90° to the X axis 102.
- the slit 185 may be placed at an angle 186 relative to the X axis 102.
- the angle 186 may range from 1° to 179° from the X axis 102. A more preferred range is from 45° to 135°.
- the slit 185 may be used alone or in combination with other slits at the same or different angles.
- the slider 132 is mounted onto the fastening strips 130, 131 so that the slider 132 is restrained from being removed from the fastening strips 130, 131 in the Z axis 106, but free to slide along the X axis 102.
- the slider 132 engages the fastening strips 130, 131 so that when the slider 132 moves in an occlusion direction 114, the fastening strips 130, 131 interlock and the bag 120 is sealed, and when the slider 132 moves in a deocclusion direction 116, the fastening strips 130, 131 separate and • the bag 120 is open.
- the fastening strips include a first fastening strip 130 with a first closure element 136 and a second fastening strip 131 with a second closure element 134.
- the first closure element 136 engages the second closure element 134.
- the first fastening strip 130 may include a flange 163 disposed at the upper end of the first fastening strip 130 and a rib 167 disposed at the lower end of the first fastening strip 130.
- the first fastening strip 130 may also include tape portion 169.
- the second fastening strip 131 may include a flange 153 disposed at the upper end of the second fastening strip 131 and a rib 157 disposed at the lower end of the second fastening strip
- the second fastening strip 131 may also include tape portion 159.
- the side walls 122, 123. of the plastic bag 120 may be attached to the fastening strips 130, 131 by conventional manufacturing techniques .
- the second closure element 134 includes a base portion 138 having a pair of spaced-apart parallely disposed webs 140, 141, extending from the base portion 138.
- the base and the webs form a U-channel closure element.
- the webs 140, 141 include hook closure portions 142, 144 extending from the webs 140, 141 respectively, and facing towards each other.
- the hook closure portions 142, 144 include guide surfaces 146, 147 which serve to guide the hook closure portions 142, 144 for occluding with the hook closure portions 152, 154 of the first closure element 136.
- the first closure element 136 includes a base portion 148 including a pair. of spaced-apart, parallely disposed webs 150, 151 extending from the base portion 148.
- the base and the webs form a U-channel closure element.
- the webs 150, 151 include hook closure portions 152, 154 extending from the webs 150, 151 respectively and facing away from each other.
- the hook closure portions 152, 154 include guide surfaces 145, 155, which generally serve to guide the hook closure portions 152, 154 for occlusion with the hook closure portions 142, 144 of the second closure element 134.
- the guide surfaces 145, 155 may also have a rounded crown surface.
- the slider 132 includes a top portion 172.
- the top portion provides a separator 143 having a first end and a • second end wherein the first end may be wider than the second end.
- the separator 143 may be triangular in shape.
- the slits 183, 184 extend downward in the vertical Z axis 106 beginning at the top edge 117 and end before the closure elements 134, 136.
- the slits 183, 184 end before the webs 140, 150.
- the slits may end below the webs 140, 150 but above the webs 141, 151.
- the slit 183 is provided in close proximity to the first end 127 for facilitating the closure of the fastening strips at the first end 127 as shown in Fig. 4.
- the slit 183 allows the top edge 117 of fastening strips 130, 131 to separate while preventing the bottom edge 115 from separating.
- the closure elements 134, 136 remain occluded when the slider is at a first end 127.
- the upper hook portions 142, 152 and the lower hook portions 144, 154 remain occluded when the slider is at the first end 127.
- the slit .
- the slit 183 allows the separator 142 to move the top edges 117 away from each other without separating the closure elements 134, 136 on the fastening strips.
- the slit 183 also provides an end stop for the slider.
- the separator 143 is allowed to move in the occlusion direction as far as the slit 183 and not further. Specifically, the separator 143 engages the portion 193 of the fastening strip which is to the left of the slit 183 as shown in Fig. 3.
- the portion 193 prevents the separator 143 from moving in the occlusion direction.
- the portion 193 blocks the path of the separator 143 and the separator 143 cannot separate the closure elements due to the slit 183.
- Figs. 7 and 8 show a fragmentary side view of another embodiment of the closure device 221.
- the closure device 221 includes a first fastening strip 230, a second fastening strip 231 and a slider 232.
- the first fastening strip 230 may include a slit 233 and a second slit 234.
- the second fastening strip 231 may include a third slit 243 and a fourth slit 244.
- the slits 233, 234, 243, 244 start at the top edge 217 of the fastening strips 230, 231 and proceed to a point partway between the bottom and top edges 215, 217. In this embodiment, the slits begin at the top edge and end at a location above the closure elements.
- the slits 233, 234, 243, 244 may be placed near the first end 227 near the melted portion 235. When placed on both sides of the separator 242, the slits 233, 234, 243, 244 further facilitate the occlusion of the fastening strips 230, 231 by preventing the separator 242 from deoccluding the fastening strips 230, 231 as "described above.
- the slit or slits may be used on fastening strips with different closure elements.
- Figs. 9-11 illustrate interlocking fastening strips of different configurations with a slider.
- the interlocking fastening strips may comprise ⁇ arrowhead-type" or "rib and groove” fastening strips as shown in Fig. 9 and as described in U.S. Patent 3,806,998.
- the rib element 305 interlocks with the groove element 307.
- the rib element 305 is of generally arrow-shape in transverse cross section including a head 310 comprising interlock shoulder hook portions 311 and 312 generally convergently related to provide a cam ridge 313 generally aligned with a stem flange 314 by which the head is connected in spaced relation with respect to the supporting flange portion 308.
- the shoulder portions 311 and 312 define reentrant angles therewith providing interlock hooks engageable with interlock hook flanges 315 and 317 respectively of the groove element 307.
- Said hook flanges generally converge toward one another and are spread open to receive the head 310 therebetween when said head is pressed into said groove element 307 until the head is fully received in a groove 318 of said groove element 307 generally complementary to the head and' within which the head is interlocked by interengagement of the head shoulder hook portions 311 and 312 and the groove hook flanges 315 and 317.
- the slider 319 includes a flat back plate 320 adapted to run along free edges 321 on the upper ends of the sections of the flange portions 308 and 309 as shown in the drawing.
- the side walls 322 are in the form of panels which are laterally divergent from a narrower end of the slider. (U.S. Patent 3,806,998, Col. 2, lines 51-55).
- the slider walls 322 are each provided with an inwardly projecting shoulder structure 324 flange adapted to engage respective shoulder ribs 325 and 327 on respectively outer sides of the lower section of the flange portions 308 and • 309. (U.S. Patent 3,806,998, Col. 2, line 66 to Co. 3, line 3).
- the interlocking fastening strips may comprise "profile" fastening strips, as shown in Fig. 10 and described in U.S. Patent 5,664,299.
- the first profile 416 has at least an uppermost closure element 416a and a bottommost -closure element 16b.
- the closure elements 416a and 416£> project laterally from the inner surface of strip 414.
- the second profile 417 has at least an uppermost closure element 417a and a bottommost closure element 417&. (U.S. Patent 5,664,299, Col. 3, lines 28-30).
- closure elements 417a and 417£> project laterally from the inner surface of strip 415.
- U.S. Patent 5,664,299, Col. 3, lines 30-32 U.S. Patent 5,664,299, Col. 3, lines 30-32
- the- closure elements of profile 416 interlock with the corresponding closure elements of profile 417.
- U.S. Patent 5,664,299, Col. 3, lines 32- 34 closure elements 416a, 4162?, 417a and 417jb have hooks on the ends of the closure elements, so that the profiles remain interlocked when the bag is closed, thereby forming a seal.
- U.S. Patent 5,664,299, Col. 3, lines 34-37 U.S. Patent 5,664,299, Col. 3, lines 34-37
- the straddling slider 410 comprises an inverted U- shaped member having a top 420 for moving along the top edges of the strips 414 and 415.
- the slider 410 has side walls 421 and 422 depending from the top 420.
- a separating leg 423 depends from the top 420 between the side walls 421 and 422 and is located between the uppermost closure elements 416a and 417a of profiles 416 and 417. (U.S. Patent 5,664,299, Col. 4, lines . 26-30) .
- the fastening assembly includes ridges 425 on the outer surfaces of the fastening strips 414 and 415, and shoulders 421j and 422j on the side walls of the slider.
- the shoulders act as means for maintaining the slider in straddling relation with the fastening strips by grasping the lower surfaces of the ridges 425.
- the interlocking fastening strips may be "rolling action" fastening strips as shown in Fig. 11 and described in U.S. Patent 5,007,143.
- the strips 514 and 515 include profiled tracks 518 and 519 extending along the length thereof parallel to the rib and groove elements 516 and 517 and the rib and groove elements 516, 517 have complimentary cross-sectional shapes such that they are closed by pressing the bottom of the elements together first and then rolling the elements to a closed position toward the top thereof. • (U.S. Patent 5,007,143, Col. 4, line 62 to Col. 5, line 1) .
- the rib element 516 is hook shaped and projects from the inner face of strip 514. (U.S. " Patent 5,007,143, Col.
- the groove element 517 includes a lower hook- shaped projection 517a and a relatively straight projection 517jb which extend from the inner face of strip 515.
- the profiled tracks , 518 and 519 are inclined inwardly toward each other from their respective strips 514 and 515. (U.S. Patent 5,007,143, Col. 5, lines 6-8) .
- the straddling slider 510 comprises an inverted U- shaped plastic member having a back 520 for moving along the top edges of the tracks 518 and 519 with side walls 521 and
- a separator finger 523 depends from the back 520 between the side walls
- the slider 510 has shoulders 521a and 522a projecting inwardly from the depending side walls 521 and 522 which are shaped throughout the length thereof for cooperation with the depending separator finger 523 in creating the rolling action in opening and closing the reclosable interlocking rib and groove profile elements 516 and 517. (U.S. Patent 5,007,143, Col. 5, lines 43-49) .
- the interlocking fastening strips may be manufactured by extrusion through a die and ' may be formed from any suitable thermoplastic material including, for example, polyethylene, polypropylene, nylon, or the like, or from a combination thereof.
- suitable thermoplastic material including, for example, polyethylene, polypropylene, nylon, or the like, or from a combination thereof.
- resins or mixtures of resins such as high density polyethylene, medium density polyethylene, and low density polyethylene may be employed to- prepare the interlocking fastening strips.
- the fastening strips and the films that form the body of the bag may be conveniently manufactured from heat sealable ' material.
- the bag may be economically formed by using an aforementioned thermoplastic material and by heat sealing the fastening strips to the bag.
- the bag may be made from a mixture of high pressure, low density polyethylene and linear, low density polyethylene.
- the fastening strips may be manufactured by extrusion or other known methods.
- the closure device may be manufactured as individual fastening strips for later attachment to the bag or may be manufactured integrally with the bag.
- the fastening strips may be manufactured with, or without flange portions on one or both of the fastening strips depending upon the intended use of the fastening strips or expected additional manufacturing operations.
- the slits may be cut during the manufacturing of the fastening strips using rollers which contain an appropriately placed knife edge.
- the fastening strips can be manufactured in a variety of forms to suit the intended use.
- the fastening strips may be integrally formed on the opposing sidewalls of the container or bag, or connected to the container by the use of any of many known methods.
- thermoelectric device may be applied to a film in contact with the flange portion of the fastening strips or the thermoelectric device may be applied to a film in contact with the base portion of fastening strips having no flange portion, to cause a transfer of heat through the film to produce melting at the interface of the film and a flange portion or base portion of the fastening strips.
- Suitable thermoelectric devices include heated rotary discs, traveling heater bands, resistance-heated slide wires, and the like.
- the connection between the film and the fastening strips may also be established by the use of hot melt adhesives, hot jets of air to the interface, ultrasonic heating, or other known methods .
- the bonding of the fastening strips to the film stock may be carried out either before or after the film is U-folded to form the bag. In any event, such bonding may be done prior to side sealing the bag at the edges by conventional thermal cutting.
- the first and second fastening strips may be positioned on opposite sides of the film. Such an embodiment would be suited for wrapping an object or a collection of objects such as wires.
- the first and second fastening strips should usually be positioned on the film in a generally parallel relationship with respect to each other, although this will depend on the intended use.
- the slider may be multiple parts and snapped together. In addition, the slider may be made from multiple parts and fused or welded together.
- the slider may also be a one piece construction.
- the slider can be colored, opaque, translucent or transparent.
- the slider may be injection molded or made by any other method.
- the slider may be molded from any suitable plastic material, such as,- nylon, polypropylene, polystyrene, acetal, toughened acetal, polyketone, polybutylene terrephthalate, high density polyethylene, polycarbonate or ABS (acrylonitrile-butadiene-styrene) .
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/049,535 US6568046B1 (en) | 2000-06-06 | 2000-06-06 | Closure device |
PCT/US2000/040123 WO2001093716A1 (en) | 2000-06-06 | 2000-06-06 | Closure device |
CA002381041A CA2381041C (en) | 2000-06-06 | 2000-06-06 | Closure device |
AU68021/00A AU778845B2 (en) | 2000-06-06 | 2000-06-06 | Closure device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US2000/040123 WO2001093716A1 (en) | 2000-06-06 | 2000-06-06 | Closure device |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001093716A1 true WO2001093716A1 (en) | 2001-12-13 |
Family
ID=21742122
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2000/040123 WO2001093716A1 (en) | 2000-06-06 | 2000-06-06 | Closure device |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU778845B2 (en) |
CA (1) | CA2381041C (en) |
WO (1) | WO2001093716A1 (en) |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2975496A (en) * | 1959-05-14 | 1961-03-21 | W J Mcgraw | Closure device |
US3173184A (en) * | 1962-09-21 | 1965-03-16 | Ausnit Steven | Shaped head top closure |
US5007143A (en) * | 1990-03-07 | 1991-04-16 | Mobil Oil Corp. | Rolling action zipper profile and slipper therefor |
US5020194A (en) * | 1990-03-07 | 1991-06-04 | Mobil Oil Corporation | Leakproof zipper with slider |
US5070583A (en) * | 1990-03-07 | 1991-12-10 | Mobil Oil Corporation | Gull wing zipper slider |
US5442838A (en) * | 1994-06-17 | 1995-08-22 | Mobil Oil Corporation | Rolling action zipper profile and slider |
US5442837A (en) * | 1994-06-20 | 1995-08-22 | Mobil Oil Corporation | Integrated end stops for zipper slider |
US5664299A (en) * | 1996-09-10 | 1997-09-09 | Dowbrands L.P. | Reclosable fastener assembly |
US5809621A (en) * | 1996-12-26 | 1998-09-22 | S. C. Johnson Home Storage Inc. | Reclosable fastener assembly with a plastic zipper and slider |
US5924173A (en) * | 1996-08-16 | 1999-07-20 | Tenneco Packaging | End posts for plastic zipper |
US5950285A (en) * | 1997-08-29 | 1999-09-14 | S. C. Johnson Home Storage Inc. | Endstop and docking means for thermoplastic bags |
US6047450A (en) * | 1999-02-09 | 2000-04-11 | Illinois Tool Works Inc. | Slide zipper assembly |
-
2000
- 2000-06-06 CA CA002381041A patent/CA2381041C/en not_active Expired - Fee Related
- 2000-06-06 AU AU68021/00A patent/AU778845B2/en not_active Ceased
- 2000-06-06 WO PCT/US2000/040123 patent/WO2001093716A1/en active IP Right Grant
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2975496A (en) * | 1959-05-14 | 1961-03-21 | W J Mcgraw | Closure device |
US3173184A (en) * | 1962-09-21 | 1965-03-16 | Ausnit Steven | Shaped head top closure |
US5007143A (en) * | 1990-03-07 | 1991-04-16 | Mobil Oil Corp. | Rolling action zipper profile and slipper therefor |
US5020194A (en) * | 1990-03-07 | 1991-06-04 | Mobil Oil Corporation | Leakproof zipper with slider |
US5070583A (en) * | 1990-03-07 | 1991-12-10 | Mobil Oil Corporation | Gull wing zipper slider |
US5442838A (en) * | 1994-06-17 | 1995-08-22 | Mobil Oil Corporation | Rolling action zipper profile and slider |
US5442837A (en) * | 1994-06-20 | 1995-08-22 | Mobil Oil Corporation | Integrated end stops for zipper slider |
US5924173A (en) * | 1996-08-16 | 1999-07-20 | Tenneco Packaging | End posts for plastic zipper |
US5664299A (en) * | 1996-09-10 | 1997-09-09 | Dowbrands L.P. | Reclosable fastener assembly |
US5809621A (en) * | 1996-12-26 | 1998-09-22 | S. C. Johnson Home Storage Inc. | Reclosable fastener assembly with a plastic zipper and slider |
US5950285A (en) * | 1997-08-29 | 1999-09-14 | S. C. Johnson Home Storage Inc. | Endstop and docking means for thermoplastic bags |
US6047450A (en) * | 1999-02-09 | 2000-04-11 | Illinois Tool Works Inc. | Slide zipper assembly |
Also Published As
Publication number | Publication date |
---|---|
CA2381041C (en) | 2008-08-05 |
AU778845B2 (en) | 2004-12-23 |
CA2381041A1 (en) | 2001-12-13 |
AU6802100A (en) | 2001-12-17 |
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