WO2002015732A1 - Dispositif de fermeture - Google Patents

Dispositif de fermeture Download PDF

Info

Publication number
WO2002015732A1
WO2002015732A1 PCT/US2000/022753 US0022753W WO0215732A1 WO 2002015732 A1 WO2002015732 A1 WO 2002015732A1 US 0022753 W US0022753 W US 0022753W WO 0215732 A1 WO0215732 A1 WO 0215732A1
Authority
WO
WIPO (PCT)
Prior art keywords
axis
fastening strips
distance
slider
fastening
Prior art date
Application number
PCT/US2000/022753
Other languages
English (en)
Inventor
Jeffrey S. Stiglic
Original Assignee
The Glad Products Company
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by The Glad Products Company filed Critical The Glad Products Company
Priority to AU2000267873A priority Critical patent/AU2000267873A1/en
Priority to PCT/US2000/022753 priority patent/WO2002015732A1/fr
Publication of WO2002015732A1 publication Critical patent/WO2002015732A1/fr

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
    • 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

Definitions

  • the present invention relates generally to closure devices and, more particularly, to a slider and interlocking fastening strips.
  • 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 .
  • 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.
  • Conventional closure devices typically utilize mating fastening strips or closure elements, which are used to selectively seal the bag.
  • a slider may be provided for use in opening and closing the fastening strips.
  • the slider 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 slider can be disengaged from the slider if a certain amount of force is applied to the slider.
  • the fastening strips are disposed parallel in regards to their bottom and top edges. As the slider is pulled away from the bag, the bottom edges of the fastening strips typically are forced inward, allowing the slider to be pulled away from the fastening strips .
  • the present invention solves this problem by providing fastening strips wherein the bottom portions of ' the fastening strips are placed at a further distance than the top portions of the fastening strips. This increases the pull-off force required to disengage the slider from the fastening strips.
  • the present invention provides a closure device which comprises first and second interlocking fastening strips arranged to be interlocked over a predetermined length.
  • the closure device additionally 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 .
  • the first and second interlocking fastening strips prevent the slider from being disengaged from the first and second fastening strips by increasing the pull-off force required to disengage the slider.
  • the presence of a greater separation of the bottom portions of the first and second fastening strips may force the bottom portions outward as the slider is moved upward away from the first and second fastening strips so as to prevent the slider from being disengaged from the fastening strips.
  • 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 cross-sectional view taken along line 3-3 in Fig. 2;
  • Fig. 4 is a cross-sectional view taken along line 4-4 in Fig . 2 ;
  • Fig. 5 is a cross-sectional view of an embodiment
  • Fig. 6 is a cross-sectional view of another embodiment
  • Fig. 7 is a cross-sectional view of another embodiment.
  • Figs. 1-4 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 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 fastening strips 130, 131 are angled outward to prevent the slider 132 from being removed from the fastening strips 130, 131 in the direction of the Z axis 106. More specifically, the distance between the first and second fastening strips 130, 131 is greater at the bottom portion 115 than the top portion 117.
  • 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.
  • Figs. 3 and 4 illustrate cross-sectional views taken at two points along the slider 132 as shown in Fig. 2.
  • the slider 132 includes a separator 133 that facilitates the deocclusion of the fastening strips 130, 131.
  • the separator 133 includes a first end and a second end. The separator may be triangular in shape and the first end may be wider than the second end.
  • the fastening strips 130, 131 include closure elements 136, 137 that are engaged and disengaged as the fastening strips 130, 131 are occluded and deoccluded.
  • Fig. 3 illustrates the fastening strips 130, 131 and the slider 132 wherein the fastening strips 130, 131 are fully occluded.
  • the top portion 117 of the fastening strip 130 is. at a distance 140 from the top portion 117 of the fastening strip 131.
  • the bottom portion 115 of the fastening strip 130 is at a distance 142 from the bottom portion 115 of the fastening strip 131.
  • the distance 142 is greater than the distance 140.
  • the distance 142 is in the range of 10% - 400% greater than the distance 140. In a preferred embodiment, the distance 142 is in the range of 50% - 100% greater than the distance 140.
  • the distance 142 is in the range of 60% - 80% greater than the distance 140.
  • the distance 142 is wider than the distance 144 of the gap 150 located between the shoulders 152, 154. This prevents the slider 132 from being disengaged from the fastening strips 130, 131 in the direction of the Z axis 106. Furthermore, as the slider 132 is pulled in the direction of the Z axis 106, the distance 142 increases, further adding to the pull -off force required to disengage the slider 132.
  • the fastening strips are angled outward.
  • the angle 160 of the fastening strips may be in the range of 3 to 21 degrees, preferably in the range of 9 to 15 degrees, and more preferably in the range of 11 to 13 degrees .
  • Fig. 4 illustrates the fastening strips 130, 131 and the slider 132 wherein the fastening strips 130, 131 have been fully deoccluded.
  • the distance 142 prevents the slider 132 from being disengaged from the fastening strips 130, 131.
  • the interlocking fastening strips of the present invention may be of virtually any type or form.
  • the fastening strips may be U- channel fastening strips as described in U.S. Patent 4,829,641.
  • U-channel fastening strips include a first fastening strip 230 with a first closure element 236 and a second fastening strip 231 with a second closure element 234.
  • the first closure element 236 engages the second closure element 234.
  • the first fastening strip 230 may include a flange portion 269.
  • the second fastening strip 231 may include a flange portion 259.
  • the side walls 222, 223 of the plastic bag 220 may be attached to the fastening strips 230, 231 by conventional manufacturing techniques.
  • the second closure element 234 includes a base portion 238 having a pair of spaced-apart parallely disposed webs 240, 241, extending from the base portion 238.
  • the base and the webs form a U-channel closure element.
  • the webs 240 include hook closure portions 242, 244 extending from the webs 240, 241 respectively, and facing towards each other.
  • the hook closure portions 242, 244 include guide surfaces 246, 247 which serve to guide the hook closure portions 242,
  • the first closure element 236 includes a base portion 248 including a pair of spaced-apart, parallely disposed webs 250, 251 extending from the base portion 248.
  • the base and the webs form a U-channel closure element.
  • the webs 250, 251 include hook closure portions 252, 254 extending from the webs 250, 251 respectively and facing away from each other.
  • the hook closure portions 252, 254 include guide surfaces
  • the guide surfaces 245, 255 may also have a rounded crown surface .
  • the webs 241, 251 are longer than the webs 240, 250.
  • the base portions 238, 248 angle outwardly.
  • the slider 232 includes a top portion 272.
  • the top portion provides a separator 243 having a first end and a second end wherein the first end may be wider than the second end.
  • the separator 243 may be triangular in shape.
  • the interlocking fastening strips may comprise "arrowhead-type” or "rib and groove” fastening strips as shown in Fig. 6 and as described in U.S. Patent 3,806,998.
  • the rib element 505 interlocks with the groove element 507.
  • the rib element 505 is of generally arrow-shape in transverse cross section including a head 510 comprising interlock shoulder hook portions 511 and 512 generally convergently related to provide a cam ridge 513 generally aligned with a stem flange 514 by which the head is connected in spaced relation with respect to the supporting flange portion 508. (U.S. Patent 3,806,998, Col. 2, lines 16-23).
  • the shoulder portions 511 and 512 define reentrant angles therewith providing interlock hooks engageable with interlock hook flanges 515 and 517 respectively of the groove element 507.
  • Said hook flanges generally converge toward one another and are spread open to receive the head 510 therebetween when said head is pressed into said groove element 507 until the head is fully received in a groove 518 of said groove element 507 generally complementary to the head and within which the head is interlocked by interengagement of the head shoulder hook portions 511 and 512 and the groove hook flanges 515 and 517.
  • the slider 519 includes a flat back plate 520 adapted to run along free edges 521 on the upper ends of the sections of the flange portions 508 and 509 as shown in the drawing.
  • the interlocking fastening strips may comprise "profile" fastening strips, as shown in Fig. 7 and described in U.S. Patent 5,664,299.
  • the first profile 616 has at least an uppermost closure element 616a and a bottommost closure element 616b.
  • the closure elements 616a and 616Jb project laterally from the inner surface of strip 614.
  • the second profile 617 has at least an uppermost closure element 617a and a bottommost closure element 611b. (U.S. Patent 5,664,299, Col. 3, lines 28-30).
  • closure elements 617a and 617b project laterally from the inner surface of strip 615.
  • U.S. Patent 5,664,299, Col. 3, lines 30-32 When the bag is closed, the closure elements of profile 616 interlock with the corresponding closure elements of profile 617.
  • U.S. Patent 5,664,299, Col. 3, lines 32- 34 closure elements 616a, 616b, 617a and 611b 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 610 comprises an inverted U- shaped member having a top 620 for moving along the top edges of the strips 614 and 615.
  • the slider 610 has side walls 621 and 622 depending from the top 620.
  • a separating leg 623 depends from the top 620 between the side walls 621 and 622 and is located between the uppermost closure elements 616a and 617a of profiles 616 and 617.
  • the fastening assembly includes shoulders 621b and 622Jb on the side walls of the slider.
  • the shoulders act as means for maintaining the slider in straddling relation with the fastening strips.
  • the fastening strips in Fig. 7 may be angled as noted above .
  • interlocking fastening strips may be "rolling action" fastening strips as shown in Fig. 8 and described in U.S. Patent 5,007,143.
  • the strips 714 and 715 include profiled tracks 718 and 719 extending along the length thereof parallel to the rib and groove elements 716 and 717 and the rib and groove elements 716, 717 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 716 is hook shaped and projects from the inner face of strip 714. (U.S. Patent 5,007,143, Col.
  • the groove element 717 includes a lower hook- shaped projection 717a and a relatively straight projection 717O which extend from the inner face of strip 715.
  • the profiled tracks 718 and 719 are inclined inwardly toward each other from their respective strips 714 and 715.
  • the straddling slider 710 comprises an inverted U- shaped plastic member having a back 720 for moving along the top edges of the tracks 718 and 719 with side walls 721 and 722 depending therefrom for cooperating with the tracks and extending from an opening end of the slider to a closing end.
  • a separator finger 723 depends from the back 720 between the side walls 721 and 722 and is inserted between the inclined tracks 718 and 719.
  • the slider 710 has shoulders 721a and 722a projecting inwardly from the depending side walls 721 and 722 which are shaped throughout the length thereof for cooperation with the depending separator finger 723 in creating the rolling action in opening and closing the reclosable interlocking rib and groove profile elements 716 and 717. (U.S. Patent 5,007,143, Col. 5, lines 43-49) .
  • the fastening strips in Fig. 8 may be angled as noted above .
  • the interlocking fastening strips may be manufactured by extrusion through a die.
  • the interlocking fastening strips may be formed from any 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 may be made from low density polyethylene.
  • 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 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.
  • a 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.
  • 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 is 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) .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Slide Fasteners (AREA)
  • Bag Frames (AREA)

Abstract

Le dispositif de fermeture (121) comprend des bandes de fermeture interverrouillables (130, 131) et un curseur (132). Les bandes de fermeture (130, 131) empêchent le curseur (132) de se détacher du dispositif de fermeture (121) vers le haut. La distance séparant les parties de fond (115) des bandes de fermeture (130, 131) est supérieure à la distance (140) entre les parties supérieures (117) des bandes de fermeture (130, 131). Si une force est appliquée au curseur (132) vers le haut, la partie de fond (115) des bandes de fermeture (130, 131) peut se séparer davantage pour empêcher le curseur (132) de se détacher.
PCT/US2000/022753 2000-08-18 2000-08-18 Dispositif de fermeture WO2002015732A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2000267873A AU2000267873A1 (en) 2000-08-18 2000-08-18 Closure device
PCT/US2000/022753 WO2002015732A1 (fr) 2000-08-18 2000-08-18 Dispositif de fermeture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2000/022753 WO2002015732A1 (fr) 2000-08-18 2000-08-18 Dispositif de fermeture

Publications (1)

Publication Number Publication Date
WO2002015732A1 true WO2002015732A1 (fr) 2002-02-28

Family

ID=21741689

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/022753 WO2002015732A1 (fr) 2000-08-18 2000-08-18 Dispositif de fermeture

Country Status (2)

Country Link
AU (1) AU2000267873A1 (fr)
WO (1) WO2002015732A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5007143A (en) * 1990-03-07 1991-04-16 Mobil Oil Corp. Rolling action zipper profile and slipper therefor
US5010627A (en) * 1990-03-07 1991-04-30 Mobil Oil Corporation Foldable plastic slider and method of assembly with a plastic reclosable fastener
US5442838A (en) * 1994-06-17 1995-08-22 Mobil Oil Corporation Rolling action zipper profile and 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
US5836056A (en) * 1996-09-10 1998-11-17 S. C. Johnson Home Storage Inc. Reclosable fastener assembly
US5871281A (en) * 1996-11-25 1999-02-16 Kcl Corporation Zipper slider pivoting wedge
US6047450A (en) * 1999-02-09 2000-04-11 Illinois Tool Works Inc. Slide zipper assembly

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5007143A (en) * 1990-03-07 1991-04-16 Mobil Oil Corp. Rolling action zipper profile and slipper therefor
US5010627A (en) * 1990-03-07 1991-04-30 Mobil Oil Corporation Foldable plastic slider and method of assembly with a plastic reclosable fastener
US5442838A (en) * 1994-06-17 1995-08-22 Mobil Oil Corporation Rolling action zipper profile and slider
US5664299A (en) * 1996-09-10 1997-09-09 Dowbrands L.P. Reclosable fastener assembly
US5836056A (en) * 1996-09-10 1998-11-17 S. C. Johnson Home Storage Inc. Reclosable fastener assembly
US5871281A (en) * 1996-11-25 1999-02-16 Kcl Corporation Zipper slider pivoting wedge
US5809621A (en) * 1996-12-26 1998-09-22 S. C. Johnson Home Storage Inc. Reclosable fastener assembly with a plastic zipper and slider
US6047450A (en) * 1999-02-09 2000-04-11 Illinois Tool Works Inc. Slide zipper assembly

Also Published As

Publication number Publication date
AU2000267873A1 (en) 2002-03-04

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