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WO1992017087A1 - Curseur de fermeture a glissiere a aile en m - Google Patents

Curseur de fermeture a glissiere a aile en m Download PDF

Info

Publication number
WO1992017087A1
WO1992017087A1 PCT/US1991/002154 US9102154W WO9217087A1 WO 1992017087 A1 WO1992017087 A1 WO 1992017087A1 US 9102154 W US9102154 W US 9102154W WO 9217087 A1 WO9217087 A1 WO 9217087A1
Authority
WO
WIPO (PCT)
Prior art keywords
slider
fastener
plastic
side walls
pair
Prior art date
Application number
PCT/US1991/002154
Other languages
English (en)
Inventor
Fox John Herrington
Original Assignee
Mobil Oil Corporation
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 Mobil Oil Corporation filed Critical Mobil Oil Corporation
Priority to PCT/US1991/002154 priority Critical patent/WO1992017087A1/fr
Publication of WO1992017087A1 publication Critical patent/WO1992017087A1/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
    • B65D33/2584—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 characterized by the slider
    • B65D33/2586—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 characterized by the slider being provided with a separating plow
    • 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
    • B65D33/2541—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 characterised by the slide fastener, e.g. adapted to interlock with a sheet between the interlocking members having sections of particular shape
    • 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 to improvements in plastic sliders for opening and closing plastic reclosable fasteners on plastic bags and the like and particularly to improvements in "gull wing" type foldable plastic sliders for profiled plastic reclosable fasteners on plastic bags- Zippers with sliders are made commercially in several forms.
  • the most common ones used on clothing have teeth which interlock.
  • the teeth may be made of metal or plastic.
  • Other types of plastic zippers have profiles and include a pair of male and female fastener elements in the form of reclosable interlocking rib and groove elements with a slider for opening and closing the rib and groove elements.
  • thermoplastic film bags In the manufacture of thermoplastic film bags, a pair of these male and female fastener elements extend along the mouth of the bag and these male and female elements are adapted to be secured in any suitable manner to the flexible walls of the thermoplastic film bag. These elements may be integral marginal portions of such walls or they may be extruded separately and thereafter attached to the walls along the mouth of the bag. A method of continuously providing such a fastener on the thermoplastic film is disclosed in U.S. Patent No. 3,462,332.
  • the sliders for opening or closing the reclosable fasteners are essentially U-shaped and adapted to be assembled with the fastener or zipper by an endwise assembly or by a relative transverse maneuver.
  • the slider is normally molded from a semi-hard plastic where there is enough yieldability in the side walls of the slider to provide sufficient flexibility to enable spreading apart of the terminal portions of the side walls of the slider so as to clear the interlocking rib and groove elements to permit assembly of the slider with the zipper by relative transverse movement.
  • the slider is formed from a metal die casting or a hard plastic, it is then necessary to rely upon the plastic deformation of the plastic zipper elements to permit the transverse assembly movement of the slider.
  • the present invention is an improvement on the foldable plastic slider for a plastic reclosable fastener disclosed in the related application of F.J. Herrington and A. Goncarovs entitled "Foldable Plastic Slider and Method of Assembly with a Plastic Reclosable Fastener” Attorney Docket 5539 (MP-88-P-62) filed concurrently herewith.
  • Metal sliders as distinguished from plastic sliders have the disadvantage that they are not suitable for use on thermoplastic bags when the bags are to be placed in microwave ovens when heating food products.
  • a method of assembling a multi-part plastic slider with a plastic reclosable fastener is disclosed in my related application entitled “Method of Assembling a Snapped Together Multi-Part Plastic Slider with a Plastic Reclosable Fastener” Attorney Docket 5155 (MP-88-P-29) filed concurrently herewith.
  • Another method of assembling a multi-part plastic slider with a plastic reclosable fastener is disclosed in my related application entitled “Method of Assembling a Multi-Part Plastic Slider with a Plastic Reclosable Fastener by Ultrasonic Welding” Attorney Docket 5154 (MP-88-P-28) filed concurrently herewith.
  • a plastic leakproof zipper with slider is disclosed in the related application of F.J.
  • the present invention relates to a foldable plastic slider for straddling relation with a profiled plastic reclosable fastener particularly suited for thermoplastic bags and the like formed by a pair of flexible plastic sheets having a top edge with separable fastening means extending along the length thereof comprising reclosable interlocking male and female elements having rib and groove profiles on the respective sheets.
  • the straddling slider for closing or opening the reclosable fastening elements comprises a wedged-shaped separator finger and interlocking complimentary structure formed from plastic for moving along the fastener.
  • the complimentary structure comprises a transverse support member having the wedge-shaped separator finger depending therefrom, a pair of side walls hinged to the opposite sides of the support member at the top thereof and foldable relative to the separator finger and means for interlocking the opposite sides of the support member to the side walls.
  • the side walls extend from an opening end of the slider to a closing end, the side walls being spaced wider apart at the opening end to permit separation of the rib and groove elements by the wedged-shaped separator finger extending between the side walls at the opening end, the walls being spaced sufficiently close together at the closing end to press the rib and groove elements into interlocking relationship as the slider is moved in a fastener closing direction, at least one of the separator finger and the side walls having shoulder structure at the bottom thereof for cooperating with the bottom of the fastener to prevent the slider from being lifted off the top edge of the fastener while the slider straddles the fastener.
  • the hinged pair of side walls of the foldable plastic slider are ultrasonically welded to the support member.
  • the side walls of the foldable plastic slider and the opposite sides of the support member include interlocking structure to interlock the side walls with the support member.
  • It is a further object of the invention to provide a method of assembly of a foldable plastic slider comprising a body having a depending separator finger and a pair of foldable wings, with a profiled plastic reclosable fastener particularly suited for thermoplastic bags for opening and closing the fastener comprising the steps of positioning a plastic bag having a plastic reclosable fastener along the top edges of the front and back faces of the bag to receive the foldable plastic slider in straddling relation, the fastener comprising a first interlocking element having a female fastener profile attached to one of the faces of the bag and a second interlocking element having a male fastener profile attached to the other face of the bag, inserting the plastic separator finger between the first and second interlocking elements, and forming the slider in straddling relation around the male and female fastener profiles at the top edges of the bag by folding the pair of wings downwardly toward the plastic separator finger and against the opposite sides of the body, and securing the pair of wings to the opposite
  • Fig. 10 is a perspective view of a modification of a foldable plastic slider in accordance with the present invention.
  • Fig. 11 is a fractional view on enlarged scale of a portion of the slider illustrated in Fig. 10.
  • Fig. 12 is a perspective view of another modification of a foldable plastic slider in accordance with the present invention.
  • a foldable plastic slider 10 for a profiled plastic reclosable fastener embodying the present invention is particularly suited for thermoplastic bags and the like and has been illustrated in Fig. 1 in connection with the thermoplastic bag 11.
  • the bag 11 may be made from any suitable thermoplastic film such for example as polyethylene, polypropylene or equivalent material.
  • the bag 11 is formed by a pair of flexible plastic sheets 12 and 13 having a top edge with separable fastener means at the top edge extending along the length thereof having reclosable interlocking rib and groove profile elements 15 and 14 on the facing surfaces thereof.
  • a pair of male and female fastener elements 15 and 14 extend along the mouth of the bag and these (interlocking rib and groove profiles) elements are adapted to be secured in any suitable manner to the flexible walls of the thermoplastic film bags.
  • These elements may be integral marginal portions of such walls or they may be extruded separately and thereof attached to the walls along the mouth of the bag as well known in the art.
  • the elements 15 and 14 are attached to the respective walls of the bags on opposite sides of the bags as disclosed in Figs. 1-8.
  • the slider 10 straddles the reclosable fastener elements 14, 15 at the top of the bag 11 and is adapted for opening or closing the reclosable fastener elements.
  • the novel slider 10 is formed from a single piece of molded plastic comprising a wedge-shaped separator finger 19 and interlocking complimentary structure for moving along the fastener.
  • the slider 10 may be molded from any suitable plastic such for example as nylon, polypropylene, polystyrene, Detrin or ABS.
  • the complimentary structure comprises an inverted U-shaped member including a transverse support member or body 20 from which the wedge-shaped separator finger 19 depends.
  • the body 20 is adapted to move along the top edges of the fastener elements 14 and 15 and includes a pair of hinged "wings" or side walls 21 and 22 that can be folded down into their final position.
  • the wings 21 and 22 are hinged to the main slider body 20 by means of hinge structure 21a and 22a.
  • the hinge structure 21a and 22a is located on the opposite sides 20a, 20b of the main slider body 20 at the top thereof. This is to be contrasted with the location of the hinge structure at the bottom of the support member or body in the co-pending related application Attorney Docket 5539 referred to above. The importance of this location of the hinge structure in the present application will be hereinafter explained.
  • the hinge structure 21a and 22a is a relatively thin section of the plastic material as compared to the wall thicknesses of the wings 21 and 22 and the flexibility of the plastic material make possible the use of the integral hinged structure 21a and 22a which is sometimes referred to as "living" hinge.
  • the foldable depending side walls 21 and 22 extend from an opening end 10a of the slider 10 to a closing end 10b.
  • the side walls 21 and 22 are spaced wider apart at the opening end 10a of the slider 10, Figs. 2 and 3, to permit separation of the rib and groove elements 15 and 14 and are spaced sufficiently close together at the closing end 10b of the slider, Fig. 6, to press the rib and groove elements 14 and 15 into interlocking relationship as the slider 10 is moved in a fastener closing direction.
  • the side walls 21 and 22 at their lower ends are provided with inwardly extending shoulder structure 21c and 22c, Figs. 4-6, for engaging the bottom of the fastener comprising the rib and groove elements 15 and 14 to prevent the slider 10 from being lifted off the top edges of the fastener while the slider straddles the fastener as shown in Figs. 2 and 8.
  • the depending plastic separator finger 19 which extends between the side walls 21 and 22 is wider adjacent the opening end 10a of the slider 10 for separating the rib and groove elements 15 and 14 as the slider 10 is moved in the fastener opening direction, Figs. 2-4.
  • the tip of the separator finger 19 is tapered at the opening end 10a, Figs. 2 and 8, so that the slider 10 may be moved easily in the fastener closing direction. Referring to Figs.
  • a foldable plastic slider 10 with the profile plastic reclosable fastener of a thermoplastic bag formed by the pair of flexible plastic sheets 12 and 13 having a top edge with separable fastener means at the top edge extendin along the length thereof, having reclosable interlocking rib and groove profile elements 15 and 14 on the facing surfaces thereof.
  • the interlocking rib and groove profile elements 15 and 14 on the facing surface are placed in alignment so that they can be joined as indicated at the right hand end of Figs. 2 and 8.
  • the foldable slider 10 with the wings 21 and 22 in the open position, Fig. 9, is positioned above the profile elements 14 and 15 as shown in Fig. 7. When the elements 14 and 15 are joined as indicated at the right hand end of Fig.
  • the depending finger 19 is inserted between the top edges of the elements 14 and 15 as shown in Fig. 8.
  • the body 20 of the slider 10 then rests on the top of the elements 14 and 15.
  • the wings 21 and 22 are then folded down, as indicated by the arrows in Fig. 9, at the hinge structure 21a and 22a located at the top of the slider body 20 so that the wings 21 and 22 are in their folded side wall position against the edges 20a, 20b shown in Fig. 8.
  • the side walls 21 and 22 are in the folded position shown in Fig. 8 they are ultrasonically welde to the opposing edges or sides 20a, 20b of the main body structure 20 thus preventing the side walls 21 an 22 from being rotated upwardly around the hinge structure 21a and 22a.
  • the shoulders 21c and 22c on the side walls 21 and 22 are positioned beneath the bottom of the fastener elements 14 and 15, Figs. 4, 5 and 8, to prevent the slider 10 from being lifted off the top edges of the fastener.
  • the side walls 21 and 22 of the foldable slider 10 are integral with the body portion 20, this provides for ease in assembly as distinguished from multiple part sliders. It also provides for ease in manufacture and molding as pointed out above. Also since the slider is made from plastic material it can be used on a food bag in a microwave whereas a metal slider cannot. While the preferred form of the invention has been described in connection with a living hinge other plastics which are not suitable for making a living hinge can be used. Thus more brittle plastics can be used. It is only necessary that the side walls be folded down once and welded into place since the slider is not removed from the reclosable fastener elements once it is assembled.
  • a modified securing arrangement can be utilized within the scope of this invention.
  • a modification 10* of the slider 10 has been illustrated wherein the pair of hinged "wings" or side walls 21 and 22 are held in place against the slider body 20 by means of one or more lugs on the wings which latch into a mating socket on the slider body.
  • the slide 10* illustrated in Fig. 10 is identical with the slider 10 illustrated in Fig. 9 with the exception of the lugs on the wings which latch into mating sockets on the body member 20.
  • lugs 21b, 21b on the wing 21 latch into the mating sockets 20c, 20c on the body 20.
  • An enlargement of one of the lugs 21b and mating socket 20c on the main slider body 20 is illustrated in Fig. 11. It is to be understood that the other wing or side wall 22 likewise is provided with lugs, not shown, which mate with sockets 20d, 20d, Fig. 10 which are similar to the mating lugs 21b and sockets 20c previously described-.
  • the lug and recess can have a slight taper, so once they are pressed in place, they will be difficult to separate.
  • the recess can be tapered in a horizontal direction and the lug can have a very slight undercut as illustrated in Fig. 11. If the undercut on the lug is small, it is possible to press the molded part out of the mold, deflecting the lug enough to get past the mold.
  • FIG. 12 An alternative latching arrangement is illustrated in Fig. 12.
  • the slider be moldable using a simple 2-piece mold.
  • a mold of this type does not allow for severe undercuts as desired on the lug in the slider design.
  • an undercut may be created with a simple mold.
  • the resulting hole in the wing 21 created by the pin P does not interfere with the function of the slider 10' '.
  • the undercut lug 21b* latches into the mating profiled socket 20c 1 in the body 20 when the wing 21 is hinged closed.
  • Similar pins are used to make lugs in wing 22 to latch with the mating sockets 20d' in the edge 20b of body 20.
  • the mold M is opened by moving it in a downward direction.
  • the method of assembly disclosed herein is particularly suited for the manufacture of thermoplastic bags on a production line where the bags move sequentially along the production line.
  • the foldable plastic slider may be assembled with the bags prior to the formation of the side seals or after the formation of the side seals and severing of the individual bags as desired. In any event.the foldable plastic slider is assembled with a reclosable fastener structure at periodic intervals along the plastic profiles with one fastener for each bag to be manufactured.

Landscapes

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

Abstract

L'invention se rapporte à un curseur en plastique pliable (10) comportant une paire d'ailes articulées (21, 22) qui se rabattent par pliage et viennent se fixer en contact permanent sur les bords opposés (20a, 20b) du corps (20) du curseur, pour permettre le montage de ce dernier sur les éléments (14, 15) d'une fermeture à glissière en plastique refermable, lors de la fabrication d'un sac thermoplastique. Les ailes (21, 22) sont articulées au niveau de la partie supérieure du corps (20) du curseur (10) pour faciliter le moulage de ce dernier au moyen d'un moule simple en deux parties.
PCT/US1991/002154 1991-03-29 1991-03-29 Curseur de fermeture a glissiere a aile en m WO1992017087A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US1991/002154 WO1992017087A1 (fr) 1991-03-29 1991-03-29 Curseur de fermeture a glissiere a aile en m

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1991/002154 WO1992017087A1 (fr) 1991-03-29 1991-03-29 Curseur de fermeture a glissiere a aile en m

Publications (1)

Publication Number Publication Date
WO1992017087A1 true WO1992017087A1 (fr) 1992-10-15

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PCT/US1991/002154 WO1992017087A1 (fr) 1991-03-29 1991-03-29 Curseur de fermeture a glissiere a aile en m

Country Status (1)

Country Link
WO (1) WO1992017087A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5947603A (en) * 1998-08-04 1999-09-07 Reynolds Consumer Products, Inc. Resealable closure mechanism having a slider device and separate housing
US6247844B1 (en) 1998-11-06 2001-06-19 Reynolds Consumer Products, Inc. Resealable slider closure mechanism with separate plow
CN103587743A (zh) * 2012-08-17 2014-02-19 上海金汇通创意设计发展股份有限公司 超窄边折包边机
DE202017106084U1 (de) * 2017-10-06 2019-01-10 Cofresco Frischhalteprodukte Gmbh & Co. Kg Verschlusseinrichtung für einen Beutel

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3103049A (en) * 1960-06-21 1963-09-10 E P S Res & Dev Ltd Slide fasteners and protective containers
US3122807A (en) * 1960-07-22 1964-03-03 Edgar M Ausnit Slider for a pouch and the like
US3220076A (en) * 1963-09-20 1965-11-30 Flexigrip Inc Slide fastener
US3347298A (en) * 1965-10-07 1967-10-17 Minigrip Inc Flexible fastener with unidirectional opening
US3426396A (en) * 1967-03-07 1969-02-11 Leon Ker Laguerre Profiled strip slide fastener
US3462332A (en) * 1965-03-05 1969-08-19 High Polymer Chem Ind Ltd Method of continuously providing a fastener on a thermoplastic film
US3579747A (en) * 1968-02-01 1971-05-25 Eps Research Dev Ltd Strip fasteners
US3660875A (en) * 1968-04-29 1972-05-09 Minigrip Inc Slider for sliding clasp fastener
US3713923A (en) * 1968-02-26 1973-01-30 Minigrip Inc Method of assembling slider with a profiled strip separable fastener
US3790992A (en) * 1971-06-30 1974-02-12 Minigrip Inc Profiled closing members with slide
US3806998A (en) * 1971-02-22 1974-04-30 Minigrip Inc Elastically flexible fastener
US4736451A (en) * 1986-12-22 1988-04-05 Minigrip, Inc. Extruded zipper having combination stabilizing and differential opening means

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3103049A (en) * 1960-06-21 1963-09-10 E P S Res & Dev Ltd Slide fasteners and protective containers
US3122807A (en) * 1960-07-22 1964-03-03 Edgar M Ausnit Slider for a pouch and the like
US3220076A (en) * 1963-09-20 1965-11-30 Flexigrip Inc Slide fastener
US3462332A (en) * 1965-03-05 1969-08-19 High Polymer Chem Ind Ltd Method of continuously providing a fastener on a thermoplastic film
US3347298A (en) * 1965-10-07 1967-10-17 Minigrip Inc Flexible fastener with unidirectional opening
US3426396A (en) * 1967-03-07 1969-02-11 Leon Ker Laguerre Profiled strip slide fastener
US3579747A (en) * 1968-02-01 1971-05-25 Eps Research Dev Ltd Strip fasteners
US3713923A (en) * 1968-02-26 1973-01-30 Minigrip Inc Method of assembling slider with a profiled strip separable fastener
US3660875A (en) * 1968-04-29 1972-05-09 Minigrip Inc Slider for sliding clasp fastener
US3806998A (en) * 1971-02-22 1974-04-30 Minigrip Inc Elastically flexible fastener
US3790992A (en) * 1971-06-30 1974-02-12 Minigrip Inc Profiled closing members with slide
US4736451A (en) * 1986-12-22 1988-04-05 Minigrip, Inc. Extruded zipper having combination stabilizing and differential opening means

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5947603A (en) * 1998-08-04 1999-09-07 Reynolds Consumer Products, Inc. Resealable closure mechanism having a slider device and separate housing
US6247844B1 (en) 1998-11-06 2001-06-19 Reynolds Consumer Products, Inc. Resealable slider closure mechanism with separate plow
CN103587743A (zh) * 2012-08-17 2014-02-19 上海金汇通创意设计发展股份有限公司 超窄边折包边机
DE202017106084U1 (de) * 2017-10-06 2019-01-10 Cofresco Frischhalteprodukte Gmbh & Co. Kg Verschlusseinrichtung für einen Beutel

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