EP0530470A1 - Fermeture à glissière, en particulier pour les sacs en plastique - Google Patents

Fermeture à glissière, en particulier pour les sacs en plastique Download PDF

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Publication number
EP0530470A1
EP0530470A1 EP92111924A EP92111924A EP0530470A1 EP 0530470 A1 EP0530470 A1 EP 0530470A1 EP 92111924 A EP92111924 A EP 92111924A EP 92111924 A EP92111924 A EP 92111924A EP 0530470 A1 EP0530470 A1 EP 0530470A1
Authority
EP
European Patent Office
Prior art keywords
slide
closure
plastic
fastener
channel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP92111924A
Other languages
German (de)
English (en)
Other versions
EP0530470B1 (fr
Inventor
Karl-Heinz Dr. Siegel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ASF Verwaltungs GmbH
Original Assignee
ASF Verwaltungs GmbH
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 ASF Verwaltungs GmbH filed Critical ASF Verwaltungs GmbH
Publication of EP0530470A1 publication Critical patent/EP0530470A1/fr
Application granted granted Critical
Publication of EP0530470B1 publication Critical patent/EP0530470B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65D33/2541—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
    • A44B19/10—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 invention relates to a slide fastener, in particular for plastic bags, consisting of a first fastener tape with at least one first fastener profile, a second fastener tape with at least a second fastener profile, and a slide through which the fastener profiles can be engaged and disengaged, the fastener tapes being made of Are plastic.
  • the invention further relates to a slide for such a slide closure and a plastic bag, a plastic bag or a plastic bag with such a slide closure.
  • slide closures are generally known in practice.
  • the slide in these slide fastener-like slide fasteners is still made of metal.
  • Attempts have already been made with rigid plastics, for example polyacetals, but these slides are unable to securely close the slide fastener tape with the previous S-shaped construction.
  • the end opening of this slide springs back too easily.
  • the slide lock can be closed and opened with the metal slide.
  • end clamps which are also made of metal, are attached to the ends of the slide closure.
  • the ends of the fastener tape can also be spot welded.
  • the metal slide and metal end clamps have the disadvantage that they are not only very heavy, but that the plastic bags or bags equipped with them can only be used or reused (recycled) when the metal parts, i.e. the slide and the end clips have previously been painstakingly removed by hand. These metal parts must then be disposed of separately.
  • the object of the invention is therefore to propose an environmentally friendly slide closure of the type mentioned.
  • the slide is made of plastic, either from the same plastic as the two fastener tapes or from a similar - related - plastic.
  • the plastic bag can also be made of the same or similar - related - plastic.
  • the slide fastener and also the plastic bag to which it is attached can then be recycled in an environmentally friendly manner without the need to sort out individual parts of the slide fastener or the plastic bag and to dispose of them separately.
  • thermoplastic is preferably used.
  • the plastics polyethylene and polypropylene are particularly suitable. These materials can be reused (recycled) in the manner described.
  • the bag is made of polyethylene and the slide is made of polypropylene, this is true, as numerous tests have shown. Both related plastics are olefins, and the relatively low addition of the polypropylene of the pusher to the larger amount of polyethylene in the bag or sack affects the recyclate only insignificantly. Tests have shown that, for example, an admixture of up to 25% polyethylene to polypropylene results in a reprocessable polyethylene regrind with only insignificantly softer properties. Conversely, an addition of polypropylene to polyethylene up to 25% results in only an insignificantly harder regrind.
  • the bag can be ground directly and as a whole and processed into a new plastic part or a new film. This is not only possible with polyethylene and polypropylene, but also with other thermoplastic materials.
  • a further advantageous development is characterized in that a first, continuous channel is provided for the first fastener tape in the slide and that a second channel is provided for the second fastener tape in the slide, which is in the first channel at an angle of at least 20 ° flows.
  • the known sliders for slide closures are made a metal alloy. The end of the slide must compress the slide fastener tapes after entering the slide opening and thus close. For this purpose, relatively high forces must be applied to the slide fastener tapes. In order to be able to exert these relatively high forces on the slide fastener edges, the slide fasteners for slide fasteners have so far been produced from a metal alloy.
  • the innovation creates a slide with which the greatest possible stability and security can be achieved with the smallest possible, smallest possible construction.
  • the second fastener tape is inserted through the second channel at a particularly steep angle into the slide.
  • the first channel can taper in a funnel shape. This taper is provided towards the closing end of the slide. The height of the channel thus decreases towards that end of the slide at which the fastener tapes emerge from the slide in the closed state.
  • the height of the first channel at this exit end can be less than the height of the fastener tapes.
  • the outlet opening for the two closed fastener tapes can be kept so narrow because, despite the relatively large inlet angle between the first and second channels, the fastener tapes require a certain amount of pressure in order to press the fastener profiles of the fastener tapes into one another. Since the plastic used for the fastener tapes is relatively elastic, the height of the outlet opening can be kept very low.
  • This height can be chosen towards zero, so that the closed slide fastener tapes, which in practice can be about 2.2 mm thick (high), bend the outlet opening of the slide and to a certain extent Extend the degree until the resistance of the plastic becomes so strong that it compresses the fastener tapes. The spring action of the slide caused thereby is used to close the fastener tapes.
  • the outlet opening of the slide can even be approximately 2.30 to 2.35 mm with a closed slide fastener tape thickness of 2.2 mm, for example.
  • this end opening is sufficient to securely close the band, because the construction of the slide means that the core or the web is sufficiently rigid to securely close the band, which further enhances the steep angle of incidence of the second band.
  • the slide is not in a stretched position in extended rest position and does not lose its contact pressure when actuated due to a possible flow behavior.
  • the second channel tapers in a funnel shape.
  • the taper is towards the first channel.
  • the cross section of the second channel thus becomes narrower towards the first channel. This increases the functional reliability of the slide.
  • the slide can be essentially cuboid.
  • an end clip is provided at each end of the slide closure, which is essentially U-shaped. At its end edges, it can have mutually pointed, tapering end edges.
  • the end clips are preferably made of the same plastic as the two fastener tapes.
  • end brackets of the injection molding are connected to one another by narrow webs, so that one end bracket each can be demolished.
  • the end clip can be welded on at the end of the bag or at the end of the slide fastener using heating pliers.
  • Fig. 3 shows a plastic bag 1 with a slide fastener 2, which consists of a first fastener tape 3 and a second fastener tape 4 and a slide 5 through which the fastener profiles 6, 7 (Fig. 2) of the fastener tapes 3, 4 in engagement and can be disengaged.
  • End clips 8 are provided at the ends of the fastener tapes 3, 4.
  • end brackets 8 are shown in an enlarged perspective in FIG. 5. They are essentially U-shaped. Several, in the present case four end clips 8 are connected to one another by narrow webs 9. The end brackets 8 and the webs 9 are made as a single injection molded part. One plastic end clip 8 can be torn off.
  • the end bracket 8 is then welded in the manner shown in FIG. 6 by means of heating tongs 10 at the end of the bag 1 onto the slide closure 3, 4.
  • FIG. 4 shows, in a representation corresponding to FIG. 3, in which the same parts are provided with the same reference numerals, a plastic bag 1 with a slide closure 2, which in turn consists of two closure straps 3, 4 and a slide 5.
  • a plastic bag 1 with a slide closure 2 which in turn consists of two closure straps 3, 4 and a slide 5.
  • This version is suitable for lighter applications.
  • the pockets 1, the slide fasteners 2, consisting of fastener tapes 3, 4 and sliders 5, and the end clips 8 are all made of the same or similar plastic.
  • a first, continuous channel 11 for the first fastening tape 3 is provided in the slide 5.
  • a lateral slot 13 adjoins this first channel 11, through which the flag 12 adjoining the first closure band 3 can pass.
  • a second channel 14 for the second closure band 4 is provided in the slide 5.
  • the second channel 14 opens into the first channel 11 at an angle of at least 20 °. In practice, this angle is preferably in the range between 20 and 50 °.
  • a slot 15 also adjoins the second channel 14 laterally in order to allow the passage of the flag 16 adjacent to the second fastener tape 4.
  • the fastener tapes 3, 4 are fed from the right.
  • the fastener tapes 3, 4 emerge from the slide 5 on the left in the closed state.
  • the first channel 11 tapers in a funnel shape, specifically towards the closing end 17 of the slide 5.
  • the height of the first channel at its outlet end 17 can be less than the height of the fastener tapes. In this case, this height is zero, so that the approximately 2.2 mm thick closed slide fastener tape 3.4 bends the end opening of the slide at the outlet end (left in FIG. 1) and stretches to a degree at which the resistance of the Plastic material of the slider 5 becomes so strong that it reliably compresses the fastener tapes 3, 4 and the fastener profiles 6, 7 of the fastener tapes 3, 4 are reliably hooked.
  • the second channel 14 is funnel-shaped towards the first channel 11. This increases functional reliability. For A reliable function of the slider 5 does not matter whether the second sealing tape 4 - as shown in FIG. 1 - lies on the upper surface 18 of the channel 14 or - not shown in the drawing - on its lower surface 19. There is sufficient play for the insertion of the second fastener tape 4 into the funnel-shaped second channel 14. The second fastener tape 4 is reliably drawn into the funnel-shaped second channel 14 and reliably positioned to the first fastener tape.
  • the slide 5 is essentially cuboid.
  • the first channel 11 runs centrally through the longitudinal axis of the slide 5.
  • the second channel 14 begins at the underside of the slide 5 and runs obliquely at an angle to the first channel 11.
  • a projection 21 is provided below the entry point of the first fastener tape 3, which is approximately triangular in cross section.
  • the end clamps 8 have mutually facing, tapering end edges 22 which rest against one another in the initial state shown in FIG. 5.
  • the slot 13 of the first channel 11 and the slot 15 of the second channel 14 face each other.
  • pull tab is connected, which is not shown in the drawing figures.
  • Such pull tabs are already well known. They can be manufactured separately and connected to the slider. But it is also possible to form the pull tab in one piece with the slide 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Slide Fasteners (AREA)
  • Bag Frames (AREA)
EP92111924A 1991-07-26 1992-07-13 Fermeture à glissière, en particulier pour les sacs en plastique Expired - Lifetime EP0530470B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE9109266U 1991-07-26
DE9109266 1991-07-26
DE9110555U DE9110555U1 (fr) 1991-07-26 1991-08-26
DE9110555U 1991-08-26

Publications (2)

Publication Number Publication Date
EP0530470A1 true EP0530470A1 (fr) 1993-03-10
EP0530470B1 EP0530470B1 (fr) 1996-10-16

Family

ID=25958458

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92111924A Expired - Lifetime EP0530470B1 (fr) 1991-07-26 1992-07-13 Fermeture à glissière, en particulier pour les sacs en plastique

Country Status (3)

Country Link
EP (1) EP0530470B1 (fr)
AT (1) ATE144111T1 (fr)
DE (2) DE9110555U1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0862869A2 (fr) * 1997-03-05 1998-09-09 Ykk Corporation Fermeture à glissière en résine synthétique
EP1107054A1 (fr) * 1999-06-04 2001-06-13 Fuji Photo Film Co., Ltd. Boitier d'appareil photo et procede de recyclage
US6487758B2 (en) 2001-03-21 2002-12-03 Eaton Corporation Polypropylene recloseable zipper

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5448807A (en) * 1993-06-10 1995-09-12 Mobil Oil Corporation Plastic end clips fused to plastic zipper
US5664299A (en) * 1996-09-10 1997-09-09 Dowbrands L.P. Reclosable fastener assembly

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3213505A (en) * 1962-09-17 1965-10-26 Ausnit Steven Slider
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
WO1991013566A1 (fr) * 1990-03-07 1991-09-19 Mobil Oil Corporation Methode d'assemblage d'une piece coulissante en plastique a parties multiples et a systeme d'encliquetage avec un fermoir en plastique refermable

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3213505A (en) * 1962-09-17 1965-10-26 Ausnit Steven Slider
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
WO1991013566A1 (fr) * 1990-03-07 1991-09-19 Mobil Oil Corporation Methode d'assemblage d'une piece coulissante en plastique a parties multiples et a systeme d'encliquetage avec un fermoir en plastique refermable

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0862869A2 (fr) * 1997-03-05 1998-09-09 Ykk Corporation Fermeture à glissière en résine synthétique
EP0862869A3 (fr) * 1997-03-05 1998-12-23 Ykk Corporation Fermeture à glissière en résine synthétique
EP1116451A1 (fr) * 1997-03-05 2001-07-18 Ykk Corporation Fermeture à glissière en résine synthétique
EP1107054A1 (fr) * 1999-06-04 2001-06-13 Fuji Photo Film Co., Ltd. Boitier d'appareil photo et procede de recyclage
EP1107054A4 (fr) * 1999-06-04 2001-12-05 Fuji Photo Film Co Ltd Boitier d'appareil photo et procede de recyclage
US6487758B2 (en) 2001-03-21 2002-12-03 Eaton Corporation Polypropylene recloseable zipper

Also Published As

Publication number Publication date
ATE144111T1 (de) 1996-11-15
DE9110555U1 (fr) 1992-10-01
DE59207373D1 (de) 1996-11-21
EP0530470B1 (fr) 1996-10-16

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