EP0434447B1 - Vorrichtung zur lösbaren Verbindung zweier gegenüberliegender Oberflächenelemente und Verfahren zur Herstellung dieser Vorrichtung - Google Patents

Vorrichtung zur lösbaren Verbindung zweier gegenüberliegender Oberflächenelemente und Verfahren zur Herstellung dieser Vorrichtung Download PDF

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Publication number
EP0434447B1
EP0434447B1 EP90314084A EP90314084A EP0434447B1 EP 0434447 B1 EP0434447 B1 EP 0434447B1 EP 90314084 A EP90314084 A EP 90314084A EP 90314084 A EP90314084 A EP 90314084A EP 0434447 B1 EP0434447 B1 EP 0434447B1
Authority
EP
European Patent Office
Prior art keywords
sheet
male
connecting members
surface elements
assembling device
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.)
Expired - Lifetime
Application number
EP90314084A
Other languages
English (en)
French (fr)
Other versions
EP0434447A1 (de
Inventor
Hans Dieter Flieger
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of EP0434447A1 publication Critical patent/EP0434447A1/de
Application granted granted Critical
Publication of EP0434447B1 publication Critical patent/EP0434447B1/de
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
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B19/00—Slide fasteners
    • A44B19/02—Slide fasteners with a series of separate interlocking members secured to each stringer tape
    • A44B19/08—Stringers arranged side-by-side when fastened, e.g. at least partially superposed stringers

Definitions

  • the present invention concerns an assembling device to form a releasable bond between two adjacent surface elements comprising at least two connecting members, respectively, one male and one female, placed in facing relation to each other for reciprocal engagement when said surface elements are assembled together; the invention also concerns a method for manufacturing the device.
  • All the closing devices of this kind to be used in packaging and which can be opened and closed again at will to protect the content of the package from the outside atmosphere comprise connecting members which are either extruded simultaneously with a wrapper film or sheet, or they are first injection molded and thereafter fixedly bonded to the wrapper sheet or film by glueing or welding.
  • WO-A-8802311 discloses a fastenable product, according to the preamble of claim 1, having a co-operable protrusion and cavity and which may be co-operable with a protrusion and cavity of another product.
  • the product is suitable as a binder for paper sheet with holes, but alternatively it can form part of a constructional toy.
  • connecting members When the connecting members are co-extruded with the sheet or film, these connecting members are formed of interjoining ribs provided along the edges of the sheet which is thereafter folded to place the joining members in mutual registration. The folded sheet is then welded transversally to form bags which are then separated from each other by splitting along the transversal welding lines.
  • This well known closure system can be formed only during extrusion of the sheet. Because of overthickness due to the ribs, it is difficult to store the material in the form of large rolls. This is because the volume of a roll with ribs, given a length of film or sheet, is substantially greater than the corresponding volume of a same length of film or sheet taken alone without ribs.
  • the packer has difficulty making the bags starting from the sheet material and thus has to use individual prefabricated bags. This is the reason why generally such bags are not used for conditioned packing, because they are not well suited to automation for which one preferably uses sheet wrapper material and directly forms bags around the product to be packaged.
  • An object of the present invention is precisely to disclose a solution of this sort.
  • the present invention has for an object an assembling device for forming a releasable bond between two adjacent surface elements according to the characterising part of claim 1. It has also for an object a method of manufacturing this device according to claim 2.
  • this assembling device resides in its manufacturing convenience, given that it can be brought about at any time from a simple film or sheet material without requiring additional material. For instance it can be formed simultaneously with the manufacture of the films or sheets or it can be formed at a later opportunity; this enables to make for instance a bag which can be opened and closed tight again during packaging of the product, this being without imposing production costs exceeding that of an ordinary bag with a welded joint of the type used until now. Since the sheet is not locally overthickened and the connecting members engage reciprocally with one another, the sheets in which the connecting members are formed can easily be stored into rolls. Naturally, as will be seen hereafter, the use of the assembling device is nor limited to the sealing of bags.
  • Fig. 1 is a perspective view of an embodiment of this assembling device.
  • Fig. 2 is a perspective view of a variant of fig. 1.
  • Fig. 3 is a perspective view of another variant of fig. 1.
  • Fig. 4 is a cross-sectional side view of the profile of the sealing members of the assembling device.
  • Fig. 5 is a view in perspective of still another variant of this profile.
  • Fig. 6 is a cross-sectional view of a variant of the connecting members of the device.
  • Fig. 7a and 7b are cross-sectional side views of a last variant of profile of the sealing members shown in disassembled and assembled condition, respectively.
  • Fig. 8 is a perspective view of one particular use of the device.
  • the assembling devise illustrated in fig. 1 comprises male and female connecting members, 1 and 2 respectively, of films or sheets, respectively 3 and 4, to be assembled together.
  • the sheet 3 is provided with a row of male connecting members 1 and the sheet 4 is provided with a row of female connecting members 2.
  • the distance that separates, in a row, the male connecting members corresponds to that distance which separates the female connecting members.
  • the male and female connecting members, 1 and 2 respectively are formed by shaping or embossing the sheets 3 and 4, respectively.
  • the sheets are of thermoformable polymers and embossing is preferably achieved by hot-forming using methods to be disclosed hereafter in more detail.
  • the sheets 3 and 4 can be thin, i.e. between 40 and 100 »m.
  • the connecting members 1 and 2 have complementary cross-sectional dimensions which mate together and fit into each other.
  • the sheets 3 and 4 are withdrawn from each other with sequential disengagement of male and female connectors.
  • the male and female connecting members are subject to strain and deformation in the plane of the sheets which puts them out of alignment and results into a wedging effect between the respective side surfaces of said connecting members which resists to the disengagement.
  • This effect reinforces the retaining back pressure effect which results from the disconnecting pull.
  • the combined effects explain why the binding strength of the assembling device is so effective.
  • This assembly of the two sheets along the row of connecting members is also sufficiently tight to provide, under ambient pressure, a barrier appropriate to protect the content of a bag for instance from the influence of the outside.
  • sheet should be understood as including all more or less flexible materials of any given thickness.
  • the resistance of the assembly to separation of the sheets and also the sealing capacity through the line of connecting means can be increased by placing, as illustrated for instance in fig. 2, two rows of connecting means 5 and 6 in parallel, the connecting members of a row being staggered relative to that of another row.
  • the total rubbing surface is increased, hence the force for separating sheets 7 and 8 from each other is also increased.
  • the connecting members of rows 5 and 6 are also given a rectangular form, so the tightness is improved due to the staggered configuration.
  • the assembling device does not provide full air-tightness and it can be desirable in some cases to achieve impervious seals, namely for vacuum packaging.
  • the two sheets 3 and 4 forming a bag can be sealed by a welding S externally to the line of connecting members; these members can be identical to that with reference numerals 1 and 2 in fig. 1 for example, and in parallel thereto.
  • the sheets 3 and 4 are cut between the welding line S and the line of connecting members 1 and 2, which gives access to the inside of the bag; afterwards, the bag can be closed again using the connecting members, the content of the bag being thus preserved until entirely used up.
  • the variant illustrated in fig. 4 comprises male and female connecting members, 9 and 10 respectively, having a frustoconical or frustopyramidal shape.
  • the binding elements can preferably be used in combination with a pressure sensitive adhesive to be coated on the joining surfaces of the male and female sealing members 9 and 10.
  • An adhesive of this kind can be, for instance, an ethylene/vinylacetate copolymer such as Elvax® sold by the Du Pont Company.
  • the variant of fig. 5 illustrates the fitting of a cylinder-shaped male element 19 into a polygonal-shaped cross-sectional print 20, a square in this example, forming the female member.
  • Using connecting elements in which the shape of the male members is different from that of the female members can facilitate the evacuation of the air upon pressing the members together.
  • the female member could also be shaped cylindrically and the male member have a polygonal cross-section fitting into the female circle.
  • the respective size of the transverse cross-section of both male and female connecting means will be selected to ensure that some deformation thereof be achieved upon fitting the two together.
  • the thickness of the sheet used for forming the male embossments must be sufficient to resist the effort. If the material of the sheet is too thin, its resistance can be enhanced by folding the sheet 26 on itself in the area where the connecting members are formed as shown in fig. 6.
  • At least the male connecting members are formed by embossing the sheet material which is essentially of thermoformable polymer.
  • the simplest method to achieve embossing includes heating the area to be raised to forming temperature, placing this area in registration with a stamping matrix having in negative the shape of the desired relief, subjecting the sheet to depression on the matrix side of the sheet, this depression being sufficient to drive the softened sheet material into the hollow print in the matrix, cooling the area of the formed sheet and removing it from the matrix.
  • This method is simple and fast.
  • the suction which drives the softened thermoformable material into the matrix prints can be replaced by using a punch which deforms the material and drives it into the matrix.
  • the female connecting means can be made similarly in the cases of the variants of fig. 1 to 4 and 5.
  • the embossed connecting elements can be made by cold forming of a deformable sheet material.
  • the assembling device disclosed here need not be limited to using sheet materials for forming bags or tray lids for instance as illustrated in fig. 8.
  • the elements of the device to be assembled can be in the form of a strip 31 whose width only slightly exceeds that of the embossed area, the strip being thereafter welded or glued to a surface 32 to be joined to another one.
  • a paper bag can be provided with a system of this kind.
  • the strip element carrying the female connecting members can be akin to the strip 31 the surface on which it is to be glued being first punched with holes.
  • This strip element carrying the female members can also be molded from a strip with thickness greater than that of strip 31.
  • the sheet material to be used for making at least the male connecting members is either in single film form or in multilayer form, i.e. comprising several polyolefin layers in combination with another or more different polymers.
  • the male and female elements, respectively 29 and 30 are complementarily shaped and formed of circular cross-sectional elements with a frustoconical section 29a, 30a.
  • the pressure makes the tip 20b to shrink and pass through the bottleneck 30c of the female element in order to come into its meshed state as illustrated in fig. 7b.
  • any of the foregoing variants are combined with a heat-reactive adhesive which enables one eventually to separate the assembled surface elements by peeling off at least the surface element in form of a sheet or film.
  • This type of closure is generally known as a "peel-seal" and can be achieved with a blend of two components sold by the Du Pont Company under Trade names Surlyn® and Bynel®; the proportions of components in the blend depend on the properties sought after.
  • one of the surfaces to be jointed is coated with an appropriated blend of Surlyn® and Bynel® and applied to the other surface; the assembly is thereafter heated.
  • the heating step can advantageously be combined with the thermoforming of the embossed connecting elements. With a fixture of this kind, the welding line S of fig. 3 is not necessary. For removing the two assembled surface elements, the adhesive force between them must be overcome. Afterwards, the two surface elements can be reclosed due to the male and female connecting elements which will match together.
  • the present assembling device is usable to close pouches, bags and to ensure the fastening of flexible lids over container of more or less rigid texture; hence it is useful as fastening means in all appliances where a releasable bond is necessary.

Landscapes

  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Bag Frames (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Handcart (AREA)
  • Making Paper Articles (AREA)
  • Connection Of Plates (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Sink And Installation For Waste Water (AREA)
  • Seal Device For Vehicle (AREA)
  • Slide Fasteners, Snap Fasteners, And Hook Fasteners (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Liquid Crystal (AREA)
  • Packages (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Clamps And Clips (AREA)
  • Adhesive Tapes (AREA)

Claims (2)

  1. Vorrichtung zum lösbaren Verbinden zweier aneinanderliegender Flächenelemente (3, 4), wobei die aneinanderliegenden Flächenelemente jeweils mehrere eindringende und aufnehmende Verbindungsglieder aufweisen, die einander gegenüberliegen und ineinandergreifen,wenn die Flächenelemente zusammengebaut sind, wobei die Flächenelemente aus einem warmformbaren Bahn- oder Folienmaterial hergestellt sind, von dem Teile zur Bildung der eindringenden und aufnehmenden Verbindungsglieder vertieft sind, wobei die eindringenden Verbindungsglieder (1) einen geschlossenen Umfang und die Querschnitte der eindringenden und der aufnehmenden Verbindungsglieder zusammenpassende Formen von im wesentlichen komplementärer Größe haben,
    dadurch gekennzeichnet,
    daß wenigstens das die eindringenden Verbindungsglieder (1) tragende Flächenelement (3) mehrere Lagen aus wenigstens zwei unterschiedlichen Polymeren enthält, und daß das bahn- oder folienförmige Material eines der Flächenelemente einen in Wärme reagierenden Klebstoff zur Bildung einer lösbaren Befestigung zwischen den eindringenden und den aufnehmenden Gliedern (1, 2) enthält .
  2. Verfahren zur Herstellung der Vorrichtung nach Anspruch 1 mit den folgenden Schritten:
    (a) Erhitzen wenigstens eines Flächenbereichs einer warmformbaren Polymerbahn auf die Erweichungstemperatur;
    (b) Plazieren des erhitzten Bereichs zwischen einer Prägeform, bei der ein dieser Fläche zu erteilendes Profil als Negativkopie ausgebildet ist, und einem Stempel mit einem dem negativen Profil der Prägeform entsprechenden erhabenen Profil;
    (c) Treiben des Stempels in die Form zur Verformung des erhitzten Materials;
    (d) Unterwerfen des erhitzten Materials einem verminderten Druck von der Prägeformseite her;
    (e) Abkühlen der Bahn unter deren Warmverformungstemperatur;
    (f) Entfernen der Stempels von der Prägeform;
    (g) Entfernen des vertieften Bereichs der Bahn von der Prägeform und vor, während oder nach der Durchführung der Schritte (a) bis (g);
    (h) Beschichten einer der Bahnen mit einem in Wärme reagierenden Klebstoff;
    (i) Aufbringen dieser Bahn auf die andere Bahn; und
    (j) Erhitzen der Anordnung von Bahnen zur Bildung einer abziehbaren Versiegelung.
EP90314084A 1989-12-21 1990-12-20 Vorrichtung zur lösbaren Verbindung zweier gegenüberliegender Oberflächenelemente und Verfahren zur Herstellung dieser Vorrichtung Expired - Lifetime EP0434447B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4590/89 1989-12-21
CH459089 1989-12-21

Publications (2)

Publication Number Publication Date
EP0434447A1 EP0434447A1 (de) 1991-06-26
EP0434447B1 true EP0434447B1 (de) 1995-05-24

Family

ID=4278931

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90314084A Expired - Lifetime EP0434447B1 (de) 1989-12-21 1990-12-20 Vorrichtung zur lösbaren Verbindung zweier gegenüberliegender Oberflächenelemente und Verfahren zur Herstellung dieser Vorrichtung

Country Status (11)

Country Link
EP (1) EP0434447B1 (de)
JP (2) JPH04119209A (de)
AT (1) ATE122983T1 (de)
AU (1) AU632192B2 (de)
CA (1) CA2032699A1 (de)
CZ (1) CZ647890A3 (de)
DE (1) DE69019701T2 (de)
DK (1) DK0434447T3 (de)
ES (1) ES2072402T3 (de)
HU (1) HU213588B (de)
PL (1) PL165182B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103079749A (zh) * 2010-09-10 2013-05-01 宝马股份公司 具有第一和第二构件以及公和母固定元件的构件连接体

Families Citing this family (26)

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Publication number Priority date Publication date Assignee Title
US5447772A (en) * 1990-11-21 1995-09-05 E. I. Du Pont De Nemours And Company Reclosable packaging seal and methods relating thereto
CA2079043A1 (en) * 1992-04-04 1993-10-05 Alfred Schmeck Method and apparatus for the manufacture of a resealable package
JP3259861B2 (ja) * 1992-08-31 2002-02-25 ジャサイ・ゾルタン・カズマー 緩衝保護装置
JPH07187242A (ja) * 1993-06-01 1995-07-25 K Jasai Z 緩衝保護装置
JPH0776368A (ja) * 1993-06-01 1995-03-20 K Jasai Z 緩衝保護装置
US5944425A (en) * 1997-05-22 1999-08-31 Forman; Harold M Packages with unitarilly formed resealable closure
DE19748791C2 (de) * 1997-11-05 1999-08-19 Eckold Vorrichtung Verfahren zum Fügen mindestens zweier Blechteile
DE19859042A1 (de) † 1998-12-21 2000-06-29 Convenience Food Sys Bv Wiederverschließbare Kunststoffverpackung mit mindestens einer Noppe
US7097066B2 (en) 2002-01-29 2006-08-29 The Glad Products Company Plate container with detachable cover
US7097063B2 (en) 2002-01-29 2006-08-29 The Glad Products Company Plate container with detachable cover
JP4790980B2 (ja) * 2003-12-25 2011-10-12 株式会社ダイコー カバー付きパッキン
US20060108905A1 (en) 2004-11-25 2006-05-25 Samsung Electronics Co., Ltd. Mold for fabricating barrier rib and method of fabricating two-layered barrier rib using same
CN101490460A (zh) * 2006-07-07 2009-07-22 布卢斯科普钢铁有限公司 接合金属板产品
JP5179160B2 (ja) * 2007-12-20 2013-04-10 東洋アルミエコープロダクツ株式会社 金属箔構造体
EP2076099A1 (de) * 2007-12-27 2009-07-01 Nederlandse Organisatie voor toegepast- natuurwetenschappelijk onderzoek TNO Vorrichtung aus Stapelfolien
CN101884456B (zh) * 2010-07-15 2012-02-29 张卫 吸盘式拉链
JP2012034941A (ja) * 2010-08-10 2012-02-23 C I Kasei Co Ltd 嵌合具および嵌合具付き袋体
JP5463398B2 (ja) * 2012-09-21 2014-04-09 東洋アルミエコープロダクツ株式会社 金属箔構造体
US9604761B2 (en) 2012-09-28 2017-03-28 S. C. Johnson & Son, Inc. Storage bag with features that facilitate sealing and unsealing of the bag
US11634253B2 (en) * 2012-09-28 2023-04-25 S. C. Johnson & Son, Inc. Storage bag with colored lips
US20140093194A1 (en) * 2012-09-28 2014-04-03 S.C. Johnson & Son, Inc. Storage Bag With Lips Shaped To Facilitate Unsealing Of The Bag
JP6436314B2 (ja) * 2012-09-28 2018-12-12 エス．シー． ジョンソン アンド サン、インコーポレイテッド ディンプル特性を備える保存袋
ITMO20140290A1 (it) * 2014-10-16 2016-04-16 Lettieri Fabio Lattina per bevande perfezionata
MX2020011349A (es) * 2018-04-27 2021-07-02 Brentwood Ind Inc Instalación mecánica para asegurar láminas y metodo relacionado.
EP4194357A1 (de) * 2021-12-10 2023-06-14 Fameccanica.Data S.p.A. Reissverschlussstreifen für einen flexiblen beutel und verfahren und vorrichtung zur herstellung von wiederverschliessbaren flexiblen beuteln
EP4194356A1 (de) * 2021-12-10 2023-06-14 Fameccanica.Data S.p.A. Wiederverschliessbarer flexibler beutel und verfahren und vorrichtung zur herstellung von wiederverschliessbaren flexiblen beuteln

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103079749A (zh) * 2010-09-10 2013-05-01 宝马股份公司 具有第一和第二构件以及公和母固定元件的构件连接体
CN103079749B (zh) * 2010-09-10 2016-01-13 宝马股份公司 具有第一和第二构件以及公和母固定元件的构件连接体

Also Published As

Publication number Publication date
JPH04119209A (ja) 1992-04-20
PL165182B1 (pl) 1994-11-30
ATE122983T1 (de) 1995-06-15
AU632192B2 (en) 1992-12-17
EP0434447A1 (de) 1991-06-26
PL288400A1 (en) 1991-07-29
DE69019701T2 (de) 1996-01-11
ES2072402T3 (es) 1995-07-16
CZ647890A3 (en) 1996-03-13
HU908411D0 (en) 1991-07-29
JPH0745071U (ja) 1995-12-19
DK0434447T3 (da) 1995-08-07
HUT58637A (en) 1992-03-30
CA2032699A1 (en) 1991-06-22
AU6827890A (en) 1991-06-27
JP2588372Y2 (ja) 1999-01-06
DE69019701D1 (de) 1995-06-29
HU213588B (en) 1997-08-28

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