EP0345930B1 - Verschliessbarer Beutel - Google Patents

Verschliessbarer Beutel Download PDF

Info

Publication number
EP0345930B1
EP0345930B1 EP19890304035 EP89304035A EP0345930B1 EP 0345930 B1 EP0345930 B1 EP 0345930B1 EP 19890304035 EP19890304035 EP 19890304035 EP 89304035 A EP89304035 A EP 89304035A EP 0345930 B1 EP0345930 B1 EP 0345930B1
Authority
EP
European Patent Office
Prior art keywords
heat sealed
zipper
pouch
edge portions
closable pouch
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
Application number
EP19890304035
Other languages
English (en)
French (fr)
Other versions
EP0345930A1 (de
Inventor
Akira Oyama
Susumu Niwa
Yoshiji Moteki
Toru Ichikawa
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.)
Hosokawa Yoko KK
Original Assignee
Hosokawa Yoko KK
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
Priority claimed from JP1988064217U external-priority patent/JPH0618898Y2/ja
Priority claimed from JP1989000310U external-priority patent/JPH0617723Y2/ja
Application filed by Hosokawa Yoko KK filed Critical Hosokawa Yoko KK
Priority to AT89304035T priority Critical patent/ATE74323T1/de
Publication of EP0345930A1 publication Critical patent/EP0345930A1/de
Application granted granted Critical
Publication of EP0345930B1 publication Critical patent/EP0345930B1/de
Expired 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
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5805—Opening or contents-removing devices added or incorporated during package manufacture for tearing a side strip parallel and next to the edge, e.g. by means of a line of weakness
    • 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
    • B65D2575/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes or webs of flexible sheet material, e.g. in folded wrappers
    • B65D2575/52—Details
    • B65D2575/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D2575/586—Opening or contents-removing devices added or incorporated during package manufacture with means for reclosing
    • 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
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/28—Articles or materials wholly enclosed in composite wrappers, i.e. wrappers formed by associating or interconnecting two or more sheets or blanks
    • B65D75/30—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding

Definitions

  • the present invention relates to a closable pouch for containing a material such as a retort food.
  • a closable pouch formed with a zipper or fastener means is known.
  • the pouch has a generally rectangular shape, and has heat sealed portions at both side edge portions, and a top opening portion whose inner surfaces are formed with the zipper means.
  • a top heat sealed portion is formed for sealing the top opening before use.
  • a portion between the top sealed edge portion and the zipper portion is manually cut to remove the top edge portion. If any material such as retort food remains within the pouch, the zipper portions are pressed together to close the cut opening.
  • the pouch for containing the retort food requires an oxygen blocking function and thermal resistivity.
  • the pouch is formed of a laminated film consisting of an aluminium foil and a non-oriented polypropylene, or the lamination of an oriented nylon film and a non-oriented polypropylene film.
  • Such laminated films have sufficient strength, and therefore, large force is required for manually tearing the pouch in order to discharge material packed therein.
  • a user has to remove the top heat sealed portion, and then has to open the zipper means.
  • a cutter such as a knife or a pair of scissors must be used for removing the top sealed portion. This is troublesome, if there is no cutter readily available.
  • a tape formed of an oriented plastics material has been proposed which is provided at a position between the top heat sealed portion and the zipper portion.
  • the oriented tape may be easily cut in one direction, so that the tape portion may presumably undergo smooth cutting for removing the top heat sealed portion.
  • productivity of such pouches is lowered since the tape has to be stuck onto that portion, and the resultant pouch becomes costly.
  • the cutting line in the tape may be curved, and the zipper portion may be disadvantageously cut during the manual cutting of the tape.
  • a closable pouch comprising: a rectangular front laminated sheet, a rectangular rear laminated sheet, the front and rear laminated sheets having confronting side edge portions heat sealed together and confronting upper edge portions heat sealed together, and zipper means extending parallel to the upper heat sealed edge portion for selectively opening and closing an upper opening defined after removal of the upper heat sealed edge portions, the zipper means defining an effective zipper portion along its length; is characterised in that: at least one notch is formed in each of the side heat sealed edge portions; and in that a surface roughened zone is formed on the front and rear laminated sheets, extends between the notches and is positioned between the upper heat sealed edge portion and the zipper means.
  • An advantage of the present invention is the provision of a pouch in which the top heat sealed portion can be easily removed without using a cutter, and without damage to the zipper means.
  • the opening length of the zipper means is smaller than the transverse length of the pouch.
  • the surface roughened zone is provided at a position between the upper heat sealed edge portion and the zipper means, and since the surface roughened zone is continguous with the notches formed at the side heat sealed edge portions, when tearing the pouch at one of the notches, the pouch is easily tearable along the surface roughened zone without any damage to the zipper means, and such tearing can be made without using any cutter.
  • a first example according to this invention is shown in Figures 1 and 2.
  • a closable pouch 1 according to the first embodiment is of a self-standing type pouch for containing therein a material such as a retort food.
  • the pouch 1 includes two rectangular laminated sheets 2A, 2B serving as front and rear walls, respectively and a bottom wall 3 formed also of a laminate sheet. Prior to the material injection into the pouch 1, the bottom wall 3 is folded so that a folding line 3a is provided, which folding line 3a is positioned between the front and rear walls 2A and 2B.
  • Each confronting side edge portions of the front and rear walls 2A and 2B are heat sealed together for providing side heat sealed portions 4a and 4b.
  • V-notches 15a and 15b are formed.
  • the bottom wall 3 is heat sealed with bottom edge portions of the front and rear walls for forming a bottom heat sealed portion 5.
  • Top edges of the front and rear walls 2A and 2B define a top opening 6 prior to the material injection. The top edges are heat sealed together after material injection for providing a top heat sealed portion 7.
  • a zipper or fastener 8 is provided at a position adjacent the top sealed portion 7.
  • the zipper 8 extends in transverse direction of the pouch, i.e., extends from one side heat sealed portion 4a to the other side sealed portion 4b in parallel with the top sealed portion 7.
  • a surface roughened zone 9 having a small width extends in parallel with the zipper 8 and at a position closer to the top heat sealed portion than the zipper 8.
  • the surface roughened zone 9 extends between the V-notches 15a and 15b. Clearly these V-notches are positioned between the zipper 8 and the top heat sealed portion 6.
  • the zipper 8 is provided at inner surfaces of the front and rear walls 2A and 2B.
  • the zipper 8 includes an engaging rib 8a integrally provided at the inner surface of one of the front and rear walls 2A and 2B, and an engaging groove (not shown) integrally provided at the inner surface of remaining one of the rear and the front walls 2B and 2A.
  • the rib 8a is engageable with the engaging groove upon depression for packing a content and these are disengageable from each other upon application of force for discharging the content from the pouch.
  • the rib and engaging groove are provided independent of the front and rear walls and the rib and the engaging groove are stuck to the walls as shown in Fig. 4.
  • Each of the front and rear sheet walls 2A and 2B is formed of the laminate film which includes an outer polyester film layer 10 having a thickness of 12 microns, an adhesive layer 11 formed on the layer 10, an aluminum layer or foil 12 having a thickness of 9 microns formed on the layer 11, a second adhesive layer 13 formed on the layer 12 and an inner cast polypropylene film layer 14 having a thickness of 60 microns formed on the layer 13.
  • the rib 8a of the zipper 8 is integrally provided at the inner layer 14.
  • the inner layer 14 is subjected to surface roughening treatment by an abrasive roller (not shown) for forming the surface roughened zone 8 having the small width.
  • the surface roughned zone 8 reduces mechanical strength of the laminate sheets 2A and 2B for facilitating cutting of the sheet therealong, yet maintaining sufficient strength and sealability, since the surface roughening treatment is effected only on the internal cast polypropylene layer 14.
  • the surace roughened zone can be formed at the outer layer, i.e., at the polyester layer 10.
  • tearing force is manually applied to one of the V-notches 15a and 15b so as to initiate tearing at the notch.
  • This tearing force is propagated along the surface roughened zone 9 and the tearing reaches the other V-notch.
  • the tear-cutting is not transmitted to the zipper portion 8, but the tearing is concentrated only along the surface roughned portion 9 positioned outside the zipper 8. Accordingly, the zipper portion 8 does not undergo any damage.
  • the zipper 8 is manually opened for taking out the content packed in the pouch 1. If the residual content is intended to be packed in the pouch 1, the zipper 8 is simply closed.
  • a zipper or fastener 8′ includes an engaging rib piece 8A stuck to an inner layer 14 of a front sheet wall 2A′, and an engaging groove piece 8B stuck to an inner layer 14′ of a rear sheet wall 2B′.
  • the engaging rib piece 8A is provided with a rib 8a′ which is engageable with an engaging groove 8b′ provided at the engaging groove piece 8B. It goes without saying that such pieces 8A and 8B are available in the first embodiment.
  • additional heat sealed portions 17a and 17b are formed.
  • Each of the additional heat sealed portions 17a and 17b integrally join the front and rear walls 2A′ and 2B′ together at positions close to the side heat sealed portions 4a and 4b and close to the top heat sealed portion 7, so that parts of the rib 8a′ and the engaging groove 8b′ are also joined together. Therefore, a limitted part of the zipper 8 having a length L functions as an effective zipper portion.
  • the additional heat sealed portions 17a and 17b define slanting sealed edge lines 18a and 18b.
  • Each of the sealed edge lines 18a and 18b extends between a point 19 and a point 20.
  • the point 19 is on the side sealed edge portion 4 and is positioned more remote from the top edge than the zipper 8, and the point 20 is positioned on the top heat sealed portion 7.
  • each of the additional heat sealed portions has a triangular shape as shown, still providing an effective zipper portion having the length L at the non heat sealed parts.
  • Such additional heat sealed portions are not necessarily provided symmetrically. Instead, the additional heat sealed portion can be provided at one confronting part of the front and the rear walls as far as the single additional heat sealed portion can provide the effective zipper portion having the length L.
  • the zipper 8 having effective length L is provided which length is smaller than the transverse length of the pouch, and the length L is controllable by controlling the area of the additional heat sealed portion. Therefore, the closing operation of the zipper can be easily achieved. Further, in case of retort process, generally, hear is applied to the pouch, and such heat may provide thermal deformation of the zipper 8 to thereby degrade engaging capability between the rib 8a′ and the groove 8b′. However, in the second embodiment, since the effective zipper lenth L is smaller than the transversal length of the pouch, or the effective zipper length L is controllable, the thermal deformation or contraction does not severely affect the engaging capability of the zipper.
  • the top heat sealed portion can be easily removed by manually cutting the pouch along the surface roughened zone without using any cutter. Further, since the cutting is achieved exclusively on the surface roughened zone, the zipper positioned adjacent to the top heat sealed portion is not damaged during removal of the top heat sealed portion. Therefore, after removal of the top beat sealed portion the zipper can provide its inherent opening and closing function.
  • the effective zipper length is smaller than the transversal length of the pouch, closing operation of the zipper can be promptly achieved, and the inherent zipper operation can be provided even if a minute thermal deformation occurs at the zipper portion, since the thermal deformation does not severely affect the zipper or fastening fuction in the small length zipper (a small length member does provide a small length expansion or contraction).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Packages (AREA)

Claims (5)

1. Ein verschließbarer Beutel enthaltend: eine rechteckige vordere Mehrschichtfolie (2A), eine rechteckige hintere Mehrschichtfolie (2B), wobei die vorderen und hinteren Mehrschichtfolien (2A und 2B) gegenüberstehende Seitenrandabschnitte (4a, 4b) haben, die heiß zusammengesiegelt sind und gegenüberstehende obere Randabschnitte (7) haben, die heiß zusammengesiegelt sind, und
   eine Reißverschlußeinrichtung (8, 8′), die sich parallel zum oberen heißgesiegelten Randabschnitt (7) erstreckt, zum wahlweise Öffnen und Schließen einer oberen Öffnung, die nach dem Entfernen des oberen heißgesiegelten Randabschnitts (7) definiert ist, wobei die Reißverschlußeinrichtung (8, 8′) einen wirksamen Reißverschluabschnitt entlang seiner Länge definiert;
   dadurch gekennzeichnet, daß
   mindestens eine Kerbe (15) an jeder Seite des heißgesiegelten Randabschnitts (4) angebildet ist; und daß eine oberflächenaufgerauhte Zone (9) an den vorderen und hinteren Mehrschichtfolien (2A und 2B) angebildet ist die, sich zwischen den Kerben (15) erstreckt und zwischen dem oberen heißgesiegelten beschnitt (7) und der Reißverschlußeinrichtung (8, 8′) angeordnet ist.
2. Verschließbarer Beutel nach Anspruch 1, bei dem die oberflächenaufgerauhten Zonen (9) auf den inneren Oberflächen jeder Mehrschichtfolie (2A und 2B) angebildet sind.
3. Verschließbarer Beutel nach Anspruch 1, bei dem die oberflächenaufgerauhten Zonen (9) auf den äußeren Oberflächen jeder Mehrschichtfolie (2A und 2B) angebildet sind.
4. Verschließbarer Beutel nach einem der vorangehenden Ansprüche, weiterhin enthaltend einen zusätzlichen heißgelsiegelten beschnitt (17), der an einem oberen Teil der vorderen und hinteren Mehrschichtfolien (2A, 2B) vorgesehen ist, zum Reduzieren der wirksamen Reißverschlußlänge der Reißverschlußeinrichtung (8, 8′), wobei der zusätzliche heißgesiegelte Abschnitt (17) einen heißgesiegelten Bereich einnimmt, der einen Teil des oberen heißgesiegelten Randabschnitts (7) und einen Teil der Reißverschlußeinrichtung (8, 8′) enthält.
5. Verschließbarer Beutel nach einem der vorangehenden Ansprüche, wobei jede der vorderen und hinteren Mehrschichtfolien (2A und 2B) eine nicht-orientierte Polypropylenfilmschicht und eine Aluminiumfolienschicht enthält.
EP19890304035 1988-05-16 1989-04-24 Verschliessbarer Beutel Expired EP0345930B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89304035T ATE74323T1 (de) 1988-05-16 1989-04-24 Verschliessbarer beutel.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP64217/88U 1988-05-16
JP1988064217U JPH0618898Y2 (ja) 1988-05-16 1988-05-16 レトルト食品用再閉自在包装袋
JP310/89U 1989-01-06
JP1989000310U JPH0617723Y2 (ja) 1989-01-06 1989-01-06 レトルト食品用再閉自在包装袋

Publications (2)

Publication Number Publication Date
EP0345930A1 EP0345930A1 (de) 1989-12-13
EP0345930B1 true EP0345930B1 (de) 1992-04-01

Family

ID=26333267

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890304035 Expired EP0345930B1 (de) 1988-05-16 1989-04-24 Verschliessbarer Beutel

Country Status (4)

Country Link
EP (1) EP0345930B1 (de)
DE (1) DE68901110D1 (de)
ES (1) ES2032108T3 (de)
GR (1) GR3004837T3 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6719678B1 (en) 2000-02-28 2004-04-13 C.L.P Industries Ltd. Recloseable retort pouch
EP2433788A1 (de) 2010-09-22 2012-03-28 Amcor Flexibles Transpac N.V. Vorgeschnittenes mehrschichtiges Verpackungsmaterial
US8153214B2 (en) 2004-11-29 2012-04-10 Alcan Packaging Italia S.R.L. Multilayer laminated film for packages

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5221144A (en) * 1989-01-27 1993-06-22 T W Kutter, Inc. Resealable packages and method and apparatus for producing same
US5254073A (en) 1990-04-27 1993-10-19 Kapak Corporation Method of making a vented pouch
US5059036A (en) * 1990-04-27 1991-10-22 Kapak Corporation Vented pouch arrangement and method
US5205649A (en) * 1990-08-29 1993-04-27 Trigon Packaging Corporation Leakproof packaging
US5174658A (en) * 1991-07-12 1992-12-29 The Procter & Gamble Company Self-expanding and reclosable flexible pouch
US5184896A (en) * 1991-10-11 1993-02-09 The Procter & Gamble Company Self-expanding flexible pouch including improved extensible stay to maximize opening
FR2719826A1 (fr) * 1994-05-10 1995-11-17 Chaygneaud Dupuy Francois Dispositif d'ouverture facile et contrôlée d'un sachet souple et sachet ainsi obtenu.
US5709479A (en) * 1996-09-06 1998-01-20 Kapak Corp. Bag construction for distributing material
US5971613A (en) * 1997-04-11 1999-10-26 Kapak Corp. Bag constructions having inwardly directed side seal portions
US7476030B1 (en) * 2000-09-18 2009-01-13 Kabushiki Kaisha Hosokawa Yoko Fastener bag and fastener device
US6375037B1 (en) 2000-10-10 2002-04-23 Kapak Corporation Bag construction for distributing material
US6487758B2 (en) 2001-03-21 2002-12-03 Eaton Corporation Polypropylene recloseable zipper
KR100385472B1 (ko) * 2001-05-07 2003-05-27 주식회사 뉴팩코리아 리필용 팩
US7073674B2 (en) * 2003-09-10 2006-07-11 Playtex Products, Inc. Resealable nurser liner
KR100642119B1 (ko) 2006-02-22 2006-11-13 박사룡 개량된 재밀폐가능한 지퍼 스트립
KR101043022B1 (ko) * 2010-06-08 2011-06-21 플레어 플렉시블 패키징 코포레이션 직선형 절취특성을 갖는 파우치 및 제조방법 그리고 그 파우치 제조장치

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3625270A (en) * 1970-04-17 1971-12-07 Milorad Skendzic Pilferproof package
US3768725A (en) * 1971-11-11 1973-10-30 Nat Distillers Chem Corp Breathable, sterilizable and peelable pouch and method of manufacture thereof
US3913789A (en) * 1974-02-13 1975-10-21 United States Banknote Corp Fluid container of the flexible wall capsule type
JPS58160251A (ja) * 1982-03-03 1983-09-22 旭化成株式会社 密封小分け袋及びその製法

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6719678B1 (en) 2000-02-28 2004-04-13 C.L.P Industries Ltd. Recloseable retort pouch
US8153214B2 (en) 2004-11-29 2012-04-10 Alcan Packaging Italia S.R.L. Multilayer laminated film for packages
EP2433788A1 (de) 2010-09-22 2012-03-28 Amcor Flexibles Transpac N.V. Vorgeschnittenes mehrschichtiges Verpackungsmaterial
WO2012038111A1 (en) 2010-09-22 2012-03-29 Amcor Flexibles Transpac Nv Pre-cut multilayer packaging material

Also Published As

Publication number Publication date
DE68901110D1 (de) 1992-05-07
ES2032108T3 (es) 1993-01-01
EP0345930A1 (de) 1989-12-13
GR3004837T3 (de) 1993-04-28

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