EP0755862B1 - Récipient en papier étanche avec dispositif d'ouverture - Google Patents

Récipient en papier étanche avec dispositif d'ouverture Download PDF

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Publication number
EP0755862B1
EP0755862B1 EP19960305541 EP96305541A EP0755862B1 EP 0755862 B1 EP0755862 B1 EP 0755862B1 EP 19960305541 EP19960305541 EP 19960305541 EP 96305541 A EP96305541 A EP 96305541A EP 0755862 B1 EP0755862 B1 EP 0755862B1
Authority
EP
European Patent Office
Prior art keywords
bottom board
hole
top wall
container
board
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
EP19960305541
Other languages
German (de)
English (en)
Other versions
EP0755862A3 (fr
EP0755862A2 (fr
Inventor
Nobushige c/o Jujo Con-Tech Co. Ltd. Yasui
Koji c/o Liquid Packaging Ctr. Ichimaru
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.)
Nippon Paper Industries Co Ltd
Jujo Paper Co Ltd
Original Assignee
Nippon Paper Industries Co Ltd
Jujo Paper Co Ltd
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 Nippon Paper Industries Co Ltd, Jujo Paper Co Ltd filed Critical Nippon Paper Industries Co Ltd
Publication of EP0755862A2 publication Critical patent/EP0755862A2/fr
Publication of EP0755862A3 publication Critical patent/EP0755862A3/fr
Application granted granted Critical
Publication of EP0755862B1 publication Critical patent/EP0755862B1/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
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/42—Details of containers or of foldable or erectable container blanks
    • B65D5/72—Contents-dispensing means
    • B65D5/74—Spouts
    • B65D5/746—Spouts formed separately from the container
    • B65D5/747—Spouts formed separately from the container with means for piercing or cutting the container wall or a membrane connected to said wall
    • B65D5/749—Spouts formed separately from the container with means for piercing or cutting the container wall or a membrane connected to said wall a major part of the container wall or membrane being removed from the container after the opening

Definitions

  • the present invention relates to a tightly sealed paper container provided with a simplified and improved opening device.
  • a tightly sealed paper container provided with an opening device is known from Japanese Utility Model Publication No. Hei 6-27542.
  • a through hole 6 is formed in a top wall 7 of a container body 1 formed of a container material 2 of a paperboard 3 laminated with thermoplastic resin layers 4 and 5 provided on the front and rear surfaces thereof.
  • a bottom board 8 made of synthetic resin and having a through hole 9 as large as or smaller than the through hole 6 is bonded to the outer surface of the top wall 7 such that the through hole 9 in the bottom board 8 is positioned within the through hole 6 in the top wall 7.
  • the container is opened simply by means of pulling up the top board 11 from the bottom board 8, part of the barrier film 14 bonded to the top surface of the coupling projection 12 of the top board 11 being torn away to open the through hole 6 in the top wall 7 of the container body 1, so that the container can be opened.
  • the lower tip 15 of the bottom board 8 is separated like an apron from the upper surface of the top wall 7, the lower tip 15 makes liquid cut off sharply, thereby preventing liquid from dropping.
  • the means of separating the lower tip 15 of the bottom board 8 is merely excluding the lower tip 15 from the bonding (by melt) to the upper surface of the top wall 7, the degree of freedom of being deformed to be separated of the lower tip 15 is low, and thus the separation of the lower tip 15 can be insufficient and, during a pouring-out operation, the content can trickle down the container to drop.
  • an object of the present invention is to provide a tightly sealed paper container with an opening device with which, by increasing the separation of the lower tip of a bottom board, liquid can be cut off sharply and dropping of liquid can be prevented.
  • a tightly sealed paper container with an opening device comprising a through hole formed in a top wall of a container body formed of a container material of a paperboard laminated with thermoplastic resin layers provided on the front and rear surfaces thereof; a bottom board on the outer surface of the top wall made of synthetic resin and having a through hole smaller that the through hole in the top wall, the bottom board being bonded by melt and pressure contact to the outer surface of the top wall such that the through hole in the bottom board is positioned within the through hole in the top wall; a top board made of synthetic resin and having a coupling projection to be coupled into the through hole in the bottom board, the top board being superposed on the bottom board with the coupling projection coupled into the through hole in the bottom board; and a barrier film covering the through hole in the top wall and laminated on the inner surface of the top wall, the barrier film being sealed to the inner surface of the top wall with respect to the circumference of the through hole and
  • the degree of freedom of deformation of the portion between the two notches at the lower tip is high.
  • the non-bonded portion having the high degree of freedom of deformation is deformed greatly, and the portion is separated at an angle of 15° to 30° from the upper surface of the top wall.
  • a tightly sealed paper container with an opening device characterised in that the boundary line between the bonded portion and the non-bonded portion which links the innermost end of the two notches provided in the bottom board is in an arc shape.
  • the non-bonded portion is deformed more greatly than in prior art arrangements, the portion is separated more from the upper surface of the top wall, and the tip of the non-bonded portion which is separated is deformed into an arc shape with respect to the direction of pouring out of a liquid, which makes liquid cut off more sharply, and which prevents more effectively liquid from trickling down the container to drop.
  • a method for producing a tightly sealed paper container with an opening device characterised in that, in the process of bonding by melt and pressure contact using ultrasonic sealing means the bottom board of the opening device to the outer surface of the top wall of the container body having the through hole closed by the barrier film from the inner side of the container with the top board not superposed on the bottom board, the bottom board is 0.4 mm to 0.6 mm thick and that the bottom board is bonded by melt and pressure contact with a sealing pressure of 2.5 kg/cm 2 to 4.0 kg/cm 2 .
  • the opening device has the necessary strength as an opening device and, at the same time, when the opening device is bonded to the top wall of the container body, the amount of projection of the opening device from the top wail is not so much as to cause trouble on the device in forming a carton and in filing up and tightly sealing a carton. Further, by making the sealing pressure 2.5 kg/cm 2 to 4.0 kg/cm 2 , the bottom board is bonded to the top wall without fail and the non-bonded portion is separated or upturned without fail.
  • a through hole 6 is provided by stamping in a top wall 7 of a container body 1 formed of a container material 2 which itself is formed of a laminated body in which layers 4 and 5 made of thermoplastic synthetic resin such as polyethylene and polypropylene are laminated on the outermost layers of the front and rear surfaces of a paper board 3 and, as necessary, an aluminium foil layer or a synthetic resin layer of barrier property is laminated on a substrate of container material 2.
  • the container material 2 is 0.4 mm to 0.5 mm thick.
  • a barrier film 14 made of, for example, aluminium foil is sealed with heat on the circumference of the through hole 6 on the inner surface of the top wall 7 so as to cover the through hole 6 in the top wall 7.
  • a bottom board 8 and a top board 11 forming an opening device are attached to the outer surface of the top wall 7 in the following way.
  • the bottom board 8 and the top board 11 are formed of thermoplastic synthetic resin.
  • the bottom board 8 and the top board 11 are integrally formed by being coupled with each other with a hinge 21 at one end.
  • the bottom board 8 is formed therein with a through hole 9 smaller in size than the through hole 6 formed in the top wall 7.
  • a tubular projection 10 having an outer diameter which matches with an inner diameter of the through hole 6 in the top wall 7 provided on the circumference of the through hole 9.
  • the height of the tubular projection 10 is substantially equal to the thickness of the container material 2.
  • the top board 11 is formed with a coupling projection 12 in a downward direction coupled into the through hole 9 in the bottom board 8.
  • the bottom board 8 and the top board 11 can be folded up along a hinge portion 21.
  • the coupling projection 12 is coupled into the tubular projection 10, that is, the through hole 9 in the bottom board 8, and the top surface of the coupling projection 12 is substantially flush with the top surface of the tubular projection 10.
  • the bottom board 8 is bonded to the top wall 7 of the container body 1 by melt and pressure contact.
  • Two notches 16 and 17 are provided at the lower portion 15, which is positioned on the lower side when bonded and centred so as to be symmetrical with respect to an imaginary vertical line drawn through the centre of one side of the container.
  • the portion between the notches 16 and 17 is a non-bonded portion 18.
  • the boundary line 20 between bonded portion 19 and non-bonded portion 18, which links the innermost end of the two notches 16 and 17, describes an arc shape.
  • the tubular projection 10 of the bottom board 8 is coupled into the through hole 6 in the top wall 7, bonding by melt and pressure contact is conducted, and thus the bottom board 8 is bonded to the outer surface of the top wall 7.
  • the non-bonded portion 18 of the bottom board 8 is formed between the two notches 16 and 17, the degree of freedom of deformation of the non-bonded portion 18 is high.
  • the upper surface of the bonded portion 19 of the bottom board 8 is pressed hard by pressurisation accompanying the bonding of the bottom bard 8 to the top wall 7.
  • the angle ⁇ between the upturned tip portion and the upper surface of top wall 7 has a value from 15° to 30°.
  • the top board 11 is folded up along the hinge portion 21, and the top board 11 is superposed on the bottom board 8 with the coupling projection 12 of the top board 11 coupled into the through hole 9 in the bottom board 8. Then the top surface of the coupling projection 12 and the top surface of the tubular projection 10 of the bottom board 8 are bonded to the barrier film 14 provided on the inner surface of the top wall 7.
  • the present embodiment is described in the following further detail.
  • a synthetic resin sheet that is 0.4 mm to 0.6 mm thick is used. If the thickness of the bottom board 8 is less than 0.4 mm, the opening device does not have the necessary strength as an opening device. Furthermore, since the fixed form of the opening device cannot be maintained, it is difficult to handle the opening device when, for example, attached to the container body 1, which results in low manufacturing efficiency. If the thickness of the bottom board 8 is more than 0.6 mm, since the opening device itself is thick, and the amount of projection from the top wall 7 becomes large when attached to the top wall 7 of the container body 1, this may cause trouble on the device in forming a carton and in filling up and tightly sealing a formed carton.
  • the sealing pressure when the bottom board 8 is bonded to the top wall 7 of the container body 1 by melt and pressure contact is 2.5 kg/cm 2 to 4.0 kg/cm 2 .
  • the sealing pressure means the air pressure of an air cylinder with which the bottom board 8 is pressurised when the bottom board 8 is bonded with pressure to the top wall 7.
  • the sealing pressure is less than 2.5 kg/cm 2 , it is difficult to achieve sufficient separation of the non-bonded portion 18 of the bottom board 8. If the sealing pressure is more than 4.0 kg/cm 2 , the pressurised portion of the bottom board 8 becomes very thin and, in an extreme case, the bottom board 8 is torn at this pressurised portion.
  • the two notches 16 and 17 provided at the lower portion 15 of the bottom board 8 are required to be of sufficient depth for proper separation of the non-bonded portion 18 of the bottom board 8.
  • the depth of the two notches 16 and 17 is 1.5 mm to 2.5 mm from the periphery of the bottom board 8 toward the through hole 9.
  • the separation of the non-bonded portion 18 of the bottom board 8 is too small to achieve the effect of cutting off liquid sharply when the content of the container is poured out. If it is more than 2.5 mm, the separation of the non-bonded portion 18 of the bottom board 8 is too large, and the amount of projection from the top wall 7 becomes large when the bottom board 8 is attached to the top wall 7 of the container body 1, which may cause trouble on the device in forming a carton and in filling up and tightly sealing a formed carton.
  • the boundary line 20 between the bonded portion 19 and the non-bonded portion 18 may be displaced slightly toward the periphery of the bottom board 8 from the innermost portions of the notches 16 and 17.
  • the distance from the periphery of the bottom board 8 to the boundary line 20 is preferably within the range of 1.5 mm to 2.5 mm.
  • the width of the bonded portion 19 which forms the boundary line 20 in order to prevent the displacement of the boundary line 20 toward the through hole 9 from the innermost portions of the notches 16 and 17 even in cases of possible subtle misalignment of the bottom board 8 and a sealing device when the bottom board 8 is sealed with the top wall 7 of the container body 1, the width is preferably enough for absorbing the misalignment of the bottom board 8 and the sealing device. It is preferable that the width of the bonded portion 19 is 20% or more of the distance from the periphery of the bottom board 8 to the periphery of the through hole 9 but, even in this case, the position of the boundary line 20 must be within the range of 1.5 mm to 2.5 mm from the periphery of the bottom board 8.
  • a non-bonded portion at the lower tip of a bottom board bonded to the upper surface of a top wall of a container body is separated with an angle of 15° to 30° between the upturned tip portion and the upper surface of the top wall, there is such an effect that, when the content is poured out, by the non-bonded portion separated at the lower tip of the bottom board, the content is cut off sharply, thereby preventing liquid without fail from trickling down the container to drop.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cartons (AREA)

Claims (3)

  1. Récipient en papier hermétiquement fermé à dispositif d'ouverture, comprenant un trou débouchant (6) formé dans une paroi de dessus (7) d'un corps de récipient (1) formé en une matière de récipient (2) d'un carton (3) laminé à couches de résine thermoplastique (4, 5) fournies sur les surfaces avant et arrière de celui-ci ; un carton de fond (8) sur la surface externe de la paroi de dessus (7) réalisé en résine synthétique et ayant un trou débouchant (9) plus petit que le trou débouchant (6), ledit carton de fond (8) étant collé par fusion et contact par pression à la surface externe de la paroi de dessus (7); de telle sorte que le trou débouchant (9) dans le carton de fond (8) soit positionné à l'intérieur du trou débouchant (6) dans la paroi de dessus (7), un carton de dessus (11) réalisé en résine synthétique et ayant une projection de couplage (12) destinée à être couplée dans le trou débouchant (9) dans le carton de fond (8), le carton de dessus (11) étant superposé au carton de fond (8) avec ladite projection de couplage (12) couplée dans le trou débouchant (9) dans le carton de fond (8) ; et une pellicule barrière (14) couvrant le trou débouchant (6) dans la paroi de dessus (7) et laminée sur la surface interne de la paroi de dessus (7), ladite pellicule barrière (14) étant scellée sur la surface interne de la paroi de dessus (7) par rapport à la circonférence du trou débouchant (6) et sur la surface de dessus de la projection de couplage (12) du carton de dessus (11) couplée dans le trou débouchant (9) dans le carton de fond (8) ;
       dans lequel ledit carton de fond (8) a une projection tubulaire droite (10) ayant un diamètre externe qui correspond à un diamètre interne dudit trou débouchant (6) aménagé dans la paroi de dessus (7), la périphérie interne de ladite projection tubulaire (10) fournissant ledit trou débouchant (9) dans le carton de fond (8) dont le diamètre correspond à ladite projection de couplage (12), et la surface de dessus de la projection de couplage (12) et la surface de dessus de la projection tubulaire (10) sont sensiblement à niveau avec la surface interne de la paroi de récipient quand la projection de couplage (12) est engagée dans la projection tubulaire (10), et dans lequel deux encoches (16, 17) sont aménagées dans le carton de fond (8) de manière à être symétriques par rapport à une ligne verticale imaginaire tracée à travers le centre d'un côté du récipient et de manière à définir une partie de bord (15) du carton de fond, la partie de bord (15) étant positionnée de manière à constituer le bec inférieur du carton de fond quand le récipient est utilisé pour verser un liquide ; la partie entre lesdites encoches (16, 17) étant exclue du collage du carton de fond (8) à la paroi de dessus (7) du corps de récipient (1) de telle sorte que le bec de la partie non collée (18) du carton de fond (8) saille vers le haut depuis la surface supérieure de la paroi de dessus (7) du récipient à un angle de 15°à 30°.
  2. Récipient en papier hermétiquement fermé à dispositif d'ouverture selon la revendication 1, caractérisé en ce que la ligne de démarcation (20) entre la partie collée (19) et la partie non collée (18) qui relie l'extrémité la plus interne des deux encoches (16, 17) aménagées dans le carton de fond (8) est en forme d'arc.
  3. Procédé de production d'un récipient en papier hermétiquement fermé à dispositif d'ouverture selon la revendication 1, caractérisé en ce que, dans le processus de collage par fusion et contact par pression en utilisant un dispositif de scellement aux ultrasons du carton de fond (8) du dispositif d'ouverture avec la surface externe de la paroi de dessus (7) du corps de récipient (1) ayant le trou débouchant (6) fermé par la pellicule barrière (14) à partir du côté interne du récipient avec le carton de dessus (11) non superposé sur le carton de fond (8); le carton de fond (8) d'une épaisseur de 0,4 mm à 0,6 mm est collé par fusion et contact par pression avec une pression de scellement de 2,5 kg/cm2 à 4,0 kg/cm2.
EP19960305541 1995-07-27 1996-07-29 Récipient en papier étanche avec dispositif d'ouverture Expired - Lifetime EP0755862B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP19206195 1995-07-27
JP192061/95 1995-07-27
JP19206195 1995-07-27

Publications (3)

Publication Number Publication Date
EP0755862A2 EP0755862A2 (fr) 1997-01-29
EP0755862A3 EP0755862A3 (fr) 1997-11-26
EP0755862B1 true EP0755862B1 (fr) 2002-02-13

Family

ID=16284978

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19960305541 Expired - Lifetime EP0755862B1 (fr) 1995-07-27 1996-07-29 Récipient en papier étanche avec dispositif d'ouverture

Country Status (2)

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EP (1) EP0755862B1 (fr)
DE (1) DE69619173T2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7878353B2 (en) 2004-08-20 2011-02-01 Tetra Laval Holdings & Finance Sa Opening device for a sealed package containing a pourable food product

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19635088C2 (de) * 1996-08-30 2002-01-10 Sig Combibloc Gmbh Wiederverschließbares Element für Getränkepackungen
DE19947296C2 (de) 1999-10-01 2003-06-05 Sig Combibloc Gmbh Mit einem wiederschließbaren Ausgießer versehene Flachgiebelverbundpackung und Verfahren zu ihrer Herstellung
DE60229832D1 (de) * 2002-04-12 2008-12-24 Tetra Laval Holdings & Finance Versiegelte Packung für flüssige Nahrungsmittel

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0627542Y2 (ja) * 1990-02-28 1994-07-27 日本製紙株式会社 開口装置付きの密閉紙容器
JP2581795Y2 (ja) 1992-09-03 1998-09-24 武田薬品工業株式会社 仕切付紙箱

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7878353B2 (en) 2004-08-20 2011-02-01 Tetra Laval Holdings & Finance Sa Opening device for a sealed package containing a pourable food product

Also Published As

Publication number Publication date
DE69619173T2 (de) 2002-08-14
EP0755862A3 (fr) 1997-11-26
EP0755862A2 (fr) 1997-01-29
DE69619173D1 (de) 2002-03-21

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