EP0183896B1 - Sac à valve en papier multicouche à soufflets latéraux - Google Patents

Sac à valve en papier multicouche à soufflets latéraux Download PDF

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Publication number
EP0183896B1
EP0183896B1 EP85102474A EP85102474A EP0183896B1 EP 0183896 B1 EP0183896 B1 EP 0183896B1 EP 85102474 A EP85102474 A EP 85102474A EP 85102474 A EP85102474 A EP 85102474A EP 0183896 B1 EP0183896 B1 EP 0183896B1
Authority
EP
European Patent Office
Prior art keywords
gusset
tubular member
folded
valve flap
parts
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
EP85102474A
Other languages
German (de)
English (en)
Other versions
EP0183896A2 (fr
EP0183896A3 (en
Inventor
Franz Ahler
Erhard Molsberger
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.)
SVD Verpackungen GmbH
Original Assignee
SVD Verpackungen 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 SVD Verpackungen GmbH filed Critical SVD Verpackungen GmbH
Priority to AT85102474T priority Critical patent/ATE53979T1/de
Publication of EP0183896A2 publication Critical patent/EP0183896A2/fr
Publication of EP0183896A3 publication Critical patent/EP0183896A3/de
Application granted granted Critical
Publication of EP0183896B1 publication Critical patent/EP0183896B1/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
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/14—Valve bags, i.e. with valves for filling
    • B65D31/145—Valve bags, i.e. with valves for filling the filling port being provided in a flat upper sealing-edge

Definitions

  • the invention relates to a multilayer gusseted valve bag according to the preamble of patent claim 1.
  • Such a multilayer side-gusset valve sack which is also referred to as a pinch-bottom valve sack or a staggered gusset bag with a valve, is known from EP-A-43556.
  • this known side gusset valve sack the inner end cut edge of the valve sheet glued into the gusset folded inwards lies inside the sack.
  • Valve bags of this known type are particularly suitable in connection with inner barrier layers based on plastic films or plastic coatings or aluminum laminates, in order to ensure a hermetic seal of the filling material against environmental influences by moisture or oxygen.
  • fillings are packed in such sacks, of which absolute purity is required for further processing.
  • the object of the invention is therefore to provide a sealed pinch-bottom valve sack according to the preamble of claim 1, in which the filling material can come into contact with cut edges made of paper or paper composites of the sack material.
  • valve label is glued to the blank via a folded-over edge strip, the valve strip, as it were, with a double folded hem encloses the part of the side gusset and the adjacent gusset areas of the side walls that have been folded into the sack, so that the cut edge of the valve sheet lies on the inside and is covered by the folded edge which is formed by the first folding over of the edge strip.
  • the product to be protected against any environmental influences can therefore no longer come into undesired contact with the cut edge of the valve sheet.
  • an additional tightness of the valve bag is achieved in that the superimposed plastic coatings of the tube piece and the glued-in valve sheet lying in the upper part of the side gusset, which has been wrapped up on itself, before the staggered ends of the tube piece in the area to be folded through to the Fold-over fold edges are connected to parallel sealed seams.
  • FIG. 1 shows the end of a multi-layer blank 10 to be provided with the valve, which end corresponds to the multi-layer blank of FIG. 1 of European patent publication 43 556 A1.
  • the inner, that is to say top, position of the blank 10 is provided with a plastic film lamination or a lamination made of aluminum laminates.
  • the valve label 7 has a substantially rectangular shape and is provided with a trapezoidal front part, of which the edge strip 8 is folded over, the lateral oblique boundary lines of the trapezoidal part being approximately aligned with the folding lines 15, 16 around which the side wall parts 17, 18 of the later side walls of the blank 10 are turned inwards together with the upper side fold area.
  • the valve label 7 is provided with a plastic coating or the like in the same way as the inner layer of the blank.
  • the fold line 20 of the valve sheet 7 is arranged off-center, so that when the parts of the valve sheet lying on top of each other are folded over when the top seam is formed, better bonding of the valve sheet to a valve tube is achieved.
  • a side gusset is folded inwards at a right angle at the head end, so that a folded-in isosceles trapezoid is formed, the longer base of which lies on the inside due to the front edge of the side gusset and the adjacent edges of the triangular side wall parts 17, 18 of the tube piece folded over and the shorter one Base are formed by the fold edge 24 extending transversely across the side fold, which connects the inwardly folded side fold part to the side fold via a triangular side fold gusset 21.
  • the coated lower edge area of the folded-in side fold and the adjacent side wall parts is glued to the edge area of the valve sheet folded over a first fold line, which is then folded over to the outside by a second fold edge lying in the area of the longer base.
  • the Venilheet 7 can be on a valve label prefabricated and glued into the open "bottom square" preformed by a valve insert so that the cut edge of the blank is flush with the cut edge of the inner tube and the longitudinal center line of the blank is flush with the inner fold edge of the gusset.
  • the valve label 7 receives a double fold inside the sack, so that the cut edge of the valve label inside the sack is covered and, after the second fold, the valve label protrudes outward toward the side fold.
  • the open "bottom square” is closed again by folding the longitudinal center line of the valve sheet 7 and the inner fold of the tube piece projecting at this point, so that the valve label 7 now forms a half tube. This is closed by turning over the head end of the tube piece when forming the bottom seam to form a valve tube.
  • the tube piece is provided with heat sealing seams 11 at the top and bottom before the end regions are turned over.
  • the end regions of the tube piece 9 are then folded around the rides 12 and glued to the adjacent sack walls by means of hot melt adhesive.
  • the longitudinal fold of the valve sheet is slightly off-center, so that in the folded state one side of the valve sheet extends beyond the edge strip 27 over the other side. This type of staggering also ensures that the valve sheet is more securely bonded to a valve tube when the top seam is formed.

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

Claims (2)

1. Sac à valve en papier multicouche à soufflets latéraux avec une couche intérieure de film plastique ou de papier enduit de matière plastique ou analogue, constitué par un flan qui est fermé par repliage des parties latérales et au moyen de lignes de joint médianes longitudinales pour former un élément tubulaire,
avec des soufflets latéraux et avec des lignes de joint de tête et de fond formées en rabattant respectivement sur chaque paroi latérale les couches terminales se recouvrant mutuellement ou échelonnées l'une par rapport à l'autre et en collant ces couches avec les parois latérales,
avec une partie supérieure des soufflets latéraux repliée à angle droit vers l'intérieur en même temps que les parties de paroi latérale triangulaires adjacentes qui est reliée au soufflet latéral par un coin triangulaire du soufflet latéral, et
avec une manchette de valve insérée dans le soufflet latéral plié vers l'intérieur et collée à ce soufflet, caractérisé en ce que les parties marginales intérieures de la manchette de valve (7) enduite de matière plastique sur au moins un côté sont rabattues deux fois et que ces mêmes parties marginales sont collées aux parois latérales (17, 18) de l'élément tubulaire de telle façon que les arêtes de coupe (26) de la manchette de soupape sont tournées vers l'intérieur et sont masquées à l'intérieur de l'élément tubulaire.
2. Sac à valve en papier multicouche selon la revendication 1, caractérisé en ce que les couches d'enduction ou analogues superposées de l'élément tubulaire (19) et de la manchette de valve (7) collée à l'intérieur de la partie supérieure des soufflets latéraux rabattue sur elle-même sont, avant le rabattement des extrémités échelonnées de l'élément tubulaire (19), réunies ensemble dans 15 partie qui doit être rabattue par des cordons de soudure (11) parallèles aux arêtes des plis de rabattement.
EP85102474A 1984-12-05 1985-03-05 Sac à valve en papier multicouche à soufflets latéraux Expired - Lifetime EP0183896B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85102474T ATE53979T1 (de) 1984-12-05 1985-03-05 Mehrlagiger seitenfaltenventilsack aus papier.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3444370 1984-12-05
DE3444370 1984-12-05

Publications (3)

Publication Number Publication Date
EP0183896A2 EP0183896A2 (fr) 1986-06-11
EP0183896A3 EP0183896A3 (en) 1988-08-17
EP0183896B1 true EP0183896B1 (fr) 1990-06-20

Family

ID=6251969

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85102474A Expired - Lifetime EP0183896B1 (fr) 1984-12-05 1985-03-05 Sac à valve en papier multicouche à soufflets latéraux

Country Status (3)

Country Link
EP (1) EP0183896B1 (fr)
AT (1) ATE53979T1 (fr)
DE (1) DE3578331D1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8628387U1 (de) * 1986-10-24 1986-12-04 Bischof Und Klein Gmbh & Co, 4540 Lengerich Kreuz- oder Klotzbodenventilsack

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4344558A (en) * 1980-07-07 1982-08-17 St. Regis Paper Company Pinch bottom valve bag
EP0075181B1 (fr) * 1981-09-07 1986-08-13 Fischer & Krecke Sac à valve, en papier pour l'emballage de produits poudreux ou granuleux

Also Published As

Publication number Publication date
EP0183896A2 (fr) 1986-06-11
ATE53979T1 (de) 1990-07-15
EP0183896A3 (en) 1988-08-17
DE3578331D1 (de) 1990-07-26

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