EP0285940B1 - Sac avec un fond formé en repliant vers l'intérieur des parties de la paroi du sac formées sous forme de pattes repliables et étant renforcé par des feuilles de recouvrement - Google Patents

Sac avec un fond formé en repliant vers l'intérieur des parties de la paroi du sac formées sous forme de pattes repliables et étant renforcé par des feuilles de recouvrement Download PDF

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Publication number
EP0285940B1
EP0285940B1 EP88104908A EP88104908A EP0285940B1 EP 0285940 B1 EP0285940 B1 EP 0285940B1 EP 88104908 A EP88104908 A EP 88104908A EP 88104908 A EP88104908 A EP 88104908A EP 0285940 B1 EP0285940 B1 EP 0285940B1
Authority
EP
European Patent Office
Prior art keywords
bag
cover sheet
sack
covering sheet
reinforced
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
EP88104908A
Other languages
German (de)
English (en)
Other versions
EP0285940A2 (fr
EP0285940A3 (en
Inventor
Hans Peter Dipl.-Ing. Walser
Burkhard Dipl.-Ing. Lahrmann
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.)
NORDENIA INTERNATIONAL AG TE STEINFELD, BONDSREPUB
Original Assignee
NORDENIA VERPACKUNGSWERKE AG
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 NORDENIA VERPACKUNGSWERKE AG filed Critical NORDENIA VERPACKUNGSWERKE AG
Publication of EP0285940A2 publication Critical patent/EP0285940A2/fr
Publication of EP0285940A3 publication Critical patent/EP0285940A3/de
Application granted granted Critical
Publication of EP0285940B1 publication Critical patent/EP0285940B1/fr
Anticipated expiration legal-status Critical
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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
    • B65D31/142—Valve bags, i.e. with valves for filling the filling port being formed by folding a flap connected to a side, e.g. block bottoms

Definitions

  • the invention relates to a sack, in particular a sack made from a flat tube section, preferably made of plastic film, with sack bottoms, preferably elongated, hexagonal sack bottoms, which are formed by folding the sack walls inwards from folding flaps and which are each reinforced with a one-piece, strip-shaped cover sheet glued on the outside are, the side facing the bag bottom is the regular adhesive surface serving for an adhesive connection.
  • the cover sheets for reinforcing the bag bottoms are preferably glued to the bag bottom or otherwise adhere to the bag bottoms.
  • a sack known from DE-OS 14 86 470 there are weld seams at an angle to one another in order to form a gap which is to serve as a filling opening.
  • the regular adhesive surface offered to the cover sheet is reduced by the filling opening and thus the adhesion of the cover sheet is weakened.
  • each sack bottom is formed by folding the side walls of the sack inwards, so that not always a flat sack bottom is created, but that side folds of the sack also extend into the sack bottom area because the folding flaps also have these side folds .
  • Such side folds can be formed, for example, by relatively sharp-edged extruder edges on flat tube sections during extrusion, and these side folds then also have a sack made from the flat tube section.
  • the invention has for its object to improve a sack of the type mentioned in such a way that secure cover sheet adhesion is ensured even in the event of folds occurring in the sack bottom area.
  • the cover sheet has an extension section at least at one of its two ends as an additional adhesive surface for gluing to the bag bottom, that the extension sections are tongues to which the cover sheet tapers at the end, that each tongue has a transverse to End edge extending in the longitudinal direction of the cover sheet has that each tongue is formed in each case by recesses made symmetrically to the longitudinal axis of the cover sheet and that each recess has edges running in an arc.
  • the extension sections can be provided with a coating of adhesive or the like in a manner known per se and are thus available as additional adhesive surfaces of the cover sheet.
  • the extension sections advantageously extend essentially in the longitudinal central region of the cover sheet, under which folds occur most frequently in the bag bottom.
  • Both cover sheets of the sack are preferably designed in the manner according to the invention, but it is it is conceivable that the two sack bottoms of a sack are designed differently because, for example, one of the sack bottoms is to serve as a storage surface, while the other sack bottom is to be closed, for example, only temporarily and is essentially used to remove the sack filling.
  • the extension sections are tongues to which the cover sheet tapers at the end, each tongue preferably having a cross has end edge extending to the longitudinal direction of the cover sheet.
  • the tongue-shaped extension sections form a connecting web between adjacent cover sheets during the manufacture of the cover sheets until the individual cover sheets are finally cut off from the material strip, which web is severed when the individual cover sheets are cut off, the respective end edge of the cover sheet being formed. Maintaining the connection of the cover sheets during production until the last possible moment facilitates in particular the transport of these cover sheets through a production line and thus the continuous processing of the cover sheets.
  • the cover sheet is formed in one piece, and each tongue of the cover sheet is each formed by recesses made symmetrically to the longitudinal axis of the cover sheet.
  • the tongues are thus not separately attached to the cover sheet, which would require additional steps, but the cover sheet is formed from a mostly rectangular sheet of material, the corners of which are removed by recesses, so that the tongues of the cover sheet form and the cover sheet to the Tongues tapered, and thus also on the mostly acute-angled sack bottoms without the cover sheet in unwanted areas over the Bag bottom protrudes.
  • the recesses each have edges running in an arc, preferably hyperbolic edges, which is also particularly advantageous in the production of the cover sheet.
  • the recesses can be made continuously, for example, by rollers reinforced with cutting or punching tools, the curve of the recess edges being favorable for the rolling process of these rollers.
  • a sack is known from DE-GM 84 37 911.1 with a valve inserted between the folding flaps of at least one of the sack bottoms from a flat-folded valve hose, to which an insertion pocket is assigned, into which the valve hose end protruding over the sack bottom can be inserted after folding, whereby the cover sheet protrudes beyond the bottom of the sack and can be folded over together with the protruding valve hose end and inserted into the insertion pocket.
  • the valve tube can advantageously be pushed onto a filler neck when filling the sack. After the filling process, the end of the valve hose is folded over and inserted into the insertion pocket, so that the valve is sealed in the folding area. The valve hose end is stiffened by the cover sheet projecting above the sack bottom, so that the valve hose end remains in the insertion pocket and does not slip out.
  • a sack 1 is schematically indicated, which has a sack bottom 2.
  • the sack bottom 2 is formed by folding the sack walls inward from cross flaps 3 to 6 and reinforced with an outer cover sheet 7 applied on the outside.
  • the cover sheet 7 is glued to the folding flaps 3 to 6, for which purpose adhesive is applied to the bag bottom 2.
  • the cover sheet 7 is shown partially folded up, so that an area marked with crosses 8 can be seen under the cover sheet 7 on the bag bottom 2 to which the glued cover sheet is applied.
  • the folding flaps 3, 4 on the narrow sides of the bag bottom 2 have folds 9, 10, which are continuations of the side folds 11, 12 of the bag wall, which arise, for example, from the extruder edges of the extruder when the tube section from which the bag 1 is made is produced .
  • the folds 9, 10 run in the area of the longitudinal axis of the bag bottom 2.
  • the cover sheet 7 has at its ends, as additional adhesive surfaces, extension sections 13, which allow an enlargement of the area marked with crosses 8 and thus a better adhesion of the cover sheet 7 Ensure in the area of the folds 9, 10.
  • the extension sections 13 are designed as tongues and are delimited by recesses 14 in the cover sheet 7.
  • FIG. 2 shows a section of a sack which has a sack bottom 2 which essentially corresponds to that in FIG. 2 corresponds to the bag bottom shown, but which additionally has a valve 15, which consists of a flat-folded valve hose 16, from which a valve hose end protrudes beyond the bag bottom 2.
  • a valve 15 which consists of a flat-folded valve hose 16, from which a valve hose end protrudes beyond the bag bottom 2.
  • an insertion pocket not recognizable in FIG. 2, into which the projecting end of the valve hose can be inserted after being folded over.
  • the cover sheet 7 reinforcing the bag bottom 2 also largely covers the projecting valve hose end with a projecting cover sheet section which, like the cover sheet 7 according to FIG. 1, has an extension section 13 designed as a tongue, which is delimited by recesses 14.

Landscapes

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

Claims (2)

  1. Sac, en particulier sac réalisé dans une partie de tuyau plat, de préférence dans une feuille en matière plastique, comportant des fonds, de préférence allongés, hexagonaux, qui sont formés par repliage vers l'intérieur des parois du sac faites de pattes repliables et qui sont renforcés chacun par une feuille de couverture d'une seule pièce, en forme de bande, collée de l'extérieur, dont le côté tourné vers le fond du sac est une surface adhésive régulière servant d'assemblage collé, caractérisé en ce que la feuille de couverture présente, au moins à l'une de ses deux extrémités, un prolongement (13) servant de surface adhésive supplémentaire pour un collage avec le fond du sac, en ce que les prolongements (13) sont des languettes vers lesquelles se rétrécit à son extrémité la feuille de couverture (7), en ce que chaque languette possède un bord terminal transversal à la direction longitudinale de la feuille de couverture (7), en ce que chaque languette est formée par des évidements (14) symétriques à l'axe longitudinal de la feuille de couverture (7) et en ce que chaque évidement (14) présente des bords s'étendant suivant un arc.
  2. Sac suivant la revendication 1, caractérisé en ce que les bords de chaque évidement (14) s'étendent à peu près suivant une hyperbole.
EP88104908A 1987-04-08 1988-03-26 Sac avec un fond formé en repliant vers l'intérieur des parties de la paroi du sac formées sous forme de pattes repliables et étant renforcé par des feuilles de recouvrement Expired - Lifetime EP0285940B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8705223U 1987-04-08
DE8705223U DE8705223U1 (fr) 1987-04-08 1987-04-08

Publications (3)

Publication Number Publication Date
EP0285940A2 EP0285940A2 (fr) 1988-10-12
EP0285940A3 EP0285940A3 (en) 1989-09-20
EP0285940B1 true EP0285940B1 (fr) 1993-03-10

Family

ID=6806846

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88104908A Expired - Lifetime EP0285940B1 (fr) 1987-04-08 1988-03-26 Sac avec un fond formé en repliant vers l'intérieur des parties de la paroi du sac formées sous forme de pattes repliables et étant renforcé par des feuilles de recouvrement

Country Status (2)

Country Link
EP (1) EP0285940B1 (fr)
DE (2) DE8705223U1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3941300A1 (de) * 1989-12-14 1991-06-20 Nordenia Verpackung Sack, vorzugsweise aus kunststoffolie
FR2781718B1 (fr) 1998-07-28 2000-10-13 Flexico France Sarl Procede de fabrication de sacs a fond plat et machine pour sa mise en oeuvre
DE202009007915U1 (de) 2009-06-05 2009-08-20 Worff, Herwig, Dipl.-Ing. Sack
BR102016014915B1 (pt) * 2016-06-23 2019-06-11 Starlinger & Co Gesellschaft Mbh Embalagem tipo saco ou sacaria
RS61076B1 (sr) * 2017-12-14 2020-12-31 Starlinger & Co Gmbh Vreća za rasuti materijal

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1486470A1 (de) * 1964-04-03 1969-06-04 Lissner & Co Geb Aus Kunststoffolie bestehender Sack mit Kreuzboden
DE1922826C3 (de) * 1969-05-05 1974-02-21 Windmoeller & Hoelscher, 4540 Lengerich Aus einem Schlauchabschnitt aus thermoplastischer Kunststoffolie hergestellter Sack mit einer Kreuzbodenfaltung sowie Verfahren und Vorrichtung zu seiner Herstellung
DE2323726A1 (de) * 1973-05-10 1974-11-21 Windmoeller & Hoelscher Kreuzbodensack
DE3336731C2 (de) * 1983-10-08 1995-12-07 Nordenia Verpackung Gmbh Vorzugsweise aus Kunststoffolie gefertigter Sack, insbesondere Ventilsack
DE3508115A1 (de) * 1985-03-07 1986-09-11 Nordenia Kunststoffe Peter Mager KG, 2841 Steinfeld Sack mit einem faltboden und mit einer im bereich des faltbodens befindlichen befuelloeffnung

Also Published As

Publication number Publication date
DE8705223U1 (fr) 1987-09-03
EP0285940A2 (fr) 1988-10-12
DE3878955D1 (de) 1993-04-15
EP0285940A3 (en) 1989-09-20

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