EP0285940A2 - 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
EP0285940A2
EP0285940A2 EP88104908A EP88104908A EP0285940A2 EP 0285940 A2 EP0285940 A2 EP 0285940A2 EP 88104908 A EP88104908 A EP 88104908A EP 88104908 A EP88104908 A EP 88104908A EP 0285940 A2 EP0285940 A2 EP 0285940A2
Authority
EP
European Patent Office
Prior art keywords
sack
cover sheet
folding
bottoms
valve
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.)
Granted
Application number
EP88104908A
Other languages
German (de)
English (en)
Other versions
EP0285940A3 (en
EP0285940B1 (fr
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.)
Nordfolien GmbH
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
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
    • B65D31/142—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 an outer cover sheet.
  • the cover sheets for reinforcing the sack bottoms are preferably glued to the sack bottom or otherwise adhere to the sack bottoms.
  • this liability of the cover sheet is often weakened by the fact that 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 gussets of the sack also extend into the sack bottom region 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.
  • At least one of the cover sheets is strip-shaped and has an extension section as an additional adhesive surface at least on one of its two ends.
  • the extension sections can be provided in a manner known per se with a coating of adhesive or the like 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 designed in the manner according to the invention, but it is conceivable that the two sack bottoms of a sack are designed differently, for example because 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 essentially for Removal of the bag filling serves.
  • the extension sections can be triangular, so that the cover sheet is hexagonal in total and thus corresponds to the sack bottom shape of a sack of the type mentioned at the beginning. In this way, almost the entire bag bottom is advantageously used as a surface for the attachment of the cover sheet.
  • cover sheets are preferably manufactured continuously and are punched or cut out of material strips, for example, it is advantageous if the extension sections are tongues to which the cover sheet tapers at the end, each tongue preferably extending transversely to the longitudinal direction of the cover sheet Has end edge.
  • 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 work steps, but the cover sheet is preferably 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 is closed tapering the tongues, and thus also on the mostly acute-angled sack bottoms without the cover sheet protruding over the sack bottom in undesired areas.
  • 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 end of the sack protruding from the bottom of the bag stiffens the end of the valve hose so that the end of the valve hose remains in the insert pocket and does not slip out.
  • the cover sheet section projecting beyond the bag bottom has an extension section, which can also preferably be designed as a tongue.
  • these recesses also have the advantage that the valve hose end can be grasped and folded over directly in the region of these recesses, so that an even better seal of the valve hose end is achieved and also an insertion of the valve hose end together with the cover sheet in the insert pocket is facilitated because the insertable end of the cover sheet is tapered due to the tongue.
  • 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 hose 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.
  • a section of a sack is shown, which has a sack bottom 2, which essentially corresponds to the sack bottom shown in Fig. 2, but which also has a valve 15, which consists of a flat-folded valve hose 16, from which a valve hose end the bag bottom 2 protrudes.
  • a valve 15 Arranged below the valve 15 is 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.
  • FIG. 3 shows a further embodiment of a cover sheet 7 in plan view.
  • the cover sheet 7 has at its two ends extension sections 13 which taper at an angle and thus form almost triangular tongues.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Making Paper Articles (AREA)
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 (de) 1987-04-08 1987-04-08 Sack mit Sackböden, die durch Einwärtsfalten der Sackwände aus Faltklappen gebildet und mit Deckblättern verstärkt sind

Publications (3)

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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0976539A1 (fr) 1998-07-28 2000-02-02 Flexico-France Procédé de fabrication de sacs à fond plat et machine pour sa mise en oeuvre
DE202009007915U1 (de) 2009-06-05 2009-08-20 Worff, Herwig, Dipl.-Ing. Sack
US20190352054A1 (en) * 2016-06-23 2019-11-21 Starlinger & Co Gesellschaft M.B.H. Bag or sack-like packaging
US11524815B2 (en) * 2017-12-14 2022-12-13 Starlinger & Co Gesellschaft M.B.H. Bag for loose material

Families Citing this family (1)

* 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

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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0976539A1 (fr) 1998-07-28 2000-02-02 Flexico-France Procédé de fabrication de sacs à fond plat et machine pour sa mise en oeuvre
DE202009007915U1 (de) 2009-06-05 2009-08-20 Worff, Herwig, Dipl.-Ing. Sack
US20190352054A1 (en) * 2016-06-23 2019-11-21 Starlinger & Co Gesellschaft M.B.H. Bag or sack-like packaging
US11524815B2 (en) * 2017-12-14 2022-12-13 Starlinger & Co Gesellschaft M.B.H. Bag for loose material

Also Published As

Publication number Publication date
EP0285940A3 (en) 1989-09-20
EP0285940B1 (fr) 1993-03-10
DE3878955D1 (de) 1993-04-15
DE8705223U1 (de) 1987-09-03

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