WO1996030271A1 - Sac a valve a fond croise ou a fond forme - Google Patents

Sac a valve a fond croise ou a fond forme Download PDF

Info

Publication number
WO1996030271A1
WO1996030271A1 PCT/EP1996/001217 EP9601217W WO9630271A1 WO 1996030271 A1 WO1996030271 A1 WO 1996030271A1 EP 9601217 W EP9601217 W EP 9601217W WO 9630271 A1 WO9630271 A1 WO 9630271A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
sack
slots
lines
valve tube
Prior art date
Application number
PCT/EP1996/001217
Other languages
German (de)
English (en)
Inventor
Volker Runge
Rüdiger Rischke
Original Assignee
Henkel Kommanditgesellschaft Auf Aktien
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 Henkel Kommanditgesellschaft Auf Aktien filed Critical Henkel Kommanditgesellschaft Auf Aktien
Priority to EP96909104A priority Critical patent/EP0815024B1/fr
Priority to DK96909104T priority patent/DK0815024T3/da
Priority to DE59601262T priority patent/DE59601262D1/de
Publication of WO1996030271A1 publication Critical patent/WO1996030271A1/fr

Links

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 cross or block bottom valve sack.
  • Difficulties arise when filling a cross or block bottom valve sack with, in particular, dusty or powdery filling materials using pneumatic filling devices, in that the filling nozzle of a filling device which extends through the valve is not enclosed by the valve in such a way that no dusty or powdery material can leak.
  • the filling nozzle of a filling device which extends through the valve is not enclosed by the valve in such a way that no dusty or powdery material can leak.
  • larger quantities of the filling material can escape to the outside under certain circumstances, which is particularly associated with a strong development of dust clouds.
  • EP 0 357 835 B1 discloses a cross or block bottom valve sack made of paper, plastic film or the like, foldable material for in particular dusty or powdery filling material with a filling valve.
  • the filling valve is formed in one of its two sack bottoms laterally delimited by bottom side fold lines in the region of a corner fold forming a valve.
  • the filling valve has a valve tube projecting into the interior of the sack with one end beyond the corner wedge forming the valve.
  • the valve hose In its end region projecting into the sack interior, the valve hose is provided with a cross-sectional constriction which starts from the longitudinal hose edges lying opposite one another in the flat state of the valve hose and ends at the inner end edge of the valve hose.
  • the cross-sectional constriction is formed by adhesive connections on the edge between the two material layers of the valve tube lying flat.
  • the adhesive connection is in the form of a triangle, the hypotenuses of Triangles in the valve hose face each other and converge towards the inner end edge of the valve hose.
  • DE-AS 1 115 118 describes a comparable cross or block bottom valve sack, the adhesive connection between the two material layers of the flat-lying valve hose being designed to form the cross-sectional constriction in the form of elongated rectangular strips.
  • valve sack made of paper or similar material with valve hoses protruding into the sack interior is known.
  • the valve hoses have slots to form fringes or tongues.
  • This publication proposes at least three valve hoses, each consisting of single or double layers, which have rows of slots projecting into the interior of the sack at different distances from the sack valve inlet, the various valve hoses being attached in part to the valve outlet and in part to the inside end of the corner insert.
  • the formation of the strips or tongues serve to improve the independent closing action of the valve.
  • the present invention is based on the object of developing the known cross or block bottom valve sack in such a way that part of the filling material is prevented from escaping while avoiding adhesive bonds during a filling process. According to the invention this object is achieved by a cross or block bottom valve sack with the features of claim 1. Advantageous further developments are the subject of the subclaims.
  • valve hose forms its end area according to the cross section of the filler neck.
  • the section can be physically divided by target dividing lines.
  • the target dividing lines can be a material weakening of the valve hose.
  • the material weakening should be so large that when a filler neck is inserted into the valve hose, the valve hose tears along the material weakening through the filler neck.
  • a plurality of material weakenings can be formed next to one another, so that the cross or block bottom valve sack according to the invention can also be filled by filling nozzles of different external contours, each of which creates openings of a suitable size.
  • the end section is preferably physically divided by slots.
  • the formation of slots has the advantage that, by inserting a filler neck into the valve hose, the filler neck only has to unfold a part of the end section.
  • the nominal separating lines or slots are expediently of the same length. This facilitates the manufacture of a valve hose.
  • An embodiment is preferred in which the end section is folded over a fold line which runs essentially perpendicular to the desired separating lines or slits.
  • the predetermined dividing lines or slots preferably end at this fold line.
  • the predetermined separating lines or slots are preferably formed only in one surface of the valve tube lying flat.
  • the end section of the valve hose is folded over in such a way that the surface of the valve hose that has no predetermined separation lines or no slots is folded over onto itself.
  • valve hose with two predetermined separation lines or slots running at a distance from one another.
  • the distance between the two nominal dividing lines or slots should be dimensioned such that the section lying between the nominal dividing lines or slots unfolds when a filler neck is inserted into the valve hose and surrounds the filler neck in a sealing manner.
  • valve hose from a gas-permeable material.
  • the overpressure in the sack which arises during the filling process can escape through the surface of the valve hose without the contents being able to emerge from the inside of the sack.
  • valve hose or the valve hose and the closure sleeve are designed such that this or this, when a filler neck is inserted into the valve hose, runs or runs conically towards the inside of the bag.
  • FIG. 4 shows the valve hose according to FIG. 3 with a partially unfolded section
  • Fig. 5 shows the valve tube of Fig. 3 with the section fully unfolded
  • Fig. 6 shows a valve hose with an end sleeve.
  • valve bag which can consist of paper. Instead of paper, other materials or paper coated with a plastic can also be used.
  • the bottom middle breaking line is shown in FIGS. 1 and 2 with the reference number 1.
  • the two bottom fold lines are illustrated by dashed lines 2 and 3, respectively.
  • the two side covers have the reference numerals 4, 5.
  • the reference numerals 7 and 8 denote the corner inserts located opposite each other.
  • a blank 9 is glued to the corner wrap 7.
  • the blank 9 is essentially rectangular. This material blank 9 is almost arranged symmetrically with respect to the bottom middle break line 1. It ends in front of the edge of the bottom envelope 4 or 5.
  • the material blank 9 forms a closure sleeve 11 in the folded state of the bottom, as will be described in more detail later.
  • a filling valve 10 in the form of a hose is arranged on the material blank 9.
  • the valve hose 10 protrudes into the bag interior 12.
  • the valve hose 10 has an end section 13 which projects into the bag interior 12.
  • the end section 13 is provided with slots and folded over on itself along the fold line 15.
  • FIG. 2 shows a valve sack in which the position of the section 16 formed between the slots 14 assumes after the introduction of a filler neck, which is not shown.
  • FIGS. 3 to 5 a valve hose 10 is shown.
  • the valve hose 10 has a lower surface 17 and an upper surface 18, which are connected to one another via the edge surfaces 19, 20.
  • the upper surface 18 is formed by two overlapping strips 21, 22.
  • the valve tube 10 has an end section 13 folded over the fold line 15. 3, the end section 13 is shown in dashed lines if it has not yet been folded over onto the fold line 15 on itself.
  • the end section 13 has two slots 14a, 14b.
  • the slots 14a, 14b are of equal length and extend from the end face 23 of the end section 13 to the fold line 15.
  • the slots 14a, 14b are shown in dash-dot lines and are spaced apart from one another.
  • the slits 14a, 14b are formed in the lower surface 17. No slots are provided in the upper surface 18 of the end portion 13.
  • FIG. 4 shows a position of section 16 during the folding process. 5, section 16 is completely opened. The remaining part of the end section 13 maintains its position, but bends around the filler neck.
  • the distance between the slots 14a and 14b is dimensioned such that the opening which results when the filler neck is carried out tightly surrounds the filler neck, in particular supported by an overpressure which may arise during filling in the bag.
  • a valve hose 10 as described in FIGS. 3 to 5, is provided with a closure sleeve 11.
  • the valve hose 11 projects into the closure sleeve 11.
  • the surface of the closure sleeve 11 is coated with a thermoplastic. The thermoplastic coating leads to a tight seal of the filling valve when the coating is heated and then cooled.
  • the end section can have perforations or material weaknesses.
  • a plurality of predetermined dividing lines in the form of perforation or the like can also be formed in the end section.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Basic Packing Technique (AREA)
  • Revetment (AREA)
  • Pens And Brushes (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Abstract

L'invention concerne un sac à valve à fond croisé ou à fond formé destiné notamment à contenir un produit pulvérulent, et muni d'une valve de remplissage (10). Cette dernière (10) est incorporée dans un des deux fonds du sac d'un pli d'angle (7, 8), délimités latéralement par les lignes de pliage des côtés du fond. La valve de remplissage (10) comporte un flexible (10) qui fait saillie à une extrémité à l'intérieur du sac. La section terminale (13) du flexible de valve (10) qui fait saillie à l'intérieur du sac est subdivisée sur le plan dimensionnel sensiblement dans le sens longitudinal dudit flexible (10). Lorsque le flexible de valve (10) est posé à plat, la section terminale (13) subdivisée sur le plan dimensionnel est enroulée sur elle-même le long d'une ligne de pliage (15). Lorsqu'une tubulure de remplissage est introduite, le flexible de valve (10) ne s'ouvre le long des subdivisions que dans la mesure requise et entoure étroitement la tubulure de remplissage, de manière à ce que le produit pulvérulent ne puisse sortir du sac par les côtés.
PCT/EP1996/001217 1995-03-30 1996-03-21 Sac a valve a fond croise ou a fond forme WO1996030271A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP96909104A EP0815024B1 (fr) 1995-03-30 1996-03-21 Sac a valve a fond croise ou a fond forme
DK96909104T DK0815024T3 (da) 1995-03-30 1996-03-21 Kryds- eller klodsbundventilsæk
DE59601262T DE59601262D1 (de) 1995-03-30 1996-03-21 Kreuz- oder klotzbodenventilsack

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19511814.6 1995-03-30
DE19511814A DE19511814A1 (de) 1995-03-30 1995-03-30 Kreuz- oder Klotzbodenventilsack

Publications (1)

Publication Number Publication Date
WO1996030271A1 true WO1996030271A1 (fr) 1996-10-03

Family

ID=7758242

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1996/001217 WO1996030271A1 (fr) 1995-03-30 1996-03-21 Sac a valve a fond croise ou a fond forme

Country Status (6)

Country Link
EP (1) EP0815024B1 (fr)
AT (1) ATE176435T1 (fr)
DE (2) DE19511814A1 (fr)
DK (1) DK0815024T3 (fr)
ES (1) ES2128166T3 (fr)
WO (1) WO1996030271A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8142077B2 (en) 2008-04-16 2012-03-27 Graphic Packaging International, Inc. Bag structures and methods of assembling the same
DE202015004837U1 (de) * 2015-07-07 2016-10-13 Dy-Pack Verpackungen Gustav Dyckerhoff Gmbh Ventilsack

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE818327C (de) * 1950-03-26 1951-10-25 Verpackungsbedarf G M B H Anwendung des Stoepsels zum Versperren des Ventils von Ventilsaecken
DE842586C (de) * 1950-09-17 1952-06-30 Verpackungsbedarf G M B H Ventilsack aus Papier od. dgl.
DE2006146A1 (de) * 1970-02-11 1971-08-19 Wilhelmstal Ernst & Sohn, 5608 Krebsoge Mehrlagiger Ventilsack
FR2228004A1 (en) * 1973-05-02 1974-11-29 Gartemann & Hollmann Gmbh Filling device for double layer sacks - consists of plastic tube whose inner end is folded to form seal
US4387749A (en) * 1981-09-08 1983-06-14 Champion International Corporation Filler sleeve for use in conjunction with a bag adapted to contain a granular product
US4391404A (en) * 1981-08-13 1983-07-05 Champion International Corporation Sleeve valve for flexible bags
EP0332549A1 (fr) * 1988-03-10 1989-09-13 LEMBACEL Société Anonyme Sac d'emballage souple équipé d'une valve de remplissage

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE818327C (de) * 1950-03-26 1951-10-25 Verpackungsbedarf G M B H Anwendung des Stoepsels zum Versperren des Ventils von Ventilsaecken
DE842586C (de) * 1950-09-17 1952-06-30 Verpackungsbedarf G M B H Ventilsack aus Papier od. dgl.
DE2006146A1 (de) * 1970-02-11 1971-08-19 Wilhelmstal Ernst & Sohn, 5608 Krebsoge Mehrlagiger Ventilsack
FR2228004A1 (en) * 1973-05-02 1974-11-29 Gartemann & Hollmann Gmbh Filling device for double layer sacks - consists of plastic tube whose inner end is folded to form seal
US4391404A (en) * 1981-08-13 1983-07-05 Champion International Corporation Sleeve valve for flexible bags
US4387749A (en) * 1981-09-08 1983-06-14 Champion International Corporation Filler sleeve for use in conjunction with a bag adapted to contain a granular product
EP0332549A1 (fr) * 1988-03-10 1989-09-13 LEMBACEL Société Anonyme Sac d'emballage souple équipé d'une valve de remplissage

Also Published As

Publication number Publication date
DE59601262D1 (de) 1999-03-18
EP0815024B1 (fr) 1999-02-03
ATE176435T1 (de) 1999-02-15
ES2128166T3 (es) 1999-05-01
DK0815024T3 (da) 1999-09-20
EP0815024A1 (fr) 1998-01-07
DE19511814A1 (de) 1996-10-02

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