EP0922638A2 - Verfahren zum Befüllen eines Ventilsacks, und Ventilsack - Google Patents

Verfahren zum Befüllen eines Ventilsacks, und Ventilsack Download PDF

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Publication number
EP0922638A2
EP0922638A2 EP99100491A EP99100491A EP0922638A2 EP 0922638 A2 EP0922638 A2 EP 0922638A2 EP 99100491 A EP99100491 A EP 99100491A EP 99100491 A EP99100491 A EP 99100491A EP 0922638 A2 EP0922638 A2 EP 0922638A2
Authority
EP
European Patent Office
Prior art keywords
bag
valve
filling
filtering
sheet
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.)
Withdrawn
Application number
EP99100491A
Other languages
English (en)
French (fr)
Other versions
EP0922638A3 (de
Inventor
Kenneth Persson
Bertil Hjelm
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.)
ASSIDOMAEN AB
Original Assignee
Assidoman Scandisack AS
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 Assidoman Scandisack AS filed Critical Assidoman Scandisack AS
Publication of EP0922638A2 publication Critical patent/EP0922638A2/de
Publication of EP0922638A3 publication Critical patent/EP0922638A3/de
Withdrawn legal-status Critical Current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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B1/00—Packaging fluent solid material, e.g. powders, granular or loose fibrous material, loose masses of small articles, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
    • B65B1/04—Methods of, or means for, filling the material into the containers or receptacles
    • B65B1/18—Methods of, or means for, filling the material into the containers or receptacles for filling valve-bags
    • 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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/01—Ventilation or drainage of bags

Definitions

  • the present invention relates to the filling of a valve bag with dust-producing and/or hazardous material, and a valve bag, preferably of the so-called canister type, which is particularly suitable for such use.
  • Valve bags are generally used for the transport of various materials. When dust-producing and/or hazardous materials are involved, it is essential that there be no leakage of material to the surroundings when filling the bag with the material and in the subsequent handling. This results in problems especially in the filling operation, when large amounts of air pass into a bag together with the material at issue. The excess pressure arising in the bag involves great risks of leakage to the surroundings and prevents the filling operation from occurring at the desired speed.
  • the object of the present invention is to provide a new filling method and a valve bag which is especially suited for this, thereby alleviating the above-mentioned problems to a considerable degree.
  • the invention is thus based on the knowledge that emission of material from the bag to the surroundings - during and after filling - can be kept under extreme control while the filling operation can be carried out in a highly efficient manner by using a tight or non-perforated bag fitted with a special filtering ventilating valve in the bag corner opposite the normal corner-mounted filling valve of the bag.
  • the filling valve is sealed immediately after the filling operation.
  • Final evacuation of air, for instance by conventional mangling of the filled bag is advantageously carried out after said sealing of the filling valve, thereby preventing emission of material through the filling valve both in connection with the ending of the filling operation and during the subsequent handling of the bag.
  • the filling valve can be sealed in various ways, for instance by means of an externally applied sealing strip or, which at present seems to be preferred, by means arranged inside the filling valve, the sealing effect of these means being achieved by applying, for instance, heat and/or pressure.
  • the ventilating valve according to the invention is a valve fitted with a filtering valve sheet which is transversely folded, its fold facing outwards from the interior of the bag.
  • a filtering valve sheet can be very easily mounted in substantially the same manner as a filling valve sheet (which is longitudinally folded) in a conventional so-called valve assembly in a bag-making machine.
  • the filtering valve sheet may advantageously be made of crepe filtering paper, although also non-woven fabric could be used.
  • Fig. 1 is a schematic view, partly in section, which illustrates an example of filling a bag according to the present invention.
  • Fig. 2 is a top plan view of the bottom part of an embodiment of a canister-type bag according to the invention, illustrating the position of the transversely folded filtering valve sheet and the filling valve sheet not yet folded, and the associated underlying glue layers.
  • Fig. 3 is a view similar to Fig. 2 and illustrates the applied bottom glue layers before the terminating bottom folding and the application and gluing of a bottom cover sheet (not shown).
  • Fig. 1 schematically illustrates the filling of a bag 1 according to the present invention.
  • a filling nozzle 3 is inserted into the filling valve 5 of the bag in one upper corner of the bag.
  • Material is injected under pressure through the filling pipe 3, also air being entrained and generating an excess pressure in the bag, which is here assumed to be completely tight, except for a ventilating valve 7 arranged in the other upper corner of the bag and consisting of a filtering sheet of paper 9 attached by gluing.
  • the ventilating valve is opened or expanded by the excess pressure so as to expose a large filtering surface, by the filtering sheet being given U-shape (in section), and air leaves through the base of the U, said base being non-glued and therefore being able to provide a large evacuation area.
  • the end of the filling pipe 3 is bent to impart to the injected material a direction obliquely downwards in the bag, i.e. away from the ventilating valve. It has surprisingly been found that a ventilating valve according to the invention does not tend to be quickly filled or clogged by injected material, but, on the contrary, yield efficient evacuation of air during the entire filling operation. No active sucking-out of air is necessary.
  • the filing pipe 3 can be pulled out of the filling valve 5 which can be immediately sealed, for instance by means of transversely applied bands of selectively activatable sealing material, advantageously of the hot-melt type. Then, a direct, active, terminating continued evacuation of air from the bag may take place through the ventilating air, preferably by mangling of the bag.
  • Figs 2 and 3 illustrate an example how to modify according to the present invention a conventional valve bag of the canister type. Since valve bags of this type are well-known, merely modifications which are important to the invention will be discussed in more detail.
  • Fig. 2 illustrates how an unfolded filling valve sheet 11 and a transversely folded filtering valve sheet 9 are glued on each side of the bag to the underlying flat-folded bag side flaps.
  • the glue layers of the filling valve sheet 11 are indicated at 13, 14, and the glue layers of the lower part of the filtering valve sheet 9 are indicated at 15.
  • the filtering valve sheet 9 has its transverse fold 17 on the outwardly facing side of the sheet.
  • the glue layer 15 begins at a considerable distance from the fold 17, such that a comparatively large non-glued area of the lower part of the sheet connects with the fold 17. This also applies to the upper part of the sheet 9, see Fig. 3.
  • the lower part of the filtering sheet 9 extends into the bag a shorter distance than does the upper part of the sheet.
  • the inner edge of the lower part is indicated at 19.
  • the innermost edge area of the lower part advantageously extends beyond the underlying side flap. Especially if this is not possible in view of the width of the bag, a corresponding recess can be formed in the side flap, thereby ensuring free exposure of the innermost edge area of the lower part of the filtering sheet 9.
  • Fig. 2 schematically shows also the arrangement of additional, transverse, selectively heat-activatable sealing agent bands 21, 22 on the underside of the filling valve sheet 11, i.e. inside the filling valve itself.
  • Fig. 3 shows how the bottom gluing can be carried out. It is apparent that the bottom glue layer 23 can basically be the same for the filling valve sheet 11 and the filtering valve sheet 9, although additional transverse glue bands 25, 26 are arranged for the inner part of the filtering sheet upper part, such that this is safely glued to the bottom of the bag and thus follows this, whereby the U-shaped opening (see Fig. 1) of the ventilating valve will be facilitated.
  • the upper part of the filtering sheet 9 has a comparatively large non-glued area connecting with the transverse fold 17.
  • the non-glued areas on both sides of the transverse fold 17 permit a large evacuation area to be formed, when the ventilating valve is opened from the inside into U-shape.
  • a bottom cover sheet (not shown) glued farthest out should either not cover the above-mentioned non-glued area or, non-glued, cover the same.
  • the bag is made of a tight or non-perforated material.
  • the invention thus makes it possible to use tight plastic bags, while maintaining the ventilating effect during filling.
  • a more efficient evacuation of air and no perforations may permit the use of thinner bag materials.
  • non-perforated bags generally leads to reduced emission while emptying the bags and handling the emptied bags.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
EP99100491A 1994-10-10 1995-10-10 Verfahren zum Befüllen eines Ventilsacks, und Ventilsack Withdrawn EP0922638A3 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9403434 1994-10-10
SE9403434A SE509957C2 (sv) 1994-10-10 1994-10-10 Förfarande för fyllning av en ventilsäck samt ventilsäck
EP95850175A EP0706940B1 (de) 1994-10-10 1995-10-10 Verfahren zum Füllen eines Ventilsacks und Ventilsack

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP95850175A Division EP0706940B1 (de) 1994-10-10 1995-10-10 Verfahren zum Füllen eines Ventilsacks und Ventilsack

Publications (2)

Publication Number Publication Date
EP0922638A2 true EP0922638A2 (de) 1999-06-16
EP0922638A3 EP0922638A3 (de) 1999-06-23

Family

ID=20395545

Family Applications (2)

Application Number Title Priority Date Filing Date
EP99100491A Withdrawn EP0922638A3 (de) 1994-10-10 1995-10-10 Verfahren zum Befüllen eines Ventilsacks, und Ventilsack
EP95850175A Expired - Lifetime EP0706940B1 (de) 1994-10-10 1995-10-10 Verfahren zum Füllen eines Ventilsacks und Ventilsack

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP95850175A Expired - Lifetime EP0706940B1 (de) 1994-10-10 1995-10-10 Verfahren zum Füllen eines Ventilsacks und Ventilsack

Country Status (4)

Country Link
EP (2) EP0922638A3 (de)
DE (1) DE69511031D1 (de)
DK (1) DK0706940T3 (de)
SE (1) SE509957C2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010116198A1 (en) * 2009-04-08 2010-10-14 Mandzsu Zoltan Valve bag and method for filling the bag

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202013102644U1 (de) * 2013-06-19 2013-07-24 Papiersackfabrik Tenax Gmbh & Co. Kg Ventilsack mit Entlüftungsvorrichtungen
CN104309829A (zh) * 2014-09-30 2015-01-28 锐派包装技术（上海）有限公司 一种喂料嘴结构
CN113306867B (zh) * 2021-06-01 2022-11-29 合肥皖燃新材料科技有限公司 沥青阻燃剂加工用物料包装袋及包装装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4140213A1 (de) * 1991-12-06 1993-06-09 Dy-Pack Verpackungen Gustav Dyckerhoff Gmbh, 5962 Drolshagen, De Ventilsack mit entlueftungsventil

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR657508A (fr) * 1928-07-13 1929-05-23 Dispositifs pour évacuer l'air des sacs à fermeture automatique dits
US2040337A (en) * 1935-04-26 1936-05-12 John A Rosmait Moisture resistant valve bag

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4140213A1 (de) * 1991-12-06 1993-06-09 Dy-Pack Verpackungen Gustav Dyckerhoff Gmbh, 5962 Drolshagen, De Ventilsack mit entlueftungsventil

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010116198A1 (en) * 2009-04-08 2010-10-14 Mandzsu Zoltan Valve bag and method for filling the bag

Also Published As

Publication number Publication date
EP0706940B1 (de) 1999-07-28
EP0922638A3 (de) 1999-06-23
EP0706940A1 (de) 1996-04-17
SE9403434D0 (sv) 1994-10-10
SE509957C2 (sv) 1999-03-29
DK0706940T3 (da) 2000-03-27
DE69511031D1 (de) 1999-09-02
SE9403434L (sv) 1996-04-11

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