EP0135605A1 - Valve de remplissage pour sac à valve - Google Patents

Valve de remplissage pour sac à valve Download PDF

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Publication number
EP0135605A1
EP0135605A1 EP83109649A EP83109649A EP0135605A1 EP 0135605 A1 EP0135605 A1 EP 0135605A1 EP 83109649 A EP83109649 A EP 83109649A EP 83109649 A EP83109649 A EP 83109649A EP 0135605 A1 EP0135605 A1 EP 0135605A1
Authority
EP
European Patent Office
Prior art keywords
valve
bag
filling
sheet
rear section
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Withdrawn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
EP83109649A
Other languages
German (de)
English (en)
Inventor
Heinz Schwerdfeger
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.)
Fischer and Krecke GmbH and Co KG
Original Assignee
Fischer and Krecke GmbH and Co KG
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 Fischer and Krecke GmbH and Co KG filed Critical Fischer and Krecke GmbH and Co KG
Priority to EP83109649A priority Critical patent/EP0135605A1/fr
Publication of EP0135605A1 publication Critical patent/EP0135605A1/fr
Withdrawn legal-status Critical Current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

Definitions

  • the invention relates to a filling valve for a single-layer or multi-layer paper bag or a valve bag made of plastic film, through which the sack filled with powdery or granular material is filled and which closes the filling opening after the filling process, so that the filling material on free exit is prevented.
  • Valve sacks are known in numerous embodiments: There are paper valve sacks with and without side gussets, for the manufacture of which a tube is first formed from a single or multi-ply open paper web and glued lengthwise and then divided into individual sections with a smooth or staggered dividing line, the ends of which are open on both sides are then closed in a suitable manner, a valve being inserted through which the otherwise closed sack can be filled either when the hose is formed in the open longitudinal seam or when the base is formed in one of the two floors.
  • valve bags are also produced from an open plastic web or one that has already been preformed into a tube.
  • the filling valve has a multiple function. On the one hand, it must enable a quick and safe filling and, on the other hand, after the filling process has ended, the sack must be hermetically sealed so that the filling does not come out, or only in an accepted small amount.
  • valve sack when manufacturing a valve sack, one is usually pre-either in the still open longitudinal seam of the flat web to be folded and glued into a tube, or in one of the two specially shaped bases Folded and / or pre-glued or pre-welded valve inserted and glued or welded, the valve consisting essentially of an expandable valve tube that is longer than the track width with which this valve is glued or welded to the bag, so that the expandable valve tube a certain length is freely movable.
  • valve bag with the valve trunk is pulled onto a filler neck.
  • the filling material is blown into the valve bag through the filler neck, excess air being able to escape without parts of the filling material also escaping at the same time.
  • valves are formed of simply folded valve leaves in part, have partly due to complicated folds, which tubular means are formed with reinforcing cloth and / or are made unststoffbogen in part of more than one paper or K.
  • the valves all have at least one valve tube which can be expanded to form a filling hose and separate air outlet channels from which the excess air blown in during the filling process can escape again. Difficulties with these valves result from the fact that the re-escaping air tears back even if only a very small part of the filling material, so that dusting can hardly be avoided, particularly in the case of powdery filling material.
  • the invention has for its object to provide a valve for valve bags with which an exceptional dust tightness is achieved.
  • the invention is based on the knowledge that a valve can be obtained dust-tight if it can easily nestle against the filler neck in the area of its freely movable valve trunk and is porous so that the return air can pass, but the filling material either due to its granularity or due to a tendency to block does not flow back.
  • a filling valve designed according to the invention is produced from a paper or plastic section forming the main valve trunk, to which a highly supple, porous web material is glued to the area which later faces the inside of the bag. From the sheet glued together in this way and consisting of two different flat web materials, the valve is then formed in a manner known per se by single or multiple folding, gluing and / or welding.
  • the prefabricated valve sheet for the later valve inlet side can be made of a normal sheet of paper, on the side that later faces the inside of the sack, for example, of tissue paper.
  • the side facing the later filler opening is to be made from a normal plastic film, while the part facing the inside of the sack either also from one glued tissue paper, or can consist of a plastic fabric.
  • valve sheet to be formed into the valve hose is expediently cut in steps, so that the valve inlet has a projecting tab from which the rear inlet edge is easier to grasp and the valve is thus easier to open.
  • This opening tab facilitating the opening can also be folded and glued after the end of the filling process via the valve fill opening, so that the valve bag is hermetically closed.
  • valve trunk formed from the porous material strip is advantageously cut open at its lower edge.
  • FIG. 1 shows an initially open two-part valve sheet, a main valve sheet 1 consisting of a closed paper or plastic later being the Input opening of the valve is turned, while an auxiliary valve sheet 2 connected in the glue or adhesive track 6 to the main valve sheet consists of very flexible and movable, porous material. 3 with a fold line is designated, in which, for example, the valve shaped according to FIG. 2 is simply folded. 4 identifies the later filling opening and 5 shows an incision to be advantageously made in the auxiliary valve sheet.
  • FIG. 3 shows a section of a valve bag 10 with a valve according to the invention according to FIGS. 1 and 2 embedded in the longitudinal seam of the bag.
  • FIG. 4 shows a 9-shaped valve, as is used, for example, in European patent application no. 82 108 232.8 is described, which, analogously to the cutout according to FIG. 3, is let into the longitudinal seam of a paper or plastic film valve sack, the projecting tab 7 serving to stabilize the longitudinal seam and thus to increase the strength of the sack.
  • FIG. 5 shows in view a Q-shaped valve, as is also disclosed in European patent application no. 82 108 232.8 is shown, and which here according to the invention is divided into two sections 1 and 2, that is to say divided into double strips, analogously to FIG. 1.
EP83109649A 1983-09-27 1983-09-27 Valve de remplissage pour sac à valve Withdrawn EP0135605A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP83109649A EP0135605A1 (fr) 1983-09-27 1983-09-27 Valve de remplissage pour sac à valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP83109649A EP0135605A1 (fr) 1983-09-27 1983-09-27 Valve de remplissage pour sac à valve

Publications (1)

Publication Number Publication Date
EP0135605A1 true EP0135605A1 (fr) 1985-04-03

Family

ID=8190706

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83109649A Withdrawn EP0135605A1 (fr) 1983-09-27 1983-09-27 Valve de remplissage pour sac à valve

Country Status (1)

Country Link
EP (1) EP0135605A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3065899A (en) * 1961-01-16 1962-11-27 Chase Bag Company Self-sealing valves for multiwall bags
GB2018721A (en) * 1978-04-14 1979-10-24 Wavin Bv A plastics bag with a filling valve
DE3145259A1 (de) * 1981-11-14 1983-05-26 Nordenia-Kunststoffe Peter Mager Kg, 2841 Steinfeld Als verpackungsmittel fuer schuettgueter verwendbarer sack aus vorzugsweise kunststoffolie

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3065899A (en) * 1961-01-16 1962-11-27 Chase Bag Company Self-sealing valves for multiwall bags
GB2018721A (en) * 1978-04-14 1979-10-24 Wavin Bv A plastics bag with a filling valve
DE3145259A1 (de) * 1981-11-14 1983-05-26 Nordenia-Kunststoffe Peter Mager Kg, 2841 Steinfeld Als verpackungsmittel fuer schuettgueter verwendbarer sack aus vorzugsweise kunststoffolie

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB LI LU NL SE

17P Request for examination filed

Effective date: 19851002

17Q First examination report despatched

Effective date: 19860416

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19870425

RIN1 Information on inventor provided before grant (corrected)

Inventor name: SCHWERDFEGER, HEINZ