EP0109407B1 - Ventil aus kunststoff oder aus kunststoffbeschichtetem papier sowie dessen herstellungsverfahren - Google Patents

Ventil aus kunststoff oder aus kunststoffbeschichtetem papier sowie dessen herstellungsverfahren Download PDF

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Publication number
EP0109407B1
EP0109407B1 EP83901407A EP83901407A EP0109407B1 EP 0109407 B1 EP0109407 B1 EP 0109407B1 EP 83901407 A EP83901407 A EP 83901407A EP 83901407 A EP83901407 A EP 83901407A EP 0109407 B1 EP0109407 B1 EP 0109407B1
Authority
EP
European Patent Office
Prior art keywords
valve
plastic
slits
brim
coated paper
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
Application number
EP83901407A
Other languages
English (en)
French (fr)
Other versions
EP0109407A1 (de
Inventor
Hans Bjorke
Oddvar Bogen
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.)
Isola Emballasje AS
Original Assignee
Isola Emballasje AS
Norsk Hydro ASA
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 Isola Emballasje AS, Norsk Hydro ASA filed Critical Isola Emballasje AS
Priority to AT83901407T priority Critical patent/ATE15170T1/de
Publication of EP0109407A1 publication Critical patent/EP0109407A1/de
Application granted granted Critical
Publication of EP0109407B1 publication Critical patent/EP0109407B1/de
Expired 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 present invention concerns the actual valve of a valve bag of plastic or paper where the tube shaped valve is made from plastic coated paper and the valve according to the invention is fitted with a number of slits in the valve wall in order to make the valve spill free.
  • the invention also concerns the production of the valve and the positioning of it.
  • valve in valve bags is not tight. When the bag is put down, this will result in some of the goods in the bag being spilled through the valve. The spill can be so considerable as to cause a noticeable shortage of goods and also a mess around the bags.
  • the spill problem is particularly evident if the substance in the bag is dry and in addition is easily movable (spherical particles) or if the substance is a granulate which is particularly easily spilled.
  • fringe valves have been well known for some time, where the fringes are longitudinally located on the innermost part of the valve, i.e. that part of the valve which is the farthest inside the bag (e.g. SE-A-214 706 and US-A-2651451 ).
  • the measure has, however, the disadvantage that it is efficient for valves of paper but not for valves of plastic or plastic coated paper. This will be explained further.
  • the fringes have the disadvantage that they do not settle in the valve in the same favourable manner as for paper valves, and thereby the tightening becomes incomplete.
  • This design with lengthwise slits and where the fringes end in a small brim at the innermost edge of the valve, has proved to limit the spill of the goods effectively.
  • the design also has the advantage of being produced in a continuous process and it simplifies the production of the valve cuff and the fitting into the bag during the production process.
  • Figure 1 shows a fringe valve of a known design of the prior art in which the valve wall (1) of paper at one end is slit lengthwise in such a way as to form a fringe part with hanging loose fringes (2).
  • the fringes are divided from each other by the slitting, and the cut (3) forms the separation between the fringes.
  • the fringes (2) are fastened at their rear end to the valve (1).
  • Figure 2 shows a valve of plastic or plastic coated paper according to the invention which consists of strips (5), where the strips (5) are held together at both ends of the valve wall (1).
  • the valve wall (1) with its strips (5) constitute an entity and is here referred to as the valve.
  • the valve forms a pipe or a tube which is the result of extruding or gluing or welding of a plane foil of plastic or of plastic coated paper across the adjoining ends of the foil in the longitudinal direction of the foil.
  • the wall thickness of the foil is preferably in the range of from 80 to 120 u, but it may be thicker or thinner.
  • the width of the strips will be more or less optional, but as a rule it will depend on the width of the bottom of the bag in such a way that the narrower the bottom of the bag is, the narrower will the strips be, and vice versa. Usually, the width of the strips will be in the range of from 5 to 15 mm, but they may also be narrower or wider.
  • the strips (5) are at their rear end a continuous part of the valve wall (1), divided by slits (6). At their forward end the strips are held together by means of a brim (7) which also constitutes part of the valve wall.
  • the object of this brim (7) is to hold the strips (5) together, and thereby to prevent them from being pulled back separately into the valve when the filler spout is retracted after the filling is completed.
  • the brim (7) In order to serve its purpose, the brim (7) must have certain tensile strength so that it has a gathering effect on the strips (5). In practice it has proved that a brim width of approx. 2 mm is sufficient to achieve the desired effect. The brim width may, however, be somewhat larger for thinner foils or somewhat smaller for thicker foils.
  • FIG 3 shows the bag (8) with its folded and flattened bottom section (9). This part of the bag is known and is not part of the invention.
  • the valve (1) is shown by a dot-and-dash line glued firmly below the intersecting layers of the bag and entirely covered by an outer layer of plastic foil or foil of plastic coated paper (10).
  • the inventive conception has, moreover, not led to any changes in the existing equipment or in the work procedures, as the valve with its strips is produced continuously in the same equipment as before and is fitted into the bag in a subsequent continuous operation.

Landscapes

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

Claims (4)

1. Ein schlauchförmiges Ventil (1) für einen Beutel (8) aus Kunststoff oder Papier, wobei das Ventil aus Kunststofffolie oder kunststoffbeschichtetem Papier besteht und eine Anzahl Schlitze (6) in Längsrichtung des Ventils aufweist, dadurch gekennzeichnet, daß die Schlitze durch die beiden Seiten der Ventilwand (1) derart begrenzt sind, daß die Ventilwand (1) am vorderen Ende der Schlitze als Rand (7) endet.
2. Ventil nach Anspruch 1, dadurch gekennzeichnet, daß der Rand (7) eine Breite von 1 bis 7 mm, vorzugsweise zwischen 1,5 bis 3 mm aufweist.
3. Ventil gemäß Anspruch 1, dadurch gekennzeichnet, daß die Schlitze zwischen 20 und 100 mm, vorzugsweise von 30 bis 60 mm lang sind.
4. Verfahren zur Herstellung eines schlauchförmigen Ventils aus Kunststoff oder kunststoffbeschichtetem Papier gemäß den Ansprüchen 1, 2 und 3, dadurch gekennzeichnet, daß das Ventil in einem kontinuierlichen Verfahren in Schlitze geeigneter Länge, vorzugsweise 30 bis 60 mm, mittels Walzenmessern oder festen Messern in sich wiederholender Bewegung geteilt wird, und daß darüber hinaus die Schlitze an einem Rand (7) der Ventilwand (1) enden, wobei der Rand (7) eine Breite von etwa zwischen 1 und 7 mm, vorzugsweise zwischen 1,5 und 3 mm, aufweist, und daß das Ventil anschließend über ein Ende des Beutels gezogen und daran derart befestigt wird, daß der freie Bereich mit den Ventilstreifen (5), von dem Befestigungsmittel nicht berührt, innerhalb des Beutels verbleibt.
EP83901407A 1982-05-28 1983-04-25 Ventil aus kunststoff oder aus kunststoffbeschichtetem papier sowie dessen herstellungsverfahren Expired EP0109407B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83901407T ATE15170T1 (de) 1982-05-28 1983-04-25 Ventil aus kunststoff oder aus kunststoffbeschichtetem papier sowie dessen herstellungsverfahren.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO821811 1982-05-28
NO821811A NO150190C (no) 1982-05-28 1982-05-28 Slangeformet ventil i plast eller plastbelagt papir til sekk og fremgangsmaate for fremstilling av ventilen

Publications (2)

Publication Number Publication Date
EP0109407A1 EP0109407A1 (de) 1984-05-30
EP0109407B1 true EP0109407B1 (de) 1985-08-28

Family

ID=19886594

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83901407A Expired EP0109407B1 (de) 1982-05-28 1983-04-25 Ventil aus kunststoff oder aus kunststoffbeschichtetem papier sowie dessen herstellungsverfahren

Country Status (6)

Country Link
EP (1) EP0109407B1 (de)
DE (1) DE3360659D1 (de)
DK (1) DK151097C (de)
FI (1) FI69804C (de)
NO (1) NO150190C (de)
WO (1) WO1983004239A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8618533D0 (en) * 1986-07-30 1986-09-10 Johnsen Jorgensen Jaypak Form of mixing bag

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1918652A1 (de) * 1969-04-12 1970-12-10 Behn Verpackung Erwin Kreuzbodenventilsack mit schlauchfoermigem Fuellventil und Verfahren zur Herstellung und Anbringen des Fuellventils

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2651451A (en) * 1950-04-18 1953-09-08 Universal Paper Bag Co Valve bag

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1918652A1 (de) * 1969-04-12 1970-12-10 Behn Verpackung Erwin Kreuzbodenventilsack mit schlauchfoermigem Fuellventil und Verfahren zur Herstellung und Anbringen des Fuellventils

Also Published As

Publication number Publication date
DE3360659D1 (en) 1985-10-03
DK151097C (da) 1988-07-04
FI69804C (fi) 1986-05-26
DK151097B (da) 1987-11-02
FI69804B (fi) 1985-12-31
NO150190C (no) 1984-09-05
EP0109407A1 (de) 1984-05-30
FI840196A7 (fi) 1984-01-18
DK28884D0 (da) 1984-01-23
NO150190B (no) 1984-05-28
FI840196A0 (fi) 1984-01-18
DK28884A (da) 1984-01-23
NO821811L (no) 1983-11-29
WO1983004239A1 (en) 1983-12-08

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