EP0062326A2 - Verfahren zur Herstellung von Papiersäcken - Google Patents

Verfahren zur Herstellung von Papiersäcken Download PDF

Info

Publication number
EP0062326A2
EP0062326A2 EP82102825A EP82102825A EP0062326A2 EP 0062326 A2 EP0062326 A2 EP 0062326A2 EP 82102825 A EP82102825 A EP 82102825A EP 82102825 A EP82102825 A EP 82102825A EP 0062326 A2 EP0062326 A2 EP 0062326A2
Authority
EP
European Patent Office
Prior art keywords
collar
procedure
paper
blanks
blank
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
EP82102825A
Other languages
English (en)
French (fr)
Other versions
EP0062326B1 (de
EP0062326A3 (en
Inventor
Keijo Rantanen
Risto Lehtonen
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.)
W Rosenlew Oy AB
Original Assignee
W Rosenlew Oy AB
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 W Rosenlew Oy AB filed Critical W Rosenlew Oy AB
Priority to AT82102825T priority Critical patent/ATE23820T1/de
Publication of EP0062326A2 publication Critical patent/EP0062326A2/de
Publication of EP0062326A3 publication Critical patent/EP0062326A3/en
Application granted granted Critical
Publication of EP0062326B1 publication Critical patent/EP0062326B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/14—Cutting, e.g. perforating, punching, slitting or trimming
    • B31B70/16—Cutting webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B70/84—Forming or attaching means for filling or dispensing contents, e.g. valves or spouts
    • B31B70/85—Applying patches or flexible valve inserts, e.g. applying film-like valves

Definitions

  • Procedure for manufacturing paper bags which at both ends are provided with a sewn seam and which have on the corner of the paper bag a valve aperture provided with a collar.
  • valve aperture of the paper bag is required to be comparatively well sealing.
  • An example are toxic chemical substances to be packaged in paper bags.
  • a collar which is closed by inverting the collar after filling the paper bag. Both ends of the paper bags are provided with sewn seams.
  • the paper bag of prior art described above has to date been manufactured using the following manufacturing procedure.
  • Full width paper web is run in a hose form of desired dimensions, the paper bag now in tubular form comprising a shell part in which both ends are open.
  • one open end of the tubular paper bag is closed by sewing and the valve aperture corner is folded.
  • the tubular paper bags are taken off the production line and separate collars are manually mounted on the valve aperture.
  • the tubular paper bags are returned to the production line and the sewing of the valve aperture end is carried out in order to produce a finished paper bag.
  • the object of the invention is to achieve an improvement of the procedure of prior art.
  • a more detailed object of the invention is to provide a method in which the awkward manual step and the running of the paper bag blanks twice through the production line is avoided.
  • the objects of the invention are achieved by means of a procedure, characterized mainly on that in a full width paper web collar elements are affixed with a given spacing, that the full width paper web is run to acquire tubular shape and cut in fixed lengths, whereby the paper bag of tubular form comprises a shell with both ends open and having in one corner a collar blank, and that on the paper bags in tubular shape the corner is pleated and both open ends are sewn, whereby is produced a finished paper bag.
  • the paper bag of tubular form comprises a shell with both ends open and having in one corner a collar blank, and that on the paper bags in tubular shape the corner is pleated and both open ends are sewn, whereby is produced a finished paper bag.
  • the paper bag known in prior art, depicted in Fig. 1, has been generally indicated by the reference numeral 10.
  • the paper bag 10 comprises a shell part 11, a bottom part 12 and a top part 13. In the corner of the top part 13 a valve aperture has been provided, fitted with a collar 14 to close the valve aperture after the bag 10 has been filled. Both ends 12 and 13 of the paper bag 10 have been provided with a sewn seam 15.
  • the pleats of the paper bag 10 are indicated by the reference numeral 16.
  • the shell 11 of the paper bag 10 usually consists of several material layers, for instance of the 6-fold material thickness.
  • the full width paper web 20 is run to tubular form and cut in fixed lengths, as shown in Fig. 3.
  • the paper bag in tubular form 20a,20b, etc. comprises a shell 21, with both ends open and having on its corner a collar blank 24.
  • the paper bags in tubular form 20a,20b etc., depicted in Fig. 3, have pleats indicated with a dotted line 26.
  • Fig. 4a has been presented an advantageous embodiment of the collar blank 24a of the invention.
  • the collar blank 24a has been provided with an incision 27a, whereby folding the valve aperture by machine means is reliably managed.
  • the incision 27a is made in the first step of the procedure of the invention, at which the full width paper web 20 collar blanks 24a are glued with a given spacing.
  • the collar blank 24a has been made an oblique cut 28a, whereby the folded collar 24a can be better opened in the finished paper bag.
  • the collar blanks 24b shown in Fig. 4b is in other respects the same as the collar blank 24a of Fig. 4a, but in the collar blank 24b of Fig. 4b therefrom has been removed, instead of the incision 27a, a segmentally shaped piece 27b.
  • the collar blank 24b also has an oblique cut 28b.

Landscapes

  • Bag Frames (AREA)
  • Making Paper Articles (AREA)
EP82102825A 1981-04-06 1982-04-01 Verfahren zur Herstellung von Papiersäcken Expired EP0062326B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82102825T ATE23820T1 (de) 1981-04-06 1982-04-01 Verfahren zur herstellung von papiersaecken.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI811057 1981-04-06
FI811057A FI61832C (fi) 1981-04-06 1981-04-06 Foerfarande foer tillverkning av papperssaeckar

Publications (3)

Publication Number Publication Date
EP0062326A2 true EP0062326A2 (de) 1982-10-13
EP0062326A3 EP0062326A3 (en) 1983-07-20
EP0062326B1 EP0062326B1 (de) 1986-11-26

Family

ID=8514286

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82102825A Expired EP0062326B1 (de) 1981-04-06 1982-04-01 Verfahren zur Herstellung von Papiersäcken

Country Status (4)

Country Link
EP (1) EP0062326B1 (de)
AT (1) ATE23820T1 (de)
DE (1) DE3274436D1 (de)
FI (1) FI61832C (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI80427C (fi) * 1987-05-26 1990-06-11 Rosenlew Ab Oy W Foer hand baerbar saeck.

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2559873A (en) * 1944-10-19 1951-07-10 Arkell & Smiths Machine for and method of manufacturing valve bags
DE1119644B (de) * 1953-05-12 1961-12-14 St Regis Paper Co Verfahren und Vorrichtung zum Herstellen von flachen Ventilsack- oder Ventilbeutel-Schlauchstuecken
US3002747A (en) * 1955-07-05 1961-10-03 Int Paper Co Bag feeding, valving and sewing machine
DE1274432B (de) * 1960-01-19 1968-08-01 Int Paper Co Maschine zum Herstellen von gezwickelten Schlauchstuecken mit einer Klappe und Manschette
BE623563A (de) * 1961-10-13

Also Published As

Publication number Publication date
DE3274436D1 (en) 1987-01-15
EP0062326B1 (de) 1986-11-26
FI61832B (fi) 1982-06-30
ATE23820T1 (de) 1986-12-15
EP0062326A3 (en) 1983-07-20
FI61832C (fi) 1982-10-11

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