EP0062326B1 - Verfahren zur Herstellung von Papiersäcken - Google Patents

Verfahren zur Herstellung von Papiersäcken Download PDF

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Publication number
EP0062326B1
EP0062326B1 EP82102825A EP82102825A EP0062326B1 EP 0062326 B1 EP0062326 B1 EP 0062326B1 EP 82102825 A EP82102825 A EP 82102825A EP 82102825 A EP82102825 A EP 82102825A EP 0062326 B1 EP0062326 B1 EP 0062326B1
Authority
EP
European Patent Office
Prior art keywords
sheet
paper
blanks
collar
full width
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
EP82102825A
Other languages
English (en)
French (fr)
Other versions
EP0062326A3 (en
EP0062326A2 (de
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

  • the invention relates to a method of manufacturing paper bags according to the pre-characterizing portion of claim 1.
  • 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 sheet which is closed by inverting it after filling the paper bag has been fitted a sheet which is closed by inverting it 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 up to date been manufactured using the following manufacturing procedure.
  • Full width paper web is run in a tubular form of desired dimensions, the paper bag now in tubular form comprising a sleeve 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 sheets 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.
  • This method is encumbered by several drawbacks.
  • the method requires the cutting of separate sheet blanks and the manual placing of them into the valve aperture which is a cumbersome step and in which costs are incurred.
  • the paper bag blanks have to be run twice through the production line with the result that efficient enough production cannot be achieved.
  • the DE-B-1 119 644 discloses a method of manufacturing paper bags of the type indicated in the precharacterizing portion of claim 1.
  • sheet blanks are automatically affixed on a paper web, or in the case of utilizing a paper web being composed of several paper layers, are automatically inserted between two of those layers.
  • the sheet blanks are situated on the paper web in such a manner that they are positioned in a corner portion after the paper web has been brought into a tubular form and separated in desired dimensions. Afterwards valve means are inserted into those sheets. Then the tubular paper bags are sewn together at this end portions.
  • the production of the paper bag is interrupted when the valve means is inserted into the sheet before sewing together the top end and the bottom end of the 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 sleeve 11, a bottom part 12 and a top part 13.
  • a valve aperture has been provided, fitted with a patch or sheet 14 to close the valve aperture after the bag 10 has been filled.
  • Both ends, respectively the bottom and the top part 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 sleeve 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 20a, 20b intubularform, etc. comprises a sleeve 21, with both ends open and having on its corner a sheet blank 24.
  • the paper bags 20a, 20b in tubular form etc., depicted in Fig. 3, have pleats 26 indicated with a dotted line.
  • Fig. 4a has been presented an advantageous embodiment of the sheet blank 24a of the invention.
  • the sheet 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 to the full width paper web 20 sheet blanks 24a are glued with a given spacing.
  • the sheet blank 24a has been made an oblique cut 28a, whereby the folded sheet blank 24a can be better opened in the finished paper bag 10.
  • the sheet blank 24b shown in Fig. 4b is in some respects the same as the sheet blank 24a of Fig. 4a, but in the sheet blank 24b of Fig. 4b has been removed, instead of the incision 27a, a segmentally shaped piece 27b.
  • the sheet blank 24b also has an oblique cut 28b.

Landscapes

  • Making Paper Articles (AREA)
  • Bag Frames (AREA)

Claims (5)

1. Verfahren zur Herstellung von Papiersäcken (10), die an beiden Enden mit einer Naht (15) versehen sind und an einer Ecke des Papiersacks (10) eine Füllöffnung haben, die mit einem Blatt (14) versehen ist, wobei Blattrohlinge (24) in einem vorgegebenen Abstand aud eine Papierbahn (20) voller Breite befestigt werden, die derart geführt wird, daß sie Rohrform annimmt und die in schlauchartige Teillängenabschnitte mit zwei offenen Enden geschnitten wird, wobei die offenen Enden vernäht werden, dadurch gekennzeichnet, daß die Blattrohlinge (24, 24a, 24b, 24c, etc.) auf der Außenfläche der Schicht der Papierbahn (20) voller Breite befestigt werden, die in Rohrform (20a, 20b, etc.) zur Außenfläche wird, une daß auf den Papiersäcken in Rohrform (20a, 20b, etc.) die die Blattrohlinge tragenden Ecken gefaltet werden, bevor die offenen Enden vernäht werden.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß als Blattrohling (24, 24a) ein mit einem Einschnitt (27, 27a) versehener Blattrohling (24, 24a) verwendet wird und daß der Einschnitt (27, 27a) bei dem Verfahrensschritt hergestellt wird, bei dem Blattrohlinge (24) in einem vorgegebenen Abstand auf die Papierbahn (20) voller Breite aufgeklebt werden.
3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß als Blattrohling (24) ein Blattrohling (24b) angewendet wird, von dem ein etwa segmentförmiges Stück (27b) entfernt ist, und daß die Entfernung des segmentförmigen Stükkes (27b) bei dem Verfahrensschritt ausgeführt wird, bei dem Blattrohlinge (24) mit einem vorgegebenen Abstand auf der Papierbahn (20) voller Breite befestigt werden.
4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß als Blattrohling (24) ein Blattrohling (24c) benutzt wird, von dem ein etwa dreieckiges Stück (27c) entfernt ist, und daß die Entfernung des etwa dreieckigen Stückes (27c) bei dem Verfahrensschritt durchgeführt wird, bei dem Blattrohlinge (24) mit einem vorgegebenen Abstand auf die Papierbahn (20) voller Breite befestigt werden.
5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß als Blattrohlinge (24a, 24b, 24c) Blattrohlinge verwendet werden, an deren Rand ein Schrägschnitt (28a, 28b, 28c) gemacht wurde.
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
FI811057A FI61832C (fi) 1981-04-06 1981-04-06 Foerfarande foer tillverkning av papperssaeckar
FI811057 1981-04-06

Publications (3)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4971453A (en) * 1987-05-26 1990-11-20 Oy W. Rosenlew Ab Portable bag and method for making the same

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4971453A (en) * 1987-05-26 1990-11-20 Oy W. Rosenlew Ab Portable bag and method for making the same

Also Published As

Publication number Publication date
FI61832B (fi) 1982-06-30
ATE23820T1 (de) 1986-12-15
EP0062326A3 (en) 1983-07-20
EP0062326A2 (de) 1982-10-13
FI61832C (fi) 1982-10-11
DE3274436D1 (en) 1987-01-15

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