EP0232928B1 - Method for sealing a bag and a bag produced by that method - Google Patents

Method for sealing a bag and a bag produced by that method Download PDF

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Publication number
EP0232928B1
EP0232928B1 EP87200040A EP87200040A EP0232928B1 EP 0232928 B1 EP0232928 B1 EP 0232928B1 EP 87200040 A EP87200040 A EP 87200040A EP 87200040 A EP87200040 A EP 87200040A EP 0232928 B1 EP0232928 B1 EP 0232928B1
Authority
EP
European Patent Office
Prior art keywords
bag
needle
strip
seam
filling
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 - Lifetime
Application number
EP87200040A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0232928A1 (en
Inventor
Gilles Helena Hubertus Von Berg
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.)
Bates Cepro BV
Original Assignee
Bates Cepro BV
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 Bates Cepro BV filed Critical Bates Cepro BV
Publication of EP0232928A1 publication Critical patent/EP0232928A1/en
Application granted granted Critical
Publication of EP0232928B1 publication Critical patent/EP0232928B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/04—Applying separate sealing or securing members, e.g. clips
    • B65B51/07—Sewing or stitching
    • 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
    • B65D29/00—Sacks or like containers made of fabrics; Flexible containers of open-work, e.g. net-like construction
    • B65D29/02—Sacks with laminated or multiple walls
    • 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
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/60—Uniting opposed surfaces or edges; Taping
    • B31B50/68—Uniting opposed surfaces or edges; Taping by stitching, stapling or riveting

Definitions

  • the invention is related to a method for sealing a bag of flexible material such as textile by means of a sewing needle, a strip comprising a thermoplastic material being placed on either side of the bag in the direction of the seam to be made, said strip being stitched on by making the seam with a sewing thread, which seam is sealed by means of the adhesive thermoplastic material.
  • the invention also relates to a bag obtained by said method.
  • the strip consists of a circularly woven tube having a filling of spun polymer, and that the sewing needle is round and has a conical tip so that the sewing needle and the sewing thread acquire such a temperature as a result of the frictional heat generated between the needle and the strip that the filling adheres to the needle and is drawn through the textile that is to be sealed.
  • the bag itself preferably consists of synthetic fabric.
  • Parallel strips 5 are applied on webs 1, 1 that face away from each other and a sewing thread 6 is pricked through these strips as well as through the intermediate doubled up webs 1 and 2 in the second phase of the method.
  • the sewing needle and the sewing thread 6 acquire an initial temperature that is such that the filling of the strip starts adhering.
  • the filling is then drawn through the synthetic fabric of the upper web 1, which fabric is to be sewn, and as a result the filling acquires shape 5'.
  • the lower strip 5 acquires shape 5" at that place.
  • the temperature has risen to the melting point of the filling, while, at the same time, the material of the filling acquires a solid form after pricking has taken place, on account of the fact that the needle also forms a channel.
  • the sewing needle 7 depicted in Fig. 5 consists of a cylindrical shank 8 having a thread hole 9 that debouches in a thread groove 10 in the known way.
  • An ordinary sewing needle has a tip with cutting edges as indicated by the dashed lines in Fig. 5.
  • the needle that is to be used in the invented method is, on the contrary, tapered and round, in other words it has a conical tip, so that one hole formed by the needle in webs 1 and 2 does not consist of notches but of deformations.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
  • Treatment Of Fiber Materials (AREA)
EP87200040A 1986-01-14 1987-01-14 Method for sealing a bag and a bag produced by that method Expired - Lifetime EP0232928B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8600061 1986-01-14
NL8600061A NL8600061A (nl) 1986-01-14 1986-01-14 Werkwijze voor het afdichten van een zak alsmede volgens deze werkwijze verkregen zak.

Publications (2)

Publication Number Publication Date
EP0232928A1 EP0232928A1 (en) 1987-08-19
EP0232928B1 true EP0232928B1 (en) 1990-03-14

Family

ID=19847411

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87200040A Expired - Lifetime EP0232928B1 (en) 1986-01-14 1987-01-14 Method for sealing a bag and a bag produced by that method

Country Status (3)

Country Link
EP (1) EP0232928B1 (nl)
DE (1) DE3761893D1 (nl)
NL (1) NL8600061A (nl)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3992093B1 (en) 2020-10-29 2023-06-07 Swedish Match North Europe AB Pouched product for oral use, sealing method, sealing device, method and apparatus for manufacturing a pouched product for oral use

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2142656A (en) * 1931-02-12 1939-01-03 Bemis Bro Bag Co Bag or the like of composite materials
US2403756A (en) * 1943-02-01 1946-07-09 Union Bag & Paper Corp Sewed bag closure
GB690677A (en) * 1950-11-14 1953-04-22 St Regis Paper Co Improvement in bag closures
FR2437925A3 (fr) * 1978-10-03 1980-04-30 Est Imprimerie Papeterie Procede pour reunir entre elles de facon etanche deux toiles impermeables

Also Published As

Publication number Publication date
NL8600061A (nl) 1987-08-03
DE3761893D1 (de) 1990-04-19
EP0232928A1 (en) 1987-08-19

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