GB988946A - Improvements in or relating to sacks - Google Patents

Improvements in or relating to sacks

Info

Publication number
GB988946A
GB988946A GB2963561A GB2963561A GB988946A GB 988946 A GB988946 A GB 988946A GB 2963561 A GB2963561 A GB 2963561A GB 2963561 A GB2963561 A GB 2963561A GB 988946 A GB988946 A GB 988946A
Authority
GB
United Kingdom
Prior art keywords
bag
gusset
wall
valve
walls
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
GB2963561A
Inventor
David John Waller
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.)
Bowaters Development and Research Ltd
Bowater Research and Development Co Ltd
Original Assignee
Bowaters Development and Research Ltd
Bowater Research and Development Co Ltd
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 Bowaters Development and Research Ltd, Bowater Research and Development Co Ltd filed Critical Bowaters Development and Research Ltd
Priority to GB2963561A priority Critical patent/GB988946A/en
Publication of GB988946A publication Critical patent/GB988946A/en
Expired legal-status Critical Current

Links

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

Landscapes

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

Abstract

988,946. Plastic valve bags. BOWATER RESEARCH & DEVELOPMENT CO. Ltd. Aug. 2, 1962 [Aug. 16, 1961], No. 29635/61. Heading B8K. A valve 20 (Fig. 4) is formed in a flattened gussetted bag of heat-sealable thermoplastics by an extension of the gusset 3, 4 folded in, together with parts of the side walls, about the line 21, 22, 23 to form a sleeve, and welded at 24 to the overlying walls of the bag. The bag illustrated opens to block-bottom form (Fig. 5) closed by a central weld 13. Part of the valve may be cut away at 27, and the outer wall of the sleeve may be welded to the bag bottom. The bag may be of polyvinyl chloride, or of paper coated on one or both sides with a thermoplastic material. The Provisional Specification also describes a block-bottom bag formed from a squared-off length of flattened gussetted tube, by means of an end closure weld and of corner welds at 45 degrees to the sides of the bag and joining each wall of the gusset to its overlying bag wall but not joining the walls of the gusset together.
GB2963561A 1961-08-16 1961-08-16 Improvements in or relating to sacks Expired GB988946A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2963561A GB988946A (en) 1961-08-16 1961-08-16 Improvements in or relating to sacks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2963561A GB988946A (en) 1961-08-16 1961-08-16 Improvements in or relating to sacks

Publications (1)

Publication Number Publication Date
GB988946A true GB988946A (en) 1965-04-14

Family

ID=10294671

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2963561A Expired GB988946A (en) 1961-08-16 1961-08-16 Improvements in or relating to sacks

Country Status (1)

Country Link
GB (1) GB988946A (en)

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