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US 4,207,937 AGranted
Flexible bulk container
AssigneeTay Textiles Limited
InventorsAllan M. Sandeman, James D. Bell
Life of this patent
Estimating the term…
Abstract
A flexible bulk container for carrying up to one ton of material in e.g. granular form. The container includes a bag of woven fabric such as polypropylene. Where necessary for reasons of reinforcement, i.e. where lifting loops are attached, or adjacent seams, the warp of the fabric is of increased strength per unit width. This is achieved by the use of higher tenacity warp threads, and/or a higher density of warp threads.
Claims21
A flexible bulk container comprising:
- (a) a bag portion of woven fabric having side walls and a closed bottom,
- (b) flanges of at least double thickness formed from the side walls and extending downwardly from the upper end of the side walls,
- (c) lifting means being attached to the flanges at the upper end of the side walls,
- (d) the warp threads of the fabric constituting the side walls extending in the vertical direction, and
- (e) the strength of the warp per unit width in the region of attachment of the lifting means along each said flange being greater than that over at least the major part of the remainder of the side walls.
2 more elements
A flexible bulk container of woven fabric, said container comprising:
- (a) side walls and a closed bottom,
- (b) the warp threads of the fabric constituting the side walls extending up the bag,
- (c) a joint formed along two fabric portions constituting the side walls and adjacent the selvedges thereof, said joint extending downwardly from the upper end of the side walls,
- (d) the strength of the warp per unit width in regions adjacent to and terminating at the respective selvedges being greater than that over at least the major part of the remainder of the portions, and
- (e) lifting means being attached to the side walls in said regions of said joint at the upper ends of said side walls.
2 more elements
A flexible bulk container comprising:
- (a) a bag of woven fabric having side walls and a closed bottom,
- (b) the warp threads of the fabric constituting the side walls extending up the bag and including regions in which the strength of the warp per unit width is greater than that over at least the major part of the remainder of the side walls,
- (c) flanges of at least double thickness material being formed in said regions and extending from the side walls, and
- (d) lifting means are attached to said flanges adjacent the upper ends thereof, the width of said greater warp regions and said flanges being sufficient to accommodate said lifting means,
- (e) each lifting means comprises a loop having two legs,
- (f) the legs straddling a respective flange and being connected thereto by stitching passing through both said legs and the flange.
3 more elements
A flexible bulk container comprising:
- (a) a bag consisting of three woven fabric portions including a substantially U-shaped portion defining first and second side walls and the base of the bag, and two remaining portions connected across the ends of the U-shaped portion and defining third and fourth side walls,
- (b) warp threads of the substantially U-shaped portion extending up the first and second side walls and across the base,
- (c) warp threads of the two remaining portions extending up the third and fourth side walls,
- (d) each of said portions including regions extending the length thereof in which the strength of the warp per unit width is greater than that over at least the major part of the remainder of the respective portion, and
- (e) lifting means attached to said regions adjacent the upper end of the bag.
2 more elements
Dependencies are inferred from the claim text.