Patent US4010784A successfully refreshed from Google Patents.
US4010784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bulk containers
Assignee: LOLIFT B-G Ltd HALFPENNY LANE KNARESBOROUGH NORTH YORKSHIRE HG5 OPS ENGLAND A Co OF ENGLAND
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Filing: 1975-10-15
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Granted: 1977-03-08
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Expires: 1995-10-15
Abstract
Abstract A bag for transporting bulk quantities of powdered or granular material, the bag having a top and four separate lifting loops disposed around the top, each loop having a bight and two spaced legs. Each leg is secured to the fabric of the bag by folding a section of the fabric to a substantially S-shaped configuration along fold lines extending from the top towards the bottom of the bag to form three overlying thicknesses of fabric and stitching through the three thicknesses of fabric and the leg. The resulting characteristic shape of the bag provides inherent stability to the bag and the stitching technique allows high factors of safety to be obtained. In a presently preferred embodiment, the filled bag has a shape resembling that of a wide-necked bottle, with a broader base and a tapered top.
Inventors
- 👤 Frank Nattrass
- 👤 Peter Johnson Nattrass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:21
CPC Classifications
B; B65; B65D; B65D88/00; B65D88/16; B65D88/1612; B65D88/1668; B65D88/1675; B65D88/1681
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
87 words
A bag for transporting bulk material, the bag having a top and having four separate lifting loops disposed around the top, each loop having a bight and two spaced legs, and each leg being secured to the fabric of the bag by being disposed along a section of the fabric folded to a substantially S-shaped configuration along fold lines extending from the top towards the bottom of the bag to form three overlying thicknesses of fabric and stitching through the three thicknesses of fabric and the leg.
Claim 2
Dependent Claim
87 words
A bag for transporting bulk material, the bag having a top and having four separate lifting loops disposed around the top, each loop having a bight and two spaced legs, and each leg being secured to the fabric of the bag by being disposed along a section of the fabric folded to a substantially S-shaped configuration along fold lines extending from the top towards the bottom of the bag to form three overlying thicknesses of fabric and stitching through the three thicknesses of fabric and the leg.
Claim 3
Dependent Claim
37 words
A bag according to claim 1 in which the material of each loop is at least 2 inches wide and the material of the bag has a tensile strength of at least 50 kg. per linear inch.
Claim 4
Dependent Claim
25 words
A bag according to claim 2 in which the material of the bag has a tensile strength of at least 83.3 kg. per linear inch.
Claim 5
Dependent Claim
24 words
A bag according to claim 2 in which the material of the bag has a tensile strength of about 150 kg. per linear inch.
Claim 6
Dependent Claim
21 words
A bag according to claim 1 in which the material of the bag is woven from a high tenacity synthetic fibre.
Claim 7
Dependent Claim
25 words
A bag according to claim 5 in which the material of the bag is 15 × 15 per sq. inch woven polypropylene of 2000 denier.
Claim 8
Dependent Claim
22 words
A bag according to claim 1 in which the material of each loop has a breaking load of at least 600 kg..
Claim 9
Dependent Claim
22 words
A bag according to claim 7 in which the material of each loop has a breaking load of at least 1000 kg..
Claim 10
Dependent Claim
21 words
A bag according to claim 7 in which the material of each loop has a breaking load of about 1810 kg..
Claim 11
Dependent Claim
17 words
A bag according to claim 1 in which the material of each loop is woven polyethylene terephthalate.
Claim 12
Dependent Claim
38 words
A bag according to claim 1 in which the top of the bag is provided with a cover stitched to the fabric of the bag, the cover having a central opening which may be closed by a drawstring.
Claim 13
Dependent Claim
28 words
A bag according to claim 1 in which the filled bag has a shape resembling that of a wide-necked bottle, with a broader base and a tapered top.
Claim 14
Dependent Claim
79 words
A bag for transporting bulk material, the bag having an open top and having four separate lifting loops disposed around the open top, each loop having a bight and two spaced legs, and each leg being secured to the fabric of the bag by folding the fabric around the leg and then back over itself along fold lines extending from the top towards the bottom of the bag and stitching through the three widths of fabric and the leg.
Claim 15
Dependent Claim
79 words
A bag for transporting bulk material, the bag having an open top and having four separate lifting loops disposed around the open top, each loop having a bight and two spaced legs, and each leg being secured to the fabric of the bag by folding the fabric around the leg and then back over itself along fold lines extending from the top towards the bottom of the bag and stitching through the three widths of fabric and the leg.
Claim 16
Dependent Claim
36 words
A bag according to claim 13 in which the material of each loop is at least 2 inches wide and the material of the bag has a tensile strength of about 150 kg. per linear inch.
Claim 17
Dependent Claim
25 words
A bag according to claim 13 in which the material of the bag is 15 × 15 per sq. inch woven polypropylene of 2000 denier.
Claim 18
Dependent Claim
21 words
A bag according to claim 13 in which the material of each loop has a breaking load of about 1810 kg..
Claim 19
Dependent Claim
17 words
A bag according to claim 13 in which the material of each loop is woven polyethylene terephthalate.
Claim 20
Dependent Claim
28 words
A bag according to claim 13 in which the filled bag has a shape resembling that of a wide-necked bottle, with a broader base and a tapered top.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-07 | 1980-09-06 | 1981-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-07 | 1984-09-06 | 1985-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-07 | 1988-09-06 | 1989-03-08 | $7700.00 | Window Closed / Lapsed |