US4710967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double-wall sack made of circular-woven tube with gathered loop
Assignee: SETAFIN SA A CORP OF REP OF PANAMA
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Filing: 1986-11-13
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Granted: 1987-12-01
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Expires: 2006-11-13
Abstract
Abstract A container or bag or sack essentially comprises a tubular fabric, in particular a circular fabric of polyolefines, having a double wall formed by turning in or partially inverting the tubular fabric. In addition, a cut extending downwardly from the folded or turned in edge is provided in the double wall, and the folded or turned in edge thus cut open is gathered or tucked all the way around such that this gathered inner wall-sections of the double wall form a suspension or hanging loop. A suspension loop is thus formed in a relatively simple manner. Practically all the warp threads of the circular fabric unite in the suspension loop, imparting to the sack possessing a load-carrying strength at least equivalent to the tensile strength of the fabric. The lifting strength of the suspension loop is considerably increased by the gathering.
Inventors
- 👤 Goetz Petschner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:42
CPC Classifications
B; B65; B65D; B65D33/00; B65D88/00; B65D88/16; B65D88/1612; B65D88/1618; B65D88/1675; B65D88/1681; Y; Y10; Y10S; Y10S206/00; Y10S206/806
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
131 words
A sack comprising: a circularly woven fabric tube having an outer portion and an inner portion unitarily joined thereto at a fold, the inner portion lying within the outer portion and extending the full length thereof from the fold, the portions having lower ends spaced from the fold; means for connecting the lower ends together to form a sack bottom, the tube being formed with a single cut in both portions extending across the fold and toward the sack bottom, the cut forming a pair of adjacent openings between the portions; and means extending through the cut between the portions along the full length of the fold for gathering the tube to form a suspension loop and to form a filling mouth opening laterally at the openings into the inner portion.
Claim 2
Dependent Claim
131 words
A sack comprising: a circularly woven fabric tube having an outer portion and an inner portion unitarily joined thereto at a fold, the inner portion lying within the outer portion and extending the full length thereof from the fold, the portions having lower ends spaced from the fold; means for connecting the lower ends together to form a sack bottom, the tube being formed with a single cut in both portions extending across the fold and toward the sack bottom, the cut forming a pair of adjacent openings between the portions; and means extending through the cut between the portions along the full length of the fold for gathering the tube to form a suspension loop and to form a filling mouth opening laterally at the openings into the inner portion.
Claim 3
Dependent Claim
33 words
The sack defined in claim 1, further comprising an inner bag of polyethylene film received in the tube and having a filling opening adapted to extend sideways from the tube through the mouth.
Claim 4
Dependent Claim
25 words
The sack defined in claim 2 wherein the connecting means binds the inner and outer portions together with the inner bag at the sack bottom.
Claim 5
Dependent Claim
24 words
The sack defined in claim 2 wherein the connecting means is a tie surrounding both portions and the inner bag at the sack bottom.
Claim 6
Dependent Claim
16 words
The sack defined in claim 1 wherein the means extending through the cut is a tape.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-11-30 | 1991-06-01 | 1991-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-30 | 1995-06-01 | 1995-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-30 | 1999-06-01 | 1999-12-01 | $7700.00 | Window Closed / Lapsed |