US3626441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester sewing thread
Assignee: Dixie Group Inc
•
Filing: 1969-10-10
•
Granted: 1971-12-07
•
Expires: 1989-10-10
Abstract
Abstract This specification discloses a sewing thread spun from stable lengths of polyester fiber produced by repeated breaking under tension.
Inventors
- 👤 Walter Wayne Freed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:36
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/44; D02G3/46; Y; Y10; Y10S; Y10S57/00; Y10S57/903
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
17 words
A thread as claimed in claim 1 in which the singles twist multiplier is below about 3.00.
Claim 2
Dependent Claim
59 words
A sewing thread having a denier between about 150 and 1,000 consisting of spun, stretched broken polyester fibers of random length in the range between about 35 and 160 millimeters, each fiber having undergone a reduction in denier by cold elongation, said thread being characterized by an initial modulus equivalent to cotton and a low yarn twist singles multiplier.
Claim 3
Dependent Claim
25 words
A sewing thread as claimed in claim 3 in which the distribution of fiber lengths is in accordance with the curve of the following graph:
Claim 4
Dependent Claim
15 words
A sewing thread as claimed in claim 1 in which the thread is heat stabilized.
Claim 5
Dependent Claim
15 words
A sewing thread as claimed in claim 3 in which the thread is heat stabilized.
Claim 6
Independent Claim
51 words
A method of manufacturing a sewing thread that comprises cold stretching a plurality of continuous polyester filaments to the breaking point a large number of times to produce stretched staple lengths of from about 35 to about 160 mm., spinning a thread therefrom having a singles yarn twist multiplier below 3.00.
Claim 7
Dependent Claim
25 words
A method of manufacturing a sewing thread as described in claim 7 but further comprising heat treating the thread under tension at about 375* F.
References Cited (Backward Citations)
CA464727A
Cited
FR757025A
Cited
US2245191A
Cited
US2366785A
Cited
US2492306A
Cited
GB734937A
Cited
US2797444A
Cited
US3466861A
Cited
US3407590A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |