US4583266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparation of discontinuous filament bundles and sharp-ended filaments
Assignee: Asahi Kasei Corp
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Filing: 1985-09-09
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Granted: 1986-04-22
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Expires: 2005-09-09
Abstract
Abstract A process for the preparation of discontinuous filament bundles, which comprises applying a drawing force and/or a shearing force to a bundle of continuous filaments while or immediately after contacting the bundle of continuous filaments with a medium maintained at a temperature lower than -5 DEG C. to cut the respective single filaments constituting the bundle. The individual filaments of the resultant bundle may have on at least one terminal thereof a sharp end cut obliquely and an inclination angle alpha of the cut top end to the filament axis of less than 70 DEG .
Inventors
- 👤 Yasuo Tango
- 👤 Makoto Kanazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:29
CPC Classifications
D; D01; D01G; D01G1/00; D01G1/02; D01G1/025; D01G1/027
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
In a process for the preparation of discontinuous filament bundles composed of synthetic fibers by applying a drawing force or a drawing force and supplementary shearing force to a bundle of continuous filaments, the improvement which comprises feeding the bundle in the crimp-retained state, made of crimped acrylic type filaments, into a cooling zone maintained at a temperature from -20° C. to -195° C. before applying the drawing force, whereby the discontinuous filaments of the resisting bundle retain their crimp and the shrinkage is controlled.
Claim 2
Dependent Claim
85 words
In a process for the preparation of discontinuous filament bundles composed of synthetic fibers by applying a drawing force or a drawing force and supplementary shearing force to a bundle of continuous filaments, the improvement which comprises feeding the bundle in the crimp-retained state, made of crimped acrylic type filaments, into a cooling zone maintained at a temperature from -20° C. to -195° C. before applying the drawing force, whereby the discontinuous filaments of the resisting bundle retain their crimp and the shrinkage is controlled.
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) | 1989-04-21 | 1989-10-21 | 1990-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-21 | 1993-10-21 | 1994-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-21 | 1997-10-21 | 1998-04-22 | $7700.00 | Window Closed / Lapsed |