US4475693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing glass fiber product
Assignee: TBA Industrial Products Ltd
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Filing: 1982-09-27
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Granted: 1984-10-09
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Expires: 2002-09-27
Abstract
Abstract Continuous multifilament glass fiber roving of from 300 to 10,000 tex is rendered catenary-free without twisted by passing it at from 150 to 300 meters/minute through an air treatment zone in which it is exposed to air at from 400 to 600 KN/meter 2 at a volume throughput of from 0.5 to 1.5 cubic meters/minute, the air treatment being carried out in the absence of positive overfeed whereby there is no bulking of the roving, followed by winding the treated roving into a package.
Inventors
- 👤 Alexander Munro
- 👤 Lester Entwisle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:46
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/02; D02G3/16; D02G3/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
127 words
A method of producing an essentially catenary-free, untwisted, continuous multifilament glass fiber roving, the method comprising the successive steps of: (1) withdrawing individual continuous multifilament glass fiber strands from each of a plurality of creel packages; (2) assembling them side-by-side to form a single roving of linear density 300 to 10,000 tex; (3) passing said roving at a rate of from 150 to 300 meters/minute without positive overfeed, whereby there is no bulking thereof, through a relatively confined air treatment passageway; (4) introducing air into said passageway generally normally with respect to the direction of passage of the roving at 0.5 to 1.5 cubic meters/minute under a pessure of from 400 to 600 KN/meter 2 , followed by, (5) winding the thus treated roving into a package.
Claim 2
Independent Claim
127 words
A method of producing an essentially catenary-free, untwisted, continuous multifilament glass fiber roving, the method comprising the successive steps of: (1) withdrawing individual continuous multifilament glass fiber strands from each of a plurality of creel packages; (2) assembling them side-by-side to form a single roving of linear density 300 to 10,000 tex; (3) passing said roving at a rate of from 150 to 300 meters/minute without positive overfeed, whereby there is no bulking thereof, through a relatively confined air treatment passageway; (4) introducing air into said passageway generally normally with respect to the direction of passage of the roving at 0.5 to 1.5 cubic meters/minute under a pessure of from 400 to 600 KN/meter 2 , followed by, (5) winding the thus treated roving into a package.
Claim 3
Dependent Claim
54 words
The method of claim 1 including the steps of: passing said roving through an open-end V-shaped trough which is in use closed by a lid to define said relatively confined air treatment passageway; and introducing air through an aperture in the base of the V located approximately halfway between the ends of the trough.
Claim 4
Dependent Claim
33 words
The method of claim 1 including the step of: the final package winding step providing all the motive power for the withdrawing, assembly and passing said roving through said air treatment passageway steps.
References Cited (Backward Citations)
US2985995A
Cited
US3249312A
Cited
US3364537A
Cited
US3361375A
Cited
US4074871A
Cited
JPS53139846A
Cited
US4147020A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-09 | 1988-04-09 | 1988-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-09 | 1992-04-09 | 1992-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-09 | 1996-04-09 | 1996-10-09 | $7700.00 | Window Closed / Lapsed |