Patent US6441752B1 successfully refreshed from Google Patents.
US4028874A
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US
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Roving and process for its manufacture
Assignee: MAAG FRITJOF DR
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Filing: 1975-10-06
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Granted: 1977-06-14
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Expires: 1995-10-06
Abstract
Abstract A roving is prepared by winding at least one filament yarn around a fiber strand which is untwisted and unsized and has a total titer of from 1,000 to 30,000 dtex. The filament yarn(s) used for winding have an elongation at break of less than 50% and a titer of less than 50 dtex. The length of cohesion of the roving is in the range of from 15 to 500 meters and one meter of the fiber strand is provided with 20 to 300 windings. The roving can be produced in simple manner and it is excellently suitable for the direct spinning of fine yarns.
Inventors
- 👤 Fritjof Maag
- 👤 Friedrich Unger
- 👤 Wilhelm Mohr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:50
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/22; D02G3/38; D02G3/385
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
90 words
A roving consisting of a strand of spun fibers and at least one filament yarn wrapped around said strand, wherein the spun fibers are untwisted and unsized and the strand has a total titer of from about 1,000 to 30,000 dtex and the filament yarn has an elongation at break of less than 50%, the roving has a cohesion length of 15 to 500 meters and the number a wrappings of the filament yarn around the fiber strand is in the range of from 20 to 300 times per meter.
Claim 2
Dependent Claim
90 words
A roving consisting of a strand of spun fibers and at least one filament yarn wrapped around said strand, wherein the spun fibers are untwisted and unsized and the strand has a total titer of from about 1,000 to 30,000 dtex and the filament yarn has an elongation at break of less than 50%, the roving has a cohesion length of 15 to 500 meters and the number a wrappings of the filament yarn around the fiber strand is in the range of from 20 to 300 times per meter.
Claim 3
Dependent Claim
23 words
A roving as claimed in claim 1, wherein two filament yarns are wrapped in opposite direction to each other around the fiber strand.
Claim 4
Dependent Claim
14 words
A roving as claimed in claim 1, wherein the filament yarn is a monofilament.
Claim 5
Dependent Claim
14 words
A roving as claimed in claim 1, wherein the filament yarn is a multifilament.
Claim 6
Dependent Claim
122 words
A process for the manufacture of a roving having a cohesion length of 15 to 500 meters by wrapping at least one filament yarn around an untwisted strand of fibers, said process comprising the steps of, providing a non-consolidated strand of untwisted and unsized staple fibers having a total titer of from about 1,000 to 30,000 dtex, passing said strand through a wrapping station at a delivery speed of over 50 meters per minute, and wrapping at least one filament yarn, having an elongation at break of less than 50% and a titer of less than 50 dtex, around said non-consolidated strand of staple fibers at said wrapping station at the rate of between 30 to 300 wrappings per meter of strand.
Claim 7
Dependent Claim
122 words
A process for the manufacture of a roving having a cohesion length of 15 to 500 meters by wrapping at least one filament yarn around an untwisted strand of fibers, said process comprising the steps of, providing a non-consolidated strand of untwisted and unsized staple fibers having a total titer of from about 1,000 to 30,000 dtex, passing said strand through a wrapping station at a delivery speed of over 50 meters per minute, and wrapping at least one filament yarn, having an elongation at break of less than 50% and a titer of less than 50 dtex, around said non-consolidated strand of staple fibers at said wrapping station at the rate of between 30 to 300 wrappings per meter of strand.
Claim 8
Dependent Claim
38 words
A process as claimed in claim 5, wherein the wrapping of the fiber strand is carried out under tension, so that the filament yarn lies nearer to the core of the fiber strand and the fibers extend outwardly.
Claim 9
Dependent Claim
27 words
A process as claimed in claim 5, including the step of producing a false twist in the fiber strand after the strand passes through said wrapping station.
References Cited (Backward Citations)
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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) | 1980-06-13 | 1980-12-13 | 1981-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-13 | 1984-12-13 | 1985-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-13 | 1988-12-13 | 1989-06-14 | $7700.00 | Window Closed / Lapsed |