Patent US4537491A successfully refreshed from Google Patents.
Patent US3942223A successfully refreshed from Google Patents.
US3942223A
Expired / Lapsed
US
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Staple draft devices
Assignee: Alsacienne de Constructions Mecaniques SA
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Filing: 1974-03-11
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Granted: 1976-03-09
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Expires: 1994-03-11
Abstract
Abstract This invention relates to a staple draft device comprising a pair of feed rollers and a pair of drawing-off rollers, said pairs determining therebetween the course of a staple lap to be drawn off, there being at one side of said course a feed roller with needle-like projections and a control roller also with such projections, and at the other side of said course a supplementary needled-surface roller which co-operates solely with said needled-surface feed roller, and a single levelling-down roller which is smooth, co-operates solely with said needled-surface control roller, and is preferably positively driven at an angular speed such that the peripheral speeds of said levelling-down and control rollers with needle-like projections are equal.
Inventors
- 👤 Gauvain Roger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:14
CPC Classifications
D; D01; D01H; D01H5/00; D01H5/18; D01H5/22; D01H5/24
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
144 words
A device for drawing textile fibers, comprising a pair of feed rollers and a pair of drawing rollers said pairs determining therebetween the course of a staple lap to be drafted; a toothed feed roller and a toothed control roller at one side of said course; a supplementary toothed roller and a single levelling-down roller at the other side of said course; said supplementary toothed roller being situated rearwardly of said toothed feed roller in relation to the direction of progress of a staple lap through said device, and being positioned to form a nip solely with said toothed feed roller; said single leveling-down roller being smooth surfaced and positioned a short distance upstream relative to said toothed control roller in relation to the direction of progress of a staple lap through said device while forming a nip solely with said toothed control roller.
Claim 2
Independent Claim
144 words
A device for drawing textile fibers, comprising a pair of feed rollers and a pair of drawing rollers said pairs determining therebetween the course of a staple lap to be drafted; a toothed feed roller and a toothed control roller at one side of said course; a supplementary toothed roller and a single levelling-down roller at the other side of said course; said supplementary toothed roller being situated rearwardly of said toothed feed roller in relation to the direction of progress of a staple lap through said device, and being positioned to form a nip solely with said toothed feed roller; said single leveling-down roller being smooth surfaced and positioned a short distance upstream relative to said toothed control roller in relation to the direction of progress of a staple lap through said device while forming a nip solely with said toothed control roller.
Claim 3
Dependent Claim
44 words
A device for drawing textile fibers as claimed in claim 1, wherein a geometrical plane tangent both to said levelling-down roller and to said drawing rollers cuts the outer cylindrical surface of said toothed control roller to a depth between 0.5 and 10 mm.
Claim 4
Dependent Claim
39 words
A device for drawing textile fibers as claimed in claim 1 wherein said supplementary toothed roller is situated rearwardly of said toothed feed roller a distance at least equal to one quarter the diameter of said supplemental toothed roller.
References Cited (Backward Citations)
US460083A
Cited
DE94895C
Cited
GB264574A
Cited
US2219666A
Cited
US2644988A
Cited
US3417436A
Cited
DD94895A5
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-09 | 1979-09-08 | 1980-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-09 | 1983-09-08 | 1984-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-09 | 1987-09-08 | 1988-03-09 | $7700.00 | Window Closed / Lapsed |