US3825975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming a sliver from a fiber web produced in a card
Assignee: Maschinenfabrik Rieter AG
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Filing: 1973-01-15
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Granted: 1974-07-30
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Expires: 1993-01-15
Abstract
Abstract A method of forming a sliver from a fiber web produced in a card which comprises the steps of subjecting the formed web immediately after it is withdrawn to a precondensing action or preliminary condensation by laterally collecting the web towards the middle thereof, and subsequently condensing such web into a sliver by means of a known type of condensing device to essentially complete the formation. The invention also pertains to apparatus for forming a sliver in accordance with the aforesaid inventive method wherein a sliver condensing device is arranged after a web take-off device of the card, and between the web take-off device and the sliver condensing device there is provided movable precondensing means in the form of at least one substantially cylindrical-type roller or having at least one substantially cylindrical circumferential precondensing surface disposed in a plane which is in substantially perpendicular relationship with respect to the plane in which the web moves for forming a precondensed strand of fibers by laterally collecting the fiber web.
Inventors
- 👤 P Staeheli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:14
CPC Classifications
D; D01; D01G; D01G15/00; D01G15/02; D01G15/12; D01G15/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
267 words
An apparatus for forming a sliver from a fiber web produced at a card possessing a web delivery side, comprising a web takeoff device arranged at the web delivery side of the card and a sliver condensing device arranged after said web take-off device and extending to both sides of the longitudinal centerline of the card, movable substantially cylindrical precondensing means for forming a precondensed strand of fibers by laterally collecting and partially compacting the fiber web substantially across its entire width, said substantially cylindrical precondensing means being located in a precondensing zone for the web and disposed between said web take-off device and said sliver condensing device and in close proximity to the longitudinal axis of the card, a support element provided with a support surface for the fiber web located at the web delivery side of the card, said take-off device comprising a pair of web take-off rolls, said support element extending from said pair of web take-off rolls at least substantially across the full width of the precondensing zone between said take-off device and said precondensing means, said precondensing means being effective at an operable zone and said support element together with its support surface merges into said operable zone of said precondensing means immediately above a lower edge of said precondensing means, said support element together with its support surface being divided into at least two support sections in the direction of travel of the web, means for pivotably mounting at least one of said support sections, and actuating means for periodically automatically tilting the pivotably mounted support section of the support element.
Claim 2
Independent Claim
267 words
An apparatus for forming a sliver from a fiber web produced at a card possessing a web delivery side, comprising a web takeoff device arranged at the web delivery side of the card and a sliver condensing device arranged after said web take-off device and extending to both sides of the longitudinal centerline of the card, movable substantially cylindrical precondensing means for forming a precondensed strand of fibers by laterally collecting and partially compacting the fiber web substantially across its entire width, said substantially cylindrical precondensing means being located in a precondensing zone for the web and disposed between said web take-off device and said sliver condensing device and in close proximity to the longitudinal axis of the card, a support element provided with a support surface for the fiber web located at the web delivery side of the card, said take-off device comprising a pair of web take-off rolls, said support element extending from said pair of web take-off rolls at least substantially across the full width of the precondensing zone between said take-off device and said precondensing means, said precondensing means being effective at an operable zone and said support element together with its support surface merges into said operable zone of said precondensing means immediately above a lower edge of said precondensing means, said support element together with its support surface being divided into at least two support sections in the direction of travel of the web, means for pivotably mounting at least one of said support sections, and actuating means for periodically automatically tilting the pivotably mounted support section of the support element.
References Cited (Backward Citations)
US775804A
Cited
FR17801E
Cited
US2326331A
Cited
US2795010A
Cited
US3113348A
Cited
US3345700A
Cited
GB1155598A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-29 | 1978-01-28 | 1978-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-29 | 1982-01-28 | 1982-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-29 | 1986-01-28 | 1986-07-30 | $7700.00 | Window Closed / Lapsed |