US3778995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drafting method
Assignee: Milliken Research Corp
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Filing: 1971-09-09
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Granted: 1973-12-18
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Expires: 1991-09-09
Abstract
Abstract Method of drafting sliver which has at least some of the staple fibers therein longer than the distance between center lines of adjacent pairs of rolls in a drafting system.
Inventors
- 👤 G Sanders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:04
CPC Classifications
D; D01; D01H; D01H5/00; D01H5/18; D01H5/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
228 words
A method of drafting fibers in a drafting system having at least three sets of drafting rolls with each set of rolls having a top roll and bottom roll in nip forming relationship and with the first set of rolls being spaced from the second set of rolls and the second set of rolls being spaced from the third set of rolls with the top rolls of each set having a centerline which is in substantially a straight line relationship with centerlines of the other top rolls of each set comprising the steps of: supplying fiber to be drafted into the nip of the first set of drafting rolls, directing the fiber from the nip of the first set of drafting rolls around at least 90* of the periphery of said first top roll in an upward direction, then directing the fiber downward into the nip of the second set of rolls, directing the fiber from the nip of the second set of rolls around at least 180* of the periphery of the top roll of the second set of rolls and then in a direction toward the first set of rolls, reversing the flow of fibers at least 180* and directing the fiber into the nip of the third set of rolls, and twisting the fibers supplied from the nip of the third set of drafting rolls.
Claim 2
Independent Claim
228 words
A method of drafting fibers in a drafting system having at least three sets of drafting rolls with each set of rolls having a top roll and bottom roll in nip forming relationship and with the first set of rolls being spaced from the second set of rolls and the second set of rolls being spaced from the third set of rolls with the top rolls of each set having a centerline which is in substantially a straight line relationship with centerlines of the other top rolls of each set comprising the steps of: supplying fiber to be drafted into the nip of the first set of drafting rolls, directing the fiber from the nip of the first set of drafting rolls around at least 90* of the periphery of said first top roll in an upward direction, then directing the fiber downward into the nip of the second set of rolls, directing the fiber from the nip of the second set of rolls around at least 180* of the periphery of the top roll of the second set of rolls and then in a direction toward the first set of rolls, reversing the flow of fibers at least 180* and directing the fiber into the nip of the third set of rolls, and twisting the fibers supplied from the nip of the third set of drafting rolls.
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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |