Patent US4263790A successfully refreshed from Google Patents.
US4263790A
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US
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Method for knitting and severing synthetic pile loop fabrics
Assignee: Individual
•
Filing: 1977-03-07
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Granted: 1981-04-28
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Expires: 1997-03-07
Abstract
Abstract Method of severing fibrous material, comprising contacting the fibrous material with a moving cutting member constituted of particles of an abrasive material and a high polymeric binder.
Inventors
- 👤 Fritz Stopp
- 👤 Heinz Lindner
- 👤 Gerhard Haas
- 👤 Werner Oehm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:14
CPC Classifications
D; D04; D04B; D04B23/00; D04B23/08; D04B35/00; D04B35/34
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
94 words
A method of producing a pile material which comprises producing, from synthetic fiber, a fabric having a plurality of pile loops on a pile knitting machine, continuously delivering the fabric as it is produced through a pile severing zone and severing the loops cleanly and uniformly by abrading them with the outer periphery of a rotating grinding member constituted of particles of an abrasive material with a high polymeric binder, said abrasive member being rotated at a peripheral speed of between about 1.5 and about 3.0 meters per second relative to the pile yarn.
Claim 2
Independent Claim
94 words
A method of producing a pile material which comprises producing, from synthetic fiber, a fabric having a plurality of pile loops on a pile knitting machine, continuously delivering the fabric as it is produced through a pile severing zone and severing the loops cleanly and uniformly by abrading them with the outer periphery of a rotating grinding member constituted of particles of an abrasive material with a high polymeric binder, said abrasive member being rotated at a peripheral speed of between about 1.5 and about 3.0 meters per second relative to the pile yarn.
Claim 3
Dependent Claim
34 words
Method according to claim 1, in which the abrasive material is corundum and the binder is hard rubber, the corundum constituting 70 to 95% of the total weight of the corundum and hard rubber.
Claim 4
Dependent Claim
27 words
Method according to claim 1, in which the pile yarn is a polyamide and said speed of the abrasive member is 2.0 to 2.4 meters per second.
Claim 5
Dependent Claim
23 words
Method according to claim 1, in which the abrasive member has a grinding edge having an angle of 30 degrees to 45 degrees.
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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) | 1984-04-27 | 1984-10-27 | 1985-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-27 | 1988-10-27 | 1989-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-27 | 1992-10-27 | 1993-04-28 | $7700.00 | Window Closed / Lapsed |