US4263790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for knitting and severing synthetic pile loop fabrics
Assignee: Individual
•
Filing: 1977-03-07
•
Granted: 1981-04-28
•
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 23:03
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.
References Cited (Backward Citations)
US447226A
Cited
US857356A
Cited
US1969497A
Cited
CH136621A
Cited
US2022893A
Cited
US2177940A
Cited
US2986455A
Cited
US3032404A
Cited
US3341386A
Cited
JPS4825390A
Cited
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 |