Patent US3673897A successfully refreshed from Google Patents.
US3673897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of machining a friction roller
Assignee: IHO Holding GmbH and Co KG
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Filing: 1970-01-05
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Granted: 1972-07-04
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Expires: 1990-01-05
Abstract
Abstract A friction roller and a method for producing a friction roller suitable for driving a spinning or twisting tube at high rotational speeds, the roller having tube-engaging driving surfaces formed of a wear-resistant resilient synthetic resin (such as polyurethane), the method comprising finishing the driving surfaces of the roller by machining them while the roller is being rotated at the maximum expected driving speed, which may be of the order of 30,000 to 40,000 r.p.m.
Inventors
- 👤 Hans Gassner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:47
CPC Classifications
D; D01; D01H; D01H1/00; D01H1/14; D01H1/20; D01H1/24; D01H1/243; Y; Y10; Y10T; Y10T82/00; Y10T82/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
69 words
In a method for producing a friction roller suitable for driving a spinning or twisting tube at very high rotational speeds, the roller having tube-engaging driving surfaces which are formed of a wear-resistant resilient synthetic resin, the improvement comprising the steps of: rotating said roller at a speed of at least 30,000 r.p.m. and machining the driving surfaces of said roller to a finished state during said rotating step.
Claim 2
Dependent Claim
69 words
In a method for producing a friction roller suitable for driving a spinning or twisting tube at very high rotational speeds, the roller having tube-engaging driving surfaces which are formed of a wear-resistant resilient synthetic resin, the improvement comprising the steps of: rotating said roller at a speed of at least 30,000 r.p.m. and machining the driving surfaces of said roller to a finished state during said rotating step.
Claim 3
Dependent Claim
21 words
A method according to claim 1 wherein the roller is rotated during the finishing step at a speed over 30,000 r.p.m.
Claim 4
Dependent Claim
16 words
A method according to claim 1 wherein the driving surfaces are machined by a diamond tool.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |