US3907729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Short fiber reinforced spindle drive wheel
Assignee: Armstrong World Industries Inc
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Filing: 1974-01-30
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Granted: 1975-09-23
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Expires: 1994-01-30
Abstract
Abstract A drive wheel is used to rotate a texturizing spindle at high speed. The drive wheel is made from a rubber compound containing extremely short reinforcing fibers and a controlled formulation which provides the drive wheel with a modulus of elongation such that the drive wheel will not distort on its outer drive surface at very high speeds.
Inventors
- 👤 David J Burkey
- 👤 William L Mason
- 👤 Jr Robert S Olcott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:31
CPC Classifications
C; C08; C08L; C08L9/00; C08L9/02; C08L97/00; C08L97/02; D; D02; D02G; D02G1/00; D02G1/02; D02G1/04; D02G1/06; C08L61/00; C08L61/04; C08L61/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
63 words
A SPINDLE DRIVE WHEEL FOR DRIVING A FALSE TWIST SPINDLETTE, SAID DRIVE WHEEL BEING ROD SHAPED AND BEING FORMED FROM A VULCANIZED BUTADIENE-ACRYLONITRILE RUBBER COMPOSITION WHICH CONTAINS EXTREMELY SHORT FIBERS OF WOOD CELLULOS MATERIAL HAVING A LENGTH RANGING FROM 76 MICRONS TO 150 MICRONS, SAID RUBBER COMPOSITION BEING APPROXIMATELY 100 PARTS BY WEIGHT WITH SAID CELLULOSE MATERIAL BEING APPROXIMATELY 50-100 PARTS BY WEIGHT,
Claim 2
Dependent Claim
63 words
A SPINDLE DRIVE WHEEL FOR DRIVING A FALSE TWIST SPINDLETTE, SAID DRIVE WHEEL BEING ROD SHAPED AND BEING FORMED FROM A VULCANIZED BUTADIENE-ACRYLONITRILE RUBBER COMPOSITION WHICH CONTAINS EXTREMELY SHORT FIBERS OF WOOD CELLULOS MATERIAL HAVING A LENGTH RANGING FROM 76 MICRONS TO 150 MICRONS, SAID RUBBER COMPOSITION BEING APPROXIMATELY 100 PARTS BY WEIGHT WITH SAID CELLULOSE MATERIAL BEING APPROXIMATELY 50-100 PARTS BY WEIGHT,
Claim 3
Dependent Claim
18 words
A friction material of improved wear life at drive speeds of 450,000 to 600,000 rpm''s consisting essentially of
Claim 4
Dependent Claim
18 words
A friction material of improved wear life at drive speeds of 450,000 to 600,000 rpm''s consisting essentially of
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) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |