Patent US4550478A successfully refreshed from Google Patents.
US4550478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-ply spinning cots
Assignee: Armstrong World Industries Inc
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Filing: 1981-08-04
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Granted: 1985-11-05
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Expires: 2001-08-04
Abstract
Abstract The present invention comprises a two-ply spinning cot having a relatively hard outer layer and a relatively soft inner layer. A two-ply cot constructed according to this invention will exhibit the resistance to lapping demonstrated by hard cots, yet will produce high quality yarn normally obtainable only by using soft cots.
Inventors
- 👤 Robert S. Olcott, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:11
CPC Classifications
D; D01; D01H; D01H5/00; D01H5/18; D01H5/70; D01H5/74; D01H5/80; B; B29; B29D; B29D99/00; B29D99/0032; B29D99/0035; B29L; B29L2031/00; B29L2031/32; B29L2031/324
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
127 words
A two-ply spinning cot for mounting on an arbor of a spinning frame said cot comprising: an inner layer comprising a resilient rubber composition, said inner layer having a hole disposed approximately axially through the center thereof to receive said arbor and having a Shore A hardness of from about 50 to 70, and an outer layer comprising a butadiene-acrylonitrile rubber composition, said outer layer being bonded to said inner layer and having a Shore A hardness of from about 70 to 85, said inner layer comprising from about 3/4 to 1/3 of the total thickness of said inner and outer layers, and said outer layer comprising from about 1/4 to 2/3 of said total thickness, said inner and outer layers having different Shore A hardness values.
Claim 2
Dependent Claim
127 words
A two-ply spinning cot for mounting on an arbor of a spinning frame said cot comprising: an inner layer comprising a resilient rubber composition, said inner layer having a hole disposed approximately axially through the center thereof to receive said arbor and having a Shore A hardness of from about 50 to 70, and an outer layer comprising a butadiene-acrylonitrile rubber composition, said outer layer being bonded to said inner layer and having a Shore A hardness of from about 70 to 85, said inner layer comprising from about 3/4 to 1/3 of the total thickness of said inner and outer layers, and said outer layer comprising from about 1/4 to 2/3 of said total thickness, said inner and outer layers having different Shore A hardness values.
Claim 3
Dependent Claim
27 words
The invention as set forth in claim 1 wherein said hole is of suitable size to receive an arbor comprising a diameter of from 3/8" to 11/8".
Claim 4
Dependent Claim
35 words
The invention as set forth in claim 2 wherein said inner layer comprises about 3/4 to 1/2 of the total wall thickness and said outer layer comprises about 1/4 to 1/2 of said total thickness.
Claim 5
Dependent Claim
38 words
The invention as set forth in claim 2 wherein said inner layer has a Shore A hardness of from about 55 to 65 and said outer layer has a Shore A hardness of from about 75 to 85.
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) | 1988-11-04 | 1989-05-06 | 1989-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-04 | 1993-05-06 | 1993-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-04 | 1997-05-06 | 1997-11-05 | $7700.00 | Window Closed / Lapsed |