Patent US3961736A successfully refreshed from Google Patents.
US3961736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber-covered self-centering rolls
Assignee: RYMAN ENGR Co
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Filing: 1975-05-09
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Granted: 1976-06-08
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Expires: 1995-05-09
Abstract
Abstract A self-centering roll includes a body, a first layer of rubber surrounding the body, and a second layer of rubber surrounding the first layer, the rubber on the first layer being softer and of lower density than the rubber in the second layer. Flexible projections are formed in the second layer of rubber on each side of the transverse center of the roll extending outwardly from the roll body toward the transverse center of the roll.
Inventors
- 👤 James J. Fatula
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:12
CPC Classifications
B; B65; B65H; B65H27/00; B65H2404/00; B65H2404/10; B65H2404/13; B65H2404/131; B65H2404/1316; B65H2404/13162; B65H2404/16; B65H2404/164
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
78 words
In a self-centering roll having a body and flexible projections on each side of the transverse center of the roll extending outwardly from the body toward said transverse center; the improvement comprising a first layer of rubber surrounding said body, and a second layer of rubber surrounding said first layer, the rubber in said first layer being softer and of lower density than the rubber in said second layer, said flexible projections being formed in said second layer.
Claim 2
Dependent Claim
78 words
In a self-centering roll having a body and flexible projections on each side of the transverse center of the roll extending outwardly from the body toward said transverse center; the improvement comprising a first layer of rubber surrounding said body, and a second layer of rubber surrounding said first layer, the rubber in said first layer being softer and of lower density than the rubber in said second layer, said flexible projections being formed in said second layer.
Claim 3
Dependent Claim
27 words
The combination of claim 1 in which said flexible projections extend from the outside surface of said first layer to the outside surface of said second layer.
Claim 4
Dependent Claim
19 words
The combination of claim 1 in which said projections are spaced apart so as to form a slot therebetween.
Claim 5
Dependent Claim
27 words
The combination of claim 3 in which said flexible projections extend from the outside surface of said first layer to the outside surface of said second layer.
Claim 6
Dependent Claim
28 words
The combination of claim 1 in which the rubber in said first layer is approximately 35 durometer and the rubber in said second layer is approximately 65 durometer.
Claim 7
Dependent Claim
27 words
The combination of claim 5 in which said flexible projections extend from the outside surface of said first layer to the outside surface of said second layer.
Claim 8
Dependent Claim
19 words
The combination of claim 5 in which said projections are spaced apart so as to form a slot therebetween.
Claim 9
Dependent Claim
27 words
The combination of claim 7 in which said flexible projections extend from the outside surface of said first layer to the outside surface of said second layer.
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) | 1979-06-08 | 1979-12-08 | 1980-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-08 | 1983-12-08 | 1984-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-08 | 1987-12-08 | 1988-06-08 | $7700.00 | Window Closed / Lapsed |