Patent US3753276A successfully refreshed from Google Patents.
US3753276A
Expired / Lapsed
US
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Calender roll cover
Assignee: Individual
•
Filing: 1971-12-27
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Granted: 1973-08-21
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Expires: 1991-12-27
Abstract
Abstract A calender roll comprising a polymeric roll cover adapted to be secured in frictional engagement with a rigid mandrel under static conditions is provided that will permit relative movement between the roll and the cover under operating conditions.
Inventors
- 👤 K Reisch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:19
CPC Classifications
F; F16; F16C; F16C13/00; D; D06; D06C; D06C15/00; D06C15/08; D21; D21G; D21G1/00; D21G1/02; D21G1/0233; F16C2340/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
92 words
A roll adapted for calendering a continuous web of material comprising a mandrel and a tubular cover mounted directly over the mandrel by means of an interference fit between the inside diameter of the cover and the outside diameter of the mandrel, the amount of the interference being sufficient to cause the cover and the mandrel to be in secure frictional engagement with each other at normal room temperatures but insufficient to prevent axial movement of the cover relative to the mandrel at elevated operational temperatures at which the roll is used.
Claim 2
Dependent Claim
92 words
A roll adapted for calendering a continuous web of material comprising a mandrel and a tubular cover mounted directly over the mandrel by means of an interference fit between the inside diameter of the cover and the outside diameter of the mandrel, the amount of the interference being sufficient to cause the cover and the mandrel to be in secure frictional engagement with each other at normal room temperatures but insufficient to prevent axial movement of the cover relative to the mandrel at elevated operational temperatures at which the roll is used.
Claim 3
Dependent Claim
19 words
A roll according to claim 1 wherein the elevated operational temperature exceeds normal room temperature by at least 25*F.
Claim 4
Dependent Claim
14 words
A roll according to claim 1 wherein the cover is a synthetic polymeric material.
Claim 5
Dependent Claim
21 words
A roll according to claim 2 wherein the synthetic polymeric material is selected from the group consisting of polycarbonates and polyamides.
Claim 6
Dependent Claim
20 words
A roll according to claim 1 wherein means are provided to lubricate the interface between the cover and the mandrel.
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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |