Patent US4659616A successfully refreshed from Google Patents.
US4659616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fiber material for the manufacture of coatings for elastic calender rolls and improved calender rolls
Assignee: Individual
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Filing: 1985-12-20
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Granted: 1987-04-21
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Expires: 2005-12-20
Abstract
Abstract The present invention relates to a fibrous material for coating supercalender rolls to improve the resistance to scorching, the fibrous material containing conventional fibers in combination with carbon fibers. An improved heat dissipation inside the roll is achieved without loss of physical properties of the roll coatings. A small percentage of lampblack can also be added to the fibrous material. The invention also relates to an improved elastic supercalender roll which is coated with such a fibrous material.
Inventors
- 👤 Dieter Cordier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:46
CPC Classifications
D; D21; D21G; D21G1/00; D21G1/02; D21G1/0233; D21G1/024; D21H; D21H13/00; D21H13/36; D21H13/46; D21H13/50; Y; Y10; Y10S; Y10S428/00; Y10S428/906; Y10S428/909; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T442/00; Y10T442/50; Y10T442/51; Y10T442/53
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
50 words
An elastic supercalender roll for glazing paper comprising a core and a surface surrounding said core composed of highly axially compressed fiber web material in the form of consolidated individual pieces of cellulosic fibers each containing a sufficient amount of carbon fibers to improve the scorching resistance of the surface.
Claim 2
Dependent Claim
50 words
An elastic supercalender roll for glazing paper comprising a core and a surface surrounding said core composed of highly axially compressed fiber web material in the form of consolidated individual pieces of cellulosic fibers each containing a sufficient amount of carbon fibers to improve the scorching resistance of the surface.
Claim 3
Dependent Claim
24 words
A roll according to claim 1 in which the carbon fibers constitute between 2 and 15% by weight of the overall fiber web material.
Claim 4
Dependent Claim
31 words
A roll according to claim 2 in which said surface also contains an electrically conductive lampblack in an amount of from 0.5 to 10% by weight of the overall fiber material.
Claim 5
Dependent Claim
24 words
A roll according to claim 1 wherein the proportion of carbon fibers amounts to 3 to 12% by weight of said fiber web material.
Claim 6
Dependent Claim
23 words
A roll according to claim 1 wherein the fibers of said web material other than the carbon fibers consist essentially of cotton fibers.
Claim 7
Dependent Claim
30 words
A roll according to claim 1 wherein the fibers other than the carbon fibers consist essentially of of cotton linters and wool in a weight ratio of 7:3 to 9:1.
Claim 8
Dependent Claim
20 words
A roll according to claim 1 which also includes asbestos fibers in an amount of up to 50% by weight.
Claim 9
Dependent Claim
68 words
An elastic supercalender roll comprising a core and a filling surrounding said core, said coating being resistant to burn-out and comprising a paper type web composed of a felted mixture of cellulosic fibers and carbon fibers, the lengths and thicknesses of said carbon fibers approximating those of said cellulosic fibers, said carbon fibers being present in an amount of 1.5 to 15% by weight of said felted mixture.
Claim 10
Dependent Claim
68 words
An elastic supercalender roll comprising a core and a filling surrounding said core, said coating being resistant to burn-out and comprising a paper type web composed of a felted mixture of cellulosic fibers and carbon fibers, the lengths and thicknesses of said carbon fibers approximating those of said cellulosic fibers, said carbon fibers being present in an amount of 1.5 to 15% by weight of said felted mixture.
Claim 11
Dependent Claim
26 words
A roll according to claim 8 wherein said carbon fibers have a length of about 3 mm and a diameter of about 5 to 10 microns.
References Cited (Backward Citations)
US4256801A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-20 | 1990-10-20 | 1991-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-20 | 1994-10-20 | 1995-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-20 | 1998-10-20 | 1999-04-21 | $7700.00 | Window Closed / Lapsed |