US4416043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disc roll
Assignee: Nichias Corp
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Filing: 1981-05-08
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Granted: 1983-11-22
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Expires: 2001-05-08
Abstract
Abstract This invention relates to a disk roll characterized in that the flaky vermiculite particles obtained by pulverizing the expanded vermiculite, which may be optionally mixed with a fiber material, are dispersed in water and filtered to form a thin sheet as a starting material for disk roll.
Inventors
- 👤 Susumu Aoki
- 👤 Hiroshi Asaumi
- 👤 Shigeo Take
- 👤 Masazumi Akase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:10
CPC Classifications
F; F27; F27D; F27D3/00; F27D3/02; F27D3/026; B; B21; B21B; B21B39/00; B21B39/008
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
75 words
A disk roll made of a thin sheet, said thin sheet being prepared from a mixture of flaky vermiculite particles having a diameter of 1 mm or less and a thickness of 100μ or less obtained by pulverizing expanded vermiculite with 40 to 230% weight, on the basis of the amount of vermiculite, of wallastonite fibers having a length of 3 mm or less in accordance with the sheet-forming process of a paper making technique.
Claim 2
Dependent Claim
75 words
A disk roll made of a thin sheet, said thin sheet being prepared from a mixture of flaky vermiculite particles having a diameter of 1 mm or less and a thickness of 100μ or less obtained by pulverizing expanded vermiculite with 40 to 230% weight, on the basis of the amount of vermiculite, of wallastonite fibers having a length of 3 mm or less in accordance with the sheet-forming process of a paper making technique.
Claim 3
Dependent Claim
85 words
A disk roll made of vermiculite, said disk roll produced by pulverizing expanded vermiculite particles into flakes having a particle size of 1 mm or less and a thickness less than 100μ, dispersing said vermiculite particles into water, filtering said particles to form a thin sheet and drying by a paper making technique, punching the sheets into rings, fitting a series of rings to a desired thickness successively onto an iron or steel axis and subjecting the rings to compression to form the disk roll.
Claim 4
Dependent Claim
85 words
A disk roll made of vermiculite, said disk roll produced by pulverizing expanded vermiculite particles into flakes having a particle size of 1 mm or less and a thickness less than 100μ, dispersing said vermiculite particles into water, filtering said particles to form a thin sheet and drying by a paper making technique, punching the sheets into rings, fitting a series of rings to a desired thickness successively onto an iron or steel axis and subjecting the rings to compression to form the disk roll.
Claim 5
Dependent Claim
19 words
A disk roll according to claim 2 wherein the compression is within the range of 50-250 kg/cm 2 .
Claim 6
Dependent Claim
21 words
A disk roll according to claim 2 wherein the disk roll has a bulk density of from 1.2-1.8 g/cm 3 .
Claim 7
Dependent Claim
39 words
A disk roll according to claim 2 wherein the vermiculite flakes are mixed with 40 to 230% by weight of wollastonite fibers, based on the weight of the vermiculite, said fibers having a length of 3 mm or less.
Claim 8
Dependent Claim
40 words
A disk roll according to claim 2 wherein the vermiculite flakes are mixed with ceramic fibers selected from the group consisting of crystalline alumina fibers or silica fibers in the range of 10-100%, based on the weight of the vermiculite.
References Cited (Backward Citations)
GB1278473A
Cited
US3852862A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-21 | 1987-05-23 | 1987-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-21 | 1991-05-23 | 1991-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-21 | 1995-05-23 | 1995-11-22 | $7700.00 | Window Closed / Lapsed |