Patent US3975200A successfully refreshed from Google Patents.
US3975200A
Expired / Lapsed
US
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Moulding for the heat retention of feeder head in casting molten metals
Assignee: Aikoh Co Ltd
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Filing: 1974-04-11
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Granted: 1976-08-17
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Expires: 1994-04-11
Abstract
Abstract A moulding for the heat retention of feeder head top surface in casting molten metals is based on a mixture consisting of charcoal and a binder, and said charcoal is laminated with directional properties in the lateral direction. If circumstances require, the moulding may contain at least one component selected from the group consisting of thermo-expansible materials, organic binders and organic fibrous materials, and further when occasion demands it may be coated with a shell containing fibrous materials and a binder.
Inventors
- 👤 Masaru Takashima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:52
CPC Classifications
B; B22; B22D; B22D27/00; B22D27/04; B22D27/06; B22D7/00; B22D7/06; B22D7/10; B22D9/00; B22D9/006
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
124 words
A thermally expandable moulding for the heat retention of feeder head top surface comprising about 3 to 15% by weight of an organic binder, about 3 to 15% by weight of organic fibrous material, and the remainder consisting of a mixture of (i) pulverized charcoal which entirely passes through 10 mm. sieve and (ii) a thermo-expansible material selected from the group consisting of vermiculite, thermo-expansible graphite and mixtures thereof, the proportion by weight between said pulverized charcoal and said thermo-expansible material is 1:0.07 - 0.20 when the particle size of the pulverized charcoal is in the range from 10 mm. to 2 mm., and the proportion is 1:0.10 - 0.40 when the particle size of the pulverized charcoal is not more than 2 mm.
Claim 2
Dependent Claim
124 words
A thermally expandable moulding for the heat retention of feeder head top surface comprising about 3 to 15% by weight of an organic binder, about 3 to 15% by weight of organic fibrous material, and the remainder consisting of a mixture of (i) pulverized charcoal which entirely passes through 10 mm. sieve and (ii) a thermo-expansible material selected from the group consisting of vermiculite, thermo-expansible graphite and mixtures thereof, the proportion by weight between said pulverized charcoal and said thermo-expansible material is 1:0.07 - 0.20 when the particle size of the pulverized charcoal is in the range from 10 mm. to 2 mm., and the proportion is 1:0.10 - 0.40 when the particle size of the pulverized charcoal is not more than 2 mm.
Claim 3
Dependent Claim
33 words
The thermally expandable molding of claim 1 wherein not more than 30% of said pulverized charcoal is replaced by a material selected from the group consisting of coal, coke, graphite and mixtures thereof.
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) | 1979-08-17 | 1980-02-16 | 1980-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-17 | 1984-02-16 | 1984-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-17 | 1988-02-16 | 1988-08-17 | $7700.00 | Window Closed / Lapsed |