US3646992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for heating pressing plates of continuous flat press
Assignee: Kanegafuchi Spinning Co Ltd
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Filing: 1969-12-19
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Granted: 1972-03-07
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Expires: 1989-12-19
Abstract
Abstract Method for heating pressing plates of a continuous flat press for maintaining surface temperature thereof below 100* C. by utilizing steam. The inside pressure of a conduit disposed in said pressing plate is maintained at a predetermined pressure below an atmospheric pressure while supplying steam into said conduit. And it is preferably applied for carrying out the present method that the partial pressure of air in said conduit is discharged before supplying said steam into said conduit.
Inventors
- 👤 Kazutomo Ishizawa
- 👤 Yasunori Nagata
- 👤 Junnosuke Abe
- 👤 Akira Fukuoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:30
CPC Classifications
D; D06; D06C; D06C15/00; D06C15/10; D06C2700/00; D06C2700/17
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
136 words
An improved method of heating a pressing plate of a continuous flat press provided with at least one conduit formed therein for flowing a heating medium through said flat press, and provided with a steam trap having an input connected to said conduit, and of maintaining said pressing plate at a predetermined temperature below 100* C., comprising the steps of discharging air from said conduit, supplying steam into said conduit, discharging said steam and drain liquid produced in said conduit from said conduit through said steam trap while maintaining the inside pressure of said conduit at a predetermined pressure below atmospheric pressure, and decreasing the pressure at an output of said steam trap to a pressure lower than said conduit pressure by at least 0.1 kg./cm.2, thereby maintaining said pressing plate at a uniform predetermined temperature.
Claim 2
Dependent Claim
136 words
An improved method of heating a pressing plate of a continuous flat press provided with at least one conduit formed therein for flowing a heating medium through said flat press, and provided with a steam trap having an input connected to said conduit, and of maintaining said pressing plate at a predetermined temperature below 100* C., comprising the steps of discharging air from said conduit, supplying steam into said conduit, discharging said steam and drain liquid produced in said conduit from said conduit through said steam trap while maintaining the inside pressure of said conduit at a predetermined pressure below atmospheric pressure, and decreasing the pressure at an output of said steam trap to a pressure lower than said conduit pressure by at least 0.1 kg./cm.2, thereby maintaining said pressing plate at a uniform predetermined temperature.
Claim 3
Dependent Claim
32 words
An improved heating method as set forth in claim 1, in which said steam trap output pressure is decreased to a pressure lower than said conduit pressure by at least 0.3 kg./cm.2.
References Cited (Backward Citations)
US1847573A
Cited
US3525098A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-07 | 1975-09-06 | 1976-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-07 | 1979-09-06 | 1980-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-07 | 1983-09-06 | 1984-03-07 | $7700.00 | Window Closed / Lapsed |