Process for producing acoustic carbon diaphragm

Details Process for producing acoustic carbon diaphragm Process for producing acoustic carbon diaphragm

1988-09-01

1990-09-25

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Gas or vapor deposition of article forming material onto...

264 85, 264317, 423449, 427249, B29C 4102, C01B 3102

Patent

active

049591851

ABSTRACT:
A process for producing an acoustic diaphragm of carbonaceous material including the steps of uniformly depositing vapor phase thermally decomposed carbon generated by the thermal decomposition of a carbon-generating material introduced together with a carrier gas on the surface of a diaphragm-shaped base material and separating the obtained thermally decomposed carbon deposit from the diaphragm-shaped base material. Thus, the diaphragm is inexpensively made of a carbon material having a large E/.rho. value, high elasticity and high accuracy, without cracking.

REFERENCES:
patent: 3271488 (1966-09-01), Dahlberg
patent: 3457042 (1969-07-01), Ettinger
patent: 3949106 (1976-04-01), Araki et al.
patent: 4034031 (1977-07-01), Lersmacher et al.
patent: 4035460 (1977-07-01), Dietze et al.
patent: 4332751 (1982-06-01), Brassell et al.
patent: 4349498 (1982-09-01), Ellis et al.
English-Language Translation of Japanese (Kokai) Reference 53-106,025.

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