Gas-loaded pressure diaphragm

Details Gas-loaded pressure diaphragm Gas-loaded pressure diaphragm

1986-06-13

1987-08-04

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Preform reshaping or resizing means: or vulcanizing means...

By fluid pressure actuated flexible diaphragm

100269A, 425406, 425457, 425DIG110, B30B 502

Patent

active

046843396

ABSTRACT:
A gas-loaded diaphragm for exerting a predetermined pressure on a ceramic substrate during sintering to prevent x-y shrinkage. In the most preferred embodiment, the diaphragm comprises a gas-filled base composed of two opposing discs, and a substantially hollow gas-filled toroid container disposed around the perimeter of the opposing discs and communicating therewith to permit gas flow therebetween. This diaphragm is disposed in relation to a ceramic substrate-containing cell so that when it is heated to a desired temperature, the gas in the diaphragm expands and forces the two opposing discs apart to thereby exert a predetermined pressure on the ceramic substrate-containing cell.

REFERENCES:
patent: 2373770 (1945-04-01), Martin
patent: 3383737 (1968-05-01), Gregor
patent: 3523148 (1970-08-01), Boyer et al.
patent: 3879509 (1975-04-01), Elderbaum
patent: 4009238 (1977-02-01), Niedermeier et al.
patent: 4156589 (1979-05-01), Schmitt et al.
patent: 4190484 (1980-02-01), Pohl
patent: 4264556 (1981-04-01), Kumar et al.
IBM Technical Disclosure Bulletin, vol. 23, No. 5, Oct. 1980.

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