Plastic article or earthenware shaping or treating: apparatus – Preform reshaping or resizing means: or vulcanizing means... – By fluid pressure actuated flexible diaphragm
Patent
1976-12-20
1978-03-21
Spicer, Jr., Robert L.
Plastic article or earthenware shaping or treating: apparatus
Preform reshaping or resizing means: or vulcanizing means...
By fluid pressure actuated flexible diaphragm
425405R, 425 19, 72 63, B29C 1704
Patent
active
040801390
ABSTRACT:
A press for molding large sheets around a forming surface which includes an elastic press pad, a first frame member on the side of the press pad away from the working surface thereof, a pressure cell formed between the press pad and the first frame member, the pressure cell containing an elastic diaphragm in contact with the press pad, a second frame member formed in a generally L-shaped configuration to encompass and hold an annular bead of the elastic diaphragm, mounting bolts for adjusting the positioning of the second frame member with respect to the first frame member, and channels in the first frame member for supplying a pressure medium to a pressure zone between the first and second frame members and the elastic diaphragm. In addition, the annular bead of the diaphragm is provided with a slot that contains a sealing ring, and the first frame member may be separated from contact with the second frame member by spacers to allow for pressure medium communication between the slot and the pressure medium zone between the first and second frame members and the elastic diaphragm.
REFERENCES:
patent: 2771850 (1956-11-01), Wheelon
patent: 2923130 (1960-02-01), Wheelon
patent: 3006306 (1961-10-01), Pfeiffer et al.
patent: 3545241 (1970-12-01), Grankowski et al.
patent: 3614811 (1971-10-01), Johnson
patent: 3888618 (1975-06-01), Jones
Asea AB
Spicer, Jr. Robert L.
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