Hydraulic press

Details Hydraulic press Hydraulic press

1976-12-20

1978-08-08

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

72 63, 425DIG19, B29C 1706

Patent

active

041053885

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, the first frame member having a top wall and side walls forming a pressure cell area therebetween, an elastic diaphragm in the pressure cell area 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, a trough-shaped supporting member positioned adjacent the end walls of the first frame member and the press pad such that a gap is formed between the end walls and the supporting member, a movable seal strip positioned in the gap to prevent the press pad from being pressed out of the pressure cell area when the elastic diaphragm is expanded, and a supporting strip attached to the end walls of the first frame member at a point within the pressure cell area to secure the press pad within the pressure cell area.

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

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