Rapid load-relieve device for continuous press

Details Rapid load-relieve device for continuous press Rapid load-relieve device for continuous press

1975-10-10

1977-06-14

Spicer, Jr., Robert L.

Plastic article or earthenware shaping or treating: apparatus

Control means responsive to or actuated by means sensing or...

Molding pressure control means responsive to pressure at...

100 53, 100154, 100 50, 425154, 425371, 425406, B29C 306

Patent

active

040294560

ABSTRACT:
A rapid load relief device to prevent fast build-up of pressure in a continuous press of the type having two rotatively driven endless conveyor belts forming opposed, substantially linear spans defining a press zone with press platens applying pressure through the travelling spans to work carried therebetween and in which a plurality of hydraulic cylinders or spindles are inserted between the press platens and rigid supports with pressure supplied to the cylinders through a pressure-controlling valve which is sensitive to the movement of the pressure platen to regulate the pressure in the cylinders maintaining a constant platen spacing in which means are provided which, upon sensing an excess pressure, immediately separate the press platens.

REFERENCES:
patent: 2389169 (1945-11-01), Stacy
patent: 3680476 (1972-08-01), Pfeiffer
patent: 3719445 (1973-03-01), Sindelar
patent: 3748225 (1973-07-01), Busker et al.
patent: 3808092 (1974-04-01), Busker
patent: 3851685 (1974-12-01), Ahrweiler et al.
patent: 3890413 (1975-06-01), Peterson

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