Apparatus for avoiding an excess of pressure in a continuous pre

Details Apparatus for avoiding an excess of pressure in a continuous pre Apparatus for avoiding an excess of pressure in a continuous pre

1975-10-10

1977-04-12

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, 425154, 425150, 425371, 425406, B29C 306

Patent

active

040172350

ABSTRACT:
A safety device for avoiding excess 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 the pressure-controlling valve is coupled to the press platen through a piston and cylinder arrangement having a pressure therein maintained so as to not exceed a pre-determined value whereby pressure in the hydraulic cylinders exceeding that pressure will cause the piston to yield and relieve the pressure.

REFERENCES:
patent: 2267508 (1941-12-01), Spengler
patent: 2389169 (1945-11-01), Stacy
patent: 2805447 (1957-09-01), Voges
patent: 3248985 (1966-05-01), Hitchcock et al.
patent: 3719445 (1973-03-01), Sindelar
patent: 3851685 (1974-12-01), Ahrweiler et al.
patent: 3881852 (1975-05-01), Ahrweiler
patent: 3890413 (1975-06-01), Peterson

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