Arrangement for reversing pressure of cylinders and rollers in p

Details Arrangement for reversing pressure of cylinders and rollers in p Arrangement for reversing pressure of cylinders and rollers in p

1986-10-30

1989-06-13

Fisher, J. Reed

Printing

Rolling contact machines

Rotary

B41F 1340

Patent

active

048381616

ABSTRACT:
A main hydraulic circuit for controlling printing pressure of a printing machine is supplemented by an auxiliary high pressure generating circuit which becomes effective only after the pressure flow reversal in the main hydraulic circuit. The auxiliary circuit includes a pressure transformer or a hand-operated auxiliary pump connected via a back pressure valve to a hydraulic motor in the main circuit, and a second back pressure valve connected in series with a driving pump in the main circuit.

REFERENCES:
patent: 2950674 (1960-08-01), Taylor et al.
patent: 3027832 (1962-04-01), Halley
patent: 3731620 (1973-05-01), Klemmer
patent: 4119031 (1978-10-01), Ottenhues

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