Device for printing-pressure control

Details Device for printing-pressure control Device for printing-pressure control

1980-06-05

1982-09-28

Pieprz, William

Printing

Rolling contact machines

Rotary

101153, 100 47, 7386244, B41F 1334

Patent

active

043512372

ABSTRACT:
A pressure control arrangement for controlling pressure between a printing roller and an offset roller by measuring a force exerted in a bearing of the printing roller when the latter rotates with an angle .psi.. The arrangement includes a piezoelectric pickup positioned on the internal surface of the bearing of the printing roller, a measured pressure value processor for receiving a signal from the piezoelectric pickup, an indicator generating a signal corresponding to a desired pressure value and means to compare the first abovementioned signal with the second mentioned signal. The arrangement also includes a positioner circuit which receives the compared signal and applies the same to a drive member which adjusts the position of the bearing of the offset roller thereby adjusting printing pressure between two contacting rollers for printing on sheets of paper.

REFERENCES:
patent: 3331313 (1967-07-01), Notbohm et al.
patent: 3600747 (1971-08-01), McCarty
patent: 3732813 (1973-05-01), Vir Singh et al.
patent: 3900812 (1975-08-01), Brewer
patent: 3965735 (1976-06-01), Hartung
patent: 4033260 (1977-07-01), Lein et al.
patent: 4112751 (1978-09-01), Grunbaum
patent: 4117719 (1978-10-01), Schutz
patent: 4203319 (1980-05-01), Lechler

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