Image position adjusting device for printing machine

Details Image position adjusting device for printing machine Image position adjusting device for printing machine

1980-12-03

1982-09-21

Fisher, J. Reed

Printing

Rolling contact machines

Rotary

101229, 101248, B41F 502, B41F 522, B41F 1312

Patent

active

043500935

ABSTRACT:
An image detecting and positioning device for an off-set printing machine capable of printing on both sides of a printing sheet. Electromagnetic clutches couple and disengage gears from the shafts of rubber cylinders in response to input signals with the two gears engaged with each other. Electromagnetic brakes are also coupled to the shafts of the rubber cylinders. Rotational angle detectors provide outputs related to the rotational positions of the shafts of one of the rubber cylinders and its plate cylinder. The electromagnetic brakes and clutches are operated in response to outputs from the rotational angle detectors to correctly position images on the rubber cylinders.

REFERENCES:
patent: 2003799 (1935-06-01), Barber
patent: 3732815 (1973-05-01), Greiner et al.
patent: 3742849 (1973-07-01), Greiner et al.

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