Changeover protection system for perfecting printing machines

Details Changeover protection system for perfecting printing machines Changeover protection system for perfecting printing machines

1984-04-27

1985-07-23

Fisher, J. Reed

Printing

Rolling contact machines

Rotary

101410, B41F 502, B41F 2104

Patent

active

045302839

ABSTRACT:
The turning cylinder and storage cylinder in a perfecting printing press is provided with changeover mechanisms having spring-loaded electromagnetically releasable latches and sensors for detecting latched adjustments. Moreover, a contactless sensor is provided for detecting clamping of the calendering suckers in the storage cylinder even when the cylinder is rotating. Contactless proximity switches determine the correct phase adjustments between the storage cylinder and the turning cylinder for both perfecting and first form printing. An access door and interlock guarantees that the cylinders are turned to a normal position and braked before the access door is opened, and the access door cannot be closed for subsequent printing until changeover has been completed. An indicator array indicates the sequence of adjustments to follow and abnormal conditions.

REFERENCES:
patent: 4014261 (1977-03-01), Becker
patent: 4122773 (1978-10-01), Wirz
patent: 4147105 (1979-04-01), Becker

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