Apparatus for varying the position of a printing operation perfo

Details Apparatus for varying the position of a printing operation perfo Apparatus for varying the position of a printing operation perfo

1982-03-16

1984-09-25

Eickholt, E. H.

Printing

Rolling contact machines

Rotary

101181, 226 40, B41F 1324

Patent

active

044730098

ABSTRACT:
The apparatus comprises a printing cylinder for printing an element such as a paper web and feed and take-up rollers for the web. Sensors are provided for sensing the relative positioning of the web and the print which is applied to the web and the signals from the sensors are fed to a micro-processor. The micro-processor controls the feed and take up rollers so that if the relative positioning of the web is incorrect, the feed and take-up rollers are controlled simultaneously to move the web relative to the printing cylinder substantially without varying any tension in the web between the feed roller and the take-up roller.

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patent: 3329087 (1967-07-01), Sandor et al.
patent: 3561654 (1971-02-01), Greiner
patent: 3841216 (1974-10-01), Huffman

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