Washer unit control system

Printing – Processes – Condition responsive

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Details

101425, B41F 3300

Patent

active

055842453

ABSTRACT:
In a method and a device for controlling the blanket cylinder washing processes of a rotary offset printing machine with several printing units (d1) each assigned a washer unit (12-27) and several reel changers (33) each connected to a reel changer control unit (34), spoilage is reduced by simple, operator-friendly, cost-effective and universal means when washer units (12-27) are connected to the outputs of a washer unit control (40), a trigger signal (A) is applied at one output of the washer unit control (40) and at the output of a logical AND-function of the reel changer signal (R) and of a counting signal (Z) of a counting device (38) for the printed copies, and a memory is provided for the current data set with distances from the lead reel changer (33) to the first-triggered washer units (22, 23, 24, 25) assigned to the web coming from the lead reel changer, and the respective distances from all washer units (12-27) to the folder, the web speed and the web widths, so that the wash spoilage of all webs occurring during washing and any reel change spoilage arrive simultaneously at the folder.

REFERENCES:
patent: 4686902 (1987-08-01), Allain et al.
patent: 4798228 (1989-01-01), Gollinger et al.
patent: 4930415 (1990-06-01), Hara et al.
patent: 5005478 (1991-04-01), Goldberg et al.

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