System for removing foreign matter from a plate cylinder of a pr

Details System for removing foreign matter from a plate cylinder of a pr System for removing foreign matter from a plate cylinder of a pr

1991-08-13

1992-08-18

Burr, Edgar S.

Printing

Cleaning attachments

101423, B41F 3500

Patent

active

051389452

ABSTRACT:
To rapidly and reliably remove foreign objects from rotating plate cylinders (10, 10'; 10a, 10a') of a printing machine, a carriage (12) is mounted on a keyboard (21) having keys associated with predetermined axial positions or zones on the plate cylinder, controls via a control unit (CU) rotation of the stepping motor to the respective axial zone which is selected by operation of one of the keys (20) of the keyboard. A solenoid then projects the wiper blade to remove a foreign object or hickey from the plate. In a multi-cylinder machine, the removal apparatus including the spindle, carriage, wiper blade and solenoid, is placed in association with each one of the cylinders, one keyboard and one control unit operating all the wiper blades in unison, thereby eliminating the need to determine on which one of the plate cylinders of, for example, a multi-color press, a foreign object has lodged. After removal of a foreign object, or a number of foreign objects, as counted by keyboard operation, the carriage is returned to a rest or cleaning position where a motor-operated brush, upon sensing the presence of the carriage, removes the objects from the blade.

REFERENCES:
patent: 1306646 (1919-06-01), Trier
patent: 3252416 (1966-05-01), Allen
patent: 4082038 (1978-04-01), Ueno et al.
patent: 4499827 (1985-02-01), Takeuchi et al.
patent: 4922820 (1990-05-01), Grossman
patent: 5020433 (1991-06-01), Jeschke et al.

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