Retractable cleaning system for lithographic printing plates

Details Retractable cleaning system for lithographic printing plates Retractable cleaning system for lithographic printing plates

1998-01-22

1999-02-16

Yan, Ren

Printing

Antismut device

Cleaners

101425, B41F 3500

Patent

active

058709541

ABSTRACT:
A cleaning apparatus designed for use in conjunction with a lithographic printing member associated with a rotary cylinder comprises an elastomeric (preferably foam) roller for making rotating contact with the printing member; a fixed screen; and a brush in rotating contact with the roller and with the screen. The roller may extend axially at least across the imaging region of the printing member (i.e., that portion of the imaging member that actually receives the image to be printed). The elastomeric roller removes imaging debris from the cylinder, while the brush removes from the roller debris that would otherwise accumulate therein. As the brush rotates past the screen, it sheds debris withdrawn from the roller; debris passing through the screen may be collected, for example, in a container or removed from the system by vacuum. The system may also include one or more doctor blades in contact with the roller for removing debris remaining on the roller following its contact with the brush.

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