Cleaning device for offset printing machine

Details Cleaning device for offset printing machine Cleaning device for offset printing machine

1992-12-02

1994-05-10

Burr, Edgar S.

Printing

Antismut device

Cleaners

101425, B41F 3500

Patent

active

053098366

ABSTRACT:
A cleaning device is disclosed for an offset printing machine for quickly removing stains on a printed matter. A number of scrapers (7) are arranged in an axial direction of the surface of a printing drum (1) of the offset printing machine. The scrapers (7) are held by rods of air cylinders (8) which cause the scrapers to contact or be separated away from the surface of the drum (1). Solenoid valves are arranged corresponding to respective cylinders. The solenoid valves are controlled by a control unit (16). The position of hickey on the surface of the drum is designated from an information of a hickey position on the printed matter generated corresponding to the stain on the surface of the drum. When the associated solenoid valves are actuated, then the scrapers are brought into contact with the hickey position on the drum surface to scrape the hickey.

REFERENCES:
patent: 4173185 (1979-11-01), Voegelin
patent: 4463675 (1984-08-01), Ottenhues
patent: 4639776 (1987-01-01), Foerster et al.
patent: 4703691 (1987-11-01), Takeuchi et al.
patent: 4893562 (1990-01-01), Robertson
patent: 4922820 (1990-05-01), Grossman et al.

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