Printing apparatus

Details Printing apparatus Printing apparatus

1998-09-17

2000-02-15

Yan, Ren

Printing

Inkers

Roller

101148, B41F 3100

Patent

active

060240172

ABSTRACT:
A printing apparatus having ink feeders for selectively feeding inks to a plurality of image areas on a plate or plates mounted on a plate cylinder. A plate cylinder supports, peripherally thereof, a single plate having a first and a second image areas. A plurality of cams are rotatable synchronously with the plate cylinder, and are arranged in positions laterally of the plate cylinder corresponding to the image areas. A plurality of ink rollers are arranged circumferentially of the plate cylinder for contacting a surface of the plate to feed ink to the image areas. A plurality of ink roller support arms rotatably support the ink rollers. An ink roller support arm swing mechanism includes cam followers for contacting the cams to swing the ink roller support arms successively, with rotation of the cams, between an ink feeding position in which the ink rollers contact the surface of the plate and a retracted position in which the ink rollers are separated from the surface of the plate. A water applying roller contacts the surface of the plate to feed dampening water to the image areas and is supported by water applying roller support arms on a water applying roller support arm swing mechanism having cam followers for contacting the cams to swing the water applying roller support arms, with rotation of the cams, between an dampening water feeding position in which the water applying roller contacts the surface of the plate and a retracted position in which the water applying roller is separated from the surface of the plate.

REFERENCES:
patent: 2911907 (1959-11-01), Davidson
patent: 4458591 (1984-07-01), Guaraldi
patent: 5101723 (1992-04-01), Holl et al.
patent: 5469787 (1995-11-01), Turner et al.
patent: 5623873 (1997-04-01), Ikeda

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