Roller offset printing apparatus

Details Roller offset printing apparatus Roller offset printing apparatus

1993-07-01

1994-08-09

Fisher, J. Reed

Printing

Intaglio

Bed-and-cylinder machines

101251, 101286, B41F 336, B41F 366

Patent

active

053355954

ABSTRACT:
A roller offset printing apparatus comprising: a linear stage movable forwards and backwards; a stage driving means for driving said linear stage; a master plate and a work plate disposed at a predetermined interval on said linear stage, said master plate having ink pits reserving ink; a roller transfer drum supported rotatably; a roller transfer drum driving means for driving said roller transfer drum so that said roller transfer drum rotates on the surface of said master plate to transfer the ink in said ink pits of said master plate onto the outer circumferential surface of said roller transfer drum and said roller transfer drum further rotates on a surface of said work plate to thereby transfer the ink from the outer circumferential surface of said roller transfer drum onto the surface of said work plate; a rotation force transmission control means for controlling on/off of transmission of rotation force from said roller transfer drum driving means to said roller transfer drum; a rotation angle detection means for detecting the rotation angle of said roller transfer drum; and a transfer control means for turning off said rotation force transmission control means at the time of start of transfer to thereby cut off transmission of the rotation force from said roller transfer drum driving means to said roller transfer drum and for turning on said rotation force transmission control means at the time of completion of transfer to thereby return said roller transfer drum to a transfer start position.

REFERENCES:
patent: 4841857 (1989-06-01), Hashimura et al.

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