Printing – Intaglio – Bed-and-cylinder machines
Patent
1993-07-01
1994-11-29
Yan, Ren
Printing
Intaglio
Bed-and-cylinder machines
101163, 101DIG36, 33619, B41F 336
Patent
active
053679539
ABSTRACT:
Disclosed is a roller offset printing apparatus which comprises image sensors 14 and 15 disposed on a linear stage 4, and position correction motors 8 to 13 disposed in the respective peripheries of a master plate 6 and a work plate 7, wherein positions of the master plate 6 and the work plate 7 on the linear stage 4 are detected by the image sensors 14 and 15 so that the respective positions of the master plate 6 and the work plate 7 are corrected by the motors 8 to 13 in accordance with the quantities of displacement when there is any displacement between the detected positions and reference positions. After correction, the linear stage 4 and a roller transfer drum 1 are moved while being synchronized with each other to thereby perform transfer. As a result, accuracy in positioning of the master plate and the work plate on the linear stage is improved, so that good superposition printing is provided.
REFERENCES:
patent: 1430059 (1922-09-01), Deeks
patent: 3067676 (1962-12-01), Dickerson
patent: 3101050 (1963-08-01), Schaefer et al.
patent: 3336865 (1967-08-01), Brand
patent: 4602563 (1986-07-01), Soini
patent: 5158018 (1992-10-01), Masaki et al.
patent: 5272980 (1992-12-01), Takeuchi et al.
Oyanagi Hideaki
Yamashita Kenkichi
NSK Ltd.
Yan Ren
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