Printing – Rolling contact machines – Rotary
Patent
1982-09-14
1984-03-20
Eickholt, E. H.
Printing
Rolling contact machines
Rotary
B41F 1324
Patent
active
044374038
ABSTRACT:
An automatic control method and apparatus for adjusting the register of printing plates in a multi-color printing press before test sheets or proofs are printed. Register marks are copied on the printing plates when the plates are manufactured. Photoelectric scanners sense the register marks and determine the relative positions of the printing plates without the use of paper. The positions of the printing plates are compared and the plate cylinders are adjusted so that the printing plates of all the plate cylinders are in register with one another. Preferably the relative positions are referenced to registered zero positions in the middle of the adjustment range for each plate cylinder, and the position of the printing plate having the least deviation from the corresponding zero position is chosen as a reference position to which the positions of the other printing plates are compared.
REFERENCES:
patent: 1151461 (1915-08-01), Hatt
patent: 3073997 (1963-01-01), Tagliasacchi
patent: 3468201 (1969-09-01), Adamson et al.
patent: 3561654 (1971-02-01), Greiner
patent: 3915090 (1975-10-01), Horst et al.
patent: 4135664 (1979-01-01), Resh
Eickholt E. H.
M.A.N. - Roland Druckmaschinen Aktiengesellschaft
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