Printing – Multicolor – Rotary machines
Patent
1976-06-14
1977-07-05
Fisher, J. Reed
Printing
Multicolor
Rotary machines
101DIG12, 331845, B41F 1312
Patent
active
040332594
ABSTRACT:
Apparatus for facilitating peripheral adjustment of a printing plate on a printing cylinder of a multicolor printing press in the form of an optical viewing device having magnifying optics including a single eye piece and two objectives. The objectives are spaced for simultaneous viewing of a peripheral reference mark at the end of the cylinder and an index mark on the plate which is positionally related to the image thereon. The optical viewing device has a screen including an optical reference, with the reference and index marks being superimposable thereon in the same field of view. In one form of the invention a calibrated scale is provided on the screen for direct measurement of the disparity in peripheral register between the two marks. In another form of the invention the bracket which supports the viewing device has an associated calibrated micrometer screw for bodily movement of the viewing device between the two marks and with the change in micrometer reading providing a measure of the amount that the plate must be moved to achieve peripheral register.
REFERENCES:
patent: 3398633 (1968-08-01), Raivio
patent: 3679316 (1972-07-01), Boujon
patent: 3969826 (1976-07-01), Ottenhues et al.
Fisher J. Reed
Roland Offsetmaschinenfabrik Faber & Schleicher AG
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