| 摘要 |
A printing press performs offset color printing. A blanket cylinder having four image segments selectively contacts a plate cylinder having four image segments and an impression cylinder having five image segments for carrying print media. A pair of eccentric bushings for independently controlling the impression cylinder engages same to blanket cylinder. A print media feed system and a delivery system are located on the same side of the press and cooperate with each other via a means for moving feed and delivery trays in a generally vertical direction. Print media are gripped only once and travel in the same direction until let go by the impression cylinder. An image forming system forms four images on a plate cylinder to be inked by four respective inking units oriented therearound. All four plate image sections can be inked during one rotation of the plate cylinder. Four inking units including a minimal number of rollers for inking the plate image sections. Such an orientation of cylindrical image segments only discards the first three print media and can deliver a finished printed media by the fifth rotation of the impression cylinder.
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