Printing unit for a web-fed printing machine

Details Printing unit for a web-fed printing machine Printing unit for a web-fed printing machine

B - Operations, Transporting

41

F

B41F 13/10 (2006.01) B41F 13/04 (2006.01) B41F 13/50 (2006.01) B41F 17/00 (2006.01)

Patent

CA 2117665

The printing unit has two cooperating cylinders (1, 4) which form the printing nip and which have printing saddles (2, 5) separated by cylinder pits (3, 6). The paper web (7) passing through the printing nip is transported in the pilgrim-step mode, in order to print formats adjoining one another. The two cylinders (1, 4) are angularly adjustable relative to one another, in respect of the position of their printing saddles (2, 5) cooperating in the printing nip, in a manner offset by the amount of a circumferential distance which is approximately equal to the difference between the circumferential length (S) of a printing saddle and the circumferential length (B) of a printing image. The printing zone is therefore only approximately as large as the printing image, and the print-free zone available for retracting the paper web is correspondingly enlarged.

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