Rotary offset printing machine having a multi-image receiving bl

Printing – Multicolor – Rotary machines

Patent

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Details

101221, B41F 516

Patent

active

044910703

ABSTRACT:
To provide for multi-color printing while passing a substrate, such as cut sheets or a web (39, 67), only through a single printing line, so that paper, possibly of poor quality, will not be excessively saturated by damping liquid, and mechanically stressed by passage through a plurality of printing lines, the blanket cylinders (1-4; 30, 31; 50-53) of respective printing systems which each have plate cylinders, inkers and dampers, are positioned in ink and damping liquid transferring relation, so that a partial image to be printed, applied to a blanket cylinder (3, 31, 52) by a respective associated plate cylinder (7, 33, 56) is transferred to an adjacent contacting blanket cylinder (4, 30, 53) which, additionally, receives a second partial image to be printed from an associated respective plate cylinder (8, 32, 57). An impression or printing cylinder (17, 38, 66, 68) is provided, for contacting engagement of the printing substrate against the adjacent contacting blanket cylinder (4, 30, 53). Thus, the last blanket cylinder will carry a plurality of images, for example in different colors, and the substrate is contacted only at a single impression line with the last blanket cylinder. For versatility, the respective cylinders should be movably journalled, so that they can be rocked in and out of engagement with each other, to permit, respectively, printing in different modes by the same machine.

REFERENCES:
patent: 3263606 (1966-08-01), Poynter
patent: 3384011 (1968-05-01), Schunemann
patent: 3680481 (1972-08-01), Sternberg
patent: 3902415 (1975-09-01), Fischer
patent: 4056056 (1977-11-01), Giori
patent: 4154165 (1979-05-01), Jeschke
patent: 4394835 (1983-07-01), Gertsch et al.

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