Rotary offset printing machine system

Details Rotary offset printing machine system Rotary offset printing machine system

B - Operations, Transporting

41

F

101/59

B41F 5/18 (2006.01) B41F 7/10 (2006.01) B41F 13/46 (2006.01)

Patent

CA 1316040

ABSTRACT OF THE DISCLOSURE. To permit exchange of printed subject matter carried on a plate of a plate cylinder (10, 16) of two printing couples (6, 10; 12, 16) which are selectively engageable with an impression cylinder (4) which, for example, can be a blanket cylinder of another printing couple (3, 4), while continuing to print information from one of the plates (10, 16) of a selected one of the first two printing couples, clutches (9, 15) are provided to engage the respective printing couples through drive gears mounted on the shafts of the respective blanket cylinders (6, 12), circumferential register of the associated plate cylinders (10, 16) is obtained by axial shifting of the blanket cylinders (6, 12) and use of spiral gears in which the gears connecting the blanket cylinder and plate cylinder (6, 10; 12, 16) of one printing couple have opposite direction of gear inclination to the drive gear (7, 13) selectively engageable with the main machine drive, for example through a gear (5) on the impression cylinder (4) which, in turn, is coupled to the main drive gear (1). Thus, the gearing which is present to drive the printing couples can, likewise, be used to control respective circumferential register thereof.

555190

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