Rotary offset printing machine system with registration control

Details Rotary offset printing machine system with registration control Rotary offset printing machine system with registration control

1987-12-23

1989-05-09

Fisher, J. Reed

Printing

Multicolor

Rotary machines

101221, 101248, B41F 518

Patent

active

048278424

ABSTRACT:
To permit exchange of printed subject matter carried on a plate of a plate cylinder (10, 16) of two printing couples (8, 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.

REFERENCES:
patent: 3717092 (1973-02-01), Crum
patent: 3793899 (1974-02-01), Bourbonnaud
patent: 4346656 (1982-08-01), Schwaab
patent: 4696229 (1987-09-01), Bezler

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