Printing arrangement alternatively operated for one-side printin

Details Printing arrangement alternatively operated for one-side printin Printing arrangement alternatively operated for one-side printin

1973-11-09

1976-03-30

Fisher, J. Reed

Printing

Rolling contact machines

Rotary

101183, 271186, B41F 502, B41F 516

Patent

active

039466698

ABSTRACT:
In first and second modes, the arrangement prints on only one side or on both sides of a sheet, respectively. A sheet is transported along a predetermined path through the arrangement and passes printing devices cooperating to effect printing of the sheet. Changeovers from one to the other mode alter a portion of the sheet transport path, changing its length. A control system for the arrangement includes a shift register. When a sheet arrives at a predetermined location along the path, a sheet-representing signal is applied to the shift register. Shifting pulses applied to the shift register in synchronism with sheet travel cause the sheet-representing signal to travel through the shift register in simulation of sheet travel. As the sheet-representing signal reaches preselected shift-register stages, it causes an actuator associated with such stage to actuate a respective printing device. Thus, the printing devices are controlled in dependence upon the arrival of the sheet at predetermined portions of the path. Upon a change of operating mode, a compensating unit is operable for at least partially offsetting changes in the correlation between shift register stages of the shift register and the associated portions of the path.

REFERENCES:
patent: 3264916 (1966-08-01), Owen
patent: 3343672 (1967-09-01), Vries et al.
patent: 3654861 (1972-04-01), Rudolph et al.

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