Device for reversing the operation of grippers of a sheet-turnin

Details Device for reversing the operation of grippers of a sheet-turnin Device for reversing the operation of grippers of a sheet-turnin

1976-10-18

1978-07-04

Pieprz, William

Printing

Work supporting members

Grippers

101232, 271 82, B41F 2104

Patent

active

040981878

ABSTRACT:
In a printing machine operable for printing selectively on one or on both sides of a sheet, the printing machine having a sheet-turning drum provided with grippers actuatable by control cams and follower rollers cooperating therewith, the control cams and follower rollers being shiftable relative to one another, a device for reversing the operation of the grippers includes control elements carrying the follower rollers, and a tool insertable into the sheet-turning drum so as to project well beyond the periphery thereof, the tool cooperating with the control elements so as to lift the follower rollers from the control cams during shifting of the control cams and the follower rollers relative to one another.

REFERENCES:
patent: 3151552 (1964-10-01), Peyrebune
patent: 3372708 (1968-03-01), Hotchkin
patent: 3614927 (1971-10-01), Jurny
patent: 3682550 (1972-08-01), Samuels et al.
patent: 3828673 (1974-08-01), Gazzola et al.
patent: 3941055 (1976-03-01), Semmler
patent: 3973496 (1976-08-01), Cerny et al.
patent: 4014261 (1977-03-01), Becker

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