Suction transfer actuation system for a multi-color sheet-fed ro

Details Suction transfer actuation system for a multi-color sheet-fed ro Suction transfer actuation system for a multi-color sheet-fed ro

1991-04-19

1993-02-09

Crowder, Clifford D.

Printing

Work supporting members

Grippers

271276, B41F 2106, B65H 512

Patent

active

051845539

ABSTRACT:
A suction transfer actuation system for a transfer drum of a multi-color sheet-fed rotary printing press for turning successive sheets, by rear-edge turning, during the sheet transfer from one printing unit to another to facilitate printing on the back side of the sheets. A plurality of suction arms are rigidly connected to a hollow suction rocker shaft connected to actuating levers carrying guide rollers engaging curved guide cam surfaces on a guide bar mounted on the transfer drum. The suction actuation system is driven by way of a cam rigidly mounted on the press frame engaged by a cam follower roller to oscillate a drive lever coupled by a link to a drive arm on the rocker shaft to rock the suction arms toward and away from the one printing unit under the guiding influence of the guide cam and guide rollers.

REFERENCES:
patent: 3537391 (1970-11-01), Mowry et al.
patent: 4583728 (1986-04-01), Mathes
patent: 4790244 (1988-12-01), Otfried et al.

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