Auxiliary printing unit for a printing press, in particular a ro

Details Auxiliary printing unit for a printing press, in particular a ro Auxiliary printing unit for a printing press, in particular a ro

1980-01-28

1981-04-21

Fisher, J. Reed

Printing

Selective or progressive

Numbering

101144, 101216, 101248, B41F 1314, B41F 1320, B41F 1328

Patent

active

042625904

ABSTRACT:
An auxiliary printing unit assembly including an auxiliary press unit dimensioned to fit between the frame members of a press main frame. Stops on the main frame define a working position adjacent the press impression cylinder. A coupling assembly is journaled in the press main frame for interconnecting the press drive and the shaft of the press unit. The coupling assembly has an internally splined hollow drive shaft and an externally splined mandrel slidable in the drive shaft between inwardly extended and retracted positions. The mandrel has an expandible hub at its inner end dimensioned to mate with a recess in the press unit shaft when the mandrel is inwardly extended. The mandrel and press unit shaft have respective off-center registering elements which are also axially engaged when the mandrel is inwardly extended. Register indicia on the mandrel and the press unit shaft are so positioned that upon alignment thereof the registering elements are aligned with one another in readiness for axial engagement. A manually rotated transversely arranged operating shaft in the mandrel carries cams for sequentially (a) shifting the mandrel from its retracted position to its extended position and for (b) expanding the hub to insure a tight centered driving connection with the press unit shaft.

REFERENCES:
patent: 2216562 (1940-10-01), Barber
patent: 3728960 (1973-04-01), Heath
patent: 3783780 (1974-01-01), Saueressig
patent: 4024812 (1977-05-01), Jahn

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