Multiple feed cylinder press

Printing – Stenciling – Rotary machines

Patent

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Details

101232, B41L 1300

Patent

active

054048060

ABSTRACT:
A printing press feeder capable of sheet feeding from the rear, sheet feeding from the front, or stream feeding from the rear, using tracks above a stock support for the feeder, the sheet feeder head being movably mounted on these tracks, and a movable drive connection from a power source to the sheet feeder head for driving of the sheet pickup advancers in the different head positions. The sheet feeder has first and second alternate drive mechanisms, on opposite ends of the transverse drive shaft, the first drive mechanism having a variable speed drive for sheet feeding individual sheets and slowing feed of each sheet as the sheet approaches the print cylinder, and the second drive mechanism having a constant speed drive for stream feeding overlapping sheets to the print cylinder. The press has nonprint lift cylinders engaging the squeegee mount and actuable to lift the squeegee out of print position, but still within the stencil screen frame, to allow the stencil screen frame to cycle without printing. The stencil screen carriage is connected to a drive shaft to be reciprocated, a pinion gear on the drive shaft engaging an elongated gear rack held by a pivotal bearing support, so that rotation of a drive crank will reciprocate the gear rack while rocking it about the pivotal bearing support, to rotatably drive the drive shaft in opposite directions causing rotational reciprocation of the cylinder and linear reciprocation of the carriage.

REFERENCES:
patent: 2578779 (1951-12-01), Black
patent: 2606492 (1952-08-01), Black
patent: 2866405 (1958-12-01), Black
patent: 3029927 (1962-04-01), Farwell
patent: 3120180 (1964-02-01), Black et al.
patent: 3889595 (1975-06-01), Jaffa
patent: 3889629 (1975-06-01), Black
patent: 4509422 (1985-04-01), Nagatani
patent: 4589335 (1986-05-01), Svantesson
patent: 5235907 (1993-08-01), Hirata

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