Front lay device for sheet-fed rotary printing presses

Details Front lay device for sheet-fed rotary printing presses Front lay device for sheet-fed rotary printing presses

1982-04-26

1983-09-06

Eickholt, E. H.

Printing

Work supporting members

Grippers

271245, B41F 2104

Patent

active

044022662

ABSTRACT:
A front lay device for a sheet-fed rotary printing press comprising a feed table, a stop shaft disposed downwardly of a front end of the feed table and reciprocably angularly movable about its own axis, a stop holder mounted on the stop shaft and having a stop located adjacent to the front end of the feed table, a swingable hold-down member pivotably mounted by a pivot shaft on the stop holder and having a hook-shaped distal end disposed adjacent to the front end of the feed table, a cam shaft rotatable in synchronization with the stop shaft for driving the swingable hold-down member, and a link shaft drivable by the drive shaft for reciprocable movement about its own axis. The pivot shaft and the link shaft are operatively connected by a quadruplet link mechanism for lifting the swingable hold-down member from an upper surface of the front end of the feed table when a sheet is delivered onto the latter, and for bringing the swingable hold-down member toward the feed table to hold the sheet down against the feed table, while the stop shaft makes a single reciprocable angular movement.

REFERENCES:
patent: 2831425 (1958-04-01), Schunemann
patent: 2976038 (1961-03-01), Whyte
patent: 2984482 (1961-05-01), Kist et al.
patent: 3116923 (1964-01-01), Gunther
patent: 3637202 (1972-01-01), Mowry et al.
patent: 3829085 (1974-08-01), Jeschke et al.

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