Sheet transfer apparatus for rotary printing machines having ser

Details Sheet transfer apparatus for rotary printing machines having ser Sheet transfer apparatus for rotary printing machines having ser

1978-05-25

1980-12-30

Pieprz, William

Printing

Rolling contact machines

Rotary

101230, 101409, 271 82, 29117, B41F 2104, B41F 704

Patent

active

042416590

ABSTRACT:
To permit reversal of sheets having extended length, a sheet storage or sheet transfer drum in engagement with a sheet reversal drum is formed with a sheet displacement apparatus located on the sheet storage drum rearwardly--with respect to the direction of rotation thereof--of the gripper means of the sheet storage drum and operable to lift a sheet off the circumference of the storage drum; the sheet displacement means preferably is a rail extending axially across the width of the storage drum which can swing from a circumferential position on the storage drum to an extended position, under control of a fixed cam thus, effectively, shortening the length of the overlap of a sheet on the storage drum on the circumference thereof and permitting handling of longer sheets thereby. The extension of the sheet displacement means is carried out at a position when the displacement means are out of engagement or interference with any adjacent cylinder.

REFERENCES:
patent: 2586300 (1952-02-01), Campbell
patent: 2892630 (1959-06-01), Schunemann
patent: 2933039 (1960-04-01), Claybourn et al.
patent: 3654861 (1972-04-01), Rudolph et al.
patent: 3772990 (1973-11-01), Weisgerber
patent: 3796154 (1974-03-01), Weisgerber
patent: 4015522 (1977-04-01), Preuss et al.
patent: 4099463 (1978-11-01), Zimmerman

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