Gripper bar conveyor for multiple color offset rotary printing p

Details Gripper bar conveyor for multiple color offset rotary printing p Gripper bar conveyor for multiple color offset rotary printing p

1992-06-23

1993-03-16

Eickholt, Eugene H.

Printing

Planographic

Multicolor

101157, 101408, B41F 3106

Patent

active

051934582

ABSTRACT:
A gripper bar conveyor mechanism for transferring sheets to be printed from one rotating impression cylinder to another in a multiple color rotary offset printer of the type having sets of impression cylinders and corresponding blanket cylinders for rolling contact with the sheets to be printed therebetween. The gripper bar conveyor mechanism includes a transferrable gripper bar activatable for releasably securing sheets to be printed in a fixed orientation with respect to the transferrable gripper bar. The registration projection is affixed to the transferrable gripper bar. A registration pocket is adjustably affixed to each of the impression cylinders for temporarily receiving the registration projection of the gripper bar and thereby holding the gripper bar in a desired position with respect to the impression cylinder. A conveyor band is attached to the gripper bar and is operably connected to the rotary offset press for moving the gripper bar from one impression cylinder to the next. The registration projection is engaged in the registration pocket at each of the impression cylinders during a portion of the impression cylinder rotation which is sufficient to initialize rolling contact of the sheet to be printed in proper registration between the impression cylinder and the corresponding blanket cylinder at each set of impression and blanket cylinders.

REFERENCES:
patent: 1514049 (1924-11-01), Ichida
patent: 2231914 (1941-02-01), Huck
patent: 3283710 (1966-11-01), Zahradwik et al.
patent: 3664261 (1972-05-01), Dahlgren
patent: 3814014 (1974-06-01), Dahlgren
patent: 5085143 (1992-02-01), Becker
patent: 5125334 (1992-06-01), Marx et al.

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