Gripper opening/closing mechanism of sheet transfer cylinder in

Details Gripper opening/closing mechanism of sheet transfer cylinder in Gripper opening/closing mechanism of sheet transfer cylinder in

1997-08-22

1998-09-29

Eickholt, Eugene H.

Printing

Rolling contact machines

Rotary

101409, 271277, B41F 706

Patent

active

058133380

ABSTRACT:
In order to improve a gripper opening/closing mechanism of a sheet transfer cylinder in a sheet-fed printing machine in the prior art, the gripper opening/closing mechanism of the sheet transfer cylinder in the sheet-fed printing machine comprises: a plurality of grippers; a gripper shaft whereupon the plurality of grippers are disposed over specific intervals; and a cam mechanism provided at each of two ends of the gripper shaft, which cause the gripper shaft to move when the sheet transfer cylinder has rotated to a first specific position so that the grippers and the external circumferential side surface of the sheet transfer cylinder come in contact with each other and causes the gripper shaft to move in the opposite direction when the sheet transfer cylinder has rotated to a second specific position so that the grippers and the external circumferential side surface of the sheet transfer cylinder depart from each other. With the sheet transfer cylinder of the sheet-fed printing machine thus structured to constitute the pick-up cylinder, the impression cylinders, the intermediate cylinders and the delivery cylinders, torsion in the gripper shaft during opening/closing of the grippers is prevented and the opening/closing of the grippers can be performed in a consistent manner.

REFERENCES:
patent: 1815895 (1931-07-01), Bennison
patent: 2175665 (1939-10-01), Kluitmann
patent: 3151552 (1964-10-01), Peyrebrune
patent: 4390176 (1983-06-01), Kato
patent: 4759290 (1988-07-01), Holl et al.
patent: 4900008 (1990-02-01), Fichter et al.
patent: 4905985 (1990-03-01), Nagatani
patent: 4928586 (1990-05-01), Kida
patent: 5186107 (1993-02-01), Wieland
patent: 5555804 (1996-09-01), Kojima
patent: 5678486 (1997-10-01), Bachmeir et al.

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