Gripper cylinder

Details Gripper cylinder Gripper cylinder

1996-12-10

1997-10-21

Yan, Ren

Printing

Work supporting members

Grippers

101246, B41F 2104

Patent

active

056784864

ABSTRACT:
A gripper cylinder configurable as a printing cylinder of a sheet-fed printing machine, a feeder drum in a sheet-fed printing machine, or a gripper cylinder in a folder unit. The gripper cylinder includes a stationary stator and a gripper spindle assembly mounted to the cylinder. The gripper spindle assembly includes a gripper pivotably mounted to a gripper support. Instead of using a mechanical cam, the gripper can be controllably pivoted together with a cam roller by an armature that can be magnetized but is not permanently magnetic when an electric current flows through the stator thereby magnetizing a housing of the stator. The armature may be magnetically urged against the restoring force of a spring.

REFERENCES:
patent: 3768406 (1973-10-01), Gutsche et al.
patent: 3937142 (1976-02-01), Cerny et al.
patent: 5125334 (1992-06-01), Marx et al.
patent: 5333547 (1994-08-01), Pfisterer et al.

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