Mandrel locking unit for printing roller mandrels in a...

Details Mandrel locking unit for printing roller mandrels in a... Mandrel locking unit for printing roller mandrels in a...

2011-03-08

2011-03-08

Nguyen, Judy (Department: 2854)

Printing

Rolling contact machines

Rotary

C101S247000, C101S375000

Reexamination Certificate

active

07900559

ABSTRACT:
A mandrel-locking unit for a rotary printing machine has a mandrel-mounting element that surrounds print roller mandrels in an inner bearing for mounting a mandrel-supporting surface and into which the mandrel-mounting element can be slid such that the mandrel-supporting surface is released by the sliding movement. The unit has a pressurizing medium cylinder that provides the force required for the sliding movement and a piston, which delimits a pressure chamber of the pressurizing medium cylinder at a boundary surface and which is in contact with the mandrel-mounting element at a connecting point and conveys to the mandrel mounting element the pressure required for the sliding movement. A feature of the unit is that the distance between the boundary surface and the connecting point is smaller than the maximum stroke of the piston in the pressurizing medium cylinder.

REFERENCES:
patent: 2460504 (1949-02-01), Huebner
patent: 3147702 (1964-09-01), Martin
patent: 4083205 (1978-04-01), Clarke et al.
patent: 5562358 (1996-10-01), Okamoto et al.
patent: 5735206 (1998-04-01), Rossini
patent: 5974968 (1999-11-01), Achelpohl et al.
patent: 6473954 (2002-11-01), Rosberg et al.
patent: 2003/0145472 (2003-08-01), Swift
patent: 197 05 369 (1998-09-01), None

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