US 5,399,248 A · Clamping device for gravure printing cylinders to be processed in an electroplating plant

Abstract

The invention is directed to a clamping device for gravure printing cylinders to be processed in an electroplating plant. The clamping device for gravure printing cylinders to be processed in an electroplating plant is equipped, in accordance with a first basic solution, with an interchange holder (1) for a plurality of cone sleeves (2) which have an inside diameter adapted to different spindle ends of various gravure printing cylinders, so that adaptation to a respective identical receiving cone quill (8) is made possible and in the same electroplating plant a plurality of different printing cylinders can be continuously successively processed without the complicated fitting and removal of different collet chucks. According to a second basic solution the interchange holder and the different cone sleeves are not required for the clamping device. Instead, a hardened cone sleeve (21) is used as essential clamping element and clamping is effected with very high contact pressure. Because of the practically gastight connection between the cylinder spindle end and the wall of the hollow cone, very high currents can surprisingly be transmitted.

Claims19

Dependent claims

A clamping device for gravure printing cylinders which have different spindle diameters, to be processed in an electroplating plant, wherein the current is transmitted from a current supply system to outer ends of the gravure printing cylinders introduced into the plant, comprising:

a plurality of cone sleeves each having an external cone, and an outside diameter, the cone sleeves having the same outside diameter and an inside diameter adapted to a determined spindle end diameter of different gravure printing cylinders;
an intermediate sliding member mounted in each cone sleeve for axial sliding;
a movably mounted interchange holder receiving the plurality of cone sleeves, each cone sleeve is provided with an intermediate sliding member, in bores adapted to their outside diameter;
a quill cone sleeve which serves to transmit current to a spindle end by a corresponding cone sleeve and whose internal cone is adapted to a respective identical external cone of the external cone sleeves;
an ejector device mounted concentrically to the quill cone sleeve for axial displacement of a respective intermediate sliding member and the respective external cone sleeve to the released position inside the respective bore corresponding to the external cone sleeve in an interchange holder;
and
said interchange holder is a rotatably mounted interchange disc in which the axes of the receiving bores for the cone sleeves are disposed on a concentric circle.

4 more elements

Dependencies are inferred from the claim text.

Clamping device for gravure printing cylinders to be processed in an electroplating plant

Life of this patent

Clamping device for gravure printing cylinders to be processed in an electroplating plant

Life of this patent

Abstract

Claims19