US 4,068,586 AGranted

Cylinder for clamping printing plates

AssigneeAlbert-Frankenthal AG

InventorsRudolf Frey, Joachim Bernauer, Pirmin Gobel

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Abstract

A cylinder for clamping printing plates for photogravure printing wherein the cylinder has a longitudinal bore comprising at least one clamping spindle with a surface for receiving the printing plate ends said at least the clamping spindle runs on the radius of the surface of the cylinder, wherein in the clamping and closing position, the cylinder bore is closed. The clamping spindle is flattened on the inside and loosely supports a continuous cylindrical cup which is positioned in the axis radial in the clamped and locked position of the clamping spindle. There is a tension spring and ball disposed in a lateral bore of the clamping spindle for supporting the spindle with respect to the cylinder bore wall at the side which is opposite to the advancing side of the cylinder.

Claims7

Dependent claims

A cylinder for clamping printing plates for photogravure printing, wherein the cylinder has at least one longitudinally-extending, bore opening onto the cylindrical, circumferential surface thereof, comprising:

at least one clamping spindle mounted for reciprocable-rotatable movement within said at least one bore of said cylinder for movement between a release position and a clamping position, said spindle having a longitudinally-extending, generally cylindrical, peripheral surface portion, which lies flush with the circumferential surface of said cylinder, when said spindle is in a clamping position, and a pair of longitudinally-extending grooves disposed on opposite sides of said cylindrical surface portion, one of which serves to retain one end of a printing plate and both of which serve to retain sealing means, said spindle also including a generally flattened, peripheral surface portion adjacent to the side of said one-end retaining groove thereof, opposite the cylindrical surface portion, for retaining in cooperation with the surface of said bore of said cylinder, the other end of the printing plate;
and
sealing means disposed with said grooves of said spindle for effecting sealing engagement of said spindle within said bore of said cylinder.

Dependencies are inferred from the claim text.