Albert-frankenthal Ag

Fritz Kluzik

Helmut Puschnerat

Manfred Schwaab

Ernst Wilding

Hans Tittes, Deceased

Manfred Junger

Bernd Brehm

A device is provided for the rapid clamping of flexible printing plates on the printing cylinder of rotary printing presses which includes a support bar mounted within and adjacent to the front side of a cylinder groove to which the forward end of plate is clamped by means of clamping springs and a clamping arm disposed opposite of the support bar, which is pivotably mounted within and adjacent to the rear side of the groove and has a plate attachment arm to which the rear end of the plate is clamped. The clamping arm is actuated by means of pressure springs in the clamping direction and in the counter direction by adjustment means so that the plate ends may be clamped independently from one another as well as independently of the plate thickness so as to prevent damage to the plates during the clamping operation and an easy servicing. For this purpose, the support bar and the clamping arm are provided with at least one clamping spring which is engaged by a movable slide which, in turn, is actuated by an actuating pawl extending into the cylinder groove, so that they can be actuated or inactivated relative to the support bar or the clamping arm to which they are attached independently from each other and independently from a pivot movement of the clamping arm.

Quick-acting clamping device

A device for clamping flexible printing plates onto the plate cylinder of rotary printing presses, wherein the plate cylinder has a concentric groove formed in its surface, the groove walls extending at an acute angle into the surface of the plate cylinder to define a pair of hook-like edges at the groove opening for receiving the correspondingly hook-like bent ends of the printing plate. A spindle is pivotably disposed in the groove having an axis concentric with the groove. At least one flange spring is supported on a first side of the spindle which faces a first hook-like wall edge. A clamping element is formed at one the end of the spring for engaging the front end of the printing plate against one of the hook-like groove edges. A bar disposed on the opposite side of the spindle axis and mounted to the spindle, the bar extending into the plate cylinder surface for receiving the hook-like bent rear end of the printing plate. The bar is directed toward the printing plate front end, so that when the spindle is pivoted on its axis, the extending end of the bar will engage the clamping element and urge it against the first hook-like edge of the groove to secure both ends of the printing plate.

Clamping device for flexible printing plates

Growing community of inventors

Frankenthal, Germany

Fritz Kluzik