Dr. Ing. Rudolf Hell Gmbh

Linotype-hell Ag

Hans Penza

Gunnar Behrens

Bernd Lassen

Ralf Balzeit

Norbert Roth

Gerhard Bloehdorn

Reinhard Gesell

Eckhard Lindemann

Rolf Angelbeck

Dietrich Asbach

Dieter Block

Gerhard Blohdorn

Karl-Wilhelm Schmuck

Siegfried Segler

Device for clamping and releasing film material and operation of said

Device for automatically clamping and releasing recording material and

Pressure-tight vacuum chamber of an electron beam engraving machine for

A holding device using a vacuum clamp arrangement has a suction box closed by a suction plate having a holding surface provided with a plurality of suction bores extending from the holding surface into the suction box. Each of the suction bores has an enlarged expanded bore portion inwardly spaced from the holding surface to form a valve chamber which valve chamber is closed by an inner section of the suction bore between the chamber and the suction box and each of the valve chambers loosely receives the shaped valve reed which will close the inner section of the suction bore for each of the suction bore arrangements which is not covered by the sheet placed on the holding surface. This simple structure keeps vacuum losses low and, therefore, enables utilizing a relatively small vacuum pump for the device.

Vacuum holding device

A device for automatic loading of film material on a suction plate by transport roller pairs arranged at two oppositely disposed ends of the suction plate. One pair receives the film material and the other pair further transports the film material. At the two other lateral sides or ends of the suction plate, a roller is respectively provided extending over an entire side of the plate. A cloth can be wound on this roller such that the roller and cloth are so arranged that they respectively form a blind covering the suction plate up to and overlapping lateral edges of the film material.

Device for the automatic loading of film material on a suction plate

Growing community of inventors

Preetz, Germany

Hans Penza