Veb Polygraph Leipzig Kombinat Fur Polygraphische Maschinen Und

Veb Polygraph Leipzog Kombinat Fur Polygraphische Maschinen Und

Lothar Vetter

Karl-Heinz Forster

Hans Johne

Gunter Weisbach

Alfred Schott

Werner Lein

Helmut Schone

Albrecht Johne

Klaus Schanze

Rainer Nitsch

Rudi Riedl

Regina Jungnickel

A sheet printing station is arranged between a sheet pick-up station and a sheet discharge station. A plurality of linear motors is provided, including electrically conductive rails which constitute the stators of the motors and are mounted at opposite lateral sides of the stations. Each of the rails form an endless loop which connects all of the stations. One or more carriages are mounted on the rails for travel along the same and constitute the armature of the respective motors. Sheet grippers are arranged on the carriage or carriages, and a control arrangement controls the travel of the carriage or carriages along the rails.

Printing machine

A printing machine receives single sheets which are removed from a stack by the suction cups of a feeding mechanism which is combined with a monitoring unit serving to detect the absence of sheets at the undersides of suction cups or the lifting of two or more sheets. The monitoring unit employs a transducer having two feelers which determine the thickness of lifted sheet material and an indicating device which is actuated by the feelers and produces signals serving to indicate the absence of sheets, the lifting of two or more sheets and/or to control the operation of the printing machine. The suction cups can form part of the transducer when the latter is designed to detect only the absence of sheets or they form part of a second transducer which is provided in addition to the first mentioned transducer.

Method and apparatus for controlled feeding of sheets to printing

Growing community of inventors

Radebeul, Germany

Lothar Vetter