Veb Polygraph Leipzig Kombinat Fur Polygraphische Maschinen Und

Rudi Riedl

Hans Johne

Karl-Heinz Forster

Alfred Schott

Gunter Weisbach

Werner Lein

Helmut Schone

Albrecht Johne

Lothar Vetter

Rainer Nitsch

Regina Jungnickel

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

Leipzig, Germany

Rudi Riedl