Eastman-kodak Company

Jörg Leyser

Eckhard Bauer

Soenke Christian Bluethgen

Dimitrios Kostudis

Stefan Schluenss

Ingo Neuber

Uwe Weinlich

A lifting unit and a process for lifting a stack of sheets having at least a first support () and at least a second support () are described. The first support defines a first con-toured or flat support surface, and the second support defines a second support surface which has a substantially horizontal, flat main surface. In the lifting unit at least one unit is provided for lifting the first and second supports. During operation the supports are lifted such that at least a highest point of the first support is kept elevationally above the second support, the second support is lifted more quickly than the first support, and the substantially horizontal, flat main surface of the second support is kept in its horizontal alignment. The lifting unit is described, in combination with a sheet feeder.

Sheet feeder having lifting unit

Preparing substrates for one-sided or two-sided printing in an electrophotograpically operated digital printing apparatus, in which process substrates are fed out of a supply unit or several supply units onto a conveyor operation sequence and are transferred, preferably in the course of the conveyor operation sequence, onto a conveyor belt that runs through a printing unit, with the least possible space between successive substrates. An acceleration time related to the type of substrate stock, of which the substrate is composed, is selected for feeding a substrate from a supply unit or from the supply unit.

Process and device for supplying substrates in a printing unit

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Kiel, Germany

Jörg Leyser