Printing unit for printing sheets, cartons, paper, etc.

摘要

The invention relates to an inking system for the printing roller of a printing unit for printing sheets, cartons, paper, etc., comprising an ink container, a take-up roller which dips into the latter, and an ink transfer roller which transfers the ink from the take-up roller to the printing roller, take-up roller and ink transfer roller being secured in two side plates which are arranged such that they can be rotated about a horizontal axis of rotation parallel to the printing roller, said axis of rotation being arranged at a distance from the plane connecting the longitudinal axes of printing roller and ink transfer roller. The invention further relates to a friction drive for the printing roller of a printing unit for printing sheets, cartons, paper, etc., there being provided, on one or both sides of the printing region on the printing roller, radially open, encircling grooves which are of changeable cross-section and are intended for receiving in each case one elastic ring, which projects radially beyond the outer surface of the printing roller. Finally, the invention relates to a friction drive for the printing roller of a printing unit for printing sheets, cartons, paper, etc., there being provided, on one or both sides of the printing region on the printing roller or the axis thereof, in each case one conical region for receiving an internal likewise conical, radially expansible carrier body for an elastic friction covering, the carrier body exhibiting an approximately cylindrical outer surface.