Device for a controlled separation of waste from printed material

摘要

The invention relates to a device for the monitored elimination of waste pieces from printed material, especially on a cutting cylinder, the device being characterised by the following features: a cylindrical casing (2) of a cutting cylinder (1) is rotatably accommodated on a cylinder shaft (4). The cylinder shaft (4) has both a high pressure pipe (20, 21) and a low pressure pipe (22, 23). Between the rotatable cylindrical casing (2) and the cylinder shaft (4) there are arranged chambers (26, 27) which are permanently under pressure and are permanently acted upon by a vacuum, while the bores (3) provided in the cylindrical casing (2) of the cutting cylinder (1) alternately function as blowing and sucking apertures during rotation of the cylindrical casing (2).