überwachungsvorrichtung for running on a druckbahn ordered prints with the same pattern

摘要

the invention relates to a u00fcberwachungsvorrichtung for detection of fehldrucken on a printed material at high speed running. the print on the printed material (1), (2) are recorded as if it be stopped.this is done by the application of a geradzahligen polygonal prism (3), which is synchronized with the running speed of the druckmaterials (2) is rotated, and an observer is permitted, the prints (1) on an optical axis (x) below to find out, not only in their position on the optical axis (x),but also to their bewegungspositionen before and behind the optical axis (x) (figure 1).