Patent ID: 7490550

Claim:
A method for checking a correctness of impositions and correct mutual register of the print pages at a front side and a rear side of different types of printed matters using a check print apparatus comprising two co-operating printers, said method comprising: preparing impositions in a control unit of the front side and the rear side of a print original to be made; feeding paper from a roll of paper into an upper printer of the two printers by a roll feeder; printing a plurality of print pages having a first imposition of the front side of the paper; allowing the paper to be placed in a correct feeding position of a lower printer of the two printers provided underneath the upper printer and turned 180° about a vertical axis, wherein the paper always remains above a paper entrance of the lower printer on its way from the upper printer to the lower printer; printing a plurality of print pages having a second imposition on the rear side of the paper with the page in position turned 180°; checking that the first and second impositions printed on the front and rear sides coincide; correcting the first and second impositions using the control unit when the checking step determines the first and second impositions do not coincide; and preparing a print original information based on the first and second impositions coinciding and the correcting step, the print original information being used to print the print original in a main printing device.