SCREEN PRINTING MACHINE WITH COMPUTERIZED SCREEN ADJUSTING MECHANISM

摘要

A screen printing machine with one or more printing units each of which has a screen and at least one squeegee above a portion of the path for a movable web of paper or the like. The positions of the screens are adjustable by carriages which support the frames for the screens and receive motion from sets of motors which respond to signals from a computer. The latter receives signals from cameras which are adjacent the path of movement of the web and monitor alignment marks (if any) on the web and/or the position of printed matter on the web.