Screen printing apparatus

Claim 1

IN A SCREEN PRINTING APPARATUS THE COMBINATION COMPRISING: A PLURALITY OF ROLLS; A SCREEN MAINTAINED IN ENDLESS CONFIGURATION BY AT LEAST ONE LATERAL BAND INTERCONNECTING OPPOSITE ENDS OF SAID SCREEN AND HAVING A PAIR OF CONTINUOUS SIDE BANDS CONTINUOUSLY FASTENED ALONG THE CONTINUOUS OPPOSITE EDGES OF SAID ENDLESS SCREEN, SAID SCREEN AND SIDE BAND BEING TRAINED AROUND SAID ROLLS; A FRAMEWORK FOR SAID APPARATUS MOUNTING A PAIR OF YOKES ALONG OPPOSITE SIDES OF SAID SCREEN; A PAIR OF CONTINUOUS DRIVE BANDS TRAINED AROUND OPPOSITE ENDS OF SAID ROLLS AND DRIVABLY ENGAGED BY SAID ROLLS, EACH OF WHICH IS DETACHABLE AND DRIVINGLY CONNECTED TO ONE OF SAID SIDE BANDS AS A COPLANAR EXTENSION OF SAID SIDE BAND; AND A PLURALITY OF ROLLERS CARRIED BY EACH OF SAID DRIVE BANDS ADAPTED TO BE GUIDED BY SAID YOKES FOR LATERALLY STRESSING SAID SIDE BANDS IN THE PLANE OF SAID SIDE BANDS, SAID ROLLERS AND PAIR OF YOKES BEING ADAPTED TO CONSTRAIN SAID DRIVE BANDS INTO SUBSTANTIALLY COPLANAR RELATIONSHIP WITH SAID SCREEN AND SAID YOKES HAVING A CONSTANT LATERAL SPACING ADAPTED TO LATERALLY TENSION SAID DRIVE BANDS, SIDE BANDS AND SCREEN.