Mechanism for maintaining the registry of a web in relation to apparatus for working on such web

Claim 1

FOR AN APPARATUS WHICH IS LONGITUDINALLY MOVING A WEB HAVING EQUI-SPACED PERFORATIONS THEREALONG, FIRST AND SECOND REVOLVABLY MOUNTED, PARALLEL IDLER ROLLERS, MEANS ASSOCIATING SAID ROLLERS WHEREBY ON THE ROTATION OF THE FIRST ROLLER, THE SECOND WILL ALSO ROTATE; SAID WEB BEING BETWEEN SAID ROLLERS AND RESTING AGAINST THE FIRST ROLLER; SAID FIRST ROLLER BEING CYLINDRICAL AND HAVING TEETH EQUISPACED THEREAROUND WHEREBY SAID FIRST ROLLER SERVES AS A SPROCKET WHOSE TEETH SLIDABLY FIT IN HOLES IN SAID WEB AS THE WEB MOVES ALONG; THE SECOND ROLLER HAVING SPACES THEREIN TO RECEIVE SAID TEETH AS SAID ROLLER ROTATE; THE PERIPHERY OF THE SECOND ROLLER INCLUDING LONGITUDINAL SEGMENTS OF ONE CYLINDRICAL SURFACE; SAID SPACES TO RECEIVE SAID TEETH, BEING IN SAID SEGMENTS RESPECTIVELY; THE REMAINDER OF THE PERIPHERY OF SAID SECOND ROLLER BEING INWARD OF SAID ONE CYLINDRICAL SURFACE; THE WEB BEING ENGAGED BY SAID ROLLERS AS IT WOULD BE BY NIP ROLLERS, ONLY WHEN IT IS CONTACTED BY A SEGMENT, WHEREBY THE WEB IS MAINTAINED SO THAT EVERY HOLE THEREIN HAVING A TOOTH OF THE SPROCKET THERETHROUGH, REMAINS UNCHANGED IN SIZE AND SHAPE.