Web slitting and grooving apparatus and method

Claim 1

IN APPARATUS FOR MAKING A SPIRALLY WOUND ROLL OF PAPER TOWELING OR THE LIKE HAVING AN INTEGRAL SUPPORT ELEMENT AT ONE END THEREOF, MEANS FOR ADVANCING ALONG A PREDETERMINED PATH A WEB OF MATERIAL FROM WHICH SUCH ROLL IS WOUND, A KNIFE DISPOSED ALONG SUCH PATH FOR ENGAGEMENT WITH SUCH WEB TO CUT THE SAME LONGITUDINALLY DURING THE ADVANCEMENT THEREOF AND BEING SUPPORTED FOR RECIPROCABLE DISPLACEMENTS TRANSVERSELY OF THE WEB, ACTUATING MECHANISM FOR RECIPROCABLY DISPLACING SAID KNIFE TRANSVERSELY OF SUCH WEB DURING THE ADVANCEMENT THEREOF, CONTROL MEANS FOR ENERGIZING SAID ACTUATING MECHANISM IN TIMED RELATION WITH THE ADVANCEMENT OF SUCH WEB TO EFFECT AT PREDETERMINED LOCATIONS THEREALONG DISPLACEMENT OF SAID KNIFE FIRST IN ONE TRANSVERSE DIRECTION WITH RESPECT TO THE WEB AND THEREAFTER IN THE OPPOSITE DIRECTION WITH RESPECT THERETO TO CUT THE SAME IN A PREDETERMINED PATTERN ALONG A LONGITUDINAL EDGE PORTION THEREOF, AND MEANS FOR WINDING THE THUSLY CUT WEB IN SPIRAL CONVOLUTIONS TO FORM SUCH ROLL WHEREBY SAID SUPPORT ELEMENT IS INTEGRALLY DEFINED IN SAID ROLL BY THE SPIRALLY WOUND WEB FORMING THE SAME, SAID CONTROL MEANS INCLUDING MEANS RESPONSIVE TO THE RADIAL DIMENSION OF THE ROLL BEING WOUND IN SUCH SPIRAL CONVOLUTIONS FOR ENERGIZING SAID ACTUATING MECHANISM.