Web rewinding apparatus

Claim 1

A WEB TAKE-UP APPARATUS FOR A DRIVEN ELONGATED WEB, SAID WEB TAKE-UP APPARATUS COMPRISING (A) A FRAME MEMBER ADAPTED TO BE SUPPORTED IN PROXIMITY TO THE PATH OF TRAVEL TAKEN BY THE WEB AS IT IS DRIVEN FORWARDLY, (B) A SLACK LET-OFF ASSEMBLY CARRIED BY SAID FRAME MEMBER, SAID SLACK LET-OFF ASSEMBLY INCLUDING (1) A STATIONARY SHAFT, (2) A DANCING ROLL DISPOSED BELOW SAID SHAFT, (3) MEANS LOOSELY SUPPORTING SAID DANCING ROLL FOR LIMITED FLOATING MOVEMENT IN WHICH SAID DANCING ROLL IS GENERALLY CONSTRAINED IN PARALLEL RELATION TO SAID SHAFT, (4) AN IDLER ROLL DISPOSED FORWARDLY OF SAID DANCING ROLL AND BELOW SAID SHAFT IN PARALLEL RELATION TO SAID SHAFT, (5) MEANS CONNECTING SAID IDLER ROLL TO SAID SHAFT FOR ARCUATE MOVEMENT OF SAID IDLER ROLL ABOUT THE AXIS OF SAID DRAFT, AND (6) RESILIENT MEANS OPERABLY CONNECTED TO SAID IDLER ROLL FOR BIASING SAID IDLER ROLL IN A DIRECTION TOWARD SAID DANCING ROLL; (C) A TAKE-UP ROLL DISPOSED AFTER SAID SLACK LET-OFF ASSEMBLY AND CONSTITUTING THE END OF THE PATH OF TRAVEL OF THE WEB, (D) SAID SHAFT, SAID DANCING ROLL, AND SAID IDLER ROLL EXTENDING TRANSVERSELY TO THE PATH OF TRAVEL OF THE WEB, AND THE WEB BEING ADAPTED TO ENGAGINGLY PASS BE- WEB, NEATH SAID DANCING ROLL, OVER SAID SHAFT, AND BENEATH SAID IDLER ROLL TO SAID TAKE-UP ROLL, (E) MEANS TO DRIVE SAID TAKE-UP ROLL IN RESPONSE TO THE DELIVERY OF THE WEB THERETO, AND (F) SAID IDLER ROLL OSCILLATING IN AN ARC ABOUT THE AXIS OF SAID SHAFT TO COMPENSATE FOR ANY TENDENCY TOWARD VARIATIONS IN TENSION IN THE WEB SO THAT A SUBSTANTIALLY UNIFORM TENSION MAY BE MAINTAINED IN THE WEB AS IT IS DELIVERED TO SAID TAKE-UP ROLL.