Automatic rewinding apparatus

Claim 1

AUTOMATIC REWINDING APPARATUS FOR AN ELONGATED WEB, COMPRISING A PAIR OF ROLLS ROTATABLY SUPPORTED ON PARALLEL AXES FOR ATTACHMENT TO THE OPPOSITE ENDS OF AN ELONGATED WEB TO REVERSIBLY WIND THE WEB THEREON; A PAIR OF DISENGAGABLE CLUTCHES EACH INCLUDING AN INPUT DRIVE ELEMENT AND AN OUTPUT DRIVE ELEMENT; EACH OF SAID ROLLS BEING CONNECTED WITH THE OUTPUT DRIVE ELEMENT OF A DIFFERENT ONE OF SAID CLUTCHES; REVERSIBLE PRESSURE-ACTUATED CONTROL MEANS OPERATIVELY CONNECTED WITH SAID CLUTCHES FOR ALTERNATIVELY ENGAGING EITHER ONE THEREOF; MOTIVE MEANS CONNECTED TO DRIVE THE INPUT ELEMENTS OF SAID CLUTCHES IN OPPOSITE ROTATIONAL SENSES; A PAIR OF CAMS DRIVINGLY CONNECTED WITH SAID INPUT ELEMENTS; AN OSCILLATORY ROCK SHAFT PROVIDED WITH A SENSING PADDLE, A CRANK ARM, AND AN ACTUATING ELEMENT FOR SAID PRESSURE-ACTUATED MEANS; A PAIR OF PIVOTALLY-MOUNTED LEVERS, AND MEANS BIASING SAID LEVERS IN OPPOSITE ANGULAR DIRECTIONS EACH TOWARD ENGAGEMENT WITH ONE OF SAID CAMS; SAID CAMS BEING FORMED TO RELEASE SAID LEVERS ALTERNATELY FOR ACTUATION BY SAID BIASING MEANS INTO DRIVING ENGAGEMENT WITH SAID CRANK ARM, TO OSCILLATE SAID PADDLE ALTERNATELY INTO BIASED ENGAGEMENT WITH THE WEB ROLLED ON EACH OF SAID ROLLS, WHEREBY THE ANGULAR DISPLACEMENTS OF SAID ACTUATING ELEMENT ARE LIMITED BY THE ALTERNATE ENGAGEMENTS OF SAID PADDLE WITH THE WEB ROLLS; SAID ACTUATING ELEMENT BEING ARRANGED FOR ANGULAR DISPLACEMENT TO A TERMINAL POSITION, TO ACTUATE SAID CONTROL MEANS AND THUS REVERSE THE DIRECTION OF WINDING OF SAID WEB ON SAID ROLLS, AS THE WEB IS FULLY WOUND ON ONE ROLL AND DEPLETED FROM THE OTHER.