Arrangement for threading of webs

Claim 1

IN A TREATMENT PLANT FOR A CONTINUOUS WEB HAVING AT LEAST ONE REVERSING ROLL MOUNTED TO DIRECT THE WEB IN AT LEAST ONE ZIG-ZAG RUN THROUGH SAID PLANT AND THREADING APPARATUS COMPRISING COOPERATING CONFRONTING BAND MEANS FOR ENGAGING OPPOSITE SURFACES OF THE LEADING-END OF THE WEB TO FEED THE SAME THROUGH SAID PLANT, THE IMPROVEMENT WHEREIN ONE OF SAID BAND MEANS IN CARRIED ABOUT SAID REVERSING ROLL AND THE OTHER OF SAID BAND MEANS CONPRISES A SEQUENCE OF AT LEAST TWO SEPARATE BANDS, SAID PLANT INCLUDING TURN MEMBERS FOR SAID SEPARATE BANDS, SAID TURN MEMBERS ENGAGING SAID SEPARATE BANDS ADJACENT SAID REVERSING ROLL AND BEING ORIENTED TO CAUSE THE FIRST BAND OF SAID SEQUENCE TO DEFLECT THE LEADING END ABOUT THE REVERSING ROLL AND TO CAUSE THE NEXT BAND OF SAID SEQUENCE TO ENGAGE THE LEADING-END BETWEEN SAID NEXT BAND AND THE COOPERATING CONFRONTING BAND MEANS, AND STOP MEMBERS AT THE REVERSING ROLL ADAPTED UPON COMPLETION OF THE THREADING TO BE DISPLACED BETWEEN THE REVERSING ROLL AND THE ONE BAND MEANS, THEREBY DISENGAGING THE ONE BAND MEANS ENTIRELY FROM ITS CONTACT WITH THE REVERSING ROLL.