Roller drive system

Claim 1

IN A DRIVE MECHANISM, THE COMBINATION COMPRISING: AN ENDLESS FLEXIBLE DRIVE BELT; A FIRST PAIR OF SPACED APART OPPOSED ROLLERS BETWEEN WHICH DISCRETE LENGTHS OF WEB MATERIAL ARE DRIVABLE THEREBY, ONE OF SAID ROLLERS OF SAID FIRST PAIR BEING ADAPTED TO BE MOVED LATERALLY RELATIVE TO THE OTHER WITHIN A PREDETERMINED RANGE FOR VARYING THE SPACE THEREBETWEEN IN ACCORDANCE WITH THE THICKNESS OF THE WEB MATERIAL; MEANS ON SAID ROLLERS OF SAID FIRST PAIR CO-OPERATING TO FLEX SAID BELT TRANSVERSELY IN ONE DIRECTION DURING PASSAGE THEREBETWEEN; A SECOND PAIR OF SPACED APART OPPOSED ROLLERS SPACED FROM SAID FIRST PAIR AND RECEPTIVE OF SAID DISCRETE LENGTHS FROM SAID FIRST PAIR IN A DRIVING RELATIONSHIP; ONE OF SAID ROLLERS OF SAID SECOND PAIR ADAPTED TO BE MOVED LATERALLY RELATIVE TO THE OTHER WITHIN SAID PREDETERMINED RANGE FOR SIMILARLY VARYING THE SPACE THEREBETWEEN; MEANS ON SAID ROLLERS OF SAID SECOND PAIR RECEPTIVE OF SAID BELT AND CO-OPERATING TO FLEX SAID BELT TRANSVERSELY IN A DIRECTION OPPOSITE TO SAID ONE DIRECTION WHEREBY SAID BELT DOES NOT DEVELOP A PERMANENT SET; AND MEANS FOR DRIVING SAID BELT TO DRIVE SAID ROLLERS FOR CONVEYING SAID DISCRETE LENGTHS THEREBETWEEN.