Counterbalancing means for cutoff knives

Claim 1

IN A MECHANISM FOR CUTTING STRIP MATERIAL INCLUDING A FIRST SHAFT; A SOURCE OF POWER FOR DRIVING A SHAFT; A SECOND SHAFT, A KNIFE CUTTING MECHANISM DRIVEN BY SAID SECOND SHAFT; A DRIVING ARM IN DRIVING ENGAGEMENT WITH SAID SECOND SHAFT; MEANS PROVIDING A DRIVING CONNECTION FROM SAID FIRST SHAFT TO SAID DRIVING ARM WHEREBY A CONSTANT ANGULAR SPEED OF ROTATION FOR SAID FIRST SHAFT IS EFFECTIVE TO DRIVE SAID SECOND SHAFT AT A CYCLICALLY VARYING RATE FOR EACH REVOLUTION THEREOF; THE IMPROVEMENT COMPRISING A COUNTERBALANCING ARM FREELY MOUNTED UPON SAID SECOND SHAFT; MEANS PROVIDING A DRIVING CONNECTION FROM SAID FIRST SHAFT TO SAID COUNTERBALANCING ARM WHEREBY A CONSTANT SPEED ROTATION IS EFFECTIVE TO DRIVE SAID COUNTERBALANCING ARM IN THE SAME DIRECTION SAID DRIVING ARM IS OPERATING AT A CYCLICALLY VARYING RATE FOR EACH REVOLUTION THEREOF WITH SAID DRIVING ARM AND SAID COUNTERBALANCING ARM COMPLETE A REVOLUTION IN EQUAL TIME INTERVALS FOR ALL REVOLUTIONS.