Bi-axial stretching machine

Claim 1

IN A BI-AXIAL WEB STRETCHING MACHINE THE COMBINATION COMPRISING, MEANS FOR FEEDING A WEB OF MATERIAL TO AND THROUGH A STRETCHING ZONE, SAID STRETCHING ZONE BEING DEFINED BY GUIDE MEANS ARRANGED IN A DIVERGING RELATIONSHIP RELATIVE TO THE LONGITUDINAL AXIS AND DIRECTION OF TRAVEL OF SAID WEB, AND A PLURALITY OF CLAMPING MEANS MOVABLE ALONG SAID GUIDE MEANS FOR GRIPPING THE EDGE OF SAID WEB AND ADVANCING SAID WEB THROUGH THE STRETCHING ZONE; EACH OF SAID CLAMPING MEANS INCLUDING A BODY PORTION HAVING A LOWER PROJECTING EXTENSION FOR ENGAGING SAID FEEDING MEANS FOR ADVANCING SAID BODY PORTION ALONG SAID GUIDE MEANS IN FIXED RELATION THERETO, ELONGATED SLIPPER BEARING MEANS COOPERATIVE WITH SAID GUIDE MEANS FOR PREVENTING ROTATION OF SAID BODY PORTION RELATIVE TO SAID GUIDE MEANS, AND CLAMPING ARM MEANS PIVOTALLY MOUNTED UPON SAID BODY PORTION FOR ENGAGING THE EDGE OF SAID WEB, WHEREBY SAID CLAMPING ARM MEANS MAY ROTATE RELATIVE TO SAID BODY PORTION WHILE PASSING THROUGH SAID STRETCHING ZONE TO THEREBY EQUALIZE ANY UNEVEN SPEED OF FEED AND ANGLE OF TENSION IN SAID WEB AND REDUCE STRESS CONCENTRATIONS IN SAID STRETCHING ZONE.