Knife mechanism for tufting machines

Claim 1

IN A TUFTING MACHINE HAVING AN ENDWISE-MOVABLE NEEDLE ADAPTED TO PENETRATE A BACKING FABRIC AND TO PROJECT A LOOP OF YARN THERETHROUGH, A HOOK HAVING A LOOP SEIZING BLADE ADAPTED TO ENTER A LOOP OF YARN PRESENTED BY SAID NEEDLE, AND A KNIFE MECHANISM COOPERATING WITH SAID HOOK TO SEVER LOOPS THEREON TO FORM CUT PILE, SAID KNIFE MECHANISM COMPRISING A KNIFE DISPOSED I N ABUTMENT WITH SAID HOOK, A KNIFE-CARRYING ELEMENT CONTACTING SAID KNIFE ON THE OPPOSITE SIDE OF SID KNIFE FROM SAID HOOK AND BIASING SAID KNIFE IN ABUTMENT WITH SAID HOOK, MEANS COUPLING SAID KNIFE TO SAID KNIFE-CARRYING ELEMENT FOR IMPARTING LOOP SEVERING ACTUATION TO SAID KNIFE UPON ACTUATION OF SAID KNIFE-CARRYING ELEMENT ABOUT AN AXIS IN RELATIVE TO SAID KNIE-CARRYING ELEMENT ABOUT AN AXIS IN A DIRECTION NORMAL TO THE FACE OF SAID HOOK TO PROVIDE FOR SEATING OF SAID KNIFE FLAT UPON THE FACE OF SAID HOOK.