Notching unit

Claim 1

NOTCHING APPARATUS FOR USE BETWEEN THE BED AND RAM OF A PRESS, COMPRISING IN COMBINATION: (A) A BASE ADAPTED TO BE SECURED TO THE PRESS BED AND ADAPTED TO DETACHABLY SUPPORT A NOTCHING DIE; (D) A STANDARD EXTENDING UPWARDLY FROM SAID BASE, SAID STANDARD HAVING FIXED SLIDE SURFACE MEANS ALL LYING IN A SINGLE PLANE ADJACENT TO THE OPENING IN THE NOTCHING DIE; (C) A PUNCH HOLDER SLIDABLY DISPOSED AGAINST SAID SLIDE SURFACE MEANS, SAID HOLDER BEING ADAPTED TO SUPPORT NOTCHING PUNCH MEANS BENEATH IT AND TO HOLD THE PUNCH MEANS IN REGISTRATION WITH THE DIE, AND TO BE ENGAGED AT ITS UPPER END BY THE PRESS RAM, SAID HOLDER HAVING AN UPWARDLY DIRECTED EXTERNAL ABUTMENT SURFACE INTEGRAL THEREWITH AND DISPOSED BENEATH SAID UPPER END; (D) A PAIR OF CHEEK PLATES RIGIDLY SECURED TO OPPOSITE SIDES OF SAID STANDARD, AND HAVING CONFRONTING SURFACES EXTENDING PERPENDICULARLY TO SAID PLANE AND SLIDABLY GUIDING OPPOSITE SIDES OF SAID HOLDER, SAID CHECK PLATES EACH HAVING A GIB INTEGRAL THEREWITH AND RESPECTIVELY PROJECTING FROM SAID SURFACES AND TOWARD EACH OTHER, SAID GIBS BEING RECEIVED IN VERTICALLY ELONGATED GROOVES IN SAID HOLDER AND PROVIDING FURTHER GUIDANCE FOR SAID HOLDER; (E) ARRESTING MEANS DIRECTLY SECURED TO SAID STANDARD AND ENGAGEABLE WITH SAID ABUTMENT SURFACE; AND (F) SPRING MEANS BIASING SAID PUNCH HOLDER IN A DIRECTION URGING SAID ABUTMENT SURFACE TOWARD SAID ARRESTING MEANS.