Punching device having a spring biased stripper

Claim 1

A PUNCHING DEVICE COMPRISING IN COMBINATION: A C-SHAPED FRAME HAVING UPPER AND LOWER ARMS WITH AXIALLY ALIGNED BORES THEREIN; AN APERTURED DIE REMOVABLY SECURED IN THE BORE OF THE LOWER OF SAID ARMS; A PUNCH AND GUIDE ASSEMBLY RECIPROCABLY DISPOSED IN THE BORE OF THE UPPER OF SAID ARMS, SAID ASSEMBLY INCLUDING AN ELONGATED PUNCHGUIDE SLEEVE, AN UPPER ANNULAR COLLAR SLIDABLY SURROUNDING THE UPPER END OF SAID SLEEVE AND A LOWER ANNULAR COLLAR SURROUNDING THE LOWER END OF SAID SLEEVE, A STRIPPING SPRING MEANS EXTENDING ABOUT SAID SLEEVE AND BIASING SAID COLLARS APART, A PAIR OF SNAP RINGS EACH CARRIED BY ONE END OF SAID SLEEVE AND ACTING AGAINST SAID COLLARS TO HOLD SAID STRIPPING SPRING MEANS IN PARTIAL COMPRESSION, SAID COLLARS EACH HAVING A SURFACE IN DIRECT SLIDABLE ENGAGEMENT WITH SAID UPPER ARM, A PUNCH SLIDABLY RECEIVED WITHIN SAID SLEEVE AND GUIDED THEREBY AND HAVING A HEAD END DISPOSED IN AND PROJECTING FROM SAID UPPER COLLAR, A MANUALLY REMOVABLE SNAP RING SECURING SAID HEAD END TO SAID UPPER COLLAR, SAID PUNCH HAVING A WORKING END ADAPTED TO COOPERATE WITH SAID DIE, AND SAID LOWER COLLAR HAVING A DOWNWARDLY DIRECTED INTERNAL RECESS DEFINING A DOWNWARDLY DIRECTED ANNULAR SHOULDER WITHIN THE AXIAL LIMITS OF THE WORKING END OF THE PUNCH, SAID RECESS BEING ADAPTED TO RECEIVE AND REMOVABLY RETAIN A STRIPPER BUTTON AT SAID WORKING-END OF SAID PUNCH; AND A LIFTING SPRING COACTING BETWEEN SAID UPPER ARM AND SAID UPPER COLLAR TO BIAS SAID ASSEMBLY AWAY FROM SAID DIE.