Patent ID: 7658134
Filing Date: 2010-02-09
Classification: B21D,Y10T

Abstract:
1. A punch canister with a self-contained punch recess adjustment for use with an attachable punch set that includes a guide bushing having a stripper and a punch element, said canister comprising, a canister body having a top end, a bottom end and a central axis extending therebetween, a punch head at the top end of the canister body including an axial shaft with an axial screw thread located for engagement with a punch set, an annular punch recess adjustment member as a part of the canister body at the bottom end thereof that is constructed and arranged for removable attachment to the punch set, the adjustment member being rotatable and slidable on said axis relative to the punch head, a resilient punch retraction member positioned between the punch head and the adjustment member for biasing the adjustment member axially downward on the punch head, a locating element positioned on said adjustment member that is operatively related to the guide bushing of the punch set to prevent rotation between the punch set and the adjustment member when attached thereto, a plurality of circumferentially distributed sockets that are non-rotatably associated with the punch head, a detent on the adjustment member which is operatively associated with the punch head for retaining the adjustment member in a selected one of a plurality of circumferentially distributed angular positions on the punch head by engagement with said plurality of sockets, the detent being disengageable from said plurality of sockets for enabling an operator to rotate the adjustment member relative to the punch head, such that rotation of the adjustment member relative to the punch head rotates the bushing of the punch set relative to the punch head for adjusting the punch set.