Patent ID: 7913618
Filing Date: 2011-03-29
Classification: B21D,B44B,Y10T

Abstract:
1. A punch press tool for stamping successive multicharacter impressions into a workpiece comprising, a guide body adapted to be mounted upon a punch press for being positioned beneath an operating ram of the punch press, a stamp driver slidably mounted relative the guide body for being driven downwardly by the operating ram of the punch press, a multicharacter marking stamp supported on the stamp driver above the workpiece for reciprocal movement thereon to be driven downwardly toward the workpiece by the ram, said marking stamp having multicharacter wheels adapted to rotate for sequentially advancing raised characters thereon responsive to the movement of a character advancing arm, a stamp lever assembly having at least one character stamp operating lever operatively associated with the punch press tool for articulation responsive to movement imparted to the tool by a stroke of the punch press ram, said lever assembly also being operatively associated with the character advancing arm of the marking stamp for indexing the arm to sequentially position successive characters thereof responsive to a stroke of the punch press ram, each downward stroke of the ram drives successive raised characters of the marking stamp that are in an operative position downwardly into an upper surface of the workpiece to provide an impression of the characters therein, and the stamp lever assembly includes a driving lever having an outer end pivotally connected to the guide body, a central end operatively associated with one end of a driven lever and a pivotal connection to the stamp driver intermediate the ends thereof, said driven lever has an end portion opposite said one end that is operatively associated with the character advancing arm of the stamp and an intermediate pivotal connection to the stamp driver and said end portion of the driven lever is free to pivot upwardly when the stamp driver is forced downwardly through the guide body of the tool for operating said character stamp.