Lochvorrichtung fuer Aufzeichnungstraeger

摘要

A punch mechanism including a line of punches each having an interposer disposed between it and reciprocating drive mechanism. The interposers are reciprocably disposed in slots in a guide block, being pivoted therein by virtue of end walls of the slots acting on the edges of the interposers. A pneumatic piston is provided for moving each of the interposers into alignment with the drive mechanism to cause a punching action, and permanent magnets are provided for moving and holding the interposers in their inactive positions.