TRAVELING CYLINDER IMPRINTER WITH WHEEL-CENTERING MEANS AND CYLINDER-LOCKING MEANS FOR VARIABLE DATA INPUT

摘要

A variable data imprinter for use in recording credit card sales transactions is provided having a plurality of indicia bearing toothed print wheels and a corresponding plurality of toothed racks for cooperation with the print wheels so that the print wheels are selectively indexible with respect to a printing position by movement of the respective racks. Control means are provided for centering the print wheels with respect to their printing position and for preventing actuation of a printing roller until such centering operation has been effected. The print wheel centering operation is effected by movement of a lever arm which carries a centering bar for engagement with stops formed on the toothed racks. Movement of the lever arm is also utilized to operate a locking mechanism which normally prevents actuation of the roller until the lever arm is operated.