MACHINE D'IMPRESSION A ROULEAU COMPENSATEUR

摘要

A printing machine which has a bed for supporting printing devices and a form to be imprinted, includes a carriage supporting a platen for movement between a raised position spaced from the form, and a lowered position in printing engagement with the form. The carriage is adapted to be moved from a home position across the bed to an actuated position to perform a printing stroke, and back to the home position in readiness for a subsequent printing operation. Means is provided for sensing the thickness of the form to be imprinted, and compensating means is provided for placing the platen at a printing position selected from a plurality of possible positions spaced from the bed as determined by the sensed thickness of the form. The platen is held at the selected printing position during a printing stroke and is restored to its raised position prior to return of the carriage to the home position.