| 摘要 |
A printing machine which has a bed for supporting printing devices and a form to be imprinted, includes a print head pivotally mounted on a base for movement between an open position and a selected closed position. A carriage supporting a platen is mounted on the print head and the carriage is movable in a path 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 a latching mechanism is provided for latching the print head in closed position, which in fact is a position selected from an infinite number of possible positions within a range as determined by the sensed thickness of the form. The print head is held in the selected closed position during a printing stroke and is restored to its open position prior to return of the carriage to the home position. |
