| 摘要 |
<p>A printer for printing a unique series of characters on a form fed along a print path has a plurality of print stations (19) each having a print roll (23) provided with a number wheel (27) able to print a selected distinct character on a form fed along the path. The character printed at any one station (19) can be changed by operation of an electro-magnetic mechanism (31-37). On feeding a form along the print path, an aligned string of adjacent characters is built up by each successive printing operation performed by each print station, and between each form printing operation, the character printed by at least one printer station is changed.</p> |
