| 摘要 |
<p>An improvement in sensing indicia embossed on the surface of data cards. The sensing head frame is designed to ride the surface of the card and thereby position the sensing elements with respect to the card surface at all times. Also, the sensing head frame is designed to align itself with the top and bottom of characters embossed on the surface of the card. The design of the sensing elements allows the reading of small characters.</p> |
