| 摘要 |
<p>The adaptor is attached to a mobile chassis (6), and defines a recess (14) into which artwork plates (20,22) may be inserted on either side of the board (21). A flexible membrane (24) extends from the adaptor at the level of the top of the recess (14). In the lower surface, channels extend from the suction orifice for retention of a glass plate (4) as far as the recess. Complementary centring devices are provided on the upper and lower artwork plates and the board to ensure exact registration.</p> |
