| 摘要 |
<p>A step and repeat adaptor for a large size platemaker is provided for enabling the simultaneous printing of several impressions of relatively small objects such as documents by a single large photosensitive sheet and as a result, considerable photosensitive material and preparation time is saved. A first vertically oriented flat rectangular light blocking mask overlaying the plate is translatable in a horizontal direction and a second horizontally oriented flat rectangular mask overlaying the plate is translatable in a vertical direction, thereby to provide for the successive imaging of four relatively small objects upon the four quadrants of the large photosensitive plate. One or both of the masks are removable to provide for the "2-up" imaging, or the imaging of a single large object respectively, upon the entire exposure area of the plate.</p> |
