| 摘要 |
PCT No. PCT/SE92/00356 Sec. 371 Date Oct. 26, 1993 Sec. 102(e) Date Oct. 26, 1993 PCT Filed May 26, 1992 PCT Pub. No. WO92/21518 PCT Pub. Date Dec. 10, 1992A method and an apparatus for exposing multi-pages original images or several separate text and/or picture portions onto a light sensitive material like an offset plate or an intaglio plate by a laser exposure process. The apparatus includes a cassette for a light sensitive material, a laser unit for exposing the light sensitive material, a discharge conveyor for the exposed light sensitive material, and an exposure table which is stepwise movable between the plate cassette and the discharge conveyor and under the laser unit. The exposure table is formed with a device for holding the light sensitive material in a predetermined position thereon. The laser unit includes a laser carriage which is arranged for taking two different positions, namely a raised position in which the exposure table with the plate can be moved freely under the laser unit, and a lowered position, in which the laser carriage is being pressed into locking engagement with a portion of the plate on the exposure table for making it impossible for the plate and the laser unit to move in relation to each other. When locked in place, a laser gun movably mounted on the laser carriage is moved to expose the underlying portion of the plate. |
