| 摘要 |
The device comprises three main assemblies: - an exposure assembly; - a dark-room assembly comprising a plate 15, where the image to be printed and developed coming from the objective lens is projected, which plate is formed by a vertical grid 31 combined with means 35-38 intended to press the paper sheet against the said plate 31; - a development assembly, characterised in that this grid 31 is covered, over the face intended to come into contact with the sheet, by a plurality of parallel-spaced smooth vertical strips 43 made from a material having a low coefficient of friction with respect to the paper sheet. <IMAGE>
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