| 摘要 |
In a printing-plate preparation apparatus employed in a screen printing machine comprising a thermal printhead provided with a heating-element portion, a rotatably supported platen roller for delivering a stencil paper and urging the same against a surface of the heating-element portion of the thermal printhead, and a manuscript-reading unit movable back and forth between a first position and a second position an improvement resides in that an outer peripheral surface of the platen roller is made of non-adhesive material while urged against a surface of the heating-element portion of the thermal printhead, whereby the stencil paper is clamped between the platen roller and the thermal printhead so as to be delivered while subjected to a perforation operation conducted by the heating-element portion of the thermal printhead.
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