PURPOSE: To promote automatic preparation of the titled plates without damaging base papers by a method in which non-perforated portion for coupling a plate cylinder is provided at the tip of the base paper, and the combined body of the base paper after preparing stencil plate and a manuscript is automatically peeled off and both are separated and discharged.

CONSTITUTION: After the stencil plate for the next one of base papers S is completed, rollers 13 and 16 are again turned and sending of a composite is again carried out when a light exposer 1 goes down, but before this, a solenoid device 32 is electrially energized, the roller 27 in the retreat position is moved to its action position, and the roller 27 is pressed against the roller 16 through the base paper S landed on the periphery of the roller 16. By this, the base paper S is put between the rollers 16 and 27 and tensed as the combined body is sent out, while the manuscript O separated from the base paper S is placed on a manuscript receiving plate 34 without hanging down under its rigity, and the base paper S is separated from the paper O as it advances straight under the guidance of the plate 34 and the combined body is sent out and then discharged onto a manuscript sending and guide plate 40 by the roller 38.