JPS5663449A - Automatic processing machine for autographic stencil paper - Google Patents

Abstract

PURPOSE: To prevent noise, deterioration of an environment and damage of a machine while to effect duplicate faithfully to a manuscript by a method wherein a laser generating unit is provided in the duplicating means.

CONSTITUTION: A rotary drum 3 and a moving table 6 are driven by driving motors 9, 12 to generate a driving pulse from a driving pulse generator 30 and project a light beam from a lamp 13 to a copy 1 through a lens 15 while the reflected light beam is inputted into a receptor element 14 through a lens 16 and a slit 17 and an output signal thereof is inputted into an amplitude modulator 31 and a waveform shaper 35. The modulator 13 modulates the driving pulse inputted from the generator 30 so that an amplitude of the driving pulse becomes small or large, thereafter, outputs the modulated signal into a gate circuit 32. The shaper 35 changes an output of the element 14 into a predetermined square wave output and inputs it into a trigger generator 36 and a trigger pulse is outputted to the circuit 32. Then, the circuit 32 outputs an output corresponding to a letter information to a semiconductor laser generator 33 and the generator 33 outputs a pulselike ultrared rays laser beam in accordance with the output of the circuit 32 while said laser beam is focused to a microscopic area on a recording paper 2 by a lens 34 to punch a hole corresponding to an image element.

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