| 摘要 |
<p>Compound copied image (41a) and printed character image (41b) on a printing medium (41). A printer comprises copying exposure system (6, 7, 8) for the first electrostatic latent image (1) by the exposure of the medium to an image in a certain area of a copy text through an electrically controlled optical switch, and a printing exposure system (11, 31, 34, 35, 36, 37) for the second electrostatic latent image by the exposure of the printing medium to a scanning laser beam which is modulated by a laser beam generator (12) in accordance with literal information to be printed. In order that the first and second latent image do not interfere with each other, a main sequence controller (29) provides positional sync signals; information on the positional relations between the exposure systems and the drum is produced therefrom; a composing sequence controller (30) controls the optical switch (7, 8) and laser beam scanner (11) in accordance with a composition buffer (33) storing frame composing information. </p> |
