The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 12, 1985
Filed:
Oct. 21, 1983
Kazuhiro Wakamatsu, Hitachi, JP;
Yoshio Kawamata, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An electrophotographic printer for producing a print of compound copied image and printed character image on a printing medium. The printer has a copying exposure system for forming the first electrostatic latent image on the printing medium on a drum 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 for forming 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 in accordance with literal information to be printed. In order that the first and second latent images do not interfere with each other, a main sequence controller provides positional sync signals when the drum has specified positional relations with both exposure systems, information on the positional relations between the exposure systems and the drum is produced from the signal, and a composing sequence controller controls the optical switch and laser beam scanner in accordance with the positional information and information on composing positions stored in a frame composition buffer storing frame composing information.