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. 10, 1987
Filed:
May. 12, 1986
Akira Ogita, Sagamihara, JP;
Masaaki Tanaka, Yokohama, JP;
Shinko Electric Co., Ltd., Tokyo, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
A color copying machine includes scanning device for applying illumination onto a color original to effect a scanning operation. A color separator includes a plurality of optical filters of different colors, each of the filters allowing a predetermined light component of the illumination to pass therethrough during each scanning operation so as to apply it onto a photoconductive drum charged uniformly to form an electrostatic image thereon. Color toner is applied to each of the electrostatic images during the rotation of the photoconductive drum. The toner image on the photoconductive drum is transferred to a record sheet on a transfer drum. Two sensors are provided for sensing the initiation of each scanning operation and the position of the record sheet on the transfer drum. A control circuit detects, in response to the outputs of the two sensors, start and end timings of the transferring of each of the toner images onto the record sheet. The control circuit controls the transfer drum to rotate at the same speed as the photoconductive drum during the transfer of each toner image to said record sheet, and controls the transfer drum to rotate, during a time interval between the two consecutive transfer operations, at such a speed that a leading edge of the record sheet on the transfer drum is brought into agreement with a leading edge of each toner image on the photoconductive drum.