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:
Apr. 21, 1992
Filed:
Oct. 25, 1990
Kazuyuki Shimada, Chofu, JP;
Yoshiharu Niito, Yokohama, JP;
Keiichi Iwasaki, Suita, JP;
Yukitoshi Kiya, Kawasaki, JP;
Hideo Azumai, Yokohama, JP;
Takahiro Yagishita, Yokohama, JP;
Masayoshi Miyamoto, Yokohama, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An image forming apparatus includes an image forming part for forming an image described by a video signal on a recording sheet by carrying out an image forming operation which includes scans in main and sub scan directions, a storage part for storing test pattern data which describes at least one test pattern to be formed on the recording sheet, a generator for generating a generation interval of the video signal in the main and sub scan directions responsive to the test pattern data stored in the storage part, and a controller for controlling the image forming operation of the image forming part by supplying to the image forming part the video signal which describes an arbitrary test pattern and is generated based on the test pattern data read from the storage part with the generation interval generated by the generator.