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:
Dec. 25, 2000
Filed:
Dec. 13, 1998
Toshikazu Higashi, Toyokawa, JP;
Tomonobu Tamura, Aichi-Ken, JP;
Teruhiko Fujikura, Aichi-Ken, JP;
Akira Takasu, Toyokawa, JP;
Minolta Co., Ltd., Osaka, JP;
Abstract
In an image forming apparatus which forms images by transferring to a transfer drum a toner image formed on the surface of the photosensitive member directly driven by a stepping motor, the relationship between the stepping angle '.theta.' (.degree.) of the stepping motor and the rotational speed 'N' (rpm) of the photosensitive drum is expressed by the equation .theta..ltoreq.(360.times.N)/(60.times.a.times.b). Where 'a' is a natural number, optimally 10, which is less than the initial predetermined tolerance value when the harmonic content of rotational variation generated by the step period of the stepping motor is '1/a', and 'b' is the target frequency (Hz) of 100.