Patent Number: 6,166,510

Title: Image forming apparatus

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.

Inventors: Higashi; Toshikazu (Toyokawa, JP), Tamura; Tomonobu (Aichi-Ken, JP), Fujikura; Teruhiko (Aichi-Ken, JP), Takasu; Akira (Toyokawa, JP)

Assignee: Minolta Co., Ltd.

International Classification: G03G 15/00 (20060101); H02K 037/00 ()

Expiration Date: 12/26/2017