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21.发明授权公开(公告)号：US06172696B2
公开(公告)日：2001-01-09
申请号：US09186068
申请日：1998-11-05
IPC分类号： B41J2385
CPC分类号： H04N1/0473 , B41J2/473 , B41J11/42 , H04N1/1135 , H04N1/12 , H04N2201/02439 , H04N2201/0471 , H04N2201/04732 , H04N2201/04744 , H04N2201/04755 , H04N2201/04794
摘要： A rotational shaft of a photosensitive drum is connected to a rotational shaft of a stepping motor by a coupling, so that the stepping motor directly drives the photosensitive drum. Here, &thgr; (°) indicating a step angle of the stepping motor, p (mm) indicating a distance between scanning lines on the photosensitive drum, &pgr; indicating the circular constant, and d (mm) indicating a diameter of the photosensitive drum are set so as to satisfy an equation n·&thgr;=(360·p)/(&pgr;·d) to make an optical unit scan the photosensitive drum by one scanning line every time the photosensitive drum is made to rotate n steps, n being a positive integer.
摘要翻译： 感光鼓的旋转轴通过联接器连接到步进电动机的旋转轴，使得步进电机直接驱动感光鼓。 这里，表示步进电机的步进角度的θ（°），表示感光鼓上的扫描线之间的距离的p（mm），表示圆形常数的pi和表示感光鼓的直径的d（mm） 以满足方程n.theta =（360.p）/（pi.d），以使得每次使感光鼓旋转n个步骤时，使光学单元在一个扫描线上扫描感光鼓，n为正 整数。
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公开(公告)号：US06166510A
公开(公告)日：2000-12-26
申请号：US210983
申请日：1998-12-14
CPC分类号： G03G15/5008 , G03G2215/0119
摘要： 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.
摘要翻译： 在通过转印到转印鼓上形成图像的图像形成装置中，形成在由步进电动机直接驱动的感光部件的表面上的调色剂图像，步进电机的步进角θ（θ）与 感光鼓的旋转速度“N”（rpm）由等式θ
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