Fitzpatrick, Cella, Harper & Scinto
Image forming apparatus having a rotatable image bearing member supported and positioned relative to a main body of the apparatus by a shaft and image forming means positioned relative to the shaft
 An image forming apparatus has a rotation shaft which supports an image bearing body and positions the image bearing body and image forming device when they are detachably mounted on the main body. The image forming device includes a frame that have bearings for supporting the shaft of the image bearing body. The image bearing body and a rotating body of the image forming device are separately rotated and do not come into contact with each other via spacer rollers. Accordingly, the mechanical vibration of the rotating body is not transmitted to the image bearing body, and an image can be obtained without defects caused by the mechanical vibration. 
Canon Kabushiki Kaisha
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Akio
Ohno