Image forming apparatus having drive system according to loads

Details Image forming apparatus having drive system according to loads Image forming apparatus having drive system according to loads

2006-07-31

2009-06-30

Royer, William J (Department: 2852)

Electrophotography

Image formation

Photoconductive member

C399S299000

Reexamination Certificate

active

07555242

ABSTRACT:
An image forming apparatus includes a plurality of image bearing members for forming toner images, a plurality of driven members respectively acting on the plurality of image bearing members, wherein, the plurality of image bearing members including plural first image bearing members and a second image bearing member which is different from the plural first image bearing members. In a first mode, the toner image is formed on each of the plural first image bearing members and the second image bearing member. In a second mode, the toner image is not formed on the plural first image bearing members and the toner image is formed on the second image bearing member, a first drive device which drives the plural first image bearing members, and a second drive device which drives the second image bearing member, the driven member which acts on the second image bearing member and at least one of the driven members which act on the plural first image bearing members. Such an image forming apparatus is capable of suppressing an image misalignment among the image bearing members with a reduced cost, and capable of equalizing the drive loads for the plurality of drive sources.

REFERENCES:
patent: 6795671 (2004-09-01), Matsuoka
patent: 6889022 (2005-05-01), Ehara et al.
patent: 7031642 (2006-04-01), Abe
patent: 7239829 (2007-07-01), Tanaka
patent: 2003-43781 (2003-02-01), None
patent: 2003-208024 (2003-07-01), None
patent: 2004-205688 (2004-07-01), None
patent: 2005-265951 (2005-09-01), None

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