Image forming apparatus having misregistration control

摘要

An image forming apparatus includes a plurality of image bearing members and a control unit. After an image forming mode starts until a toner image is primarily transferred onto an intermediate transfer member from an uppermost-stream image bearing member of the plurality of image bearing members provided at an uppermost stream position, the control unit is configured to provide a toner patch onto at least one of primary transfer portions. The toner patch is formed by developing an electrostatic latent image formed on at least one of the plurality of the image bearing members, and in the image forming mode a timing at which a trailing edge of the toner patch that passes through one of the plurality of the primary transfer portions reaches a secondary transfer portion is earlier than a timing at which the recording material reaches the secondary transfer portion.

主权项

1. An image forming apparatus, comprising:
a first image bearing member on which an electrostatic latent image is formed; a first developing device for developing an electrostatic latent image formed on the first image bearing member; a second image bearing member on which an electrostatic latent image is formed; a second developing device for developing an electrostatic latent image formed on the second image bearing member; an intermediate transfer member which is rotatable and is configured to form a first primary transfer portion with the first image bearing member and a second primary transfer portion with the second image bearing member; and a control unit that is configured to execute an image forming mode, wherein in a case where the control unit receives a print signal for transferring a toner image onto a recording material, the control unit controls a timing of forming a toner patch so that the toner patch developed by the second developing device is provided to the second primary transfer portion between a timing when the control unit receives the print signal and a timing when the toner image developed on the first image bearing member is primarily transferred to the intermediate transfer member at the first primary transfer portion.