IMAGE FORMING APPARATUS

摘要

An image forming apparatus, which is capable of suitably preventing a separating discharge phenomenon from occurring at a fixing entrance guide for guiding a recording material to a fixing device, includes a control portion for controlling a transfer bias voltage and a separation bias voltage. A transfer roller transfers a toner image from a surface of a photosensitive drum onto a sheet at a transfer nip portion, and the control portion changes the transfer bias voltage applied to the transfer roller and the separation bias voltage applied to a charge eliminating needle to have larger voltage values before a trailing edge of the sheet, which is conveyed to the transfer nip portion and being subjected to transfer, passes through the transfer nip portion.

主权项

1. An image forming apparatus, comprising:
a transfer unit configured to transfer a toner image on an image bearing member onto a recording material which has been conveyed to a transfer region; a transfer bias voltage applying unit configured to apply a transfer bias voltage to the transfer unit; a separating unit configured to cause the recording material to separate from the image bearing member after the toner image is transferred from the image bearing member onto the recording material; a separation bias voltage applying unit configured to apply a separation bias voltage to the separating unit; and a controlling unit configured to change the transfer bias voltage and the separation bias voltage to have larger voltage values before a trailing edge of the recording material passes through the transfer region.