Image forming apparatus having a controller to control the current flowing between a cleaning member and a collecting member

摘要

An image forming apparatus is provided. The image forming apparatus includes an image carrier, a conveyance belt which conveys a recording sheet via a position opposing the image carrier, a belt cleaner which removes adhered matters on the conveyance belt, a driving unit which drives the image carrier and the conveyance belt, a bias applying unit which applies a cleaning bias to the belt cleaner, and a controller which controls the driving unit and the bias applying unit such that when the image carrier is driven at a first speed, the cleaning bias is applied to the belt cleaner, and when the image carrier is driven at a second speed slower than the first speed, the cleaning bias is not applied to the belt cleaner.

主权项

1. An image forming apparatus comprising:
an image forming part having an image carrier configured to carry a developer image; a conveyance belt configured to convey a recording sheet via a position opposing the image carrier; a cleaning roller configured to contact the conveyance belt to remove adhered matters adhered on the conveyance belt; a collecting member configured to collect adhered matters adhered on the cleaning roller by current flowing between the cleaning roller and the collecting member; and a controller configured to:
start a printing operation in response to receiving a print job after the image forming apparatus is powered on, wherein the printing operation is an operation for forming the developer image on the recording sheet;apply the current between the cleaning roller and the collecting member after the printing operation is started;determine whether the printing job is completed after applying the current between the cleaning roller and the collecting member;determine whether a base time has elapsed after the printing operation is started, the base time beginning from or after the start of the printing operation;in response to determining that the base time has elapsed at or prior to a time at which the printing job is determined to be completed, decrease the current flowing between the cleaning roller and the collecting member;end the printing operation in response to determining that the printing job is completed; andstop applying the current between the cleaning roller and the collecting member without decreasing the current in response to determining that the printing job is completed before the base time has elapsed.