IMAGE FORMING APPARATUS

摘要

Image forming apparatus includes: image forming unit for forming an image on a sheet, and controller for controlling the image forming unit. The controller includes process modules to carry out: counting process for performing counting in accordance with the number of sheets printed by the image forming unit; first bias applying process for setting a developing bias to be applied to the developer carrier to a first bias if a count value in the counting process has not reached a predetermined threshold value; bias changing process for changing the developing bias to a second bias whose absolute value is smaller than that of the first bias if the count value has reached the threshold value; and delaying process for causing an execution timing of the bias changing process to be delayed if the number of sheets printed in a unit of time is not smaller than a reference number.

主权项

1. An image forming apparatus comprising:
an image forming unit configured to form an image on a sheet, the image forming unit including a photoconductor, and a developer carrier configured to carry developer to be supplied to an electrostatic latent image formed on the photoconductor; and a controller configured to control the image forming unit, wherein the controller includes process modules to carry out:
a counting process for performing counting in accordance with the number of sheets printed by the image forming unit;a first bias applying process for setting a developing bias to be applied to the developer carrier to a first bias if a count value in the counting process has not reached a predetermined threshold value;a bias changing process for changing the developing bias to a second bias whose absolute value is smaller than that of the first bias if the count value has reached the threshold value; anda delaying process for causing an execution timing of the bias changing process to be delayed if the number of sheets printed in a unit of time is equal to or greater than a reference number, with respect to an execution timing determined if the number of sheets printed in the unit of time is smaller than the reference number.