IMAGE FORMING APPARATUS

摘要

A controller for an image forming apparatus includes a difference calculating portion for calculating a difference between a consumption value depending on an amount of the toner consumed every predetermined unit and a reference value; and a difference integrating portion. When an integrated value of the difference is larger than a predetermined threshold, the controller executes an operation in a forced consumption mode so that the toner is consumed in an amount corresponding to a predetermined value obtained by multiplying the predetermined threshold by a coefficient of less than 1. When the operation is executed, the integrating portion sets, at a reset value, a value obtained by subtracting the predetermined value from the integrated value at that time. After the operation is executed, the controller executes the operation every time when an integrated value obtained by integrating the reset value and the difference is larger than the predetermined threshold.

主权项

1. An image forming apparatus comprising:
an image bearing member; a developing device for developing an electrostatic latent image, formed on said image bearing member, with a toner; a supplying device for supplying the toner to said developing device depending on a consumption amount of a developer; and a controller capable of executing an operation in a forced consumption mode in which the toner is forcedly consumed by said developing device, wherein said controller includes: a difference calculating portion for calculating a difference between a consumption value depending on an amount of the toner consumed every predetermined unit of image formation and a reference value set for the predetermined unit; and an integrating portion for integrating the difference to obtain an integrated value, wherein when the integrated value is larger than a predetermined threshold, said controller executes the operation in the forced consumption mode so that the toner is consumed in an amount corresponding to a value obtained by multiplying the predetermined threshold by a coefficient of less than 1, wherein when the operation in the forced consumption mode is executed, said integrating portion sets, at a reset value, a value obtained by subtracting the value, obtained by multiplying the predetermined threshold by the coefficient, from the integrated value at the time when the operation is executed, and wherein after the operation in the forced consumption mode is executed, said controller executes the operation in the forced consumption mode every time when an integrated value obtained by integrating the reset value and the difference is larger than the predetermined threshold.