Toner replenishment controlling method

Abstract

Abstract PURPOSE:To stabilize the density of a copy which is copied continuously and has plenty of toner adhering quantities by controlling toner replenishment based on a measured value of density of a reference density piece formed on an electrostatic image forming body, and also executing auxiliary control based on original density information. CONSTITUTION:Preliminary scanning of an original is executed together with a copying start, picture quantity information is read and added by a sensor 43, and thereafter, a toner replenishing quantity is calculated. In this case, unless a toner replenishment stop signal is outputted from a control system by an image of a reference density piece 11, a toner is replenished by this calculating result, and a copying process is advanced. When the copying process is advanced and the reference density piece image comes to a density detector 16, a toner replenishment control process is started. That is to say, if the reference density piece density is lower than the lower limit value, the toner of a prescribed quantity is replenished immediately, and if the reference density piece density is higher than the lower limit value, no replenishment is executed. In this way, the density of a copy which is copied continuously and has plenty of toner adhering quantities is stabilized within a correct range.

Inventors

• 👤 Tadao Kishimoto
• 👤 岸本　忠雄
• 👤 Takami Souma
• 👤 宇民 相馬

Bibliographic Details