image recording device

Abstract

Abstract PURPOSE:To maintain set toner concentration stably for a long period by providing the 1st supply control means which controls the supply of a developer according to the detection result of concentration and the 2nd supply control means which controls the supply of the developer according to the counting result of print dots. CONSTITUTION:The value (j) of a counter which counts the number of times of supply by the 1st supply control means 11 is counted up to calculate the total amount A of supply by the 1st supply control means 11. Then, the initial amount H of toner in a hopper 1 is compared with the total amount A; when H<=A, it is judged that there is no toner and a warning display is made on the display part of an operation part to finish control. When H>A, supply control by the 2nd supply control means 21 is started and the output of ATR 10 is suppressed between an upper-limit and a lower-limit set value and the output Ni of a counter 22 which counts print dots forming an image is read out of an image signal fv of the 1st sheet, so that toner consumption Ti is calculated by a calculating circuit 23. Consequently, output images which are stable for a long period are obtained.

Inventors

• 👤 Kiyoharu Tanaka
• 👤 清春 田中

Bibliographic Details