Method for controlling supply quantity of developer

Abstract

Abstract PURPOSE:To use a reference reflecting plate and a light quantity sensor to control the supply quantity of a developer by using the reference reflecting plate and the light quantity sensor to detect the image density of an original and forecasting developer consumption in accordance with the image density to supply the quantity of developer corresponding to this developer consumption. CONSTITUTION:A reference reflecting plate 3 is provided and a light quantity sensor 11 is arranged just behind a lens 9, and a reference quantity of light is obtained in accordance with the quantity of reflected light from the reference reflecting plate 3 and is compared with the quantity of reflected light from an original surface to detect the image density of an original 2, and the quantity of the developer corresponding to the image density is supplied into a developing machine 15, thus controlling the supply quantity of the developer. That is, the developer consumption is forecasted in accordance with the image density of the original 2, and the quantity of the developer corresponding to this consumption is supplied. The operation of a developer supply device motor 16 is controlled by a power source 14 to supply the developer to the developing machine. Outputs of said reference reflecting plate 3 and the light quantity sensor 11 which detects the quantity of reflected light from the original surface are given as data to a CPU 13 through an A/D converter 12 of a control system.

Inventors

• 👤 Koji Aikawa
• 👤 相川　幸二
• 👤 Katsuhiko Ono
• 👤 勝彦 小野
• 👤 Yoshikazu Okamoto
• 👤 佳和 岡本
• 👤 Tamotsu Sakamoto
• 👤 保 坂本

Bibliographic Details