Developing device of cleaning piece with toning agent agitator and clean light permeable window

Application Number: 00106749
Application Date: 2000.02.24
Publication Number: 1266208
Publication Date: 2000.09.13
Priority Information: 1999/5/31 JP 152722/99; 1999/6/21 JP 174028/99; 1999/2/24 JP 47183/99; 1999/3/9 JP 62235/99; 1999/3/9 JP 62236/99; 1999/3/9 JP 62237/99; 1999/3/9 JP 62238/99
International: G03G15/08;G03G21/00
Applicant(s) Name: Brother Kogyo K. K.
Inventor(s) Name: Sato Shogo;Ishii Masahiro;Hattori Yoshiteru
Patent Agency Code: 72001
Patent Agent: lin changan
Abstract A developing device having a toner container in which a toner agitator and a cleaning member is provided. The toner agitator agitates the toner in the toner container and transport the toner into a developing chamber. The toner container has a pair of light transmission windows through which light passes. If no toner exist between the light transmission windows, the light passes through the two windows to provide a signal indicative of exchange of the developing device with a new device. If toner exists therebetween, light cannot pass through two windows. The cleaning member wipes off the toner from the surface of the windows.