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    • 38. 发明专利
    • NON-MAGNETIC SINGLE COMPONENT DEVELOPING DEVICE
    • JPH1039631A
    • 1998-02-13
    • JP19190496
    • 1996-07-22
    • MATSUSHITA ELECTRIC IND CO LTD
    • SHIMAZAKI HIROMITSUTAGUCHI HIROCHIKANODA KAZUHIKOTSURU TETSUHIRO
    • G03G15/08
    • PROBLEM TO BE SOLVED: To provide the uniform printed images, and to prevent the increase of the torque of a toner supplying roller, a developing roller or the like, by installing a toner recovering member for recovering the toner remained on the developing roller. SOLUTION: A toner recovering member 30 which is kept into contact with a developing roller 9 on a flat face for recovering the toner remained on the developing roller after the development, and a toner recovering member bias power source 31 connected with the toner recovering member 30 for applying the bias voltage to the same 30, are installed. The bias voltage higher than an absolute value of the bias voltage of the developing bias power supply 11, is applied to the toner recovering member 30 by the toner recovering member bias power source 31. The increase of the charging amount of the toner on the developing roller can be prevented by the toner recovering member 30. Further the bias voltage is not applied to a toner supplying roller 10, so that the increase of the torque of the developing roller 9, the toner supplying roller 11 or the like, and the dispersion of the density of the printed image caused by the change of the environment, can be prevented.