Developing apparatus for image forming apparatus

摘要

A developing apparatus which uses a two-component developer consisting of a toner and carrier. The ratio between the amount of the developer M 1 which is drawn onto a developing sleeve and refluxes while being regulated by a doctor blade, and the amount of the developer (drawn amount) M 2 which passes through the doctor blade is M 1 /M 2 <10. The toner is a negatively-charged toner. In a charge amount distribution the number of toners of -1 fc/10 mum or more is 20% or less of the total number of toners.