In an image forming apparatus where toner is supplied to a photosensitive member
via a toner supply roller and a developing roller, the toner being charged by the
friction contact between toner supply roller and the developing roller, a regulating
blade is in contact with the developing roller at a point between contact between
the toner supply roller and the developing roller and between the developing roller
and the photosensitive member. The area between the contact between the toner supply
roller and the developing roller and where the layer regulating blade contacts
the developing roller constitutes a first region and the area between the contact
between the regulating blade and the developing roller and the developing roller
and the photosensitive member constitutes a second region. The charge amount per
unit area in the two regions is substantially equal.
