Patent ID: 9141026
Filing Date: 2015-09-22
Classification: G03G

Abstract:
1. A developing apparatus comprising: a developing roller including a cylindrical sleeve pivotally supported in a freely rotatable manner and a magnet roller equipped with a plurality of magnetic poles fixedly disposed in the sleeve, and configured to carry a two-component developer containing a toner and a carrier on a surface of the sleeve and to convey the developer to a developing region facing a photoreceptor including an electrostatic latent image; a supply roller configured to supply the two-component developer to the surface of the sleeve on an upstream side in a rotational direction of the sleeve from the developing region; a layer thickness adjustment member configured to regulate a layer thickness of the two-component developer carried on the surface of the sleeve, the layer thickness adjustment member including a band-shaped member that extends parallel to or substantially parallel to a rotational axis of the sleeve and over a length equal to or substantially equal to an axial length of the sleeve, one end portion thereof in a width direction being disposed to face the surface of the sleeve at an interval, and a notch open to one end portion side in the width direction being provided at two end portions in a longitudinal direction; and a magnetic seal member made of a magnetic material which is spaced away from and provided opposite to the layer thickness adjustment member with the developing roller provided therebetween.