Patent ID: 6032003
Filing Date: 2000-02-29
Classification: G03G

Abstract:
A monocomponent type developing apparatus comprising:a movable toner support member for holding and conveying charged toner;a movable electrostatic latent image support member disposed in contact with the toner support member, for holding an electrostatic latent image to be developed with the charged toner conveyed from the toner support member;a developing bias source for applying a predetermined developing bias voltage to the toner support member;a switching element for selectively switching on and off an electrical connection between the toner support member and the developing bias source;a protective resistance connected to the switching element;a controller for switching on the switching element in the case of applying the developing bias voltage to the toner support member, and for switching off the switching element in the case of keeping the toner support member in an electrically floating state without applying the developing bias voltage; andbias stabilizing means interposed between the toner support member and a ground, for stabilizing the developing bias voltage when the switching element is on.