Patent ID: 7751730
Filing Date: 2010-07-06
Classification: G03G

Abstract:
1. A developing device comprising: a developer conveying device configured to convey a developer containing a toner and a carrier; and a developer holding unit configured to convey the developer conveyed by the developer conveying device to an area facing a latent-image holding unit in accordance with its own surface movement by holding the developer on its own endlessly-moving surface, and develop a latent image held by the latent-image holding unit, wherein the developer conveying device includes: an average of maximum amounts of a pressing force on the developer, which is conveyed inside the developer conveying unit by the agitation conveying member, by each one rotation of the agitation conveying member with respect to the toner-concentration detecting unit or an average of maximum amounts of a pressing force on the developer by each one rotation of the agitation conveying member with respect to a portion of the wall facing the toner-concentration detecting unit is set within a range of 9.8×15 [N/m