Patent ID: 7272348
Filing Date: 2007-09-18
Classification: G03G

Abstract:
1. A developing method using a developing device including: a first developer bearing member arranged to be opposed to an image bearing member; a developer layer thickness regulating member for forming a developer layer on the first developer bearing member; and a second developer bearing member arranged on a downstream side of a rotation direction of the image bearing member with respect to the first developer bearing member, the developing method comprising the steps of: causing the first developer bearing member and the second developer bearing member to carry and convey a developer to a developing region where one of the first developer bearing member and the second developer bearing member, and the image bearing member are opposed to each other; and developing a latent image formed on the image bearing member with the developer, wherein: the developing device has a structure in which a developer supplied to a developing region formed by the first developer bearing member and the image bearing member is transported from the first developer bearing member to the second developer bearing member, and the transported developer is supplied to a developing region formed by the second developer bearing member and the image bearing member; the developer comprises a two-component developer having: toner having toner particles each containing at least a binder resin and a colorant; and a magnetic carrier; the developer has a degree of compression C(%) determined from the following equation in a range of 20 to 32%: where A represents an aerated bulk density (g/cm 3 ) and P represents a packed bulk density; (g/cm 3 ), and a shearing stress of the developer obtained by shearing stress measurement under a consolidation load of 4.0×10