Patent ID: 9354545
Filing Date: 2016-05-31
CPC Classification: G03G

Claim Text:
1. A developing apparatus for developing an electrostatic latent image formed on a surface of an electrostatic latent image bearing member to form a toner image on the surface of the electrostatic latent image bearing member, the developing apparatus comprising: a toner for developing the electrostatic latent image; a toner carrier for carrying the toner; and a regulating member for regulating a layer thickness of the toner carried by the toner carrier, wherein: the toner comprises a toner containing the toner has a dielectric loss factor (∈″) at a frequency of 100 kHz and a temperature of 30° C. of 0.03 pF/m or more and 0.30 pF/m or less; the toner carrier includes the urethane resin has a partial structure derived from a reaction between in the structural formula (1): n represents an integer of 1 or more and 4 or less; R (a) a hydroxyalkyl group having 2 or more and 8 or less carbon atoms, (b) an aminoalkyl group having 2 or more and 8 or less carbon atoms, and (c) a group represented by the following structural formula (2); and R in the structural formula (2): m in 2 or 3; and R