Patent ID: 11906910
Assignee: KYOCERA DOCUMENT SOLUTIONS INC.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 1:
2. The developing device according to claim 1,
wherein
the carrier has a carrier core that is a magnetic particle and a resin coat layer that is formed on a surface of the carrier core, and the carrier satisfies formula (2) below:

0.73 [(s/50 g)×(g/cm3)]≤FR×AD/Shape Coefficient≤2.10 [(s/50 g)×(g/cm3)]  (2)

where
FR represents a period of time (s/50 g) taken to discharge 50 grams of the carrier,
AD represents a bulk specific gravity (g/cm3) of the carrier, and, Shape Coefficient equals (Measured Carrier Volume Average Particle Diameter)/(Carrier Particle Diameter Calculated from BET Specific Surface Area).