Patent ID: 11914312
Assignee: KYOCERA DOCUMENT SOLUTIONS INC.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 3:
4. The developing device according to claim 2, wherein
a relationship among
an absolute value of the local minimum value C of the vertical magnetic force gradient at the point P,
an absolute value of a local maximum value B of the vertical magnetic force gradient present between the downstream-side surface of the regulation member and the point P with respect to the rotation direction of the developing sleeve,
an absolute value of a local maximum value E of the vertical magnetic force gradient present between the point P and a peak of the vertical magnetic force of the downstream-side magnetic pole, and
an absolute value of the vertical magnetic force gradient D at a position at which the vertical magnetic force is 0 [mT]

fulfills the expression (1) below:

|C|≤|D|<|B}<|E|  (1)