18919845. DEVELOPING DEVICE (CANON KABUSHIKI KAISHA)
DEVELOPING DEVICE
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DEVELOPING DEVICE
This abstract first appeared for US patent application 18919845 titled 'DEVELOPING DEVICE
Original Abstract Submitted
The developing device includes a first rotatable member, a first magnet, a second rotatable member, and a second magnet. When a position where on a second rotatable member surface, a magnetic flux density of the receiving pole is maximum is a point T, of positions each where the magnetic flux density of the receiving pole is a half value of the maximum, the position on an upstream side is a point Hu, the position, the position on a downstream side is a point Hd, an angle formed by a rectilinear line L connecting a rotation center R of the second rotatable member and the point T and a rectilinear line L connecting the rotation center R and the point Hu is wθ21, and an angle formed by L and a rectilinear line L connecting R and Hd is wθ22, the following relationship is satisfied: wθ22−wθ21≥0.