DEVELOPING APPARATUS
First Claim
1. A developing apparatus comprising:
- a developing container storing two-component developer containing nonmagnetic toner and magnetic carrier;
a rotatable developer bearing member configured to bear the developer;
a magnet provided in the developer bearing member and having a first magnetic pole and a second magnetic pole of the same polarity as the first magnetic pole, the second magnetic pole being adjacent to and downstream of the first magnetic pole in a rotation direction of the developer bearing member; and
a wall portion disposed to face the developer bearing member in an area downstream side of the first magnetic pole and upstream side of the second magnetic pole in the rotation direction of the developer bearing member and configured such that gaps between the wall portion and respective end portions of a developer bearing area which bears the developer on the developer bearing member in a rotation axis direction of the developer bearing member are smaller than a gap between the wall portion and a center portion of the developer bearing area.
1 Assignment
0 Petitions
Accused Products
Abstract
A developing apparatus includes a developing container, a rotatable developer bearing member, a magnet, and, a wall portion. The magnet is provided in the developer bearing member and has a first magnetic pole and a second magnetic pole of the same polarity as the first magnetic pole. The second magnetic pole is adjacent to and downstream of the first magnetic pole in a rotation direction of the developer bearing member. The wall portion is disposed to face the developer bearing member in an area downstream the first magnetic pole and upstream the second magnetic pole in the rotation direction and is configured such that gaps between the wall portion and respective end portions of a developer bearing area in a rotation axis direction of the developer bearing member are smaller than a gap between the wall portion and a center portion of the developer bearing area.
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Citations
9 Claims
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1. A developing apparatus comprising:
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a developing container storing two-component developer containing nonmagnetic toner and magnetic carrier; a rotatable developer bearing member configured to bear the developer; a magnet provided in the developer bearing member and having a first magnetic pole and a second magnetic pole of the same polarity as the first magnetic pole, the second magnetic pole being adjacent to and downstream of the first magnetic pole in a rotation direction of the developer bearing member; and a wall portion disposed to face the developer bearing member in an area downstream side of the first magnetic pole and upstream side of the second magnetic pole in the rotation direction of the developer bearing member and configured such that gaps between the wall portion and respective end portions of a developer bearing area which bears the developer on the developer bearing member in a rotation axis direction of the developer bearing member are smaller than a gap between the wall portion and a center portion of the developer bearing area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification