DEVELOPING DEVICE
First Claim
1. A developing device comprising:
- a developer carrying member for carrying a developer comprising a toner and a carrier;
a circulation path along which the developer to be supplied to said developer carrying member is circulated while being stirred;
carrier supplying means for supplying at least the carrier to said circulation path;
a discharge opening, provided in said circulation path, through which a part of the circulated developer is to be overflowed and discharged; and
a feeding member comprising a rotation shaft rotatably provided in said circulation path so as to oppose said discharge opening and a blade portion including a portion helically formed around the rotation shaft,wherein an outer diameter of the blade portion formed in a first region including at least a portion opposing said discharge opening is smaller than that in a second region adjacent to the first region with respect to a direction of the rotation shaft, andwherein a smaller average angle formed between the rotation shaft and a developer feeding surface of the blade portion in the first region is smaller than that in the second region.
1 Assignment
0 Petitions
Accused Products
Abstract
A developing device includes a developer carrying member for carrying a developer; a circulation path along which the developer is circulated; a carrier supplying portion; a discharge opening, provided in the circulation path, through which a portion of the developer is to be overflowed and discharged; and a feeding member comprising a rotation shaft and a blade portion including a helical portion. An outer diameter of the blade portion formed in a first region including at least a portion opposing the discharge opening is smaller than that in a second region adjacent to the first region with respect to a rotation shaft direction. A smaller average angle formed between the rotation shaft and a developer feeding surface of the blade portion in the first region is smaller than that in the second region.
21 Citations
10 Claims
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1. A developing device comprising:
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a developer carrying member for carrying a developer comprising a toner and a carrier; a circulation path along which the developer to be supplied to said developer carrying member is circulated while being stirred; carrier supplying means for supplying at least the carrier to said circulation path; a discharge opening, provided in said circulation path, through which a part of the circulated developer is to be overflowed and discharged; and a feeding member comprising a rotation shaft rotatably provided in said circulation path so as to oppose said discharge opening and a blade portion including a portion helically formed around the rotation shaft, wherein an outer diameter of the blade portion formed in a first region including at least a portion opposing said discharge opening is smaller than that in a second region adjacent to the first region with respect to a direction of the rotation shaft, and wherein a smaller average angle formed between the rotation shaft and a developer feeding surface of the blade portion in the first region is smaller than that in the second region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification