Title:
現像装置
Document Type and Number:
Japanese Patent JP7043270
Kind Code:
B2
Abstract:
To provide a developing device with which it is possible to improve the performance of stirring a developer without lowering the performance of conveying a developer as much as possible.SOLUTION: A stirring screw 32 is composed of a multi-row screw, and a stirring rib 77 protruding in the radial direction is provided between its spiral blades 74a, 74b. The stirring rib 77 is not in contact with a spiral blade 74 on the upstream side of a conveyance direction, and is in contact with the spiral blade 74 on the downstream side of the conveyance direction. When the stirring rib 77 is in contact with a conveyance reverse side 76 of the spiral blade 74 on the downstream side of the conveyance direction, the performing of stirring a developer is improved as compared with the case where it is not in contact with the conveyance reverse side 76. Whereas, since the stirring rib 77 is not in contact with a conveyance surface 75 of the spiral blade 74 on the upstream side of the conveyance direction, the performance of conveying a developer on the conveyance surface 75 is hardly impeded as compared with the case where it is in contact with the conveyance surface 75. Thus, it is possible to easily improve the performance of stirring a developer without lowering the performance of conveying a developer as much as possible.SELECTED DRAWING: Figure 4
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Inventors:
Kohei Mishima
Kanai Dai
Kanai Dai
Application Number:
JP2018009113A
Publication Date:
March 29, 2022
Filing Date:
January 23, 2018
Export Citation:
Assignee:
Canon Inc
International Classes:
G03G15/08
Domestic Patent References:
| JP2019045798A | ||||
| JP2004151354A | ||||
| JP2004233597A | ||||
| JP4204877A | ||||
| JP2006098540A |
Foreign References:
| US20120076544 |
Attorney, Agent or Firm:
Chikajima International Patent Office