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US 6,205,304 B1Granted
Developing apparatus
AssigneeCanon Kabushiki Kaisha
InventorHideshi Kawaguchi
Life of this patent
Estimating the term…
Abstract
The present invention relates to a developing apparatus which has a developer bearing member, a sealing member, a developer scraping portion, and a damming portion disposed on the downstream side of the sealing members and on an upstream side of the developer scraping portion in the carrying direction, and adapted for damming the developer scraped off by the developer scraping portion, and a damming surface of the damming portion is provided so as to intersect with the developer scraping portion.
Claims20
A developing apparatus, comprising:
- a developer bearing member for bearing and carrying a developer to a developing position;
- a sealing member disposed in the vicinity of an end portion of said developer bearing member in a longitudinal direction of said developer bearing member and adapted for preventing the developer from being leaked from the end portion of said developer bearing member;
- a developer regulating member for regulating a thickness of the developer born on said developer bearing member;
- a developer scraping member for scraping the developer off from said developer bearing member by contacting with the end portion of said developer bearing member, wherein said developer scraping member has a developer scraping portion disposed on a downstream side of said sealing member and on an upstream side of the developing position in a carrying direction of the developer by said developer bearing member and said developer scraping portion is disposed so as to be overlapped with said sealing member in the longitudinal direction;
- and
- a damming portion disposed on the downstream side of said sealing member and on an upstream side of said developer scraping portion in the carrying direction, and adapted for damming the developer scraped off by said developer scraping portion, said damming portion being provided so as to be overlapped with said developer scraping portion in the longitudinal direction.
3 more elements
A developing apparatus, comprising:
- a developer bearing member for bearing and carrying a developer to a developing position;
- a sealing member disposed in the vicinity of an end portion of said developer bearing member in a longitudinal direction of said developer bearing member and adapted for preventing the developer from being leaked from the end portion of said developer bearing member;
- a developer scraping portion disposed on a downstream side of said sealing member and on an upstream side of the developing position in a carrying direction of the developer by said developer bearing member, and disposed so as to be overlapped with said sealing member, and adapted for scraping the developer off from said developer bearing member by contacting with said developer bearing member;
- and
- a damming portion disposed on the downstream side of said sealing member and on an upstream side of said developer scraping portion in the carrying direction, and adapted for damming the developer scraped off by said developer scraping portion, a damming surface of said damming portion being provided so as to intersect with said developer scraping portion,
- wherein a thickness of said scraping portion is smaller than a thickness of said damming portion in the carrying direction.
3 more elements
A developing apparatus, comprising:
- a developer bearing member for bearing and carrying a developer to a developing position;
- a sealing member disposed in the vicinity of an end portion of said developer bearing member in a longitudinal direction of said developer bearing member and adapted for preventing the developer from being leaked from the end portion of said developer bearing member;
- a developer scraping portion disposed on a downstream side of said sealing member and on an upstream side of the developing position in a carrying direction of the developer by said developer bearing member, and disposed so as to be overlapped with said sealing member, and adapted for scraping the developer off from said developer bearing member by contacting with said developer bearing member;
- and
- a damming portion disposed on the downstream side of said sealing member and on an upstream side of said developer scraping portion in the carrying direction, and adapted for damming the developer scraped off by said developer scraping portion, a damming surface of said damming portion being provided so as to intersect with said developer scraping portion,
- wherein said damming portion includes an elastic foam.
3 more elements
Dependencies are inferred from the claim text.