US 2019/0317424 A1Published application

Developing device

AssigneeCanon Kabushiki Kaisha

InventorShunichi Koga

Life of this patent

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Abstract

A developing device includes an accommodating member, a developer carrying member, a feeding screw provided with a helical blade, a bearing portion, and a guiding portion including an inclined surface. With respect to the developer feeding direction, a position of an edge of a receiving port of the accommodating member on a bearing portion side is closer to the bearing portion than a mostupstream end of the blade with respect to the developer feeding direction is. With respect to the developer feeding direction, a position of a downstream end portion of the inclined surface is remoter from the bearing portion than the mostupstream end of the blade with respect to the developer feeding direction is.

Claims12

Dependent claims

A developing device comprising:

an accommodating member provided with a receiving port through which a developer is received and capable of accommodating the developer;
a developer carrying member supported by said accommodating member and configured to carry and feed the developer;
a feeding screw capable of feeding the developer supplied through said receiving port, wherein said feeding screw is provided below said receiving port in a vertical direction and is provided with a rotation shaft and a helical blade formed around said rotation shaft;
a bearing portion configured to support said feeding crew on a side upstream of said feeding screw with respect to a developer feeding direction;
and
a guiding portion including an inclined surface which is inclined downward in the vertical direction from an upstream side toward a downstream side thereof with respect to the developer feeding direction and which is configured to guide, toward said feeding screw, the developer received through said receiving port,
wherein with respect to the developer feeding direction, a position of an edge of said receiving port on a bearing portion side is closer to said bearing portion than a mostupstream end of said blade with respect to the developer feeding direction is, and
wherein with respect to the developer feeding direction, a position of a downstream end portion of said inclined surface is remoter from said bearing portion then the mostupstream end of said blade with respect to the developer feeding direction is.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/385,102Filed 16 Apr 2019
Priority: JP 2018-07940617 Apr 2018
Published: 17 Oct 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

G03G 15/0813
On a donor element, e.g. belt, roller: characterised by means in the developing zone having an interaction with the image carrying member, e.g.…
G03G 15/0808
On a donor element, e.g. belt, roller: characterised by the developer supplying means, e.g. structure of developer supply roller
G03G 15/0822
Using a solid developer, e.g. powder developer: arrangements for preparing, mixing, supplying or dispensing developer
G03G 15/0877
Arrangements for preparing, mixing, supplying or dispensing developer: arrangements for metering and dispensing developer from a developer…

Family

US 10,698,341 B2Related patent
US 2019/0317424 A1This patent

From the US filing history. Foreign family members aren’t listed.

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