US 11,693,335 B2Granted

Development cartridge

AssigneeCanon Kabushiki Kaisha

InventorsTakuya Oka, Issei Imamura, Ryohei Tsutsumi, Keitaro Nakata

Life of this patent

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Abstract

A cartridge mountable in an apparatus main body of an image forming apparatus, the cartridge includes a development roller, a frame member including a development chamber, a developer containing chamber, and a first opening portion, the developer containing chamber including an inner wall and a second opening portion, a stirring member including a stirring shaft and a sheet, and a conveyance member driven in such a manner that the developer is replenished into the developer containing chamber through the second opening portion, wherein the sheet is rotated in contact with the inner wall in such a manner that, after the sheet is elastically deformed by contact with a portion of the inner wall, at least a part of the elastic deformation is restored, and wherein the conveyance member is being driven at a timing when the sheet passes through the front side.

Claims8

Dependent claims

A cartridge comprising:

a development roller configured to bear a developer on the development roller;
a frame member including a developer containing chamber containing the developer, wherein the developer containing chamber includes an inner wall which constitutes the developer containing chamber and is provided with an inlet port through which the developer is replenished from an outside of the cartridge into the developer containing chamber;
a stirring member configured to rotate about a rotational axis of the stirring member and configured to stir the developer contained in the developer containing chamber, wherein the stirring member includes a stirring shaft and a sheet attached to the stirring shaft so as to rotate together with the stirring shaft, and wherein the sheet of the stirring member is configured to rotate in contact with the inner wall of the developer containing chamber so as to block the inlet port at a predetermined timing;
and
a conveyance member which is provided outside of the developer containing chamber and which is configured to rotate so as to convey the developer into the developer containing chamber through the inlet port,
wherein the conveyance member is configured to rotate at the predetermined timing.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/685,198Filed 2 Mar 2022 · continuation
Priority: JP 2020-09501829 May 2020
Published: US 2022/0187739 A116 Jun 2022
Granted: 4 Jul 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

G03G 15/0889
Arrangements for conveying and conditioning developer in the developing unit, e.g. agitating, removing impurities or humidity: for agitation or…
G03G 15/0877
Arrangements for preparing, mixing, supplying or dispensing developer: arrangements for metering and dispensing developer from a developer…
G03G 21/14
Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge: electronic sequencing control
G03G 21/1647
For connecting the different parts of the apparatus: mechanical connection means

Family

Application17/327,525Parent of this continuation · filed 21 May 2021
US 2022/0187739 A1Pre-grant publication · published 16 Jun 2022
US 11,300,900 B2Parent of this continuation
US 2021/0373462 A1Published application
US 11,693,335 B2This patent

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