# US 2021/0240099 A1 · Developing cartridge

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- Number: US 2021/0240099 A1
- Document ID: US20210240099A1
- Status: Published application
- Kind: A1
- Application number: 17/235,014
- Filed: 2021-04-20
- Published: 2021-08-05
- Earliest claimed: 2019-03-26
- Assignees: Brother Kogyo Kabushiki Kaisha
- Applicants: Brother Kogyo Kabushiki Kaisha
- Inventors: Nao ITABASHI
- Web page: https://patentgrep.com/patent/US20210240099A1

## CPC

- G03G 15/065: {Arrangements for controlling the potential of the developing electrode}
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY

## Abstract

A developing cartridge 1 may include a developing roller including a developing roller shaft, a casing capable of containing a developer material, and a developing electrode or a member configure to be electrically connected to the developing roller shaft. The developing electrode or the member has a first end portion configured to be electrically connected to the developing roller shaft and a second end portion located farther away from the developing roller shaft than the first end portion. The second end portion is farther away in the second direction from the one end of the casing than the first end portion is from the one end of the casing. The developing electrode has a first hole extending in the second direction between the first end portion and the second end portion.

## Claims

### Claim 1

A cartridge comprising:
a drum frame including a photosensitive drum;
a casing capable of containing a developer material, the casing including:
a developing roller including a developing roller shaft extending in a first direction; and
a developing electrode electrically connected to the developing roller shaft, the developing electrode having a hole passes completely through the developing electrode, and
a pressing surface being inserted to the hole, the pressing surface presses an inner surface of the hole, the pressing surface configured to move a pressed position in a state where the developing roller presses the photosensitive drum and a separate position in a state where the developing roller separates from the photosensitive drum.

### Claim 2 (depends on 1)

The cartridge according to claim 1, wherein the pressing surface is movable relative to the drum frame.

### Claim 3 (depends on 1)

The cartridge according to claim 1, further comprising:
a developing cartridge including the casing, and
a drum cartridge including the drum frame and the pressing surface.

### Claim 4 (depends on 1)

The cartridge according to claim 1, wherein the developing electrode is made of a conductive resin.