# US 11,307,511 B2 · Developing cartridge having electrode > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,307,511 B2 - Document ID: US11307511B2 - Status: Granted - Kind: B2 - Application number: 17/038,310 - Filed: 2020-09-30 - Published: 2021-01-14 - Granted: 2022-04-19 - Earliest claimed: 2012-07-09 - Assignees: Brother Kogyo Kabushiki Kaisha - Applicants: Brother Kogyo Kabushiki Kaisha - Inventors: Yasumasa Fujii - Web page: https://patentgrep.com/patent/US11307511B2 ## CPC - G03G 15/065: {Arrangements for controlling the potential of the developing electrode} - G03G 15/0806: {on a donor element, e.g. belt, roller (complete developer unit G03G15/0896)} - G03G 15/0808: {characterised by the developer supplying means, e.g. structure of developer supply roller} - G03G 15/0855: {the concentration being measured by optical means} - G03G 15/0865: {Arrangements for supplying new developer} - G03G 21/1652: {Electrical connection means} - G03G 21/1676: {for the developer unit} - G03G 2221/166: Electrical connectors - G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY ## Abstract A developing cartridge includes a casing, a developer-carrying member, a supply member, a developing electrode, a supply electrode, and an insulating member. The casing is configured to accommodate therein developer. The developer-carrying member is configured to rotate about a rotational axis and carry the developer thereon. The supply member is configured to supply the developer to the developer-carrying member. The developing electrode is configured to be electrically connected to the developer-carrying member. The supply electrode is configured to be electrically connected to the supply member. The insulating member insulates the developing electrode and the supply electrode with each other. The developing electrode, the insulating member, and the supply electrode are overlapped in this order in an axial direction of the rotational axis. ## Claims ### Claim 1 A developing cartridge comprising: a developing roller rotatable about a first axis extending in a first direction; a supply roller rotatable about a second axis extending in the first direction; a housing configured to accommodate developer therein; a developing electrode electrically connected to the developing roller, the developing electrode being made of conductive resin material, the developing electrode including a developing contact part; a supply electrode electrically connected to the supply roller, the supply electrode being made of conductive resin material, the supply electrode including a supply contact part; and a plate positioned between the developing contact part and the supply contact part. ### Claim 2 (depends on 1) The developing cartridge according to claim 1, wherein the developing roller includes a developing roller shaft, and wherein the developing electrode is electrically connected to the developing roller shaft. ### Claim 3 (depends on 2) The developing cartridge according to claim 2, wherein the developing roller shaft is inserted through the developing electrode. ### Claim 4 (depends on 1) The developing cartridge according to claim 1, wherein the developing contact part extends in the first direction. ### Claim 5 (depends on 1) The developing cartridge according to claim 1, wherein the supply roller includes a supply roller shaft, and wherein the supply electrode is electrically connected to the supply roller shaft. ### Claim 6 (depends on 5) The developing cartridge according to claim 5, wherein the supply roller shaft is inserted through the supply electrode. ### Claim 7 (depends on 1) The developing cartridge according to claim 1, wherein the supply contact part extends in the first direction. ### Claim 8 (depends on 1) The developing cartridge according to claim 1, wherein the developing contact part is positioned closer to the supply contact part than the developing roller is to the supply contact part. ### Claim 9 (depends on 1) The developing cartridge according to claim 1, wherein the housing has a first outer surface and a second outer surface spaced apart from the first outer surface in the first direction, wherein the developing contact part is positioned at the first outer surface, wherein the supply contact part is positioned at the first outer surface, and wherein the plate is positioned at the first outer surface. ### Claim 10 (depends on 1) The developing cartridge according to claim 1, wherein the plate extends in the first direction. ### Claim 11 (depends on 1) The developing cartridge according to claim 1, wherein the plate is made of insulating material. ### Claim 12 (depends on 1) The developing cartridge according to claim 1, wherein the plate is positioned between the developing contact part and the supply contact part in a second direction crossing the first direction. ### Claim 13 (depends on 1) The developing cartridge according to claim 1, wherein the plate contacts the developing contact part. ### Claim 14 (depends on 1) The developing cartridge according to claim 1, wherein the plate contacts the supply contact part. ### Claim 15 (depends on 1) The developing cartridge according to claim 1, wherein the developing contact part is contactable with a device-side developing electrode of an image forming apparatus. ### Claim 16 (depends on 15) The developing cartridge according to claim 15, wherein the developing contact part is contactable with the device-side developing electrode of the image forming apparatus in a state where the developing cartridge is attached to the image forming apparatus. ### Claim 17 (depends on 1) The developing cartridge according to claim 1, wherein the supply contact part is contactable with a device-side supply electrode of an image forming apparatus. ### Claim 18 (depends on 17) The developing cartridge according to claim 17, wherein the supply contact part is contactable with the device-side supply electrode of the image forming apparatus in a state where the developing cartridge is attached to the image forming apparatus. ### Claim 19 (depends on 1) The developing cartridge according to claim 1, wherein the developing cartridge is for use with a drum cartridge including a photosensitive drum, and wherein the drum cartridge is attachable to an image forming apparatus. ### Claim 20 (depends on 19) The developing cartridge according to claim 19, wherein the developing roller contacts the photosensitive drum of the drum cartridge in a state where the developing cartridge and the drum cartridge are attached to the image forming apparatus.