# US 2018/0024463 A1 · Developing system and image forming apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0024463 A1 - Document ID: US20180024463A1 - Status: Published application - Kind: A1 - Application number: 15/427,543 - Filed: 2017-02-08 - Published: 2018-01-25 - Earliest claimed: 2016-07-25 - Assignees: Fuji Xerox Co., Ltd. - Applicants: Fuji Xerox Co., Ltd. - Inventors: Nao KATO; Masayuki SHIMODA - Web page: https://patentgrep.com/patent/US20180024463A1 ## CPC - G03G 15/0865: {Arrangements for supplying new developer} - G03G 15/0879: {for dispensing developer from a developer cartridge not directly attached to the development unit} - G03G 15/0921: {Details concerning the magnetic brush roller structure, e.g. magnet configuration} - G03G 15/087: {Developer cartridges having a longitudinal rotational axis, around which at least one part is rotated when mounting or using the cartridge} - G03G 15/0893: {in a closed loop within the sump of the developing device} - G03G 2215/0852: reciprocating - G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY ## Abstract Provided is a developing system including a developing device that includes a replenishing unit that replenishes toner into an accommodating portion of a developer including toner and a carrier, via a replenishing port, a receiving unit that includes a transport member that transports received toner to a discharge port, a connecting member that has an internal space that is formed with an inlet connected with the discharge port and an outlet connected with the replenishing port, and a rotating member that is rotated in the internal space, and includes a blocking surface portion that closes the inlet and the outlet while passing over the inlet and the outlet, and a transport surface portion that receives or discharges the toner while passing over the inlet and the outlet. ## Claims ### Claim 1 A developing system comprising: a developing device that includes a replenishing unit that replenishes toner into an accommodating portion of a developer including toner and a carrier, via a replenishing port; a receiving unit that includes a transport member that transports received toner to a discharge port; a connecting member that has an internal space that is formed with an inlet connected with the discharge port and as outlet connected with the replenishing port; and a rotating member that is rotated in the internal space, and includes a blocking surface portion that closes the inlet and the outlet while passing over the inlet and the outlet, and a transport surface portion that receives or discharges the toner while passing over the inlet and the outlet. ### Claim 2 (depends on 1) The developing system according to claim 1, wherein the rotating member has a timing at which the blocking surface portion simultaneously closes the inlet and the outlet. ### Claim 3 (depends on 1) The developing system according to claim 1, wherein the receiving unit is provided at a position deviated from the replenishing unit of the developing device in a horizontal direction. ### Claim 4 (depends on 2) The developing system according to claim 2, wherein the receiving unit is provided at a position deviated from the replenishing unit of the developing device in a horizontal direction. ### Claim 5 (depends on 1) The developing system according to claim 1, wherein the replenishing unit of the developing device is rotatable provided at a portion between the replenishing port and the accommodating portion in a state where an outer circumferential surface of the replenishing unit faces the replenishing port with interposing a gap, has a magnetic force generating region that generates a magnetic force above an upper surface of the developer in the accommodating portion, and includes a rotating body that transports the developer in the accommodating portion with holding the developer on the outer circumferential surface by the magnetic force of the magnetic force generating region when the upper surface of the developer exceeds a predetermined reference height, and closes a gap with the replenishing port by the held developer. ### Claim 6 (depends on 2) The developing system according to claim 2, wherein the replenishing unit of the developing device is rotatably provided at a portion between the replenishing port and the accommodating portion in a state where an outer circumferential surface of the replenishing unit faces the replenishing port with interposing a gap, has a magnetic force generating region that generates a magnetic force above an upper surface of the developer in the accommodating portion, and includes a rotating body that transports the developer in the accommodating portion with holding the developer on the outer circumferential surface by the magnetic force of the magnetic force generating region when the upper surface of the developer exceeds a predetermined reference height, and closes a gap with the replenishing port by the held developer. ### Claim 7 (depends on 3) The developing system according to claim 3, wherein the replenishing unit of the developing device is rotatably provided at a portion between the replenishing port and the accommodating portion in a state where an outer circumferential surface of the replenishing unit faces the replenishing port with interposing a gap, has a magnetic force generating region that generates a magnetic force above an upper surface of the developer in the accommodating portion, and includes a rotating body that transports the developer in the accommodating portion with holding the developer on the outer circumferential surface by the magnetic force of the magnetic force generating region when the upper surface of the developer exceeds a predetermined reference height, and closes a gap with the replenishing port by the held developer. ### Claim 8 (depends on 4) The developing system according to claim 4, wherein the replenishing unit of the developing device is rotatably provided at a portion between the replenishing port and the accommodating portion in a state where an outer circumferential surface of the replenishing unit faces the replenishing port with interposing a gap, has a magnetic force generating region that generates a magnetic force above an upper surface of the developer in the accommodating portion, and includes a rotating body that transports the developer in the accommodating portion with holding the developer on the outer circumferential surface by the magnetic force of the magnetic force generating region when the upper surface of the developer exceeds a predetermined reference height, and closes a gap with the replenishing port by the held developer. ### Claim 9 (depends on 1) An image forming apparatus comprising: an image carrier on which an electrostatic latent image is formed; and the developing system according to claim 1 that develops the electrostatic latent image on the image carrier. ### Claim 10 (depends on 2) An image forming apparatus comprising: an image carrier on which an electrostatic latent image is formed; and the developing system according to claim 2 that develops the electrostatic latent image on the image carrier. ### Claim 11 (depends on 3) An image forming apparatus comprising: an image carrier on which an electrostatic latent image is formed; and the developing system according to claim 3 that develops the electrostatic latent image on the image carrier. ### Claim 12 (depends on 4) An image forming apparatus comprising: an image carrier on which an electrostatic latent image is formed; and the developing system according to claim 4 that develops the electrostatic latent image on the image carrier. ### Claim 13 (depends on 5) An image forming apparatus comprising: an image carrier on which an electrostatic latent image is formed; and the developing system according to claim 5 that develops the electrostatic latent image on the image carrier. ### Claim 14 (depends on 6) An image forming apparatus comprising: an image carrier on which an electrostatic latent image is formed; and the developing system according to claim 6 that develops the electrostatic latent image on the image carrier. ### Claim 15 (depends on 7) An image for apparatus comprising: an image carrier on which an electrostatic latent image is formed; and the developing system according to claim 7 that develops the electrostatic latent image on the image carrier. ### Claim 16 (depends on 8) An image forming apparatus comprising: an image carrier on which an electrostatic latent image is formed; and the developing system according to claim 8 that develops the electrostatic latent image on the image carrier.