公开(公告)号：US11016415B1

公开(公告)日：2021-05-25

申请号：US17049557

申请日：2019-02-25

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Hojin Jang ,  Seil Kwon ,  DaeHo Kim ,  Jong-Hyun Park ,  Jong-Hwa Park

IPC: G03G15/08

Abstract: A development cartridge includes a developer housing to receive a developer. The developer housing includes a developing chamber to have a developing roller in the developing chamber and extending in a longitudinal direction of the developing roller, an agitating chamber located parallel to the developing chamber, and a partition wall to separate the developing chamber from the agitating chamber, the partition wall having a first communication hole and a second communication hole respectively formed at both end portions of the partition wall in the longitudinal direction, through which the developing chamber and the agitating chamber are to communicate through. A developer inlet, through which the developer is injectable into the developer housing, for the developer housing to receive the developer, is formed in the developer housing at a position corresponding to the first communication hole or the second communication hole. The developer inlet is closeable with a cap.

公开(公告)号：US11774877B2

公开(公告)日：2023-10-03

申请号：US17792779

申请日：2020-11-20

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Jonghyun Park ,  Seil Kwon ,  Jeonghyun Lee

IPC: G03G15/10 ,  G03G15/08

CPC classification number: G03G15/0856

Abstract: A developer cartridge includes a housing to accommodate a developer and including a developer outlet, and a sensing portion that forms a sensing area to detect whether or not the developer inside the housing is miming out. The sensing portion is recessed into a portion of a lower wall of the housing accordingly having a thickness less than a thickness of a remaining portion of the lower wall.

公开(公告)号：US11112724B2

公开(公告)日：2021-09-07

申请号：US16982901

申请日：2018-07-27

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Jong Hyun Park ,  Myung Kook Ahn ,  Seil Kwon

IPC: G03G15/08

Abstract: A printer including a body, a developer cartridge, and a developer level sensor. The body includes a printing unit to print an image on a print medium based on electrophotography. The developer cartridge is attachable to the body and includes a developer container including a developer, and a developer outlet provided at a length-direction side of the developer container to supply the developer from the developer container to the printing unit. The developer level sensor is installed on the body near the developer outlet to generate an electrical detection signal based on a developer level in the developer container.