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1. 发明公开

US20240045372A1 IMAGING SYSTEM WITH AIR PASSAGE FOR DEVELOPMENT CHAMBER 审中-公开
公开(公告)号：US20240045372A1
公开(公告)日：2024-02-08
申请号：US17641979
申请日：2020-08-27
申请人： HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
发明人： Tadao MORI , Naoya IWATA , Satoshi MURAMATSU
IPC分类号： G03G21/20 , G03G15/08
CPC分类号： G03G21/206 , G03G15/0812
摘要： An imaging system includes a housing, a developer roller that transfers developer to an image carrier at a development region, a developer regulator to limit a thickness of the developer carried on the developer roller, and an air passage that extends outside a development chamber. The air passage has an inlet to draw an airflow, and an outlet located between the developer regulator and the development region. The air passage has a cross section orthogonal to a direction of the airflow from the inlet to the outlet. In the cross section taken at the narrowest position where the air passage is the narrowest, a width in a width direction parallel to a rotational axis of the developer roller is greater than a thickness that is perpendicular to the width direction.

2. 发明申请

US20230127032A1 INTERNAL PRESSURE CONTROL AND COLLECTION OF SCATTERED DEVELOPER IN DEVELOPING DEVICE 有权
公开(公告)号：US20230127032A1
公开(公告)日：2023-04-27
申请号：US17911734
申请日：2021-02-11
申请人： HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
发明人： Tadao MORI , Naoya IWATA , Takayuki YAMADA
IPC分类号： G03G15/09 , G03G15/08
摘要： A developing device includes a developer roller that is rotatable about an axis, to carry a developer to a development region; a rectifier member extending in a direction parallel to an axial direction of the developer roller. The rectifier member includes a developer collecting part that is spaced apart by a predetermined distance from a surface of the developer roller, and a rectifying part to guide air from within the developing device via the developer collecting part toward an upstream side of the development region, in a rotational direction of the developer roller.

3. 发明申请

US20210356885A1 FORMING ELECTROSTATIC LATENT IMAGES 有权
公开(公告)号：US20210356885A1
公开(公告)日：2021-11-18
申请号：US17282483
申请日：2019-09-24
申请人： Hewlett-Packard Development Company, L.P.
发明人： Naoya IWATA
IPC分类号： G03G15/08
摘要： A device to develop an electrostatic latent image in an imaging apparatus includes first and second passages coupled to each other through first and second openings to form a circulation passage. A first stir-and-transport member is located in the first passage and includes a first helical blade to stir and transport a developer from the first opening to the second opening along the first passage in a first direction and to supply the developer to a developing roller. A second stir-and-transport member is located in the second passage and includes a second helical blade to stir and transport the developer from the second opening to the first opening along the second passage in a second direction. A developer discharge pipe is coupled to the developer container to communicate with a downstream side of the first passage. The first stir-and-transport member includes a first reverse helical blade located downstream of the first helical blade and disposed downstream of the second opening. The pitch of the first reverse helical blade is between approximately 0.5 times and 1.5 times the pitch of the first helical blade.

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