Samsung Electronics Co., Ltd.

Jong-pil Jun

Yong-sung Kim

Mitsuru Oikawa

Hyung-Won Yoon

Sang-don Lee

A developing device to supply toner in a developer, including a development member which receives the developer on an outer circumferential surface thereof and supplies the toner to the image bearing member, a first regulation member including a first regulating portion that forms a first doctor gap between the outer circumferential surface of the development member and the first regulating portion, and a second regulation member disposed on an upstream side of the first regulation member in a rotational direction of the development member and includes a second regulating portion that forms a second doctor gap between the outer circumferential surface of the development member and the second regulating portion, the second doctor gaps at a central portion and both end portions in a longitudinal direction of the development member being different from each other.

Developing device to form a uniform developer layer on a developing member and electrophotographic image forming apparatus using the same

A developing cartridge and an image forming apparatus employing the same which include a developer sealing configuration to prevent a developer in a developing chamber of the developing cartridge from leaking during a distribution process are disclosed. The developing cartridge of an image forming apparatus, the developing cartridge including: a developing housing which accommodates therein a developer and includes an opening through which the developer is supplied to the outside; an image carrier which is mounted in the developing housing; a developing roller which is mounted in the opening of the developing housing to face the image carrier and develops an image on the image carrier; and a sealing member which includes a sealing part partially provided between the image carrier and the developing roller in a sealing location and sealing the opening and a grip part extended from the sealing part to an outside of the developing housing.

Developing cartridge and image forming apparatus employing the same

A developer cartridge of an image forming apparatus includes a cartridge frame having a developer chamber holding a developer therein, and a developer discharging port, a developer conveying unit rotatably installed on the cartridge frame to agitate and move the developer towards the developer discharging port, and an elastic damper to change the size of a developer discharge space defined by the vicinity to the developer discharging port according to a developer delivery pressure of the developer conveying unit. The damper contracts to increase a size of the developer discharge space and reduce the developer delivery pressure, when the developer delivery pressure increases above a normal pressure in the developer chamber.

Developer cartridge with deformable member, and image forming apparatus having the same

A toner supplying apparatus having a sealing member. The toner supplying apparatus includes a toner tank to hold toner, the toner tank having a toner supplying hole to discharge the toner, a slide shutter disposed inside the toner tank so as to close the toner supplying hole, the slide shutter allowing the toner supplying hole to be opened when the toner tank is mounted in an image forming apparatus, and a sealing member disposed on an outer circumference of the slide shutter to prevent the toner from leaking out through a gap between the slide shutter and the toner tank.

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Hwaseong-si, South Korea

Jong-pil Jun