Samsung Electronics Co., Ltd.

S-printing Solution Co., Ltd.

Hewlett-packard Development Company, L.p.

Hp Printing Korea Co., Ltd.

Byeong-no Jeong

Seong-ho Jeong

Jong-won Han

Sang-jin Park

Jong-in Kim

Dong-Uk Kim

Ji-won Moon

Gun-soo Chang

Yong-hun Kim

Ho-jin Jang

Dong-Geun Lee

Seung-chan Park

Hyung-seok Chang

Sang-Jin Park

Jong-Won Han

Seong-Jo Jeong

Seong-Ho Jeong

An electrophotographic image forming apparatus may include an imaging cartridge and a toner cartridge that are detachably attached to a main body, a first optical sensor that is mounted in the imaging cartridge and detects a toner level in a development chamber, and a second optical sensor that is mounted in the toner cartridge and detects a toner level in the development chamber.

Electrophotographic image forming apparatus, toner cartridge for the same, imaging cartridge for the same, and method of controlling toner level in developing chamber of the same

A toner cartridge and an electrophotographic image forming apparatus are provided. The toner cartridge attachable to, or detachable from a main body of an image forming apparatus includes a toner containing unit, a waste toner containing unit that is disposed below the toner containing unit in a gravitational direction and comprises a waste toner inlet through which waste toner flows, a first waste toner transporting member that transports the waste toner from the waste toner inlet in a length direction of the waste toner containing unit, and a second waste toner transporting member that transports the waste toner that is transported in the length direction of the waste toner containing unit in a width direction of the waste toner containing unit to disperse the waste toner in an inner portion of the waste toner containing unit, wherein a rotational center of the second waste toner transporting member is lower than a rotational center of the first waste toner transporting member.

Toner cartridge and electrophotographic image forming apparatus using the same

An electrophotographic image forming apparatus includes an imaging cartridge and a toner cartridge that are detachably attached to a main body, a first optical sensor that is mounted in the imaging cartridge and detects a toner level in a development chamber, and a second optical sensor that is mounted in the toner cartridge and detects a toner level in the development chamber.

An electrophotographic image forming apparatus and a development cartridge are provided. The electrophotographic image forming apparatus includes a body including an opening, a photoreceptor cartridge attached to, or detached from, the body through the opening, a photoconductive drum and a mounting portion, a development cartridge attached to, or detached from, the mounting portion through the opening while the photoreceptor cartridge is mounted in the body, a development roller supplying toner to an electrostatic latent image formed on the photoconductive drum, a cover for opening or closing the opening, and a pressurizing unit fixing the development cartridge to the mounting portion by providing a pressing force to the development cartridge in a direction parallel to a center line connecting centers of the photoconductive drum and development roller while the opening is closed.

Electrophotographic image forming apparatus and development cartridge

A process cartridge usable with an image forming apparatus includes a developing member, a photosensitive medium to face the developing member, a pair of supporting plates to rotatably support the developing member and the photosensitive medium; a center moving member rotatably disposed on the supporting plate, the center moving member having a first position in which the photosensitive medium contacts the developing member and a second position in which the photosensitive medium is spaced apart from the developing member; and a separation restraining member formed so that when the center moving member locates at the second position, the separation restraining member restrains the center moving member from moving from the second position.

Process cartridge and image forming apparatus having the same

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Suwon-si, South Korea

Byeong-no Jeong