Samsung Electronics Co., Ltd.

Hp Printing Korea Co., Ltd.

Jai-Il Choi

Jong-in Kim

Dong-cheol Ahn

Min-Sik Ji

Sang-hoon Lee

Sang-Hun Lee

Jun-hee Lee

Yoo-hung Jeong

Disclosed are an electrophotographic image forming apparatus including a detachable development cartridge having arranged therein a photoconductive drum and a developing roller for forming a toner image through a development nip formed between the photoconductive drum and the developing roller. The development cartridge may include a development nip control member that can switch between a first position, in which the development nip control member causes the photoconductive drum to be separated from the developing roller, and a second position, in which the development nip control member causes the photoconductive drum to be in a pressing contact with the developing roller so as to form therebetween the development nip. The development cartridge may be mounted in the main body of the electrophotographic image forming apparatus with its development nip control member being in the first position, separating the photoconductive member from the developing roller. The electrophotographic image forming apparatus may be packaged for distribution with the development cartridge received in the main body thereof where the photoconductive drum and the developing roller are no in contact with each other in the development cartridge as packaged.

Image forming apparatus, method of handling the image forming apparatus, and method of packaging the image forming apparatus

A developing device detachably coupled to an electrophotographic image forming apparatus which includes a housing including a photoconductive drum and at least one roller; and an electrical contact member disposed in the housing, connected to the at least one roller, and formed of a conductive metallic plate to provide an electrical path between the at least one roller and a power supply when the developing device is attached to the electrophotographic image forming apparatus, wherein the electrical contact member includes a base including a coupling unit to engage with the housing, a first elastic member to bend from the base in a first direction; a second elastic member to bend from the first elastic member in a second direction and including a contact to contact the at least one roller; and an anti-deformation unit to bend from the base and to face a surface of the first elastic member in the second direction of the second elastic member to prevent the first elastic member from bending in the second direction.

Developing device and electrophotographic image forming apparatus including the developing device

A developing device has a housing including a toner container containing toner, and a developing unit. The developing unit includes a developing roller and a photoconductive drum, and a barrier member including a toner supply window. The barrier member is combined with the housing to separate the toner container and the developing unit from each other. The developing unit also includes a blocking film that is attached to the barrier member to block the toner supply window. An end of the blocking film is exposed outside the housing through an opening formed in a sidewall of the housing. A bottom surface and first and second side surfaces of the barrier member are attached to a bottom surface and first and second side surfaces of the housing by using a welding process, and a distance between the first and second side surfaces of the barrier member and a distance between the first and second side surfaces of the housing increase from bottom to top.

Developing device and image forming apparatus employing the same

An image forming apparatus includes a developing part having a developing process roller and a position restricting protrusion; a main body having an installation part to install the developing part and a roller driving part driving the developing part; a position restricting groove part to engage the position restricting protrusion so that the developing process roller engages the roller driving part when the developing part is installed; a first rotation supporting part between the installation and developing parts to be positioned at a first position when the developing part is installed to the installation part, and supporting the developing part so that the position restricting protrusion detaches from the position restricting groove part; and a second rotation supporting part between the installation and developing parts to be positioned at a second position and supporting the developing part so that the position restricting protrusion detaches from the position restricting groove part.

Image forming apparatus

Developing device for laser printer

Development device for laser printer

Growing community of inventors

Suwon-si, South Korea

Jai-Il Choi