Samsung Electronics Co., Ltd.

S-printing Solution Co., Ltd.

Hewlett-packard Development Company, L.p.

Seung-gweon Lee

Sang-hoon Lee

Ho-jin Jang

Jong-in Kim

Woong-Yong Choi

Young-chae Kim

Ki-hyun Yoo

Jin-hwa Hong

Seong-woong Yang

Yun-Kyu Shim

Sang-jin Park

Ji-won Moon

Sam-seok Choi

Jean-Man Sur

Seung-beom Yang

Woojin Kim

Dong-Uk Kim

Jong-moon Eun

Jinhwa Hong

Dong-cheol Ahn

Joon-hee Kim

Hyun-wook Bae

Yongnam Ahn

Sungchul Ahn

Yongil Moon

Yong-kwan Cho

Seongho Jeong

Byeongno Jeong

Sung-min Park

Sang-Jin Park

A development cartridge for an image forming apparatus includes a photoconductive unit including a photoconductive drum, a developing unit including a developing roller having a rotation shaft and coupled to the photoconductive unit to be rotatable to a release position where the developing roller is separated from the photoconductive drum, and to a development position where the developing roller contacts the photoconductive drum, and a coupler located between and couplable to the rotation shaft of the developing roller and a rotational power transmission member. When the coupler is coupled to the rotational power transmission member, the coupler is selectively rotatable in a first rotation direction or a second rotation direction by a rotational force from the rotational power transmission member. When the coupler is rotated in the first rotation direction and then in the second rotation direction, transmission of the rotational force to the developing roller is partially interrupted.

Development cartridge having a switch member to rotate developing unit to a development position

Development cartridge for a printer

Provided is a development cartridge mounted on a main body of an image forming apparatus. The development cartridge includes a photoconductive unit, a developing unit coupled to the photoconductive unit so as to rotate to a development position and a release position, and an elastic member that provides an elastic force to maintain the developing unit at the development position. A switching member is mounted on a rotation shaft of the developing roller to be rotatable about a rotation shaft of a developing roller. The switching member is switched to a first state where the switching member contacts an interfering portion of the photoconductive unit and rotates the developing unit to the release position and to a second state where the switching member is separated from the interfering portion and allows the developing unit to rotate to the development position due to the elastic force of the elastic member.

Cartridge

A cartridge unit to discharge toner via a toner outlet and an electrophotographic image forming apparatus are provided. The cartridge unit includes a shutter unit movable between an opening position in which the toner outlet is opened and a closing position in which the toner outlet is closed in a first direction, and a lever unit movable in a second direction across the first direction, and connected to the shutter unit such that the shutter unit moves in the first direction when the lever unit moves in the second direction.

Cartridge unit and electrophotographic image forming apparatus including the same

Provided is a process cartridge attachable to and detachable from a main body of an image forming apparatus. The process cartridge includes at least one roller, sidewalls on an axial direction of the at least one roller, and a first cartridge electric contact and a second cartridge electric contact provided on the sidewalls. One of the first cartridge electric contact and the second cartridge electric contact is a fixed electric contact, and the other is a movable electric contact that is movable in a direction protruding from the sidewalls.

Process cartridge having fixed and moveable electric contacts and electro-photographic image forming apparatus using the process cartridge

A cartridge attachable to and detachable from a body of an image forming apparatus includes a toner container containing a toner and including a stirring member configured to stir the toner, and a developing section connected to the toner container through a supply port and including a developing section stirring member configured to stir the toner, a supply roller configured to receive the toner supplied from the developing section stirring member, and a developing roller configured to receive the toner supplied from the supply roller. A rotation ratio of the stirring member to the supply roller is 5% to 25%.

Cartridges and electrophotographic image forming apparatus using the same

A developing device includes: a photosensitive body on which an electrostatic latent image is formed; a development chamber; a development roller that faces the photosensitive body and transfers toner to the electrostatic latent image; a supply roller that supplies toner from the development chamber to the development roller; and an agitating member that is disposed under the supply roller in the development chamber and agitates the toner that is in the development chamber.

Developing device and image forming apparatus including the same

Cartridge for printer

An electrophotographic image forming apparatus and a development cartridge are provided. The electrophotographic image forming apparatus including a body including an opening, a photoreceptor cartridge attached to, or detached from, the body through the opening, and including a mounting portion, and a development cartridge attached to, or detached from, the mounting portion through the opening while the photoreceptor cartridge is mounted in the body. The mounting portion includes first and second guide rails, and both side portions of the development cartridge respectively include first and second guide protrusions having different protrusion amounts from the both side portions to be respectively guided by the first and second guide rails.

Electrophotographic image forming apparatus and development cartridge

An electrophotographic image forming apparatus is provided including a body including an opening and a first coupler, a photoreceptor cartridge including a second coupler connected to the first coupler, a first gear connected to the second coupler, and a mounting portion, and attached to or detached from the body through the opening; and a development cartridge including a second gear connected to the first gear and attached or detached from the mounting portion through the opening while the photoreceptor cartridge is mounted in the body.

Electrophotographic image forming apparatus

Growing community of inventors

Suwon-si, South Korea

Seung-gweon Lee