Hewlett-Packard Development Company, L.p.

Yoshihiko Ichikawa

Mitsuru Oikawa

Ji-Won Moon

Yunkyu Shim

Ohdug Kwon

Ho-Ryul Lee

Minguk Go

Horyul Lee

An example developing device includes a developing roller, a regulation blade to regulate a thickness of a toner layer attached to an outer circumference of the developing roller, a blade bracket for supporting the regulation blade, and an inner duct including an air supply port and extending in a longitudinal direction of the developing roller to form a flow path of air to cool the blade bracket.

Cooling structure for regulation blade of developing device

An example developing device includes a housing to contain a developer and having an opening, a developing sleeve provided in the housing and partially exposed to the outside of the housing through the opening, a magnetic member including a plurality of magnetic poles and located inside the developing sleeve, and an elastic member blocking an inflow of air through a space between a downstream edge of the opening in a rotation direction of the developing sleeve and an outer circumferential surface of the developing sleeve. The elastic member includes a fixed portion fixed to the housing at a position adjacent to the downstream edge of the opening and an extension portion extending from the fixed portion in a bent form in the rotation direction of the developing sleeve to be elastically in contact with the surface of the developing sleeve.

Developing device with elastic film to block air input

An image forming apparatus includes a body, a development cartridge to be attached to or detached from the body, and a fixing device to fix toner to a recording medium. The development cartridge includes a heat transfer blocking member disposed on an outer side of the development cartridge and adjacent to the fixing device when the development cartridge is attached to the body.

Developing cartridge having a heat transfer blocking member

Growing community of inventors

Pangyo, South Korea

Yoshihiko Ichikawa