Hewlett-packard Development Company, L.p.

Seongwoong Yang

Jinhong Kim

Jinsam Park

Youngchae Kim

Jin-Hong Kim

Gun Heo

Sunghoon Oh

Provided is a waste toner container including a housing having a first reservoir and a second reservoir, a light sensor including a light emitting portion and a light receiving portion, and a light guide member to connect the light emitting portion with the light receiving portion. The light guide member includes a first detection portion and a second detection portion each including a pair of optical surfaces that are apart from each other, and the first and second detection portions are provided in the first and second reservoirs, respectively.

Structure to detect full state of two reservoirs in waste toner container

A toner cartridge includes: a housing to accommodate toner and including a fastening boss at a front end; a front cover including a fastening hole aligned with the fastening boss; a fastening member including a fastening portion and a head portion, the fastening portion configured to pass through the fastening hole and be fastened to the fastening boss to couple the front cover to the housing; and a separating portion to allow the fastening hole to be separated from the head portion of the fastening member by an external force acting on the front cover.

Toner cartridge having front cover

A developing device may include a housing to accommodate a developing agent, a developing roller to convey the developing agent adhered to an outer periphery of the developing roller to an outside of the housing, a regulation member positioned apart from the developing roller and having a circular cross-sectional shape to regulate a thickness of the developing agent adhered to the developing roller, and a sealing member between the regulation member and the housing to prevent leakage of the developing agent. A diameter of a central portion of the regulation member may be different from diameters of both end portions of the regulation member.

Developing device including regulation member with different diameters of central portion and both end portions

A toner cartridge includes a body accommodating toner, a front cover located in front of the body and provided with a first opening forming a grip portion for pulling the toner cartridge forward, an opening/closing member which is located inside the front cover and is switched to a first position closing the first opening and a second position opening the first opening, and an elastic member configured to apply an elastic force to the opening/closing member in a direction to be located at the second position.

Growing community of inventors

Suwon-si, South Korea

Seongwoong Yang