Samsung Electronics Co., Ltd.

Hewlett-packard Development Company, L.p.

Sang-uk Jeon

Dong-kyun Kim

Bong-hee Lee

Jin-seok Lee

Sung-Won Kim

Ju-hyeong Lee

Sun-hyung Lee

A fusing device according to an embodiment of the present general inventive concept includes a pressing unit, a heating fusing belt contacts an outer surface of the pressing unit and rotates, a nib forming unit contacts an inner surface of the heating fusing belt and forms a nib at a contact portion between the pressing unit and the heating fusing belt, a first guide unit disposed at both end portions of the heating fusing belt so as to guide the movement of the heating fusing belt, and a second guide unit disposed between the first guide units and having a plurality of ribs which are arranged spaced apart from each other along a rotational direction of the heating fusing belt, so as to guide the movement of a central portion of the heating fusing belt.

Fusing device and eletrophotographic image forming apparatus including the same

A fixing apparatus includes a heating roller and a nip forming unit facing the heating roller to form a fixing nip. The heating roller includes a resistive heating layer receiving an electric current to generate heat, and a base material supporting the resistive heating layer, wherein a resistance per unit length of the resistive heating layer at opposite sides in a length direction is less than a resistance per unit length of the resistive heating layer at a center portion.

Fixing apparatus and electrophotographic image forming apparatus including the same

A fusing apparatus to fuse a toner image transferred to a printing medium by applying heat and pressure. The fusing apparatus includes a separation member that is rotatably mounted on a rotation axis to separate the printing medium from one of a heating roller and a pressing roller. The separation member includes a hollow portion into which the rotation axis is inserted, and a separation portion that contacts an outer circumference of the heating roller. The separation member is installed so as to be pitched around the rotation axis and a pitching axis having an inclination angle within a range of &#xb1;10&#xb0; with respect to a line that connects a contact point between the separation portion and the outer circumference of the roller from which the printing medium is to be separated and a center of the roller from which the printing medium is to be separated.

Fusing apparatus and electrophotographic image forming apparatus using the same

An image forming apparatus includes a heat roller heated to a preset temperature; a pressure roller for having conductivity and forming a nip by pressure-contacting with the heat roller; a power supply unit to apply a bias voltage to the pressure roller; and a controller to, when a printing paper enters the nip, control the power supply unit to apply the bias voltage to the pressure roller. When a time interval is longer than a preset time, the controller can control the power supply unit not to apply the bias voltage when the printing paper is not placed in the nip, and when the time interval is shorter than the preset time, the controller can control the power supply unit to apply the bias voltage when the printing paper is not placed in the nip.

Image forming apparatus and method for controlling fuser thereof

An image forming apparatus to remove a jammed printing medium and to prevent a transmission of fixing heat is provided. The image forming apparatus includes a fixing unit to fix a toner image into a printing medium when the toner image is transferred onto the printing medium, the fixing unit including a fixing frame on which a pair of fixing rollers are rotatably disposed, at least one discharge roller disposed on the fixing frame, and a discharge guide movable with respect to the fixing frame, and having a plurality of guide protrusions to guide the printing medium toward the discharge roller when the printing medium passes through the fixing unit. The fixing unit additionally includes a cover to cover the discharge roller and the discharge guide, and a plurality of heat dissipating ribs extending from an outer surface of the cover. The heat dissipating ribs have a height and are arranged at a gap from each other so as to prevent a user's hand from directly contacting the cover.

Growing community of inventors

Yongin-si, South Korea

Sang-uk Jeon