Samsung Electronics Co., Ltd.

Kyung-shig Chung

Sung-Hoon Hong

Byung-sun Ahn

Heung-sup Jeong

Byeong-hwa Ahn

Woo-chul Jung

Min-Goo Choi

Jin-soo Lee

Se-Hyun Lyu

Young-min Yoon

Cheol-young Han

Soo-yong Kim

Seock-deock Hong

Jin-yoon Kim

Jae-Hak Lee

Eun-sang Park

Gi-cheol Jeong

Se-min Kim

Han Cheol Young

Myoung-suck Lee

An image forming apparatus including a printing unit which prints an image on paper, an exit path which connects an exit of the printing unit to an exit member which pushes the paper outside of the printing unit, a plurality of guide members which are arranged widthwise of the paper, each guide member having a first guide side which guides the paper coming out of the printing unit along the exit path, wherein each guide member is installed to be movable such that the first guide side rotates when the first guide side contacts the paper which comes out of the printing unit, and returns to its original position after the paper completely passes through the printing unit.

Image forming apparatus

A fusing unit provided in a printing path of an image forming apparatus to fuse an image transferred onto a printable medium, the fusing unit including a heat source; a heating roller of which a surface is heated by heat generated by the heat source; a plurality of pressing rollers which is provided opposite to the heating roller and presses a supplied printable medium in cooperation with the heating roller; a fusing pressing belt which is wound on the plurality of pressing rollers and forms a fusing nip contacting with the heating roller; and a supporting unit which rotatably supports the plurality of pressing rollers and guides the fusing pressing belt, a surface hardness hof at least one of the plurality of pressing rollers is greater than or equal to a surface hardness hof the heating roller.

Fusing device and image forming apparatus using the same

A fusing device that is provided on a printing passage of an image forming apparatus and fuses an image transferred to a print medium, the fusing device including: a heating roller; a pressure roller to press the print medium fed along the printing passage against the heating roller; a separation roller to separate the print medium from the heating roller; a fusing pressure belt that winds around the pressure roller and the separation roller; a first elastic member to pressure the pressure roller towards the heating roller along a first line; and a second elastic member to pressure the separation roller towards the heating roller, wherein the first line passes through a center of the pressure roller and forms an angle towards the separation roller with a second line that passes through a center of the heating roller and the center of the pressure roller.

Endless belt type fusing device and image forming apparatus employing the same

An image forming apparatus includes a developing unit to form an image using a developing agent on one side of a printing medium transported along a simplex printing path, a fixing unit to fix the developing agent on the printing medium, a discharging roller to discharge the printing medium that passes the fixing unit, and a first driving source to drive the developing unit, the fixing unit and the discharging roller.

Image forming apparatus having controller to selectively control plurality of driving sources

A method and apparatus for fuser cooling fan control is provided. An image forming apparatus so configured comprises a fixing unit, a cooling fan for cooling the fixing unit, a detecting sensor for measuring ambient temperature and humidity of the image forming apparatus, and a controller for recognizing ambient temperature and humidity change from the measurement provided by the detecting sensor. The controller controls operation of the cooling fan according to the temperature and humidity change detected. The controller delays operation of the cooling fan by an amount of time if the ambient temperature and/or humidity is below a reference temperature and humidity level.

Fuser cooling fan control method and image forming apparatus having the same

A bearing structure reduces friction between a roller and a bearing under a pressure. A fusing device for an image forming apparatus employs the bearing structure. The bearing structure installed between a frame and a rotary shaft supports the rotary shaft on the frame. A bearing body has a fitting part in which the rotary shaft is rotatably fitted. A rolling support unit is installed on at least one portion inside the fitting part to contact the rotary shaft in a rolling manner. The fusing device includes a fusing roller in which a heater is embedded, and a pressure roller that faces the fusing roller and cooperates with the fusing roller in pressing a sheet of paper passing therebetween. Bearing structures rotatably support the fusing roller and the pressure roller on a frame. Each bearing structure includes a bearing body having a fitting part, and a rolling support unit installed on at least one area inside the fitting part to contact the fitted roller in a rolling manner.

Bearing structure and fusing device for image forming apparatus employing the bearing structure

A fuser of an electrophotographic image forming apparatus fuses a toner image to a recording medium by applying heat and pressure. The fuser includes first and second rollers that are elastically biased against each other and that rotate while facing each other. An elastic layer is provided on at least one of the first and second rollers, and a heat source is provided on at least one of the first and second rollers. A gear is coupled to an end portion of at least one of the first and second rollers. First and second interval maintenance members are respectively coupled to the first and second rollers at the end portions of the rollers which are opposite to the end portion where the gear is coupled. The first and second maintenance members face each other and contact each other to regulate an amount of compression of the elastic layer.

Rotary roller structure employing interval maintenance members and fuser of image forming apparatus employing the same

A fusing unit and a fusing apparatus using the fusing unit are provided. The fusing unit includes a pipe-shaped fusing roller having a heat generating unit and electrode members at both ends thereof. A power supply unit contacts the electrode members and supplies current thereto. A blocking member is disposed between the electrode members and the power supply units to block current by separating the power supply unit from the electrode members when a temperature of the heat generating unit rapidly increases.

Fusing unit and fusing apparatus using the same

A roller assembly for an image forming apparatus includes a roller, a bearing for rotatably supporting the roller, a roller cover to be assembled at both ends of the roller, a bushing to be introduced between the roller and the bearing, and a support unit disposed at the roller and the bushing to suppress sliding movement between the roller and the bushing and shaking of the roller in an axial direction.

Roller assembly for image forming apparatus

An apparatus to switch a paper feed direction for an image forming device includes a paper guide part disposed across a paper feed path to move from an initial position to a paper passing position or a paper jam removing position by a force generated by passing of the paper, or external power; a supporting part to rotatably fix the paper guide part to a frame of the office machine; an elastic restoring part to restore the paper guide part from the paper jam removing position to the paper passing position; and a restoring force blocking part to block a force of the elastic restoring part from acting on the paper guide part until the paper guide part fixed to the supporting part rotates beyond the paper passing position. The apparatus blocks a force of the elastic restoring part from acting on the paper guide part until the paper guide part is rotated beyond the paper passing position, thereby reducing resistance against the paper and consequently preventing the paper from being blocked due to curling and jamming.

Apparatus for switching paper feed direction of image forming device

A fixing unit and an image forming apparatus using the same. The fixing unit includes: a pair of fixing rollers that rotate and face each other and apply heat and pressure to a toner image transferred to the sheet of paper using electrophotography; a plurality of guide members disposed in the width direction of the sheet of paper to guide the sheet of paper discharged from the pair of fixing rollers to the discharge path, each of the guide members including a first guiding portion extending toward the discharge path from an outlet of the pair of fixing rollers; a first arm rotatably installed between the guide membersthat elastically contact the sheet of paper drawn out of the pair of fixing rollers and guide the sheet of paper to the discharge path; and an elastic member elastically biasing the first arm such that the first arm contacts the sheet of paper, wherein a guide member adjacent to the first arm has a second guide portion that is shorter than the first guide portion.

Fixing unit used with an image forming apparatus and an image forming apparatus having the same

A fusing unit used with a color laser printer includes a pair of rollers which heat and press a sheet of paper, onto which an image is transferred, and fuse the transferred image on the sheet of paper, and plastic mold bearings which rotatably support the rollers to be centered on frames.

Fusing unit used with a color laser printer

A fusing apparatus and method for an image forming apparatus comprise a housing, a first roller mounted in the housing, a second roller rotated in contact with the first roller, a heater movably mounted in at least one of the first and the second rollers and comprising a first heater and a second heater, a first power supplying terminal and a second power supplying terminal movably supported in the housing, and a pair of connection units movably supported in the housing to connect the respective heater terminals to the corresponding power supplying terminals. The power supplying terminals and the connection units have a predetermined gap with an outer surface of the housing, such that when the housing expands in a lengthwise or horizontal direction of the heater, the outer surface of the housing tightly contacts with at least one of the heater terminals, the power supplying terminals and the connection units, thereby fixing or securing the heater in the housing.

Fusing apparatus for an image photographing apparatus and method thereof

A system to replace a photosensitive unit and a transfer unit in a printer includes a frame provided in a printer body, and a locking unit which is provided in the frame and simultaneously locks and unlocks the photosensitive unit and the transfer unit that enter via an entrance of the printer body and are seated in a mounting location. The locking unit may include a rotating lever, a rotating cam, and a connection bar which connects the rotating cam to the rotating lever.

Growing community of inventors

Suwon-si, South Korea

Kyung-shig Chung