Samsung Electronics Co., Ltd.

Jin-soo Lee

Heung-sup Jeong

Se-Hyun Lyu

Jae-myoung Choi

Byeong-hwa Ahn

Young-min Yoon

Woo-chul Jung

Heung-kyu Jang

Byung-sun Ahn

Jae-Yong Kim

Jae-yong Kim

Hoon Jong Kang

Hong-Sung Chang

Sang-Jun Moon

Tae-Won Kim

Jin-Man Kim

Min-seon Kim

Kyung-shig Chung

Ki-hun Kim

Young-Ki Jeon

Kwang-taek Lim

Yu-man Kim

Sang-Do Lee

Bong-Hwan Choi

Jae-Hak Lee

Hoon Chul Kang

Je-Hyun Jung

Soo-Hoi Kim

Jin-Seok Ko

Heung-eup Jeong

An image forming apparatus, including an image forming part which forms an image on a printing medium, a main feeding part which accommodates the printing medium and supplies the printing medium to the image forming part, and a reversing part which transfers the printing medium, on which an image is formed on a first surface thereof in the image forming part, to the main feeding part, wherein the main feeding part includes a feeding roller part which re-feeds the printing medium, having been transferred through the reversing part, to the image forming part.

Image forming apparatus capable of forming a duplex image on one sheet

An image forming apparatus and an image forming method therefor. The image forming apparatus includes: an image forming part, which forms printed and alternate printed images including different developing agents to a recording medium; and a controller which controls the image forming part to form a the printed and alternate printed images according to a comparison of number of pages of a print job and a reference number of pages, and a whether the images of the print job are of a single color.

Image forming apparatus and image forming method thereof to print alternative images at an interval during a print job

A printing medium supplying apparatus for an image forming apparatus includes an apparatus main body, and a printing medium aligning unit which is disposed on the apparatus main body to move between an aligning position at which the printing medium aligning unit aligns a printing medium and a distanced position at which the printing medium aligning unit is distanced from the aligning position.

Printing medium supplying apparatus and image forming apparatus having the same

A printing medium feeding apparatus includes a feeding part which feeds a printing medium, and a printing medium aligning roller part which aligns a leading edge of the printing medium fed from the feeding part and transfers the aligned printing medium to an image forming part which forms an image on the printing medium, wherein the printing medium aligning roller part comprises a pair of rollers which transfer the printing medium to the image forming part, and an aligning shutter which is rotationally coupled to at least one of the pair of rollers, which rotates when the leading edge of the printing medium contacts the aligning shutter with a pressure greater than a reference pressure in a reference direction and guides the leading edge of the printing medium fed from the feeding part toward the reference direction.

Printing medium feeding apparatus and image forming apparatus having the same

A medium supplying unit of an image forming apparatus includes: a cassette frame; a loading plate which is movably coupled to the cassette frame, and which supports a printing medium thereon; a pickup roller which picks up the printing medium from the loading plate; and a loading plate moving unit which causes the loading plate between a knock up state in which the loading plate located to allow the printing medium can be picked up by the pickup roller and a knock down state in which the loading plate is separated from the pickup roller, the loading plate moving unit causing the loading plate to move during when the loading plate is in the knock down state so as to reduce the occurrence of multiple sheets of printing media being picked up and supplied.

Medium supplying unit and image forming apparatus having the same

An image forming apparatus includes an image forming unit to form an image on a printable medium; a casing to accommodate the image forming unit; a feeding cassette coupled to the casing and arranged so as to move between a feeding position where the feeding cassette is separated from the casing and used to store the printable medium and a waiting position where the feeding cassette is folded up against the casing; a main feeding unit arranged within the casing to store another printable medium and to supply the another printable medium to the image forming unit; a pick-up roller to feed the printable medium from the feeding cassette to the image forming unit when the feeding cassette is in the feeding position; and a pick-up roller cover coupled to a main feeding unit so that the pick-up roller cover can rotate between an open position and a closed position.

Image forming apparatus having pick-up roller cover

A printing media supply device for use in an image forming apparatus includes a printing media supply cassette adapted to receive a stack of printing media. A pick-up roller picks up the printing media stacked in the printing media supply cassette. The pick-up roller has a pick-up member for picking up the printing media, and a rotation member for supporting the pick-up member. The rotation member has a buffer surface formed by cutting a portion of a leading edge portion thereof away. The buffer surface may be formed so as to expose side surfaces of the pick-up member. The pick-up roller applies a substantially uniform pressure to the printing media even when there is a large quantity of printing media stacked in the printing media supply cassette, and thereby minimizes multifeeding of the printing media. Accordingly, the supply of printing media is stable, improving the printing media supply efficiency.

Printing media supply device for image forming apparatus

A door opening and closing unit is provided for an image forming apparatus. The image forming apparatus includes a main body, and a door rotatably mounted on the main body. The door opening and closing unit includes a door speed control unit coupling the door to the main body that includes a coupling boss; and a guide groove that engages the coupling boss and along which the coupling boss moves as the door rotates relative to the main body; wherein the door speed control unit controls a frictional force between the coupling boss and the guide groove according to a rotating angle of the door relative to the main body to control a rotating speed of the door as the door rotates relative to the main body.

Door opening and closing unit to control door rotating speed and image forming apparatus having the same

A transfer unit-fixing apparatus to integrally fix a transfer unit on a door, and an image forming device having the same are disclosed. The transfer unit-fixing apparatus includes a position fixing unit to pivotally support a first part of the transfer unit on the door and a locking unit to lock a second part of the transfer unit to the door. The transfer unit can be easily assembled and disassembled to and from the door by the position fixing unit and the locking unit, and thus the image forming device can be easily assembled, maintained and repaired.

Transfer unit-fixing apparatus and image forming device having the same

Provided are a paper pickup device and an image forming apparatus having the same. The paper pickup device and the image forming apparatus having the same include a driving shaft whose end has a first combining portion and a driving shaft having a second combining portion configured to be integrally connected with the first combining portion. When the first combining portion and the second combining portion are combined with each other, the driven shaft bends and separates from the driving shaft. The first combining portion and the second combining portion may be screw-coupled to each other.

Paper pickup device and image forming apparatus having the same

A paper feeding device includes a guide member that guides both sides of a sheet of paper stacked in a paper feeding cassette and a support unit that prevents the guide members from being moved due to inertia of sheets of paper during installation of the paper feeding cassette. Accordingly, the paper feeding device contacts and supports one side of the guide unit and prevents the guide unit from being moved. Therefore, a sheet of paper may prevented from being separated from a finger during installation of the paper feeding cassette. Furthermore, a paper jam or skew due to the separation of the paper may be prevented.

Paper feeding device and image forming apparatus including the same

An electrophotographic includes a main frame, a photosensitive drum unit vertically detachably installed on the main frame and having a photosensitive drum on which an electrostatic latent image is formed, and an intermediate transfer unit vertically detachably installed on the main frame and having a transfer belt to which a toner image is transferred from the photosensitive drum, wherein the intermediate transfer unit is installed above the photosensitive drum unit.

Electrophotographic printer having removable photosensitive drum unit

An image forming apparatus having a printing medium feeding unit is provided. The image forming apparatus includes a driving roller and an idle roller which engage with each other and which feed a printing medium, an elastic member which elastically biases the driving roller toward the idle roller, and a releasing member. The releasing member releases the elastic member when a cover door is opened so that the driving roller and idle roller may be separated from one another to remove a jammed printing medium. Accordingly, when a jammed printing medium is removed, the printing medium is not crumpled or torn, parts of the image forming apparatus are not damaged, and the image forming apparatus does not malfunction.

Image forming apparatus having printing medium feeding unit

Provided is a paper feeding device. The paper feeding device includes an image forming unit, a paper feeding unit to provide a transfer force to a first side and a second side opposite to the first side. The paper feeding unit has a roller portion to transfers the paper to the image forming unit and a paper-feeding controlling unit to operate the roller portion so as to interrupt the transfer force applied to the paper when a rear end of the paper passes through the roller portion.

Growing community of inventors

Suwon-si, South Korea

Jin-soo Lee