Samsung Electronics Co., Ltd.

S-printing Solution Co., Ltd.

Gi-cheol Jeong

Byeong-hwa Ahn

Byung-sun Ahn

Soo-yong Kim

Kyung-shig Chung

Seock-deock Hong

Se-min Kim

Byeong-Hwa Ahn

An image forming apparatus includes a transfer unit detachably supported by a body frame to transfer an image on an image holding member to a recording medium. A driving unit installed on the body frame provides a rotational driving force to the transfer unit. A waste developing agent container is selectively attached to the body frame to store waste developing agent collected from the transfer unit. An engagement assembly is installed on the body frame to selectively engage the transfer unit with the driving unit to the transfer unit while at the same time allowing or blocking the installation of the waste developing agent container in the body frame in accordance with the state of engagement of the transfer unit.

Transfer unit engagement assembly of an image forming apparatus

An image forming apparatus including: a main body including a manipulating unit which manipulates the power transmission unit, a driving component having a driving assembling member which is disposed in a direction of a rotational driving axial line; a developing device which has a driven assembling member capable of being engaged with and disengaged from the driving assembling member along the direction of the rotational driving axial line; a power transmission unit which is disposed between the driving assembling member and the driven assembling member and enables at least one of the driving assembling and the driven assembling member is moveable in the direction of the rotational driving axial line.

Image forming apparatus and power transmission unit thereof

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

Provided is a paper detection apparatus for detecting the size of a sheet of paper transferred along a paper transfer path, which includes a light source and an optical sensor. A plurality of light emitting optical fibers are located at a first side of the paper transfer path and receive light radiated by the light source and emit the received light to a plurality of positions in a widthwise direction of the paper. A plurality of light receiving optical fibers are located at a second side of the paper transfer path and guide the light emitted by the light emitting optical fibers toward the optical sensor. A determination unit detects the size of the paper based on the amount of light detected by the optical sensor.

Paper detection apparatus and printing method

An image forming apparatus includes plurality image carriers sequentially arranged, a conveying belt, which conveys a print medium onto which color-separated images formed on the plurality of image carriers are overlapped, and a plurality of image transfer rollers installed to respectively correspond to the plurality image carriers. The conveying belt is interposed between the image transfer rollers and the image carriers. At least one of the plurality image transfer rollers is arranged to be compressed with a pressure higher than those applied to the other image transfer rollers against the image carriers.

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Suwon-si, South Korea

Gi-cheol Jeong