Abstract: An image forming apparatus and a sensing device thereof. The sensing device includes a sensor, and a cleaning unit adapted to be operated by a moving printing medium and used to clean the sensor. The sensing device is operable according to delivery of a printing medium, to remove pollutants attached to the sensor.

Abstract: An image forming apparatus includes a photosensitive body on which an electrostatic latent image is formed, an exposure device to irradiate light to the photosensitive body to form the electrostatic latent image, a developing device to adhere a developer to the photosensitive body to form a visible image, a transfer device to transfer the visible image formed on the photosensitive body onto a printing medium, and a fusing unit to fuse the visible image to the printing medium. The fusing unit includes a heating roller to apply heat to the printing medium, a press roller to contact the heating roller to press the printing medium, a press lever to press any one of the heating roller and the press roller to the other, an adjusting lever rotatably coupled to the press lever, and a pressing force adjusting device to operate the adjusting lever to move the press lever.

Abstract: A multi-function peripheral including: a printing portion; a scanning portion reading an image from a document; a discharge portion disposed between the printing portion and the scanning portion, and loading sheets of print media on which images are formed; and a finisher installed on the discharge portion to post-process the print media, on which the image is formed. The finisher includes: a plurality of fixing units including a first fixing portion disposed on a lower portion of the finisher in order to prevent the finisher from moving upward and a second fixing portion that can rotate so as to prevent the finisher from moving in an attaching direction on the discharge portion.

Abstract: An image forming apparatus and a sensing device thereof. The sensing device includes a sensor, and a cleaning unit adapted to be operated by a moving printing medium and used to clean the sensor. The sensing device is operable according to delivery of a printing medium, to remove pollutants attached to the sensor.

Abstract: An image forming apparatus includes a photosensitive body on which an electrostatic latent image is formed, an exposure device to irradiate light to the photosensitive body to form the electrostatic latent image, a developing device to adhere a developer to the photosensitive body to form a visible image, a transfer device to transfer the visible image formed on the photosensitive body onto a printing medium, and a fusing unit to fuse the visible image to the printing medium. The fusing unit includes a heating roller to apply heat to the printing medium, a press roller to contact the heating roller to press the printing medium, a press lever to press any one of the heating roller and the press roller to the other, an adjusting lever rotatably coupled to the press lever, and a pressing force adjusting device to operate the adjusting lever to move the press lever.

Abstract: An image forming apparatus comprises a main body having a mounting portion and a sensing portion disposed on one sidewall of the mounting portion. A developing unit assembly has a plurality of developing units and a contacting portion is disposed on one of the developing units. The contacting portion selectively contacts the sensing portion. The bottom surface of the mounting portion is declined to block the contacting portion from contacting the sensing portion prior to the installation of all of the developing units on the mounting portion. The angle of the bottom surface becomes larger when going towards the interior of the mounting portion. The contacting portion is installed on only one developing unit, but whether the other developing units are mounted can be sensed by using the contacting portion, thereby avoiding the use of multiple contacting portions. An image forming apparatus fabricated with this structure is smaller, simpler, and has reduced manufacturing costs.

Abstract: A multi-function peripheral including: a printing portion; a scanning portion reading an image from a document; a discharge portion disposed between the printing portion and the scanning portion, and loading sheets of print media on which images are formed; and a finisher installed on the discharge portion to post-process the print media, on which the image is formed. The finisher includes: a plurality of fixing units including a first fixing portion disposed on a lower portion of the finisher in order to prevent the finisher from moving upward and a second fixing portion that can rotate so as to prevent the finisher from moving in an attaching direction on the discharge portion.

Abstract: A paper arranging device includes a driving roller and an idle roller disposed adjacent to each other to form a nip, a first sensor to sense a location of moving paper, and a lever having a first end which extends to a perimeter of the nip to block a tip of the paper moving toward the nip and the other end which extends to a perimeter of the sensor, the lever being rotatable with respect to a predetermined pivot axis between the first end and the second end of the lever. When the first end of the lever is pressed by the tip of the moving paper and reaches a first position, the first sensor determines that the tip of the paper is entering the nip and generates a first sensing signal. When the first end of the lever is pressed by the tip of the moving paper and reaches a second position at which the paper has proceeded farther than at the first position, the first sensor determines that the tip of the paper passes through the nip and generates a second sensing signal.

Abstract: An image forming apparatus comprises a main body having a mounting portion and a sensing portion disposed on one sidewall of the mounting portion. A developing unit assembly has a plurality of developing units and a contacting portion is disposed on one of the developing units. The contacting portion selectively contacts the sensing portion. The bottom surface of the mounting portion is declined to block the contacting portion from contacting the sensing portion prior to the installation of all of the developing units on the mounting portion. The angle of the bottom surface becomes larger when going towards the interior of the mounting portion. The contacting portion is installed on only one developing unit, but whether the other developing units are mounted can be sensed by using the contacting portion, thereby avoiding the use of multiple contacting portions. An image forming apparatus fabricated with this structure is smaller, simpler, and has reduced manufacturing costs.

Abstract: Disclosed is an apparatus for guiding a paper for printing, which includes guide arms for guiding the paper carried between a transferring device and a fixing device. In the apparatus for guiding the paper for printing, the guide arms are mounted and spaced at a width of the paper from each other between the transferring device and the fixing device so as to guide the paper with being in contact with non-image portions of which a surface of the paper has an image formed thereon.

Abstract: A guider assembly for a rotary component idles about a given point on a shaft, and the shaft has a race at both sides of an idling space in which the rotary component is turned. A guider of the assembly has tension ribs held in the race for allowing the rotary component to idle about a predetermined point on the shaft. In addition, in the inventive guider assembly, the shaft has a race formed at both sides thereof and on a part of its outer surface, and the guider has a shaft hole into which the shaft fits, and tension ribs formed at one side of the shaft hole and held in the race.