Samsung Electronics Co., Ltd.

Hewlett-Packard Development Company, L.p.

Jae Wuk Lee

Je Won Jeong

Sang Cheol Kim

Jin Soo Lee

Myung Hun Oh

Sungchang Hur

Uichoon Lee

Myung Soo Jeong

Wootan Son

An example print medium supplying apparatus includes a print medium transporting device to pick up a print medium loaded in a loading portion and transport the picked-up print medium, a print medium alignment portion to align a leading end of the transported print medium, a first sensor to sense the print medium that passes through a feed roller of the print medium transporting device, and a processor to, based on a measured value with respect to the print medium sensed by the first sensor and a multi-feeding determination reference value corresponding to a sheet of the print medium, detect multi-feeding of the print medium and process the detected multi-feeding by controlling the print medium transporting device and the print medium alignment portion.

Detecting and processing multi feeding

An image forming apparatus and a method of controlling the same capable of obtaining the same effect as when sheets of paper are picked up in such a state that front ends thereof are all aligned by controlling paper feeding based on results of detecting paper movement and capable of improving feeding speed by maintaining a time taken for the sheet of paper to move to a feed roller constant are provided. The apparatus includes a pick-up roller to pick up a sheet of paper, a forward roller to feed the picked-up sheet of paper toward a downstream side of a paper moving path, a feed roller to feed the sheet of paper fed by the forward roller toward the downstream side of the paper moving path, and a feed sensor mounted between the forward roller and the feed roller to detect movement of the sheet of paper.

Image forming apparatus and method of controlling the same

A printing medium supply device and an image forming apparatus having the same are provided. The printing medium supply device may include a pickup unit and an adjustment unit. The pickup unit may include a shaft, a pickup roller spaced apart from the shaft to come into contact with printing media, a pickup holder to support the pickup roller, the pickup holder being rotated about the shaft to lift or lower the pickup roller, and a link member connected to the pickup holder so as to be rotated about the shaft. The adjustment unit may include a pressure member coming into contact with a pressure applied portion of the link member to rotate the link member by applying pressure thereto, and an elastic member elastically supported by the pressure member to transmit elastic force to the link member. This configuration ensures constant pickup pressure despite variation in the quantity of printing media.

Printing medium supply device and image forming apparatus having the same

A sheet feeding device selectively transmit a driving force transmitted to a double gear type driving gear to a first reverse gear to rotate a retard roller in a direction opposite to a rotation direction of a forward roller such that various kinds of sheets having different friction forces are separated and supplied, and an image forming apparatus including the same.

Sheet feeding device and image forming apparatus including the same

A print medium finishing apparatus is provided. The apparatus includes a conveyance module configured to convey print media on a first tray to a second tray. Since a rotary member of the conveyance module is rotated to support the print media on the first tray during a process in which the conveyance module passes through a through-hole formed in a support section of a main body to move over the first tray, disorder of the print media is reduced during a process of conveying the print media to the second tray.

Growing community of inventors

Suwon-si, South Korea

Jae Wuk Lee