Samsung Electronics Co., Ltd.

Dong-hyup Shin

Hyun-Soo Kim

Bong-Hwan Choi

An image forming apparatus includes a main body including a printing unit for printing an image on a recording medium and a pickup roller for picking up the recording medium, a paper feeding device, which includes an elevatable knock-up plate on which recording media are stackable and a pressure member for elastically pressing the knock-up plate towards the pickup roller and is removably inserted into the main body, and a variable guide unit, which is supported by the main body, is fixed in a slope state to lower the knock-up plate in a direction against the pickup roller when the paper feeding device is withdrawn from the main body, and moves to maintain a contact state with the knock-up plate due to a rising state of the knock-up plate in a state in which the paper feeding device is inserted into the main body.

Image forming apparatus

A medium supply unit of an image forming apparatus, the medium supply unit may include: a main body housing; a tray connected to the main body housing and loading a printing-target medium therein; an activating shaft connected to the main body housing and being rotated in a predetermined direction by an activating force of an activating source; an intermediate member supported by one end of the activating shaft to deliver a rotating force of the activating shaft; a first elastic member having one end connected to the intermediate member and the other end supported by the activating shaft; and elastically biasing the intermediate member in a direction facing the printing-target medium according to a rotation of the activating shaft; and a roller unit having a roller unit housing that is attachable to the intermediate member and at least one roller that is supported by the roller unit housing and picks up and supplies printing-target media loaded in the tray; and configured to deliver to the roller(s) an elastic force of the first elastic member and a rotating force of the activating shaft when the activating shaft is rotated.

Medium supply unit and image forming apparatus having the same

An image forming apparatus is provided with a laser scanning unit having at least two laser diodes to form an electrostatic latent image on a photosensitive body with laser beams emitted from the laser diodes; an engine driving unit having at least one driving motor to drive a plurality of built-in units; and a control unit arranged to control one of the laser scanning unit and the engine driving unit so as to adjust a process speed of the engine driving unit or a scan speed of the laser scanning unit with a certain rate depending on a selected resolution in order to enhance a resolution of an image.

Growing community of inventors

Seongnam-si, South Korea

Dong-hyup Shin