Samsung Electronics Co., Ltd.

Korea Advanced Institute of Science and Technology

Samsung General Chemicals, Co., Ltd.

S-printing Solution Co., Ltd.

Young-soo Ko

Kwang-hyuck So

Seong-Ihl Woo

Ki-Su Ro

Yong Chun

Young-Jun Lee

An image forming apparatus is provided, which includes an image forming apparatus main body, and first and second toner containers mounted in the image forming apparatus main body, wherein the first and second toner containers are respectively mounted in first and second toner container mounting grooves that are concavely formed from a housing portion of the image forming apparatus main body.

Image forming apparatus and container mounting groove thereof

An image forming apparatus includes: an image forming part which picks up a recording medium at a predetermined pickup timing and forms an image at a predetermined printing speed; and a controller which accelerates the timing for picking up the recording medium in advance of the predetermined pickup timing, and which lowers the printing speed so as to allow the printing operation to take place at a lower fusing temperature during warming up from a cold start in order to shorten the first print output time (FPOT).

Image forming apparatus and control method thereof

A medium supplying unit and an image forming apparatus having the same. The medium supplying unit includes a cassette frame to be mounted to or detached from a main body frame, a loading plate to load a printing medium, and is disposed adjacent to the cassette frame to move between a supplying position and a standby position, and a locking assembly. The locking assembly includes an engagement unit disposed adjacent to the loading plate and a locking unit, the locking unit including a stationary end extending from the cassette frame, and a free end to lock the engagement unit if the loading plate is positioned in the standby position, and to move the free end in a direction to unlock the engagement unit by applying a pressing force so that the loading plate can move to the supplying position when mounting the cassette frame.

Medium supplying unit and image forming apparatus having the same

An image forming apparatus having a print roller, in which a circumferential elastic contact part of the print roller contacts and presses a print medium to convey the print medium, the apparatus comprises a push roller pressing the print roller to elastically deform the circumferential elastic contact part; and a print media-releasing member including a claw member to be protruded into a space formed by the elastic deformation of the circumferential contact portion, the print medium being released from the print roller by means of the claw member.

Image forming apparatus having print media-releasing member and fusing apparatus having same

Described herein is a prepolymerized catalyst encapsulated with macromolecular monomers which is prepared by adding olefin mononers and diene compounds to a solid complex titanium catalyst for olefin polymerization and then polymerizing, and also relates to a method for polymerization or copolymerization capable of preparing polyolefins with high melt strength by polymerizing the olefin by using said catalyst.

Catalysts for olefin polymerization and method of olefin polymerization using the same

The present invention provides a process for preparing a highly active metallocene catalyst by which polyolefin having improved properties can be prepared with a small amount of cocatalyst. A process for preparing a metallocene catalyst of the invention comprises the steps of: modifying the surface of a zeolite or molecular sieve inorganic carrier possessing crystalline pores of 7 to 100 .ANG. size by the addition of an organic solvent and organic aluminum compound under an environment of inert gas and reacting at a constant temperature, and drying; and, impregnating a metallocene compound into the inorganic carrier by the addition of an organic solvent and said metallocene compound, whose diameter is smaller than the diameters of said pores of the inorganic carrier, to the inorganic carrier and reacting at a constant temperature, and drying. In accordance with the present invention, a highly active metallocene catalyst can be prepared in an economical and efficient manner.

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Seoul, South Korea

Young-soo Ko