Abstract: A paper feeding apparatus in an image forming apparatus including a paper-entering angle varying portion disposed in a frame to vary the angle of a leading end of a sheet entering a paper separating member according to the thickness or stiffness of the paper being fed. The paper-entering angle varying portion includes a paper leading end bending guide formed on the bottom surface of the frame in which paper is stacked. The paper feeding apparatus can prevent a paper feed problem, for example, multi sheet feed or a sheet feed failure by varying the paper-entering angle using the paper leading end bending guide when the paper is picked up according to the stiffness of the paper being fed.

Abstract: A sheet feeding apparatus of an ink-jet printer includes a cassette to accommodate sheets of paper detachably provided in a main body of the printer, a pickup roller rotating in close contact with the paper accommodated in the cassette to have the paper enter into the main body, and a buffer member to prevent damage of a pickup roller portion occurring when the pickup roller continuously performs a pickup operation when no paper remains in the cassette. The buffer member includes a guide portion provided in the cassette, a stop portion protruding from sides of the cassette to support end portions of the pickup roller when no paper remains in the cassette, a pad installed between the stop portion and the guide portion to slide, and an elastic unit to apply a restoration force pad opposite to a direction in which the paper is supplied into the main body of the printer.

Abstract: A carriage aligning apparatus in an ink-jet printer having a guide bar and a carriage disposed to slide along the guide bar to be across a paper transferring direction includes a spherical bearing rotatably connected to the carriage, a shaft hole formed eccentrically with respect to a center of an outer circumference of the spherical bearing to receive the guide bar, and a position deciding unit controlling a position of the spherical bearing with respect to the carriage and aligning the carriage with regard to the guide bar.

Abstract: A sheet feeding apparatus of an ink-jet printer includes a cassette to accommodate sheets of paper detachably provided in a main body of the printer, a pickup roller rotating in close contact with the paper accommodated in the cassette to have the paper enter into the main body, and a buffer member to prevent damage of a pickup roller portion occurring when the pickup roller continuously performs a pickup operation when no paper remains in the cassette. The buffer member includes a guide portion provided in the cassette, a stop portion protruding from sides of the cassette to support end portions of the pickup roller when no paper remains in the cassette, a pad installed between the stop portion and the guide portion to slide, and an elastic unit to apply a restoration force pad opposite to a direction in which the paper is supplied into the main body of the printer.

Abstract: In the present invention, a reference block data within a current image from which a motion vector will be obtained and corresponding search region data within reproduced previous image are stored in a reference block and a search region data memory, respectively. A motion vector of two pixels unit is performed using the reference block and the search region data stored in the memory, thus resulting in obtained a motion vector of two pixels unit. At this time, the reference block and the search region data are used by performing 2:1 sampling in a horizontal direction and a vertical direction, respectively and the search range is −7˜+7. The structure of the motion search is consisted of a memory for storing a reference block (8×8) of current images and a memory (24×8) for storing a search region storing reproduced previous images.