Abstract: Disclosed herein is a symmetric cyclic phosphonate compound represented by the following Formula 1, a method of preparing the same and a flame retardant styrenic resin composition including the same: wherein R1 and R2 are each independently hydrogen, C1-C6 alkyl or C6-C20 aryl. The styrenic resin composition employing the symmetric cyclic phosphonate compound exhibits good flame retardancy and impact strength, does not release halide gas during preparation or combustion of the resin composition, and thus is environmentally friendly.

Abstract: Disclosed herein is a sterically hindered phenolic phosphonate resin compound represented by the following Chemical Formula 1. The present invention also provides a polycarbonate resin composition including the sterically hindered phenolic phosphonate resin compound as a flame retardant. wherein R1 is a C1-C6 alkyl group or a C6-C14 aryl group; each R2 is independently a C1-C6 linear alkyl group or a C3-C6 branched alkyl group; and each n is independently 1-3.

Abstract: A developing apparatus includes a toner collection apparatus having a waste toner accommodation chamber that temporarily accommodates waste toner removed from a photosensitive medium. A screw to transfer the waste toner is installed in the chamber. A collection path connects the waste toner accommodation chamber to a developing chamber that holds new toner to be supplied to the photosensitive medium. Waste toner is delivered through the collection path to the developing chamber. An agitator that agitates the waste toner to prevent the collection path from being clogged is provided. The agitator includes a pivoting body installed in the collection path. One end of the pivoting body selectively contacts the screw. The other end of the pivoting body is connected to an agitating body that is arranged in a lengthwise direction of the collection path. As the screw rotates, the pivoting body pivots, thereby moving the agitating body so that it agitates waste toner in the collection path.

Abstract: Disclosed herein is a flame retardant thermoplastic resin composition having excellent weatherability comprising (A) about 100 parts by weight of a rubber modified aromatic vinyl resin comprising (a1) about 15 to about 100% by weight of a grafted copolymer resin prepared by graft-polymerizing about 5 to 65% by weight of a rubbery polymer, about 10 to 95% by weight of an aromatic vinyl monomer and about 0 to 40% by weight of a monomer copolymerizable with said aromatic vinyl monomer; and (a2) about 0 to 85% by weight of a copolymer resin prepared by polymerizing about 40 to 90% by weight of an aromatic vinyl monomer and about 10 to 60% by weight of a monomer copolymerizable with said aromatic vinyl monomer; (B) about 0.1 to about 10 parts by weight of a ring-shaped alkyl phosphonate ester compound; and (C) about 0.05 to about 3 parts by weight of a HALS compound.

Abstract: A case of a mobile terminal includes a user input unit, a controller for manipulating an input signal, an interface for transmitting the manipulated input signal and protects a mobile terminal.

Abstract: A developing unit for an image forming apparatus using a two-property developer that induces a magnetic attraction force based on the slope of a curved line representing the magnetism of each magnetic pole of a magnetic field generating part of a developing roller and determining a developer-regulating position where the changes of the magnetic attraction force are minor based on the magnetic attraction force in order to assure stable transfer of the developer to a photoconductive medium.

Abstract: A toner/developer mixing roller is rotatably disposed in an inside of a housing to mix a developer with toner supplied into the housing to supply a mixture of the developer and the toner to a developing roller. The toner/developer mixing roller includes a roller body and a sheet of a reticular form rolled around the roller body.

Abstract: A developing unit for an image forming apparatus using a two-property developer that induces a magnetic attraction force based on the slope of a curved line representing the magnetism of each magnetic pole of a magnetic field generating part of a developing roller and determining a developer-regulating position where the changes of the magnetic attraction force are minor based on the magnetic attraction force in order to assure stable transfer of the developer to a photoconductive medium.

Abstract: A developing apparatus includes a toner collection apparatus having a waste toner accommodation chamber that temporarily accommodates waste toner removed from a photosensitive medium. A screw to transfer the waste toner is installed in the chamber. A collection path connects the waste toner accommodation chamber to a developing chamber that holds new toner to be supplied to the photosensitive medium. Waste toner is delivered through the collection path to the developing chamber. An agitator that agitates the waste toner to prevent the collection path from being clogged is provided. The agitator includes a pivoting body is installed in the collection path. One end of the pivoting body selectively contacts the screw. The other end of the pivoting body is connected to an agitating body that is arranged in a lengthwise direction of the collection path. As the screw rotates, the pivoting body pivots, thereby moving the agitating body so that it agitates waste toner in the collection path.

Abstract: A toner/developer mixing roller is rotatably disposed in an inside of a housing to mix a developer with toner supplied into the housing to supply a mixture of the developer and the toner to a developing roller. The toner/developer mixing roller includes a roller body and a sheet of a reticular form rolled around the roller body.

Abstract: A transfer jam detecting apparatus for a wet type electrophotographic color printer capable of detecting various kinds of jams occurring at a transfer roller, including: a printed matter entrance sensor disposed on a front side of a transfer roll, for detecting an entrance of a printed matter into the transfer roll; a feed roll disposed by a shaft to be rotated in either direction on a transfer section printed matter guide disposed on a rear side of the transfer roll, the feed roll being passively rotated by the conveyed printed matter; a pressing roll assembly disposed on an upper portion of the feed roll, for pressing the printed matter in a manner that the feed roll is passively rotated by the conveyed printed matter; and feed roll rotational direction detecting section for detecting the presence of a jam by detecting the rotation and rotational direction of the feed roll.

Abstract: A photoreceptor web installation/removing apparatus of a printer includes a roller unit installed in a main body of the printer and having a frame for supporting both ends of a support roller that supports a photoreceptor web. The installation/removing apparatus further includes a pair of mobile brackets, installed on the frame, for supporting both ends of a tension roller. A belt installation cartridge accommodates a new photoreceptor web to be installed on the roller unit and is capable of being inserted in the main body of the printer to encompass the roller unit. A belt removing cartridge removes the photoreceptor web installed on the roller unit and is capable of being inserted in the main body of the printer. A locking/releasing device selectively locks to and releases from the roller unit, the belt installation cartridge or the belt removing cartridge when inserted in the main body of the printer. A recognition device recognizes the type of belt cartridge inserted in the main body of the printer.

Abstract: A method for adjusting a tension applied to a photoreceptor belt in a printing apparatus includes adjusting the tension applied to the photoreceptor belt according to at least three modes including a normal print mode where tension is applied to the photoreceptor belt for a printing operation by pressing the tension roller in a predetermined direction, a loosened tension mode where the tension to the photoreceptor belt is loosened by decreasing the pressure applied to the tension roller during the suspension of the printing operation, and a belt replace mode where the tension to the photoreceptor belt is released to replace the photoreceptor belt, by releasing pressure applied to the tension roller.

Abstract: A photoreceptor belt control apparatus for a printer having a photoreceptor belt that circulates around rollers rotatably installed on a belt frame. The apparatus includes a pair of auxiliary frames slidably and pivotally installed on the belt frame, and a steering roller whose ends are rotatably installed respectively on the auxiliary frames. The steering roller rotates in contact with the photoreceptor belt. A shaft is rotatably installed on the belt frame, and a cam unit is installed on at least one end of the shaft for controlling the inclination of the steering roller by pivoting each of the auxiliary frames according to the rotational position of the shaft. A tension control unit controls the tension in the photoreceptor belt by sliding the pair of auxiliary frames.

Abstract: A photoreceptor web grounding structure of a liquid electrophotographic printer for grounding a photoreceptor web installed in the printer, the structure includes a removable cartridge detachably installed in the printer, a first grounding brush installed at the removable cartridge and contacting the photoreceptor web, and a second grounding brush installed at a main frame to be in contact with the first grounding brush when the removable cartridge is installed in the printer. Thus, the first grounding brush installed at the removable cartridge is also replaced when the photoreceptor web is replaced so that replacement process due to contamination of the grounding brush can be very easily done.

Abstract: A clothes washing machine has a motor which includes a stator, and a rotor disposed around the stator. The rotor includes a disk-shaped plate having radial blades disposed on an upper surface thereof. The blades are situated beneath the stator and generate a flow of turbulent cooling air along the stator in response to rotation of the rotor.

Abstract: An apparatus for driving a photosensitive belt is applied to an electrophotographic printer in which a continuously moving photosensitive belt is scanned by an optical beam, thereby forming a latent image on the photosensitive belt for a developer liquid to be applied. The apparatus for driving the photosensitive belt includes a photosensor, a controller and a stepping motor. The photosensor is installed at a position near to the rear end of the scanning area for generating a pulse signal whenever a unit scan line of the photosensitive belt has been completely scanned by the optical beam. The controller processes the pulse signal and drives the stepping motor to rotate a predetermined angle to thereby move the photosensitive belt a unit scan line distance whenever the driving pulse signal from the controller is applied thereto. In this way, the speed of the photosensitive belt will not be excessive so as to prevent complete scanning of each scan line of the optical beam.

Abstract: A washing machine includes a water tub, a spin basket mounted inside the water tub, a pulsator mounted in the spin basket, a reversible motor mounted under the water tub for driving the pulsator and spin basket, and a damping device for damping external impacts applied to the motor. The damping device is mounted to an underside of the motor and is received in a recess formed in an upper end of a cushioning member disposed beneath the machine during shipment to stabilize the motor.

Abstract: A brushless motor for driving a washing machine includes a stator fixed to a frame and having a shaft holder with a hollow portion and a yoke wound by a coil; a rotor having a shaft rotatably supported within the hollow portion of the shaft holder; and a flange having a passing hole connected to an upper portion of the shaft holder. The shaft protrudes from the upper portion of the shaft holder and includes a stepped portion having a diameter larger than that of the passing hole.

Abstract: A washing machine includes a water tub, a spin basket mounted inside the water tub, and a pulsator mounted in the spin basket. A drive transmission includes a hollow dehydrating shaft and a laundering shaft disposed coaxially therein. The hollow dehydrating shaft is connected to the spin basket, and the laundering shaft is connected to the pulsator. A connecting gear is mounted on the dehydrating shaft for vertical movement therealong. In an upper position, the connecting gear meshes with fixed teeth to prevent the spin basket from rotating. In a lower position, the connecting gear causes the laundering shaft and dehydrating shaft to be interconnected for common rotation. The connecting gear is rotatable slightly relative to the laundering shaft to accommodate meshing of gear teeth in response to upper and lower movement of the connecting gear. Springs are provided which act between the dehydrating shaft and the connecting gear and which are yieldable to permit the slight rotation of the connecting gear.