baber/WOPTO huggingface dataset:
Patent KR-20030015177-A (KR)
Title: Car side molding and manufacturing method
Inventor: LEE SE HO
IPC: B60R13/04
Filed: 2002-12-12
Abstract: PURPOSE: A side molding for a vehicle and producing method for the side molding is provided to form minimum thickness on a mount portion and to simplify a mold structure by a clip in covering process for a rib. CONSTITUTION: A side molding for a vehicle has two mount types to fix a clip(2). The side molding of a slide mount type forms slide mounts to inside integrally when injection molding of the side molding. An installing sill(5) is formed to support the clip after installing to inside. Three covering ribs(6) and a position fixing stopper(7) are formed to outside the installing sill. The side molding of a boss mount type forms a tubular rib. An inserting end portion of the clip is inserted to the rib. An upper portion of the rib becomes transformable state by hot blast. The clip is fixed to the inside of the side molding by vending inside and cooling the upper portion of the rib. Consequently, the clip is fixed by a covering process instead of deleting undercut on the mount portion. Also, sink, weld lines, flow mark and wave are prevented.
Patent KR-20040055531-A (KR)
Title: The manufacture of log members for wood housing and the method of building a frame.
Inventor: SUNG NAK YEONG
IPC: E04B1/26
Filed: 2002-12-21
Abstract: PURPOSE: A manufacturing method of a log structural member for a wooden house is provided to shorten a period of installation for a wooden structure, to decrease the cost required for installation and to make a strong structure against earthquake and impact. CONSTITUTION: The manufacturing method of a log structural member for a wooden house is completed by interposing/fixing a fixing bolt(17) and a connecting nut(8) to both ends of logs(1,11) to couple logs(11) for a horizontal beam, a log(31) for a roof beam, a main column, and etc. on a log(1) for a column structurally.
Patent KR-20040056038-A (KR)
Inventor: KIM SANG GU
IPC: H01L21/50
Filed: 2002-12-23
Abstract: PURPOSE: A leadframe magazine holder is provided to receive various kinds of magazines by improving the structure of a magazine holder used in a process for fabricating a semiconductor package. CONSTITUTION: The leadframe magazine holder(50) receives a magazine into which leadframes are loaded. The first magazine into which the first leadframe is loaded is received in a space defined by the inner sidewall of the magazine holder and the first support part(51) under the inner sidewall. The second support part(52) is stepped toward a bottom surface in the center of the first support part. The second magazine into which the second leadframe is loaded is received in a space defined by the second support part stepped toward the lower part of the first support part and the wall of the first support part.
Patent KR-20040056262-A (KR)
Title: A device for preventing the skull of melt surface in twin roll srip casting
Inventor: HA MAN JIN
IPC: B22D11/114
Filed: 2002-12-23
Abstract: PURPOSE: An apparatus for preventing skull of molten steel in twin roll strip caster is provided to minimize formation of skull at the nozzle, suppress growing of the skull to the utmost, improve quality of casting slab, secure stability of casting operation and protect casting facility by vibrating tundish for supplying molten steel through a nozzle. CONSTITUTION: The apparatus(1) comprises a tundish car comprising a car main body moved back and forth by driving force of traveling motor to transfer tundish to a part that is directly above casting rolls, a moving block lifted and lowered in vertical guider of the car main body by driving force of a vertical moving motor, a pair of arms(127a,127b) one end of which is rotationally assembled into the moving block, and to which both sides of the tundish are locked, and a rotational cylinder for rotationally operating the arms; an upper catching bracket(31) which is mounted on a lower surface of horizontal plate integrally mounted on both surfaces of the tundish, and on a lower part of which a concave groove(31a) is formed; a lower catching bracket(32) equipped with a catching pin(32a) inserted into the concave groove and put on an upper surface of vibration plate(33); a resting base(34) on an upper surface of which an insertion part(34a) is sunk to a certain depth so that a projection part(33a) projectingly formed downward to a certain length on a lower surface of the vibration plate is vertically movably inserted into the insertion part, and which is integrally put on an upper surface of the arms; and a cylinder(35) comprising a rod(35a) an upper end of which is always contacted with a lower surface of the projection part by passing through a through hole(34b) of the insertion part so that the rod transmits vertical vibration to the projection part, wherein the rod is received in a mounting hole(38) sunk into an upper surface of the arms.
Patent KR-20040056313-A (KR)
Title: Center Position Contrlling Apparatus for Strip in Continued Furnace
Inventor: BYUN BYEONG UN
IPC: C21D9/673
Filed: 2002-12-23
Abstract: PURPOSE: A strip center position control system is provided which is further equipped with an apparatus capable of preventing skewness of the strip even during breakdown of center position control system for adjusting position of heated strip passing through continuous annealing furnace. CONSTITUTION: The strip center position control system in continuous annealing furnace comprises resistance converters(10a,10b) for detecting position of electric powered cylinders(2a,2b); current converters(11a,11b) for converting resistance values inputted from the resistance converters into corresponding current values; 1a and 1b switches(13a,13b) changed to input a signal inputted from the current converters or a signal inputted from position transmitters(3a,3b) into digital controller(5); a distribution control unit(12) in which system control program is embedded, and which outputs switch change signal; a servo driver signal control circuit(14) for outputting a signal for controlling servo drivers(4a,4b) by the signal from the distribution control unit; and 2a and 2b switches(15a,15b) changed to input the signal of the servo driver signal control circuit or the signal from the digital controller into the servo drivers.
Patent KR-20040057685-A (KR)
Title: Connecting structure of suction tube for hermetic compressor
Inventor: KIM JONG MOK
IPC: F04B39/12
Filed: 2002-12-26
Abstract: PURPOSE: An intake pipe combining structure of a hermetic compressor is provided to prevent the leakage of a refrigerant by directly press-fitting and fixing an L-shaped tube to an intake hole of a cylinder and to reduce the material cost and the manufacturing process by removing members used for combining an intake pipe. CONSTITUTION: An intake pipe combining structure of a hermetic compressor is composed of a cylinder(131) mounted with an intake hole(136) penetrating one side wall to communicate with an inner compression space; a closed container(110) for receiving the cylinder and including an inserting hole(111) communicating with the intake hole; and an L-shaped tube(160) of which one end penetrates and combines with the bottom side of an accumulator and the other end is directly press-fitted and fixed to the intake hole through the inserting hole to supply the vapor-liquid separated refrigerant gas into the compression space of the cylinder.
Patent KR-20040059515-A (KR)
Title: Combined ATC
Inventor: SONG JAE HO
IPC: B61L3/20
Filed: 2002-12-27
Abstract: PURPOSE: An integrated ATC(Automatic Train Control) system is provided to reduce the manufacturing cost by integrating a receiver and a level monitoring board. CONSTITUTION: A speed indication code process/transmission unit(100) performs a PWM process for an ATC signal and receives and processes a condition of an adjacent track or an interlock condition. An input board unit(200) receives a track signal from the speed indication code process/transmission unit and matches and filters the received signal. An attenuation unit(300) filters the track signal, sets up a predetermined reception level, and displays the reception level. A reception unit(500) decides the presence of a train by using the track signal, an ATC ASPECT condition of the speed indication code process/transmission unit, and each output level of TAPs. A level monitoring unit(400) decides a state of a transmission level and a state of a speed indication code by analyzing a level monitoring signal, each output level of TAPs, and the speed indication code information.
Patent KR-20040058945-A (KR)
Title: Vehicular height adjusting shock absorber
Inventor: BAEK JONG HYEON
IPC: B60G17/048
Filed: 2002-12-27
Abstract: PURPOSE: A vehicle height-adjusting shock absorber is provided to cut down the cost than an existing method adopting an expensive pump tube by simplifying the structure of a pumping unit for adjusting the vehicle height. CONSTITUTION: A vehicle height-adjusting shock absorber is composed of a base shell(52); an inner tube(54) installed in the base shell; a blade(62) and an outer tube(64) perpendicularly arranged between the base shell and the inner tube to form a gas chamber(56), a base chamber(58), and a high pressure chamber(60); a piston rod(70) mounted in the inner tube and formed with a hollow unit of which the upper part is closed; a piston valve(72) combined to the end of the piston rod by a nut(74) to divide the inner part of the inner tube into a rebound chamber(76) and a compression chamber(78); a pump rod(80) of which the lower end is fixed to the outer tube, installed with a check valve(82) at the upper end, and formed with the hollow unit combined to the hollow unit of the piston rod to form a pump chamber(84); a plurality of eject holes arranged to the nut to adjust the vehicle height by ejecting oil in the pump chamber in compression motions through a passage for the rebound side of the piston valve into the compression chamber; and a seal for high pressure disposed between the nut and the piston rod to keep airtightness.
Patent KR-20040061192-A (KR)
Title: High antitracking and high flow polyester resin composite
Inventor: JUN YEONG SEON
IPC: C08L67/00
Filed: 2002-12-30
Abstract: PURPOSE: A thermoplastic polyester resin composition is provided, to improve tracking resistance with minimizing the deterioration of fluidity. CONSTITUTION: The polyester resin composition comprises 100 parts by weight of a polyester resin as a base resin; 2-7 parts by weight of a tri- or more valent novolac epoxy resin represented by the formula 1; and 2-15 parts by weight of zinc borate as a flame retardancy adjuvant, wherein R1, R2 and R3 are identical or different one another and are H, CH3 or OH; and n is a repeating unit and is an integer of 3 or more. Preferably the polyester resin comprises 90 mol% or more of the polyester represented by the formula 2, wherein n is a repeating unit and is an integer of 50-300; and m is an integer of 2-4.
Patent KR-20040060538-A (KR)
Title: Lead frame coated with selective softening nickel and producing procedure thereof
Inventor: HAM TAE HWA
IPC: H01L23/48
Filed: 2002-12-30
Abstract: PURPOSE: A semiconductor lead frame using a selective soft nickel plating method and a fabricating method thereof are provided to reduce largely the manufacturing cost by forming a soft nickel layer instead of a silver layer. CONSTITUTION: A semiconductor lead frame using a selective soft nickel plating method includes a metallic substrate layer, a copper layer, and a soft nickel-plated layer. The metallic substrate layer(31) is formed with a copper layer or a copper alloy layer or a nickel-steel alloy layer. The copper layer(32) is formed on an upper surface of the metallic substrate layer. The soft nickel-plated layer(33) is formed on an upper surface of the copper layer.
Patent KR-20040061286-A (KR)
Title: Hybrid heat exchanger having tec and heat pipe
Inventor: LEE DONG GYU
IPC: H05K7/20
Filed: 2002-12-30
Abstract: PURPOSE: A hybrid heat exchanger is provided to reduce a power consumption by maintaining the desired temperature even without operating a TEC(thermo-electric cooler) at a low temperature and a room temperature. CONSTITUTION: A hybrid heat exchanger comprises an inner fan(10) arranged in the intermediate portion of a container, and which circulates heat; a TEC(20) arranged in the center of the top of a container wall(100), and which cools heat in the container by using endothermic and exothermic effects when current flows; heat sinks(30) arranged on the inner and outer surfaces of the top of the container wall and the TEC, and which has a plurality of heat radiation fins(31) for enhancing heat transfer and cooling effects; a heat pipe(40) arranged from the heat radiation fin disposed inside of the container to the heat radiation fin disposed outside of the container, penetrating through the container wall, wherein the heat pipe transfers or discharges heat from the container; and an outer fan(50) arranged over the container, and which discharges heat from the heat pipe to the outside.
Patent KR-20040061975-A (KR)
Inventor: BAEK MIN SU
IPC: F23C10/18
Filed: 2002-12-31
Abstract: PURPOSE: A fluidizing nozzle with a flow guide for a circulating fluidized-bed combustor is provided to reduce the power loss of a forced draft fan, and minimize dead zone between the nozzles. CONSTITUTION: A fluidizing nozzle for a circulating fluidized-bed combustor is composed of a nozzle body(1) having a circular threshold and a pipe-shaped flow guide, and a nozzle hood(2). The top of the nozzle hood is closed. A plurality of channels are formed at the lower part of the nozzle hood.
Patent KR-20020025954-A (KR)
IPC: D04B15/48
Filed: 2000-07-06
Abstract: 본 발명은 얀(yarn)을 제어하는 하나 또는 두개의 얀 필러 레버(27, 28; yarn feeler lever)를 구비한 얀 공급기에 관한 것이다. 필러 정지부(71)는 필요에 따라 상기 제어를 중지시킬 수 있도록 하기 위해 제공된다. 상기 필러 정지부의 조작 소자(75; 핸들)는 조작자가 용이하게 조작할 수 있도록 베이스 바디 또는 얀 공급기의 외부 단부상에 배열된다. 또한, 상기 핸들의 위치는 조절 위치가 용이하게 인식되도록 할 수 있다.
Patent KR-20020047185-A (KR)
IPC: C07D409/04
Filed: 2000-09-13
Abstract: 당단백질 IbIX 길항제로서의 화학식 I의 퀴나졸리논: 
     [화학식 I] 
     
       
     
     (단, 상기 식에서, R, R 1 , R 2 , R 3 , R 4 , Y, n 및 m은 특허청구범위 제 1항의 의미를 가진다) 및 이의 염 또는 용매화합물.
Patent KR-20020092918-A (KR)
Title: 레티클 보호용 제거 가능한 덮개, 이를 포함하는 시스템및 이를 사용하는 방법
IPC: G03F7/20
Filed: 2000-10-04
Abstract: 리소그래피 시스템에서 사용되는 레티클을 보호하기 위한 제거 가능한 덮개가 기술된다.  제거 가능한 덮개는 프레임과 그 프레임에 의해 지지되는 막을 포함한다.  막은 검사 파장을 통과시키므로, 레티클은 제거 가능한 덮개가 위치한 채로 검사될 수 있다.  제거 가능한 덮개는 제거 가능한 덮개가 위치한 때 레티클을 보호하고, 리소그래픽 노광을 위해 제거 가능하다.  제거 가능한 덮개는 레티클에 힘을 인가하는 적어도 하나의 레티클 체결구를 더 포함하므로, 제거 가능한 덮개가 위치한 때 레티클에 대한 제거 가능한 덮개의 상대적 이동을 방지한다.  복수개의 체결구는 제거 가능한 덮개와 레티클의 위치 선정과 고정에 사용된다.  리소그래피를 수행하는 방법과 리소그래픽 시스템이 또한 기술된다.
Patent KR-20020062938-A (KR)
Title: 리튬 니오베이트 및 리튬 탄탈레이트의 전처리된 결정 및이들의 제조 방법
IPC: C30B33/02
Filed: 2000-11-06
Abstract: 리튬 니오베이트 및 리튬 탄탈레이트의 결정을 의도적으로 전기 전도성을 감소시키기 위하여 전처리 하여 결정에 표면 충전을 감소시키는 증가된 능력을 부여한다.  표면 충전을 감소시키는 것은 결정이 불운하게 방전하고, 결정이 포함된 장치의 성능에 부정적 영향을 미치는 것을 감소시킨다.
Patent KR-20020060224-A (KR)
IPC: G02B21/00
Filed: 2001-09-11
Abstract: 섹셔닝효과를 얻는 공초점 디스크를 통해서 조명광을 시료에 조사하고, 이 시료로부터의 빛을 상기 공초점 디스크를 통해서 광전변환수단에 결상시키는 공초점 현미경은 상기 공초점 디스크의 상을 상기 시료에 결상시키는 결상렌즈와 저배율의 대물렌즈를 갖는 대물 결상광학계와, 상기 결상렌즈를 광축 방향으로 이동시키는 결상렌즈 구동수단을 구비한다.
Patent KR-20020060769-A (KR)
Title: 생분해가능한 친수성 결착 섬유
IPC: D01F8/14
Filed: 2000-11-30
Abstract: 본 발명은 생분해가능한 친수성 결착 섬유에 관한 것이다.  이러한 섬유들은 공용융 지방족 폴리에스테르 코어 재료를 고습윤성 지방족 폴리에스테르 블렌드와 함께 공방사시킴으로써 제조될 수 있다.  고습윤성 지방족 폴리에스테르 블렌드는 폴리부틸렌 숙시네이트 중합체, 폴리부틸렌 숙시네이트-코-아디페이트 중합체, 폴리카프로락톤 중합체, 이들 중합체의 혼합물, 또는 이들 중합체의 공중합체로 구성된 군으로부터 선택된 지방족 폴리에스테르 중합체; 멀티카르복실산; 및 습윤제의 미반응 혼합물을 포함한다.  생분해가능한 친수성 결착 섬유는 상당한 생분해성 특성을 나타내지만 쉽게 가공된다.  생분해가능한 친수성 결착 섬유는 체액과 같은 유체의 흡수용으로 의도된 일회용 흡수 제품에 사용될 수 있다.
Patent KR-20020077490-A (KR)
IPC: G11B20/10
Filed: 2001-12-10
Abstract: 디지털 레코딩들의 불법 복사(illicit copying) 및 프로세싱을 방지하기 위한 시스템 및 방법에 관한 것이다. 특히, 시스템은 보호 체계(protection scheme)를 파기(defeat)하기 위해 디지털 레코딩들의 프래그먼트들(fragments)과 함께 병합(merging)과 스티칭(stitching)을 저지한다. 이것을 성취하기 위해, 본 발명은 디지털 레코딩들을 병합하기 위한 시스템(31)을 갖는 컴플리언트 장치(compliant device)(26)를 제공하고 제 1 디지털 레코딩 및 제 2 디지털 레코딩을 수신하기 위한 시스템과; 제 1 디지털 레코딩 및 제 2 디지털 레코딩과 출력(54)을 병합하기 위한 시스템을 포함하고, 상기 출력은 제 1 디지털 레코딩과 제 2 디지털 레코딩 사이에 분열을 포함한다. 프래그먼트들(fragments)과 함께 스티치된 레코딩 시도들은 이와 같이 결과로서 분열들을 갖는 출력된 레코딩이 될 것이고, 재생(playback)하는 동안 빈번한 방해 및 지나친 변동의 원인이 될 것이다.
Patent KR-20030005225-A (KR)
IPC: A61K31/7068
Filed: 2001-03-13
Abstract: 본 발명은 대수술을 겪었거나 또는 급성 허혈성 질환을 겪을 위험이 있는 환자들에 있어서 씨디피-콜린을 이용한 뇌 허혈 예방 치료에 관해 기술한다.
Patent KR-20020093113-A (KR)
Title: 디스플레이 디바이스
IPC: H01L21/3205
Filed: 2002-01-28
Abstract: 하부 게이트에 기초한 소성 TFT 트랜지스터(8)를 사용하는 플렉시블의 AM-LCD에서, 데이터 라인(6) 또는 선택 라인(5)상의 신호 일그러짐이 낮은 저항의 션트(shunt)를 제공하기 위해 상기 데이터 라인(수직의 연결선(16))에 부착된 픽셀당 금속 스트립(15, 25)을 부가함으로써 감소된다.
Patent KR-20030007661-A (KR)
IPC: H05B41/282
Filed: 2002-03-11
Abstract: 용량성 결합된 형광 램프; 램프를 구동하기 위한 인버터 회로; 및 공급 전압을 수신하기 위한 공급 노드를 구비하는 용량성 결합된 형광 램프 패키지가 개시되어 있다. 용량성 결합된 형광 램프 패키지는 용량성 결합된 형광 램프를 구동하기 위한 공진 회로 램프 구동 기법을 포함한다. 본 구동 기법은 기생 캐패시턴스 누출 전류를 감소시키고; 전류원-타입으로 구동된 회로를 위한 인버터 회로 동작 주파수와 대략 같은 공진 주파수를 가지기 위해서 제 2 측 누출 인덕턴스를 사용하여 반응 전력을 보상하고; 전압원-타입으로 구동된 회로를 위하여 내장된 밸라스팅(ballasting) 캐패시터 및 제 2 측 누출 인덕턴스와 함께 직렬 공진 서브-회로를 형성해서 공진 주파수가 인버터 회로 동작 주파수보다 실질적으로 더 작고, 램프 전류가 전류 밸러스팅을 따라 적당하게 형성되게 한다.
Patent KR-20030007707-A (KR)
IPC: B29B17/00
Filed: 2002-03-27
Abstract: 본 발명은 사용이 끝난 수지의 재생 방법으로서, 사용이 끝난 수지의 재생 처리 시에 사용이 끝난 수지의 품질 저하한 특성 항목에 우수한 다른 수지를 첨가하여 수지를 재생함으로써, 사용이 끝난 수지의 재생 처리 시의 품질 저하를 방지한다.
Patent KR-20040063017-A (KR)
Inventor: SON SANG YONG
IPC: H01B3/12
Filed: 2003-01-04
Abstract: PURPOSE: Provided is a composition for an electric heater used for an electron gun, which is a cordierite-mullite complex excellent in properties and a heat impact resistance. A process for producing the composition is also provided. CONSTITUTION: The composition is produced by the process comprising the steps of: mixing 35-40wt% of talc, 20-25wt% of alumina, 30-35wt% of refined clay; passing the mixture through a standard sieve of 325mesh; mixing the resultant in a pot mill for 12 hours; dry-molding the mixed powder in a hydraulic press under a pressure of 0.1-0.5ton/cm¬2; calcining the resultant in an electric furnace at 1,100-1,450deg.C for 2 hours. The composition is the cordierite-mullite complex containing 10-50wt% of the cordierite.
Patent KR-20040042767-A (KR)
Inventor: KAWAMOTO TETSUAKI
IPC: A61G5/00
Filed: 2003-01-07
Abstract: PURPOSE: A sanitary chamber pot by automatic cleaning device to be installed on wheel chair is provided to allow the disabled who need a wheelchair or the person who can't walk to automatically or manually defecate, urinate or dry oneself, to save the fatigue and time of his/her protector or nurse, and to endow them with physical relief. CONSTITUTION: The sanitary chamber pot with an automatic cleaning device is installed on wheelchair, and includes: removable wearing panties(3), made out of water- proof vinyl or rubber; a detecting sensor(5), arranged on a lower pot(4); a warm-water cleaning injection nozzle(6), injecting the warm water to the anus(7) and urinary organ(8); a warm-wind drying nozzle(9) and a vent tube, drying the corresponding part after defecation or urination; and an automatic or manual selector switch button, for selecting the operation mode of defecation, urination, cleaning or drying, when a user defecates or urinates. A processing unit, under the lower pot(4), comprises a defecation bowl, a warm-water layer, a warm-wind blower, a sensor box and a vent tube.
Patent KR-20040063558-A (KR)
Inventor: PARK SEONG TAE
IPC: H04B1/40
Filed: 2003-01-08
Abstract: PURPOSE: A method for processing a multi-key of a mobile terminal is provided to simply process complicate key-input on a key pad by allocating plural keys to one function key. CONSTITUTION: When a user of a mobile terminal inputs a key(401), an MSM(Mobile Station Modem) recognizes and processes an interrupt operation(402). Every key of the mobile terminal is scanned to find a key combination according to key inputted content from a structure array(403). A key storage position stored in the structure array is scanned(404). The scanned key input combination content is shifted toward a UI(User Interface) TCB(Task Control Block) to perform a corresponding multi-key function(405). It is determined whether the key-input combination content is a function for editing a multi-key(406). If so, a function for editing the multi-key is performed(407), and then, the operation is terminated(411).
Patent KR-20040064039-A (KR)
Inventor: LEE SANG HUN
IPC: F16K15/00
Filed: 2003-01-09
Abstract: PURPOSE: A check valve installed in the middle of a fluid pipe for controlling both directions is provided to improve working efficiency and user's convenience. CONSTITUTION: A check valve assembly(30) is mounted with an out body(45,46) having connecting pipes. An inner body(49,50) is formed inside of the out body fixed by a bolt. A fixing hole(56) is formed in upper part of a valve to open/close by an operation bar(58). A seal(60) is inserted to the out body, the inner body, the valve, and the operation bar to prevent leakage. The valve body is fixed by a hinge in lower end and a clamp in upper end.
Patent KR-20040067261-A (KR)
Inventor: AHN JAE HUN
IPC: H02H7/18
Filed: 2003-01-22
Abstract: PURPOSE: A battery pack having a protection circuit for preventing a short circuit is provided to protect the battery pack from the short circuit due to an accidental cause by turning off a corresponding switch, automatically. CONSTITUTION: A battery pack having a protection circuit for preventing a short circuit includes a battery, a first and a second power terminal, a third and a fourth power terminal, and a protection circuit for preventing a short circuit. The protection circuit includes a first controller, a second controller, a first switching unit, and a second switching unit. The first controller is used for outputting a control signal according to a connecting state of a battery pack to a cellular phone. The second controller is used for outputting a control signal according to the connecting state of the battery pack to a charger. The first switching unit(50) is turned on or off in response to the control signal of the first controller. The second switching unit(52) is turned on or off in response to the control signal of the second controller.
Patent KR-20040069736-A (KR)
Inventor: DO GI JAE
IPC: G03G15/06
Filed: 2003-01-30
Abstract: PURPOSE: An apparatus and method for controlling a voltage of a non-contact developing device are provided to maintain charging efficiency and supply of a toner uniform until the toner is used up. CONSTITUTION: The total quantity of printing carried out by a non-contact developing device with respect to the total quantity of toner having one non-magnetic component, contained in a unit toner container, is measured(S2). The measured total quantity of printing is less than a reference printing quantity, a difference between a supply voltage provided to a supply roller and a developing voltage is maintained smaller than a standard voltage difference(S4). When the measured printing quantity reaches the reference printing quantity, the voltage difference is controlled to be larger than the standard voltage difference(S5).