baber/WOPTO huggingface dataset:
Patent KR-20010075262-A (KR)
IPC: H02M7/5387
Filed: 2000-07-21
Abstract: 전력공급장치는 DC 입력 소스(11)로부터 DC 입력 신호를 받아들이는 인버터를 포함한다.  인버터는 두 개의 하프 브리지(S1A, S2A 및 S1B, S2B)로 이루어진다.  각각의 인버터는 신호 소스(13A, 13B)에 의하여 구동되며, 상기 신호 소스는 AC 신호를 출력한다.  각각의 인버터로부터의 출력은 제 1스테이지 고조파 필터에 입력된다.  전력공급장치는 출력 회로를 포함하며, 상기 출력 회로는 소정 포인트에 대하여 배치된 제 1 및 제 2정류기(D1, D2)를 포함하여, 만약 인버터가 상기 포인트를 미리 설정한 제 1 및 제 2전압 이상으로 유도하려고 할 때 각각의 정류기는  적어도 하나의 전력 및 전류를 DC 입력 소스로 복귀시키도록 한다.  제 1고조파 필터(L1A, C1; L1B, C1)로부터 출력은 제 2고조파 필터(L2, C2)에 출력되며 전력공급장치로부터의 출력이다.
Patent KR-20010080494-A (KR)
IPC: D21H27/40
Filed: 1999-07-23
Abstract: 본 발명은 의복형 누비 외형을 제공하는 포개진 격자세공 엠보싱 패턴을 구비하는 엠보싱 다중 플라이 종이 제품과, 이러한 다중 플라이 종이 제품을 엠보싱 및 접착하는 방법을 제공한다.  다중 플라이 종이 제품은 엠보싱 요소의 ｎ + 1 열로 구성되는 계면 격자세공내에 포개진 엠보싱 요소의 ｎ 열로 구성되는 셀의 격자세공을 포함한다.
Patent KR-20010112227-A (KR)
IPC: G03F7/023
Filed: 2000-10-04
Abstract: 본 발명은 수지 조성물과 감광성 물질을 함유하는 포토레지스트로서 유용한 감광성 조성물에 있어서, 당해 수지 조성물로서, 굴절률 차가 0.03 이상인 2종 이상의 수지 혼합물을 사용하거나, 수지 조성물의 수지 성분으로서 알칼리 가용성 수지를 사용하고, 수지 첨가제로서, 아크릴계 중합체, 메타크릴계 중합체, 스티렌계 중합체 등, 감광성 조성물의 용해 억제제로서 기능하는 수지의 혼합물을 사용하는 감광성 조성물에 관한 것이다.  감광성 조성물의 테트라메틸암모늄 하이드록사이드 2.38중량%에 대한 용해 속도는 5000Å/분 이하인 것이 바람직하다. 이들의 수지 조성물을 사용함으로써, 퀴논디아지드 감광제의 사용량을 감소시킬 수 있고, 또한 고감도, 고잔막성의 양 특성을 동시에 만족하는 감광성 조성물이 수득된다.
Patent KR-20010108051-A (KR)
IPC: H04H20/00
Filed: 1998-12-28
Abstract: 코드화된 비트 스트림을 얻기 위한 오디오 신호 코딩 방법에 있어서, 오디오 신호의 이산-시간 샘플이주파수 영역으로 변환되어 스펙트럼 값을 얻는다. 스펙트럼 값은 길이가 다른 한정된 수의 코드 워드를 갖는 코드 테이블로 코드화되어 코드 워드에 의해 코드화된 스펙트럼 값을 얻는데, 스펙트럼 값에 지정된 코드 워드의 길이는 스펙트럼 값이 발생할 가능성이 높을수록 훨씬 더 짧아진다. 그 다음 코드화된 비트 스트림에 대해 래스터가 정해지는데, 이 래스터는 등거리의 래스터 포인트를 가지며 래스터 포인트 사이의 거리는 사용된 코드 테이블에 의존한다. 에러에 내성이 있는 허프만 코딩을 얻기 위하여, 우선순위의 코드 워드가 래스터에 배열되어 각 우선순위의 코드 워드의 시작이 래스터 포인트와 일치하게 되는데, 우선순위의 코드 워드란 다른 스펙트럼 값보다 정신음향학적으로 더 중요한 특정 스펙트럼 값을 나타내는 것이다.
Patent KR-20020033597-A (KR)
Title: Belt massage method and device for seat
Inventor: YANG MOON CHIL
IPC: A61H23/02
Filed: 2000-10-19
Abstract: PURPOSE: A belt massage method and a device for a seat are provided to allow a user to massage body portions with sitting down on a seat. CONSTITUTION: The belt massage device comprises a motor(25) installed on the back of the seat, a belt(28) extended from a rotating portion(27) which is eccentrically attached on a rotating shaft(26) of the motor, and an armrest(23) installed on the seat in which a belt guiding groove capable of guiding the belt is installed on a vertical extended portion of the armrest. The belt massage device enables the user to be massaged with sitting down on a seat. Therefore, spinal handicapped persons can easily use the belt massage device, and normal persons can simultaneously do other works such as desk work, reading, computer work, etc, with massaging their body portions. It can be useful in the circulation of the blood and the fatigue recovery. When the belt massage device is applied to the seat of cars or airplanes, it can play a role of a safety belt and can get rid of fatigues during driving or traveling.
Patent KR-20010104702-A (KR)
IPC: H02J3/32
Filed: 2000-01-26
Abstract: 전압 회복 장치(30)는 설비 전력망에 대해 검출된 결함 조건에 이어 소정 수준에서 설비 전력망에 실제 및 리액턴스 전력을 공급하고 명목상 전압의 소정 비율내에 설비 전력망에 대해 소정 기간동안 전압을 회복하도록 구성된다.
Patent KR-20020019429-A (KR)
IPC: G06F3/048
Filed: 1999-07-22
Abstract: 장치, 프로그램 제품, 유저 인터페이스 제어부, 방법은 데이터 세트 유저 인터페이스 제어부(44)에서 데이터 세트 유저 인터페이스 제어부에 의해서 엑세스 가능한 전체 데이터 세트에 대한 데이터의 서브세트의 크기를 나타낸다. 데이터 세트 유저 인터페이스 제어부(44)는 윈도우를 통해 엑세스 가능한 데이터(124)의 서브세트의 파라미터를 조정하도록 스크롤바(130)의 스크롤 영역(134)을 따라 조종될 수 있는 슬라이더 제어부(132)를 포함하여 스크롤바와 동일 방식으로 조정 가능하다. 더욱이, 슬라이더(124)의 길이는 전체 데이터 세트에 대한 현재의 서브세트의 크기를 나타내도록 스크롤 영역(134)의 길이에 비례하여 설정될 수 있다. 슬라이더(132)의 길이는 또한 현재의 서브세트의 길이를 조정하도록 유저에 의해서 조정 가능하다. 데이터 세트 유저 인터페이스 제어부(44)가 광범위한 각종 부가 환경에서 구현될 수 있으며, 하나의 특히 적합 사용 용도는 데이터 세트가 서버 컴퓨터를 통해 엑세스 가능한 외부 정보원으로부터의 서브세트의 형태로 수신되는 클라이언트-서버 환경에서의 사용이다.
Patent KR-20010111294-A (KR)
Title: 엔진에 분사되는 연료량을 제어하기 위한 전자식 분사 밸브
IPC: F02M51/00
Filed: 2001-01-05
Abstract: 본 발명은 전자 코일 시스템을 통해 이동할 수 있는 밸브 몸체를 구비한 엔진 내로 분사되는 연료량을 제어하기 위해, 상기 밸브 몸체가 전자 코일 시스템의 접극자와 연동하는 전자식 분사 밸브에 관한 것이다. 
     상기 전자 코일 시스템은 동심 배열된 적어도 2개 이상의 코일(32_1, 32_2)을 포함하며, 인접한 2개의 코일(32_1, 32_2) 사이에 각각 제1 자극 몸체(42_2)가 배열되고, 내부 및 외부 코일(32_1, 32_2)은 제2 자극 몸체(42_1, 42_3)에 인접하며, 상기 제1 및 제2 자극 몸체(42_1, 42_2, 42_3)는 전자 코일 시스템의 자기 회로의 구성 요소이며, 각각 인접한 코일(32_1, 32_2)이 상반된 방향으로 공동의 여자 전류(40)를 통해 전류를 공급받을 수 있도록, 상기 코일(32_1, 32_2)이 자기 회로에 설치되는 것을 특징으로 한다.
Patent KR-20020027376-A (KR)
IPC: H01L21/265
Filed: 2000-05-31
Abstract: 기판 상에의 회로의 제조 방법이 제공된다.  게이트 전극의 형성 이후, 측벽 스페이서는 게이트 전극의 측면 상에 형성된다.  p-형 소자의 소스/드레인 확장부와 소스/드레인 영역이 제1 마스크 내의 개구를 통하여 주입된다.  n-형 소자의 소스/드레인 확장부와 소스/드레인 영역은 제2 마스크 내의 개구를 통하여 주입된다.  소스/드레인 확장부는 저에너지로 및 기판 표면의 법선방향에 대하여 높은 경사각에서 주입되어, 소스/드레인 확장부가 측벽 스페이서의 아래에서 측방으로 형성된다.  소스/드레인 영역은 낮은 또는 0인 경사각에서, 및 소스/드레인 확장부를 주입하는 단계와 동일한 또는 그보다 더 높은 에너지에서 그리고 그보다 더 높은 도즈량으로 주입된다.  하나의 선택사항으로서의 발명의 양상에 있어서는, p-형 소자와 n-형 소자에 대해, 제1 및 제2 마스크는 웰, 채널 스톱부, 쓰레쉬홀드 조절부를 주입하기 위해 이용된다.  또 다른 임의 선택 기구에, 제3 마스크는 측방 분리를 위한 매립 주입 층(BILLI)공정을 형성하기 위해 이용된다.
Patent KR-20030061046-A (KR)
Inventor: YUN AN SO
IPC: B60R13/10
Filed: 2002-01-07
Abstract: PURPOSE: A number plate for a vehicle is provided to reduce materials and the cost and simplify the structure and to easily inform other drivers of the number of the number plate from a distance. CONSTITUTION: A number plate for a vehicle is composed of a number plate body part(10) attached on the vehicle, a base plate(20) for displaying a vehicle number fixed to the body part, a sign member(30) for displaying the number, and a rim(11) of the number plate settled to the base plate. The number plate of the vehicle is attached to the vehicle by a through-hole for settling the front of the vehicle and is supplied with power to light a diode(31) embedded in the sign member for displaying the number.
Patent KR-20030063757-A (KR)
Title: System and method for recording additional data relevant to image
Inventor: LEE HONG KYU
IPC: G03B17/24
Filed: 2002-01-24
Abstract: PURPOSE: An apparatus and a method for displaying additional information are provided to automatically display additional information, such as photographing time, date and place, in a photo. CONSTITUTION: An additional information displaying apparatus(100) includes a camera section(110), a display control section(112), a transmitting/receiving section(114), a display section(116), a GPS receiving section(118), a character input section(120) and a storing section(122). The camera section(110) is provided to take an image from an object. The display control section display position information based on geographic information transmitted from the transmitting/receiving section(114) and position data of the additional information displaying apparatus(100). The transmitting/receiving section(114) receives geographic information data from a personal computer(150) or a geographic information server(160). The GPS receiving section(118) receives signals from a GPS satellite(170).
Patent KR-20030066235-A (KR)
Title: Optical disc recorder
Inventor: LEE CHUNG U
IPC: G11B11/10
Filed: 2002-02-05
Abstract: PURPOSE: An apparatus for recording and playing an optical disk is provided to rise a slider at a certain height and strengthen a suspension controlling the slider by controlling a height of a gap according to strength of a magnetic power between the slider and the optical disk. CONSTITUTION: An optical disk(110) has a magnetic layer(113) formed on a substrate part(111) except a recording layer(112) to have a magnetic repulsive power with a magnetic layer of a slider. The slider is installed at the end of a swing arm to scan tracks of the optical disk, having the magnetic layer to rise at a minute gap by the magnetic repulsive power.
Patent KR-20030068235-A (KR)
Title: Rotary tube fitting
Inventor: KIM JONG TAE
IPC: F16L19/02
Filed: 2002-02-14
Abstract: PURPOSE: A rotary tube connector is provided to easily connect/separate a tube, and to improve work efficiency by simply exchanging an old connector. CONSTITUTION: A rotary sleeve(10) includes a sleeve head(11) having a plurality of slip preventing grooves(12). A tube is fit into elastic pieces(13) integrated with the rear of the sleeve head. A fixing protrusion(14) is formed at the end of the elastic pieces. A sleeve placed tube(20) is fit into a pipe(2), and narrows toward the end so that the rotary sleeve is placed. A spiral groove(21) is formed at the outer circumference of the sleeve place tube so that the fixing protrusion is slipped. A fitting groove(22) is formed at the end of the spiral groove, and fixes the fixing protrusion. A packing(30) is disposed in the pipe to be contacted with the end of the sleeve placed tube.
Patent KR-20030068848-A (KR)
Title: Method for repairing crevis on concrete structures
Inventor: KIM JIN U
IPC: E04G23/02
Filed: 2002-02-18
Abstract: PURPOSE: A method of reinforcing the corner at the inner floor of an underground valve room is provided to prevent water leakage and cracks at the corner of the underground valve room by reinforcements. CONSTITUTION: The process of reinforcing the corner at the inner floor of an underground valve room is composed of: cutting the lower corner of a concrete wall(6) into a triangle shape to form a filling groove(2); filling the cut space with quick-setting cement containing adhesives and hardening the mixture; drilling a hole(10) parallel to the previously cut section(7); putting a filling agent into the hole by a high-pressure spray; forming a synthetic coating layer from the surface of the wall concrete up to the surface of the floor for finishing. Consequently the reinforced structure prevents the concentrated stress adding to the corner.
Patent KR-20020068282-A (KR)
Inventor: LARRY ALAN WESTERMAN
IPC: G09G5/10
Filed: 2002-02-19
Abstract: PURPOSE: An efficient method for computing gamma correction tables is provided to calculate gamma correction tables accurately and reasonably by using the simple mathematical formula and coefficients. CONSTITUTION: An efficient method for computing gamma correction tables includes steps of determining a gamma correction equation between luminance values produced between two representations; determining at least one polynomial approximation having coefficient values to the gamma correction equation; grouping all of the coefficient values over a range of gamma to each coefficient value and then fitting a polynomial equation to each group to get a respective coefficient polynomial equation; computing coefficients for a given value of gamma using the coefficient polynomial equations; computing gamma conversion transformations using the computed coefficients and a simplified mathematical formula; and storing the computed gamma conversion transformations in a gamma correction table. The gamma table is calculated according to coefficients and formulas.
Patent KR-20030069627-A (KR)
Title: Method Of Fabricating Aluminum Case For Electrolytic Condenser And Apparatus Thereof
Inventor: KIM YEONG RAE
IPC: H01G2/10
Filed: 2002-02-22
Abstract: PURPOSE: A method and an apparatus are provided to achieve improved adhesive property, processing ability and heat resistance. CONSTITUTION: An apparatus comprises a blanking unit(32) for forming a coated aluminum plate into a cup shape; a deep drawing unit(34) and an ironing unit(36) for manufacturing the aluminum plate into a case; a washing unit(38) for washing the case by using ultrasonic waves; and a test unit(40) for testing the case. A method comprises a step of forming a case by baking an aluminum plate coated with a polyester resin; a step of washing the case by using ultrasonic waves; and a step of drying the case.
Patent KR-20030019060-A (KR)
Title: Use of bismuth subgallate in inhibition of production of nitric oxide synthase
Inventor: HSU CHENG SHENG
IPC: A61K33/24
Filed: 2002-02-28
Abstract: PURPOSE: Provided is a new use of bismuth subgallate in the inhibition of the production of nitric acid synthase to provide a method of and a pharmaceutical composition for inhibiting the production of nitric oxide synthases (NOS) in a subject. CONSTITUTION: A method of inhibiting the production of nitric oxide synthases (NOS) in a subject, is characterized by comprising administering to the subject in need thereof an effective amount of bismuth subgallate, wherein the bismuth subgallate is administered in an amount effective to inhibit the production of NOS.
Patent KR-20030072046-A (KR)
Title: Device for taping a condenser
Inventor: JUN JONG HUI
IPC: H01G13/00
Filed: 2002-03-05
Abstract: PURPOSE: A condenser taping apparatus is provided to enable a product to put on a carrier tape exactly when taping a condenser product at the tape carrier. CONSTITUTION: A rotation wheel(54) rotates a carrier tape(60). A supply chuck(70) is installed adjacent to the carrier tape to supply a condenser to the carrier tape. A vacuum absorption part(56) absorbs an air via an absorption hole(64) formed at a groove(62) of the carrier tape. An extraction part extracts a condenser when a condenser is abnormally inserted in the groove of the carrier tape. A guide stick(74) senses whether the condenser inserted in the groove of the carrier tape is out and operates an adjacent sensor so that a taping apparatus(50) stops.
Patent KR-20030076820-A (KR)
Title: a dust
Inventor: KIM CHUNG HWAN
IPC: B08B15/00
Filed: 2002-03-22
Abstract: PURPOSE: A method of removing scattering dust is provided to effectively remove dust by jetting the mixture of water and an adhesive material in the air of an area where scattering dust occurs and by solidifying dust. CONSTITUTION: Water and an adhesive material is inserted and mixed in a storage tank. The mixture ratio of the water and adhesive material is 9 to 1¯7 to 3. An air compressor and the storage are connected and then the mixture is jetted in the air. Scattering dust in the air and the mixture are mixed, and the dust sticks to the mixture. The dust settles on the ground by the increased specific gravity. The settled dust is removed. The mixture comprises water and cement powder. The mixture comprises water and a vegetable adhesive agent.
Patent KR-20030081732-A (KR)
Title: Method and Device for Creating Paduk Record of Go
Inventor: KIM HOE YUL
IPC: A63F3/00
Filed: 2002-04-12
Abstract: PURPOSE: A Go game record generation method and system is provided to capture images of a Go game match, and to automatically generate the record of the GO game by using the captured images. CONSTITUTION: The method comprises several steps. Image signals are received from a camera(S500). The received image signals are smoothed(S502). A game board is recognized among the received image signals(S504). The cross points formed on the game board are recognized(S506). A movement over the game board is detected(S508). It is checked whether a hand of a game player is moved or a new stone is positioned on a cross point(S510). The movement detection step is repeated until the game match is stopped, and the record of the Go game is generated if the game match is stopped(S512). The generated record is transmitted to a server over a wired or wireless network(S514).
Patent KR-20030081835-A (KR)
Title: Packet data service method in wireless telecommunication system
Inventor: BAE BEOM SIK
IPC: H04W4/16
Filed: 2002-04-13
Abstract: PURPOSE: A method for servicing packet data of a wireless communication system is provided to enable a base station to quickly terminate a service instance when a terminal decides that re-connection of a service indicated by a service reference identifier is unable, thereby reducing wireless resource consumption without influencing on the system. CONSTITUTION: When a packet is to be transmitted to a terminal in a dormant state, a base station transmits a page message to the terminal(401). The page message includes an SR_ID(Service Reference Identifier) of a service to be re-connected in the dormant state. The terminal checks whether a service instance is capable of being connected in reference to the SR_ID. If not, the terminal includes a service option value indicating a service connection rejection in a page response message, and transmits the page response message(402). The base station transmits a release order to the terminal(403). The terminal responds to the release order, and terminates a service(404).
Patent KR-20030088930-A (KR)
Title: Apparatus for inputting document using a digital camera
Inventor: KWON HYOK SANG
IPC: G06K9/20
Filed: 2002-05-15
Abstract: PURPOSE: A device for inputting a document using a digital camera is provided to input the document or a drawing conveniently by picturing the document or the drawing according to the picturing setting information of the digital camera and transmitting the pictured information to a computer without operating the digital camera directly. CONSTITUTION: The digital camera(10) transmits the picturing information by picturing the document or the drawing according to the picturing setting information received from the outside after picturing and transmitting the document or the drawing. An interface(20) makes the information pictured through the digital camera transmit to the outside and makes the picturing information transmitted from the outside transmit to the digital camera. After receiving the picturing setting information set by a user and transmitting it to the digital camera, the computer(30) receives and stores the picturing information pictured by the picturing setting information in a memory.
Patent KR-20020092793-A (KR)
Inventor: KOZASA NAOTO
IPC: H05B33/10
Filed: 2002-05-20
Abstract: PURPOSE: To provide a full-color organic EL display unit with which localized defective resistance and disconnection of a second electrode formed on an organic layer are eliminated. CONSTITUTION: A hole injection layer 40 and a hole transport layer 41 are formed on the surface of the first electrodes 2 and insulation layers 3 covering across a plurality of first electrodes 2. Fields for each color 60a, 60b, 60c are selected and luminous layers 42a, 42b, 42c, electron transport layers 43a, 43b, 43c, electron injection layers 44a, 44b, 44c are formed in each field. An organic layer composed of the hole injection layer, the hole transport layer, the luminous layer, the electron transport layer and of the electron injection layer forms a continuous layer connecting the fields 60a, 60b, 60c selected for each color. The thickness of the organic layer for each color is made different for the purpose of adjusting luminous efficiency, which forms unevenness on the surface of the organic layer. The layer thickness of a second electrode, however, is configured to be bigger than the maximum value of the addition of the thickness of the luminous layer and that of the electron transport layer.
Patent KR-20030090268-A (KR)
Inventor: HAN YONG SU
IPC: B23G1/16
Filed: 2002-05-22
Abstract: PURPOSE: A tapping machine is provided to improve productivity by quickly and precisely tapping a workpiece. CONSTITUTION: A tapping machine is composed of a worktable(10), a support member(20) formed upward at the worktable, a guide unit(30) installed at the support member, an operating unit(40) coupled with the guide unit, a tapping unit(50) installed at the end of the operating unit and tapping workpieces(1), and a weight control unit(60). The weight control unit is located at one side of the support member.
Patent KR-20030090358-A (KR)
Title: Method, Device and System for providing calorie consumption quantity
Inventor: CHOI JEONG DO
IPC: H04W8/18
Filed: 2002-05-23
Abstract: PURPOSE: A method, an apparatus and a system for providing the quantity of consumed calories are provided to realize an additional service including the quantity of motion corresponding to quantity of consumed calories, an alarm message, and a schedule function. CONSTITUTION: A vibration sensor(105) senses a vibration signal for outputting the same to a control unit(100). The control unit(100) senses whether the vibration is vibration according to movement of a subscriber. A counter counts the number of steps, corresponding to a counting signal received from the control unit(100). The control unit(100) measures the time until the next vibration sensing signal is received, by using a timer(113). The control unit(100) transmits the counted value to a calorie consumption quantity managing server. A mobile communication terminal receives calorie consumption quantity amount from the calorie consumption quantity managing server, and outputs the received information through an output device.
Patent KR-20030092555-A (KR)
Title: Bicycle transmission
Inventor: KIM JUN SEOK
IPC: B62M3/02
Filed: 2002-05-30
Abstract: PURPOSE: A transmission for a bicycle is provided to simply change the speed of the bicycle by varying the height of a pedal in a crank. CONSTITUTION: A crank(20) includes a long guide hole(22) having a shaft hole. A stopper is formed at the lower part of the guide hole. A pedal(31) is installed at one side of a pedal assembly(30) having a through hole(33). An insertion hole(32) is formed at the center of the pedal assembly so that the pedal assembly moves up/down along the guide hole. A position control member(50) couples the crank to the pedal assembly, and controls the position of the pedal assembly when the height of the pedal assembly is varied in the guide hole. A moving member(60) is fixed to one side of the position control member, and moves the position control member. A spring(61) is interposed between the moving member and one side of the pedal assembly, and supports the moving member elastically.
Patent KR-20030092691-A (KR)
Title: assister of umbrella
Inventor: CHUNG GI SANG
IPC: A45B25/00
Filed: 2002-05-30
Abstract: PURPOSE: Umbrella aids are provided to give durability to the umbrellas when wind blows hard by having three fishing lines connected from the center to the end of the umbrella using snap fasteners. CONSTITUTION: The umbrella aids include three fishing lines which connect the center of the umbrella to three ends of the umbrella so as to increase the durability of the umbrella by making a three-angled frame; snap fasteners which connect the fishing lines to the umbrella ribs so that the umbrella is not inside out.
Patent KR-20030093872-A (KR)
Inventor: CHI JAE HOWAN
IPC: F24C15/02
Filed: 2002-06-05
Abstract: PURPOSE: A safety oven door is provided to prevent burn accident by removing dangerous factors with inexpensive cost and simple change of structure. CONSTITUTION: An oven door is folded in horizontal direction to be opened, and has double locking units(N1,N2) so as to be opened only with both hands. The oven door is moved in the direction of arrows by hinges(K1,K2). A child is not allowed to easily open the oven door thereby. The oven door has an upper end with smaller area, and is put to one side to prevent accident in which an oven falls down to front side. Sides of the oven door heated by the oven face each other and overlapped when the oven door is opened so as to prevent the heated sides of the oven door to be exposed to the outside if outer circumferences of the heated sides of the oven door are processed for heat insulation to prevent burn.