baber/WOPTO huggingface dataset:
Patent KR-20040043496-A (KR)
Title: telephone system having a voice telephone number registation function and controlling method therefore
Inventor: SHIN GYE IN
IPC: H04W88/04
Filed: 2002-11-18
Abstract: PURPOSE: A telephone system comprising function of registering a telephone number by voice and its control method are provided to reduce unnecessary operation error by performing telephone number registration accurately. CONSTITUTION: A CPU(6) includes functions of a wire/wireless telephone system and controls a function of registering a telephone number by voice. A flash memory(7) outputs a signal corresponding to key input among embedded telephone number assembly data according to a function control signal of the CPU and stores telephone number registration information. A DSP part(8) transmits a Hangul assembly data and a number signal provided from the CPU according to the function control signal of the CPU as a voice signal and processes a voice traffic signal. And a LCD panel(9) outputs a telephone number registration signal according to the key input according to a display control signal of the CPU.
Patent KR-20040046472-A (KR)
Title: Piezoelectric ceramic composite for application to multilayer actuator and manufacturing method thereof
Inventor: AHN CHEOL U
IPC: C04B35/491
Filed: 2002-11-27
Abstract: PURPOSE: A composition for multilayer piezoelectric actuators having high piezoelectric constant and low temperature sintering by adding ZnO and CuO instead of CdO to Pb£(Ni1/3Nb2/3)0.41Ti0.36Zr0.23|O3 piezoelectrics. CONSTITUTION: The composition for multilayer piezoelectric actuators, expressed by the formula of Pb£(Ni1/3Nb2/3)0.41Ti0.36Zr0.23|O3 + xmol% ZnO + ymol% CuO (1.0<=x<=9.0, 0.5<=y<=3.0), is obtained by the following steps of: mixing NiO and Nb2O5 in a ratio of 1:1 and calcining a mixture at 1000deg.C for 5hrs to get NiNb2O6; weighing raw materials such as PbO, TiO2, ZrO2 and NiNb2O6 according to the mole fraction for the formula of 0.41Pb(Ni1/3Nb2/3)O3-0.36PbTiO3-0.23PbZrO3, and wet ball-milling for 24hrs; drying milled powder and calcining at 850deg.C for 3hrs; adding calcined 1-9mol% of ZnO and 0.5-3mol% of CuO to the calcined powder, mixing, forming to a disk shape, and sintering at 850-100deg.C; polishing sintered bodies, forming electrode, and polling the ceramics at DC 3.5kV/mm for 30min in a silicon oil bath(120deg.C).
Patent KR-20040049702-A (KR)
Inventor: LEE JOONG HO
IPC: C02F1/461
Filed: 2002-12-06
Abstract: PURPOSE: Provided is an electrolyzing machine for preparing ionic water which electrolyzes tap water into acidic water and alkaline water and is able to remove calcium carbonate from an electrolytic plate. CONSTITUTION: The machine comprises a front side plate(10) having a tap water inlet(11) on one side, an acidic and an alkaline water outlet(12a,12b) on the other side in a row and a packing insertion groove(13) on one side, a plurality of partitioning plates(16) having a connecting hole(17) therein, a discharge hole(18a) on one side corresponding to an outlet, a discharge hole(18b) on the other side connecting to the connecting hole, and a packing insertion groove(13) and an ion exchange plate on both sides, an electrolyzing plate(22) inserted on the inner part of each partitioning plate and having a terminal exposed on the outer part of the partitioning plate, the ion exchange plate installed on the inside of the ion exchange plate insertion groove to pass only ion, a packing inserted on each packing insertion groove to keep closed tightly, a rear side plate(24) assembled to the final partitioning plate and having a packing insertion groove(13) formed on the connecting side with the partitioning plate and an engaging means unifying the front side plate, the rear side plate and the partitioning plate.
Patent KR-20040050111-A (KR)
Title: Ionization system of ion implantation
Inventor: PARK SANG GUK
IPC: H01L21/265
Filed: 2002-12-09
Abstract: PURPOSE: An ionization system of ion implantation equipment is provided to increase the discharging amount of ions by using a rotation unit for rotating an electromagnet to increase the collision possibility between thermoelectrons and source gas. CONSTITUTION: An ionization system of ion implantation equipment includes an arc chamber, a filament, a plurality of electromagnets, and a rotation unit. The arc chamber(100) includes an inflow hole from receiving a source gas and an outlet hole for discharging ions. The filament(120) is installed at one side of the arc chamber in order to radiate thermoelectrons. The electromagnets(200) are installed at both sides of the arc chamber in order to form the magnetic field. The rotation unit rotates the electromagnets around a rotary shaft of the arc chamber.
Patent KR-20030051320-A (KR)
Inventor: OKUNOKI YUTAKA
IPC: A63F13/58
Filed: 2002-12-14
Abstract: PURPOSE: To provide a voice control method in which the voice quality of a character can be variously set in a computer game in which the character outputs voices. CONSTITUTION: A voice inputted from the outside or a voice prepared in advance is converted on the basis of the attribute information on the character, and the voice of the converted voice quality is outputted as a voice of the character. Thus, the voice of the character to appear in the computer game can be set to the voice quality corresponding to the characteristics of this character, and various voice qualities can be prepared for each character set by each of players.
Patent KR-20030057339-A (KR)
IPC: C09D11/30
Filed: 2002-12-24
Abstract: 문자,부호, 도형 또는 이들의 조합 등으로 이루어지는 각종 마크에 대해서, 도막전사기술을 이용한 마크전사기술을 제공한다. 
     마크전사테이프(T)는 기재테이프(15)의 표면에, 다수의 감압점착성을 갖는 전사마크(M)가 소정간격을 두고 박리가능하게 점착유지되어 이루어지며, 이 전사마크(M)는 피전사부 상에 점착되는 이면측 감압점착제층(19)의 점착력이 기재테이프(15)에 대한 점착유지력보다 크게 설정되어 이루어지는 점착시일의 형태로 되어 있다. 피전사부 상에 전사된 전사마크(M)는 점착시일과 같이 일단 박리해서 다시 붙이거나, 불필요하게 되면 박리제거하는 것도 가능하다.
Patent KR-20040056732-A (KR)
Inventor: CHOI BONG JUN
IPC: F25D17/06
Filed: 2002-12-24
Abstract: PURPOSE: A refrigerator is provided to reduce power consumption by cooling a freezer compartment and a refrigerating compartment respectively, to increase cooling speed by forcibly blowing cold air to the refrigerating compartment with a sirocco fan, and to extend the defrost period by restricting contact of cold air from the freezer compartment and cool air from the refrigerating compartment. CONSTITUTION: A refrigerator comprises a freezer compartment(1); a refrigerating compartment(2) installed near the freezer compartment; a barrier(3) separating the freezer compartment from the refrigerating compartment; an evaporator(4) installed in the barrier to form the refrigerating cycle; a partition plate(9) dividing the heat exchange area of the evaporator into two parts; a freezer compartment cool air passage formed in the barrier to supply cool air heat-exchanged by the evaporator in one divided part to the freezer compartment; a refrigerating compartment cool air passage formed in the barrier to supply cool air heat-exchanged by the evaporator in the other divided part of the evaporator to the refrigerating compartment; and blower fans(105,205) installed in the freezer compartment and refrigerating compartment cool air passages to forcibly blow cool air to the compartments. The freezer compartment cool air passage is connected to the refrigerating compartment cool air passage, and a damper is mounted in the connection path.
Patent KR-20040056860-A (KR)
Title: Air inflow protection system for discharging process in a reheatinh furnace
Inventor: JUNG HONG GYU
IPC: F27B9/30
Filed: 2002-12-24
Abstract: PURPOSE: An apparatus for preventing external air from flowing into reheating furnace during extraction of work is provided to prevent temperature drop in the furnace and variation of oxygen concentration by blocking inflow of an external cold air into the furnace when opening or closing output side door of walking beam type reheating furnace. CONSTITUTION: The apparatus comprises an external air blocking force generating means for generating combustion gas having upward momentum larger than momentum possessed by the external air from the rear of work extracting passageways(52) inside the output side door to cut off air flown in from the outside when opening the output side door; and an electrical controller(14) for finely lifting or lowering pressure in the furnace by adjusting a furnace pressure controlling damper as controlling operation of the external air blocking force generating means by door opening signal and door closing signal generated from furnace combustion control system(20) during extraction of the work, wherein the external air blocking force generating means comprises burners(8,9) respectively equipped with fuel supplying nozzles(6,7) and combustion air injection ports(4,5) opened and closed by the electrical controller and installed at a lower part of left and right sides in rear of the work extracting passageways inside the output side door to discharge combustion gas toward the center of the reheating furnace; and radiant tubes(10,11) installed in rear of the work extracting passageways, formed in a certain capacity to contain the combustion gas by collecting combustion gas of the respective burners and arranged from the tip of an ignition part of the burners to central part of the reheating furnace.
Patent KR-20040057113-A (KR)
Title: Operation information management method and apparatus in switching system
Inventor: PARK CHANG U
IPC: H04M3/22
Filed: 2002-12-24
Abstract: PURPOSE: A method and an apparatus for managing operation information in a switching system is provided to allow all subscribers as well as system managers to access various system operation information or subscriber information so that they can add, modify, delete or confirm various system operation information or subscriber information within a preset system management range or a subscriber-side system management range. CONSTITUTION: In case that an access request is generated for various system operation information or subscriber information stored in a database, a switching system judges whether the subject of the access request is a system manager or a subscriber(S30,S31). Within a preset system management range or a subscriber-side system management range according to the judged subject, the switching system enables the system access subject to input or output various system operation information and subscriber information stored in the database.
Patent KR-20040058499-A (KR)
Title: acrylic denatured alkyd resin composition including epoxy-ester and method of preparing the same
Inventor: JUNG TAE SEOP
IPC: C09D163/00
Filed: 2002-12-27
Abstract: PURPOSE: Provided is an acryl modified-alkyd resin which has improved solvent and chemical resistance, and is quickly air-dried at room temperature, thereby being suitably applied for repainting. The resin effectively prevents the paint from being smeared as well as the existing paint from being melted. CONSTITUTION: The acryl modified-alkyd resin composition comprises: 100pts.wt of an alkyd resin, of which oil length is 35-55%, the hydroxyl group content is 3-5%, and the acid value is 15 or less; 10-40pts.wt of an epoxy ester resin, of which oil length is 20-25%, and the acid value is 5 or less, wherein the epoxy ester resin is obtained from an epoxy resin having 300-1200 equivalent amount of epoxy and 50% or less of a solid content, and fatty acid; 80-180pts.wt of a monomer mixture of a vinyl monomer, an acrylic monomer and an organic acid monomer; and an initiator. A method for preparing the composition comprises: preparing an alkyd resin by mixing and reacting fatty acid, saturated basic acid, unsaturated dibasic acid and polyhydric alcohol; mixing 100pts.wt of the resulted alkyd resin and 10-40pts.wt of an epoxy ester resin; to the resulted mixture, adding 80-180pts.wt of a monomer mixture comprising a vinyl monomer, an acrylic monomer and an organic acid monomer, and an initiator at a constant speed to give an acryl modified-alkyd resin composition.
Patent KR-20030057449-A (KR)
IPC: C01G23/00
Filed: 2002-12-27
Abstract: 본 발명은 미립이고 결정성이 우수한 고품질의 티탄산 바륨 등의 복합 산화물을 저렴하게 제조할 수 있는 복합 산화물 분말의 제조 방법 및 복합 산화물 분말을 제공하는 것을 목적으로 한다. 
     본 발명에 따르면, Ba(OH) 2 ·8H 2 O를 가열하여 Ba용해액을 생성하고, 250m 2 /g 이상의 비표면적을 갖는 TiO 2 분말과 상기 Ba용해액을 반응시켜서 결정성이 우수한 입방정(立方晶) BaTiO 3 를 제조하고, 이러한 입방정 BaTiO 3 를 하소하여 미립이고 결정성이 우수한 정방정(正方晶) BaTiO 3 를 제조한다.
Patent KR-20040061449-A (KR)
Title: Gamma reference voltage genereration circuit of Liquid Crystal Display Device
Inventor: HAN GIL JUN
IPC: G09G3/36
Filed: 2002-12-31
Abstract: PURPOSE: A gamma reference voltage circuit of an LCD is provided to reduce the manufacturing cost and the current consumption by removing a gamma buffer from the gamma reference voltage circuit. CONSTITUTION: A gamma reference voltage circuit of an LCD includes a gamma register and a regulator. The gamma register(302) includes a plurality of resistors connected between a supply voltage terminal and a ground terminal. The supply voltage is divided into plural gamma reference voltages by the resistors. The gamma register is used for outputting the gamma reference voltages to a data driver. The regulator(303) is used for supplying a constant voltage between the resisters of the gamma register. An output voltage of the regulator is less than the divided voltage of the resistor connected to the regulator.
Patent KR-20020026538-A (KR)
IPC: B22D29/04
Filed: 2000-07-14
Abstract: 본 발명은 용탕이 주입된 생사 주형으로부터 주물소재를 손상시키지 않고 꺼내는 방법과 장치를 제공한다.  본 발명의 방법은, 주탕이 완료된 주형으로부터 주물소재를 분리하는 방법으로서, 주물소재 주조라인에서 내부에 주탕이 완료된 상하 생사주형을 상기 주조라인으로부터 소정의 위치까지 반송하는 단계와, 상기 소정의 위치에 놓인 상하 생사주형중 적어도 한 쪽과 그 한 쪽 주형내부의 주물소재를 챔버 내부에 기밀상태로 포위하는 단계와, 상기 챔버를 감압하여 상기 적어도 한 쪽 생사주형의 수분 응축층중에 있는 물의 비점을 낮추어 상기 수분 응축층중에 있는 물을 비등시키고, 이로써 상기 적어도 한 쪽의 생사주형을 붕괴시켜 상기 주물소재로부터 분리시키는 단계를 포함하여 이루어진다.
Patent KR-20020010941-A (KR)
IPC: C11D1/90
Filed: 2000-07-27
Abstract: 비이온성 및 양쪽성 계면활성제로부터 선택된 적어도 하나의 주 계면활성제, 적어도 하나의 글리콜, 타르산, 탈이온수 및 오르토인산, 포스폰산, 글리콜산, 글루콘산, 글루코헵톤산 및 시트르산으로부터 선택된 하나 이상의 산으로 이루어진 금속 세정 조성물이 개시되었다. 상기 조성물은 작동하는 엔진의 공기 흡입부로 이 조성물을 분무해서 자동차 엔진을 세정하는데 사용된다.
Patent KR-20020059719-A (KR)
IPC: C08H1/00
Filed: 2000-11-10
Abstract: 본 발명은 재조합 젤라틴, 그를 포함하는 조성물, 및 이들의 제조 및 이용 방법에 관한 것이다.
Patent KR-20030019305-A (KR)
IPC: G02B5/20
Filed: 2000-07-24
Abstract: 개선된 레이저 열 이미징 방법 및 본 발명의 개선된 방법을 사용하여 얻은 이미징된 레이저러블 조립체를 기재한다.  이 개선된 방법은 고속에서 효과적으로 작동하고 또한 이 개선된 방법에 따라 열 이미징을 행했을 때 리시버 소자 상에 존재하는 이미지의 양호한 내구성 및 높은 이미지 밀도를 가능하게 한다.  개선된 방법의 한 가지 응용 방법으로서 칼라 필터 소자를 제공한다.
Patent KR-20030072204-A (KR)
Title: Method for increasing the gene expression of transfected genes
IPC: C12N15/09
Filed: 2001-02-09
Abstract: The present invention provides a method of increasing the gene expression of transfected genes which includes the administration of a carnitine.
Patent KR-20020077454-A (KR)
IPC: H04N5/073
Filed: 2001-12-06
Abstract: 텔레비젼/모니터 멀티 픽처인픽처(multi-picture in picture) 시스템 상에 하나 이상의 화상을 디스플레이하는 시스템은 알려져 있다. 본 발명은, 각각의 카메라가 데이지 체인으로 연결되어 전체 화상 중 해당 카메라가 담당하는 부분을 CVBS-라인 상에 추가하는, 멀티 픽처인픽처 시스템을 제안한다. 주요 차이점 중 하나는, 각각의 카메라가 하기 때문에, 이제 텔레비젼/모니터는 전체 화상을 준비할 필요가 없다. 또한 각각의 카메라가 해당 카메라가 또한 로킹(locking)되어 있는 "장소"에 해당 카메라가 담당한 화상을 추가하기 때문에, 로킹과 관련된 문제가 발생되지 않는다.
Patent KR-20030007452-A (KR)
Title: Blowing agent delivery system
IPC: B29C45/50
Filed: 2001-02-21
Abstract: The invention provides a blowing agent delivery system for introducing a blowing agent into a polymeric foam processing system. The delivery system is designed to discontinuously introduce blowing agent from a continuous source into polymeric material within an extruder. The system, thus, may improve control over blowing agent delivery in discontinuous polymer processing systems such as injection molding or blow molding. In some embodiments, the blowing agent delivery system selectively directs blowing agent flow from the source to the extruder barrel, or through a bypassing passageway. In this manner, blowing agent may be continuously supplied by the source but discontinuously injected into the extruder barrel. During use, the delivery system may cause blowing agent to flow through the bypassing passageway, for example, when the screw stops plasticating polymeric material.
Patent KR-20030043788-A (KR)
IPC: C23C14/02
Filed: 2001-04-24
Abstract: 본 발명은, 초임계 예비세척 단계, 초임계 탈착 단계 및 금속침착 단계를 포함하는, 기판상에 금속필름을 침착시키는 방법에 관한 것이다.  바람직하게는, 상기 예비세척 단계는 기판의 금속표면으로부터 산화물층을 제거하기 위해 초임계 이산화탄소 및 킬레이트제와 기판과의 접촉을 유지시키는 단계를 포함한다.  보다 바람직하게는, 상기 예비세척 단계는 초임계 이산화탄소, 킬레이트제 및 산과 상기 기판과의 접촉을 유지시키는 단계를 포함한다.  다르게는, 상기 예비세척 단계는 초임계 이산화탄소 및 아민과 상기 산화물층과의 접촉을 유지시키는 단계를 포함한다.  탈착 단계는 기판으로부터 흡착된 물질을 제거하기 위해 초임계 이산화탄소와 기판과의 접촉을 유지시키는 단계를 포함한다.  이어서, 금속침착 단계는, 금속필름을, 상기 예비세척된 기판의 금속표면을 산화시키는 산화 물질, 및 상기 기판에 흡착하는 비휘발성 흡착 물질에 대한 상기 기판의 노출 없이 기판상에 침착시킨다.  기판상에 금속필름을 침착시키기 위한 장치는 이동 모듈, 초임계 공정 모듈, 진공 모듈 및 금속침착 모듈을 포함한다.  작동 중, 금속필름을 침착시키는 장치는 초임계 예비세척 단계, 초임계 탈착 단계 및 금속침착 단계를 수행한다.
Patent KR-20030005317-A (KR)
IPC: C07C67/54
Filed: 2001-01-26
Abstract: 알킬아다만틸에스테르와 같이 그 제조공정에서 그 비등점보다도 낮은 온도에서 승화를 개시하는 승화성 물질을 불순물로서 포함하는 조유기 화합물을, 증류라는 간단한 방법에 의해 승화성 물질의 부착에 의한 악영향을 받는 일 없이 정제하여, 목적으로 하는 유기 화합물을 효율 좋게 얻는 방법을 제공한다. 
     목적으로 하는 유기 화합물의 비등점보다 낮은 비등점을 갖는 화합물, 예를 들어, 카보닐기 함유 화합물의 존재하에 증류를 행한다.  예를 들어, 아다만탄(승화 개시 온도 실온 이하) 등의 승화성 불순물을 포함하는 2-메틸-2-아다만틸메타크릴레이트(비등점 92℃/0.3mmHg)를 증류할 때에, 1,3-디메틸-2-이미다졸리디논(비등점 225℃)의 존재하에 증류를 행한다.
Patent KR-20030010668-A (KR)
Title: Vehicle interior panel and method of making
IPC: B60K37/00
Filed: 2001-06-05
Abstract: A vehicle interior panel is provided that comprises an inner wall and an outer wall connected by an integral side wall. A portion of the panel comprises an air bag deployment opening at least partially defined by a tear guide. A portion of the panel also comprises at least one chamber located between the inner wall and outer wall of the panel. In this manner, a vehicle interior panel is provided having both an air bag deployment opening and at least one chamber in a single panel.
Patent KR-20040072871-A (KR)
Inventor: JUNG GYEONG YEOL
IPC: C09K11/64
Filed: 2003-02-11
Abstract: PURPOSE: Provided is a process for producing a blue phosphor for a plasma display panel, which keeps a spherical shape and improves a thermal property, an optical property, and the brightness and lifetime of goods. CONSTITUTION: The process comprises the steps of: spraying a precursor solution containing an aluminum(Al) compound, a barium(Ba) compound, a magnesium(Mg) compound, and an europium(Eu) compound and drying and heat-decomposing at 200-1600deg.C to obtain phosphor particles, wherein the total concentration of the precursor solution is 0.02-3M; heat-treating the phosphor particles under a vacuum of 10¬-1 to 10¬-3mmHg at 200-1000deg.C; reduction heat-treating the heat-treated phosphor particles under an atmospheric pressure at 1300-1500deg.C by using a hydrogen/nitrogen mixture gas.
Patent KR-20040075587-A (KR)
Inventor: HAN JEONG GEUN
IPC: E06B5/11
Filed: 2003-02-21
Abstract: PURPOSE: A folding swing safety window for the emergency escape is provided to prevent housebreaking, to escape to the outside in an emergency such as a fire, and to control the opening space regardless of the size and space of a mosquito net freely. CONSTITUTION: The folding swing safety window for the emergency escape comprises: a movable window frame(A) which contains a central shaft frame unit(1) rotated possibly, a rotary frame unit(2) rotated together with an end ring by fitting to a rotary circular groove of the central shaft frame unit(1), a convex frame unit(3) fitted with a concave frame unit(4) on the opposite side of the rotary frame unit(2), upper and lower frame units(5,6) and a wheel attached to the upper and lower frame units(5,6); and a fixed window frame(B) which contains the concave frame unit(4) overlapped with the convex frame unit(3) and fixed to a U-shaped convex part of a fixed window frame and rail frame units(7,8) moving the wheel attached to the movable window frame(A).
Patent KR-20040078251-A (KR)
Inventor: LIM JONG WON
IPC: H04N5/445
Filed: 2003-03-03
Abstract: PURPOSE: A digital TV receiver is provided to rapidly shift channels and provide EPG(Electronic Program Guide) data for every channel. CONSTITUTION: A digital TV includes the first, second and third modules(100,110,120). The first module includes the first controller(101) having the first tuner for receiving an RF(Radio Frequency) signal and the first demodulator, and the first MPEG decoder(102) for decoding a signal output from the first controller. The second module includes the second controller(111) having the second tuner for receiving an RF signal and the second demodulator, and the second MPEG decoder(112) for decoding a signal output from the second controller. The third module includes the third controller(121) having the third tuner for receiving an RF signal and the third demodulator, and the third MPEG decoder(122) for decoding a signal output from the third controller. The signals output from the first, second and third modules are input to an audio/video selector(130) of the digital TV system.
Patent KR-20040056366-A (KR)
Inventor: KIM JONG GEUN
IPC: B65D43/08
Filed: 2003-03-03
Abstract: PURPOSE: A container is provided, in which a locking device for jointing a cover to a main body detachably is prepared to have many locking points, so that to vary a volume of a containing room is possible. CONSTITUTION: The locking device comprises: a jointing unit(50) prepared on the side of a cover(20): and a rotating unit(40) prepared on the side of a main body(10) to rotate and to have many inserting holes(45,46,47) into which the jointing unit(50) is inserted. Inserting holes(45,46,47) are arranged on the rotating unit(40) in up-down direction. When the jointing unit(50) is inserted into a bottom one of inserting holes(45,46,47), a volume is minimized. Meanwhile, when the jointing unit is inserted into a top one of inserting holes(45,46,47), a volume is maximized.
Patent KR-20040078724-A (KR)
Inventor: BAE GWANG HYEON
IPC: B03B5/04
Filed: 2003-03-04
Abstract: PURPOSE: A method for separating a harmful object from a junk gypsum is provided to effectively remove the harmful object contained in the junk gypsum, thereby recycling the junk gypsum and saving the resources. CONSTITUTION: The method for separating a harmful object from a junk gypsum comprises the steps of: scrubbing step by mixing a water and the junk gypsum and scrubbing it with a desired rotary water for a constant time; and wet density-separating by flowing down the scrubbed material together with a water along a determined inclined plane from the top, thereby separating a heavy mineral and a light mineral while flowing down.
Patent KR-20040080217-A (KR)
Inventor: JUNG SEOK YONG
IPC: F28D11/02
Filed: 2003-03-11
Abstract: PURPOSE: A rotary regenerative air preheater is provided to promote internal flow improvement of a fluid and heat transfer performance by changing the shape of a heating element in a rotor and to improve the preheating efficiency by preventing by-products from being attached to the surface of the heating element. CONSTITUTION: A rotary regenerative air preheater comprises a housing(2) and a rotor(3) rotating around a driving shaft(1) in the housing. Exhaust gas inlet and outlet ducts(6,7) and air inlet and outlet ducts(4,5) are installed to the ends of the housing. The rotor includes a heating element(20) in which plural heating element sheets are layered. The heating element sheets have the same shape. Linear notches are formed to each heating element sheet. The linear notch of one heating element sheet is situated between the linear notches of other heating element sheets.