baber/WOPTO huggingface dataset:
Patent KR-20020039091-A (KR)
Title: Flat panel display driving apparatus using an alternative common voltage
Inventor: YOON JEONG HWAN
IPC: G09G3/36
Filed: 2000-11-20
Abstract: PURPOSE: A flat display driver using a variable reference voltage is provided to reduce a changing range of a liquid crystal drive voltage by switching a reference voltage. CONSTITUTION: One or more gate line is used for transferring scanning signals. One or more data line is used for transferring data voltage. The gate line and the data line are crossed and insulated to each other. A switching element is surrounded by the gate line and the data line. The switching element is connected with the gate line and the data line. A pixel includes the switching element. A reference voltage generation portion is used for changing periodically a reference voltage for an image signal applied to one end of the pixel. The reference voltage generation portion changes the reference voltage according to one of a frame, a gate line, a data line, and a pixel.
Patent KR-20010051823-A (KR)
Inventor: ISHIGURO SHIGEYUKI
IPC: H05B33/14
Filed: 2000-11-20
Abstract: PURPOSE: To provide an organic EL display device of high quality and low cost that can reduce wire resistance of transparent electrodes and improve sight angle of spectrum, stabilize a process and cut down cost by removing barrier metal layer. CONSTITUTION: The organic EL display device comprises a pair of electrodes, organic layers more than one kind disposed between the electrodes, wherein at least one of the electrodes has a transparent electrode containing indium oxide at a position corresponding to the light emitting part and metallic electrode at other portions. The metallic electrode contains elements more than one or two kinds selected from Ag, Cu or Ag-Cu as a main component and Rh, Pd, In, Pt and Au as a secondary component.
Patent KR-20020040310-A (KR)
Title: Caliper for a disk brake
Inventor: JANG SE IN
IPC: F16D65/02
Filed: 2000-11-24
Abstract: PURPOSE: A caliper of a disk brake is provided to reduce noise and vibration generated between a guide rod and a guide hole by cutting a portion of an arc of the guide rod. CONSTITUTION: A caliper for a disk brake comprises a caliper housing(10) having a cylinder(11) and a piston(20); a carrier(30) surrounding a side portion of a disk by fixed on a chassis; a pad plates attached to both side ends of the disk through the piston by being arranged on an inner portion of the carrier; pads formed on the pad plates; a guide rod(100) controlling movement of the caliper housing by being installed between the caliper housing and the carrier; a guide hole(110) formed on an end portion of the carrier; a recessed unit(112) formed on and portion of the guide hole; an adapter(120) reducing noise and vibration by contacting the guide hole and the guide rod; and a protrusion unit formed on an arc unit of the adapter.
Patent KR-20020043370-A (KR)
Title: Output Circuit of 2-Input Audio Signal
Inventor: KWAK OE SU
IPC: H03G3/30
Filed: 2000-12-04
Abstract: PURPOSE: An output circuit of 2 input audio signal is provided to suitably control audio signals which are inputted to both sides by means of an AGC circuit. CONSTITUTION: Filters(100a,100b) pass necessary bandwidth components such as a high or low frequency component among audio signals which are inputted to both sides. Each of the filters(100a,100b) includes a low pass filter for passing a low frequency component, a high pass filter for passing a high frequency component, and a band pass filter for passing a desired band component. AGC circuits(102a,102b) automatically control gains of the signals from the filters(100a,100b) regardless of input changes. Amplifiers(104a,104b) amplify the signals from the AGC circuits(102a,102b) by predetermined rate. A switch(106) switches the audio signal which are inputted to both sides and connects the audio signals to each element. The switch(106) includes a relay.
Patent KR-20020045962-A (KR)
Title: Golf ball with metal alloy core
Inventor: KIM GANG HYEONG
IPC: A63B37/00
Filed: 2000-12-12
Abstract: PURPOSE: A golf ball with a metal core is provided, thereby minimizing the strain rate of the golf ball, and improving the repulsion and shock-absorption. Therefore, the control and flying distance of the golf ball can be improved. CONSTITUTION: The golf ball consisting of a center core and an outer cover comprises a lattice shaped metal filament between the center core and the outer cover, wherein the metal filament has thickness of 0.5 to 1 micrometer and is monolayered or multilayered, the weight of the metal filament is 15 wt.% or less to the total weight of the golf ball, and the metal filament is peanut shaped sheet or polygonal sheet. An unwoven fiber type metal fiber may be inserted in the inner side of the metal filament, wherein the metal fiber has thickness of 0.05 to 1 micrometer, and the ratio of thickness to length of the metal fiber is 1:100 to 1:2000.
Patent KR-20020046429-A (KR)
Title: Method for forming isolation layer in semiconductor device
Inventor: BYUN JUNG HYEOK
IPC: H01L21/76
Filed: 2000-12-14
Abstract: PURPOSE: An isolation layer formation method of semiconductor devices is provided to prevent a hump due to loss of isolation layer filled into a shallow trench. CONSTITUTION: A first buffer nitride(22), a buffer oxide(23) and a pad nitride are sequentially formed on a semiconductor substrate(21). A trench is formed by etching the substrate using the pad nitride, the buffer oxide and the first buffer nitride as a hard mask. An isolation layer(25a) is formed by filling and polishing a first oxide layer into the trench. A second buffer nitride(26) and a second oxide layer(27) are sequentially formed on the isolation layer. The second oxide layer(27) is polished by using the pad nitride as a stopper. After removing the pad nitride, the buffer oxide(23) and the second oxide layer(27) are removed.
Patent KR-20010062464-A (KR)
Title: Magnetic memory device
Inventor: INOMATA KOICHIRO
IPC: H01L29/96
Filed: 2000-12-15
Abstract: PURPOSE: A magnetic memory device is provided to obtain large signal voltage and large S/N during without increasing power consumption and to contribute to capacity enlargement. CONSTITUTION: The magnetic memory device comprises a memory cell having a first and a second tunnel junction(11, 12) and a cell selecting semiconductor element(31) in which each of the first and a second tunnel junction(11, 12) are formed with a piling layer of a pinned layer in which the direction of magnetization is fixed and a recording layer in which the direction of magnetization is varied by an external magnetic field and the piling layer is provided with single or a plurality of tunnel junctions. The first tunnel junction(11) is provided with a first and a second end part which is arranged opposing to the piling layer and the second junction(12) is provided with a third and a forth end part which is arranged opposing to the piling layer. Further, the device comprises a first data line(DL) connected to the first end part of the first tunnel junction(11), a second data line(/DL) connected to the third end part of the second tunnel junction(12), and a bit line(BL) connecting to the second end part of the first tunnel junction(11) and the forth end part of the second tunnel junction(12) through the cell selecting semiconductor element(31).
Patent KR-20020050985-A (KR)
Title: Recycling Method of Residual Castables for Teeming Ladle
Inventor: HONG GI GON
IPC: F27D1/16
Filed: 2000-12-22
Abstract: PURPOSE: A method for filling residual slip casting castable using calcium oxide and ladle slag is provided to utilize the residual slip casting castable and shorten construction time of new slip casting castable. CONSTITUTION: The method for filling residual slip casting castable using calcium oxide and ladle slag comprises the steps of injecting calcium oxide into slag layer inside a ladle before operation of a tundish and mixing slag with calcium oxide; coating a mixture of slag and calcium oxide on the surface of the residual slip casting castable of the ladle to a lower direction of the surface of molten metal by casting operation; cooling the slag coated ladle to an ordinary temperature after casting operation; and filling new slip casting castable into a slag coating layer inside the ladle, wherein the slag and calcium oxide are mixed in a weight ratio of 10:1-30:1, a thickness of the slag coating layer is 3 to 12 mm, the new slip casting castable has a thickness of 50 to 70 mm and preheated to a temperature ranging from 1000 to 1200 deg.C for filling construction, and an average grain size of the calcium oxide is about 10 mm.
Patent KR-20010022961-A (KR)
Title: 케라틴 섬유의 산화 염색용 조성물 및 이를 사용한 염색 방법
IPC: A61K8/49
Filed: 1999-06-02
Abstract: 본 발명은, 적합한 염색 매질 내에, 피라졸로[1,5-a]피리미딘에서 선택된 하나 이상의 제 1 산화 염기, N,N-비스(β-히드록시에틸)-파라-페닐렌디아민인 제 2 산화 염기 및 메타-아미노페놀, 및 메타-페닐렌디아민에서 선택된 하나 이상의 커플러를 함유하는, 케라틴 섬유, 특히 모발과 같은 인간 케라틴 섬유의 산화 염색용 조성물, 및 상기 조성물을 사용한 염색 방법에 관한 것이다.
Patent KR-20010023571-A (KR)
Title: 페놀수지 발포체
IPC: C08J9/14
Filed: 1998-09-01
Abstract: 오존층 파괴의 염려가 없으며 지구온난화 계수가 낮은 발포제로서 탄화수소를 사용하고, 우수한 단열성능을 갖고, 또 압축강도 등의 기계적 강도가 우수하고, 취약성이 개선된 수지 발포체를 제공한다. 
     즉, 본 발명은 발포제가 탄화수소이고, 독립 기포율 70 % 이상, 평균 기포직경 10 ∼ 400 ㎛, 밀도 10 ∼ 70 ㎏/㎥ 로 열분해 가스 크로마토그래피의 열분해 패턴으로부터 구해지는 열분해 생성물의 트리메틸페놀 A 의 페놀 B 에 대한 면적비 C (C=A/B) 가 하기식 (1) 의 범위에 있는 페놀수지 발포체이다. 
     0.05 ≤C ≤4.0        (1)
Patent KR-20010023846-A (KR)
Title: 기능성 분말이 부착된 구조화 연마재
IPC: B24D11/04
Filed: 1998-09-08
Abstract: 본 발명은 연마 그릿, 충전제, 연삭 조제, 첨가제 및 결합제 수지를 포함하는 제형의 층을 기재에 구조화 연마재의 형태로 부착시킨 다음 구조화 연마재의 표면에 기능성 분말을 부착시킴으로써 수득할 수 있는 매우 미세한 마모 용도에 적합한 피복 연마재에 관한 것이다.
Patent KR-20010031085-A (KR)
Title: 멀티빔 광학 판독 방법 및 장치
IPC: G11B7/085
Filed: 1998-10-09
Abstract: 광픽업(2)은 5개의 상이한 광빔(3 1 내지 3 5 )을 동시에 CD-ROM(1)의 신호면(1A)의 매 2번째 5개의 트랙들에 인가한다.  기록 데이터 판독 시스템은 신호면으로부터 반사된 각각의 광빔의 출력들에 따라 각각의 광빔 시스템에 대해 독립적으로 기록 데이터를 판독하며, 판독된 기록 데이터를 기록 순서로 저장한다.  시스템 제어기의 제어하에, 광픽업(2) 및 기록 데이터 판독 시스템은 CD-ROM(1)의 기록 데이터의 누락없음을 보이는 5개의 광빔의 조합으로, 대략 CD-ROM(1)의 2회전 동안 5개의 광빔 시스템(3 1 내지 3 5 )으로 기록 데이터를 연속하여 판독하는 동작과 이 연속 판독동작 후의 순방향으로의 7개의 트랙 트랙 점프 동작을 번갈아 수행함으로써 CD-ROM(1)의 기록 데이터를 판독한다.
Patent KR-20010031792-A (KR)
Title: 가스로부터 금속 카르보닐 및 수분의 제거 방법 및 장치
IPC: B01D53/72
Filed: 1998-09-10
Abstract: 가스가 약 0.175 볼트 이상의 환원전위를 가진 금속 산화물, 유기금속 산화물 또는 이들의 혼합물과 접촉하는, 가스로부터 금속 카르보닐을 제거하는 방법 및 조성물, 및 가스로부터 수분을 제거하는 조성물.
Patent KR-20010033273-A (KR)
Title: 접는식의 콘테이너
IPC: B65D6/22
Filed: 1998-12-21
Abstract: 조립과 해체 상태가 가능한 접는식의 콘테이너(10)은 베이스(14), 측벽한쌍(34, 36), 선단한쌍(44, 46)으로 구성된다. 베이스(14)는 끝쪽에서 튀어나온선(31)을 나타내고 있는 일체로된 대립상태로 세운 선단 플렌지(24, 26)와 수직으로 된 측면멤버(32)로 구성된다. 모서리 끝에서 대립으로 나타낸 한쌍(16, 18)은 평행을 이룬 평면과 인접한 측면멤버(32)의 같은평면의 한쌍으로부터 안쪽으로 향하여 놓여있다. 그리서 서로 대립한 측모서리끝(16, 18)중 하나에다 회전가능하게 부착된다. 콘테이너(10)은 조립했을때 베이스(14)가 넓게 확장된다. 각 측벽(34, 36)은 각 측면모서리(58, 60, 62, 64)에 한개의 빗장부재(66)를 갖고 있으며, 그 빗장은 하단과 상단이 경사진모양(68, 70)과 말단에 이(74)가 있다. 양 선단벽(44, 46)은 조립상태에서 빗장을 채울 수 있는 부재(82)를 살짝 넣을 수 있는 힌지에 의해서 안전하게 고정된다. 해체상태일때 콘테이너를 포개 놓을 수 있는것이다.
Patent KR-20010033352-A (KR)
Title: Selective silicon oxide etchant formulation including fluoride salt, chelating agent and glycol solvent
IPC: H01L21/308
Filed: 1998-12-16
Abstract: The formulations of the present invention etch doped silicon oxide compounds, such as BPSG and PSG layers, at rates greater than or equal to the etch rate of undoped silicon oxide such as thermal oxide. The formulations have the general composition of a chelating agent, preferably weakly to moderately acidic (0.1-10 %; preferably 0.2-2.8 %); a fluoride salt, which may be ammonium fluoride or an organic derivative of either ammonium fluoride or a polyammonium fluoride (1.65-7 %; preferably 2.25-7 %); a glycol solvent (71-98 %; preferably 90-98 %); and optionally, an amine.
Patent KR-20010041223-A (KR)
Title: 이동 무선 시스템에서의 적응 등화 기술을 위한 향상된 방법
IPC: H04B7/005
Filed: 1999-12-23
Abstract: 본 발명은, 1실시예에 있어서, 디지털 통신 채널의 출력을 적응할 수 있게 등화시키기 위한 방법이, 초기 채널 평가를 생성하는 단계와, 심벌의 시퀀스를 포함하는 수신 입력 신호의 공지된 심벌을 기초로 트렐리스의 메트릭 상태의 초기 세트를 결정하는 단계, 초기 채널 평가 및 수신된 신호에 따라서 메트릭 상태의 세트를 갱신하는 단계, 생존 경로의 세트를 결정하기 위해서, 수신된 신호의 심벌의 지연된 임시 결정을 사용하여 메트릭 상태에 대한 경로의 세트를 갱신하는 단계 및, 갱신 메트릭들과 지연된 임시 결정 및 수신된 신호를 기초로 채널 평가를 갱신하는 단계를 포함한다. 
     이 처리는 심각한 채널 손상 상태하에서, 신뢰할 수 있는 복조 수행을 가능하게 한다.
Patent KR-20010041828-A (KR)
Title: 피복층 성형기 및 그 성형방법
IPC: B05C11/04
Filed: 2000-01-12
Abstract: 부품에 피복층을 형성할 때의 도료액을 최소로 하고, 피복층의 성형면의 치수 정밀도를 양호하게 하는 피복층 성형기를 제공한다.  피복층 성형기는 회전 지지장치(2), 공급부(15), 층 형성장치(20), 및 도료 제거수단(30)을 구비하고, 피복층을 성형하는 도포 형성부(21)의 경사각(θ)을 피복면(D)의 도료(B)의 회전 접선방향(P)에 대하여 30°~ 70°로 유지하며, 도료 제거수단(30)에 의해 도포 형성부(21)에 부착된 잉여 도료액(E)을 제거한다.
Patent KR-20010043211-A (KR)
IPC: A61F13/472
Filed: 1999-04-30
Abstract: An absorbent interlabial device worn by female wearers for catamenial purposes, incontinence protection, or both, is disclosed. The absorbent interlabial device has at least one body-contacting surface which comprises a substance that contacts the wearer's body for assisting the interlabial device in staying in place in the desired position in the interlabial space. The substance can be either adhesive or non-adhesive. In embodiments in which the substance is non-adhesive, it may have no initial tack so that it will not stick to the wrong portions of the wearer's body when the device is placed between the labia. Non-adhesive substances include moisture-activated substances which become viscous and develop a tack when contacted by relatively small amounts of moisture.
Patent KR-20010043837-A (KR)
IPC: G10L21/0208
Filed: 1999-05-27
Abstract: Methods and apparatus for providing speech enhancement in noise reduction systems include spectral subtraction algorithms using linear convolution, causal filtering and/or spectrum dependent exponential averaging of the spectral subtraction gain function. According to exemplary embodiments, low order spectrum estimates are developed which have less frequency resolution and reduced variance as compared to spectrum estimates in conventional spectral subtraction systems. The low order spectra are used to form a gain function having a desired low variance which in turn reduces musical tones in the spectral subtraction output signal. Advantageously, the gain function can be further smoothed across blocks using input spectrum dependent exponential averaging. Additionally, the low order of the gain function permits a phase to be added during interpolation so that the spectral subtraction gain filter is causal and prevents discontinuities between blocks.
Patent KR-20010105147-A (KR)
IPC: F02C7/28
Filed: 2001-01-12
Abstract: A leaf seal assembly (80) is secured to the trailing edge of a shroud segment (68) for sealing between the shroud segment and the leading edge side wall of a nozzle outer band (90). The leaf seal includes a circumferentially elongated seal plate biased by a pair of spring clips (86) disposed in a groove (82) along the trailing edge of the shroud segment to maintain the seal plate in engagement with the flange (88) on the leading edge side wall of the nozzle outer band. The leaf seal plate and spring clips receive pins (89) tack-welded to the shroud segment to secure the leaf seal assembly in place. <IMAGE>
Patent KR-20020000101-A (KR)
Title: System and method for providing religious information using wireless internet
Inventor: LEE GYEONG HOE
IPC: G06Q50/10
Filed: 2001-01-18
Abstract: PURPOSE: A system and a method for providing religious information using radio Internet are provided to be capable of providing information specified and classified by respective religious communities through radio Internet using various mobile communication terminals such as a cellular phone, a PDA, etc. CONSTITUTION: A web server(100) comprises a service management module(106), a communication module(108), an information DB(114) and a membership DB(112). The service management module(106) manages various services providing to a client(120). The communication module(108) transmits and receives data through radio Internet. The religion related information from the client(120) are stored in the information DB(114). The information related to the client(120) are stored in the membership DB(112). The web server(100) may further comprise a membership joining module(102) and a member certification module(104).
Patent KR-20020062500-A (KR)
Title: Charging apparatus
Inventor: LEE IK JAE
IPC: B65B9/10
Filed: 2001-01-22
Abstract: PURPOSE: A stick pack charging apparatus is provided to fill contents, seal package firmly and print actively by manufacturing the package successively with simplifying the packing apparatus and by reducing process with cutting the package conveniently. CONSTITUTION: A charging device of a stick pack is composed of a packing paper supply unit(3) winding and feeding packing paper(2) at the side of a support; a print unit(4); a charge unit(5) charging contents; a cutting unit(6) cutting for separating packing paper; a forming unit(7) making the cylinder of packing paper from the cutting unit; a reinforcing piece supply unit(8) feeding a reinforcing piece to a middle adhesive part of the packing paper; a sealing unit(9) sealing the middle of the packing paper in the lower part of the forming unit; a driving unit actuating the sealing unit; a cutting unit(11) sealing the end of the packing paper and cutting the sealed packing paper; and a holding unit(14) holding the packing paper in filling with contents, and transferring the finished bag. The cutting unit cuts the upper and lower sealing parts of the packing paper, and a folding unit folds the part of the sealing part. The bag is manufactured with dividing packing paper, and the packing paper is sealed with filling with contents. Packing is performed conveniently with cutting and sealing simultaneously.
Patent KR-20020037247-A (KR)
Inventor: FUKUMOTO MASAAKI
IPC: G03G15/20
Filed: 2001-02-06
Abstract: PURPOSE: To provide a thermostat that will not cause the monitoring object to wear out, even if it is a moving body and moreover has a superior thermal response. CONSTITUTION: This is a thermostat TH, comprising a nearly disk shape bimetal 3 that turns over, when the critical temperature is exceeded, a support member 2 that supports the bottom face of the bimetal 3 and a cap member 7 that supports the top face of the bimetal 3. An open hole 7a that does not impair supporting of the bimetal 3 is provided at the cap member 7, and it supports the bimetal 3 at the part that protrudes inward in the direction of the diameter.
Patent KR-20010082615-A (KR)
Title: Spectrum spread communication synchronization establishing apparatus using frequency offset and receiver with the same
Inventor: KUMURA TAKAHIRO
IPC: H04B1/707
Filed: 2001-02-14
Abstract: PURPOSE: To stably acquire synchronization even under an environment where a frequency offset and noise coexist. CONSTITUTION: In a synchronization circuit 100, received signals from an antenna are converted to base band signals in a local oscillator 1 and an LPF 2 and sampled in an S/H 3, a correlation value for which the spread code of the received signals and the symbol are multiplied is obtained in a correlation device 4 and a power value for which the plural symbols are added is obtained while inversely modulating the correlation value and correcting phase rotation by the frequency offset based on the theoretical value of the symbol corresponding to the correlation value or a judgment value after demodulation in a symbol integrator 5. A path search part 10 adds the power value for plural slots and a demodulation path selection part 12 selects a reception timing from the ones for which power added values inputted from the path search part 10 are selected in a descending order and outputs it. A frequency offset estimation part 11 selects a valid path from the correlation value outputted by the correlation device 4 by using demodulation path timing information obtained from the demodulation path selection part 12, estimates the frequency offset and supplies it to the symbol integrator 5.
Patent KR-20010085515-A (KR)
Title: Communication system, communication device and communication method
Inventor: AOKI YUKIHIKO
IPC: H04L12/64
Filed: 2001-02-23
Abstract: PURPOSE: A communication system is provided to reduce the load of data transfer between devices connected to a serial bus at the time of exchange data stream through a network having the serial bus. CONSTITUTION: The communication system is provided with a serial bus(4) that transmits data, a magneto-optical disk(1) and an optical disk(2) that transmit data as a periodic isochronous packet to the serial bus(4), and an amplifier(3) that monitors the transmission of the isochronous packet from the magneto-optical disk(1) and the optical disk(2) via the serial bus(4) and starts reception of the isochronous packet via the serial bus when detecting the transmission of the available isochronous packet.
Patent KR-20020069590-A (KR)
Title: a management system for forwarding input or output goods and method thereof
Inventor: JUNG TAE JIN
Filed: 2001-02-26
Abstract: PURPOSE: A system and a method for managing the relay of the import/export logistics are provided to enable an owner or a forwarder to select an overseas local logistics company through the search of the local logistics information, to process the document works electronically, and to transfer the tracking information of the freight. CONSTITUTION: The system includes a member information DB(1a), an order information DB(1b) and an operation information DB(1c). A logistics management server(1) receives a request for the freight transportation from the freight owner computer(2). The logistics management server has a program executing an overseas local logistics relay service routine, executing the freight transportation process by setting the freight transportation operation between the property owner and the forwarder, executing an electronic document support service routine for carrying out the entry and insurance business through the communication with an entry company computer(4) and an insurance company computer(5), and executing a property tracking information providing service routine through the communication with a forwarder computer(3).
Patent KR-20010067650-A (KR)
Title: Korean medicine agriculture a method
Inventor: KIM JOA HWAN
IPC: C05F11/08
Filed: 2001-02-28
Abstract: PURPOSE: A method for preparing a fertilizer for agricultural crops from medicinal herbs is provided thereby, fertilizer, which is helpful for producing safe agricultural crops, is prepared. CONSTITUTION: The manufacturing method thereof comprises the steps of: (i) extracting medicinal ingredients from medicinal herbs by applying heat thereto or precipitating the medicinal herbs in water to obtain a medicinal liquid; (ii) after putting aerobic microbes or anaerobic microbes, or common anaerobic microbes in the extract or the obtained medicinal liquid of the step (i), fermenting it for certain period of time; and (iii) filtering the fermented solution of the step (ii).
Patent KR-20010090465-A (KR)
Title: Numerical controller for roll grinding machine
Inventor: KUNUGI TAKASHI
IPC: B23Q17/20
Filed: 2001-03-16
Abstract: PURPOSE: To provide a numerical control system for a roll grinding machine, capable of automatically and efficiently performing grinding until flaws are eliminated by automating a series of processes from detecting of the flaws of the roll to grinding. CONSTITUTION: The numerical control system is provided with a means having a flaw detecting head 23 for detecting flaws generated on the front surface of a roll 11, and for detecting the flaws over the whole roll 11; a means for issuing a cutting command for repairing respective flaws on the basis of flaw information in which the positions and the levels of respective detected flaws are specified; a control means for performing positional control for a Z axis for moving a wheel spindle stock in the axial direction of the roll on the basis of the cutting command and positioning it in the corresponding flaw position and positional control for an X axis for cutting the grinding wheel in the roll radial direction at the position, and a judging means for judging that the flaws in the flaw position are eliminated, and skipping to a next cutting command.