baber/WOPTO huggingface dataset:
Patent KR-20030049207-A (KR)
Title: Compositions for wrap film and method for preparing wrap film using the same
Inventor: CHAE SEONG SEOK
IPC: C08J5/18
Filed: 2001-12-14
Abstract: PURPOSE: Provided are a wrap film composition comprising a polypropylene-based resin and a styrene-based copolymer resin, which has excellent adhesive property and transparency and prevents the danger of environmental endocrine disruptors, and a process for producing a wrap film by using the composition. CONSTITUTION: The wrap film composition comprises: 30-80wt% of the polypropylene-based resin having a melt index of 3.0-15g/10min, which is ethylene-propylene copolymer containing 2-5wt% of ethylene or ethylene-propylene-butene copolymer containing 2-5wt% of ethylene-butene; 20-70wt% of the styrene-based copolymer resin having a melt index of 1.0-10.0g/10min and a density of 0.87-0.92g/cm3, which is styrene-ethylene-butylene copolymer containing 10-30wt% of styrene. And the wrap film is produced by molding the composition at 180-250deg.C to have a thickness of 8-20 micrometer by using a T-die.
Patent KR-20030050169-A (KR)
Title: A key-inputting apparatus for a personal mobile telephone
Inventor: LEE BYEONG GON
IPC: H04B1/38
Filed: 2001-12-18
Abstract: PURPOSE: A key input device for a portable terminal is provided to prevent an error input of a key by seeing one function among several functions, and selecting and operating the function by one button. CONSTITUTION: A key input change plate(2) has a plurality of function display units which are located on a certain contact point portion(1b) of a PCB(1) and are arranged for performing another function according to a selected mode. A key input switching member including guide long holes, an asperity flap, a guide asperity, and a knob performs a key input function corresponding to a mode selected after the key input change plate(2) slides on the PCB(1). A button pad(4) has buttons in a location corresponding to the location of the function display units of the key input change plate(2).
Patent KR-20030050711-A (KR)
Title: Apparatus for cooling the bottom part of blast furnace
Inventor: KIM GAP YEOL
IPC: C21B7/10
Filed: 2001-12-19
Abstract: PURPOSE: A double cooling apparatus of the bottom part of blast furnace is provided which is capable of securing life cycle of the blast furnace by more stably maintaining bricks of the bottom part of the blast furnace in which molten metal produced by blast furnace operation is gathered. CONSTITUTION: In a cooling system for cooling refractories of the bottom part of blast furnace, the double cooling apparatus of the bottom part of the blast furnace comprises lower cooling pipes(3) arranged in the lower part of the bottom plate of the blast furnace; and upper cooling pipes(6) arranged in the upper part of the bottom plate of the blast furnace, the cooling pipes(3,6) are supported by the refractories with being surrounded by the refractories, wherein the refractories surrounding the upper cooling pipes(6) of the bottom of the blast furnace are formed of graphite(7), and the refractories surrounding the lower cooling pipes(3) of the bottom of the blast furnace are formed of alumina concrete, wherein a plurality of the lower and upper cooling pipes are arranged perpendicularly to each other, and wherein temperature of upper cooling pipes near the center of the bottom part of the blast furnace is higher than temperature of upper cooling pipes distanced from the center of the bottom part of the blast furnace.
Patent KR-20030052856-A (KR)
Title: Device for mounting handle for refrigerator
Inventor: KANG WON SIK
IPC: F25D23/02
Filed: 2001-12-21
Abstract: PURPOSE: A handle-mounting device of a refrigerator is provided to reduce the material cost by reducing exposed portions and to prevent distortion and bending between parts for mounting a handle. CONSTITUTION: A handle-mounting device of a refrigerator comprises a mounting ring member(70) forming a guide groove(74), and a handle base(60) including an insertion part(64) inserted into the inside of the mounting ring member and a door contact part(62) fixed to a door front(40). Both ends of a handle for opening and shutting a door are inserted to the mounting ring member. The handle base forms a guide protrusion protruded in the insertion direction and inserted in the guide groove. The handle base and the mounting ring member are combined by the guide protrusion and the guide groove. Accordingly, the combining of the handle and the mounting ring member is easily formed and distortion of the handle and the mounting ring member is prevented.
Patent KR-20030055711-A (KR)
Title: Inverter for back-light of LCD
Inventor: MIN BYEONG UN
IPC: H05B41/285
Filed: 2001-12-27
Abstract: PURPOSE: An LCD backlight inverter is provided to prevent a malfunction at an initial drive operation while performing a stable output control operation against a variation of an input voltage when opening a corresponding lamp in case of using two or more lamps. CONSTITUTION: A filter circuit receives and filters a feedback signal for sensing a magnitude of a voltage according to an on/off state of each backlight lamp. A rectification circuit rectifies feedback signals output from the filter circuit into DC currents. A switch control circuit is configured to control an on/off state of a buck switch. A transistor(Q10) has a base terminal connected to receive the feedback signal based on the on/off state of each backlight lamp from the rectification circuit and performs an on/off operation according to a voltage state of the base terminal. The transistor is configured to shut down the switching control circuit at an off-operation.
Patent KR-20030055795-A (KR)
Title: Method of manufacturing semiconductor device
Inventor: JUN BEOM JIN
IPC: H01L21/31
Filed: 2001-12-27
Abstract: PURPOSE: A method for manufacturing a semiconductor device is provided to be capable of preventing electrical short between a bit line and a gate due to over-etching of a buffer oxide layer. CONSTITUTION: A stacked gate(25) including a gate oxide layer(22), a gate conductive layer(23) and a hard mask(24), is formed on a semiconductor substrate(21). A buffer oxide layer(26) is formed on the stacked gate(25) and the substrate(21). A photoresist layer is coated on the buffer oxide layer(26) to entirely fill the stacked gate(25). The photoresist layer is blanket etched so as to the buffer oxide layer located on the hard mask(24). The exposed buffer oxide layer and the remaining photoresist layer are removed. A nitirde spacer(28a) is formed at both sidewalls of the remaining buffer oxide layer(26) and the exposed hard mask.
Patent KR-20030056474-A (KR)
Inventor: SHIN HYEON JONG
IPC: A61K9/24
Filed: 2001-12-28
Abstract: PURPOSE: A new sustained release tablet composition as a matrix type or single drug administration system containing carbidopa and levodopa as an active component is provided. The sustained release tablet composition exhibits an elution rate of about 60% within 1 hour and 90% or more within 2 hour after administration. Therefore, it uniformly and slowly releases an active ingredient. CONSTITUTION: Carbidopa and levodopa are blended with 0.5 to 5% by weight of Eudragit RL-30D or Eudragit RL-100 and the mixture is added with purified water, dried at 50deg.C in a fluidized bed drier for 30min, mixed with a lubricating agent and tabletted. For an example, 16.7% by weight of carbidopa(anhydride) USP is blended with levodopa KP, 13.0% by weight of lactose, 1.6% by weight of Eudragit RL-30D, 1.0% by weight of talc and 1.0% by weight of magnesium stearate and dried at 50deg.C for 30min.
Patent KR-20030058284-A (KR)
Inventor: KWAK NO JEONG
IPC: H01L21/28
Filed: 2001-12-31
Abstract: PURPOSE: A method for forming a metal contact of a semiconductor device is provided to be capable of obtaining stable contact resistance by forming a barrier metal film using PVD and CVD and simplifying processes without using RTP(Rapid Thermal Processing). CONSTITUTION: After forming an insulating layer(2) on a silicon substrate(1), a contact hole is formed by selectively etching the insulating layer(2). A Ti film(4) is firstly deposited on the resultant structure including the contact hole by using PVD(Physical Vapor Deposition). A Ti film(5) and a TiN layer(6) are sequentially deposited on the Ti film(4) by using CVD(Chemical Vapor Deposition).
Patent KR-20030058418-A (KR)
Title: METHOD OF CONTROLLING InGaAs/GaAs QUANTUM DOTS ENERGY BANDGAP BY THE COMBINATION OF DIELECTRIC CAPPING LAYER IN QUANTUM DOTS INTERMIXING
Inventor: CHO UN JO
IPC: H01L29/15
Filed: 2001-12-31
Abstract: PURPOSE: A method for controlling an energy band gap of InGaAs/GaAs quantum dot by combination of a dielectric capping layer in a quantum dot disorder method is provided to form different band gap regions on the same InGaAs/GaAs quantum dot substrate by coating a dielectric capping layer on a quantum dot structure and performing a thermal process. CONSTITUTION: A method for controlling an energy band gap of InGaAs/GaAs quantum dot by using a dielectric capping layer includes a dielectric combination formation process and an energy band gap formation process. The dielectric combination formation process is to form a dielectric combination on a quantum dot substrate by using SiNx and SiO2 as the dielectric capping layer. The quantum dot substrate having a different energy band gap is formed by performing a thermal process for the quantum dot substrate.
Patent KR-20030058427-A (KR)
Inventor: HYUN SANG SOO
IPC: A63F7/06
Filed: 2001-12-31
Abstract: PURPOSE: Provided is soccer game machine in which a user plays a free kick soccer game by controlling the strength of a shooting ball in a case equipped with a goal keeper and a shooter in front at a certain distance from the goal keeper. A shooter is awarded with present whenever goal is in or with a card which is exchangeable with a doll when a certain number of the cards are obtained. CONSTITUTION: The machine comprises a certain sized case in which are located a display part(8) to show the score, a coin insert hole, a card issuing part to issue a certain card, left and right keys(3,4), an advancing key(5) and a shooting key(6) for playing game. A goal post is placed at horizontal plane plate in a case and a goal keeper is placed in front of goal post. A ball positioning part is placed at a certain distance from goal keeper.
Patent KR-20010083105-A (KR)
Title: Personal communication and positioning system
IPC: G01C21/34
Filed: 1999-07-09
Abstract: A location tagged data provision and display system. A personal communication device, or PCD (20), with electromagnetic communication capability (29C, 29D, 29E, 29N) has a GPS receiver (243) and a display (28a). The PCD requests maps (219) and location tagged data from data providers and other for display on the PCD. The data providers respond to requests by using searching and sorting schemes to interrogate databases (245) and then automatically transmitting data responsive to the requests to the requesting PCD.
Patent KR-20010085307-A (KR)
Title: Nucleic acids encoding a g-protein coupled receptor involved in sensory transduction
IPC: C12P21/08
Filed: 1999-07-27
Abstract: The invention provides isolated nucleic acid and amino acid sequences of sensory cell specific G-protein coupled receptors, antibodies to such receptors, methods of detecting such nucleic acids and receptors, and methods of screening for modulators of sensory cell specific G-protein coupled receptors.
Patent KR-20010072161-A (KR)
Title: 개선된 레이저 광선을 생산하는 장치 및 방법
IPC: B23K26/06
Filed: 1999-07-09
Abstract: 본 발명은 재료 표면 프로세싱에 유용한 개선된 레이저 광선과 개선된 레이저 광선을 생산하는 장치에 대한 것이다. 본 발명의 개선된 레이저 광선은 중앙부에서 보다는 외곽부에서 더욱 강력한 출력 분포를 포함한다. 본 발명은 레이저 광선의 초점을 맞추고/맞추거나 레이저 광선을 재료 표면 프로세싱에 유용한 새로운 프로파일로 형성하기 위해 정렬된 출력 구형 및 원통형 광학요소를 포함하는 장치를 포함한다. 본 발명은 더욱이, 이하 "LISI"라고 부르는 레이저에 의한 표면 개선(Laser induced surface improvements)을 생성하기 위해 레이저 광선을 초점을 맞추고/맞추거나 레이저 광선을 형성하는 장치를 사용하는 방법을 포함한다.
Patent KR-20010087358-A (KR)
Title: Electrically conductive pipe clip or cable clip
IPC: H01R4/66
Filed: 1999-09-13
Abstract: The arrangement has a base body (4) for application to the body to be contacted and a contact element held on a side of the base body facing the body to be contacted when in the mounting position. An adjustment arrangement (28,30,32) is used to adjust the contact element in its position relative to the edges (24,26) of the base body.
Patent KR-20010079842-A (KR)
Title: Method for Treating Atherosclerosis Employing an aP2 Inhibitor and Combination
IPC: A61K31/403
Filed: 1999-09-13
Abstract: A method is provided for treating atherosclerosis and related diseases, employing an aP2 inhibitor or a combination of an aP2 inhibitor and another antiatherosclerotic agent, for example, an HMG CoA reductase inhibitor such as pravastatin.
Patent KR-20010075568-A (KR)
IPC: A61K9/12
Filed: 1999-10-07
Abstract: 본 발명은 인간 환자의 폐로 활성 약물 제제를 송달하기 위한 방법 및 장치에 관한 것이다. 활성 약물 제제는 건조 분말형일 수 있거나, 분무될 수 있으며, 또는 분사제와 함께 혼합될 수 있다. 이 활성 약물 제제는 환자에게 초기에 낮은 흡기 유동 속도로 송달되어 활성 약물의 생체이용률을 증가시킨다.
Patent KR-20010075673-A (KR)
IPC: A61P25/14
Filed: 1999-11-01
Abstract: 본 발명은 화학식 (I)의 화합물 및 약제학상 허용되는 그의 유도체를 제공한다. 
     <화학식 I> 
     
       
     
     상기 식에서, R 0 및 R 1 은 독립적으로 H, 할로겐, C 1-6 알킬, C 1-6 알콕시, 또는 1개 이상의 불소 원자에 의해 치환된 C 1-6 알콕시로부터 선택되고, R 2 는 H, C 1-6 알킬, 1개 이상의 불소 원자에 의해 치환된 C 1-6 알킬, C 1-6 알콕시, C 1-6 히드록시알킬, SC 1-6 알킬, C(O)H, C(O)C 1-6 알킬, C 1-6 알킬술포닐, 또는 1개 이상의 불소 원자에 의해 치환된 C 1-6 알콕시이며, R 3 는 C 1-6 알킬 또는 NH 2 이다.  화학식 (I)의 화합물은 효능있고 선택적인 COX-2 억제제이고, 통증, 열, 다양한 염증 증상 및 질환의 치료에 유용하다.
Patent KR-20010107972-A (KR)
IPC: B29C51/08
Filed: 1998-11-18
Abstract: 본 발명은 충전된 용기를 제조하는 방법에 관한 것으로서, 상기 방법은 압축 성형, 블로우 성형 및 충전하는 단계를 포함하고, 상기 단계가 물리적으로 인접한 공정으로 연속적으로 수행된다.
Patent KR-20020000140-A (KR)
IPC: C07C273/18
Filed: 2000-02-14
Abstract: 화학식 I을 갖는 2-(N,N-2치환된)아미노-4-(퍼플루오로- 알킬)-1,3-옥사진-6-온 화합물을 제조하기 위한 개선된 방법 및 중간체, 그리고 화학식 V를 갖는 6-(퍼플루오로알킬)우라실 화합물을 제조하기 위한 개선된 방법.
Patent KR-20010113714-A (KR)
Title: Plasma-assisted processing of gaseous media
IPC: B01J19/08
Filed: 2000-02-28
Abstract: A reactor for the plasma-assisted processing of a gaseous medium, including a pair of electrodes having facing surfaces the separation of which is substantially uniform, with a body of dielectric material positioned between them and defining a plurality of gas passages extending through the space between the electrodes.
Patent KR-20010103033-A (KR)
IPC: H05G1/62
Filed: 2000-03-02
Abstract: 본 발명은 그리드 전압 제어부(110)에 의해 X선관(11)의 제 1 그리드 전극(71)에 인가되는 전압은, 피검사 대상물(5)이 X선 이미지 인텐시파이어(2)에 있어서의 촬상 범위(X선원(1)으로부터의 X선의 조사범위)에 없고, 펄스 발생기(105)로부터 출력되는 펄스가 오프 상태일 때에는, 부전압 발생부(112)으로부터의 소정의 부전압를 기준으로 제어되며, 피검사 대상물(5)이 X선 이미지 인텐시파이어(2)에 있어서의 촬상 범위(X선원(1)으로부터의 X선의 조사범위)에 있으며, 펄스 발생기(105)로부터 출력되는 펄스가 온 상태일 때에는, 기준 전압 발생부(115)로부터의 기준의 정전압을 기준에 제어되게 되고, 컷 오프 전압 및 그리드 동작 전압의 양자와도 안정한 상태로 인가된다.
Patent KR-20010108296-A (KR)
IPC: A61K45/06
Filed: 2000-03-02
Abstract: Methods and preparations for treating disorders of the eye and/or causing posterior vitreous disconnection or disinsertion. Preparations containing (a) urea, (b) urea derivatives (e.g., hydroxyurea, thiourea), (c) a non-steroidal anti-inflamatory agent, (d) antimetabolites, (e) urea, urea derivatives, non-enzymatic proteins, nucleosides, nucleotides and their derivatives (e.g., adenine, adenosine, cytosine, cytadine, guanine, guanitadine, guanidinium, thymidine, thimitadine, uradine, uracil, cystine), uric acid, calcium acetal salicylate, ammonium sulfate or other compound capable of causing non-enzymatic dissolution of the hyaloid membrane or (e) any of the possible combinations thereof, are administered to the eye in therapeutically effective amounts.
Patent KR-20020001776-A (KR)
IPC: G01K13/08
Filed: 2000-03-06
Abstract: 본 발명은 전기 고압 기계(41)에 관한 것이다.  온도, 특히 회전자 권선(49) 또는 고정자 권선(43)의 온도는 반도체 칩(7)을 사용하여 간단하게, 그리고 유리한 가격으로 신뢰도있게 측정된다.  또한 본 발명은 상응하는 온도 측정 방법에 관한 것이다.
Patent KR-20020027303-A (KR)
IPC: C09D175/04
Filed: 2000-03-21
Abstract: 본 발명은 자체 가교결합성 폴리우레탄, 폴리우레탄 폴리우레아 또는 폴리우레아 분산액, 상기 분산액의 제조 방법 및 이의 용도에 관한 것이다.
Patent KR-20020095019-A (KR)
Title: 거품 분배용 패킷
IPC: A45D40/00
Filed: 2000-03-22
Abstract: 본 발명은 하나 이상의 가요성 벽이 있고, 내부 챔버 및 이 챔버와 연결되어 통하는 파우치 개봉시의 거품 분배용 채널을 포함하는, 거품 분배용 패킷을 제공한다.  발포성 유체 뿐만 아니라 스폰지가 챔버 내에 배치되어 있다.  단속적으로 누르는 압력이 파우치의 벽에 가해져 스폰지를 압박하는 경우, 거품이 개봉된 패킷으로부터 방출된다.
Patent KR-20020018688-A (KR)
Inventor: YOON SEOK NAM
IPC: A47G19/02
Filed: 2002-01-10
Abstract: PURPOSE: Provided is a stone dish which serves water and biostone in a dish and rapidly cools to form an ice layer so that it helps to keep coolness in the dish until eating a dish of sliced raw fish. CONSTITUTION: The stone dish is characterized by comprising the parts of: a main body(10) which is made from stone with forming a girth part(11) and a floor part(13) wherein the floor part includes a groove(12); a biostone(20) which is added wherein other materials like ceramic and bamboo are desirably added; and an ice layer(30) which is placed in the groove.
Patent KR-20030061476-A (KR)
Inventor: BAE JONG GEUN
IPC: G06F3/0354
Filed: 2002-01-14
Abstract: PURPOSE: A stylus for an information terminal is provided to easily input the stylus in the small information terminal by making the stylus into a two-stage structure, and to make a user easily use the stylus by extending the stylus to a constant length. CONSTITUTION: The stylus includes a stylus pen(21) and a stylus cap(31). One end of the stylus pen(21) is equipped with a contact part contacting with a touch screen of the information terminal, and other end is equipped with a guide shaft(25) extending to the constant length. The stylus cap(31) is moved along the guide shaft(25) of the stylus pen(21) by forming a guide hole inserted into the guide shaft(25) along a lengthwise direction on the stylus cap(31).
Patent KR-20030062989-A (KR)
Title: system of diagnosis degradation in power transfer apparatus
Inventor: BAEK JU WON
IPC: G01R31/12
Filed: 2002-01-22
Abstract: PURPOSE: A system for diagnosing the deterioration of a power converting device is provided to allow user to confirm the deterioration diagnosis at the operating state of the power converting device and to monitor the deterioration diagnosis data through Internet in remote. CONSTITUTION: A system for diagnosing the deterioration of a power converting device includes an input voltage current detector(150), an output voltage current detector(180) and a data analyzing device(160). In the system, the input voltage current detector(150) detects the voltage and the current of the converter inputting the power into the power converting device and the output voltage current detector(180) detects the voltage and the current of the inverter inputting the power into the power converting device. And, the data analyzing device(160) diagnosis the deterioration state in the power converting device based on the voltage and the current information detected at the input voltage current detector(150) and the voltage and the current information detected at the output voltage current detector(180). Therefore, the data analyzing device(160) analyzes the hysteresis data generated by the diagnosis.
Patent KR-20030064592-A (KR)
Inventor: BARK SAN GEUN
IPC: H04M1/64
Filed: 2002-01-28
Abstract: PURPOSE: A portable phone including a function to deliver voice stored in a memory is provided to store voice data having mutually different contents in many areas of a memory, so as to transmit the stored contents to a called party according to pressed numerical keys. CONSTITUTION: A voice data transmitting unit transmits voice data pre-stored in a memory by inputting a specific key when a call is received from a called party, without directly transmitting the voice data by a user of a mobile phone. A displaying unit summarizes contents of the voice data pre-stored in the memory by the mobile phone user, to display the contents of the voice data on a display window according to areas. And a character displaying unit displays the voice data pre-stored in the memory on the display window according to groups in character.
Patent KR-20030067152-A (KR)
Title: Cooling apparatus for electro-photographic image-forming device
Inventor: AHN BYEONG SEON
IPC: G03G21/20
Filed: 2002-02-07
Abstract: PURPOSE: A cooling device of an electro-photographic image forming system is provided to decrease the temperature of the main body of the system without increasing the temperature of a developing device to maintain high picture quality. CONSTITUTION: A cooling device of an electro-photographic image forming system(200) includes a cooling fan(271), the first opening(272) and the second opening. The cooling fan is installed at one of two frames for supporting a fixing device(240), which face each other, to discharge internal air of the image forming system. The first opening is formed in the frame opposite to the frame at which the cooling fan is set. External air flows into the system through the first opening. The first opening is placed between a developing device(220) and the fixing device. The second opening is formed at the frame at which the cooling fan is installed. External air flows into the system through the second opening. The second opening is located between the developing device and the fixing device.
Patent KR-20020067016-A (KR)
Inventor: KIM DO WON
IPC: C07C213/00
Filed: 2002-02-09
Abstract: PURPOSE: Provided are a monomer for synthesizing a dendrimer, a dendrimer resin which has not problems associated with reactivity and steric hindrance occurred in synthesizing dendrimer, and a method for preparing the same. CONSTITUTION: The monomer has a structure represented by formula 1. In the formula 1, n1, n2 and n3 are an integer of 1-5, and P represents a protecting group having reactivity with amine group. The protecting group is tert-butoxycarbonyl. The dendrimer resin consists of a resin support having amine terminal group; an oligodendrimer layer of formula 2 which is formed by reacting the amine terminal group of the resin support with isocyanate group of monomer of formula 1; and a dendrimer resin layer which is formed by reacting the amine terminal group of the oligomer dendrimer layer with isocyanate group of formula 1.
Patent KR-20030069721-A (KR)
Title: Apparatus for blocking ambient air of electrodless lighting system
Inventor: SEO SEONG TAE
IPC: H01J17/20
Filed: 2002-02-22
Abstract: PURPOSE: An external air cut-off device is provided to protect a light emitting space from foreign substances and a mesh screen from damages, while achieving improved safety and reducing maintenance costs. CONSTITUTION: An external air cut-off device comprises a waveguide(40) having a shaft hole(42) for passage of a bulb shaft(55); a bulb motor(53) mounted in rear of the waveguide and connected to a bulb(50) disposed in front of the waveguide through the bulb shaft so as to rotate the bulb; and a closing unit interposed between the bulb motor and the waveguide, and which prevents an external air from flowing toward the bulb. The closing unit includes a hole forming pipe(43) extended from the front of the waveguide toward the bulb motor so as to form the shaft hole; and a packing member interposed between the hole forming pipe and the bulb motor.
Patent KR-20020030046-A (KR)
Inventor: LEE HI MAN
IPC: B23P15/00
Filed: 2002-02-20
Abstract: PURPOSE: A method for fabricating an iron pallet for forming a cement product such as a block and a brick is provided which reduces production cost by producing the iron pallet for forming the cement product having a relatively high precision in an automated production line. CONSTITUTION: The method for fabricating an iron pallet for forming a cement product such as a block and a brick is characterized in that an iron plate is fabricated into the iron pallet in the cold operation state through the total processes using shearing machine, corner processing press, side surface rolling apparatus or grinder, leveler and grinder, wherein burr on cut and fractured surfaces of the iron plate is removed by using widthwise and lengthwise side surface rolling rolls having two or more stepped profile shapes.