baber/WOPTO huggingface dataset:
Patent KR-20000032136-A (KR)
Title: Method of concentrative control of multi-boiler with single room controller
Inventor: BAEK SEONG HAK
IPC: F24H1/00
Filed: 1998-11-13
Abstract: PURPOSE: A method is provided to control the concentration of plural boilers installed on each floor from a remote area with a single room controller. CONSTITUTION: A gas boiler is controlled by the steps of: sequentially showing a menu for setting a control object, an action mode and tapping temperature to an LCD unit if a user pushes a function switch of a room controller; transferring the data inputted through a key input unit to plural boilers connected to the room controller; controlling the drive of the boilers according to the transferred data and transferring the action consequence of the boilers to the room controller if an identification code included in the transferred data is equalized with self-identification code; and displaying the drive state of the boilers to the display unit according to the transferred data.
Patent KR-20000032466-A (KR)
Title: Hair growth agent
Inventor: OH HEUNG GI
IPC: A61K8/97
Filed: 1998-11-14
Abstract: PURPOSE: A hair tonic using red ginseng, water, alcohol and crossed is provided which nourishes hair and prevents depletionas well as helps hair growing by being applied on the scalp. CONSTITUTION: A hair tonic comprises 1800-2200 ml of water, 230-270 ml of alcohol, 1-1.5 of Citroseed and 1-1.5 g of red ginseng, and additionally 7-8 g of mixed substance consists of 0.05-0.1 of Glycyrrhizae radix, glucose, galactose and vitamin C.
Patent KR-20000033370-A (KR)
Title: Copper foil for printed circuit board
Inventor: LEE JI YOUNG
IPC: H05K3/00
Filed: 1998-11-23
Abstract: PURPOSE: A copper foil for a printed circuit board is provided to improve an etching property, prevent a grey spot from being generated to gain a clean substrate surface, remove a undercut phenomenon in an etching process, prevent an adhesion force by permeation of a hydrochloric acid from being reduced. improve a physical property such as thermostability, property enduring hydrochloric acid, and property enduring the boiling, and, always, keep a strong adhesion force. CONSTITUTION: A copper foil for a printed circuit board has a Ni-Mn-Mo gilt layer comprising Mn(1.5-7.0%) and Mo(0.05-1.05% ) as a weight % to Ni on the one side of a copper foil, and a layer processed with a chromate on the one side or both sides of the Ni-Mn-Mo gilt layer.
Patent KR-20000038910-A (KR)
Title: Recycling method of deleted parts in program production
Inventor: KIM HO KWANG
IPC: G06F9/44
Filed: 1998-12-10
Abstract: PURPOSE: A recycling method of deleted parts is proposed to enhance convenience in program production and to reduce the production time by storing all part deleted by a deletion key in the process of program production in separate directories, and by enabling users to conveniently use deleted parts again if users want the parts. CONSTITUTION: A recycling method of deleted parts is consisted of four steps. A first step is to determine whether a deletion key is pressed or not during coding a program. A second step is to store deleted data with job unit and information data, such as deleted position, deleted date and time, and the name of a program currently produced, in new temporary directories if a deletion key is pressed. A third step is to determine whether an undo key about specific deleted parts is pressed or not during the production of program. A fourth step is to place a deleted part required by the user at a position wanted by the user if an undo key is pressed. When an undo key is pressed, a list about deleted parts is displayed on a monitor and users can select a deleted part after directly confirming the deleted parts on a window.
Patent KR-20000039496-A (KR)
Title: Polymer culture dish surface modified utilizing ion-beam and surface modifying method
Inventor: KO SEOK KEUN
IPC: C08J7/00
Filed: 1998-12-14
Abstract: PURPOSE: A polymer culture dish having an improved hydrophilic property and surface adhesiveness is provided which a part of carbon of the activated surface is reacted with a reactive gas after activating the surface by irradiating less than 2,000 eV of ion-beam. CONSTITUTION: A surface modifying apparatus comprises a gas inlet part(20) introducing a reactive gas into a vacuum chamber(10), an ion source(30) producing ion beam, a substrate holder(40) and a vacuum pump(50). The polymer culture dish is built in the substrate holder(40) and the reactive gas is introduced into the vacuum chamber(10) through the gas inlet part(20). Ion-beam having less than 2,000 eV is irradiated to activate the surface of the polymer culture dish from the ion source(30). The surface of the polymer culture is reacted with the reactive gas such as oxygen, nitrogen, carbon dioxide, carbon monoxide, ozone and their mixed gas to produce a hydrophilic group on the surface.
Patent KR-20000040456-A (KR)
Title: Method for formatting optical recording medium
Inventor: KIM EUNG SU
IPC: G11B20/12
Filed: 1998-12-18
Abstract: PURPOSE: A method for formatting an optical recording medium is provided to replace a PDL(primary defect list) for an SDL(secondary defect list) entry requiring a long time for linear replacement while formatting. CONSTITUTION: An overflow while moving defect information registered in an SDL to a PDL is calculated. After deciding the overflow, the times for the linear replacements of each defect block which is registered in the SDL, are calculated. Then, the SDL entries are arranged according to the lengths of the times. And the information about the defect blocks registered in the SDL is moved to the PDL. If the overflow is not decided, the entire defect information registered in the SDL is moved to the PDL.
Patent KR-19990063410-A (KR)
Title: 니켈초미분
IPC: H01G4/008
Filed: 1998-12-24
Abstract: 평균입자지름이 0.2∼0.6μm를 가지는 것과 수-크기분포에서 0.1% 미만의 함유양으로서 입자지름이 평균입자지름보다 2.5배 이상의 큰 입자를 포함하는 것을 특징으로 하는 니켈초미분.  그것은 기상에서 수소환원에 의해 염화니켈증기로부터 제조된다. 그것은 내부전극 사이에 극소의 단락을 갖는 박막 내부전극(고 용량에 기여하는)에 제공된다.
Patent KR-20000045585-A (KR)
Title: Method for producing buffer wheel
Inventor: KANG SHIN WHA
IPC: A47C21/04
Filed: 1998-12-30
Abstract: PURPOSE: A producing method of a buffer wheel is provided to minimize noise, wear ratio and vibration when a wheel operates by eliminating displacement of a buffering agent from a housing due to long use. CONSTITUTION: High frequency is fed to an inner wheel(1) of an intruded buffer wheel thus an adhesive agent coated on the interface of the inner wheel and an outer wheel(10) is instantaneously fused by an inductive heating. The adhesive force of the inner wheel and the outer wheel is maximized. Heating is performed by heating for from 2 to 3 seconds while the temperature rises instantaneously from 180 to 200°C by feeding high frequency to the inner wheel formed of metal by a high frequency inducing heater.
Patent KR-19990035758-A (KR)
Title: 모듈형 댐퍼 및 이 댐퍼를 구비한 구조물
IPC: F16F15/08
Filed: 1996-06-11
Abstract: 본 발명에 따라서 댐퍼 구조물에 장착되는 하나 또는 그 이상의 개개의 댐퍼 요소들이 제공된다.  댐퍼들은 빌딩, 다리 등과 같은 구조물을 감쇠시키는데 유용하다.
Patent KR-19990036271-A (KR)
Title: 콜라겐 과다생산과 연관된 질환의 치료에 이용되는 ｃ-프로테나제 저해물질
IPC: A61P1/16
Filed: 1996-08-08
Abstract: 본원 발명은 비정상적인 콜라겐 형성을 조절, 변형 및 저해을 하기위해 C-프로테나제 활성을 저해할 수 있는 유기 분자의 새로운 용도에 관계한다.
Patent KR-19990063924-A (KR)
Title: 헤테로고리-치환 살리실산 유도체
IPC: C07D405/12
Filed: 1996-09-26
Abstract: 화학식 (I)의 살리실산 유도체 및 그의 제조 방법, 제초제 조성물, 및 바람직하지 않은 식물의 억제 방법이 제공된다. 
     <화학식 I> 
     
       
     
     상기 식에서, 
     A는 1 개의 산소, 질소 또는 황 원자 또는 1 내지 4 개의 질소 원자 또는 1 내지 2 개의 질소 원자와 추가로 1 개의 황 또는 산소 원자를 갖는  5-원 헤테로방향족 고리로서, 이 고리에는 1 개 이상의 라디칼 -B-R 5 이 부착되고, 니트로, 할로겐, 시아노, 비치환되거나 치환된 알킬, 알킬티오, 알킬술포닐, 알킬술피닐, 포르밀 또는 라디칼 R 5 치환체 중 1 개 이상이 추가로 부착될 수 있거나; 2 내지 3 개의 질소 원자를 갖는 6-원 헤테로방향족 고리로서, 이 고리에는 1 개 이상의 라디칼 -B-R 5 이 부착되고, 니트로, 할로겐, 시아노, 비치환되거나 치환된 알킬, 알킬티오, 알킬술포닐, 알킬술피닐, 포르밀 또는 라디칼 R 5 치환체 중 1 개 이상이 추가로 부착될 수 있고, 
     B는 산소, 황, SO, SO 2 이고, 
     X는 산소 또는 황이고, 
     Y는 질소 또는 C-H이고, 
     Z는 질소 또는 C-R 4 기이고, 
     치환체 R 1 , R 2 및 R 3 는 제1항에서 정의한 바와 같다.
Patent KR-20000005139-A (KR)
Title: Processes for the oxidation of alkanes
Inventor: MAHER JOHN MICHAEL
IPC: C07C57/04
Filed: 1997-03-27
Abstract: PURPOSE: In oxidation of alkane into aldehyde the process needs to be improved for mass production. For example, propane which you can get easily and less expensive than propylene can be used as starting material and this process needs to be improved in the aspect of efficiency. CONSTITUTION: Oxidation of alkanes such as, for example, propane, to form unsaturated carboxylic aldehydes and acids such as, for example, acrolein and acrylic acid utilize oxygen and recycle alkanes, e.g., propane, to the aldehyde reactor. The presence of the alkene in the alkane-to-aldehyde reaction can enhance the efficiency of the processes.
Patent KR-20000005223-A (KR)
Title: Connector
Inventor: SILFVERBERG KIM
IPC: H01R/
Filed: 1997-03-24
Abstract: PURPOSE: A connector is provided to easily connect at least one stripped conductor end part. CONSTITUTION: The connector for connecting at least one stripped conductor end part (23) of a cable (20) includes a first body (1) having a through passing cable transit or channel (2), and a second body (10) that includes a recess (16) for receiving the first body and the cable end part (23), folded down onto the perimeter surface (5) of the first body (1). The first body (1) is radially deformable in relation to the second body (10), such as to elastically clamp the conductor end part (23) between the bodies (1, 10), wherein the effective perimeter of the body (1) and the conductor end part (23) is greater than the inner perimeter of the second body (10). The edge of the cupped second body (10) seals around the first body (1), and the channel wall of the first body is clamped into sealing abutment with the cable perimeter when the second body (10) is fitted onto the first body (1).
Patent KR-19990087837-A (KR)
Title: 개선된 텔레비젼 튜닝 시스템
IPC: H04N21/45
Filed: 1997-02-28
Abstract: 본 발명의 개선된 텔레비젼 컨트롤 시스템은 튜너(15), 메모리(13), 키보드(14) 및 컨트롤러(11)를 구비한다.  튜너(15)는 채널 선택 입력에 기초하여 복수-채널 텔레비젼 신호에서 하나의 채널을 선택한다.  복수-채널 텔레비젼 신호는 수신된 텔레비젼의 채널 세트용 신호들을 포함한다.  메모리(13)는 각 채널 식별기가 상기 튜너(15)에 의해 수신된 채널 세트의 서브 세트 중 하나에 대응하는 채널 식별기들의 리스트를 포함한 원하는 채널 리스트를 구비한다.  키보드(14)는 원하는 채널 버튼(16)과 원하는 프로그램 버튼(20), 숫자 키패드(30), 및 채널 업/다운 키(28)를 구비한다.
Patent KR-20000065177-A (KR)
Title: 인터넷 접근을 위한 url 수신이 있는 텔레비전.
IPC: G06F13/00
Filed: 1997-05-02
Abstract: 디스플레이 시스템(display system)은, 프레임 영역에서 연속적인 이미지 프레임 데이터(successive image frame data), 그리고 프레임 영역 사이의 데이터 영역에서 인터넷 URL(Internet Universal Resource Locator) 및 관련이 있는 데이터, 그리고 이미지 프레임 데이터에서 얻어내는 연속적인 디스플레이 모니터 프레임에서 디스플레이(display) 등을 가지는 데이터 스트림(data stream)(83)을 수신한다.  관련이 있는 데이터(association data)는 연속적인 프레임에서 하나 이상의 이미지 엔티티(image entity)를 하나 이상의 URLs 에 관련시키고, 디스플레이에서 관련이 있는 이미지 엔티티를 선택함으로써(99), 시청자에 의하여, 시스템은 인터넷(Internet)에 접근하는 것이 가능하고(103), 시스템은 URL 과 관련이 있는 인터넷(Internet)에서의 원(源)(source)에 연결되고, 원(源)에서 웹 페이지를 다운로드(download)하고(109), 디스플레이에서 웹 페이지를 디스플레이한다(111).  그 이상의 관련이 있는 정보에 접근하도록, 시청자는 디스플레이된 웹 페이지와 상호 작용할 수 있다.  숨겨져 있는 URL 과의 관련을 표시하도록, 엔티티는 디스플레이에서 강조될 수 있다.
Patent KR-20000022133-A (KR)
Title: Binders for cores and molds
Inventor: JOHNSON CALVIN K
IPC: C04B24/00
Filed: 1997-05-23
Abstract: PURPOSE: Binders for cores and molds have improved mechanical shake out and improved water collapsibility relative to an all silicate binder system. Also, relative to conventional all phosphate binder system, the binders have superior hot strength, i.e., the foundry cores and molds do not soften at elevated temperatures. CONSTITUTION: In no-bake inorganic binder compositions for binding particulate material and methods for curing such inorganic binders, in which the inorganic binder compositions are composed of silicate and phosphate components. The no-bake compositions further contain curing catalyst such as a catalyst selected from the group consisting of aliphatic carbonates, cyclic alkylene carbonates, aliphatic carboxyl acid esters, cyclic carboxyl acid esters, phosphate esters and mixtures thereof. The composition produces a binder having the advantageous strength properties of a silicate binder system with the water breakdown properties of a phosphate binder system.
Patent KR-20000050741-A (KR)
Inventor: JIN SEUNG EON
IPC: G11C5/14
Filed: 1999-01-14
Abstract: PURPOSE: A circuit for generating a back-bias voltage in a semiconductor memory is provided to perform a pumping suitably with respect to an interval where a substrate voltage variation is big and an interval where a substrate voltage variation is small by varying an amplitude of an oscillation pulse applied to a MOS capacitor of a charge pump. CONSTITUTION: A ring oscillator(10) generates an oscillation pulse(OSC). A driving unit(11) buffers the oscillation pulse(OSC) and outputs a buffered pulse(OSCDRV). A transfer gate(13) transmits the pulse outputted from the driving unit(11) as it is or reduces an amplitude of the pulse and outputs it. A charge pump(12) pumps the pulse of which pulse has been adjusted by the transfer gate(13), generates a required substrate voltage, and outputs it.
Patent KR-20000050833-A (KR)
Inventor: LEE PAL JIN
IPC: D06F33/02
Filed: 1999-01-15
Abstract: PURPOSE: A method for sensing the volume of laundry of a washing machine is provided which is improved sensing rate of the volume of laundry and can establish elaborately the water level to establish the optimum washing pattern and the washing time by sensing the volume of laundry with changing point of variation of the water level being varied proportionately with the volume of laundry when water supply starts. CONSTITUTION: A method for sensing the volume of laundry of a washing machine comprises the steps of: measuring the variation of the water level in accordance with variety of the time at the same time insert clothes into the washing machine, followed by starting a water supply; calculating the measured variation of the water level as the unit of the fixed time to calculate the variation of the water level in accordance with variety of each time; operating the calculated variation of the water level in accordance with variety of each time, deciding whether the water supply finish or not and measuring the water supply of the present with a value of the calculated variation and a fixed content of change of the variation; setting up the washing pattern and the washing time corresponding to the measured water level of the present to carry out and to end washing
Patent KR-20000028545-A (KR)
Inventor: LEE CHI HOON
IPC: H01L29/49
Filed: 1999-01-23
Abstract: PURPOSE: A semiconductor device and a manufacturing method thereof are to prevent a void from being generated in a polysilicon layer when a subsequent heat treatment is processed after the patterning of a multi layered gate electrode. CONSTITUTION: A semiconductor device is divided into an active region and a passivation region by a field oxide film(102). A gate(A) formed on the active includes a polysilicon layer(106) deposited on an upper surface of a gate insulated layer(104), and an insulated layer(110) deposited on an upper surface of the polysilicon layer(106). A gate(B) formed on the passivation region includes a polysilicon layer deposited on an upper surface of a gate insulated layer(104), a metal silicide layer(108) deposited on an upper surface of the polysilicon layer, and an insulated layer deposited on an upper surface of the metal silicide layer. The gate is formed by the polysilicon layer only to essentially eliminate the generation of a void in the polysilicon layer of the active region.
Patent KR-20000034794-A (KR)
Inventor: TAGOZI HITO
IPC: B60C11/00
Filed: 1999-02-02
Abstract: PURPOSE: The polishing paint composition for a tire is provided, which is not sticky, imparts good gloss to a tire, forms the coated layer with excellent durability, adhesive strength and water-proof, protects a tire for a long time, and prevents cracking. CONSTITUTION: The polishing paint composition for a tire comprises 5-40 wt% of a coated layer component consisting of acrylic acid ester polymer and/or methacrylic acid ester polymer whose glass transition temperature is 0-50°C; 10-40 wt% of a plasticizer based on the weight of the coated layer component; 0-10 wt% of an age resister based on the weight of the coated layer component; and 0-10 wt% of carbon black based on the weight of the coated layer component.
Patent KR-20000059789-A (KR)
Inventor: WOO JONG SU
IPC: A61K31/495
Filed: 1999-03-09
Abstract: PURPOSE: An antifungal pharmaceutical composition for external application is provided which has an excellent skin permeability and also, a producing method thereof is provided. CONSTITUTION: The antifungal pharmaceutical composition for external application contains emulsion concentrate comprising 0.1 to 10 wt.% of antifungal agent, 0.1 to 30 wt.% of biphilic solvent having 100 deg. C or higher boiling point, 1 to 40 wt.% of surfactant and 1 to 40 wt.% of oil; hydrogel comprising 0.1 to 10 wt.% of gelation agent and 0.1 to 90 wt.% of purified water; and 0.01 to 5 wt.% of alkalifying agent, in which antifungal agent is butenafine-HCl, naftifine-HCl, terbinafine-HCl, and biphilic solvent is diethyleneglycol monoethylether, dimethylisosorbid, N-methyl-2-pyrrolidine, 1,2-propyleneglycol or propylenecarbonate. The method for producing antifungal pharmaceutical composition comprises the steps of: preparing emulsion pre-concentrate by mixing antifungal agent, biphilic solvent, surfactant, and oil; producing hydrogel by adding gelation agent into purified water; and mixing emulsion pre-concentrate and hydrogel and adding alkalifying agent to adjust pH.
Patent KR-20000059851-A (KR)
Inventor: JUN JU HO
IPC: B66B1/00
Filed: 1999-03-09
Abstract: PURPOSE: A circuit for preventing mischievous call on an elevator is provided to prevent unmanned running of the elevator by automatically cancelling the call when there is no passenger inside the elevator and to prevent the stop of the elevator at a called floor when there is no passenger after a call button is pressed. CONSTITUTION: A circuit for preventing mischievous call on an elevator includes a sensor(5) having an output terminal connected to an input terminal of a flip-flap(3) through an inverter(2), a selection button(10) or a call button connected to the other input terminal of the flip-flap, an AND gate(4) having an input terminal connected to the output terminal of the sensor, which does not pass through inverter and the output terminal of the flip-flap, and an elevator main controller(6) connected to an output terminal of the AND gate.
Patent KR-19990078106-A (KR)
Title: 결정성장장치
IPC: C30B15/02
Filed: 1999-03-22
Abstract: 본 발명에 따른 결정괴(結晶塊)의 제조를 위한 결정성장장치에는 하나의 재충전관(7)이 설치되어 있으며, 그 재충전관(7)을 통하여 입상물질(17)이 하나의 결정성장 용기(1) 내부에 장치되어 용탕(鎔湯)이 들어있는 도가니(2) 속으로 도달하도록 되어 있다. 상기 용기(1)의 외부에 노출되어 있는 재충전관(7) 내에는 하나의 세분분리기(8)가 장치되어 일종의 공기체(pneumatic sieve)와 같은 작용을 하면서, 보호가스 쿠션(cushion)에 의하여 상기 입상물질(17) 속에 혼합되어 있는 세분(細粉)이 제거된다. 그렇게 함으로써, 재충전물질의 점착(粘着)으로 인하여 재충전관(7)의 폐색(閉塞) 위험을 방지할 수 있다.
Patent KR-20000061621-A (KR)
Inventor: JUNG SEONG IK
IPC: G11C11/417
Filed: 1999-03-29
Abstract: PURPOSE: A SRAM cell power source applying circuit is provided which supplies a voltage, which has a different voltage level from an external power source voltage level, applied to a cell using an internal circuit. CONSTITUTION: A SRAM cell power source applying circuit comprises: a first PMOS transistor(PM1) whose source is connected to a pad connected to an external power source and a drain is connected to a first node connected to a memory cell; a first and a second resistor(R1,R2) connected in serial between the first node and a ground voltage; a third resistor(R3) connected in serial to the pad connected to the external power source; an NMOS transistor(NM1) whose drain is connected to a second node connected with the third resistor and a source is connected to the ground voltage and a gate is connected to a third node between the first resistor and the second resistor; a second PMOS transistor(PM2) whose source is connected to the external power source and a drain is connected to a fourth node connected with the gate of the PMOS transistor and a gate is connected to the second node; and a fourth resistor(R4) connected in serial between the fourth node and the ground voltage. The circuit can reduce the standby current and also satisfies data retention voltage, by maintaining the power source voltage constantly applied to the SRAM memory cell using an internal circuit.
Patent KR-19990068317-A (KR)
Title: 변곡이득특성을가지는저잡음증폭기
Filed: 1999-03-30
Abstract: 본 발명은 변곡이득 특성을 가지는 저잡음 증폭기에 관한 것으로서, 수신 입력된 고주파신호를 증폭하는 제 1증폭기(10); 상기 제 1증폭기(10)로부터 출력된 증폭 신호를 입력하여 필요한 부분( 즉, 수신신호의 대역 )만을 대역통과 여파한 후 출력하는 대역 여파기(11); 상기 대역여파된 신호를 감쇠제어기(20)로부터 제공되는 감쇠신호에 따라 일정레벨 이하가 되도록 감쇠한후 출력하는 선형 감쇠기(12); 상기 선형 감쇠기(12)의 출력신호를 증폭하여 송신단측으로 출력하는 제 2 증폭기(13); 및 상기 제 2 증폭기(13)의 출력신호에서 기설정된 한계레벨 이상의 신호를 검출하고 그 검출된 한계레벨 이상의 신호에 의거하여 상기 감쇠신호를 생성하는 감쇠제어기(20)를 포함하여 구성되어, 입력신호에 비례하여 증폭된 출력신호를 갖되, 상기 출력신호가 기 설정된 일정레벨 이하로 제어 출력되도록 함으로써, 통신 중계장치 등에 적용할 시 타 통화채널의 방해 현상 및 통화채널의 통화불능 상태를 방지하는 효과가 있다.
Patent KR-20000066608-A (KR)
Title: Alignment mark of semiconductor device
Inventor: KIM SEON GEUN
IPC: H01L21/027
Filed: 1999-04-19
Abstract: PURPOSE: An alignment mark of a semiconductor device is provided to improve an alignment precision, by eliminating asymmetry generated after evaporating a metal layer in a field image alignment(FIA) mark. CONSTITUTION: An alignment mark comprises a scribe line(110), an insulating layer pattern(120) and an alignment mark region. The scribe line divides dies on which cell patterns are formed. The insulating layer pattern is disposed at regular intervals, having a constant width on the scribe line. The alignment mark region is a space between the insulating layer patterns, having a width narrower than that of the insulating layer pattern.
Patent KR-20000066880-A (KR)
Inventor: BANG JEONG HUN
IPC: B41J27/08
Filed: 1999-04-21
Abstract: PURPOSE: An apparatus for eliminating a photosensitive belt is provided to eliminate the photosensitive belt from a belt unit in a predetermined period. CONSTITUTION: An apparatus for eliminating a photosensitive belt including a case(110) having an opening plane(111) which the photosensitive belt comes in and out, a belt unit(120) installed in the case for supporting the photosensitive belt, a tension and steering adjusting unit for adjusting the tension and the steering of the photosensitive belt, wherein the apparatus for eliminating the photosensitive belt includes a front frame(113) installed in the case for being moved between a first location closing the opening plane and a second location opening the opening plane, a clamping unit installed in the front frame and having a pair of rotating members(220,230) coupled with each other for clamping the photosensitive belt when renewing the photosensitive belt, a sensor for detecting whether the photosensitive belt is moved by the tension and steering adjusting unit and interposed between rotating members located in the first location, and an adjusting unit for maintaining the clamping unit at the state of being dissolved at the first and the second locations and maintaining the clamping unit at the state of clamping state during the period when the clamping unit moves from the first location to the second location, wherein the clamping unit clamps the photosensitive belt after being interposed between the rotating members for eliminating the photosensitive belt from the belt unit.