baber/WOPTO huggingface dataset:
Patent KR-19990014518-A (KR)
Title: 유리 대리석의 제조방법
IPC: C03C3/087
Filed: 1998-11-18
Abstract: 본 발명은 제품의 표면에 불규칙적인 용융상태의 자연스런 무늬가 무작위로 형성되어 자연 대리석에 근접한 미감을 형성하는 유리 대리석 제조방법에 대하여 개시한다. 이는 각종 폐유리부재를 무작위의 크기로 파쇄시키는 파쇄단계와; 파쇄된 폐유리조각을 세척하는 단계와; 세척된 유리조각들을 형틀에 적층수용시키는 단계와; 형틀을 소성로에서 소정온도로 소정시간동안 가열시키는 가열단계와; 가열된 폐유리조각을 서냉로에서 서냉시키는 서냉단계;를 포함한다. 가열단계는 형틀을 소성로가 개폐가능한 통풍구가 마련된 전기로에 넣고, 통풍구를 개방시킨 상태에서 700℃내지 900℃로 1차 가열시키는 단계와; 통풍구를 닫은후 전기로내의 온도를 900℃ 내지 1100℃ 에서 유지시키는 2차가열단계로 이루어진다. 또한 1200℃까지 올려서 완전히 유리를 용융시키는 제3단계를 포함한다. 이러한 제조방법은 투명한 유리조각들을 고온으로 가열하여 서로 융착되게 함과 동시에 최소량의 실투현상이 유리조각들 사이에 나타나게 하거나 또는 유리가 용융되어 흐르게 함으로써 소정의 두께를 갖는 유리판재로 성형되고 표면은 고열에 의해서 유리조각을 압축한 것처럼 무늬가 표현되거나 또는 완전히 용융되어 흐르는 상태의 무늬가 표현되는 유리대리석을 이루게 한다. 이 경우 고온에서 유리조각이 융착되므로 상호 결합강도가 증진되고 더욱 자연에 가까운 대리석이 만들어지며 제조공정이 대폭 단축된다.
Patent KR-19990062603-A (KR)
IPC: G03F7/027
Filed: 1998-11-25
Abstract: A negative-acting photoimageable composition useful as a photoresist comprises an acid-functional binder, a photopolymerizable component, a photoinitiator chemical system comprising 9-phenyl acridine or a homologue thereof, and a dibenzoate plasticizer.
Patent KR-20000034260-A (KR)
Title: Apparatus for processing multi modes of pdp television
Inventor: LEE SUNG DAE
IPC: H04N5/66
Filed: 1998-11-28
Abstract: PURPOSE: An apparatus for processing multi modes of PDP(Plasma Display Panel) television is provided to reconfigure the image data into n sub fields or to n-m sub fields to control the brightness of screen. CONSTITUTION: An apparatus for processing multi modes of PDP(Plasma Display Panel) television includes a group of data conversion tables(202a,202b), a group of sustain tables(204), selector(206), a table determination signal generator, a first switch(210) and a second switch(212). The group of data conversion tables(202a,202b) include a first data conversion table for reconfiguration of n sub fields and a second data conversion table for reconfiguration of n-m sub fields. The group of sustain tables(204) includes first and second sustain interval conversion table with the interval set to correspond to the first and second data conversion tables. The selector(206) generates a select signal for processing the input image according to a user. The table determination signal generator generates a table determination signal. The first switch(210) generates a sub field conversion signal, and the second switch(212) generates a sustain interval determination signal as a scan/sustain actuator.
Patent KR-20000034661-A (KR)
Title: Structure of cylinder block and crank shaft bearing with oil passage for vehicle
Inventor: CHOI YEONG HWA
IPC: F16C9/02
Filed: 1998-11-30
Abstract: PURPOSE: A structure of a cylinder block and a crank shaft bearing with an oil passage for a vehicle is provided to reduce friction heat of a crank shaft and a bearing and to make the circulation of oil prompt. CONSTITUTION: An oil delivered via a though hole(36a) of an upper bearing (26) is returned to an oil fan via two return holes(38) formed on a main bearing cap(12) fixed to the bottom of a cylinder block. A gap able to form an oil film is formed by a slit formed on the bottom of the cylinder block. The oil delivered to a lower bearing (28) is returned via the return holes promptly after lubricating a crank pin part. Thereby the friction heat of the inner faces of upper and lower bearing s(26,28) and the crank pin part is cooled promptly.
Patent KR-20000041461-A (KR)
Title: Fabrication method of improved image sensor
Inventor: LEE JU IL
IPC: H01L31/0232
Filed: 1998-12-22
Abstract: PURPOSE: A fabricating method of an image sensor is provided to improve light transmittance and light sensitivity. CONSTITUTION: In a fabrication of an image sensor, a field insulating layer(2) and unit pixels(3) are formed on a silicon substrate(1). Next, an interlayer dielectric(4) and metal wiring(5) are formed thereon. Then, an oxide layer(6) and a nitride layer(7) are successively formed to protect devices from moisture or scratch. Next, a photoresist layer(10) is coated and selectively removed to open a pad. Then, a color filter array(8) is formed on the planarized photoresist layer(10). Next, a second photoresist layer(12) is coated and selectively removed. The oxide and nitride layers(6,7) exposed through the photoresist layers(10,12) are then etched, so that the pad to be wire-bonded is opened. At this time, residuum of the color filter on the exposed oxide and nitride layer(6,7) is simultaneously removed. Next, micro lenses(9) are formed above the color filter array(8). Since the photoresist layers(10,12) are planarized, the micro lenses(9) have a uniform shape per the unit pixels(3).
Patent KR-20000041864-A (KR)
Title: Character input method of display device
Inventor: KIM JAE RYONG
IPC: H04N21/475
Filed: 1998-12-23
Abstract: PURPOSE: A character input method of a display device is provided to more rapidly select and input desired characters with users' inputs reduced by selecting desired characters through the rotations of a character-arranged pad. CONSTITUTION: A method comprises the steps of: displaying a character- arranged pad on a screen, having arranged characters about one point and selecting desired characters while changing a character to which an indicator of the displayed character-arranged pad points by an input unit, wherein the character-arranged pad in the display step has characters arranged around one center point, a structure of an entire character arrangement is in a circular form, to thereby more rapidly select and input desired characters.
Patent KR-20000042481-A (KR)
Title: Method for fabricating capacitor of semiconductor device
Inventor: HONG KWON
IPC: H01L27/10
Filed: 1998-12-24
Abstract: PURPOSE: A method for fabricating a capacitor of a semiconductor device is provided to achieve high speed and high density of the device and to improve property and reliability of the device thereby. CONSTITUTION: A method for fabricating a capacitor of a semiconductor device comprises forming an interlayer insulating layer(13) with contact holes, filling the contact holes with tungsten to form contact plugs(15) which have recessed grooves, forming a tungsten silicide layer(17) and a tungsten nitride layer(19) to fill the grooves, polishing the layers(17, 19), forming a tungsten silicide nitride layer by rapid thermal nitrification of the tungsten silicide layer(17), forming a layer(23) for a lower electrode, etching the layer(23) for the lower electrode and the tungsten silicide nitride layer, forming a high dielectric layer(25) and a layer(27) for an upper electrode, and etching the high dielectric layer(25) and the layer(27) for the upper electrode.
Patent KR-20000043354-A (KR)
Title: Synchronizer of manual transmission for vehicle
Inventor: CHA BYUNG HEE
IPC: B60K17/06
Filed: 1998-12-24
Abstract: PURPOSE: A synchronizer of a manual transmission for a vehicle is provided to reduce a cost and to increase an operating property by composing a synchronizer key as an elastic member to reduce a number of members. CONSTITUTION: An elastic plate(P) press-cut as a long strip shape is bent in a box body-shape. Free ends(P1,P2) are used as a supporting point of an elastic rebound by leaving as it is. A rubbing face and a guiding face at a contacting are formed by bending a contacted sidewall(42) bent side the box body and by bending in each corner. A synchronizer key(20) is formed a protrusion(41) upward a center and is stick in an inside spline groove of a sleeve as the self elasticity. The early rubbing of the synchronizer key is induced and an index operation is performed at the same time by moving with the sleeve at a shifting. Thereby a damage such as a scratch or a mark with a key groove portion of a synchronizer ring is prevented by the sidewall(42) formed in both sides at the index operation.
Patent KR-20000043381-A (KR)
Title: Method for controlling draining in centrifugal washing machine
Inventor: KIM JI MAENG
IPC: D06F33/02
Filed: 1998-12-29
Abstract: PURPOSE: A method for controlling the draining in a centrifugal washing machine is provided, to reduce the total operation time of a washing machine and to prevent the generation of vibration and noise due to the unbalance of washing bucket during dehydration due to the massed laundry. CONSTITUTION: When the rinsing process after washing process starts, the draining motor is operated to open the drain pathway and the water contained in the washing machine is drained away through the drain pathway, the operation motor is operated at the same time to carry out the intermittence dehydration (S101) for the set time (S102) and the main dehydration (S103) for the set time in sequence, and water is supplied (S104).
Patent KR-20000044956-A (KR)
Title: Method for fabricating gate electrode of transistor
Inventor: LEE GI YEOB
IPC: H01L29/49
Filed: 1998-12-30
Abstract: PURPOSE: A method for fabricating a gate electrode of a transistor is provided to suppress a shift phenomenon of a threshold voltage owing to a nitrogen segregation by lowering an electric negative degree of a plasma at a gate etching. CONSTITUTION: A method for fabricating a gate electrode of a transistor comprises forming a gate oxide film(12), a conductive layer(13) for a gate electrode and an anti-reflective coating(14) on a semiconductor substrate(11). A first nitrogen distribution region is formed at an upper portion of the conductive layer(13) by using an ion implantation process. An annealing is performed so that a second nitrogen distribution region(15B) is formed around the gate oxide film(12). The gate oxide film(12), the nitrogen distribution region(15B), the conductive layer(13) and the anti-reflective coating(14) are patterned so as to form a gate electrode(130), and a rinsing process is performed by using a de-ionized water.
Patent KR-20000046812-A (KR)
Title: Method of manufacturing semiconductor device
Inventor: SEONG YANG SU
IPC: H01L21/82
Filed: 1998-12-31
Abstract: PURPOSE: A method of manufacturing semiconductor device is to prevent a void from being produced in a spaced region of gates. CONSTITUTION: A substrate with an isolating region(2) and a p-typed well(3) formed is deposited with a gate oxide film(4), a polysilicon(5), WSix film(6), a cap oxide film(7) and a cap nitride film(8), in turns. After the isolating region and p-typed well are etched to form spaced first to fourth gates, a heat oxide film(9) is formed on the exposed gate oxide film, and a n-typed region of a low density is formed in the p-typed well by using the first to fourth gates as a mask. A nitride film(10) is deposited on the whole surface of the substrate, and a high temperature and low pressure oxide film(11) is deposited on the nitride film. At that time, since the spaced region of the first to fourth gate is significantly large, a void is formed along a longitudinal direction of the gate. The oxide film and nitride film are etched to form a contact hole in the spaced region.
Patent KR-20000046995-A (KR)
Title: Method for transmitting receiving processing program of machine tool
Inventor: NAM DA HO
IPC: B23Q15/00
Filed: 1998-12-31
Abstract: PURPOSE: A method is provided so a user of machine as to conveniently process by downing a program of a host computer from a machine without a control of the host computer. CONSTITUTION: A machine demands a corresponding processing program to a host computer. The host computer uploads the processing program to the machine. When the host computer is waited in a turned-on state of a power, the host computer uploads the processing program requested from the machine to the machine. Therefore, an operator is not needed to a separated control of the host computer. A data of a processing process is downloaded to the host computer during proceeding a processing by the downloaded processing program. The operator processes by waiting an operation of the machine in an initial state with resetting during stopping a communication by transmitting to the host computer(10) when an error is generated. Thereby a damage of machine by the error according to the control of the machine and a deciding error of the host computer are prevented previously.
Patent KR-19990044622-A (KR)
Title: 부서지기 쉬운 무연 총탄 및 총탄 제조 공정
IPC: F42B12/74
Filed: 1997-04-25
Abstract: 본 발명은 증가된 파열성(쉽게 파편화될 수 있는)을 가진 총탄, 이러한 총탄 제조방법 및 재료에 관계한다.  본 발명의 총탄은 필요한 수준의 파열성을 갖는 총탄을 획득하기 위해서 압축 및 소결되는 구리 또는 구리합금 분말(청동, 황동 및 분산물보강구리를 포함하여)로부터 제조된다.  본 발명의 실시예에서 파열성을 증가 또는 감소시키는 여러 첨가제를 총탄이 포함한다.
Patent KR-19990071570-A (KR)
Title: 폐기물의 처리 방법
IPC: C04B35/486
Filed: 1996-11-27
Abstract: 용액 상태의 지르코늄계 금속의 처리를 위한 방법이 기재되어 있고, 상기 방법은 상기 금속 용액을 상기 지르코늄계 금속 산화물으로 전환하는 단계; 펠렛화(pelletising), 압출 또는 주조에 의해 상기 산화물의 그린 바디를 형성하는 단계 및 상기 산화물을 소결하여 고체 물품으로 만드는 단계를 포함한다.
Patent KR-19990087166-A (KR)
Title: 샤워욕장치 및 분무노즐
IPC: A47K3/28
Filed: 1997-02-25
Abstract: 본 발명은, 릴랙스한 상태에서 더운물을 뒤집어 쓸 수 있고, 욕조입욕과 동등한 신체의 따뜻한 감을 얻을 수 있는 샤워욕장치를 제공한다.   즉, 샤워욕장치본체와, 입욕자가 착석하는 착석수단과, 입욕자에 온수를 분출하는 분무노즐과, 적어도 1개의 분무노즐을 설치한 암을 설치해서 구성한 것으로서, 사용자는 앉은 상태에서, 분무가 몸체전체를 둘러싸고 따뜻한 감을 얻을 수 있다.
Patent KR-20000050576-A (KR)
Inventor: HAN SANG MYEONG
IPC: A23L7/10
Filed: 1999-01-12
Abstract: PURPOSE: A preparation method of a rice-cake in form of rounded stick capable of being preserved for a long time at ambient temperature is provided, which is characterized in that the rice cake is pretreated with an organic acid to adjust pH before vacuum packing. Therefore, the rice cake prepared by the system is preservable for a long time, without hardening of texture during distribution. CONSTITUTION: A preparing system of a rice cake capable of being preserved for a long time at ambient temperature comprises the following components : (i) a mixer which makes a dough by mixing rice powder, flour and other grain powder with water ; (ii) a combining device which forms the dough into two dough sheets, after then, forms one dough sheet by folding ; (iii) a roller which regulates the thickness of dough sheet by a multistage roller ; (iv) an extruding device which extrudes the dough sheet having a fixed thickness in the form of the sliced rice cake ; (v) a cutter which cuts the sliced rice cake in a fixed length; (vi) a boiler which boils the sliced rice cake at a fixed temperature ; (vii) a washer & cooler which washes and cools the sliced rice cake simultaneously ; (viii) an immersing device which immerses the sliced rice cake in an organic solution for a fixed time ; (ix) a packing device which packages the immersed sliced rice cake ; and then (x) a sterilizer which sterilizes the seal-packed sliced rice cake by heating.
Patent KR-20000055235-A (KR)
Title: Method for detecting touch of welding tip
Inventor: SHIN YOUNG JU
IPC: G05D3/00
Filed: 1999-02-04
Abstract: PURPOSE: A method for detecting a touch of a welding tip is provided, which judges if the welding tip touches a target using a variation in the location of the welding tip with the help of only a location sensor, to reduce the cost required for the detection. CONSTITUTION: While a welding tip moves from a search location toward a target at a uniform speed, it is detected if the welding tip reaches a touch checking position(S2). Upon the welding tip arriving at the touch checking location, a traveling distance of the welding tip is periodically calculated using a location sensor and then compared with a predetermined minimum value(S3,S4). The welding tip is judged to touch the target when the traveling distance of the welding tip, corresponding to a single period, is smaller than the minimum value(S5).
Patent KR-20000055842-A (KR)
Inventor: LEE SANG HEE
IPC: F01N5/02
Filed: 1999-02-10
Abstract: PURPOSE: An apparatus for heating container box of dump truck utilizing exhaust heat from engine is provided to protect aggregate loaded in the container box from being frozen while supplying exhaust gas from an engine to a heating pipe installed in the container box. CONSTITUTION: An apparatus comprises an induction pipe(20) branched from an exhaust pipe of an engine, a heating pipe(40) installed at an inner surface of a container box of a dump truck, and an exhaust gas intake valve(30) connecting the induction pipe(20) and the heating pipe(40). The exhaust gas flowed in by the induction pipe(20) is introduced into the valve(30) and flows through an interior of the pipe(40). Thus, the container box of the truck is heated by a temperature of the exhaust gas during operation of the truck, thereby preventing freeze of the aggregate in the container box.
Patent KR-19990072612-A (KR)
Title: 가수분해안정성이향상된난연성카보네이트중합체조성물
IPC: C08K3/22
Filed: 1999-02-12
Abstract: 본 발명은 열가소성 수지, 난연성 양의 유기인 화합물 및 안정화 양의 염기성 금속 산화물을 포함하는 난연성 열가소성 수지 조성물에 관한 것으로서, 이때 유기인 화합물은 적정가능한 산 함량이 유기인 화합물 1g당 수산화 칼륨 약 1.0㎎ 미만이며, 본 조성물은 향상된 가수분해 안정성을 제공한다.
Patent KR-20000056008-A (KR)
Inventor: KIM YOUNG WOOK
IPC: G08G3/00
Filed: 1999-02-12
Abstract: PURPOSE: A remote controlling and synchronous flickering device of sea-lane luminous marks using TRS(Trunked Radio System) is provided to control and maintain the action of the luminous marks which are set at regular internals by the sea-lane to distinguish the boundary line. CONSTITUTION: A remote controlling and synchronous flickering device includes a main device in a central control agency, and a sub device in each luminous mark. Because a control command of the parent device is transmitted to all sub devices at the same time through a TRS network, the action to turn on or put out the lights is controlled synchronously. And, the synchronous flickering state is maintained since the luminous marks are run at the same intervals after turned on. If certain luminous mark cannot maintain the synchronous flickering state for some reason, then the mark can flick asynchronously by the synchronous signal offered from the main device.
Patent KR-20000056151-A (KR)
Inventor: SIM SEUNG UK
IPC: H04M1/2749
Filed: 1999-02-13
Abstract: PURPOSE: A method for transmitting messages of a digital handy terminal is provided to selectively input a telephone number of a receiver by retrieving prestored telephone numbers, and to transmit a message made out with the selected telephone number. CONSTITUTION: A method for transmitting messages of a digital handy terminal having a function of a telephone directory, comprises the steps of: entering a message making out mode to make out a message; calling a function of retrieving the telephone directory in a mode for inputting a receiver telephone number; retrieving the receiver telephone number; if the retrieving process is completed, inputting the retrieved telephone number as the receiver telephone number; and transmitting the message by corresponding to the inputted telephone number.
Patent KR-20000047368-A (KR)
Inventor: LEE YOON BOK
IPC: G02F1/1368
Filed: 1999-02-19
Abstract: PURPOSE: A multi domain liquid crystal display device is provided to form a common auxiliary electrode so as to surround a pixel region on the layer same to that of a gate wiring. CONSTITUTION: A multi domain liquid crystal display device includes a first substrate(31), a second substrate, a liquid crystal layer, a plurality of gate wiring(1) and data wirings(3), a pixel electrode(13), a common auxiliary electrode(15), a gate dielectric layer, a preservation layer, a block layer, a color filter layer, a common electrode(17), and an alignment layer. The common auxiliary electrode(15) is formed so as to surround the pixel region(13) on the layer same to that of a gate wiring(3). The block layer is formed on the color filter layer.
Patent KR-20000056746-A (KR)
Inventor: BAE JAE YONG
IPC: D01F6/62
Filed: 1999-02-25
Abstract: PURPOSE: A method for preparing a polyester contracting mixed thread showing excellent drape property and repulsion elasticity and having dim luster is provided. CONSTITUTION: A method comprises steps of: (i) heat-treating high contracting modified partial stretched yarn which is prepared by adding isophthalic acid and bis-phenol A type to polyethylene terephthalate resin at a temperature range of 185-195°C and stretching simultaneously; and (ii) non-stretching and specific heat-treating midified polyester partial stretched yarn with high specific gravity under uniform tensile force in a stretching machine.
Patent KR-20000060128-A (KR)
Inventor: LEE JONG YEOL
IPC: G03G15/06
Filed: 1999-03-12
Abstract: PURPOSE: A method for controlling a printing voltage of an electronic image formation apparatus is provided for enhancing a printing quality by removing a ghost which occurs during a printing operation by correcting a printing voltage based on a frequency of ghost occurrence. CONSTITUTION: A printing voltage correcting value corresponding to a dot difference(delta D) is stored in a memory. When a system is started, a central processing unit determines a printing voltage in accordance with a resistance value of a printing roller and applies the determined printing voltage to the printing roller. When the user selects a ghost removing mode by operating an operation panel during the use of the electronic image formation apparatus, the central processing unit applies the printing voltage determined in S210 to the printing roller.
Patent KR-19990083262-A (KR)
IPC: H02H3/02
Filed: 1999-04-16
Abstract: 본 발명은 CB 동작 상태 변화와 릴레이 동작 상태 변화의 조회 처리를 용이하고, 신속 또한 정확하게 하는 것에 관한 것이다. 
     본 발명은 전력 계통(11)으로부터 입력된 상태량에 의거하여 복수의 CB(11a, 11b)를 동작시켜서 전력 계통(11)의 보호 제어를 하는 보호 제어 장치(2-1~ 2-n)와, 보호 제어 장치(2-1~ 2-n)와 전송계(통신 네트워크)(3)를 통해서 데이터 송수신 가능하게 상호 접속되고, 보호 제어 장치(2-1~ 2-n)로부터 송신된 데이터에 의거하여 전력 계통(11)의 감시 제어를 하는 계통 감시 장치(4)를 구비한 전력 계통 보호 제어 시스템(1)이고, 
     각 보호 제어 장치(2-1~ 2-n)는 복수의 CB(11a, 11b) 중의 적어도 1개가 동작하였을 때에, 보호 릴레이 회로(21), CB 제어 회로(22), 재폐로 회로(23) 및 CB 상태 도입 회로(24)로부터 보내진 정보에 의거하여, 동작한 CB(11a)와 그 동작 요인의 조회를 하는 조회 회로(30)와, 이 조회 회로(30)의 조회 처리에 의해 얻어진 결과를 전송계(3)를 통해서 계통 감시 장치(4)에 송신하는 조회 결과 송신 회로(31)를 구비하고, 계통 감시 장치(4)는 조회 결과 송신 수단(31)으로부터 전송계(3)를 통해서 송신되어 온 조회 결과를 수신하여 표시하는 조회 결과 수신부(35), 조합 메시지 파일 보존부(36) 및 CB 동작 표시부(37)를 구비하고 있다.
Patent KR-20000066750-A (KR)
Inventor: PARK JIN GYU
IPC: C07K19/00
Filed: 1999-04-20
Abstract: PURPOSE: A novel confusion partner, the carboxypeptidase Y(CPY) propeptide for effective representation of polypeptide in E.coli, a recombinant vector and its transformed body are provided, by which small polypeptides(that is degradable easily in E.coli) can be produced stably. CONSTITUTION: A process for the preparation of novel confusion partner, the carboxypeptidase Y(CPY) propeptide, a recombinant vector and its transformed body comprises of: separating genomic DNA of Saccharomyces serebisiae, and processing PCR(Polymerase Chain Reaction) using the separated genomic DNA as a model chain(the primer used in this stage is synthesized by a DNA synthesizer); separating the cut fraction from agarose gel after cutting the fraction(fraction 1: 287 bp) gained by PCR with a restriction enzyme Nde I and Xho I, inserting into pET22b+ vector, and transforming to E.coli BL21(DE3) to represent; and inoculating the transformed E.coli and not-transformed E.coli to LB(yeast extract 0.5%, trypton 1%, NaCl 1%) liquid medium containing ampicillin, and confirming representation by adding IPTG(Isopropyl-beta-D-thiogalactopyranoside) while culturing at 37°C. The CPY propeptide is existed in the form of non-soluble coagulated body, but is dissolved in urea easily.
Patent KR-20000073534-A (KR)
Inventor: LEE DONG SUNG
IPC: E05F3/22
Filed: 1999-05-11
Abstract: PURPOSE: A door stopper is provided to easily close a door after temporary fixing. CONSTITUTION: A smooth slant face of the opening of a fixed cam(4) contacts to a roller sleeve(1) during opening a door. The roller sleeve rolls and contacts with the fixed cam, thus the door is opened freely. With the removal of the external force applied on the door, a second bracket(H2) rotates counterclockwise by the repulsive force of a door closure. If the rotation is continuous, the fixed cam passes through the roller sleeve by roll-contact. Thereby, the door is closed automatically. If the door is released after stoppage during automatic closure, the roller sleeve contacts with the fixed cam linearly. According to the friction force, the automatic closure is stopped and fixed in an open state temporarily.