baber/WOPTO huggingface dataset:
Patent KR-20010061255-A (KR)
Inventor: LEE SANG UK
IPC: F25B39/00
Filed: 1999-12-28
Abstract: PURPOSE: A water sprayer for evaporative condenser is provided to achieve an improved heat exchange efficiency and overall efficiency of condenser by arranging water and air to meet in counter flow. CONSTITUTION: A water sprayer(30) comprises an inlet pipe(32) for ingress of water from an external source; and a plurality of water spray pipes(34) connected to the inlet pipe and which has a plurality of water spray holes(34a). Water spray pipes are arranged in parallel and to be spaced apart from each other so as to allow air to flow through the space between water spray pipes. A water distributor pipe(38) is installed between the inlet pipe and water spray pipes, so as to uniformly distribute the water introduced through the inlet pipe to each of water spray pipes. The water introduced through the inlet pipe flows left and right directions in the water distributor pipe, and is uniformly distributed to each of water spray pipes. The water is then sprayed through water spray holes, and flows along the surface of a heat exchanger positioned beneath water spray pipes. It is possible to allow the air supplied to the heat exchanger to flow to the space formed between each of water spray pipes, minimizing air resistance.
Patent KR-20000023776-A (KR)
Inventor: GLLIK MICHAEL
IPC: G01R1/04
Filed: 1999-01-14
Abstract: PURPOSE: A socket for positioning IC chips on flexible connection sheet are provided to surely inspect a great number of sub circuits. CONSTITUTION: A socket for positioning IC chips on flexible connection sheet(20) comprises a base(30) having a recess(34), units(38,39) for determining the direction of a chip on the recess, a moving member(56) and an inserting unit. An elastic body(44) is inserted into the recess of the base. The moving member(56) is movable between an opening position and a closing position. The inserting unit connects plural terminals with the elastic body by embedding the terminals into the elastic body through the moving member.
Patent KR-20000067952-A (KR)
IPC: G02B6/44
Filed: 1997-07-21
Abstract: 본 발명은 방사 경화성, 광유리 섬유 코팅 조성물에 관한 것으로, 상기 방사 경화성, 광유리 섬유 코팅 조성물을 경화하기에 충분한 방사 레벨로 노출될 때 충분히 무색이 되는 양으로 나타나고 방사로 노출되는 발색 특성을 파괴할 수 있도록 하기 위해 선택된 적어도 하나의 발색 지시와, 적어도 하나의 방사 경화성 올리고머 또는 모노머를 포함하는방사 경화성, 광유리 섬유 코팅 조성물을 제공하기 위한 것이고, 이때  상기 적어도 하나의 발색 지시는 경화된 형태의 상기 방사 경화성, 광유리 섬유 코팅 조성물의 기본 색으로부터 구별가능한 색을 가지며, 본 발명은 또한 코팅 조성물을 제조하기 위한 방법을 제공하고, 섬유 연신 타워상의 코팅된 광유리를 제조하는 방법과 코팅된 광유리 섬유를 더 제공하는 것을 특징으로 한다.
Patent KR-20000029533-A (KR)
Title: Removal of material by radiation applied at an oblique angle
Inventor: ENGELSBERG AUDREY C
IPC: H01L21/306
Filed: 1997-07-22
Abstract: PURPOSE: A device is provided for removal of undesired material without altering the physical properties of the material underlying or adjacent the removed, undesired material. CONSTITUTION: An apparatus (10) and method for removing undesired material from the surface of a substrate (12) provides a flow (18) of inert gas over the undesired material substrate surface while irradiating (11) the undesired material with energetic photons directed at an angle (8) that is oblique to the substrate (12). In certain circumstances, the non perpendicular incidence permits effective removal where normal incidence caused damage to the substrate or poor removal or both.
Patent KR-20000035836-A (KR)
Title: Semiconductor device
Inventor: TANBA AKIHIRO
IPC: H01L25/04
Filed: 1996-09-06
Abstract: PURPOSE: A device is provided for a highly reliable power semiconductor module to be realized at a low cost. CONSTITUTION: A semiconductor device is provided with a metal substrate, a plurality of wires fixed to the substrate through an insulating layer, and power circuit section electrically connected to the wires. The power circuit section is provided with a plurality of circuit parts which are electrically connected to the wires and respectively united, and a plurality of terminals which are bonded to the wires.
Patent KR-20000048692-A (KR)
Title: Upper closure of a portable telephone and method of producing the upper closure of the portable telephone
Inventor: TOYOOKA NAOTO
IPC: B29C45/14
Filed: 1997-09-26
Abstract: PURPOSE: A device is provided for a bit machine parts and a good intensity and waterproof product, and upper closure of a portable telephone including a transparent indication window. CONSTITUTION: On the uppermost layer constituted of a transparent base film (3) are laminated a character/symbol layer (6) for displaying at least characters or symbols and a color layer (7) for forming a transparent indication window (21) of a device for indicating a portable telephone. Thereon, furthermore, a picture film (1) on which a transparent adhesive layer (15) is laminated is adhered via the transparent adhesive layer (15) onto a transparent resin molded article (17) of the shape of an upper closure of the portable telephone having a through hole (22) for voice output and a through hole (23) for push buttons. Thereafter, the picture film (1) is removed from at least the through hole (22) for voice output.
Patent KR-20000057153-A (KR)
Title: Asphalt modified with olefin/vinylidene aromatic monomer interpolymers
Inventor: BREDEWEG CORWIN J
IPC: C08F210/18
Filed: 1997-07-10
Abstract: PURPOSE: Bitumens can be blended with interpolymers prepared from at least one olefin and at least one vinylidene aromatic monomer and, optionally, at least one diene. The interpolymers prepared from monomers containing a diene are new compositions of matter. When the interpolymers prepared from monomers containing a diene are blended with a bitumen, the blends are crosslinkable. CONSTITUTION: A substantially random interpolymer comprises (1) from about 30 to about 80 percent by weight of polymer units derived from at least one olefin having from 2 to 10 carbon atoms; (2) from about 20 to about 80 percent by weight of polymer units derived from one or more vinylidene aromatic monomer; and (3) from about 1 to about 20 percent by weight of polymer units derived from one or more dienes having 4 to 10 carbon atoms; the total percent by weight of components (1), (2) and (3) being 100.
Patent KR-20000057285-A (KR)
Title: Multi-channel, interferential wave, micro current device and methods for treatment using micro current
Inventor: SUZUKI JAMES Y
IPC: A61N1/36
Filed: 1997-11-13
Abstract: PURPOSE: A multi-channel, interferential wave, micro current device is provided which is useful for the treatment of edema or other indications. CONSTITUTION: A device typically has a power supply (18), a frequency generator, a pulse generator, a pulse envelope generator, an electrical current controller (10), and four or more channels for applying micro amperes of electrical current to patient tissue. Each channel has two electrodes (11) for completing a micro electrical current circuit through patient tissue. The controller (10) provides a controlled amount of current in each channel from about 20 micro amperes to about 200 micro amperes at a frequency up to about 300 Hertz. Also provided are methods for treating lymphedema, edema, fibrosis, and fibro-mylagea by application of interferential wave form micro current.
Patent KR-20000069309-A (KR)
IPC: H04W4/90
Filed: 1997-12-04
Abstract: 비상 셀룰러 전화는 배터리로부터 직접 전력을 수신하여 연속적으로 작동하는 저전력 타이머를 포함한다. 타이머는 주기적으로 배터리 테스트를 시행하여, 만일 전화가 OFF상태에 있는 동안에 배터리 경보를 발한다. 타이머는 규정된 간격으로(예컨대, 하루에 한 차례 또는 일주일에 한 차례) 전화를 "작동"(전력-업)시킨다. 각 타이머가 제어하는 "작동" 이후에, (배터리에 부하로 배터리전압을 측정하거나 또는 다른 통상적인 배터리 충전량 감시기술을 사용하여) 잔여 배터리 용량을 추정하기 위하여 프로세서가 테스트를 수행한다. 만일 잔여 배터리 용량이 충분하다면, 전화기의 프로세서는 턴오프되고 그리고 타이머가 재기동한다. 만일 잔여 배터리 용량이 낮다면, 경보가 발한다. 저배터리 경보는 전화로부터의 청각적인 또는 시각적인 경보와 같은 통상적인 방법을 사용한다. 부가적으로, 저배터리 경보는 키 패드 및/또는 시스템 커넥터를 통해 사용자 또는 설치자가 전화에 로드한 규정된 번호로의 자동 무선전화호출로 구성될 수 있다. 호출된 번호는 사용자의 지상전화번호, 다른 셀룰러 전화번호 또는 설치자 번호일 수 있다. 전화호출을 통해 전송된 경보는 가청 톤, 톤과 음성합성 메시지의 조합 또는 데이터로 구성될 수 있다.
Patent KR-20000062341-A (KR)
Title: 비선형 응답을 제공하는 장치
IPC: G06G7/28
Filed: 1997-11-17
Abstract: 본 발명은 선형 입력에 응답하여 비선형 함수를 출력하는 증폭기에 관한 것이다. 비선형 응답은 불연속적인 선형 근사이다. 이 증폭기의 회로는 램핑(ramping) 전압을 출력하는 OP 앰프 및 그 램핑 전압의 기울기를 변화시키는 일련의 단(stage)을 포함한다. OP 앰프의 출력이 특정 브레이크점에 도달함에 따라, 회로의 추가단은 활성화되어 출력의 기울기를 변화시킨다. 새로운 선 세그먼트는 새로운 기울기를 가져서 이 모든 단의 조합은 비선형 응답에 근사한다.
Patent KR-20000071051-A (KR)
IPC: A01N47/12
Filed: 1998-02-13
Abstract: 본 발명은 농약의 활성 성분으로 유용한 신규 화합물에 관한 것이다.  특히 하기 화학식 I의 아크릴로니트릴 화합물 또는 그의 염에 관한 것이다. 
     <화학식 I> 
     
       
     
     상기 식에서, 
     Q는 이고, 
     Y는 =C(R 4 )- 또는 =N-이고, 
     R 1 은 알킬, 할로알킬 등이고, 
     R 2 와 R 3 각각은 할로겐, 치환될 수 있는 알킬, 치환될 수 있는 알케닐 등이고, 
     R 4 는 수소, 할로겐, 알킬 또는 할로알킬이고, 
     l은 1 내지 4이고, 
     m은 0 내지 5이고, 
     n은 0 내지 3이고, 
     q는 0 내지 4이고, 
     l이 2 이상인 경우, 복수의 R 2 는 동일하거나 상이할 수 있고, 
     m, n 및 q가 각각 2 이상인 경우, 복수의 R 3 는 동일하거나 상이할 수 있다.
Patent KR-20010068515-A (KR)
Inventor: JUNG TAE GYEONG
IPC: H01L23/48
Filed: 2000-01-06
Abstract: PURPOSE: A semiconductor package and a manufacturing method thereof are provided to enhance reliability of a semiconductor package by blocking a path through which moisture is infiltrated into an inside of the package from the outside. CONSTITUTION: A beam lead(14) is formed on a base film(13) at a predetermined pattern. The base film(13) is formed of polyimide, for example. The beam lead(14) is a copper wire. Only the gold plated beam lead(14) without a base film is exposed on a tape substrate on a chip pad(12) side. Accordingly, the beam lead(14) can be connected to the chip pad(12) by a pressing power applied from the outside in a physical manner. An encapsulant(18) is filled in the connect part of the beam lead(14) and the chip pad(12). The encapsulant(18) is also formed on an outer wall of the package(10). A cover film(20) is formed on a part of the base film(134) and the encapsulant(18) on the beam lead(14) side. A delamination phenomenon is generated between the encapsulant(18) and the beam lead(14) even under a poor environment like a reliability test. Because of the delamination, moisture is easily infiltrated into an inside of the package. However, the cover film blocks the moisture from being infiltrated into the package.
Patent KR-20010068836-A (KR)
Title: Advertising apparatus utilizing simulation investment game on internet and the method thereof
Inventor: LEE CHANG HYEON
Filed: 2000-01-10
Abstract: PURPOSE: A device and method for an advertisement using an Internet imitation investment game is provided to offer information and an advertisement with respect to an investment by progressing an imitation investment game. CONSTITUTION: If a client connects to the Internet and inputs the client's ID and password, the client is confirmed by comparing the inputted ID and password with member information stored in a member information database(N1). If the client is identified as a member, the client receives a keyword of an investment item(N2). Investment information responded to the inputted keyword is read in an investment information database unit and the investment information is displayed on an investment information window being allocated in an image displaying area as an image or a character form. In addition, news information and advertisement information responded to the keyword is read from a news information data unit and an advertisement database unit. The investment information, news information and advertisement information is outputted as an image or a character form(N3). If the investment information window being displayed in the client is selected, the window is closed and the current mode is converted into a mode for performing an imitation investment game(N4).
Patent KR-20010073956-A (KR)
Title: Device for discharging steam
Inventor: KWON MAN HYUN
IPC: A47J36/10
Filed: 2000-01-24
Abstract: PURPOSE: A vapor discharger is provided to discharge vapor smoothly by adjusting the discharge amount of vapor depending on a temperature in a case. CONSTITUTION: Vapor is generated to boil a food in a cooking vessel when the food is heated. If the temperature in the vessel is lower than a specific temperature, the edge of a valve member(42) is closely adhered to a lower protrusion(33a) in a vapor discharge pipe(33). A vapor path(34) is closed to isolate vapor in the vessel. A valve body(40) is operated and the vapor discharge pipe is opened to discharge vapor to outside when the temperature in the cooking vessel reaches the specific temperature. The edge of the valve member is raised up and separated from the lower protrusion even though the valve member is distorted by heat from the cooking vessel. The vapor is discharged out of the vessel through a discharge port(41a) of a support plate(41) and a vapor discharge port(50a) of a cap(50). Therefore, vapor pressure in the cooking vessel rises up to prevent a cap(20) from being moved or food from overflowing.
Patent KR-20010076730-A (KR)
Title: Thin film transistor substrate for liquid crystal display and manufacturing method thereof
Inventor: YOO CHUN GI
IPC: H01L29/786
Filed: 2000-01-27
Abstract: PURPOSE: A thin film transistor for a liquid crystal display and a fabrication method thereof are provided to strengthen the structure of a contact part and to simply the fabrication process of a substrate for the LCD using a polycrystalline silicon. CONSTITUTION: A semiconductor layer(20) is formed which includes a source and a drain region(24,26) doped with an impurity and located on both sides of a transparent insulation substrate(10) and an undoped channel region(25) located between the source and the drain region. A gate insulation film(30) is formed on a center of the semiconductor layer. A gate line(42) and a gate interconnect including a gate electrode(44) located on the channel region of the semiconductor layer are formed on the gate insulation film. The gate interconnect includes a sustain electrode line(46) applied with a voltage from the external. An interlayer insulation film(50) is covered on the gate lines, the gate insulation film and the semiconductor layer. Contact holes(54,56) revealing the source and the drain region of the semiconductor layer respectively are formed on the interlayer insulation film. And a data interconnect comprising a tri-layered film(691,602,603) is formed on the interlayer insulation film. The data interconnect includes a data line(62) defining a pixel and a drain electrode(66) separated from the source electrode and connected to the data line. A passivation insulation film(70) is formed on the interlayer insulation film, and a contact hole(76) revealing an upper film(603) of the drain electrode is formed on the passivation insulation film. A pixel electrode is formed on the passivation insulation film with an ITO(Indium Tin Oxide) or an IZO(Indium Zinc Oxide).
Patent KR-20010081769-A (KR)
Title: Still image encoding/decoding method supporting backward channel for error resilient transmission
Inventor: CHO DAE SEONG
IPC: H03M7/30
Filed: 2000-02-18
Abstract: PURPOSE: A method for coding and decoding a still texture supporting a backward channel for error resilience is provided to transmit a data error, partition information of corresponding data, an error rate, and server node information to a server by installing a backward channel in a decoder. CONSTITUTION: An indicator for displaying a using state of a backward channel(40) according to each still texture object is confirmed from compressed still texture object information. A coding method of the still texture is confirmed from the compressed still texture object information. An error is checked in coding units according to the coding method. Backward information including an error in coding units and an identification number of the next receiving coding units is obtained. The backward information is transmitted through the backward channel(40).
Patent KR-20010100240-A (KR)
IPC: B29C47/00
Filed: 2000-03-23
Abstract: 고무 강화 스티렌계 열가소성 수지 조성물(A)을 함유하여 이루어지는 조성물로서, (1) 그 열가소성 수지 조성물의 아세톤 가용성분의 Z평균분자량/중량평균분자량(Mz/Mw)가 2이상, (2) 그 아세톤 가용분 중에 존재하는 아크릴로니트릴 단량체 단위의 3연 시퀀스의 비율이 그 아세톤 가용분에 대해 10wt%이하이고, 내약품성, 압출성형성, 진공성형성 및 외관성에 우수한 열가소성 조성물 및 그것을 이용한 압출성형품.
Patent KR-20010092915-A (KR)
Title: Method for manufacturing color filter of solid-state image pickup device
Inventor: KIM SANG SIK
IPC: H01L27/146
Filed: 2000-03-27
Abstract: PURPOSE: A method for fabricating a color filter of a solid state imaging device is provided to improve resolution by obtaining a balanced spectral characteristic of each color of a color filter layer. CONSTITUTION: A photo diode is formed on a light receiving portion(a) of a semiconductor substrate(10). A charge transfer area is formed on a charge transfer portion(b). A charge transfer electrode(12) is formed on the charge transfer area. A shielding layer(14) is formed on an array area except the light receiving portion(a). An insulating layer(16) is formed on the shielding layer(14). A pad(22) for transferring an electric signal is formed on a pad area. A planarization layer(18) is formed on the whole surface of the semiconductor substrate(10). A color filter layer(20) is formed on the planarization layer(18). A protective layer(24) is formed on the color filter layer(20). The pad(22) and a scribe line is exposed by etching the planarization layer(18) and the protective layer(24) partially. A photo-resist is applied on the protective layer(24). A micro lens(26) is formed by performing a patterning process and a flow process.
Patent KR-20000071515-A (KR)
Title: 콘덴서용 적층 필름
Filed: 2000-03-30
Abstract: 본 발명은 금속화 필름과 적층, 권취하는 시점에서 주름이 발생하는 것을 방지하고, 유전체 필름과 금속화 필름의 밀착을 충분하게 하여 콘덴서의 파괴 방지, 수명 등의 성능향상을 도모한다. 이를 위하여 유기 입자 또는 무기 입자를 함유하는 공중합 폴리에스테르층이 폴리에스테르층의 적어도 한면에 적층된 적층 필름으로된 것을 특징으로 하는 콘덴서용 적층 필름이 제공된다.
Patent KR-20000036996-A (KR)
Inventor: CHOI WON YOUNG
IPC: C02F3/32
Filed: 2000-04-04
Abstract: PURPOSE: A structure is provided, which is characterized in that structure is made from plastic, so structure is light, and strong. So that, management is easy. CONSTITUTION: A structure has four apparatuses; Upper frame have fences(10), and have square upper frame which is formed from several straight pipe(2) having styrofoam in interior; net of fences(12) is hung down under fences(10); styrofoam plate has holes to feed plants; fence wall is formed by rope connected to holes. The structure is able to use in both deep and shallow water. Microorganisms living at the body of plants use much of oxygen. So that, the structure removes phosphate by plants, and removes organic by bacteria.
Patent KR-20010095610-A (KR)
Title: Method for serving merchandise advertisement was accepted on the Internet
Inventor: KIM GI HYEON
Filed: 2000-04-11
Abstract: PURPOSE: A method for a relay service of a product advertisement received through the Internet is provided to insert an advertisement in a not-concerned product and to sell the product by collecting advertisers and manufacturers thereby contracting an advertiser with a manufacturer. CONSTITUTION: A user certifying operation is performed by connecting to an advertisement receipt server for receiving an advertisement relay service through the Internet(S100). A kind of a client connected to the advertisement receipt server is selected(S200). It is judged whether the kind of the selected client is an advertiser client(S300). If the kind of the selected client is an advertiser client, ordering data are inputted for performing an advertisement(S310). If the kind of the selected client is a manufacturer client, receiving data are inputted for receiving an advertisement(S400). The inputted ordering data and receiving data are stored, respectively(S500). An accorded data out of the stored ordering data and receiving data are detected(S600). An advertisement contract between an advertiser client and a manufacturer client registering the corresponding ordering data and receiving data is concluded(S700). An advertisement is printed on a predetermined portion of products manufactured in the manufacturer, respectively, in accordance with the contract(S800), and the products are sold(S900).
Patent KR-20010095674-A (KR)
Title: Combined door struture of design locker for the use of students
Inventor: PARK HYUK KOO
IPC: E05D7/00
Filed: 2000-04-11
Abstract: PURPOSE: A door coupling structure of a school cabinet is provided to prevent the flexure or separation of a door by coupling a door firmly and to reduce the maintenance expenses of a school cabinet by keeping firmness for a long term. CONSTITUTION: As for a door coupling structure of a school cabinet, whose main body(10) composed of a horizontal partition plate(11), a vertical partition plate(12) and a door(13), an upper projection and a lower projection are fitted on the upper and lower ends of the shaft part of the door(13) and a spiral pipe coupled with a stay bolt are installed to pass through the shaft part of the horizontal partition plate(11) where the upper and lower projections are installed.
Patent KR-20010029659-A (KR)
Title: Memory device and memory card
Inventor: KATAYAMA KUNIHIRO
IPC: G06F11/10
Filed: 2000-04-25
Abstract: PURPOSE: To shorten time required for readout by allowing an error correcting circuit to output an error state signal indicating whether an error has occurred after syndrome generation and then outputting readout data again according to whether there is an external request. CONSTITUTION: The error correction circuit 10 sequentially receives data of one sector read out of a memory array and a syndrome generating circuit 11 generates a syndrome according to them. An error decision circuit 12 checks whether the generated syndrome is all '0' to decide whether the readout data has an error. Further, a correction position information generating circuit 13 generates position information on the bit where the error is present from the generated syndrome. When the three bytes outputted from the correction position information generating circuit 13 all match one another, a coincidence detecting circuit 14 decides that the bytes have the error and outputs the readout data again according to whether there is an external request.
Patent KR-20010103495-A (KR)
Inventor: MIN YEONG GYU
Filed: 2000-05-10
Abstract: 본 발명은 브레이크 부스터에 관한 것으로서, 특히 푸쉬로드의 형상을 3중으로 단을 주고 스프링을 두 개 설치함으로써 부품수를 대폭 절감하여 제작비용을 절감하는 동시에 단순화에 의해 불량 확률을 저하시킬 수 있는 브레이크 부스터에 관한 것이다. 
     상기한 목적을 달성하기 위한 본 발명은 푸쉬로드에 2개의 단이 형성되어 있고, 전방의 단에는 콘트롤 밸브를 지지하는 스프링이 설치되어 있고, 후방의 단에는 푸쉬로드를 지지하는 스프링이 설치되어, 부품을 3개 이상 절약함으로써 제작 단가를 낮추고 단순화에 의해 불량 효율을 저하시킬 수 있는 효과를 제공한다.
Patent KR-20010104921-A (KR)
Inventor: KIM SUN JA
Filed: 2000-05-16
Abstract: 본 발명은 유채를 주재료로 한 퓨전유채김치 제조 방법에 관한 것으로, 좀 더 구체적으로는 김치가 가지는 여러가지 기능이 현대인들의 식생활에서 부족하기 쉬운 여러가지 면역기능을 활성화하고 면역성을 강화하고 젓산 발효 채소로서 생체리듬조절과 질병회복효과등이 있는 것으로 판명된 것에 더하여 전통적인 김치를 유채가 주원료가 되도록 제조함으로써 색다른 신선한 맛을 느끼게 하였고, 풍미를 향상시켰을 뿐만 아니라 유채에 함유된 영양소가 어우러져 건강을 증진시킬 수 있도록 하는 퓨전유채김치 제조방법에 관한 것이다. 
     이는 유채 54중량부를 천일염 2%에 1시간동안 절인후 건져서 탈수시켜 준비한 후, 양념으로는 달래 3중량부, 대파 3중량부, 쪽파 3중량부, 겨자잎 1.5중량부는 5cm길이로, 홍피망 4중량부는 3cm길이로 썰고, 마늘 5중량부, 생강 1.5중량부, 양파 5중량부, 배 4.5중량부를 간 것으로 준비하여 상기 재료들과 함께 섞고, 고추가루 3중량부, 멸치액젖 6중량부, 설탕 3중량부, 소금 0.5 중량부로 버무려서 퓨전유채김치를 제조함으로서 이룰 수 있는 발명이다.
Patent KR-20010105680-A (KR)
Title: Histogram Equalization device using block histogram in image signal processor
Inventor: KANG HOE SIK
IPC: H04N5/57
Filed: 2000-05-17
Abstract: For the purpose of conducting injection molding of an aromatic polyester preform through advantageous exposure of a melt of the aromatic polyester to a reduced-pressure atmosphere, the production of an aromatic polyester preform is conducted by the use of a molding machine provided with vent holes at specified positions in order to evacuate the machine, whereby a preform lowered in acetaldehyde content can be advantageously produced.