baber/WOPTO huggingface dataset:
Patent KR-20010059362-A (KR)
Inventor: PARK GEUN SUN
IPC: G01K1/08
Filed: 1999-12-30
Abstract: PURPOSE: A temperature measuring apparatus capable of preventing adhesion of dust is provided to improve efficiency of work, to increase the output of crude steel, to reduce malfunction of equipments, and to automatically and exactly control temperature by preventing adhesion of dust. CONSTITUTION: A temperature measuring apparatus capable of preventing adhesion of dust includes a vibration part and a vibration absorbing part. The vibration part has a vibrator(48) inside to vibrate a temperature sensor(34). The vibration absorbing part has a bellows(47) absorbing vibration to prevent vibration of the temperature sensor from being transferred to a duct discharging exhaust gas. The vibration part has a solenoid(45) for operating the vibrator.
Patent KR-20000029439-A (KR)
Title: Semiconductor memory for secure data storage
Inventor: PATHAK SAROJ
IPC: G11C16/28
Filed: 1998-04-24
Abstract: PURPOSE: A semiconductor memory for storing data securely is to provide additional security beyond presently available methods for securing smart cards, thus preventing unauthorized persons from attacking the cards. CONSTITUTION: A memory device includes a sense amp(100) for sensing data stored in a memory cell(102). The memory cell is gated to the sense amp(100) by asserting a bit select line, which turns on a bit select transistor(106a), and by asserting a word select line. A dummy cell(104) is coupled via a bit select transistor(106b) to the sense amp in order to compensate for variations among the plurality of memory cells sensed by the sense amp. The memory device includes a balance circuit which consists of a balance cell coupled to a balance amp(200) through a bit select transistor(206a). A dummy cell(204) is also coupled to the balance amp(200) via a bit select transistor(206b). The bit select transistors(106a,106b,206a,206b) are driven by the same bit select line. The output of the sense amp(100) is coupled to the word select of a balance cell(202).
Patent KR-20000068207-A (KR)
Title: 폭이 가변인 랜드를 갖는 삽입체
IPC: B23C5/20
Filed: 1997-07-30
Abstract: 절단 삽입체(52)는 포지티브 절단 형상을 가지며, 주 절단 엣지(60)의 바닥에서의 가장 협소한 곳으로부터 절단 엣지(60)가 작업부재(45)의 단단한 표면과 만나는 가장 넓은 곳까지 절단부를 따라 폭이 변화되는 절단 엣지 랜드(64)를 제공하므로써 원재료와 기타 다른 외피형 작업부재(45)를 표면 밀링 및 숄더 밀링한다.  절단 엣지가 양쪽 회전 커터로 동일하게 절단되는 이중 단부형 절단 엣지에 있어서, 최대 랜드 폭은 절단 엣지 중간지점이며, 각각의 단부에서 최소 폭으로 경사진다.
Patent KR-20000036220-A (KR)
Title: Calibrating cameras used in alignment of wheels
Inventor: JACKSON DAVID A
IPC: G01B11/00
Filed: 1997-09-11
Abstract: PURPOSE: Calibrating cameras used in alignment of wheels are provided to determine the spatial position and relative orientation of a pair of electronic cameras used to optically determine the alignment of motor vehicle wheels. CONSTITUTION: Calibrating cameras used in alignment of wheels is used for calibrating an opto-electric alignment system used to align motor vehicle wheels. The apparatus including first (162) and second (164) targets rigidly affixed to a beam (160). During calibration both targets are viewed by a first inspection device when the beam is placed normal to the imaginary line connecting the first inspection device and a second inspection device of the alignment system. Then the beam is moved parallel to the imaginary line and the first target is viewed by the first optical inspection device and the second target is viewed by the second inspection device.
Patent KR-20000052703-A (KR)
Title: Image signal sensing process
Inventor: SCHANZ MICHAEL
IPC: H04N5/353
Filed: 1997-10-24
Abstract: PURPOSE: A process for an image signal sensing by means of an array of photosensitive components capable of varying the charge of a capacity is provided. CONSTITUTION: In a process for sensing an image signal by means of an array of photosensitive components(10) capable of varying the charge of a capacity(12), an optical signal(20) from each photosensitive component is at first sensed by the following partial steps: a charge state of the capacity is generated with a predetermined voltage (+U_DD), the charge of the capacity is altered by means of a photo current generated by the optical signal in the photosensitive component or by means of a value derived therefrom, and the voltage through the capacity is sensed after a predetermined period. The sensed voltage is evaluated to verify if it lies within a valid range. If that is the case, a valid signal which characterizes the sensed optical signal is determined on the basis of the sensed voltage. If that is not the case, the above-mentioned steps are repeated, applying a period which differs from the predetermined period, for a predetermined number of times or until the sensed voltage is detected to be in a valid range. Afterwards, the optical signal sensed by each photosensitive component is stored together with the period during which a valid signal was detected. Finally, the image signal is extracted from the stored optical signals for the individual photosensitive components and their respective periods.
Patent KR-20000057487-A (KR)
Inventor: KLEIN JOHANN
IPC: C09D/
Filed: 1997-12-05
Abstract: PURPOSE: Polymers based on a conjugated diene and a dienophilic component are provided which are suitable for coating, gluing, sealing, filling and as materials. CONSTITUTION: A polymer consists of (A) at least one fatty acid with conjugated double bonds and their derivatives, (B) at least one alkene component with electron acceptor substituents, and if required (C) at least one alkene component without electron acceptor substituents. These polymers are obtained by radical polymerization. Peroxides are particularly suitable as radical generators. The molecular weight of the polymers amounts to at least 5,000. They can also be used as thickeners and as emulsion stabilizers.
Patent KR-20000070550-A (KR)
Title: 차단 증진된 진공 금속화된 필름
IPC: B32B27/32
Filed: 1998-01-19
Abstract: 산소 및 수증기의 투과에 대해 증진된 차단 특성을 갖는 다중층 필름이 제공된다. 다중층 필름은 폴리프로필렌 기저층의 적어도 한 면상에 고밀도 폴리에틸렌층을 갖는 폴리프로필렌 기저층을 포함한다. 폴리에틸렌층은 메탄올과 같은 히드록실 공여 물질로 플라스마 처리된 표면을 포함한다. 필름은 진공 증착 알루미늄층과 같은, 플라스마 처리된 표면상에 증착된 금속층을 포함한다. 본 발명에 따른 다중층 필름은 식품 포장 필름으로서 특히 유용하다.
Patent KR-20000076097-A (KR)
IPC: A62C37/50
Filed: 1999-01-07
Abstract: The invention relates to a holder (1) for mounting a spray head for fire fighting, which holder comprises a body (8), a first end (9), a second end (10) and a passage (11) between the first and the second end for conducting extinguishing medium from the first end to the second end, a channel (17) at the second end of the body for receiving the spray head in such a way that a housing (18) of the spray head is inserted into the channel, the first end being intended to receive a conduit (3) for conducting extinguishing medium. For the purpose of preventing extinguishing medium from flowing out of the conduit (3) leading to the spray head, when this is detached from the holder (1), the holder comprises a displaceable element (12) mounted in the passage (11), which element is displaceable from a first position, in which the element closes the passage, to a second position, in which the element keeps the passage open, the element being arranged to be in the first position, when the spray head is not mounted, and to be displaced to the second position, when the spray head is mounted to the holder. The invention also relates to a combination of a holder and a spray head.
Patent KR-20010005540-A (KR)
Title: 멤브레인 스위치용 이축배향 폴리에스테르 필름
IPC: H01H13/702
Filed: 1998-11-20
Abstract: 본 발명은 에틸렌-2,6-나프탈렌디카르복실레이트 반복단위를 적어도 80 몰% 함유하는 폴리에스테르로 이루어지고, 그리고 110 ∼ 160 ℃ 의 온도범위내에, 흡열에너지량이 적어도 0.4 mJ/㎎ 의 흡열피크를 갖는 멤브레인 스위치용 이축배향 폴리에스테르필름에 관한 것이다. 
     이 필름은 상기 폴리에스테르 필름으로부터 자체 공지의 방법으로 제조된 이축연신 폴리에스테르를 필름을,하기 공정:(1) 무긴장하에 150 ∼ 180 ℃ 사이의 온도에서 1 ∼ 5 시간 열처리하는 공정 및 (2) 롤에 감지않은 상태, 또는 롤에 감은 상태로, 80 ∼ 122 ℃ 사이의 온도에서 5 ∼ 200 시간 열처리하는 공정을 그 순서대로 사용함으로써 제조된다.
Patent KR-20010006536-A (KR)
IPC: F02M63/00
Filed: 1999-01-29
Abstract: 니들몸체(5)를 포함하고 있는 연료분사밸브(1)는 내연기관의 연소실(3)로 연료를 직접 분사하기 위해서 내연기관의 실린더헤드(4)의 수용보어(2)에 삽입된다. 니들몸체(5)에 배치된 금속링(6)은 온도가 상승되면 변형하고, 또한 수용보어(2)에 연료분사밸브(1)가 삽입되면 특히 온도가 상승한 경우 연료분사밸브(1)의 밀폐가 레이디얼방향으로 수용보어(2)에서 발생된다.
Patent KR-20010013725-A (KR)
Title: 현상롤러 및 이 롤러를 이용한 현상장치
IPC: G03G15/08
Filed: 1998-06-29
Abstract: 본  발명의  현상롤러(10)는  도전성 샤프트(11)의  주위에  탄성층(12)을,  그  탄성층  위에  단독  또는  복수의  수지층(13)을  적층하여  구성되어  있다.  상기의  탄성층(12)은  50도 이하의  JIS A 경도를  가진다.  또한  단독  또는  복수의  수지층(13)  중에  적어도  최외층에  미립자가  함유되어,  그  최외층의  표면 거칠기(R z )는  3∼15㎛의  범위  내로  조정되어  있다.  또한  상기의  최외층으로서는  -NHCO- 결합을  함유하는  수지 조성물  또는  -ROCO 2 -  및  -SiOSi-의  반복단위와  -NHCO- 결합을  함유하는  수지 조성물을  사용할  수  있다.
Patent KR-20010068453-A (KR)
Inventor: KIM HYUNG KUEK
IPC: A23L2/38
Filed: 2000-01-05
Abstract: PURPOSE: A method for producing an extract of red ginseng by steaming green or white ginseng and adding water is provided to serve the red ginseng extract effective for treating various kinds of diseases and promoting physical health with low cost. CONSTITUTION: The method includes the following steps of: (i) pouring a fixed amount of water in a pot; (ii) placing a tray above the water not to be contacted with the water; (iii) putting white ginseng or green ginseng on the tray and steaming the ginseng at a fixed temperature of about 90deg.C for 24hrs; and then (iv) dehydrating the fully steamed ginseng and boiling down the resulting red ginseng. The pot has a lid with silicon packing and a handle with a slit hole for preventing the water from being decreased and maintaining the inside temperature during the steaming process.
Patent KR-20010075736-A (KR)
Title: Induction Motor having the Stopping Function
Inventor: PARK SANG KYU
IPC: H02K17/26
Filed: 2000-01-17
Abstract: PURPOSE: The induction motor with break function is provided to quickly stop without any waiting and shorten time of stopping to perform following operation without stopping in case for stopping of rotator of the induction motor. CONSTITUTION: The induction motor with break function comprises a housing(10) with a supporting bracket(11), a stator(20) which is fixed inside of the housing(10), formed as a tubular type with laminated thin steel plates and includes a stator coil inserted into slots formed inside the circumference of the steel plate, a rotator(30) which is inserted inside of the stator(20) and formed a rotator conductor into the slots formed outside the circumference of the steel plate, and a rotation shaft(40) which is passed through the center of the rotator(30), supported by bearings and includes a delivering gear(41) installed at one of the ends. The stator(20) forms sloping side to gradually decrease internal diameter of it from the entrance to inside and the rotator(30) forms the cross section to gradually decrease from one side of it in order to be able to tightly inserted inside of the stator(20).
Patent KR-20000071260-A (KR)
Title: 정보 기록 장치 및 방법
IPC: G11B20/12
Filed: 2000-01-18
Abstract: 본 발명은 자기 테이프 상의 모든 데이터를 쉽게 얻게 하며 계측 데이터를 기록할 때 각각의 시스템으로부터 공급된 계측 데이터 및 헤더 정보를 결합하게 하는 정보 기록 장치 및 방법에 관한 것이다.  본 발명에 따라서, 부가 정보 영역은 자기 테이프의 선두에 형성된다.  부가 정보 영역 다음엔 데이터 영역이 온다.  정보 데이터는 데이터 접속기를 통해 버퍼 메모리에 저장된다.  헤더 정보는 제어 명령 외에 헤더 정보 제어 접속기를 통해 국부 메모리에 저장된다.  계측 데이터는 버퍼 메모리로부터 소출되어 자기 테이프의 데이터 영역에 기록된다.  계측 데이터가 기록된 후에, 헤더 정보는 국부 메모리로부터 읽혀져 버퍼 메모리에 저장된다.  헤더 정보는 버퍼 메모리로부터 소출되어 자기 테이프의 데이터 영역에 기록된다.  계측 데이터가 기록된 후에, 헤더 정보는 국부 메모리로부터 읽혀져 버퍼 메모리에 저장된다.  헤더 정보는 버퍼 메모리로부터 소출되어 자기 테이프의 부가 정보 영역에 기록된다.  데이터가 부가 정보 영역으로부터 읽혀질 때, 자기 테이프 상의 모든 내용이 얻어진다.  헤더 정보는 임시로 국부 메모리에 저장된 후 기록되기 때문에, 헤더 정보 및 계측 데이터를 결합하는 처리부를 생략할 수 있다.
Patent KR-20010006586-A (KR)
Inventor: MATSON DUN M
IPC: G21C19/18
Filed: 2000-01-24
Abstract: PURPOSE: A dismountable waste fuel loader-unloader track is provided to get a rail assembly to be separable by making a joint linkage unit which is located between the rail assembly and a fixing rail adjacent to it loose. CONSTITUTION: A support rail(24) transports a rail guide(12). The rail guide(12) supports a rail joint linkage unit(14) to link the rail guide(12) with an adjacent rail. The support rail(24) supports a plurality of jacking screw for lifting up the support rail(24). The joint linkage unit(14) consists of a groove and a tongue including a tapered parting line. The rail guide(12) supports the tongue of the joint linkage unit(14). A rail trench supports a terminal part of the rail guide(12) which extends past the support rail(24).
Patent KR-20010081180-A (KR)
Title: Method of preparing positive active material for lithium secondary battery
Inventor: KIM SU JU
IPC: H01M4/36
Filed: 2000-02-10
Abstract: PURPOSE: An active material for an anode of a secondary lithium electric cell is provided to prevent oxidation of manganese ions and to improve electrochemical properties of the electric cell. CONSTITUTION: An active material for an anode of a secondary lithium electric cell is manufactured by mixing lithium salt and manganese salt, and then having the mixture of the lithium salt and the manganese salt go through a thermal treatment under the reducing gas. Here, the thermal treatment is carried out at 600-900 deg.C for 3 through 48 hours. The reducing gas is preferably CO gas. Also, the mixing ratio of the lithium salt and the manganese salt is 1.3-2.3 to 2.0. The reducing gas can be the mixed gas of CO and non-active gas, wherein the concentration of CO gas against the non-active gas is 10ppm to 10%.
Patent KR-20010083432-A (KR)
Title: KNY Car
Inventor: KIM NAM YOUNG
IPC: B60R99/00
Filed: 2000-02-14
Abstract: PURPOSE: A radar vehicle is provided to install a visual sensor on an end of radar and to inform outside condition into a driver of the vehicle. CONSTITUTION: A vehicle containing a radar comprises a radar stem unit used as a radar; a visual sensor unit attached to an end of the radar stem unit; a monitor unit visually displaying information delivered from the visual sensor unit; CPU(Central Process Unit) and interface terminal unit controlling and calculating input/output signals between the visual sensor unit and a monitor unit; and a driving unit actuating the radar stem unit and the visual sensor unit. The radar vehicle exactly informs the outside condition into a driver in the vehicle to ensure sight. Moreover, the radar vehicle prevents an accident by measuring gap while parking or travelling in narrow space. In addition, the radar vehicle detects obstacles in travelling at night to safely travel.
Patent KR-20010083437-A (KR)
Inventor: PARK JOON SOO
IPC: G06F17/00
Filed: 2000-02-14
Abstract: PURPOSE: An automatic calling service through a web document analysis, a character recognition and a gesture recognition is provided to analyze an Internet web document prepared in the HTML and to develop a parsing technique and a calling technique through a telephone network, and to secure an economic marketability in a specific field and to secure a comparative superiority superior to a foreign service. CONSTITUTION: A web document prepared by the HTML is analyzed automatically, and a telephone number is extracted based on the analyzed result, thus a computer automatically calls to the corresponding institution through a network as a telephone network or the Internet. While a user calls a telephone, contents of an advertisement of the corresponding institution are displayed. If a category of a business to be searched is inputted in a small-sized terminal, a recognized result is transmitted to a central main server using an on-line character recognition and gesture recognition techniques. The central main server analyzes the received information and calls to a superior store being positioned near to the user. An advertisement is displayed to the user and the user may call without pay.
Patent KR-20010081786-A (KR)
Title: Electromotive Room Sunvisor
Inventor: PARK JAE BONG
IPC: B60J3/02
Filed: 2000-02-18
Abstract: PURPOSE: An electromotive in door sunvisor is provided to actuate a link device as a manipulator type by moving with electromotive force and to lift and drop a sunvisor wound a retractor. CONSTITUTION: To spread a sunvisor(2), a button of a controller is pushed to rotate a motor(7). A driving gear(10) rotates clockwise and a slave gear(11) rotates counterclockwise. Thus, links(8a,8b) of both sides rectilinearly moves to the slave gear. Pair of second links(9a,9b) is rotates around a hinge with 90 degrees according to rectilinear movement of the links. Then, the second links are vertically spreads by rotating with a springs(12a,12b) and springs(14a,14b) mounted on a shaft supports(13a,13b). A lower arm of the second link rotates toward an outside and an upper arm of the second link rotates toward inside at the same time. A bar(1) is lifted while the second links are spread to release the sunvisor wound around a winding roll(3). Thereby, the sunvisor is perfectly released.
Patent KR-20010084503-A (KR)
Title: Article Transfer Apparatus
Inventor: YANG SU SANG
IPC: B25J17/00
Filed: 2000-02-26
Abstract: PURPOSE: A workpiece transferring device is provided to improve working efficiency by arranging links in parallel and connecting flexibly, and to reduce the manufacturing cost and working hours with simple structure. CONSTITUTION: A workpiece transferring apparatus is composed of a base(10); a supporting shaft fixed in a first link(30), and extended with a second link(50) to turn the second link; the first link connected to the supporting shaft; the second link connected to the first link; a loading part(120) connected to the second link to transfer the object; a driving motor turning the first link; a rotating shaft installed in the first and second links and rotated by the first and second links; and a turning shaft connected to the rotating shaft, and fixed in the second link and the loading part to turn the second link and loading part. Links are turned with combining the supporting shaft, the rotating shaft and the turning shaft, and the loading part is lifted up vertically. Bevel gears in the rotating shaft of the first link and the turning shaft are engaged at the rate of 2 to 1, and gears in the rotating shaft and the turning shaft of the final link are combined at the rate of 1 to 2. The links are vertically moved up, and the loading part is moved in parallel.
Patent KR-20010084673-A (KR)
Title: Memory device capable of high speed testing with low frequency tester and the method thereof
Inventor: CHAE JUN WAN
IPC: G11C29/00
Filed: 2000-02-28
Abstract: PURPOSE: A memory device capable of a high speed operation test with a low frequency tester and a test method thereof are provided, which can verify a high speed operation with a low frequency tester. CONSTITUTION: A high speed memory device(110) includes a memory core cell region(120) and a peripheral logic region(130). The memory core cell region is a memory block where a plurality of memory cells are arranged in rows and columns. The peripheral logic region(130) includes addresses and control signals which are transferred to the memory core cell region and it includes data paths. The peripheral logic region(130) includes a test mode control logic part(121), a BIST logic part(132) and a high speed interface part(133). While testing the high speed memory device, the test mode control logic part is connected with an external tester(200) and tests the high speed memory device directly according to a test pattern provided from the tester or loads the test pattern onto a part(A) of the memory core cell region. The BIST logic part converts the test pattern loaded on the part of the memory core cell region into a format by which the high speed interface part can receive it.
Patent KR-20000076781-A (KR)
Title: 레지스트 패턴의 형성 방법
IPC: G03F7/30
Filed: 2000-03-07
Abstract: 본 발명은 화학 증폭 포지형 감방사선성 수지 조성물을 포함하고, 습식 현상 전의 레지스트막의 미노광부의 막 두께가 습식 현상 후에 습식 현상 전의 막 두께보다 100 내지 400 Å의 범위로 감소하는 레지스트막인 것을 특징으로 하는 화학 증폭 포지형 감방사선성 수지 조성물로부터의 레지스트 패턴의 형성 방법에 관한 것이다.  상기 방법에서 화학 증폭 포지형 감방사선성 수지 조성물이 (A)산해리성기를 함유하고 산에 의한 산해리성기의 분해에 따라 알칼리 가용성이 증대하는 수지, 및 (B)감방사선성 산발생제를 함유한다.  본 발명에 따르면 습식 현상 후의 막 감소량을 비교적 큰 값으로 유지하여 현상 결함이 없는 레지스트 패턴을 형성할 수 있다.
Patent KR-20010088156-A (KR)
Inventor: SUNG JOO HYUN
IPC: A46B13/06
Filed: 2000-03-10
Abstract: PURPOSE: A rotary air toothbrush is provided to remove the alien material between teeth, which can't be removed after brushing teeth, and to prevent the propagation of bacteria by drying the wet toothbrush completely. CONSTITUTION: The rotary air toothbrush includes a bearing(12), a cylinder(13), a rotor(14), a wing(15) and a driving axis(16). When the high voltage air flows into the cylinder(13), the rotor(14) in the cylinder(13), which is installed inside a toothbrush body, is rotated. The wing(15), which is connected to the rotor(14) is rotated with the high speed. The driving axis(16), which is installed on the front step of the rotor(14), is rotated. The bearing(12), which is connected to the lower part of the rotor(14), activates the rotary movement.
Patent KR-20000030822-A (KR)
Inventor: SIM SUNG SIK
IPC: H04L12/66
Filed: 2000-03-20
Abstract: PURPOSE: A telephone communication system using an internet is provided to connect a client's internet terminal to a counselor's communication terminal by using a telephone communication system. CONSTITUTION: A telephone communication system using an internet comprises a server(6) for loading internet sites(2) of enterprises and connecting communication terminals(4) of counselors of the enterprises, a handset(9), and an internet terminal(8). The server comprises an audio communication system(10). The internet sits comprises a connection button(12) for connecting the internet terminal to communication terminal by using the audio communication system.
Patent KR-20010092219-A (KR)
Title: Continuity check method and apparatus in fiber loop carrier system
Inventor: KIM TAE HYEON
IPC: H04L12/42
Filed: 2000-03-21
Abstract: PURPOSE: A method and apparatus for checking continuity in a fiber loop carrier(FLC) is provided to test continuity of a user cell in an optical subscriber transmission system, to display connections performs the test and discriminate user cells of the connections. CONSTITUTION: A VPC(Virtual Path and virtual channel) table unit(22) is composed as a plurality of addresses. Each address includes a port number, a virtual path identifier(VPI) and a virtual channel identifier(VCI). A user cell state register(24) has a certain storing region, and sets and resets CC bits of the storing region by a certain control. A cell check control unit(20) sets CC request bits in a corresponding address storing region of the VPC table unit(22) based on CC request connection information when CC request information including the port number, the VPI, and the VCI is received from a network. The cell check control unit(20) classifies the CC request bits set in the VPC table unit(22) to set the classified CC request bit as a CC bit in the user cell state register(24) according to a port. The cell check control unit(20) resets the CC bit of the user cell state register(24) corresponding to the CC connection in a user cell when the user cell on the CC request connection is not received during a previously set time, and provides the abnormality of the corresponding connection according to the reset of the CC bit.
Patent KR-20010092612-A (KR)
Title: Separable flowerpot for street beutification
Inventor: KIM JIN SEOK
IPC: A01G9/02
Filed: 2000-03-22
Abstract: PURPOSE: A separable type flowerpot for street is provided to facilitate the exchange of a plant implanted in the flowerpot, and consequently to reduce the maintenance fee of the flowerpot. CONSTITUTION: The separable type flowerpot for street is comprised of an outer flowerpot(12); an inner flowerpot(14) installed in the outer flowerpot in separable manner; and a rim cover(16) for covering the upper end of the outer flowerpot. Thereby, it is possible to easily exchange a plant implanted in the flowerpot by exchanging only the inner flowerpot. In addition, a locking device(18) is installed in the outer flowerpot and the rim cover, and a groove(12a) as a finger hole is formed at a desired position of the upper end of the outer flowerpot to allow a worker to conveniently catch the flowerpot.