baber/WOPTO huggingface dataset:
Patent KR-20160128164-A (KR)
Title: Electrochemical cell, electrochemical cell module comprising electorchemical cell and Preparation method of electrochemical cell
Inventor: CHOI KYOUNG HWAN
IPC: H01M50/497
Filed: 2015-04-28
Abstract: The present invention relates to an electrochemical cell, an electrochemical cell module including the same, and a preparation method of an anode architecture, comprising: an anode architecture having one side and the other side; and a cathode having one or more bending units and having ionic continuity with one side and the other side of the anode architecture. The anode architecture includes: a metal anode; and an active metal ionic conductive membrane architecture disposed between the anode and the cathode and having one or more bending units. Therefore, the present invention can improve energy density of the electrochemical cell by having the active metal ionic conductive membrane architecture and the cathode.
Patent KR-20160128775-A (KR)
Inventor: SHIN KI SUNG
IPC: B60K17/02
Filed: 2015-04-29
Abstract: A transmission of an agricultural vehicle is disclosed. The transmission of an agricultural vehicle, according to an embodiment of the present invention, comprises: a forward-reverse shift part; a main shift part which is for the primary shift of multiple steps; and a high speed-low speed shift part which performs a secondary shift for increasing or decreasing the speed of the primarily shifted forward or reverse power outputted from the main shift part, thereby enabling a wide range of speed change from a low-speed step to a high-speed step through the multiple steps of speed change.
Patent KR-20150125608-A (KR)
Inventor: KAWANO MASAMICHI
IPC: C22C38/26
Filed: 2015-04-30
Abstract: The present invention relates to steel for a mold and a mold manufactured by a lamination process by using the steel for a mold, which is composed of: C more than 0.25% and less than 0.38%; Si more than 0.01% and less than 0.30%; Mn more than 0.92% and less than 1.80%; Cr more than 0.8% and less than 2.2%; Mo more than 0.8% and less than 1.4%; V more than 0.25% and less than 0.58%; a remaining amount of F, and inevitable impurities(all compositions are given in mass%).
Patent KR-20150061624-A (KR)
Inventor: PARK TAE JIN
IPC: H04N21/235
Filed: 2015-05-13
Abstract: An embodiment of the present invention provides a method for transmitting digital broadcast. The method includes the steps of: multiplexing subsidiary stream including video data, audio data, an event information table (EIT), and a program map table (PMT) into MPEG-2 transport stream wherein the EIT or the PMT includes a caption descriptor including caption information and the caption descriptor includes the caption information indicating whether caption data, included in the video stream, provide a digital closed caption service according to electronic industry association (EIA)-708 or provide an analog closed caption service; and modulating the multiplexed MPEG-2 transport stream into broadcast signals and then transmitting the broadcast signals.
Patent KR-20160133939-A (KR)
Inventor: HWANG KYUNG HWAN
IPC: A43B23/02
Filed: 2015-05-14
Abstract: The present invention relates to a preparation method of a shoe upper material using a byproduct of natural leather. The prepared shoe upper material has tensile or tearing physical property values equal to the properties of natural leather, and has excellent water resistance. Also, the prepared shoe upper material can effectively maintain durability and elasticity even under repeated external force and contact. The preparation method can prepare such shoe upper material at low costs. The preparation method of the shoe upper material comprises: a raw material preparation step (1) of preparing a byproduct generated from a manufacturing process of natural leather; a pulverization step (2); a water mixing step (3) of forming a mixture by mixing the pulverized product with water; a neutralization step (4) of changing the pH of the mixture to a neutral state by adding sodium hydroxide; an oil addition step (5) of adding oil for leather; a binder mixing step (6) of mixing an aqueous polyurethane binder, and mixing the resultant product; a molding step (7) of molding the resultant product into a plate form, and forming a plate having a fixed width by compressing and drying the resultant product; a fabric lamination step (8) of laminating a fabric composed of a natural or a synthetic fiber material; and a surface treatment step (9).
Patent KR-20160137801-A (KR)
Title: Method for Authenticating Interlocked Transaction by using One Time Code based on Contactless Media
Inventor: KIM JAE HYUNG
IPC: G06Q40/00
Filed: 2015-05-21
Abstract: The present invention relates to a method for authentication associated with a transaction using a one-time code based on a non-contact medium, and more particularly to a method for authentication associated with a transaction using a one-time code based on a non-contact medium, which is performed by a server configured to communicate with a wireless terminal of a user via a designated path. According to the present invention, the method for authentication associated with a transaction using a one-time code based on a non-contact medium comprises: a first step of checking n (1<=n<N) pieces of transaction information, input or selected by a user, among N (N>=2) pieces of transaction information to be input by the user for a non-face-to-face transaction; a second step of checking m (m>=1) pieces of transaction information inquired from a ledger system by using designated information of the n pieces of transaction information; and a third step of generating transaction authentication information including at least one of all the inquired m pieces of transaction information and some of the inquired m pieces of transaction information, and processing the transaction authentication information to be provided to a program included in a wireless terminal of the user. In this case, all or some of the inquired m pieces of transaction information are provided to a chip of a non-contact medium interfaced with the wireless terminal of the user by using the program included in the wireless terminal of the user and are used as a seed of a one-time code dynamically generated by using the chip.
Patent KR-20150134293-A (KR)
Inventor: YOO SOO GEUN
IPC: F21S2/00
Filed: 2015-05-22
Abstract: Published is a light emitting device. When the size of an inputted voltage exceeds a minimum luminous voltage, all light emitting devices emit light irrespective of the size of the voltage. The light emitting devices are connected in parallel as the size of the voltage is small. The light emitting devices are connected in series as the size of the voltage is large. At this time, in the light emitting device, a condenser is connected in parallel.
Patent KR-20160141107-A (KR)
Title: Method and apparatus for testing drifter of rock-driller
Inventor: LEE GEUN HO
IPC: G01L19/04
Filed: 2015-05-28
Abstract: According to an embodiment of the present invention, there is provided a method of testing a rock drill drifter, comprising the steps of: (a) measuring, as initial conditions, pressure and temperature of a fluid in a hydraulic cylinder to be struck by a rock drill drifter and a position of a piston of the cylinder; (b) hitting the hydraulic cylinder with the drifter; (c) measuring the pressure of the fluid and the piston position when striking the hydraulic cylinder; and (d) calculating a striking energy of the rock drill drifter based on the initial conditions and the data measured in step (c).
Patent KR-20150138121-A (KR)
Inventor: HONG SUNG JEI
IPC: C01B31/36
Filed: 2015-06-01
Abstract: The present invention relates to a method for manufacturing nanopowder of silicon carbide. Provided are: a method for manufacturing nanopowder through a grinding process of the silicon carbide with extremely high strength by using a hybrid method of chemical etching treatment and physical grinding, by collecting silicon carbide from silicon sludge generated from a wafer process for a solar battery; and a nanopowder product of silicon carbide manufactured thereby.
Patent KR-20160144179-A (KR)
Title: Method for providing user interface in user terminal including camera
Inventor: RIM JIN WOOK
IPC: H04N5/225
Filed: 2015-06-08
Abstract: A user interface providing method in a user terminal including a camera comprises the following steps of: providing a user interface including a viewfinder object to a display unit of the user terminal wherein an image photographed by the camera is displayed on the viewfinder object; selecting any one edge among edges of the user interface based on orientation information of the user terminal obtained from a gravity sensor installed in the user terminal; and displaying a photographing object around the selected one edge wherein the photographing object controls a photographing operation of the camera.
Patent KR-20160145895-A (KR)
Title: rubber screwdriver
Inventor: PARK JAE SEON
IPC: B25B23/02
Filed: 2015-06-10
Abstract: The present invention is a screwdriver capable of pulling out a ground screw, wherein the screwdriver is covered with a rubber on a conventional screw driver to easily remove a screw.
Patent KR-20160147403-A (KR)
Title: High sensitive moisture absorption earth electrode
Inventor: PARK JONG TAE
IPC: H01R4/66
Filed: 2015-06-15
Abstract: The present invention relates to an earth electrode which enables a felt layer absorbing an electrolyte of the ground with an earth electrode embedded to be separated from a lower end of an electric pole to improve conductivity, has excellent durability due to having a metal material plate, and can simply perform a laying work since the earth electrode is thin and light.
Patent KR-20150072398-A (KR)
Inventor: HEO MIN CHAN
IPC: H01L33/50
Filed: 2015-06-16
Abstract: A light emitting diode chip is disclosed. The light emitting diode chip comprises: a patterned circuit board including a predetermined pattern; a gallium nitride light emitting structure located on the circuit board and including a first conductive semiconductor layer, a second conductive semiconductor layer, and an activation layer interposed between the first conductive semiconductor layer and the second conductive semiconductor layer; and an accumulation structure. Light emitted from the light emitting structure is blue light. The accumulation structure includes a plurality of dielectric pairs including a first material layer having a high reflective ratio and a second reflective ratio having a low reflective ratio. The dielectric pairs include: a plurality of first dielectric pairs formed of a first material layer having a lower optical thickness than the λ/4 for the center waveform of the visible light area and a second material layer; at least two second dielectric pairs formed of the second material layer and the first material layer in which one of the first material layer and the second material layer has a lower optical thickness than λ/4 and one of the first material layer and the second material layer has a larger optical thickness than λ/4; and a plurality of third dielectric pairs formed of the first and the second material layer which have the optical thickness larger than the λ/4.
Patent KR-20170001290-A (KR)
Inventor: JOO JIN YOUNG
IPC: G01S7/481
Filed: 2015-06-26
Abstract: 본 발명은 개선된 레이저 거리 측정 장치에 관한 것으로서, 보다 구체적으로는 개선된 레이저 거리 측정 장치로서, 거리 측정을 위한 레이저를 방사하는 레이저 모듈; 상기 레이저 모듈의 수직 상부에 배치되는 하나의 반사 거울을 구비하고, 상기 레이저 모듈로부터 방사된 레이저를 상기 반사 거울을 통해 반사하여 외부로 방사하고, 외부 물체에서 반사되어 되돌아온 레이저를 상기 반사 거울을 통해 레이저 센서로 반사시키는 광학 모듈; 상기 광학 모듈의 반사 거울의 수직 하부에 배치되어, 상기 광학 모듈의 반사 거울을 통해 반사되어 되돌아온 레이저를 수신하기 위한 레이저 센서; 및 상기 광학 모듈의 반사 거울 상부에 축 결합되도록 배치되어, 상기 광학 모듈의 반사 거울을 회전시킬 수 있도록 구동하는 스캔 모터를 포함하는 것을 그 구성상의 특징으로 한다. 
본 발명에서 제안하고 있는 개선된 레이저 거리 측정 장치에 따르면, 레이저 모듈과 광학 모듈과 레이저 센서 및 스캔 모터를 구비하되, 광학 모듈은 하나의 반사 거울만을 구비하고, 반사 거울의 수직 하부로 대향하는 레이저 모듈과 레이저 센서를 배치 구성하고, 반사 거울을 구비하는 광학 모듈의 상부로 스캔 모터가 배치되는 구조로 구성함으로써, 레이저의 축과 반사 거울 간의 축만을 맞추어 주는 단순한 광학 구조와 함께 레이저 경로를 단순화시키는 기구적인 메커니즘의 설계 구조를 제공하고, 그에 따른 광학 구조의 단순화를 통한 부품 절감과 함께 제품 비용이 절감되며, 양산시의 조립 생산성 및 편의성이 더욱 향상될 수 있도록 할 수 있다. 
또한, 본 발명에 따르면, 반사 거울을 구비하는 광학 모듈의 상부로 축 결합되는 스캔 모터를 구성함으로써, 스캔 모터의 회전을 통한 전방 0~270도 반경의 거리를 측정하고, 사용자가 조정하는 것이 가능하도록 할 수 있다.
Patent KR-20160072764-A (KR)
Title: Rotary compressor
Inventor: TAKEAKI ASHIMORI
IPC: F04C29/00
Filed: 2015-06-30
Abstract: Provided is a rotary compressor capable of keeping the overall dynamic balance, reducing vibration and noise even in the case of the operation at a high speed, and improving the efficiency by installing a connection passage connecting operational chambers formed inside each of multiple cylinders and compressing a coolant. The rotary compressor includes: a housing; a driving motor formed inside the housing, generating power and including a stator and a rotor; and a compressing unit compressing the coolant by receiving the power from the driving motor including the multiple cylinders wherein the operational chamber compressing the coolant is formed. The operational chambers formed in each of the multiple cylinders are formed to have different volumes. A balancer to keep the dynamic balance is formed only in the lower side of the rotor.
Patent KR-20170007625-A (KR)
Inventor: KANG TAE CHANG
IPC: G08C19/02
Filed: 2015-07-10
Abstract: 본 발명에 따른 마이크로그리드 태양광 하베스팅 기반의 에너지 효율화를 위한 에너지 통합 관리 시스템은 태양으로부터 입사되는 빛 에너지를 전기 에너지로 변환하기 위한 복수의 태양전지 모듈; 상기 복수의 태양전지 모듈에 의해 변환된 직류전류를 저장하기 위한 충전용 배터리 데이터 모니터링부; 상기 충전용 배터리 데이터 모니터링부에 저장된 직류전류를 교류전류로 변환시켜 전력계통에 교류전류를 공급하기 위한 인버터 데이터 모니터링부; 상기 복수의 태양전지 모듈로부터 충전용 배터리 데이터 모니터링부로 공급되는 전력량 및 충전량과, 상기 인버터 데이터 모니터링부로부터 전력계통에 공급되는 전력 공급량을 감지하기 위한 데이터 컨트롤러; 상기 데이터 컨트롤러에 연결되며, 기상 정보를 수집하여 상기 데이터 컨트롤러에 기상 정보 데이터를 제공하기 위한 기상 정보 수집기; 상기 복수의 태양전지 모듈에 설치된 전압-온도 무선 측정 센서; 및 상기 전압-온도 무선 측정 센서를 통해, 상기 데이터 컨트롤러와 양방향으로 데이터를 무선 통신하여, 상기 복수의 태양전지 모듈의 전력량 및 충전량과 전력계통에 공급되는 전력 공급량을 측정 및 관리하기 위한 데이터 웨어 하우스;를 포함하는 것을 특징으로 한다.
Patent KR-20160123936-A (KR)
Title: Smart watch
Inventor: KO DONG SEUCK
IPC: G04C10/00
Filed: 2015-07-14
Abstract: The present invention relates to a smart watch which simultaneously has the functions of an analog watch and a smart device. The smart watch comprises: a case; one or more physical hands which are located in the case and display a current time; a display part which is located under the hands in the case and displays various information; and a movement which is formed to rotate the hands and is connected to the hands through the display part in the case.
Patent KR-20160049439-A (KR)
Title: 랩을 개봉하는 수단 및 방법
Inventor: PARK SUNG GUI
IPC: B65D75/58
Filed: 2015-07-16
Abstract: 본 발명은 랩으로 포장된 각종 포장물을 간편하게 개봉하여 사용자에게 편리함을 제공하는 방법을 제공하고, 아울러 랩의 표면에 부착된 스틱커에 해당 음식물이나 물품 제조자의 상호명이나 연락처 등을 표기하여 광고효과를 높이거나, 제조자의 연락처 등을 확인하여 교환 등의 사후관리를 위하여 제공할 수 있는 립으로 포장된 포장물을 간편하게 개봉하는 방법에 관한 것이다.
Patent KR-20170009484-A (KR)
Title: Apparatus for driving light emitting diode lamp
Inventor: KAZUHIKO YAMAGUCHI
IPC: G01R19/10
Filed: 2015-07-17
Abstract: The present invention relates to a lighting apparatus, and more particularly, to an apparatus for driving a linear tube-type light emitting diode lamp having a shape similar to a luminescent lamp. As for an apparatus for driving a tube-type light emitting diode lamp having sockets at both sides thereof, the present invention includes: a first socket and a second socket connected to the both sockets, respectively; a first resistor and a second resistor connected to the first socket and the second socket, respectively; a first relay unit and a second relay unit connected to the first resistor and the second resistor, respectively, and including a relay and a relay drive coil; a main circuit for supplying power to the lamp; an auxiliary circuit for supplying the power to the relay drive coil; and a rectifier circuit integrated with the main circuit and the auxiliary circuit, and having one end connect to the first relay unit and another end connected to the second relay unit.
Patent KR-20160051561-A (KR)
Inventor: IM BYUNG HO
IPC: A47B13/00
Filed: 2015-07-27
Abstract: The present invention relates to an assembly type table. The assembly type table includes: a top plate having at least two plate members, and an inserting groove which is processed to pass through the plate members such that the bottom surface of the inserting groove is open; a connecting member inserted into the inserting groove to be fixed; a supporting member coupled to the connecting member; and legs mounted to the supporting member. Accordingly, the connecting member is easily inserted into the inserting groove, and the plate member is supported while being provided with a tolerance for deformation and distortion caused when the specified time has elapsed.
Patent KR-20170014244-A (KR)
Title: Bathroom mirrors
Inventor: LEE DAE HWA
IPC: H05B3/84
Filed: 2015-07-29
Abstract: The present invention relates to a mirror for a bathroom of a house, a studio apartment, an accommodation or the like. In more detail, the mirror is fixated to an interior of a frame formed using an extruded material. A mirror placing part, a heater placing part, and a reception space part are formed on the frame to allow the mirror, a heating element, a power control part, a converter, a switch, a sensor or the like to be fixated. A finish cover is coupled to a rear surface of the mirror using the frame such that when a user approaches, power is automatically applied to the heating element through the sensor to prevent fog from forming on a surface of the mirror by heating the mirror using conductive heat; thereby allowing the mirror to conveniently be used. Problems and damage to the control part, the converter, the heating element or the like, which are embedded due to exposure to humidity and moisture on the front and rear surfaces of the mirror are able to be prevented through waterproof treatment between the frame and the mirror and waterproof-treat with respect to the rear surface of the mirror, thereby extending the service life. Operation of the sensor and operation of the heating element is able to be controlled through a switch, thus allowing economic usage; and the mirror is suitable for mass production because of its superior feasibility of assembly and productivity.
Patent KR-20170016640-A (KR)
Title: Semiconductor apparatus and repair method of the same
Inventor: KIM JONG SAM
IPC: G11C29/00
Filed: 2015-08-04
Abstract: The present technology includes: a fuse array which is configured to store word line fail information; a redundancy latch unit; and a redundancy control unit which is configured to store word line order information generated according to the word line fail information in the redundancy latch unit. Accordingly, the present invention can provides a semiconductor device capable of reducing a circuit area and performing a stable repair operation.
Patent KR-20170017079-A (KR)
Title: Liquid Crystal Display Device
Inventor: CHO HYUNG WOO
IPC: G02F1/1335
Filed: 2015-08-05
Abstract: The present invention relates to a liquid crystal display device. The liquid crystal display device includes a liquid crystal panel, a guide panel, a light source, and an upper case and a lower case accommodating a light source housing. One end of the upper case faces and touches one end of the lower case. According to an embodiment of the present invention, since one end of the upper case and one end of the lower case are in contact with each other without overlapping each other, the bezel width of the liquid crystal display device can be reduced.
Patent KR-20170018205-A (KR)
Inventor: MAENG WAN YOUNG
IPC: C01G23/08
Filed: 2015-08-07
Abstract: 본 발명은 이산화티타늄 박막 제조용 졸 용액 및 이를 이용한 이산화티타늄 박막에 관한 것으로, 보다 상세하게는 티타늄알콕사이드(TBOT), 물, 유기 용매, 안정화제 및 산 촉매를 포함하며, 상기 안정화제는 에틸아세토아세테이트(EAcAc)이고, 상기 산 촉매는 아세트산인, 이산화티타늄 박막 제조용 졸 용액; 및 이를 이용하여 졸-겔 방법에 의한 이산화티타늄 박막의 제조방법 및 그 결과 제조된 이산화티타늄 박막에 관한 것이다.
Patent KR-20170021048-A (KR)
Inventor: KIM WON YONG
IPC: F17D5/00
Filed: 2015-08-17
Abstract: The present invention relates to a visible valve collection box. The valve collection box comprises: a main body of a box shape having a hollow space, wherein a front surface thereof is opened; a pair of inlet pipe holes formed on both sides of the main body to be penetrated by an inlet pipe of gas; an opening door mounted on an opened portion formed on the front surface of the main body; a see-through window formed on the opening door, through which the inside can be seen; a plurality of branch pipe holes formed on a rear surface of the main body to be penetrated by a plurality of branch pipes branching from the inlet pipe; and a grille formed on both sides of the main body. Accordingly, the branch pipes branching from the inlet pipe and valves are protected in a concentrative manner. An internal operating state can be easily acquired by the see-through window. The valves can be easily operated by the opening door to increase convenience.
Patent KR-20170023356-A (KR)
Inventor: PARK YONG SEONG
IPC: E04B1/98
Filed: 2015-08-21
Abstract: 본 발명은 기존 철근콘크리트 건축물의 골조에 내진 프레임을 추가로 설치하여 내진보강하는 방법에 관한 것으로, 더욱 상세하게는 구 콘크리트와 신 콘크리트 사이에 앵커볼트 시공시에 앵커볼트와 결합되어 전단 저항을 발휘할 수 있도록 형성되는 충전형 앵커 소켓을 이용하여 기존 건축물의 골조에 내진 프레임을 추가 설치하여 건축물의 내진내력을 보강하는 방법에 관한 것이다. 
본 발명의 적절한 실시형태에 따른 충전형 앵커 소켓을 이용한 내진보강 방법은 (a) 상하부가 개구되고 내부가 비어있는 원통 형상의 본체와, 중앙부에 결합공이 통공되고 본체의 내경과 같은 직경을 갖는 원판형상으로 형성되며 본체의 상단부에서 일정거리 하부로 이격되어 본체의 내부에 결합되는 디스크 플레이트로 형성되는 소켓부와; 중공이 형성된 원통형의 형상으로 디스크 플레이트의 결합공과 중공이 연통되도록 하단부가 디스크 플레이트에 수직으로 결합되어 디스크 플레이트의 상부로 돌출되는 슬리브와; 본체의 내주면과 디스크 플레이트 상부면 및 슬리브의 외주면으로 이루어지는 공간에 채워지며, 콘크리트, 고강도 모르타르, 에폭시, 섬유보강 콘크리트 중 어느 하나로 이루어지는 채움재;로 구성되는 충전형 앵커 소켓을 제작하는 단계; (b) 기존 철근콘크리트 골조의 노출면의 노화된 콘크리트를 제거하는 단계; (c) 기존 골조의 노출면에 일정한 간격으로 앵커볼트 삽입공과 소켓부 하단부 삽입홈을 포함하는 충전형 앵커 소켓용 앵커홀을 천공하는 단계; (d) 충전형 앵커 소켓용 앵커홀에 충전형 앵커 소켓과 앵커볼트를 설치하는 단계; (e) 강재 프레임을 기존 철근콘크리트 골조로부터 일정 간격을 갖도록 설치하는 단계; (f) 강재 프레임과 기존 철근콘크리트 골조 사이 공간에 보강철근을 배근하는 단계; 및 (g) 강재 프레임과 기존 철근콘크리트 골조 사이 공간에 신 콘크리트를 타설하는 단계;를 포함하는 것을 특징으로 한다.
Patent KR-20170024219-A (KR)
Inventor: JUNG HUN MIN
IPC: A23L11/20
Filed: 2015-08-24
Abstract: The present invention relates to a method for manufacturing traditional fermented soybean paste using water-soluble dietary fibers, and traditional fermented soybean paste manufactured by the same. The method comprises the following steps: preparing fermented soybean lumps and immersing the same into salt water with constant salinity (S110); mixing water-soluble dietary fibers in the salt water in which the fermented soybean lumps are immersed (S120); mixing garlic and fast-fermented bean paste (S130); mixing the aged fermented soybean lumps with mixed powder of the garlic and fast-fermented bean paste (S140); and aging the aged fermented soybean lump powder with the mixed powder of the garlic and fast-fermented bean paste for a period of time (S150). According to the present invention, palatability of consumers with respect to traditional fermented soybean paste can be increased, and the appearance, smell, and flavors can be improved.
Patent KR-20170025090-A (KR)
Title: structure of a lid for airtight container
Inventor: LIM JI HYOUN
IPC: B65D43/02
Filed: 2015-08-27
Abstract: The present invention relates to an airtight container lid structure and, more specifically, relates to an airtight container lid structure, which raises sealing ability to prevent outside air from arbitrarily flowing in such that food contained therein is prevented from easily going bad, and injects the outside air thereinto only at the time of opening a lid to easily open the lid such that the food in the container and the state of the food can be easily checked. In order to achieve the objectives described above, the lid structure which seals an opening portion of an airtight container comprises: an insertion portion which is formed to protrude to the lower portion of the lid and is inserted into the opening portion of the container; and an airtight member which is provided on the outer circumferential surface of the insertion portion. The airtight member is provided with a wing portion coming in contact with the inner circumferential surface of the opening portion, outwards at the lower end thereof.