baber/WOPTO huggingface dataset:
Patent KR-20020090415-A (KR)
Title: mounting structure of rear stabilizer
Inventor: YOON SEONG JIN
IPC: B60G21/055
Filed: 2001-05-25
Abstract: PURPOSE: Installation structure for a rear stabilizer is provided to improve endurance of a stabilizer bush and assembling force of the rear stabilizer, and to reduce noise and vibration by integrally assembling a reinforcing plate in the bottom of the stabilizer bush. CONSTITUTION: Assembling protrusions(10b,10c) are formed in the bottom of a stabilizer bush(10), and assembling grooves(32,33) are formed in a bush mounting bracket(30). Assembling protrusions are inserted to assembling grooves, and the bush mounting bracket is contacted to the stabilizer bush. Assembling force is improved with integrally forming a reinforcing plate(50) in the bottom of the stabilizer bush, and the stabilizer bush is surrounded by a bush mounting clip(20). Aging of the bottom is prevented against load, and noise is reduced with improving durability.
Patent KR-20010109156-A (KR)
Title: 고형제제 공급 장치
IPC: A61J7/00
Filed: 2001-05-30
Abstract: 병 용기에 알약 등의 고형제제를 충전하기 위한 고형제제 공급 장치에 있어서, 병 용기의 구경이나 알약의 형상 등이 어떠한 경우라도, 안정되게 알약을 충전할 수 있는 고형제제 공급 장치를 제안한다. 
     고형제제를 슈트(6)에 일시 보류하기 위해, 이 슈트(6)에 슬라이드 가능하게 설치되고, 또한 제1 결합부(27A)를 구비하는 제1 구획판(27)과, 이 슈트(6)에 슬라이드 가능하게 설치되고, 제1 구획판(27)이 소정량 슬라이드한 경우에 제1 결합부(27A)에 결합하는 제2 결합부(28A) 및 고형제제를 통과시키기 위한 개방부(28B)를 갖는 제2 구획판(28)을 구비하는 것을 특징으로 한다.
Patent KR-20020094273-A (KR)
Title: Bearing assembly structure for cooling fan
Inventor: JUNG CHI WON
IPC: H02K5/16
Filed: 2001-06-08
Abstract: PURPOSE: A bearing mounting structure for an electrical cooling fan is provided to reduce noise by preventing vibration during the rotation of the motor, while lengthening lifespan of the bearing by preventing damage of the bearing. CONSTITUTION: A cooling fan is mounted to a driving shaft(32) protruded from a motor housing(31), and a bearing(34) for supporting the driving shaft is mounted to a shaft hole(33) of the motor housing by a cap-shaped retainer(35). The motor housing is partially cut so as to form a coupling piece(40) for fixing a left surface(36) of the retainer to the motor housing. The coupling piece is bent inward in such a manner that an end of the coupling piece covers the left surface of the retainer, to thereby firmly fix the retainer.
Patent KR-20010074624-A (KR)
Inventor: OH SUN HONG
IPC: G06Q50/00
Filed: 2001-06-30
Abstract: PURPOSE: A system and method for the e-commerce using bar codes and mobile phones are provided to connect to contents of a desired company through the internet by bar code information downloaded in the mobile phone so as to activate the e-commerce. CONSTITUTION: A user accesses a main server by using a mobile phone or a PC(S10) and takes member authentication(S12). If the user inputs the personal information(S14), the main server authenticates the information according to predetermined rules and then transfers a personal bar code to the mobile phone(S16). The user checks the transferred bar code information(S18) and accesses a desired internet site without the extra input by a bar code recognition program of the main server(S20,S22). The user uses various contents of a membership company and pays for a product easily by the personal bar code information(S24,S26).
Patent KR-20020017943-A (KR)
Inventor: ARAI KAZUHISA
IPC: B24B7/22
Filed: 2001-07-03
Abstract: PURPOSE: A semiconductor wafer grinding method is provided to be capable of smoothly transferring a ground semiconductor wafer without deteriorating its finished grinding accuracy. CONSTITUTION: A grinding device is equipped with a chuck table that holds a semiconductor wafer(W), and a polishing member that grinds the top surface of the semiconductor wafer(W). The semiconductor wafer grinding method carried out by the use of the above grinding device includes a tray holding process of holding the ground semiconductor wafer unloaded from the chuck table after grinding in a wafer holding tray(40).
Patent KR-20030006200-A (KR)
Title: Method for manufacturing firewood using sludge of paper mill
Inventor: LEE JAE CHUN
IPC: C10L5/48
Filed: 2001-07-12
Abstract: PURPOSE: A method for manufacturing a solid fuel using paper mill sludge is provided to increase industrial utilization rate of wastes by crushing the carbonized sludge into a sawdust shape after carbonizing the surface of sludge of the paper mill sorted and dried so that the sawdust shaped sludge can be industrially utilized as a solid fuel. CONSTITUTION: The method for manufacturing a solid fuel using paper mill sludge comprises raw material preparation step(1) of preparing raw material by pressing the sludge discharged from the paper mill to a certain size so that the sludge is formed in a lump having moisture content of 15 to 20%; sorting step(2) of sorting the dismantled sludge to remove foreign materials after transporting the lump to a works and dismantling the lump; drying step(3) of injecting the sorted sludge into a dryer to remove water content; carbonization step(4) of injecting the dried sludge into a rotary carbonizer which supplies hot air of 280 to 300 deg.C to a supply pipe so that the surface of the sludge is carbonized by rotating the carbonizer; crushing step(5) of crushing the carbonized sludge in a sawdust shape using a crusher; and packing step(6) of packing the crushed sludge as a solid fuel.
Patent KR-20030006554-A (KR)
Title: coupling of pipe using fish farming cages
Inventor: HWANG YOUNG HWAN
IPC: A01K61/00
Filed: 2001-07-13
Abstract: PURPOSE: A pipe coupling member for a fish cage is provided to facilitate the installation of the fish cage and to improve the durability thereof against deformation or breakage. CONSTITUTION: The pipe coupling member(20) for a fish cage comprises an upper housing(21) formed with upper recesses having a shape corresponding to that of the top surfaces of adjacent inner and outer pipes(12,14); a lower housing(31) coupled to the bottom of the upper housing and formed with lower recesses having a shape corresponding to that of the bottom surface of the adjacent inner and outer pipes; and heating meshes for heating and fusing the contact surfaces of the pipes coming into close contact with the upper and lower recesses in accordance with the supply of electric power.
Patent KR-20030008621-A (KR)
Title: Method for manufacturing thin strips of jelly for snack
Inventor: LEE CHOONG SUB
IPC: A23L25/00
Filed: 2001-07-19
Abstract: PURPOSE: Provided is a method of preparing jelly by cutting conventional jelly(muk, Korean native name) into thin lengthwide strips and vacuum-packing the cut strips with seasoning soup and seasoned soy product(yangnyumjang). Therefore, it is convenient for a user to eat without cooking. CONSTITUTION: Starch is heated with an appropriate amount of salts for a specified time to produce jelly. The produced jelly is cut into a thin strip having a thickness of 2 to 8 mm and a length of 5 to 20 cm, soaked in cold water containing 0.1 to 0.5% by weight of calcium gluconate for 3 to 8min, dried in the atmosphere, sterilized in ozone for 5 to 30sec in the first stage and in hot water at 60 to 90deg.C in the second stage and then packed. The starch is obtained from one selected from the group consisting of acorn, mung beans, Vigna sinensis, Eleocharis kuroguwai, buckwheat, pumpkin, chestnut, arrowroot, lotus root and cactus.
Patent KR-20030009928-A (KR)
Title: System for protectting of computer use of bluetooth
Inventor: LEE UI DONG
IPC: G06F11/00
Filed: 2001-07-24
Abstract: PURPOSE: A computer security system using a bluetooth is provided to make a bluetooth receiving module provided in a computer receive a predetermined control signal from a wireless transmission device of a user and make a security system of the computer be released when the user who possesses a wireless transmission device having a bluetooth accesses to the computer by embodying a security program which uses a bluetooth in the computer. CONSTITUTION: An input unit(110) is provided for receiving a predetermined control signal from a user. A central processing unit(120) performs the received control signal. An output unit(140) outputs predetermined data received from the central processing unit(120). A bluetooth receiving module(150) comprises an RF receiving unit(150b) for receiving a security releasing signal from a wireless transmitting/receiving device for a local area wireless communication and a base band processing unit(150a) for converting a received data packet into an HCI(Host Control Interface) packet. A communication control unit(210) generates a security releasing signal within a predetermined distance to the computer(100). A bluetooth transmitting module(220) comprises a base band processing unit(220b) for converting the security releasing signal received from the communication control unit(210) into a data packet for a wireless communication and an RF transmitting unit(220a) for transmitting the data packet received from the base band processing unit(220b) to the computer(100).
Patent KR-20020010519-A (KR)
Inventor: KWOK KWONG HENG
IPC: G11B15/18
Filed: 2001-07-26
Abstract: PURPOSE: Process for controlling a capstan in a video tape recorder(VTR) is provided to have an effects on a slow-motion reproduction or still-picture reproduction by controlling a capstan. CONSTITUTION: Process for controlling a capstan(10) in a video tape recorder(2) so that a capstan(10) is rotated by a motor in a forward direction to draw a tape(6) from which a video signal is reproduced, comprises the steps of: applying a torque to the capstan in a backward direction for a first period of time; applying a torque to the capstan in the forward direction for a second period of time; and nullifying the motor current.
Patent KR-20020010099-A (KR)
Title: Magnetic toner
Inventor: CHIBA TATSUHIKO
IPC: G03G9/08
Filed: 2001-07-27
Abstract: PURPOSE: Provided is a magnetic toner which gives an image of excellent quality, and shows static charge property without being influenced by environments. CONSTITUTION: The magnetic toner is composed of at least binding resin, magnetic toner particles containing iron oxide and a polymer incorporating sulfur atom, inorganic fine powders mixed with the above magnetic toner particles. It is characterized by that: (i) its weight average particle size(D4) is 3 to 10 μm; (ii) its average circularity is beyond 0.970; and (iii) its strength of magnetization in the magnetic field 79.6 kA/m(1,000 ersteds) is 10 to 50 Am2/kg(emu/g).
Patent KR-20030016828-A (KR)
Title: Folding arm rest for vehicles
Inventor: KIM SANG HO
IPC: B60N2/75
Filed: 2001-08-22
Abstract: PURPOSE: A foldable arm rest of a vehicle is provided to easily put beverage in a cup holder, to improve passenger's convenience by automatically rotating the arm rest with an elastic body and to enhance passenger's safety by preventing the arm rest from being pushed forwardly through a lock. CONSTITUTION: In a foldable arm rest, a fixing portion(100) is coupled on the side face of a seat back and prepared with a fixing groove(110) and a guide hole. A lock(200) is inserted in the fixing groove and formed with a lock pin(210). A rotating portion is positioned inside the arm rest and made up of a lock guide bed(320) and an elastic body fixing link(330). The lock guide bed is coupled with the seat back by a hinge and formed with a stop protrusion(310) to be rotatable from the fixing portion. An elastic body fixing hole(410) and a lock cam(420) are prepared on the middle bed of a control unit(400). A lock guide hole is formed on one side of the lock control unit to move the lock within the lock guide bed and a lock handle is coupled on the other side. One side of an elastic body(500) is connected with the elastic body fixing link and the other side is coupled in the elastic body fixing hole. One side of a spiral elastic body(800) contacts the elastic body fixing protrusion and the central part is coupled with the fixing portion to rotate the rotation portion.
Patent KR-20030018513-A (KR)
Title: A new way of teaching english by teaching how to picture a scene
Inventor: AHN JEONG BONG
IPC: G09B19/06
Filed: 2001-08-30
Abstract: PURPOSE: English teaching method using a picture manufacture is provided, which a user learn english by arranging a corresponding picture to a user thinking. CONSTITUTION: Before a learner speaks English, the learner thinks whether a thinking of the English is expressed as any picture in the learner' head or a picture and is well acquainted with an order of the picture. A teacher trains the learner to understand that the picture corresponds to an expression of the English. In order to express a sentence of complicated contents, main contents among contents to be conveyed is conveyed at first. Additional contents follows it. According to a human's natural thinking flow, English words are arranged suitable to a connecting order of a picture to make an excellent English expression.
Patent KR-20030020130-A (KR)
Title: Holding apparatus of elevator in semiconductor production device
Inventor: HA YEONG JIN
IPC: H01L21/68
Filed: 2001-09-03
Abstract: PURPOSE: A wafer holding apparatus of an elevator in semiconductor fabrication equipment is provided to prevent a broken phenomenon of a wafer guide in a wafer unloading process by forming the wafer guide with a ceramic material. CONSTITUTION: An elevator is used for shifting a wafer to an upper side or a lower side in a wafer loading process and a wafer unloading process. An elevator platform(20) is fixed to a shaft of the elevator. The elevator platform(20) has a circular shape. A plurality of wafer guide couples(22) are formed in a predetermined interval along a circumference on the elevator platform(20) of the elevator. The wafer guide couples(22) have flat planes(24) for loading the wafer, respectively. The wafer guide couples(22) are formed with a ceramic material.
Patent KR-20030020765-A (KR)
Title: Overflow-device for washing machine having drying function
Inventor: CHOI MU YONG
IPC: D06F25/00
Filed: 2001-09-04
Abstract: PURPOSE: An overflow device of a drying and washing machine is provided to effectively discharge overflowing water or humidified air from an outer tub, thereby improving the performance of the machine. CONSTITUTION: An overflow device of a drying and washing machine includes a circulating duct mounted with a blower fan and a heater for supplying heated air into an inner tub, an annular sump tube(41) mounted to a bottom surface of an outer tub(3), and at least two or more overflow tubes(42), each of which an end is connected to an upper part of the outer tub and the other end is connected to the sump tube. The overflow tubes guide water overflowing from the outer tub to the sump tube while washing, and guiding humidified air of the outer tub to the sump tube while drying. A discharge tube(43) is connected to the sump tube for discharging the water or air collected in the sump tube to the outside.
Patent KR-20010099167-A (KR)
Title: 도토리로부터 전분 분리방법
Inventor: CHOI HONG SEOK
IPC: A23L1/0522
Filed: 2001-09-07
Abstract: 본 발명은 껍질이 제거된 말린 생 도토리로부터 전분을 추출하기 위한 방법에 관한 것으로, 도토리를 물에 불리지 않은 상태에서 도토리를 전분 입자 크기에 최대한 가깝운 정도의 크기까지 커팅식으로 잘게 분쇄하여 분쇄물로부터 전분을 얻을 수 있도록 한 것이다. 
     이를 위해, 건조된 도토리에 묻어 있던 불순물을 제거하는 단계와, 이물질이 제거된 도토리를 커팅밀(12)의 회전에 따라 소정의 입도로 분쇄하는 단계와, 커팅밀에 의해 잘게 분쇄된 도토리분을 탱크(13)내에 물과 함께 투입하여 임펠러(14)(15)의 회전으로 회전시키면서 전분의 둘레를 싸고 있던 비전분을 떼어내어 현탁액을 얻는 단계와, 현탁액을 소정의 입도를 갖는 여과기(16)내의 필터(18)를 압력에 의해 통과시켜 찌꺼기를 제거하는 단계와, 원심분리기(20)를 이용하여 현탁액으로부터 비전분을 분리하는 단계와, 탈수기(22)를 이용하여 전분만이 포함된 현탁액을 탈수하여 전분을 얻는 단계와, 젖은 모래상태 정도의 수분을 함유한 전분을 건조하여 포장하는 단계로 이루어진 것이다.
Patent KR-20010099228-A (KR)
Title: 햇빛을 차단시키고 진공상태에서 회전 장치를 이용한과일주의 제조기술
Inventor: OH SUNG KEUN
IPC: C12G3/02
Filed: 2001-09-13
Abstract: 본 발명은 햇빛을 완전히 차단시키고, 진공상태에서, 회전장치를 이용해서 과일즙을 회전시켜 발효를 촉진 ·강화시켜 과일주를 생산하는 기술이다. 본 기술의 특징을 요약해 보면, 첫째는 햇빛을 완전히 차단하고, 적당하고 일정한 온도와 습도를 유지시킬 수 있는 건축물을 설치한다. 과일주를 제조하는데 있어서 햇빛은 치명적인 해를 끼치기 때문에 완전히 차단할 수 있어야 한다. 이를 위해서 건축물을 지하에 건설해야 한다. 지하 건축은 과일주에 치명적인 햇빛를 차단할 수 있으며, 저렴한 비용으로 온도와 습도를 일정하게 유지하는데 매우 유리하기 때문이다. 온도는 20∼26도로 일정하게 유지시키고, 습도는 75∼85% 정도로 유지시킬 수 있어야 한다. 둘째는 과일주는 산소와 결합하면 산화작용을 일으키기 때문에 과일을 발효시키거나 숙성을 시키는 동안에 밖의 공기는 차단시키고, 발효통 안에서 생긴 가스는 밖으로 내보내는 장치를 이용해 진공상태에서 발효시켜야 한다. 셋째는 발효를 촉진시켜주는 회전장치를 설치하는 것이다. 과일과 발효제 및 당류가 잘 혼합되도록 하고, 발효를 촉진시켜 주기 위해서 흔들어 주거나 저어 준다. 회전장치는 발효 시간을 단축시켜줄 수 있기 때문에 대량으로 생산하고 경제성이 뛰어나다 할 것이다. 넷째는 발효와 숙성이 잘 되도록 발효통과 숙성통을 옹기와 참나무통을 이용하는 것이다. 특히 발효통과 숙성통을 참나무를 이용했을 때에 일정한 온도와 습도를 유지시키는데 유리했고, 오랫동안 숙성시키고 저장을 하면 향과 맛을 극대화시키고 순도가 높은 고급 과일주를 생산할 수 있고, 인체에 유해한 물질이 생성되는것을 방지할 수 있다. 그리고 오래 숙성을 잘 시키면 통에서 우러나오는 여러 가지 맛과 향이 나는 과일주를 생산할 수 있다. 예를 들면 단맛이 은은하게 울어 나오든지 아니면 넣지 않은 바닐라 향이나 계피향 등이 나오게 된다. 
     회전장치를 설치하고, 햇빛을 완전히 차단시키고, 진공상태에서, 일정한 온도와 습도를 유지해서 발효를 시키면 빠른 시간 안에 질 좋은 과일주를 대량으로 생산할 수 있고, 이러한 조건에서 발효시킨 과일주는 맛과 향, 순도와 높은 농도 그리고 과일주의 빛깔의 선명도와 신선도를 높일 수 있다. 
     이러한 설비와 여건이 마련된 상태에서 과일주 제조과정을 요약하면, 과일을 파쇄하고 파쇄된 과일즙 20리터 당 효소는 5∼40그램, 자양염을 2∼40그램을 넣고, 설탕을 첨가해서 당도를 26∼40도로 맞추어서 1차 발효에 들어간다. 1차 발효에서 처음14일 동안은 하루에 5분씩 10회를 흔들어 주어서 설탕과 효소가 잘 섞여 발효가 잘 되도록 한다. 14일 후에는 하루에 10분씩 5회를 흔들어 주면서 약 1개월 정도 발효시킨다. 2차 발효를 위해서 씨와 껍질을 제거하고 당도를 15∼35도로 맞추어서 약 3개월 이상 발효시킨다. 이 때에도 처음 30일 동안은 하루에 10분씩 10회를 흔들어주고, 그 이후에는 하루에 10분씩 5회를 흔들어 준다 2차 발효까지 끝난 후에는 참나무 통에 넣어서 6개월 이상 숙성시킨다. 숙성을 위해서 참나무 통을 사용하면 과일의 고유한 향과 참나무 향이 결합하여 특이한 향이 나는 11%에서 최고 16%의 농도를 가진 과일주를 생산할 수 있다.
Patent KR-20010099344-A (KR)
Title: 전열매트에 가상 접지점이 형성되는 자동접지 선별 조절기
Inventor: KIM DONG YOUL
IPC: H05B3/20
Filed: 2001-09-21
Abstract: 본 발명은 마이콤을 이용한 전열매트에 가상 접지점이 형성되는 자동접지 선별 조절기에 관한 것으로서, 별도의 접지선 없이 2선의 인입선중 접지와 같은 전위의 선을 전자장치를 이용하여 자동적으로 선별하고, 접지와 같은 전위선이 없을 시 회로상에 가상접지점을 형성하여 매트 본체 파폐판에 연결하므로서 전열매트에서 발생되는 전위 및 전자파가 인체에 유도되지 않도록 구성된 자동접지 선별 조절기에 관한 것이다.
Patent KR-20030025681-A (KR)
Inventor: KWON YOUNG ME
IPC: G06Q50/02
Filed: 2001-09-22
Abstract: PURPOSE: A method for managing a cyber farm is provided to intermediate a farm and a farmer adapted to a condition requested by a farm hirer and enable a farmer to execute a cultivation on commission while the farm hirer does not cultivate a farm product in a hired farm using an information communication network. CONSTITUTION: A farmer and a farm hirer connect to an operator server using a computer and transmit basic information through an information communication network. A CPU receives and stores the information in a member DB of a data storage(S2). The farmer transmits information with respect to a location of a farm, a hire available size, a hire available time, and farm products through the information communication network. The CPU receives and stores the information in a farm hiring DB of the data storage(S4). If farm hirer information with respect to a location of a farm, a hire available size, a hire available time, and farm products, the CPU receives the information, searches a proper farm, stores farm information adapted thereto in a farm rent DB, and transmits the farm information to the computer of the farmer(S6). If a cultivation is completed, the farm hirer transmits information with respect to a process of a product to be harvested. The CPU receives and stores the information in a produce harvest DB of the data storage, and transmits the information to the computer of the farmer(S8).
Patent KR-20030027445-A (KR)
Inventor: CHO SEONG MIN
IPC: H01L21/768
Filed: 2001-09-28
Abstract: PURPOSE: A method for forming Cu interconnection of a semiconductor device using electroless plating is provided to simplify a fabrication process by replacing a pretreatment process using vacuum equipment by a wet process, and to omit a wafer planarization process by selectively growing copper only in an interconnection. CONSTITUTION: A cleaning process is performed to eliminate contaminant and uniformly deposit copper. A pretreatment process using metal catalyst is performed to have a tendency to spontaneous catalyst activation in an area where the copper is deposited while a process temperature is varied to grow a catalyst grain by using a metal catalyst pretreatment solution having different bonding force and size on a wafer and an interconnection formation region. A cleaning process is performed to eliminate the metal catalyst from the surface of the wafer. Copper is grown in a region of the resultant structure where the metal catalyst is formed by a copper electroless plating solution.
Patent KR-20030029760-A (KR)
Title: Reflective type ferroelectric liquid crystal display
Inventor: WANG JONG MIN
IPC: G02F1/1335
Filed: 2001-10-10
Abstract: PURPOSE: A reflective ferroelectric liquid crystal display device and a method for driving the same are provided to restrain the loss in light transmission and expand a gray scale display range. CONSTITUTION: A compensating panel(10) and a display panel(30) are installed between a polarizing beam splitter(60) and a mirror(50). The compensating panel is composed of a lower substrate, a lower electrode layer, a lower alignment layer, a liquid crystal layer, an upper alignment film, an upper electrode layer, an upper substrate, a sealing member, and spacers. A half-V type ferroelectric liquid crystal having a bookshelf structure is filled in the liquid crystal layer.
Patent KR-20020030026-A (KR)
Title: Sheet treating apparatus, method of mounting sheet treating apparatus, and image forming apparatus
Inventor: KAMIYA DAISAKU
IPC: G03G15/00
Filed: 2001-10-16
Abstract: PURPOSE: A sheet treating apparatus, a method of mounting sheet treating apparatus, and an image forming apparatus, are provided to easily and precisely mount the sheet treating apparatus in a sheet delivery space in the image forming apparatus, and to increase the number of sheets capable of being accumulated in a sheet delivery unit. CONSTITUTION: A sheet treating apparatus is mountable in a space portion of an image forming apparatus(100) including an image-forming portion(1) for forming an image on a sheet and an image-reading portion(3) for reading an image of an original. The image-reading portion is disposed above the image-forming portion. The sheet is delivered in the space portion formed between the image-forming portion and the image-reading portion. In the sheet treating apparatus, a connection path unit is connected with a sheet delivery path for delivering the sheet from the image-forming portion, and is mounted in the space portion from the outside of a side surface of a main body(101) of the image forming apparatus. And a sheet-treating unit(200) mounted in the space portion from the front side of the main body of the image forming apparatus performs a treatment of the sheet transported from the connection path unit.
Patent KR-20020031086-A (KR)
Inventor: ASAKURA MAKOTO
IPC: C09D163/00
Filed: 2001-10-20
Abstract: PURPOSE: Provided is a water based coating composition capable of forming a coating film not eluting bisphenol A therefrom without reducing coating film performances demanded on the coating film applied onto the internal surface of the can, for example, coating workability, adhesion properties, retorting resistant properties, mar resistance properties, hygienical properties, flavor properties and the like. CONSTITUTION: The water based coating composition is prepared by reacting an epoxy resin(A) having a bisphenol A skeletal structure and a carboxyl group-containing acrylic resin(B) in the presence of an amine compound to form an acrylic-modified epoxy resin(C);, and neutralizing and dispersing the acrylic-modified epoxy resin(C) into an aqueous medium. An amount of a quaternary ammonium salt in the acrylic-modified epoxy resin (C) is in the range of 3.0x10¬-4 mol or less per one gram of the resin. The epoxy resin(A) is a bisphenol based epoxy resin having a number average molecular weight in the range of 4,000 to 30,000, and an epoxy equivalent in the range of 2,000 to 10,000.