US20070131639A1 - Sealed container and manufacturing method thereof - Google Patents

Sealed container and manufacturing method thereof Download PDF

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Publication number
US20070131639A1
US20070131639A1 US10/598,534 US59853405A US2007131639A1 US 20070131639 A1 US20070131639 A1 US 20070131639A1 US 59853405 A US59853405 A US 59853405A US 2007131639 A1 US2007131639 A1 US 2007131639A1
Authority
US
United States
Prior art keywords
opening
wall surface
container
lid portion
laser
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US10/598,534
Other languages
English (en)
Inventor
Masaki Nakaya
Akira Shirakura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kirin Brewery Co Ltd
Original Assignee
Kirin Brewery Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kirin Brewery Co Ltd filed Critical Kirin Brewery Co Ltd
Assigned to KIRIN BREWERY COMPANY, LIMITED reassignment KIRIN BREWERY COMPANY, LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: NAKAYA, MASAKI, SHIRAKURA, AKIRA
Publication of US20070131639A1 publication Critical patent/US20070131639A1/en
Assigned to KIRIN HOLDINGS KABUSHIKI KAISHA reassignment KIRIN HOLDINGS KABUSHIKI KAISHA CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: KIRIN BEER KABUSHIKI KAISHA
Assigned to KIRIN BEER KABUSHIKI KAISHA reassignment KIRIN BEER KABUSHIKI KAISHA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KIRIN HOLDINGS KABUSHIKI KAISHA
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/65—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles with a relative motion between the article and the welding tool
    • B29C66/652—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles with a relative motion between the article and the welding tool moving the welding tool around the fixed article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D11/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of plastics material
    • B65D11/02—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of plastics material of curved cross-section
    • B65D11/06—Drums or barrels
    • B65D11/08—Arrangements of filling or discharging apertures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1635—Laser beams characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. laser transmission welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1654—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1677—Laser beams making use of an absorber or impact modifier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/76—Making non-permanent or releasable joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/23—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations
    • B29C66/232—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations said joint lines being multiple and parallel, i.e. the joint being formed by several parallel joint lines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/301—Three-dimensional joints, i.e. the joined area being substantially non-flat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/542—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining hollow covers or hollow bottoms to open ends of container bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/65—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles with a relative motion between the article and the welding tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7234—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a barrier layer
    • B29C66/72343—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a barrier layer for liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/16—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons
    • B65B7/28—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by applying separate preformed closures, e.g. lids, covers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/16—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons
    • B65B7/28—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by applying separate preformed closures, e.g. lids, covers
    • B65B7/2842—Securing closures on containers
    • B65B7/2878—Securing closures on containers by heat-sealing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D53/00—Sealing or packing elements; Sealings formed by liquid or plastics material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1603—Laser beams characterised by the type of electromagnetic radiation
    • B29C65/1612—Infrared [IR] radiation, e.g. by infrared lasers
    • B29C65/1619—Mid infrared radiation [MIR], e.g. by CO or CO2 lasers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1654—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined
    • B29C65/1661—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined scanning repeatedly, e.g. quasi-simultaneous laser welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1664—Laser beams characterised by the way of heating the interface making use of several radiators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1677—Laser beams making use of an absorber or impact modifier
    • B29C65/1683—Laser beams making use of an absorber or impact modifier coated on the article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5346—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat
    • B29C66/53461—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat joining substantially flat covers and/or substantially flat bottoms to open ends of container bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72322—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of elements other than metals, e.g. boron
    • B29C66/72323—Carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72324—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of inorganic materials not provided for in B29C66/72321 - B29C66/72322
    • B29C66/72325—Ceramics
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
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    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/843—Machines for making separate joints at the same time in different planes; Machines for making separate joints at the same time mounted in parallel or in series
    • B29C66/8432—Machines for making separate joints at the same time mounted in parallel or in series
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91211—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods
    • B29C66/91216—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods enabling contactless temperature measurements, e.g. using a pyrometer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91221—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9131—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the heat or the thermal flux, i.e. the heat flux
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/93—Measuring or controlling the joining process by measuring or controlling the speed
    • B29C66/934—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/93—Measuring or controlling the joining process by measuring or controlling the speed
    • B29C66/939—Measuring or controlling the joining process by measuring or controlling the speed characterised by specific speed values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
    • B29K2995/0026—Transparent
    • B29K2995/0027—Transparent for light outside the visible spectrum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7158—Bottles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00425—Lids or covers welded or adhered to the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00824—Means for facilitating removing of the closure
    • B65D2543/00833—Integral tabs, tongues, handles or similar
    • B65D2543/00842—Integral tabs, tongues, handles or similar outside of the lid
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/80—Packaging reuse or recycling, e.g. of multilayer packaging

Definitions

  • the present invention is related to a sealed container in which contents such as foods and beverages and the like can be sealed with good sealing performance and there is little dripping of liquid at a mouth portion having a good touch sensation, and in particular to a sealed container having a welded portion that was laser welded and a manufacturing method thereof.
  • a sealed container for example, as for a beverage container, various containers such as bottles, cans, plastic containers and the like are known.
  • cans and plastic containers have been widely used from the viewpoint of convenience such as the quality of the handling performance thereof and the like.
  • cans are in wide circulation because the container cost is low, the industrial speed is fast, the transportation efficiency is high and the like.
  • These cans are usually formed from a cylindrical “body portion” which includes a bottom and a “lid” which covers the opening of the body portion. The body portion and the lid portion are adequately connected, and from the need to seal contents such as foods and beverages and the like, the cans are made from metal such as aluminum or steel or the like.
  • connection of the body portion and the lid portion is carried out by overlapping an end portion of the body portion and an end portion of the lid portion to form a flange structure which is then mechanically overlapped by seaming.
  • the lid portion is generally formed from a thicker member than the body portion, and is provided with a polymer material such as styrene-butadiene rubber or polyvinyl chloride or the like for content sealing. For this reason, a polymer material is required, and the use amount of metal material becomes large.
  • plastic beverage containers it is difficult to carry out the seaming process, and plastic can containers for beverages are not distributed.
  • plastic beverage containers the most distributed containers are PET (polyethylene terephthalate) bottles.
  • PET bottles a method in which a cap is screwed on a bottle mouth portion is used as a sealing method.
  • this cap forms a main cause of large cost increases in the whole container.
  • the cap is mainly made of PP (polypropylene), it becomes a hindrance to recycling.
  • Patent Document 1 Publication No. W002/42196 A2
  • Patent Document 2 Japanese Laid-Open Patent Publication No. SHO 63-194885
  • Patent Document 3 Japanese Laid-Open Patent Publication No. SHO 61-289932
  • the use of a polymer material and the excessive use of a can material at the seaming portion are required and form a main cause of cost increases.
  • the laser-welded can container including Patent Document 1 an examination was carried out for the purpose of reducing the use amount of materials and making polymer materials unnecessary, and even though laser welding was tested in place of prior art seaming, this has not been put to practical use because it could not surpass the seaming method.
  • the sealed container is a plastic container, it is an object to improve the filling speed and transportation efficiency and improve the recyclability of the container compared to prior art PET bottles.
  • the plastic container has translucency, the sealed container, as is different from a metal can, is designed to make the contents visible.
  • the sealed container according to the present invention is a sealed container in which a container body having an opening is sealed by a lid portion which closes and covers said opening, and includes a welded portion in which an outer wall surface of a peripheral portion of said opening and an inner wall surface of said lid portion are laser welded in order to make it possible for at least an inner wall surface of the peripheral portion of said opening from an inner wall surface of said container body to make contact with container contents.
  • a sealed container of another embodiment of the present invention is a sealed container in which a container body having an opening is sealed by a lid portion which closes and covers said opening, and includes a welded portion in which an edge surface of said opening and an inner wall surface of said lid portion are laser welded in order to make it possible for at least an inner wall surface of the peripheral portion of said opening from an inner wall surface of said container body to make contact with container contents.
  • said welded portion does not form a flange is included.
  • the sealed container according to the present invention also includes the case where a non-welded portion in which an inner wall surface of a peripheral portion of said lid portion is not welded to an outer wall surface of said container body is provided.
  • the non-welded portion forms a finger catching portion or a tab, and this improves the lid opening capability.
  • the sealed container according to the present invention also includes the case where said lid portion has a thickness of 0.2 mm or higher.
  • the thickness of the lid portion is made 0.2 mm or higher to impart rigidity, it can be used as a sealed container without bursting even in the case where internal pressure is applied to the container such as by filling with a carbonated beverage or the like.
  • the laser welding process can carry out welding even when the thickness of the lid portion is made 0.2 mm or higher, and this is different from a heat sealing process.
  • the sealed container according to the present invention includes the case where said welded portion is laser welded in two or more loop shapes along the periphery of said opening.
  • said welded portion the entire surfaces of the connected surfaces may be welded, but by carrying out laser welding in two or more loop shapes, the connection strength, the sealing performance and the easy lid opening capability can be secured with good balance.
  • the sealed container according to the present invention includes the case where said lid portion has a multilayer structure in which an annular layer having an inner diameter roughly the same as the opening diameter of said opening is connected to the inner wall surface side, and the container seal is opened by peeling apart said lid portion from said annular layer in the state where said annular layer remains laser welded to said container body.
  • said container body and said lid portion are preferably formed from synthetic resin.
  • the filling speed, transportation efficiency and the recyclability of the container are improved. Furthermore, the container contents are visible.
  • the sealed container according to the present invention includes the case where said container is a beverage container.
  • the method of manufacturing a sealed container according to the present invention is a method of manufacturing a sealed container in which a container body having an opening is sealed by a lid portion which closes and covers said opening, and includes a process in which after forming bonded surfaces by bonding an outer wall surface of a peripheral portion of said opening and an inner wall surface of said lid portion in order to make it possible for at least an inner wall surface of the peripheral portion of said opening from an inner wall surface of said container body to make contact with container contents, said bonded surfaces are irradiated with a laser to form a welded portion.
  • the method of manufacturing a sealed container of another embodiment according to the present invention is a method of manufacturing a sealed container in which a container body having an opening is sealed by a lid portion which closes and covers said opening, and includes a process in which after forming bonded surfaces by bonding an edge surface of said opening and an inner wall surface of said lid portion in order to make it possible for at least an inner wall surface of the peripheral portion of said opening from an inner wall surface of said container body to make contact with container contents, said bonded surfaces are irradiated with a laser to form a welded portion.
  • connecting is very easy because it can be carried out just by irradiating the connected surfaces with the laser, and there is no formation of a flange at the welded portion which is the connection place.
  • the method of manufacturing a sealed container according to the present invention preferably includes a process which provides a laser light absorbing portion in at least one of an outer wall surface of the peripheral portion of said opening or an inner wall surface of said lid portion, or in at least one of an edge surface of said opening or an inner wall surface of said lid portion.
  • This is preferred in the case of laser welding transparent plastic which does not absorb laser light, or in the case of laser welding plastic which is not transparent plastic but does not have an absorption band for the wavelength of the laser light.
  • the laser has characteristics which make it possible to irradiate only a fine area. By providing an absorption portion in the connected portion, it is possible to act the laser only in such portion.
  • fusion can be carried out by noncontact easily with good precision even if there are contours or undulations which make mechanical contact complicated, whereby sealing is possible, and this is different from seaming and heat sealing.
  • the method of manufacturing a sealed container according to the present invention preferably includes a case which provides a laser light absorbing material in a portion of at least one of an outer wall surface of the peripheral portion of said opening or an inner wall surface of said lid portion, or in a portion of at least one of an end portion of said opening or an inner wall surface of said lid portion.
  • the laser can be acted in the place provided with the absorption material in the same way as for the absorption portion described above. Accordingly, by suitably moving the irradiation position of the laser, fusion can be carried out by noncontact easily with good precision even if there are contours or undulations which make mechanical contact complicated, whereby sealing is possible, and this is different from seaming and heat sealing.
  • laser irradiation to said welded portion is preferably carried out by fixing a laser oscillating element while said container body and said lid portion are rotated around a rotation axis formed by the central axis of the container, or carried out by rotating the laser oscillating element around said container body and said lid portion around a rotation axis formed by the central axis of the container. It is possible to carry out laser welding with good precision.
  • the sealed container of the present invention because the welded portion that was laser welded does not form a flange, there are no uneven shapes, the touch sensation of the mouth portion is good, and liquid dripping rarely occurs. This is achieved even without the use of polymer materials and excessive material of a flange portion which were required in metal cans. Further, the lid portion can be miniaturized. Furthermore, when the sealed container is a plastic container, because it does not require a screw-in type lid, the filling speed and transportation efficiency can be improved, and the recyclability of the container can be improved because the container body and the lid portion can be made of the same raw material. At this time, because it has translucency, the container contents become visible in the same way as a glass bottle. Further, in accordance with the method of manufacturing a sealed container of the present invention, connecting is very easy because it can be carried out just by irradiating the connected surfaces with the laser, and there is no formation of a flange at the connection place.
  • FIG. 1 shows partial vertical cross-sectional schematic drawings of a sealed container according to the present embodiments, wherein (a) is a first embodiment, (b) is a second embodiment, and (c) is a third embodiment.
  • FIG. 2 shows a partial vertical cross-sectional schematic drawing of a fourth embodiment of a sealed container according to the present embodiments.
  • FIG. 3 shows partial vertical cross-sectional schematic drawings of a fifth embodiment of a sealed container according to the present embodiments, wherein (a) and (b) show the sealed container at the sealing time, and (c) shows sealed container at the lid opening time.
  • FIG. 4 is a schematic process drawing (first manufacturing embodiment) showing various manufacturing processes for the sealed container according to the present embodiments.
  • FIG. 5 is a schematic process drawing (second manufacturing embodiment) showing various manufacturing processes for the sealed container according to the present embodiments.
  • a sealed container 100 according to the first embodiment is a sealed container in which a container body 1 having an opening 9 is sealed by a lid portion 3 which closes and covers the opening 9 , and includes a welded portion 4 in which an outer wall surface of a peripheral portion 2 of the opening 9 and an inner wall surface of the lid portion 3 are laser welded in order to make it possible for at least an inner wall surface 6 of the peripheral portion of the opening 9 from the inner wall surface of the container body 1 to make contact with the container contents.
  • a sealed container 200 according to the second embodiment is a sealed container in which a container body 11 having an opening 19 is sealed by a lid portion 13 which closes and covers the opening 19 , and includes a welded portion 14 in which an edge surface of the opening 9 and an inner wall surface of the lid portion 13 are laser welded in order to make it possible for at least an inner wall surface 16 of the peripheral portion of the opening 19 from the inner wall surface of the container body 11 to make contact with the container contents.
  • the sealed container of the first embodiment and the sealed container of the second embodiment have the same structure with the exception that the laser welding places in the container bodies are different.
  • the sealed container of the first embodiment because a large surface area of the welded portion 4 is obtained, the pressure resistance strength can be made large.
  • the container bodies 1 , 11 and the lid portions 3 , 13 may be formed from any raw material so long as it is a raw material in which laser welding is possible, but restrictions which also depend on the container contents are applied. For example, if it is a beverage container, from the viewpoint of quality preservation of the contents, it needs to be inert to the container contents. Furthermore, it is preferably provided with a gas barrier property for oxygen and the like. Further, in the case of filling a carbonated beverage, it needs to be formed from a raw material having pressure resistance. From this kind of viewpoint, the container bodies 1 , 11 and the lid portions 3 , 13 are preferably formed from a plastic material or a metal material such as aluminum or steel or the like.
  • the container bodies 1 , 11 and the lid portions 3 , 13 are preferably formed from the same raw material from the viewpoint of recyclability.
  • they are preferably formed from a plastic material, whereby welding is possible without heating to a high temperature by laser welding.
  • the filling speed and transportation efficiency are improved and the recyclability of the container is improved compared to prior art PET bottles.
  • the plastic container has translucency, it is different from a metal can and the contents can be made visible.
  • sealing can be carried out even for shapes that can not be seamed, and it is possible to carry out sealing using a smaller lid than the case where seaming is carried out.
  • PET polyethylene terephthalate
  • PP polypropylene
  • COC cycloolef
  • PET is particularly preferred.
  • the inner surfaces thereof or the outer surfaces thereof or both surfaces thereof may be coated with a gas barrier property thin film such as a DLC (diamond-like carbon) film, a DLC film containing Si, a polymer-like carbon film, a SiOx film or the like.
  • a gas barrier property thin film such as a DLC (diamond-like carbon) film, a DLC film containing Si, a polymer-like carbon film, a SiOx film or the like.
  • the gas barrier property thin film absorbs the laser, the laser light receiving portion generates heat. Accordingly, even when a container is formed from a transparent resin which does not absorb laser light, by forming a gas barrier property thin film, the welding efficiency is good without having to separately provide an absorption portion.
  • the sealed container of the first embodiment and the sealed container of the second embodiment by (1) making it possible for the inner wall surfaces 6 , 16 to make contact with the container contents, and (2) connecting either the outer wall surface of the peripheral portion 2 of the opening 9 or the edge surface 12 of the opening 19 to the inner wall surface of the lid portion 3 , the welded portions 4 , 14 do not form a flange. Further, because the connected portion is formed just by flatly overlapping and welding the container body and the lid portion, the lid portion itself can be miniaturized. Furthermore, in the present invention, the surface which can make contact with the container contents in the lid portion is described as the inner wall surface of the lid portion.
  • the shape of the lid portion and the shape of the container body, in particular the shape of the opening can be suitably changed.
  • the container body 1 has a shape in which the wall thereof is folded toward the inside of the container, and the opening 9 is formed at a position which is lower than the height of the folded portion.
  • the lid portion 3 has a size which at least covers the opening 9 in order to make it possible to seal the opening 9 , and is formed so as to follow the shape of the outer wall surface of the container body 1 surrounding the opening 9 . In this way, bonding surfaces which form the connected portion that forms the welded portion 4 are formed.
  • the outer edge portions of the openings 9 , 19 of the container bodies 1 , 11 are preferably laser welded up to the peripheral portions 2 , 12 in order to prevent retention of the container contents.
  • non-welded portions 5 , 15 in which inner wall surfaces of the peripheral portions of the lid portions 3 , 13 are not welded to the outer wall surfaces of the container bodies 1 , 11 may be included in the sealed container of the first embodiment and the sealed container of the second embodiment.
  • the non-welded portions 5 , 15 form unsealing tabs.
  • the sealed container in addition to the containers of the type where the welded portions 4 , 14 are peeled apart to open the lid, the sealed container according to the present embodiments also includes containers of the type where the welded portions 4 , 14 are not peeled apart, for example, where the seal is broken at a spout provided in the lid portion separate from the openings 9 , 19 by plug opening means such as a pull tag or the like.
  • the lid portions 3 , 13 preferably have a thickness of 0.2 mm or higher, and more preferably 0.3 mm or higher.
  • the container body and the lid portion can be fused and welded by a heat sealing process, without laser welding the welded portions 4 , 14 .
  • the thickness of the lid portions 3 , 13 is 0.2 mm or higher, it becomes difficult to apply the heat sealing process, and if the shapes of the connecting surfaces are complex shapes, the application of the heat sealing process itself is difficult.
  • the laser welding process for raw materials such as plastic and the like which are transparent materials, there is no heating so long as the laser is not absorbed.
  • the thickness of the lid portion 3 , 13 is 0.2 mm or higher.
  • the thickness of the lid portion 3 , 13 is 0.2 mm or higher, because the lid portion itself is imparted with rigidity, the strength of the sealed container, in particular the pressure resistance is improved.
  • the thickness of the container bodies 1 , 11 is preferably made 0.2 mm or higher in order to impart rigidity.
  • FIG. 1 ( c ) a partial vertical cross-sectional schematic drawing of a third embodiment of a sealed container according to the present embodiments is shown in FIG. 1 ( c ).
  • a sealed container 300 according to the third embodiment an end portion of a lid portion 23 is provided with a tab 27 for opening the lid. Because a truncated cone shape is formed from a container body 21 up to an opening 29 , a mouth portion which makes it easy to drink is formed. Further, the lid portion can be miniaturized, and the use amount of lid material can be reduced.
  • FIG. 2 a partial vertical cross-sectional schematic drawing of a fourth embodiment of a sealed container according to the present embodiments is shown in FIG. 2 .
  • a welded portion 34 follows the periphery of an opening 39 , and laser welding is carried out in two loop shapes.
  • the entire surface of the connecting surfaces may be welded, but by carrying out laser welding in two loop shapes, the connection strength and sealing performance are the same as the case of total surface welding, and this makes it possible to open the lid more easily.
  • the welded portion 34 may be laser welded in three or more loop shapes.
  • the container body in order to prevent the lid from opening when the non-welded portions rub during transport, the container body is provided with a shoulder 38 as in the sealed container 400 shown in FIG. 2 to form a structure which guards the non-welded portion 35 .
  • a shoulder 38 when it is difficult for fingers to catch the non-welded portion 35 , a catch portion 37 of the non-welded portion 35 for making it easy for fingers to catch the non-welded portion 35 may be removed from the outer wall surface with the container body 31 .
  • peeling apart is carried out at the connecting surfaces of the container body and the lid portion, or peeling apart is carried out at an inner wall portion of the container body or peeling apart is carried out at an inner wall portion of the lid portion.
  • peeling apart places can be controllably selected because they correspond to places where laser absorbing portions are provided.
  • a peeling apart place forms an end portion of the mouth portion, from the viewpoint of a good touch sensation, preferably peeling apart is carried out at the connecting surfaces of the container body and the lid portion, or peeling apart is carried out at the inner wall surface of the lid portion.
  • FIG. 3 ( a ) is a side view drawing
  • FIG. 3 ( b ) is a partial vertical cross-sectional schematic drawing when FIG. 3 ( a ) is rotated 90°
  • FIG. 3 ( c ) is a partial vertical cross-sectional schematic drawing when the lid is opened.
  • a sealed container 500 according to the fifth embodiment has a multilayer structure in which an annular layer 50 having an inner diameter roughly the same as the opening diameter of an opening 49 is connected to the inner wall surface side of a lid portion 43 .
  • the connecting surfaces of the annular layer 50 and a container body 41 are laser welded to form a welded portion 44 .
  • the container seal is opened by peeling apart the lid portion 43 from the annular layer 50 in the state where the annular layer 50 remains laser welded to the container body 41 .
  • a tab 47 provided on an end portion of the lid portion 43 can be easily caught by fingers, and a shoulder 48 prevents the tab 47 from being caught by rubbing during transport of the container.
  • the sealed container of the fifth embodiment by separating the portion of the lid portion 43 welded to the container body 41 and the portion which is peeled apart when the container is opened, it is possible to impart a high sealing performance and an easy container opening capability at the same time.
  • the welded portion does not form a flange. Further, in the first ⁇ fourth embodiments, the peeling apart of the welded portion to form a mouth portion makes it possible to provide a mouth portion having a good touch sensation. Further, because the container contents do not adhere around a flange, there is little liquid dripping. Furthermore, because the lid portion can be miniaturized, the lid surface area becomes small, and the total pressure (pressure from the inside) applied to the entire lid portion becomes small when filled with contents such as a carbonated beverage or the like, whereby the pressure resistance is improved.
  • step S 1 a container body 61 that was filled with contents is introduced to a laser welding machine by conveying means (not shown in the drawing) such as a conveyor or the like.
  • conveying means not shown in the drawing
  • foam breaking is carried out, and carbon dioxide gas purging or nitrogen gas purging is carried out.
  • a lid portion 62 is conveyed by lid portion conveying means 63 a to lid portion supplying means 63 b .
  • the lid portion supplying means 63 b supplies one lid portion 62 to the opening of one container body 61 .
  • lid portion arranging means 64 aligns the lid portion 62 with the opening of the container body 61 to produce bonding surfaces which will form connecting surfaces, and applies a suitable pressure so that the lid portion 62 and the opening of the container body 61 do not slip out of alignment.
  • the lid portion is pressed above the lid portion by a rod-shaped member.
  • the container body is pressed in indirectly by the pressing of the lid portion.
  • the force pressure of the rod-shaped member is detected by a pressure sensor.
  • the pressure sensor may be a proximity sensor for detecting the lid portion, but in general the sensitivity of a magnetic proximity sensor is not good for plastic. Accordingly, a pressure sensor or a laser displacement gauge is preferred.
  • the detection value of the pressure that presses the lid portion 62 into the opening of the container body 61 detected by a pressure sensor or a laser displacement gauge is preferably incorporated in the lid portion arranging means 64 .
  • step S 4 the container body 61 with the lid 62 kept in alignment is placed on a turntable 69 .
  • Each container body 61 and the lid portion 62 thereof on the turntable 69 are rotated by a rotation table 68 which rotates the container around its own axis.
  • a bonded portion 66 of the container body 61 and the lid portion 62 is irradiated with a laser by laser generating means 65 .
  • Irradiation with the laser can be carried out in a spot shape, a line shape or a ring shape, for example.
  • the laser irradiation shape is suitably selected by the positional relationship between the laser generating means 65 and the bonded portion 66 .
  • the laser intensity is preferably monitored by monitoring the laser output.
  • the spot position of the laser is preferably monitored by monitoring light generation or heat generation by a photosensitive sensor or a temperature sensor such as an infrared sensor or the like.
  • the welding of plastic is preferably monitored by monitoring light generation or heat generation by a photosensitive sensor or a temperature sensor.
  • An imaging sensor such as a CCD or the like may be used at the same time.
  • the laser oscillating element installed in the laser generating means 65 can be a semiconductor laser, a gas laser such as a carbon dioxide laser or the like, or a YAG laser, and said laser oscillating element is suitably selected in accordance with various parameters such as the material of the container body and the lid portion which undergo laser welding the laser irradiation moving speed and the irradiation spot shape and the like.
  • a semiconductor laser e.g., 1 W ⁇ 100 W output
  • the sealed container 100 after forming bonded surfaces by bonding an outer wall surface of the peripheral portion of the opening and an inner wall surface of the lid portion in order to make it possible for at least an inner wall surface of the peripheral portion of the opening from the inner wall surface of the container body to make contact with the container contents, the bonded surfaces are irradiated with a laser to form a welded portion.
  • the sealed container 200 according to the second embodiment after forming bonded surfaces by bonding an edge surface of the opening and an inner wall surface of the lid portion in order to make it possible for at least an inner wall surface of the peripheral portion of the opening from the inner wall surface of the container body to make contact with the container contents, the bonded surfaces are irradiated with a laser to form a welded portion.
  • a process which provides a laser light absorbing portion in at least one of an outer wall surface of the peripheral portion of the opening or an inner wall surface of the lid portion, or in at least one of an edge surface of the opening or an inner wall surface of the lid portion, is preferably provided. Even if there are contours or undulations along the absorbing portion which make mechanical contact complicated, laser welding can be carried out with good precision. This is because the laser light can focus on the irradiation spot, and the place provided with the absorbing portion is mainly welded.
  • the absorbing portion can be formed by any method such as that where coloring is carried out by bonding an absorbing material such as an organic pigment or an inorganic pigment which absorb the wavelength of the laser light to a prescribed connecting place.
  • the wavelength of the laser light, the laser power and the laser scanning speed are preferably adjusted in accordance with the absorption degree of the absorbing portion for the laser light.
  • This process may be carried out at any time before laser irradiation, and may be provided before step S 1 , or in any one of step S 1 , step S 2 , step S 3 or step S 4 . Further, because this process is effective in the case where a material that does not have an absorption band for the laser light is welded, it is not an essential process.
  • a laser light absorbing material may be included in a portion of at least one of an outer wall surface of the peripheral portion of the opening or an inner wall surface of the lid portion, or in a portion of at least one of an end portion of the opening or an inner wall surface of the lid portion. This process may be carried out at any time before laser irradiation, and may be provided before step S 1 , or in any one of step S 1 , step S 2 , step S 3 or step S 4 .
  • a laser absorbing material such as a coloring pigment or the like is included in the case of forming the lid portion and/or the container body.
  • this process is effective in the case where a material that does not have an absorption band for the laser light is welded, it is not an essential process in the case where the material absorbs the laser light, such as the case that where a color container colored by mixing a pigment or the like is laser welded or the like.
  • the connected portion absorbs laser light as in some of the colored bottles
  • laser welding can be carried out just by irradiation with the laser.
  • the wavelength of the laser light, the laser power and the laser scanning speed are preferably adjusted in accordance with the content of the laser absorbing material such as a coloring pigment or the like.
  • the laser irradiation portion moves along the opening of the container body 61 , and sealing is finished by completing one cycle.
  • the welding speed depends on the shape and the material and the like to be connected, and is 8 ⁇ 50 cm/sec, for example.
  • the places welded by laser welding can be precisely controlled.
  • the output and the wavelength of the laser determine the degree of fusion welding, and a welded portion can be formed with better precision than heat sealing or ultrasonic welding.
  • laser irradiation may be carried out for two or more cycles. By passing the laser spot several times, or having a plurality of connected portions as shown in FIG. 2 , it is possible to carry out welding reliably. Further, laser welding in two or more loop shapes may be carried out by providing two or more laser oscillating elements and carrying out one cycle.
  • step S 5 laser welding is finished and the sealed container that was sealed is taken down from the turntable 69 .
  • step S 6 containers having sealing defects are removed by defective container removing means 70 .
  • the judgment of sealing defects is preferably carried out based on the monitoring results described above and visual inspection results of an image inspecting device (not shown in the drawings).
  • step S 4 is different in the process shown in FIG. 4 and the process shown in FIG. 5 , a description is given for step S 4 .
  • step S 4 the container body 61 with the lid 62 kept in alignment is placed on a turntable 69 .
  • Each container body 61 and the lid portion 62 thereof on the turntable 69 are at rest on the turntable.
  • a bonded portion 66 of the container body 61 and the lid portion 62 is irradiated with a laser by laser generating means 65 .
  • Irradiation with the laser can be carried out in a spot shape, a line shape or a ring shape, for example.
  • the laser irradiation shape is suitably selected by the positional relationship between the laser generating means 65 and the bonded portion 66 .
  • the laser intensity is preferably monitored by monitoring the laser output.
  • the spot position of the laser is preferably monitored by carrying out monitoring in the same way as the case described in the process of FIG. 4 .
  • the welding of plastic is also preferably monitored by carrying out monitoring in the same way as the case described in the process of FIG. 4 .
  • An imaging sensor such as a CCD or the like may be used at the same time.
  • the same element as that described in the process of FIG. 4 can be used as the laser oscillating element installed in the laser generating means 65 .
  • the sealed container 100 after forming bonded surfaces by bonding an outer wall surface of the peripheral portion of the opening and an inner wall surface of the lid portion in order to make it possible for at least an inner wall surface of the peripheral portion of the opening from the inner wall surface of the container body to make contact with the container contents, the bonded surfaces are irradiated with a laser to form a welded portion.
  • the sealed container 200 according to the second embodiment after forming bonded surfaces by bonding an edge surface of the opening and an inner wall surface of the lid portion in order to make it possible for at least an inner wall surface of the peripheral portion of the opening from the inner wall surface of the container body to make contact with the container contents, the bonded surfaces are irradiated with a laser to form a welded portion.
  • a process which provides a laser light absorbing portion and/or a process to include a laser light absorbing material are preferably provided in the same way as the process described in FIG. 4 .
  • the laser generating means 65 is rotated around the container body 61 and the lid portion 62 by laser generator rotating means 67 , the laser irradiation portion moves along the opening of the container body 61 , and sealing is finished by having the laser generating means 65 complete one cycle by the laser generator rotating means 67 .
  • the welding speed depends on the shape and the material and the like to be connected, and is 8 ⁇ 50 cm/sec, for example. At this time, the places welded by laser welding can be precisely controlled.
  • laser irradiation may be carried out for two or more cycles.
  • By passing the laser spot several times, or having a plurality of connected portions as shown in FIG. 2 it is possible to carry out welding reliably.
  • laser welding in two or more loop shapes may be carried out by providing two or more laser oscillating elements and carrying out one cycle.
  • the laser oscillating element is a rotary type which rotates around the container, high-speed movement and laser welding at a plurality of connected places (simultaneous timing or separate timing, irradiation at the same place or irradiation at separate places) becomes possible.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Ceramic Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Closing Of Containers (AREA)
  • Laser Beam Processing (AREA)
  • Closures For Containers (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
US10/598,534 2004-03-03 2005-02-24 Sealed container and manufacturing method thereof Abandoned US20070131639A1 (en)

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JP4757793B2 (ja) 2011-08-24
JPWO2005085077A1 (ja) 2007-12-06
AU2005219065A1 (en) 2005-09-15
EP1721831A1 (de) 2006-11-15
WO2005085077A1 (ja) 2005-09-15
KR20070006763A (ko) 2007-01-11
EP1721831A4 (de) 2010-02-17
CN1926025A (zh) 2007-03-07

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