Opening curled portion of metal can and forming method thereof

A method for configuration of an outwardly curled portion formed on an opening portion of a metal can, in which both inner and outer faces of a metal sheet forming at least around the opening portion are covered with a resin film, in which the curled portion formed above an inclined face by curling...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	ENOKI YASUSHI, MATSUO TOSHIO
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS,e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES,DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS CONVEYING HANDLING THIN OR FILAMENTARY MATERIAL MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL PACKAGES PACKAGING ELEMENTS PACKING PERFORMING OPERATIONS PUNCHING METAL ROLLING OF METAL STORING TRANSPORTING WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL
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Beschreibung
Zusammenfassung:	A method for configuration of an outwardly curled portion formed on an opening portion of a metal can, in which both inner and outer faces of a metal sheet forming at least around the opening portion are covered with a resin film, in which the curled portion formed above an inclined face by curling an upper end of a trim end portion so as to confine it inside of the curled portion, as being squeezed in the can radius direction so as to contact a lower end thereof with the inclined face, and in which the metal sheet layers are folded in the can radius direction via the resin films except around both upper and lower ends of the curled portion. Accordingly, the trim end portion of in the curled portion can be prevented from getting rusty, and deterioration in the appearance of the curled portion can be avoided. Moreover, the strength of the curled portion is enhanced so that the resistance against the deformation is improved.