Screw-top bottle-can and method for producing the same
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United States of America Patent
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Oct 6, 2015
Grant Date -
Jan 9, 2014
app pub date -
Mar 27, 2012
filing date -
Mar 28, 2011
priority date (Note) -
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Abstract
A method for producing a screw-top bottle-can and a screw-top bottle-can are provided so that a screw-thread can be formed without damaging an inner coating and a resealing operation can be improved. A shoulder part is formed by reducing a diameter of an opening part of a closed-end cylindrical body, a cylindrical part having an intermediate diameter between a major thread diameter and a minor thread diameter and a tapered part which is tapered from an upper end of the cylindrical part toward an opening-end part are formed above the shoulder part, and forming a screw-thread from the tapered part to the cylindrical part so as to form a starting part of the screw-thread at a middle part of the tapered part.
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