Thermal indicator
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United States of America Patent
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Dec 16, 2014
Issued Date -
N/A
app pub date -
Nov 19, 2012
filing date -
Nov 25, 2011
priority date (Note) -
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Abstract
A heat-sensitive indicator that prevents a solid-state colored hot-meltable substance from being absorbed into an absorber and surely absorbs a colored melt includes an ampule bottle enclosing a colored heat-sensitive material that melts into a colored melt at a predetermined temperature, a composite membrane rolled cylindraceous body joining an absorbable membrane for the colored melt onto one surface side of an impermeable membrane for the colored melt so that the impermeable membrane is located inside thereof, and a tube inserting and sealing the ampule bottle into a space surrounded by the impermeable membrane through which the absorbable membrane color is visible from the outside. After part of the ampule bottle is broken below the melting point of the colored heat-sensitive material to discharge a portion of the heat-sensitive material into the space and the heat-sensitive material is melted, a colored portion of the absorbable membrane is formed.
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