Laminated, blow-molded container and process for forming one or more air intake holes
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United States of America Patent
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Aug 15, 2017
Grant Date -
Sep 24, 2015
app pub date -
May 5, 2015
filing date -
Aug 31, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
Disclosed is a process for forming one or more air intake holes wherein the punch-cutter to be used has a cylindrical blade at the tip, and also has a hooking portion or portions, which is/are disposed on an inner peripheral surface of the cylindrical blade and which performs a function of hooking into a portion of the outer layer that has come inside the cylindrical blade to prevent the cylindrical blade from slipping out of that portion of the outer layer at a time when the cylindrical blade is moved backward, the cylindrical blade is pressed forward until the blade edge comes to a position close to the outer layer, and at this position, the outer layer is not yet cut out completely, but there remains a circular uncut portion ahead of the blade edge, then, the cylindrical blade is moved backward.
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