Viscous material container having annularly contacting piston
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United States of America Patent
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Jul 19, 2016
Grant Date -
Apr 2, 2015
app pub date -
Mar 25, 2014
filing date -
Sep 30, 2013
priority date (Note) -
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Abstract
A viscous material container that makes it unlikely that air remains in a housing when a piston is inserted from an insertion port of the housing. A first section of the housing is formed with two groove portions communicating with a first passage to discharge air in the first passage when a piston is inserted from an insertion port. The two groove portions communicate with the insertion port, and extend along a first imaginary center line.
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