Container and seal bar
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United States of America Patent
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Feb 27, 2018
Grant Date -
Dec 22, 2016
app pub date -
Jun 27, 2014
filing date -
Jul 1, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A container is provided that includes a container body and a lid member, the container body and the lid member being sealed by an annular seal portion. There is provided a detaching seal portion which is detached in response to increase of pressure inside the container body associated with deformation of the container body. The annular seal portion is formed by a pressing operation of pressing the lid member against the flange via a seal bar having at its leading end an annular projection having a shape corresponding to the annular seal portion, a groove-like sunk portion corresponding to the annular projection being formed in the flange by the pressing operation. At least a portion of the sunk portion formed in the detaching seal portion comprises an uneven groove having a cross sectional shape with a smaller curvature radius on its radial inner side than its radial outer side.
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