| 摘要 |
PROBLEM TO BE SOLVED: To provide a container excellent in impact test aptitude even if a retort sterilization process is carried out. SOLUTION: There is provided a container in which an inner pressure of the container is detected in response to a sound characterstic of vibration generated under an application of striking force. An annular bead 6 protruded to a side becoming an outer surface is formed at a circumferential edge of a flat plate segment 7, and a concave panel segment 8 notched at a side becoming an inner surface is formed at the central part of the flat plate segment 7. Accordingly, when the inner pressure is reduced after the inner pressure is increased, the deformation generated through increasing in the inner pressure returns back to its original state and the impact test aptitude is improved. COPYRIGHT: (C)2004,JPO
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