| 摘要 |
<p>Method of producing a container which is hermetically sealed immediately after steam (40) is blown into the main body of a container (1) in which contents (4) such as solid foodstuffs are packed in such a manner as to leave a space (3), or after an inert gas (51) is blown, and which can control the degree of a relatively low internal negative pressure within a small range of changes. The steam (40) is generated by blowing a non-condensable gas such as air or nitrogen gas at a predetermined flow rate into thermostated water (13). When the inert gas (51) is blown, only the surface portion of the contents (4) is heated by the blow of the steam (40). The degree of internal negative pressure can be detected by measuring the extent of recession of the wall (1a) of the main body which undergoes elastic recession according to the degree of the internal negative pressure from the same line.</p> |
