| 摘要 |
PCT No. PCT/JP88/00025 Sec. 371 Date Sep. 13, 1988 Sec. 102(e) Date Sep. 13, 1988 PCT Filed Jan. 13, 1988 PCT Pub. No. WO88/05402 PCT Pub. Date Jul. 28, 1988.A method of making a hermetically sealed container is disclosed. In the method, a water vapor (40) is blown into a container body (1) that has been placed with a product such as solid foods or the like leaving a space portion (3). Immediately thereafter or immediately after an inert gas (51) has been blown into the container body, the container body is hermetically sealed. The container has a relatively low negative internal pressure which is controllable with a small range of variation. The water vapor (40) is generated by blowing a non-condensable gas such as air, nitrogen gas or the like at a constant flow rate into a water (13) which is controlled to a constant temperature. When the inert gas (51) is blown, only the surface and its vicinity of the product (4) is heated by blowing the water vapor (40). For the container body having a wall portion (1a) that is elastically deformable concavely depending on the negative internal pressure, the negative internal pressure can be detected by measuring the amount of the concave deformation in the wall portion (1a) on the same line as that for the sealing.
|
