| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a bottle body made of a synthetic resin which can create a panel structure smoothly deformable corresponding to a remarkable changing of pressure from a pressurizing condition to a vacuum condition by sufficiently exhibiting both a compression absorptive function and a vacuum absorptive function, and can ensure a good appearance and usage even for a retort food. <P>SOLUTION: In a round type bottle body wherein panels for absorbing change of the inner pressure is arranged on a body part, the panels are formed by surrounding the periphery by a recessed stepped part and comprises a recessed part reversible to protrude in flat cross-section and a protruded part reversible into recess, both of which parts are abutted against each other vertically, and thus the pressure inside the bottle can be pressurized and evacuated. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
