| 摘要 |
PROBLEM TO BE SOLVED: To efficiently flush by blowing out inert gas through a gas nozzle upwardly from under a shaping lid corner projecting out of a tray corner while pressing the vicinity of the center of an upper surface of a shaping lid by a support member. SOLUTION: In gas flushing, after air in a chamber is eliminated, a shaping lid 21 put over a tray 16 is pressed by a rubber-made support member 28 at a lower end of a piston rod which passes through a hole 27 of a frame sealer 20, and inert gas is flushed from a gas nozzle 34 opened upward on a seal base 15 via a tube 33. The nozzle 34 is provided below the shaping lid 21, and accordingly while pressing the vicinity of the center of the lid 21 by the support member 28, corners of the lid are pushed up by pressure of the gas blowing up from the nozzle 34 thereby filling the gas into the tray 16. Thereafter, a pressure fluid is fed into a bag 13 from a line 36, wherein its pressure pushes up the seal base 15 to heat-seal the tray 16 with the lid material 21 between the base 15 and the upper frame sealer 20.
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