| CPC F17C 5/06 (2013.01) [F17C 2203/0685 (2013.01); F17C 2205/0311 (2013.01); F17C 2221/031 (2013.01)] | 10 Claims |
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1. A gas filling method of enclosing a gas in a gas accommodation portion of a bag comprising a content accommodation portion and the gas accommodation portion, the gas filling method including the steps of:
transferring the bag in an intermittent manner to arrange the bag at a gas blowing processing position;
inserting a blowing nozzle into a gas guide path of the bag in the gas blowing processing position, the gas guide path being communicated with the gas accommodation portion;
pinching the blowing nozzle arranged in the gas guide path from outside of the bag with a pair of pinching members in the gas blowing processing position;
causing the blowing nozzle to eject the gas in a state where the blowing nozzle is pinched via the bag by the pair of pinching members in the gas blowing processing position in such a manner that the gas is sent to the gas accommodation portion; and
closing the gas accommodation portion in an airtight manner in the gas blowing processing position in a state where the blowing nozzle is arranged in the gas guide path,
wherein the step of inserting the blowing nozzle into the gas guide path includes the steps of:
causing the blowing nozzle to move a front side film member away from a rear side film member while contacting the front side film member protruding from the rear side film member, in such a manner that an opening section of the gas guide path formed by the front side film member and the rear side film member is opened; and
inserting the blowing nozzle into the gas guide path via the opening section.
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