Method for sealing-in a gas in a bag with a gas filling compartment

A method for sealing-in a gas in a bag with a gas filling compartment,

• said bag comprising an outer bag and an inner bag which is provided inside of and is smaller in width than the outer bag, wherein
• the inner bag has an opening along an upper edge thereof;
• films of the inner bag and films of the outer bag are sealed together, on each side of respective bags, along upper edges thereof, the films of the inner bag and the films of the outer bags are sealed together along lower edges thereof, and further the films of the outer bag are sealed together at upper and lower edges thereof on both lateral sides of the inner bag and along both lateral side edges thereof, thus forming a gas filling compartment between the films of the inner bag and outer bag;
• a means for introducing gas is formed in at least one side of the outer bag;
• and
• the films of the outer bag are sealed together in the vicinity of said means for introducing gas, and sealed portions thereof surround a periphery of said means for introducing gas, leaving a gas flow path communicating to inside of said gas filling compartment, and
• said method comprising the steps of:
• placing a blow-out port of a nozzle, which is connected to a pressurized gas supply source, against said means for introducing gas and holding a back surface side of said bag with a backing member;
• blowing a gas from said nozzle into an inside of the gas filling compartment through said means for introducing gas;
• gripping and thus closing the gas flow path in the sealed portions surrounding a periphery of said means for introducing gas by a blocking gripper while the gas blow-in continues, thus cutting off a flow of gas between said means for introducing gas and an inside of the gas filling compartment;
• and
• sealing said means for introducing gas, thus allowing said gas to be sealed in the gas filling compartment.

A method for sealing-in a gas in a bag with a gas filling compartment,

• said bag comprising an outer bag and an inner bag which is provided inside of the outer bag, wherein
• the inner bag has an opening along an upper edge thereof;
• films of the inner bag and films of the outer bag are sealed together, on each side of respective bags, along upper edges thereof, and further both lateral side edges and lower edges of the films of the inner bag and the films of the outer bag are sealed together, thus forming gas filling compartments between the films of the inner bag and the films of the outer bag;
• means for introducing gas in the gas filling compartments are formed in the respective films of the outer bag, said means for introducing gas are formed respectively in the films of the outer bag so as to be located in the vicinity of upper edge side corners on mutually opposite lateral side edges;
• and
• the films of the outer bag and the films of the inner bag are sealed together in the vicinity of said means for introducing gas, and sealed portions thereof surround peripheries of said means for introducing gas, leaving gas flow paths communicating to insides of said gas filling compartments, and
• said method comprising the steps of:
• placing a blow-out port of a nozzle, which is connected to a pressurized gas supply source, against said means for introducing gas and holding a back surface side of said bag with a backing member;
• blowing a gas from said nozzle into an inside of the gas filling compartment through said means for introducing gas;
• gripping and closing the gas flow path in the sealed portions surrounding a periphery of said means for introducing gas by a blocking gripper while the gas blow-in continues, thus cutting off a flow of gas between said means for introducing gas and an inside of the gas filling compartment;
• and
• sealing a bag mouth of said bag from both surfaces and said means for introducing gas, thus allowing said gas to be sealed in the gas filling compartment.

A method for sealing-in a gas in a bag with a gas filling compartment,

• said bag comprising an outer bag and an inner bag which is provided inside of the outer bag, wherein
• the inner bag has an opening along an upper edge thereof;
• films of the inner bag and films of the outer bag are sealed together, on each side of respective bags, along upper edges thereof, and further both lateral side edges and lower edges of the films of the inner bag and the films of the outer bag are sealed together, thus forming gas filling compartments between the films of the inner bag and the films of the outer bag;
• means for introducing gas in the gas filling compartments are formed in the respective films of the outer bag, said means for introducing gas being formed respectively in the films of the outer bag so as to be located in the vicinity of upper edge side corners on mutually opposite lateral side edges;
• the films of the outer bag and the films of the inner bag are sealed together in the vicinity of said means for introducing gas, and sealed portions thereof surround peripheries of said means for introducing gas, leaving gas flow paths communicating to insides of said gas filling compartments;
• a supplemental sealed portion is formed by sealing the films of the outer bag and the films of the inner bag;
• said supplemental sealed portion and an upper edge sealed portion and/or one of lateral side edge sealed portions form said sealed portions that surround the periphery of said means for introducing gas;
• said supplemental sealed portion is formed in said bag by mutually sealing a part of the films of the outer bag and a part of the films of the inner bag on each side of respective bags, and
• said method comprising the steps of:
• placing a blow-out port of a nozzle, which is connected to a pressurized gas supply source, against said means for introducing gas and holding a back surface side of said bag with a backing member;
• blowing a gas from said nozzle into an inside of the gas filling compartment through said means for introducing gas;
• gripping and closing the gas flow path in the sealed portions surrounding a periphery of said means for introducing gas by a blocking gripper while the gas blow-in continues, thus cutting off a flow of gas between said means for introducing gas and an inside of the gas filling compartment;
• and
• sealing a bag mouth of said bag from both surfaces and said means for introducing gas, thus allowing said gas to be sealed in the gas filling compartment.

A method for sealing-in a gas in a bag with a gas filling compartment,

• said bag comprising an outer bag and an inner bag which is provided inside of and is smaller in width than the outer bag, wherein
• the inner bag has an opening along an upper edge thereof;
• films of the inner bag and films of the outer bag are sealed together, on each side of respective bags, along upper edges thereof, the films of the inner bag and the films of the outer bags are sealed together along lower edges thereof, and further the films of the outer bag are sealed together at upper and lower edges thereof on both lateral sides of the inner bag and along both lateral side edges thereof, thus forming a gas filling compartment between the films of the inner bag and outer bag;
• a means for introducing gas is formed in at least one side of the outer bag, said means for introducing gas being formed in the films of the outer bag are located in the vicinity of upper edge side corners;
• and
• the films of the outer bag are sealed together in the vicinity of said means for introducing gas, and sealed portions thereof surround a periphery of said means for introducing gas, leaving a gas flow path communicating to inside of said gas filling compartment, and
• said method comprising the steps of:
• placing a blow-out port of a nozzle, which is connected to a pressurized gas supply source, against said means for introducing gas and holding a back surface side of said bag with a backing member;
• blowing a gas from said nozzle into an inside of the gas filling compartment through said means for introducing gas;
• gripping and closing the gas flow path in the sealed portions surrounding a periphery of said means for introducing gas by a blocking gripper while the gas blow-in continues, thus cutting off a flow of gas between said means for introducing gas and an inside of the gas filling compartment;
• and
• sealing a bag mouth of said bag from both surfaces and said means for introducing gas, thus allowing said gas to be sealed in the gas filling compartment.