초록 ▼

A method for sealing-in a gas in a gas filling compartment 5 of a bag having a cut-in 6 formed near the upper edge of the gas filling compartment. In the method, two edges of the bag with the contents inserted therein are gripped by grippers and suspended, the blow-in port of a gas (air) blow-in noz

A method for sealing-in a gas in a gas filling compartment 5 of a bag having a cut-in 6 formed near the upper edge of the gas filling compartment. In the method, two edges of the bag with the contents inserted therein are gripped by grippers and suspended, the blow-in port of a gas (air) blow-in nozzle is brought to contact the cut-in, the back surface side of the bag is supported by a backing member, gas (air) is blown into the gas filling compartment, and the position below the cut-in is held from both sides of the bag by a gas cut-off grippers while the gas blow-in continues, so that the gas inside the gas filling compartment is not allowed to escape from the cut-in, and then the entire bag mouth, including the cut-in, is sealed.

대표청구항 ▼

The invention claimed is: 1. A method for sealing-in a gas in a bag with a gas filling compartment, wherein: said method uses a bag with a gas filling compartment which is capable of having a gas sealed therein and is separated from a contents storing section, said bag being further formed, in surf

The invention claimed is: 1. A method for sealing-in a gas in a bag with a gas filling compartment, wherein: said method uses a bag with a gas filling compartment which is capable of having a gas sealed therein and is separated from a contents storing section, said bag being further formed, in surfaces of films that define the gas filling compartment, with a means for introducing gas for effecting communication between an inside of the gas filling compartment and an outside of said bag; and wherein, said method comprises 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 supporting 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 a part near said means for introducing gas from both surfaces of said bag with 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 the gas to be sealed in the gas filling compartment. 2. The method for sealing-in a gas in a bag with a gas filling compartment according to claim 1, wherein sealing of said means for introducing gas is effected by sealing both surfaces of said bag at location of said means for introducing gas. 3. The method for sealing-in a gas in a bag with a gas filling compartment according to claim 2, wherein, in said bag with a gas filling compartment, said means for introducing gas is formed in the vicinity of a bag mouth of said bag, and after the flow of gas between said means for introducing gas and the inside of the gas filling compartment is cut off, the entire bag mouth is sealed from both surfaces of said bag, at which time said means for introducing gas is sealed together therewith, thus sealing the gas inside the gas filling compartment. 4. The method for sealing-in a gas in a bag with a gas filling compartment according to claim 1, wherein said bag with a gas filling compartment is a bag in which the gas filling compartment has a closed contour formed to extend in a longitudinal direction between films that make front and back surfaces in sealed portions at lateral side edges of said bag. 5. The method for sealing-in a gas in a bag with a gas filling compartment according to claim 4, wherein said bag with a gas filling compartment is a bottom-gusseted type self-standing bag. 6. The method for sealing-in a gas in a bag with a gas filling compartment according to claim 5, wherein said bag with a gas filling compartment is a bag in which: a lower edge of the gas filling compartment formed in lateral side edge sealed portions extends further downward, and the gas filling compartment is formed also between films that make the front and back surfaces of said bag and a film that makes a bottom surface of said bag. 7. The method for sealing-in a gas in a bag with a gas filling compartment according to claim 1, wherein said bag with a gas filling compartment is a bag in which: said films that make the front and back surfaces of said bag are laminated films; and the gas filling compartment having a closed contour is formed to extend in a longitudinal direction in an interior of at least one of the laminated films that make the front and back surfaces of said bag. 8. The method for sealing-in a gas in a bag with a gas filling compartment according to claim 7, wherein said bag with a gas filling compartment is a bottom-gusseted type self-standing bag. 9. The method for sealing-in a gas in a bag with a gas filling compartment according to any one of claims 4 to 8, wherein said bag with a gas filling compartment is a bag in which: the gas filling compartment extends downward from the vicinity of upper edges of the lateral side edge sealed portions, and said means for introducing gas is formed in the vicinity of an upper edge of the gas filling compartment; and after holding a position downward from said means for introducing gas with said cut-off gripper and thus cutting off the flow of gas between said means for introducing gas and the inside of the gas filling compartment, the bag mouth is sealed from both surfaces of said bag, at which time said means for introducing gas is sealed together therewith, thus sealing the gas inside the gas filling compartment. 10. The method for sealing-in a gas in a bag with a gas filling compartment according to any one of claims 4 to 8, wherein said bag with a gas filling compartment is a spout-equipped bag having a spout inserted and sealed in the bag mouth thereof. 11. The method for sealing-in a gas in a bag with a gas filling compartment according to claim 10, wherein said bag with a gas filling compartment is a bag in which the gas filling compartment extends downward from the vicinity of upper edges of the lateral side edge sealed portions, and said means for introducing gas is formed in the vicinity of an upper edge of the gas filling compartment; and after holding a position downward from said means for introducing gas with said cut-off gripper and thus cutting off the flow of gas between said means for introducing gas and the inside of the gas filling compartment, the bag mouth is sealed from both surfaces of said bag, so that sealing is performed both between films at the bag mouth and between the films at the bag mouth and the spout, at which time said means for introducing gas is sealed together therewith, thus sealing the gas inside the gas filling compartment. 12. A method for packaging a bag with a gas filling compartment wherein bags, held at both lateral side edges thereof by grippers and suspended, are conveyed; and during a course of said bag conveyance, various packaging processes including bag mouth opening, filling said bag with contents to be packaged, and bag mouth sealing are successively performed; wherein said method uses a bag with a gas filling compartment which is capable of having a gas sealed therein and is separated from a contents storing section, said bag being further formed, in surfaces of films that define the gas filling compartment, with a means for introducing gas for effecting communication between an inside of the gas filling compartment and an outside of said bag, and said means for introducing gas being formed in the vicinity of a bag mouth of said bag; and wherein, a process for sealing gas in the gas filling compartment of said bag is executed after a process for filling said bag with contents to be packaged; and said process for sealing gas comprises 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 supporting 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 a part near said means for introducing gas from both surfaces of said bag 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 the bag mouth of said bag from both surfaces of said bag, at which time said means for introducing gas is sealed together therewith, thus sealing the gas inside the gas filling compartment. 13. The method for packaging a bag with a gas filling compartment according to claim 12, wherein said bag with a gas filling compartment is a bag in which: the gas filling compartment has a closed contour formed to extend in a longitudinal direction of said bag between films that make front and back surfaces in sealed portions at lateral side edges of said bag, the gas filling compartment extends downward from the vicinity of upper edges of the lateral side edge sealed portions, and said means for introducing gas is formed in the vicinity of an upper edge of the gas filling compartment; and wherein after holding a position downward from said means for introducing gas with said cut-off gripper and cutting off the flow of gas between said means for introducing gas and the inside of the gas filling compartment, sealing the overall bag mouth from both surfaces of said bag, at which time said means for introducing gas is sealed together therewith, thus sealing the gas inside the gas filling compartment. 14. The method for packaging a bag with a gas filling compartment according to claim 13, wherein said bag with a gas filling compartment is a bottom-gusseted type self-standing bag. 15. The method for packaging a bag with a gas filling compartment according to claim 14, wherein said bag with a gas filling compartment is a bag in which: a lower edge of the gas filling compartment formed in lateral side edge sealed portions extends further downward, and the gas filling compartment is formed also between films that make the front and back surfaces of said bag and a film that makes a bottom surface of said bag. 16. The method for packaging a bag with a gas filling compartment according to claim 12, wherein said bag with a gas filling compartment is a bag in which: films that make the front and back surfaces of said bag are laminated films, a gas filling compartment having a closed contour is formed to extend in a longitudinal direction in an interior of at least one of the laminated films that make the front and back surfaces of said bag, the gas filling compartment extends downward from the vicinity of upper edges of the lateral side edge sealed portions, and said means for introducing gas is formed in the vicinity of an upper edge of the gas filling compartment; and wherein after holding a position downward from said means for introducing gas with said cut-off gripper and thus cutting off the flow of gas between said means for introducing gas and the inside of the gas filling compartment, the bag mouth is sealed from both surfaces of said bag, at which time said means for introducing gas is sealed together therewith, thus sealing the gas inside the gas filling compartment. 17. The method for packaging a bag with a gas filling compartment according to 16, wherein said bag with a gas filling compartment is a bottom-gusseted type self-standing bag. 18. A method for packaging a bag with a spout, wherein said method conveys a bag with a spout by inserting a bifurcated spout holding member between upper and lower flanges formed in the spout of said bag; and in the course of bag conveyance, packaging processes including sealing films at a bag mouth of said bag and spouts, making seals between the films at the bag mouth, filling said bag with contents to be packaged, and capping the spouts, are successively performed; and said bag with a spout is formed with a gas filling compartment which is capable of having a gas sealed therein and is separated from a contents storing section, said bag being further formed, in surfaces of films that define the gas filling compartment, with a means for introducing gas for effecting communication between an inside of the gas filling compartment and an outside of said bag, and said means for introducing gas being formed in the vicinity of a bag mouth of said bag; and wherein a process for sealing gas in the gas filling compartment of said bag is executed after a process for filling said bag with contents to be packaged; and said process for sealing gas comprises 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 supporting 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 a part near said means for introducing gas from both surfaces of said bag 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 the bag mouth of said bag from both surfaces of said bag, at which time said means for introducing gas is sealed together therewith, thus sealing the gas inside the gas filling compartment. 19. The method for packaging a bag with a spout according to claim 18, wherein: said bag with a spout is a bag in which: the gas filling compartment has a closed contour formed to extend in a longitudinal direction of said bag between films that make front and back surfaces in sealed portions at lateral side edges of said bag, the gas filling compartment extends downward from the vicinity of upper edges of the lateral side edge sealed portions, and said means for introducing gas is formed in the vicinity of an upper edge of the gas filling compartment; and wherein after holding a position downward from said means for introducing gas with said cut-off gripper and cutting off the flow of gas between said means for introducing gas and the inside of the gas filling compartment, the bag mouth is sealed from both surfaces of said bag, so that sealing is performed both between films at the bag mouth and between the films at the bag mouth and the spout, at which time said means for introducing gas is sealed together therewith, thus sealing the gas inside the gas filling compartment. 20. The method for packaging a bag with a spout according to claim 19, wherein said bag with a spout is a bottom-gusseted type self-standing bag. 21. The method for packaging a bag with a spout according to claim 20, wherein said bag with a spout is a bag in which: a lower edge of the gas filling compartment formed in lateral side edge sealed portions extends further downward; and the gas filling compartment is formed also between films that make the front and back surfaces of said bag and a film that makes a bottom surface of said bag. 22. The method for packaging a bag with a spout according to claim 18, wherein said bag with a spout is a bag in which: films that make the front and back surfaces of said bag are laminated films, a gas filling compartment having a closed contour is formed to extend in a longitudinal direction in an interior of at least one of the laminated films that make the front and back surfaces of said bag, the gas filling compartment extends downward from the vicinity of upper edges of the lateral side edge sealed portions, and said means for introducing gas is formed in the vicinity of an upper edge of the gas filling compartment; and wherein after holding positions downward from said means for introducing gas with said cut-off gripper and thus cutting off the flow of gas between said means for introducing gas and the inside of the gas filling compartment, the bag mouth is sealed from both surfaces of said bag, so that sealing is performed both between films at the bag mouth and between the films at the bag mouth and the spout, at which time said means for introducing gas is sealed together therewith, thus sealing the gas inside the gas filling compartment. 23. The method for packaging a bag with a spout according to claim 22, wherein said bag with a spout is a bottom-gusseted type self-standing bag.