BAG EQUIPPED WITH A GAS CHANNEL AND A METHOD AND APPARATUS FOR PACKAGING SUCH A BAG
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United States of America Patent
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Mar 10, 2016
app pub date -
Sep 4, 2015
filing date -
Sep 5, 2014
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Abstract
A method and apparatus for packaging a bag (1) in which a gas channel (5) where the laminated films constituting the front and back faces of the bag are not fused is formed inside a sealed part (2) of the side edge, with the lower end of the gas channel opening (through a communicating portion (5b)) into the bag, and a gas inlet (5a) that allows the gas channel to communicate with the outside of the bag being formed at the upper end of the gas channel. After the bag has been filled with its filling material, a pressurized inert gas is blown from the gas inlet into the gas channel and then through the gas channel into the bag, thus replacing the air inside the bag with the inert gas. After this gas replacement, the gas inlet is sealed, and the bag mouth is also sealed.
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