Gas Charging Method and Gas Charging Apparatus for Bag Equipped with Gas Compartment Portion
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United States of America Patent
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Issued Date -
Sep 11, 2014
app pub date -
Mar 5, 2014
filing date -
Mar 5, 2013
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Abstract
In a method and apparatus for charging a gas into a gas compartment portion (6) of a bag (1), after a pre-heating step which is performed in stop position (IV) so that the gas compartment portion of the bag is heated by a heated gas-blowing nozzle (27), a preliminary gas injection step for injecting gas into the gas compartment portion is performed by a gas blowing nozzle (28) and a receiving member (29) in stop position (V). Then, a gas filling step is carried out in stop position (VI) by gas injection nozzles (23, 24), and the incision (9) in the gas compartment portion is sealed in stop position (VII). In the following pre-heating step, the front and rear film sheets (7, 8) of the gas compartment portion are softened, and in the preliminary gas injection step, the film sheets are separated and their adhesion is eliminated.
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