Structure of air-packing device

An air-packing device inflatable by compressed air for protecting a product therein, comprising:

• first and second thermoplastic films superposed with each other where predetermined portions of the first and second thermoplastic films are bonded, thereby creating a plurality of air containers, each of the air containers having a plurality of series connected air cells;
• a plurality of check valves established at inputs of the corresponding air containers between the first and second thermoplastic films for allowing the compressed air to flow in a forward direction, the check valve being attached to only one of the first and second thermoplastic films;
• an air input commonly connected to the plurality of check valves to supply the compressed air to all of the series connected air cells through the check valves;
• and
• wherein, through a post heat-seal treatment, predetermined edge portions of the air-packing device are bonded with one another after being folded, thereby creating an inner space for packing a product therein and an opening for loading the product therethrough.