Structure of air-packing device having improved shock absorbing capability

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 compressed air to flow in a forward direction;
• 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
• heat-seal flanges that are made of thermoplastic film and are formed on side edges close to both ends and intermediate positions of the air-packing device;
• wherein, through a post heat-seal treatment, predetermined points on said air containers are bonded with one another, and said heat-seal flanges are bonded with one another, thereby creating two container portions facing with one another each having an opening for packing a product therein and two cushion portions at opposite ends of the air-packing device for supporting the container portions when the air-packing device is inflated by the compressed air.

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 compressed air to flow in a forward direction;
• 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
• heat-seal flanges that are made of at least one of first and second thermoplastic films and are formed on side edges of the air-packing device;
• wherein, said air-packing device in a sheet form is folded in a W-shape in cross section, and through a post heat-seal treatment, predetermined points on said air containers are bonded with one another, and said heat-seal flanges are bonded with one another, thereby creating a container portion having an opening for packing a product therein and a double layer cushion portion at an outer periphery of the container portion when the air-packing device is inflated by the compressed air.