Air packaging device product and method for forming the product

A method of producing an air packaging device, comprising the steps of:

• (a) heat sealing at least two layers of films to form a space defined by a plurality of independent sealed air chambers and a main channel having an air inlet, wherein said plurality of independent sealed air chamber includes a first air chamber, a second air chamber and a third air chamber while each of said first air chamber, said second air chamber and said third air chamber is connected with said main channel by at least one one-way valve, so as to form a semi-finished product;
• (b) folding up said semi-finished product and heat sealing two heat sealing lines provided at both sides of said semi-finished product to define a receiving cavity between said two heat sealing lines and an opening;
• and
• (c) heat sealing a heat sealing line provided on said at least one one-way valves that connects said third air chamber to said main channel so said third air chamber is not inflated, wherein said heat sealing line seals off said respective at least one one-way valve to prevent air from penetrating said third air chamber from said main channel while said first air chamber and said second chamber are inflated by air penetrating said first air chamber and said second air chamber from said main channel.