Patent ID: 8366594

Claim:
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 therebetween for storing air, said space having a plurality of air chambers with at least a one-way valve to form a semi-finished product, wherein said air chambers include at least two first air chambers at both sides of said air packaging device respectively and second air chambers formed between said two first chambers, wherein two heat sealing lines are provided between said two first chambers and two said second air chambers adjacent to said two first chambers respectively; (b) folding one end of said semi-finished product towards another end of said semi-finished product; (c) heat sealing said two heat sealing lines to form a bag having a receiving cavity defined between said two heat sealing lines and an opening, wherein said two first air chambers form two side pressure air chambers to provide a lateral cushioning effect after said air chambers of said air packaging device are inflated with air to form a finished product; and (d) heat sealing a sealing off heat sealing line on said one-way valve of at least one of said second air chamber positioned adjacent to said respective first air chamber to seal off said one-way valve thereof from filling with air, so as to increase a horizontal length of said receiving cavity for receiving an article with larger length therein.