Patent ID: 7482051

Claim:
An inflatable bubble wrapping sheet that sealingly contains air for protecting a product, comprising: first and second thermoplastic films superposed with each other; tube partition seals to create a plurality of air tubes by heat sealing the first and second thermoplastic films; bubble partition seals located between said tube partition seals to partition each of said air tubes into a plurality of air bubbles by heat sealing the first and second thermoplastic films, where a length of said bubble portion seal is shorter than a width between two adjacent tube partition seals; a plurality of check valves established between said first and said second thermoplastic films for the air tubes, each of the check valves allowing the air to flow in a predetermined direction; an air input formed on one of the check valves to supply the air to all of the air tubes through the check valves; a check valve film bonded to at least one of the thermoplastic films to form the plurality of check valves; a common air duct portion formed between the check valve film and the at least one of the thermoplastic films, wherein the common air duct portion includes peeling agents covering at least portions of the tube partition seals within the common air duct potion; and wherein each of the said check valves is configured by an air flow maze portion forming an air passage of a zig-zag shape for supplying the air to the air tubes each having the serially connected air bubbles, and a common air duct portion which provides the air to the air flow maze portion of an air tube as well as to the air flow maze portion of a next air tube.