Patent ID: 7959759

Claim:
A method for manufacturing a double layer air cylinder type air enclosure, comprising the steps of: providing at least one middle film sheet; providing two first inner film sheets, two second inner film sheets and first and second outer film sheets; spreading a first heat resistant material between the two first inner film sheets and spreading a second heat resistant material between the two second inner film sheets; stacking the two first inner film sheets, the middle film sheet and the two second inner film sheets so that the two first inner film sheets are laid on one side of the middle film sheet and the two second inner film sheets are laid on the other side of the middle film sheet; hot-sealing the middle film sheet, the two first inner film sheets and the two second inner film sheets to form a first check valve with a first air passageway and a second check valve with a second air passageway on two respective sides of the middle film sheet, wherein the length of one of the two first inner film sheets is shorter than the length of the other of the two first inner film sheets, the one of the two first inner film sheets is more adjacent to the middle film sheet than the other of the two first inner film sheets, the length of one of the two second inner film sheets is shorter than the length of the other of the two second inner film sheets, and the one of the two second inner film sheets is more adjacent to the middle film sheet than the other of the two second inner film sheets; stacking the first and second outer film sheets so the middle film sheet, the two first inner film sheets and the two second inner film sheets are laid between the two outer film sheets; hot-sealing ends or middle parts of the two outer film sheets to form an air filling passageway; adhering the two outer film sheets to one of the two first inner film sheets and one of the two second inner film sheets at respective combination points in the air filling passageway; and hot-sealing the two outer film sheets and the middle film sheet to form a first air storable air chamber between the middle film sheet and the first outer film sheet, and a second air storable air chamber between the middle film sheet and the second outer film sheet, wherein the first and second air passageways connect the air filling passageway with the first and second air chambers, respectively, so that air enters the air filling passageway and immediately flows into the two air chambers via the two air passageways to fill and expand the two air chambers with air, and air in the two air chambers compress the two check valves to close the air passageway to prevent air in the two air chambers from leaking out to attain air locking.