Patent ID: 7934522

Claim:
A multi-sectional airtight seal for continuous air-filling, formed by thermal-sealing two up-down stacked outer films and a plurality of inner films between the two outer films, comprising: an input passage, located between the two outer films; a plurality of main air tubes, aligned parallel to a lateral side of the input passage, operative as air storage formed by thermal-sealing the two outer films; a plurality of single-path valve devices, connecting the main air tube and the input passage; and a plurality of auxiliary tubes, located at an end of each of the plurality of main air tubes, each of the auxiliary tubes comprising: a first sub-tube, serially connecting with the main air tube, operative as air storage formed by thermal-sealing the two outer films; a second sub-tube, serially connecting with the first sub-tube, operative as air storage formed by thermal-sealing the two outer films; and a first valve device, comprising a first filling passage and a second filling passage, the first filling passage connecting the first sub-tube and the main air tube, the second filling passage connecting the second sub-tube and the main air tube.