Seal strip and method and device for sewing same

A device for sewing a seal strip comprising a tubular seal strip body with a first end and a second end, wherein the first end extends into the second end and is securely connected to the second end by a sewing thread, including a rack, wherein the device comprises:

• a first device for positioning the ends of the seal strip to position the first end and the second end of the seal strip;
• and
• a second device for butt-joining the ends of the seal strip, comprising a first fixture and a second fixture to clamp the first end and the second end of the seal strip respectively,
• wherein the first fixture comprises:
• a limit slot fixed on the rack;
• and
• a clamp cover hinged on the rack and matched with the limit slot;
• the second fixture comprises:
• two parallel limit strips fixed on the rack;
• a mobile table arranged on the rack;
• a lower chuck fixed on the mobile table, which is an arc supporting spring positioned between the two limit strips;
• a swinging arm hinged with the mobile table;
• an upper chuck fixed at free end of the swinging arm, which is rod-shaped, cooperates with the arc supporting spring to clamp the second end of the seal strip and gets into the first end of the seal strip along with the mobile table;
• a means for sewing the seal strip, comprising a rotary fixture positioned on the rack to clamp the seal strip;
• a needle dial mounted on the rack;
• a first clamping jaw, which picks sewing needle from the needle dial in sliding fit with the rack;
• a second clamping jaw, which cooperates with the first clamping jaw and pierces the seal strip with sewing needle by turns in sliding fit with the rack.