Patent ID: 8177797

Claim:
A tubular suture reinforcement material for an automatic suturing device, wherein the tubular suture reinforcement material is formed by stacking two sheet-like materials and sewing together both ends of the two sheet-like materials using two chain stitches, wherein said chain stitches comprise a plurality of loops in which one of said loops passes through an adjacent loop in a direction away from a sewing end, thereby providing intralooping stitches, wherein, at the sewing end, a loop next to the sewing end does not pass through another loop anterior to the loop next to the sewing end, and wherein a thread end at the sewing end passes through the loop next to the sewing end, which is continuous to the thread end, thereby preventing the thread from unraveling without tying a knot at the sewing end and is returned to the sewing end after passing through the loop next to the sewing end.