Patent ID: 7987891

Claim:
A triple layer folding door, comprising: an inner layer door having a left end portion and a right end portion, an outer layer door having a left end portion and a right end portion, a middle layer door having a left end portion and a right end portion, provided between the inner layer door and the outer layer door, and a sliding arrangement, which comprises: two pulleys having a left pulley mounted on a left end portion of the middle layer door and a right pulley mounted on a right end portion of the middle layer door, two belts, having a left belt winding on the left pulley, wherein a first end of the left belt extending to the right end portion of the inner layer door from the left pulley and a second end of the left belt extending to the right end portion of the outer layer door from the left pulley, and a right belt winding on the right pulley, wherein a first end of the right belt extending to the left end portion of the inner layer door from the right pulley and a second end of the right belt extending to the left end portion of the outer layer door from the right pulley; wherein the movement of the inner door and the movement of the outer door are both able to bring the middle door move, and thereby the inner door, middle door and the outer door are all able to move together toward the right or left to be unfolded.