Patent ID: 7290581

Claim:
A half spread folding door comprising: plural door leaves having a predetermined width and length; a first hinge comprising: a hinge shaft, a first hinge cylinder and a second hinge cylinder, for connecting successively each door leaf with adjacent door leaves along its width direction; a pair of said first hinges, each mounted lengthwise in side ends of each door leaf; wherein the first hinge cylinder is established at one side end of the door leaf and enabling the hinge shaft to go through, and having a first notch at a lower portion of the first hinge cylinder, the first notch having a form of a cut-off in a predetermined angle around an axis of the first hinge cylinder; and wherein the second hinge cylinder is established at an adjacent side end of the adjacent door leaf to the door leaf and enabling the hinge shaft to go through, and having a second notch at an upper portion of the second hinge cylinder, the second notch having a form of a cut-off in a predetermined angle around an axis of the second hinge cylinder, the angle being the same as one of the first notch, but overlapping in only certain value; plural second hinges having first and second hinge cylinders mounted lengthwise in the middle of adjacent door leaves, allowing each door leaf to be rotated around the hinge shaft correlatively, and for folding each door leaf toward alternative dead end of the door leaves sequentially; a spread confining mans for limiting relative rotation angles of every door leaf interconnected by the hinge means; and a stopper attached on a circumference of the hinge shaft to nest in the overlap portion, restricting the rotation of each door leaf coupled with the hinge shaft.