Patent ID: 8649726
Filing Date: 2014-02-11
Classification: G03G

Abstract:
1. A shutter device comprising: a main body including an annular body fitted around an outside of one end of a cylindrical tube having a discharge outlet at a part in a circumferential face near the one end in an axial direction, and a first opening and a second opening; and a seal member, wherein the main body is rotatable within a predetermined range between an open position and a close position, at the open position the first opening be opposed to the discharge outlet, and at the close position the first opening being away from the discharge outlet, the first opening has a same shape of the discharge outlet, the second opening is formed at a position not opposed to the discharge outlet during rotation within the predetermined range, includes a first opening end and a second opening end that are parallel to the axial direction, and has a length larger than the first opening, the seal member has a length equal to a distance from a vicinity of the first opening end on an outer circumferential face of the main body, passing across the first opening, the second opening end and the first opening on an inner circumferential face of the main body, to a vicinity of the second opening end in this order, the seal member includes a first hole and a second hole at two parts opposed to the first opening, the first hole and the second hole having at minimum a same shape as the first opening, and the seal member is attached to the outer circumferential face and the inner circumferential face of the main body, while being folded at the second opening end.