| 摘要 |
PROBLEM TO BE SOLVED: To improve a use feeling at the time of using as a pillow by forming a ring shape, wherein open hems of a bottom side and top side of a pair of face fabric halves are sewn together and an elastic material is filled inside, and a maximum length and a minimum length of a generatrix of a general cone surface placing a head of one of the face fabric halves are roughly in a symmetrical position and one part thereof continues a specified length circumferentially. SOLUTION: A cushion 10 is formed by folding two skin fabric halves 12 in a middle of each top side and bottom side, wherein an extending line through peripheral edges of the bottom side and top side is folded in a middle of a generatrix through an apex of a cone. The akin fabric halves 12 are formed into a ring ridge shape or a ring groove shape. Outer peripheries of both skin fabric halves 12 are sewn together, and inner peripheries are also sewn together excluding a part thereof. At this time, both face fabric halves 12 are positioned so that each of maximum generatrix parts and each of minimum generatrix parts corresponding to a maximum and a minimum diameters M and m respectively are opposite, and one part extends circumferentially in a specified length.
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