| 摘要 |
PROBLEM TO BE SOLVED: To accurately measure a distance from one fiber triangle through the free end of a front tip to the other fiber triangle by one obturator for all the front tip shapes of the equal length in a horizontal direction. SOLUTION: A gage plate G is composed of a base plate 3 and a slide plate 4 and the length in a front-to-back direction of the gage plate G is freely adjusted by sliding the slide plate 4 in front and back directions. Thus, when the gage plate G corresponding to the interval of the fiber triangles T1 and T2 of a mitrak value 20, that is the horizontal direction length is prepared, the front end outer peripheral edge 9 of the base plate 3 is abutted to the left and right fiber triangles T1 and T2 at the root part of the front tip 20F, the slide plate 4 is slid and the rear end outer peripheral edge 10 is matched with the free edge 20e of the front tip 20F, the length from a position P1 corresponding to one fiber triangle T1 of the gage plate G through the side of the rear end outer peripheral edge 10 to the position P2 corresponding to the other fiber triangle is turned to the optimum length of an artificial valve ring formation material. |
