| 摘要 |
PROBLEM TO BE SOLVED: To obtain an original sheet for forming a printing plate in which the durability of a part held by a positioning pin is improved so as to prevent positional accuracy from being deteriorated and whose parts can be easily exchanged in an original sheet held on a specified position by the fitting of the positional pin. SOLUTION: The lower end part of a cover sheet 14 is interposed between a pair of metal boards 22 and 24 constituting a positioning metal fitting 20, the sheet 14 is connected by a screw 23 in an interposed condition, and integrally assembled. Thus, the fixing positions of the boards 22 and 24 are not deviated, so that the durability is improved. A hard metal bush 28 is provided on the positioning holes 20A and 20B of the respective boards 22 and 24, and the bush 28 is hardly worn, and the holes can be used by only the exchange of the bush 28 even in the case the bush 28 is worn. |
