| 摘要 |
A magnetic cassette having an improved window design resulting from a molding operation. In the method, step portions for supporting at least part of a peripheral edge of a window portion in a direction of thickness of the cassette are formed respectively on a cassette half body and the window portion, and the cassette half body and the window portion are molded integrally with each other by multi-color molding. The primary molding is carried out in such a manner that an inclined portion is formed on an edge of the step portion of the primary resin defining part of a mold cavity for injection-molding a secondary resin and subsequently the secondary resin is injection-molded into the mold cavity, thereby integrally molding the cassette half. In the resulting cassette, the cassette half body and a window portion have respective step portions for supporting at least part of a peripheral edge of the window portion in a direction of a thickness of the cassette, and the cassette half body and the window portion are molded integrally with each other by multi-color molding. An inclined portion is formed on an edge of the step portion of the primary resin.
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