发明名称 |
Method of producing multi-key structure for keyboard musical instruments |
摘要 |
There is disclosed a method of producing a multi-key structure for keyboard musical instruments. A molding material is filled in a mold to form a molded structure which has a proximal end portion and a plurality of juxtaposed key portions extending from the proximal end portion. Molding is carried out in a state that the respective adjacent key portions diverge toward their free ends. The molded structure is removed from the mold, and the proximal end portion is deformed in such a manner that the plurality of key portions are brought into parallel relation to one another to provide the multi-key structure.
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申请公布号 |
US4464325(A) |
申请公布日期 |
1984.08.07 |
申请号 |
US19820368802 |
申请日期 |
1982.04.14 |
申请人 |
NIPPON GAKKI SEIZO KABUSHIKI KAISHA |
发明人 |
KONDO, MASAO;KUMANO, SHINJI |
分类号 |
G10B3/12;B29C45/00;B29C45/14;B29C69/02;B29C70/68;G10C3/12;(IPC1-7):B29D3/00 |
主分类号 |
G10B3/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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