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.
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
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