Method of producing multi-key structure for keyboard musical ins

Details Method of producing multi-key structure for keyboard musical ins Method of producing multi-key structure for keyboard musical ins

1982-04-14

1984-08-07

Lowe, James B.

Plastic and nonmetallic article shaping or treating: processes

Prestressing solid body and uniting in stressed condition

29700, 84433, 84438, 264250, 264251, 264275, 2642791, 2643281, 264334, 264339, B29D 300

Patent

active

044643250

ABSTRACT:
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.

REFERENCES:
patent: 4317012 (1982-02-01), Itoh
patent: 4318879 (1982-03-01), Gortner
patent: 4395817 (1983-09-01), Asada et al.

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