Process for producing ivorylike material for keys of musical instruments
AssigneeNippon Gakki Seizo Kabushiki Kaisha
InventorYutaka Oshima
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Abstract
In production of artificial material for keys of musical instruments from two or more sorts of casein compositions of different colors, an oriented sheet including linear bodies made of at least one sort of casein composition and arranged in a given orientation is subjected to heat pressing followed by folmalin hardening in order to develop flowing deep stripes and massy impression on the product very close to natural ivory.
Claims28
A process for producing ivorylike material for keys for musical instruments, comprising the steps of providing a first casein composition of a first color comprising a filler, coloring agent and water;
- providing a second casein composition having a second color different from the first color, said second casein composition comprising filler, coloring agent and water and being in the form of a sheet;
- extruding said first casein composition through a dye to form thin linear bodies on said sheet arranged in a predetermined orientation so as to simulate the surface of ivory;
- and heat pressing said oriented sheet so as to form a heat pressed oriented sheet;
- and impregnating said heat pressed oriented sheet with formalin for hardening.
A process for producing ivorylike material for keys of musical instrument, said process comprising the steps of preparing two or more casein compositions of different colors, each composition being prepared by mixing and kneading casein with filler, coloring agent and water;
- forming an oriented sheet including thin linear bodies of said casein compositions in alternate, side by side, bonded arrangement by concurrently extruding said casein compositions through a common die;
- heat pressing said oriented sheet substantially in its thickness direction to form a heat-pressed oriented sheet;
- and impregnating said heat-pressed oriented sheet with folmalin for hardening.
Dependencies are inferred from the claim text.