Thermoplastic key face for pianos or the like

Details Thermoplastic key face for pianos or the like Thermoplastic key face for pianos or the like

1981-07-27

1982-08-31

Franklin, Lawrence R.

Music

Instruments

General features

84452P, G10C 312

Patent

active

043466397

ABSTRACT:
A key cover plate for a piano or the like is injection-molded thermoplastic material marbleized by incomplete mixing of a color agent. The cover plate simulates the grain of natural ivory and has a Munsell hue of between 4.5Y to 8.8Y to 6.6YR. The cover plate also has a Munsell chroma of between 1.0 to 2.6 and a Munsell value of between 8.3 to 9.3. A contrast ratio of the plastic ivory material is between 70 to 90.

REFERENCES:
patent: 3032455 (1962-05-01), Fauser
patent: 3187619 (1965-06-01), Andersen
patent: 3330176 (1967-07-01), Schwartz et al.
patent: 3417649 (1968-12-01), Wood
patent: 3561315 (1971-02-01), Ohno
patent: 3855894 (1974-12-01), Thomas et al.
patent: 4205583 (1980-06-01), Absmann

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