Key structure

Details Key structure Key structure

2006-03-20

2008-07-01

Lockett, Kimberly (Department: 2837)

Music

Instruments

Stringed

C084S433000

Reexamination Certificate

active

07394004

ABSTRACT:
A key structure includes a top plate which is formed by laminating a half-transparent resin surface layer member on a resin bottom side member using two-color injection molding, and the top plate is secured on a wooden key base. A plurality of concave grooves and protrusions, and a plurality of protrusion and troughs are respectively formed together in straight lines in the long direction of the key structure on a rear face of the surface layer member and a top face of the rear side member. Outside light is reflected from the top ends of the protrusion and the troughs, whereby a faint and natural vertically-striped pattern, which corresponds to a concave-convex part formed by the concave grooves and the protrusions, is perceived as resembling an edge grain of ivory.

REFERENCES:
patent: 4346639 (1982-08-01), Vagias
patent: 5509344 (1996-04-01), Calabrese et al.
patent: 5515763 (1996-05-01), Vandervoort
patent: 6133518 (2000-10-01), Kamimura et al.
patent: 0 465 356 (1992-01-01), None
patent: 8-179756 (1996-07-01), None
patent: 2000-276161 (2000-10-01), None
European Search Report dated May 23, 2006.

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