Key and keyboard

Details Key and keyboard Key and keyboard

1991-12-11

1993-06-29

Brunsman, David

Music

Instruments

General features

106177, 106178, 106180, 106196, 106204, 84433, 84452P, G10C 312

Patent

active

052236528

ABSTRACT:
A black key making of a resin composition comprising a cellulose derivative resin, silicon oxide and at least 0.3 part by weight of a carbon black based on 100 parts by weight of the cellulose derivative, the carbon black having a pH of 6 and below and a BET specific surface area of 260 m.sup.2 /g and above, a keyboard comprising white keys and above-described black keys and a musical instrument having the above-described keyboard are disclosed. The black key is excellent in productivity and processability and is hygroscopic and excellent in the touch to fingers during playing. The black key is preferably made by injection molding.

REFERENCES:
patent: 4840104 (1989-06-01), Ishida et al.
Hawley, Condensed Chemical Dictionary, Van Nostrand Reinhold, 1974, p. 168.
Hercules Cellulose Acetate, Hercules Powder Company, Wilmington, Del., 1943.

Affiliated with

Also associated with

Rating

Key and keyboard does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Key and keyboard, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Key and keyboard will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1757043