发明公开
EP0457619A3 Piano key covers formed of ivory substitute and pianos having same
失效
PIANO主要包括形成代理商和具有同类产品的PIANO
- 专利标题： Piano key covers formed of ivory substitute and pianos having same
- 专利标题（中）： PIANO主要包括形成代理商和具有同类产品的PIANO
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申请号： EP91304488.9申请日： 1991-05-17
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公开(公告)号： EP0457619A3公开(公告)日： 1992-05-20
- 发明人: Calabrese, Salvadore J. , Scarton, Henry A. , Murray, Frank S. , Ettles, Christopher M. , Kennedy, Warren C. , Dinc, Saim , Jlidi, Bessem , Strong, William Y.
- 申请人： STEINWAY MUSICAL PROPERTIES, INC. , RENSSELAER POLYTECHNIC INSTITUTE
- 申请人地址： 800 South Street Waltham, Massachusetts 02154-1439 US
- 专利权人： STEINWAY MUSICAL PROPERTIES, INC.,RENSSELAER POLYTECHNIC INSTITUTE
- 当前专利权人： STEINWAY MUSICAL PROPERTIES, INC.,RENSSELAER POLYTECHNIC INSTITUTE
- 当前专利权人地址： 800 South Street Waltham, Massachusetts 02154-1439 US
- 代理机构： Jump, Timothy John Simon
- 优先权： US525468 19900518
- 主分类号： G10C3/12
- IPC分类号： G10C3/12
摘要：
A piano key cover having a body of synthetic material pigmented to resemble natural ivory defines a top playing surface having a random orientation of peak-to-valley texture and a multiplicity of fine pores to replicate a surface of natural ivory. A multiplicity of the pores have diameters generally in the range of 0.0002 to 0.0012 inch (0.005 to 0.030 mm). The synthetic material is selected from the group consisting of acrylic polymer, polyurethane, epoxy and the like. A method for forming such a piano key cover and a piano having key covers of the invention are also described.
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