# US 2014/0150626 A1 · Musical instrument string and process for the production thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0150626 A1 - Document ID: US20140150626A1 - Status: Published application - Kind: A1 - Application number: 14/084,948 - Filed: 2013-11-20 - Published: 2014-06-05 - Earliest claimed: 2012-11-30 - Assignees: Feindrahtwerk Adolf Edelhoff GmbH & Co. KG - Applicants: Feindrahtwerk Adolf Edelhoff GmbH & Co. KG - Inventors: Ingo JOLK; Mathias FIOLKA; Gerhard BÜRSTNER; Jörg LIEDEMANN - Web page: https://patentgrep.com/patent/US20140150626A1 ## CPC - G10D 3/10: Strings - G10D: STRINGED MUSICAL INSTRUMENTS; WIND MUSICAL INSTRUMENTS; ACCORDIONS OR CONCERTINAS; PERCUSSION MUSICAL INSTRUMENTS; AEOLIAN HARPS; SINGING-FLAME MUSICAL INSTRUMENTS; MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR (organs, harmoniums or similar wind musical instruments with associated blowing apparatus G10B; pianos, harpsichords, spinets or similar stringed musical instruments with one or more keyboards G10C; automatic musical instruments G10F; electrophonic musical instruments in which tones are generated by electromechanical means G10H) ## Abstract The invention relates in particular to a musical instrument string. The musical instrument string comprises a core, produced from a metal material, with a coating. The coating comprises an intermediate layer made of nickel or a nickel alloy applied to the core and a sheathing layer made of tin or a tin alloy applied to the intermediate layer. ## Claims ### Claim 1 A musical instrument string comprising a core, produced from a metal material, with a coating which comprises an intermediate layer made of nickel or a nickel alloy applied to the core and a sheathing layer made of tin or a tin alloy applied to the intermediate layer. ### Claim 2 (depends on 1) The musical instrument string according to claim 1, wherein the intermediate layer has a layer thickness of between 0.2 μm and 5 μm. ### Claim 3 (depends on 1) The musical instrument string according to claim 1, wherein the intermediate layer has a layer thickness of between 0.5 μm and 2 μm. ### Claim 4 (depends on 1) The musical instrument string according to claim 1, wherein the intermediate layer has a layer thickness of approximately 1 μm. ### Claim 5 (depends on 1) The musical instrument string according to claim 1, wherein the sheathing layer has a layer thickness of between 0.2 μm and 6 μm. ### Claim 6 (depends on 1) The musical instrument string according to claim 1, wherein the sheathing layer has a layer thickness of between 0.5 μm and 4 μm. ### Claim 7 (depends on 1) The musical instrument string according to claim 1, wherein the sheathing layer has a layer thickness of approximately 1 μm. ### Claim 8 (depends on 1) The musical instrument string according to claim 1, wherein the sheathing layer is a multiple layer. ### Claim 9 (depends on 8) The musical instrument string according to claim 8, wherein said multiple layer is a double layer. ### Claim 10 (depends on 8) The musical instrument string according to claim 8, wherein each partial layer of the multiple layer is produced from tin or a tin alloy. ### Claim 11 (depends on 1) The musical instrument string according to claim 1, wherein the coating is embodied in such a manner that the musical instrument string does not exhibit any corrosion-induced discolourations in a corrosion protection test. ### Claim 12 (depends on 11) The musical instrument string according to claim 11, wherein said corrosion protection test uses a moist, sulphur-containing atmosphere, with 10-fold magnification. ### Claim 13 (depends on 1) A process for producing a musical instrument string according to claim 1, comprising: providing a core produced from a metal material, coating the core with an intermediate layer made of nickel or a nickel alloy; and coating the intermediate layer with a sheathing layer made of tin or a tin alloy. ### Claim 14 (depends on 13) The process according to claim 13, wherein said core is produced from an iron material. ### Claim 15 (depends on 13) The process according to claim 13, wherein the intermediate layer is applied to the core in a chemical or electrochemical process, and wherein the material of the sheathing layer is applied to the intermediate layer in a chemical or electrochemical process or in a molten state. ### Claim 16 (depends on 6) The process according to claim 6, wherein the sheathing layer is produced as a multiple layer by depositing a plurality of partial layers each made of tin or a tin alloy in succession. ### Claim 17 (depends on 16) The process according to claim 16, wherein said plurality of partial layers comprises two layers. ### Claim 18 (depends on 6) The process according to claim 6, wherein at least the sheathing layer is subjected to a heat treatment. ### Claim 19 (depends on 18) The process according to claim 18, wherein said heat treatment comprises heating the sheathing layer to a temperature of 100° C. to 400° C., for a period of time of 10 ms to 10 s. ### Claim 20 (depends on 6) The process according to claim 6, wherein the coating is applied in such a manner that, in a corrosion test and with 10-fold magnification, it does not exhibit any corrosion-induced discolourations by the coating or the cores.