# US 12,112,727 B2 · Stringed musical instrument string and method for manufacturing stringed musical instrument string

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- Number: US 12,112,727 B2
- Document ID: US12112727B2
- Status: Granted
- Kind: B2
- Application number: 18/562,778
- Filed: 2022-04-21
- Published: 2024-08-08
- Granted: 2024-10-08
- Earliest claimed: 2021-06-30
- Assignees: Yamada Atomizer Co., Ltd.
- Applicants: Yamada Atomizer Co., Ltd.
- Inventors: Masaaki Yamada
- Web page: https://patentgrep.com/patent/US12112727B2

## CPC

- G10D 3/10: Strings
- G10D 3/22: Material for manufacturing stringed musical instruments; Treatment of the material
- 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

A stringed musical instrument string 1 of the present invention has a configuration in which a wire rod W including a synthetic resin as a constituent material is wound in a coil shape at a normal time, and is stretched over a target stringed musical instrument in a state of being unwound from the coil shape when used. With such a configuration, the stringed musical instrument string 1 can reproduce an excellent timbre close to the timbre of a natural gut string at low cost by the wire rod W including a synthetic resin as a constituent material and has various characteristics (for example, no negative aspect even when the tension is weak, high volume, stable string even immediately after stretched, and accurate pitch) as the stringed musical instrument string 1.

## Claims

### Claim 1

A stringed musical instrument string comprising:
a wire rod containing a synthetic resin and having an outer diameter d of 0.3 to 1.2 mm, wherein
the stringed musical instrument string has a shape wound in a coil shape and having an internal space, and
the stringed musical instrument string is used in a state in which it is unwound from a coiled state.

### Claim 2 (depends on 1)

The stringed musical instrument string according to claim 1, wherein
the synthetic resin is at least one selected from a group consisting of a polyvinylidene fluoride-based resin and a polyamide-based resin.

### Claim 3 (depends on 1)

The stringed musical instrument string according to claim 1, wherein
the shape wound in the coil shape has a winding diameter D of 0.8 to 4.0 mm, and
a number of turns (number of coils) t per 1 m is 130 to 520 times/m.

### Claim 4 (depends on 1)

The stringed musical instrument string according to claim 1, wherein
the stringed musical instrument string is a string for a ukulele or a string for a guitar.

### Claim 5 (depends on 1)

A method for manufacturing a stringed musical instrument string according to claim 1, comprising:
fixing one end of a wire rod containing a synthetic resin and having an outer diameter d of 0.3 to 1.2 mm, and twisting another end of the wire rod with respect to a length direction to form a shape of the wire rod wound in a coil shape.

### Claim 6 (depends on 5)

The method for manufacturing a stringed musical instrument string according to claim 5, wherein
the synthetic resin is at least one selected from a group consisting of a polyvinylidene fluoride-based resin and a polyamide-based resin.

### Claim 7 (depends on 5)

The method for manufacturing a stringed musical instrument string according to claim 5, wherein
the wire rod is formed into the shape wound in the coil shape at a number of rotations of 600 rotations/m or more.

### Claim 8 (depends on 5)

The method for manufacturing a stringed musical instrument string according to claim 5, wherein
the wire rod having the shape wound in the coil shape is irradiated with a γ ray.