Kotaro Ikeda

Title: Kotaro Ikeda: Inventor of an Improved Electro-Acoustic Diaphragm

Introduction

Kotaro Ikeda is an inventor associated with Ashiya, Japan, and Kuraray Co., Ltd. His patent work focuses on materials for electro-acoustic transducers.

Latest Patents

Ikeda is credited with 1 patent, titled “Diaphragm for an Electro-Acoustic Transducer.” The invention describes a diaphragm sheet made from a mixture of polymer and mica. It specifies 30 to 95 percent by weight of a polymer selected from polyolefins, polyesters, and polyamides, along with 5 to 70 percent by weight of mica. The mica has a weight-average flake diameter no greater than 500 microns and a weight-average aspect ratio of at least 10. According to the patent description, adding mica in this specified form substantially improves the sheet’s dynamic modulus while leaving its loss tangent substantially unchanged.

Career Highlights

Ikeda’s documented patent contribution concerns the composition and performance of diaphragm materials used in electro-acoustic transducers. His work connects polymer selection and mica characteristics with the mechanical properties of the resulting sheet.

Collaborations

Kiyonobu Fujii and Koichi Saito are identified as Ikeda’s coworkers. The available information does not specify their roles in the patent or their particular contributions.

Conclusion

Kotaro Ikeda’s recorded invention applies a carefully defined polymer-and-mica composition to improve the dynamic modulus of electro-acoustic transducer diaphragms while maintaining a substantially unchanged loss tangent.