Shigeo Aonuma

Title: Shigeo Aonuma: Innovator in Electrophotographic Development

Introduction

Shigeo Aonuma is a prominent inventor based in Kanagawa, Japan. He has made significant contributions to the field of electrophotography, holding a total of seven patents. His work has greatly influenced the development of imaging technologies.

Latest Patents

Aonuma's latest patents include an electrophotographic developer containing tin oxide. This developer comprises toner particles and fine particles of tin oxide, which have an electrical resistivity ranging from 10² to 10⁹ Ω.cm. The developer ensures efficient image transfer and exhibits excellent developing ability. Another notable patent is for a two-component electrophotographic developer. This system includes a positive charging toner and a negative charging carrier made of dispersed magnetic powder. The positive charging toner has hydrophilic alumina particles adhered to its surface, while the negative charging carrier has a volume average particle diameter of 30 to 80 μm. This developer reduces toner cloud during development processing and produces toner images free from fog.

Career Highlights

Throughout his career, Aonuma has worked with notable companies such as Fuji Xerox Co., Ltd. and Fuji Photo Film Company, Limited. His expertise in electrophotographic technology has been instrumental in advancing imaging solutions.

Collaborations

Aonuma has collaborated with esteemed colleagues, including Koichi Tanaka and Yoshimi Amagai. Their combined efforts have contributed to the innovation and refinement of electrophotographic technologies.

Conclusion

Shigeo Aonuma's contributions to electrophotography through his patents and collaborations have significantly impacted the industry. His work continues to influence advancements in imaging technology.