Location History:
- Asaka, JP (1982 - 1983)
- Saitama, JP (1984)
- Kanagawa, JP (1986 - 1996)
Company Filing History:
Years Active: 1982-1996
Title: Shu Watarai: Innovator in Electrostatic Photography
Introduction
Shu Watarai is a prominent inventor based in Kanagawa, Japan. He has made significant contributions to the field of electrostatic photography, holding a total of 8 patents. His innovative work has advanced the technology used in liquid developers, enhancing the quality and efficiency of electrostatic imaging.
Latest Patents
Watarai's latest patents include a liquid developer for electrostatic photography that comprises resin grains dispersed in a non-aqueous solvent. This developer has a volume specific resistivity of at least 109 Ω.cm. The resin grains are created by polymerizing specific monomers, resulting in a product that exhibits excellent dispersion stability. This innovation allows for the formation of toner images with high resistivity to etching solutions, which is crucial for quality in electrostatic photography.
Another notable patent involves a similar liquid developer, which also consists of resin grains dispersed in a non-aqueous solvent. This formulation includes monomers that are soluble in the solvent but become insoluble upon polymerization. The presence of a dispersion stabilizing resin enhances the overall performance of the developer, making it a valuable asset in the field.
Career Highlights
Watarai has spent a significant part of his career at Fuji Photo Film Company, Limited. His work has not only contributed to the company's advancements but has also positioned him as a key figure in the development of electrostatic photography technologies.
Collaborations
Throughout his career, Watarai has collaborated with notable colleagues such as Seiji Horie and Nobuo Suzuki. These partnerships have fostered innovation and have been instrumental in the development of his patented technologies.
Conclusion
Shu Watarai's contributions to the field of electrostatic photography through his patents and collaborations highlight his role as an influential inventor. His work continues to impact the industry, paving the way for future advancements in imaging technology.