Company Filing History:
Years Active: 1990-1992
Title: Koichi Kumashiro: Innovator in Toner Composition and Dry Developer Technology
Introduction
Koichi Kumashiro is a notable inventor based in Kanagawa, Japan. He has made significant contributions to the field of electrophotographic processes, particularly in toner compositions and dry developers. With a total of 6 patents to his name, Kumashiro's work has had a substantial impact on the industry.
Latest Patents
Kumashiro's latest patents include innovative technologies that enhance the performance of toner compositions. One of his notable inventions is a toner composition that incorporates polyethylene and an inorganic external additive. This toner composition is designed for thermal fixing and includes a colorant, an external additive, and a binder resin that contains a thermoplastic resin with a specific glass transition point.
Another significant patent is for a dry developer that utilizes polyethylene powder. This dry developer is composed of a toner and a dispersion-type carrier made from resin and magnetic powder. The inclusion of polyethylene, characterized by its molecular weight and density, improves the fluidity and cleaning properties of the developer. It also enhances environmental stability and durability, effectively preventing the toner film phenomenon on photoreceptor or carrier surfaces.
Career Highlights
Kumashiro is currently employed at Fuji Xerox Co., Ltd., where he continues to innovate and develop new technologies in the field of printing and imaging. His work has been instrumental in advancing the capabilities of electrophotographic processes.
Collaborations
Throughout his career, Kumashiro has collaborated with esteemed colleagues such as Ikutaroh Nagatsuka and Takayoshi Aoki. These collaborations have fostered a creative environment that has led to the development of groundbreaking technologies.
Conclusion
Koichi Kumashiro's contributions to toner composition and dry developer technology exemplify his innovative spirit and dedication to advancing the field. His patents reflect a commitment to improving the efficiency and effectiveness of electrophotographic processes.