Location History:
- Kanagawa, JP (1993)
- Yokohama, JP (1990 - 1996)
- Machida, JP (1995 - 2002)
- Tokyo, JP (2005 - 2007)
Company Filing History:
Years Active: 1990-2007
Title: Hiroshi Yusa: Innovator in Toner Technology
Introduction
Hiroshi Yusa is a prominent inventor based in Yokohama, Japan. With an impressive portfolio of 36 patents, Yusa has made significant contributions to the field of toner technology. His innovations focus on enhancing the performance and efficiency of printing materials, making him a valuable asset in the industry.
Latest Patents
One of Yusa's latest patents revolves around a novel toner formulation. This toner consists of a binder resin primarily made from a polyester resin, complemented by a wax and a colorant. The invention details the specific parameters for measuring the toner’s wettability using a mixed solvent of methanol and water, demonstrating effectiveness at various concentrations. It highlights a melt index within the range of 0.1 to 10 g/10 min at 125°C under a 5 kg load. Furthermore, the toner includes a resin component that is insoluble in tetrahydrofuran, making up between 5 to 40% of the binder resin mass. Notably, the THF soluble component showcases a main peak in the molecular weight region of 3,000 to 20,000. This innovation addresses image density stability in high-temperature and high-humidity environments, while also enhancing fixing properties and managing end-offset occurrences.
Career Highlights
Hiroshi Yusa has dedicated his career to advancing printing technology through his role at Canon Kabushiki Kaisha. His substantial work in toner innovations has positioned him as a key figure in the development of high-performance printing materials.
Collaborations
Throughout his career, Yusa has collaborated with other experts in the field, including Koichi Tomiyama and Tsutomu Kukimoto. These partnerships have enabled him to further refine his inventions and bring innovative products to the market.
Conclusion
Hiroshi Yusa stands out as an influential inventor in toner technology. His extensive patent portfolio and ongoing research efforts contribute to the advancement of printing solutions, reinforcing his key role at Canon. With continued innovation, Yusa is set to make further strides in enhancing the quality and reliability of printed materials.