Location History:
- Osaka, JP (1983 - 1984)
- Shiga, JP (1990)
Company Filing History:
3 out of 1,252 
1 out of 877 Years Active: 1983-1990
Title: Hirozo Funaki: Innovator in Electrophotography Toners
Introduction
Hirozo Funaki is a notable inventor based in Osaka, Japan. He has made significant contributions to the field of electrophotography, particularly in the development of innovative toners. With a total of 3 patents to his name, Funaki's work has had a lasting impact on the industry.
Latest Patents
One of Funaki's latest patents is focused on toners for electrophotography. This invention relates to toners wherein the main resin component comprises both a lower molecular weight polymer and a higher molecular weight polymer, each differing from the other. The higher molecular weight polymer has a glass transition point of at least 50°C, while the lower molecular weight polymer has a glass transition point no higher than 65°C. The polymers used in this invention include styrene polymers, acrylic polymers, and styrene-acrylic copolymers. Typically, the lower molecular weight polymer has a weight average molecular weight of 50,000 or less, and the higher molecular weight polymer has a weight average molecular weight of 80,000 or more.
Another significant patent by Funaki involves a toner for developing electrostatic latent images. This toner contains a colorant and a resin, where the resin includes at least one specific type of polymer with a Mw/Mn ratio ranging from 3.5 to 40. The Mn value for this polymer is between 2,000 and 30,000, showcasing Funaki's innovative approach to toner formulation.
Career Highlights
Throughout his career, Hirozo Funaki has worked with prominent companies such as Konishiroku Photo Industry Co., Ltd. and Sekisui Chemical Co., Ltd. His experience in these organizations has contributed to his expertise in the field of electrophotography.
Collaborations
Funaki has collaborated with notable coworkers, including Makoto Tomono and Yasuyuki Fujisaki. Their combined efforts have further advanced the development of innovative toners and related technologies.
Conclusion
Hirozo Funaki's contributions to the field of electrophotography through his patents and collaborations highlight his role as a significant innovator. His work continues to influence the industry, paving the way for future advancements in toner technology.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.