Company Filing History:
Years Active: 1984-1985
Title: Hirokazu Yasui: Innovator in Photocopying Technology
Introduction
Hirokazu Yasui is a notable inventor based in Kanagawa, Japan. He has made significant contributions to the field of photocopying technology, holding a total of 2 patents. His work focuses on enhancing the efficiency and effectiveness of photocopying machines.
Latest Patents
Yasui's latest patents include an "Automatic density control method for a photocopying machine." This invention involves a method for controlling the density of toner applied to the surface of a photosensitive drum. A small area of the drum is irradiated with light, and toner is applied to that area. A photo-transistor sensor then senses the density of the toner, comparing it to a reference signal indicative of optimal toner density. The difference signal is processed through a CPU to control both the bias voltage of the developing system and the speed of the toner motor. Another significant patent is the "Automatic exposure control for a photocopying machine." This method features a sensor that periodically samples the intensity of light produced by the photocopier's light source. The intensity is compared with a signal representing the optimum light intensity for the photosensitive drum, allowing for precise control of the light source.
Career Highlights
Hirokazu Yasui is associated with Fuji Xerox Co., Ltd., a leading company in the photocopying and printing industry. His innovative work has contributed to the advancement of photocopying technology, making processes more efficient and user-friendly.
Collaborations
Yasui has collaborated with notable coworkers, including Yuji Watai and Yoshiyuki Hirayama. Their combined efforts have led to advancements in the field and have helped in the development of new technologies.
Conclusion
Hirokazu Yasui's contributions to photocopying technology through his patents demonstrate his innovative spirit and dedication to improving efficiency in the industry. His work continues to influence the way photocopying machines operate today.