Location History:
- Kawasaki, JP (1986)
- Kanagawa, JP (1989)
Company Filing History:
Years Active: 1986-1989
Title: Innovator Spotlight: Toyoji Ishikawa
Introduction
Toyoji Ishikawa is a notable inventor based in Kawasaki, Japan, recognized for his contributions to the field of electrophotographic technology. With a total of two patents credited to him, Ishikawa’s work showcases ingenuity and technical prowess in imaging devices.
Latest Patents
His first recent patent is an "Image Developing Device." This device is designed for use in electrophotographic copying apparatuses or printers, featuring a developing roller that supplies toner to a latent image on a latent image carrier. This process transforms the latent image into a visible toner image. Key to its operation, the device also incorporates a toner supply roller that is independently rotatable and abuts the developing roller, allowing for efficient toner application. Both rollers are electrically conductive, and an electric potential is applied between them to optimize the loading of toner depending on its charge.
The second patent, a "Dual-Color Copier," presents an innovative approach to color copying. It includes a first photosensitive drum featuring a dual-layer of photoconductive materials responsive to different colors of light. Simultaneously, a second photosensitive drum is utilized, allowing light images from the same original document to create electrostatic latent images on both drums. Each of these images can then be developed using differently colored toner, enabling the production of dual-color copy images on a single sheet of transfer paper.
Career Highlights
Ishikawa has made significant strides during his tenure at Ricoh Company, Ltd. His inventive methodologies not only reflect a deep understanding of photographic processes but also contribute to enhancing the efficiency and quality of printing technologies. His dedication to innovation continues to influence the industry positively.
Collaborations
In his pursuit of technological advancements, Ishikawa has collaborated with fellow inventors Toshio Kaneko and Shuichi Endo. Their joint efforts underscore the importance of teamwork and shared expertise in fostering innovation within the competitive landscape of imaging technologies.
Conclusion
Toyoji Ishikawa's inventive contributions, particularly in the realm of electrophotographic devices and dual-color copying technology, highlight the role of dedicated inventors in shaping the future of printing solutions. His accomplishments stand as a testament to the innovative spirit within industries and the power of collaborative efforts in driving technological progress.