Takeaki Ohuchi

Title: Takeaki Ohuchi: Innovator in Electrophotographic Toner Technologies

Introduction

Takeaki Ohuchi is a prominent inventor based in Shiki-gun, Japan, known for his significant contributions to the field of electrophotographic toner technologies. With a total of three patents to his name, Ohuchi's innovations are pivotal for enhancing the performance and quality of toners used in various imaging processes.

Latest Patents

Among Takeaki Ohuchi's latest patents, one notable invention focuses on a unique toner used for electrophotography. This toner comprises a binder resin, wax particles, and a coloring agent, with a specific design for the wax particles. The ratio of the major axis to the minor axis of the wax particles is engineered to be within 1.4 to 4.0, with the major axis not exceeding 6.0 micrometers. Additionally, the melt index of the binder resin ranges from 5.0 to 11.0, coupled with a dielectric loss tangent not surpassing 5.0. This innovative formulation prevents wax particles from protruding or adhering to the surface of the toner. As a result, it enhances offset-reducing properties during the fixing process and minimizes wax contamination on the toner-bearing body.

Another significant patent relates to the electrophotographic toner and its method of manufacturing. This invention describes toner particles composed of irregularly-shaped core particles, mainly made of binder resin, along with surface-modifying fine particles. These fine particles are initially dispersed over the core particles and then affixed, forming a stable film. The specific surface area of these toner particles is carefully controlled, allowing them to avoid common issues such as filming, toner scattering, and fogging that are often caused by peeling or segregation of the surface-modifying particles.

Career Highlights

Currently, Takeaki Ohuchi is affiliated with Sharp Corporation, where he continues to push the boundaries of toner technology. His work is integral to the advancements in imaging technology, ensuring higher quality output and more efficient production processes.

Collaborations

Throughout his career, Ohuchi has collaborated with notable coworkers such as Yasuharu Morinishi and Satoshi Ogawa. Together, they have contributed to the refinement and enhancement of electrophotographic technologies, fostering an environment of innovation at their organization.

Conclusion

Takeaki Ohuchi's inventive spirit and meticulous approach to developing electrophotographic toner have greatly impacted the industry. His patents not only advance the technology but also set standards for future research and innovation in the field, showcasing his importance as a leading inventor in Japan.