Location History:
- Sakai, JP (1980 - 2004)
- Osaka, JP (2015)
Company Filing History:
Years Active: 1980-2015
Title: Innovations of Shinji Tsujio
Introduction
Shinji Tsujio is a notable inventor based in Sakai, Japan. He has made significant contributions to the field of writing instruments and erasers, holding a total of seven patents. His innovative designs focus on enhancing the functionality and usability of everyday products.
Latest Patents
Among his latest patents, Tsujio has developed a plastic eraser that utilizes a vinyl chloride resin as a base. This eraser incorporates a unique combination of plasticizers, including 4,5-epoxy-1,2-cyclohexanedicarboxylic acid bis(2-ethylhexyl) and diethylene glycol dibenzoate. The formulation allows for a hardness range of 55-75 and a gel hardness of 3.0-6.0 kgf, making it an effective tool for erasing. Additionally, he has created an erasable ink and water-based ballpoint pen that features an aqueous ink composition designed for easy erasure, even after applying significant writing pressure. This ink composition is characterized by specific particle size distributions, ensuring optimal performance.
Career Highlights
Shinji Tsujio is currently employed at Sakura Color Products Corporation, a company renowned for its high-quality writing instruments and art supplies. His work at Sakura has allowed him to focus on developing innovative products that meet the needs of consumers.
Collaborations
Tsujio collaborates with Hidetoshi Fukuo, a fellow innovator in the field. Their partnership has contributed to the advancement of product designs and the development of new technologies in writing instruments.
Conclusion
Shinji Tsujio's contributions to the field of writing instruments and erasers highlight his innovative spirit and dedication to improving everyday products. His patents reflect a commitment to quality and functionality, making a lasting impact in the industry.