Kohji Tsurui

Title: **Inventor Kohji Tsurui: Pioneering Ink Jet Technology**

Introduction

Kohji Tsurui, an innovative inventor based in Sakurai, Japan, has made significant contributions to the field of inkjet technology. With a remarkable portfolio consisting of 10 patents, he has played a vital role in enhancing the efficiency and functionality of inkjet printers.

Latest Patents

Among his most notable inventions is an ink jet printer head that features a plurality of nozzles and two distinct groups of filters. This innovative inkjet print head is designed to ensure that ink droplets ejected from all orifices maintain a uniform size. It utilizes a unique structure where each ink chamber, separated by partitions, connects to a common pressure chamber with a first filter in place. This chamber is linked to a common ink feed path via a second filter. The design incorporates a pressure chamber ceiling with a piezo vibrator positioned over the common pressure chamber, enhancing its functionality. A movable wall that deforms to increase volume is present for each partition. When activated, the piezo vibrator generates a pressure wave that travels to each ink chamber through the first filter, allowing for precise ink droplet ejection. Conversely, when the movable wall is deformed, the pressure wave is absorbed, preventing droplet ejection.

Another significant invention by Tsurui is an ink jet head allowing for a highly dense arrangement of nozzles. This design integrates an ink supply path, a pressure chamber, an orifice, and an oscillator, facilitating ink emission through the bending of the pressure chamber's wall surface by the oscillator's oscillation. In this design, a portion of the wall surface of the pressure chamber is formed by an oscillating plate made of resin, complemented by a unimorph that includes both an elastic plate and an oscillator.

Career Highlights

Kohji Tsurui currently works with Sharp Kabushiki Kaisha Corporation, where he continues to push the boundaries of inkjet technology. His inventions have not only contributed to the advancement of printing technologies but have also set standards for future developments in the industry.

Collaborations

Throughout his career, Tsurui has collaborated with notable colleagues, including Hisashi Yoshimura and Hajime Horinaka. These partnerships have facilitated an exchange of ideas that further enhance the innovation process within their projects.

Conclusion

Kohji Tsurui's contributions to ink jet technology exemplify the spirit of innovation and dedication to quality that is essential in the field of inventions. With his extensive patent portfolio and collaborative efforts, he continues to inspire and pave the way for future advancements in printing technologies.