Seiji Hanaoka

Title: Seiji Hanaoka: Innovator in Ink Jet Printing Technology

Introduction

Seiji Hanaoka is a notable inventor based in Shiojiri, Japan, recognized for his contributions to ink jet printing technology. With a total of seven patents to his name, Hanaoka has made significant advancements in the field, particularly in the mechanisms that drive ink jet printer heads.

Latest Patents

Hanaoka's latest patents include a method and apparatus for driving an ink jet printer head. This innovative approach involves applying a predetermined voltage to an electromechanical conversion device, which displaces the wall of an ink pressure chamber inwardly. This action decreases the volume of the pressure chamber without ejecting ink from the nozzle. Once the voltage is removed, the wall of the pressure chamber is restored by the elastic energy stored in the wall and the electro-mechanical conversion means, allowing ink to be drawn into the chamber from an ink reservoir. The voltage is then reapplied in synchronism with a damped oscillation system, resulting in the ejection of an ink droplet from the nozzle.

Another significant patent is for a dot printer featuring concentric driving cams. This miniature printer utilizes these cams to provide both horizontal and vertical motions, synchronizing the reciprocating action of the printing head mechanism with the paper feed and ink ribbon feed mechanism. The design ensures constant velocity linear motion for the print head, allowing the printing paper to be removed in either direction from the printer.

Career Highlights

Throughout his career, Seiji Hanaoka has worked with prominent companies such as Kabushiki Kaisha Suwa Seikosha and Shinshu Seiki Kabushiki Kaisha. His experience in these organizations has contributed to his expertise in the field of printing technology.

Collaborations

Hanaoka has collaborated with notable individuals in the industry, including Masahiko Mori and Takao Kobayashi. These partnerships have likely enhanced his innovative capabilities and contributed to the development of his patents.

Conclusion

Seiji Hanaoka's work in ink jet printing technology showcases his inventive spirit and dedication to advancing the field. His patents reflect a deep understanding of the mechanics involved in printing, making him a significant figure in the industry.