This inventor holds 33 USPTO granted patents, primarily in Electrophotographic Printing. Top assignees: Oki Data Corporation, Oki Electric Industry Co., Ltd., Mitsubishi Denki Kabushiki Kaisha. Active years: 1990-2006.
Company Filing History:
17 out of 1,875 
15 out of 4,980 
1 out of 21,351 
Years Active: 1990-2006
Areas of Expertise:
Title: **Shigeki Nakajima: Innovator in Electrophotographic Printer Technology**
Introduction
Shigeki Nakajima is a prominent inventor located in Tokyo, Japan, with an impressive portfolio of 33 patents. His contributions primarily focus on advancements in electrophotographic printers, showcasing his technical expertise and innovative mindset that have influenced the industry.
Latest Patents
Among Nakajima's latest inventions are two notable patents. The first is a **toner transporting method and mechanism employing a belt conveyor**. This invention features a toner-recycling transporting mechanism utilizing a belt conveyor that efficiently moves toner from the toner collection chamber, where it is gathered after being removed from the photosensitive drum, to a toner delivery chamber for returning to the printer’s developing unit. The design maintains the printer’s width, as the conveyor is ingeniously looped around roller shafts without any increase in overall dimensions. Additionally, the mechanism is developed for easy assembly and smooth operation without motion irregularities.
The second invention is the **image drum cartridge and developing unit having a movable developing roller**. This cartridge comprises supporting walls for the photoconductive drum and includes a position selector that allows a developing roller to rotate in relation to it. The invention ensures efficient toner application by forming a thin layer of toner on the developing roller. The position selector is designed to toggle the developing roller between operative and inoperative positions, optimizing its interaction with the photoconductive drum while maintaining a specific rotational axis.
Career Highlights
Shigeki Nakajima has held significant roles in notable companies, including Oki Data Corporation and Oki Electric Industry Co., Ltd. His work in these organizations has underscored his ability to develop practical solutions that cater to the evolving needs of technology in printing.
Collaborations
Throughout his career, Nakajima has collaborated with esteemed colleagues such as Yoshiharu Momiyama and Yukio Ota. These partnerships have strengthened his innovations and contributed to significant advancements in printer technology.
Conclusion
Shigeki Nakajima's extensive patent portfolio and collaborative efforts highlight his vital role in enhancing electrophotographic printing technology. His innovative spirit continues to inspire future developments in the industry, making him a notable figure in the realm of inventions.