Vaughan Louis Dewar

Title: Vaughan Louis Dewar: Innovator in Ink Jet Printing Technology

Introduction

Vaughan Louis Dewar is a notable inventor based in Bartlett, TN (US). He has made significant contributions to the field of ink jet printing technology, holding a total of 2 patents. His innovative designs focus on enhancing the efficiency and quality of printing processes.

Latest Patents

Dewar's latest patents include a heated drum for ink jet printing and a method and apparatus using two different black inks to reduce intercolor bleeding. The heated drum patent describes an ink jet printing system that utilizes a heated rotary printing drum to carry paper for high-speed printing. This system prevents smudging by achieving printing and drying before transferring the sheet from the drum. It can produce dried prints that can be immediately stacked and handled, achieving speeds exceeding 10 pages per minute for color and 20 pages per minute for monochrome prints. The method of hold down can be achieved using vacuum or electrostatic forces, ensuring precise retention of the sheet during the printing process.

The second patent focuses on a color ink jet printing device that significantly reduces intercolor bleeding. This device includes at least one printhead and three separate ink supplies: a slow drying black ink, a fast drying black ink, and a fast drying non-black color ink. The printing process involves determining black image portions and utilizing a pixel priming process or a border substitution process to minimize intercolor bleed. This innovative approach enhances the quality of printed images by ensuring that black pixels are printed with the appropriate ink based on their surrounding color pixels.

Career Highlights

Dewar is currently associated with Xerox Corporation, a leading company in the field of printing technology. His work at Xerox has allowed him to develop and refine his innovative printing solutions, contributing to the advancement of ink jet printing.

Collaborations

Throughout his career, Dewar has collaborated with notable colleagues, including Lesley P Dudek and Michael C Ferringer. These collaborations have fostered a creative environment that has led to the development of groundbreaking printing technologies.

Conclusion

Vaughan Louis Dewar's contributions to ink jet printing technology have significantly impacted the industry. His innovative patents demonstrate a commitment to improving printing efficiency and quality. His work continues to influence the future of printing technology.