James D Padgett

Title: Innovations by James D. Padgett in Ink-Jet Technology

Introduction

James D. Padgett is a notable inventor based in Portland, Oregon, recognized for his contributions to ink-jet printing technology. He holds two patents that showcase his innovative approach to enhancing print quality and efficiency. His work has significantly impacted the field of printing, particularly in producing high-quality images with varying color intensities.

Latest Patents

One of Padgett's latest patents is titled "Method and apparatus for producing ink intensity modulated ink jet." This invention focuses on gray scale ink jet printing methods and apparatus that produce high-quality images with varying color intensities. The process involves mixing a colored phase change ink with varying amounts of a clear phase change ink base, resulting in multiple gray scale levels for each color. This mixing can occur either before the ink is placed in the printer or within the printer itself, allowing for different levels of color intensity during the printing process.

Another significant patent by Padgett is the "Ink-jet print head having improved thermal uniformity." This invention features a media-width phase-change ink-jet print head that maintains a uniform temperature across its width, ensuring consistent drop mass and uniform print quality. The print head utilizes a heater with two separately controlled, overlapping heating zones that produce heat gradients. These gradients are designed to maximize output toward the edges of the print head and are controlled in response to thermistors positioned at the corresponding edges. This innovative design compensates for uneven head-to-drum spacing and other thermal loads, enhancing the overall performance of the print head.

Career Highlights

James D. Padgett is currently employed at Tektronix, Inc., where he continues to develop and refine printing technologies. His work at Tektronix has allowed him to collaborate with other talented professionals in the field, contributing to advancements in ink-jet technology.

Collaborations

Some of Padgett's notable coworkers include Ronald F. Burr and James D. Buehler. Their collaborative efforts have further propelled innovations in the printing industry, fostering an environment of creativity and technological advancement.

Conclusion

James D. Padgett's contributions to ink-jet technology through his patents demonstrate his commitment to improving print quality and efficiency. His innovative methods and designs continue to influence the printing industry, showcasing the importance of creativity in technological advancements.