Douglas J Ullmer

Title: Douglas J Ullmer: Innovator in Ink Storage Technology

Introduction

Douglas J Ullmer is a notable inventor based in Corvallis, OR (US). He has made significant contributions to the field of ink storage technology, particularly through his innovative designs that enhance the functionality of ink cartridges. His work is recognized for addressing common issues faced in the industry, making him a valuable asset to his company.

Latest Patents

Ullmer holds a patent for a "Collapsible storage bladder for ink cartridges." This invention presents an improved ink storage system that allows for rapid and continuous operation while effectively avoiding deprimes. The design features a flexible, resilient ink bladder that consists of an elongate reservoir, closed at the bottom and open at the top, with a tubular side wall. The bladder is supplied with ink, and a negative pressure is maintained within it. This negative pressure causes the side wall to collapse inwardly during ink delivery, ensuring efficient operation. The varying thickness of the side wall allows for proper collapse, preventing undesired increases in back-pressure and eliminating ink cartridge deprimes.

Career Highlights

Douglas Ullmer is associated with Hewlett-Packard Company, where he has applied his expertise in developing innovative solutions for ink storage. His work has contributed to the advancement of ink cartridge technology, making it more reliable and efficient for consumers.

Collaborations

Ullmer has collaborated with notable colleagues, including John B Dunn and Elwood H Barlow. These partnerships have fostered a creative environment that encourages innovation and the development of cutting-edge technologies.

Conclusion

Douglas J Ullmer's contributions to ink storage technology exemplify the impact of innovative thinking in the field of inventions. His patent for a collapsible storage bladder has paved the way for improved functionality in ink cartridges, showcasing his dedication to enhancing product performance.