Robert W Pries

Title: The Innovations of Robert W. Pries

Introduction

Robert W. Pries is a notable inventor based in Longmont, Colorado. He has made significant contributions to the field of electrophotography, holding a total of 3 patents. His work has been instrumental in advancing technologies that enhance the efficiency and effectiveness of document detection and toner concentration control.

Latest Patents

One of his latest patents is a document detector designed for use in electrophotographic machines. This invention focuses on high-density toner concentration control. The patent describes a toner concentration control test cycle in which a developed test area is formed on a photoconductor charged to a dark charge level. The optical reflectivity of the developed test area is sensed, and the results are used to replenish toner if indicated. During the test cycle, the magnetic brush bias potential is altered to produce development of the test patch in the gray area while maintaining the dark charge at a predetermined nominal level. An electrostatic probe and associated circuitry are provided to maintain the dark charge at the nominal level during the test cycle.

Career Highlights

Robert W. Pries has had a distinguished career at International Business Machines Corporation, commonly known as IBM. His work at IBM has allowed him to explore innovative solutions in the realm of electrophotography, contributing to the company's reputation as a leader in technology.

Collaborations

Throughout his career, Robert has collaborated with several talented individuals, including James R. Champion and Henry Wellington Simpson. These collaborations have fostered an environment of innovation and creativity, leading to advancements in their respective fields.

Conclusion

Robert W. Pries is a prominent figure in the field of electrophotography, with a focus on improving document detection and toner concentration control. His contributions through his patents and work at IBM have made a lasting impact on the industry.