Paul A LaChapelle

Title: Paul A. LaChapelle and His Contributions to Electrophotographic Charging

Introduction

Paul A. LaChapelle is an inventor associated with Fairport, New York, and Eastman Kodak Company. His patent work addresses corona charging methods and apparatus for electrophotographic imaging systems. He is credited with two patents.

Latest Patents

LaChapelle’s listed patents focus on improving the control and consistency of charging in electrophotographic equipment.

“Apparatus and Method for Low Sensitivity Corona Charging of a Moving” describes a system that charges a moving electrographic photoconductor with reduced sensitivity to changes in factors such as capacitance, speed, and charger efficiency. Separately addressed AC corona discharge units first charge the photoconductor above its target potential and then bring it down to the nominal level.

“Electrophotographic Apparatus with Improved Corona Charging” describes in-place charging using a corona discharge device with variably biased AC energization. A sensor detects the imaging member’s potential during charging, and the system adjusts the electrode’s bias toward the nominal charge potential in response.

Career Highlights

LaChapelle’s patents reflect work on practical challenges in electrophotographic imaging, particularly maintaining a desired charge level despite changing operating conditions. His inventions use staged charging and sensor-responsive control to improve charging performance.

Collaborations

LaChapelle’s listed coworkers include Bruce R. Benwood and Allen J. Rushing. His patent work is associated with Eastman Kodak Company.

Conclusion

Paul A. LaChapelle’s two patents document contributions to more controlled and reliable corona charging in electrophotographic systems.