David H Chow

Title: The Innovative Contributions of David H Chow

Introduction

David H Chow is a notable inventor based in Bridgewater, NJ (US). He has made significant contributions to the field of powder charging technology. His innovative approach has led to the development of a unique method for induction charging of powder particles.

Latest Patents

David H Chow holds a patent for a "Method and apparatus for induction charging of powder by contact." This invention involves a method and apparatus for charging powdered particles and delivering only these charged particles to a workpiece. A high voltage electric field is created between upper and lower surfaces. Powder is continuously delivered to the lower surface, which is vibrated to bounce the particles. Each particle repeatedly contacts the lower surface, picking up an electrostatic charge with each contact. When the charge from the particle is sufficient to overcome gravity, the particle levitates and is transported to a workpiece, where it adheres by electrostatic attraction. Three important features of this method are: (1) No uncharged particles are levitated to the workpiece, eliminating the need for recirculating uncharged powder. (2) The method is capable of producing a high throughput of charged particles. (3) The method can produce powder with a controlled charge level.

Career Highlights

David H Chow is currently employed at Nordson Corporation, where he continues to innovate and develop new technologies. His work has had a significant impact on the efficiency and effectiveness of powder delivery systems.

Collaborations

Throughout his career, David has collaborated with notable colleagues, including Merle N Hirsh and Harry J Lader. These collaborations have further enhanced his contributions to the field.

Conclusion

David H Chow's innovative methods in powder charging technology demonstrate his commitment to advancing industrial processes. His patent reflects a significant step forward in the efficiency of powder delivery systems.