John W Long

Title: John W. Long and His Patent Work in Dry Toner Technology.

Introduction

John W. Long is an inventor associated with Freehold, New Jersey, and E. I. du Pont de Nemours and Company. His patent work includes innovations in dry toner formulations and processes designed to improve the uniformity of color development. Long is credited with 3 patents.

Latest Patents

Long’s listed patents describe a dry toner made from a carefully proportioned mixture of polymer particles and colorant particles. The polymer component consists of substantially colorless, inert, nonelectroscopic spheroidal particles, while the colorant component supplies the toner’s color. The patent descriptions specify particle-size ranges and limits on the proportion of particles outside preferred sizes, with ionic copolymer spheroidal particles identified as a preferred option.

The toner is intended to develop color on tacky areas. It can be deposited and distributed with a pad, and the described applicator includes a toner housing, a freely moving weight to agitate the toner, a mechanism for releasing it, and at least two hinged pads. A related patent describes the process for using the toner to achieve improved toning uniformity.

Career Highlights

Long’s documented patent contributions focus on practical improvements to toner composition, application, and color development. The inventions address both the physical characteristics of toner particles and the equipment used to apply them.

Collaborations

Long’s patent work is associated with E. I. du Pont de Nemours and Company. Michael G. Fickes and Charles W. Manger are identified as coworkers.

Conclusion

John W. Long’s patents reflect a focused contribution to dry toner technology, combining particle-design specifications with an applicator approach intended to improve the uniformity of color development.