Location History:
- Newton, CT (US) (2005)
- Newtown, CT (US) (2002 - 2018)
Company Filing History:
2 out of 2 
1 out of 2 
1 out of 1,267 
Years Active: 2002-2018
Title: The Innovations of Charles A. Willus
Introduction
Charles A. Willus is a notable inventor based in Newton, CT (US), recognized for his contributions to the field of inkjet technology. With a total of 5 patents to his name, Willus has made significant advancements that enhance the performance and reliability of inkjet heads.
Latest Patents
One of Willus's latest patents is titled "Determination of a maximum jetting frequency for an inkjet head." This innovative method involves generating a velocity/frequency curve for an inkjet head and identifying failure zones within this curve. These failure zones consist of frequencies that lead to jetting failures. The method further establishes a range of maximum jetting frequencies that exceed the frequencies of these failure zones, ensuring that subharmonic frequencies remain outside of the failure zones. Another significant patent is "Obtaining high frequency performance by controlling chamber pressure." This method and apparatus prevent ink starvation by maintaining ink in a primary common reservoir at high pressure. Ink is transferred to a local reservoir when a pressure drop occurs across a restrictor, which is caused by a higher ink flow rate due to rapid transducer firing.
Career Highlights
Throughout his career, Charles A. Willus has worked with prominent companies in the printing industry, including Ricoh Printing Systems America, Inc. and Hitachi Printing Solutions America, Inc. His work has significantly impacted the development of inkjet technology, leading to more efficient and reliable printing solutions.
Collaborations
Willus has collaborated with notable professionals in the field, including Stuart D. Howkins and Osamu Machida. These collaborations have contributed to the advancement of inkjet technology and the successful implementation of innovative solutions.
Conclusion
Charles A. Willus is a distinguished inventor whose work in inkjet technology has led to several important patents. His innovative methods and collaborations have significantly advanced the field, making him a key figure in the industry.