Company Filing History:
1 out of 2,439 
1 out of 832,880 Years Active: 2003-2004
Title: Innovations of William Donald Chappell
Introduction
William Donald Chappell is a notable inventor based in Royal Oak, MI (US). He has made significant contributions to the field of printing technology, particularly in the banking sector. With a total of 2 patents, Chappell's work has focused on enhancing the efficiency and quality of bank check processing.
Latest Patents
Chappell's latest patents include a "System and method for high quality bank check imprintation during high velocity passage of bank checks." This invention features a printer housing assembly with dual in-line cartridges that are strategically separated by a pre-set distance. Drive belts facilitate the rapid passage of documents, such as checks, past the nozzles of the cartridges. A delayed firing mechanism ensures that each cartridge prints the same marking on the same spot of each document. Additionally, the design allows for further enhancements through the use of multiple cartridges, enabling "dot-on-dot" printing for improved contrast quality.
Another significant patent is the "Variable rate ink jet endorser." This method and system for ink jet printing adjusts the column pitch according to the document speed. The endorser control system includes a processor with a DMA unit that retrieves column data at a specified rate. The system also features a sequencer that converts column data into dot data, ensuring accurate printing as the document travels at variable speeds.
Career Highlights
Throughout his career, Chappell has worked with various companies, including Unisys Corporation. His experience in the industry has allowed him to develop innovative solutions that address the challenges faced in high-speed document processing.
Collaborations
Chappell has collaborated with notable individuals such as Kenneth Richard Berkoben and William Lawrence Kozlowski. These partnerships have contributed to the advancement of his inventions and the overall improvement of printing technologies.
Conclusion
William Donald Chappell's contributions to the field of printing technology, particularly in banking, have been significant. His innovative patents demonstrate his commitment to enhancing the efficiency and quality of document processing. His work continues to influence the industry and pave the way for future advancements.