Donald L Stewart

Title: The Innovative Contributions of Donald L. Stewart

Introduction

Donald L. Stewart is a notable inventor based in Crawfordsville, IN (US). He has made significant contributions to the field of closure testing technology. His innovative approach has led to the development of a unique apparatus that enhances the reliability of bottle closures.

Latest Patents

Stewart holds a patent for a "Closure pressure testing apparatus and method for testing closures." This invention features a bottle closure testing apparatus that includes multiple testing modules mounted side by side on a base plate. Each module consists of a base block with a pressure input, a pressure signal output, and a holder for a test vessel. The test vessel is a plastic bottle blow-molding preform equipped with a bottle finish and a pressure entry port. The design allows for efficient testing of closures by pressurizing the preforms to a preselected test pressure, with the ability to monitor pressure levels through gauges or transducers.

Career Highlights

Stewart is associated with Alcoa Closure Systems International, Inc., where he has applied his expertise in developing innovative testing solutions. His work has contributed to improving the quality and safety of bottle closures in various applications.

Collaborations

Throughout his career, Stewart has collaborated with talented individuals such as Kevin F. Osborn and Thomas J. McCandless. These partnerships have fostered a creative environment that encourages innovation and the advancement of closure testing technologies.

Conclusion

Donald L. Stewart's contributions to the field of closure testing exemplify the importance of innovation in ensuring product reliability. His patent and collaborative efforts reflect a commitment to enhancing safety and quality in consumer products.