John D Douma

Title: The Innovative Mind of John D Douma

Introduction

John D Douma is a notable inventor based in Royal Oak, MI (US). He has made significant contributions to the field of rotary die cutting, showcasing his expertise and innovative spirit. His work has led to advancements that improve the efficiency and quality of manufacturing processes.

Latest Patents

John D Douma holds a patent for a rotary die cutting system. This invention features a pair of rotary dies with lands that have coacting cutting edges, designed to cut blanks of material from a web passing between the rotating dies. The design includes a positive rake on the side face of the land adjacent to the cutting edge, ensuring a clean cut and improved squareness of the cut ends. The cutting edges are strategically located and arranged on the dies to allow for axial and rotary phase adjustments, enhancing the precision of the cutting process. Additionally, the patent discloses a die stand for positioning, adjusting, and driving the rotary dies, along with a method for creating negative electrode cylinders used in the production of the rotary dies through hardening, grinding, and electric discharge machining of tool steel blank cylinders.

Career Highlights

John D Douma is associated with Bernal Rotary Systems, Inc., where he applies his innovative ideas to real-world applications. His work has not only contributed to the company's success but has also set new standards in the industry.

Collaborations

Throughout his career, John has collaborated with talented individuals such as Jerry L Bell and David P Keinath. These partnerships have fostered a creative environment that encourages the development of groundbreaking technologies.

Conclusion

John D Douma's contributions to rotary die cutting exemplify the impact of innovation in manufacturing. His patent and collaborative efforts reflect a commitment to advancing technology and improving production processes.