David A Allerton

Title: Innovations by David A. Allerton

Introduction

David A. Allerton is a notable inventor based in Glenshaw, Pennsylvania. He has made significant contributions to the field of interlayer materials, particularly in the development of methods for applying graded shade bands on flexible sheets. With a total of 5 patents to his name, Allerton's work has implications for safety glass windshields.

Latest Patents

One of Allerton's latest patents is a method for supporting a flexible sheet while applying a graded shade band. This invention involves a unique apparatus for forming a colored shade band on an elongated area of a flexible sheet of interlayer material. The process includes applying a dye composition through electrostatic spraying against a non-conductive interlayer material, such as polyurethane or plasticized polyvinyl butyral. The flexible sheet is mounted on a support carriage and transferred to a coating chamber, where it is tilted and aligned with a platen mask for precise application. This innovation is particularly useful for creating interlayers in shaded, bent laminated safety glass windshields.

Another significant patent by Allerton focuses on the apparatus for forming a graded shade band on a substrate. This invention features a novel grounded shielding structure made of electroconductive material, which enhances the control of the dye application pattern. The design includes primary and secondary shields, with the option of a manifold to ensure superior control of the coating process. The workpiece produced through this method is also intended for use as an interlayer in safety glass windshields.

Career Highlights

David A. Allerton is associated with PPG Industries, Inc., a leading company in the field of coatings and specialty materials. His work at PPG has allowed him to innovate and refine processes that enhance the quality and functionality of interlayer materials.

Collaborations

Throughout his career, Allerton has collaborated with notable colleagues, including Dennis S. Postupack and Richard L. Emmert. These collaborations have contributed to the advancement of technologies in the field of interlayer materials.

Conclusion

David A. Allerton's contributions to the field of interlayer materials and his innovative patents have significantly impacted the safety glass industry. His work continues to influence advancements in the application of graded shade bands, ensuring enhanced safety and functionality in automotive glass.