Company Filing History:
Years Active: 1990
Title: Harold W Poulsen: Innovator in Electrolytic Coloring of Anodized Aluminum
Introduction
Harold W Poulsen is a notable inventor based in Fort Wayne, IN (US). He has made significant contributions to the field of anodized aluminum processing. His innovative approach has led to the development of a unique method for electrolytic coloring.
Latest Patents
Harold W Poulsen holds a patent for a "Method for two step electrolytic coloring of anodized aluminum." This invention describes a two-step process and apparatus for the electrolytic coloring of anodized aluminum using an electrode and the anodized aluminum immersed in an electrolyte. The first step involves anodizing the aluminum to form an oxidized film on its surface. The second step is the coloring process, where a modified sinusoidal voltage waveform is applied to the anodized aluminum and the electrode to color the oxidized film. The invention utilizes suitably gated thyristors in the secondary of a power supply to provide the desired voltage waveform. The voltage waveform is generated with a leading edge rise time in the negative portion that is substantially longer than in the positive portion. This method ensures good throwing power, coloring speed, color uniformity, and electrode dissolution, with the capability to subtract color.
Career Highlights
Harold W Poulsen is associated with Novamax Technologies Holdings Inc., where he continues to innovate in the field of anodized aluminum processing. His work has garnered attention for its practical applications and efficiency improvements in the industry.
Collaborations
Harold has collaborated with notable colleagues such as Kollengode V Srinivasan and Leo P Herrington. Their combined expertise has contributed to advancements in anodizing technology.
Conclusion
Harold W Poulsen's contributions to the electrolytic coloring of anodized aluminum demonstrate his innovative spirit and commitment to advancing technology in this field. His patent reflects a significant step forward in improving the efficiency and quality of anodized aluminum products.