Johannes Gerum

Title: Innovations of Johannes Gerum in Magnetic Recording Technology

Introduction

Johannes Gerum is a notable inventor based in Unterpfaffenhofen, Germany. He has made significant contributions to the field of magnetic recording technology, holding a total of 5 patents. His work has been instrumental in advancing the methods used in the production of magnetic recording media.

Latest Patents

Gerum's latest patents include a method of preparing a magnetic recording medium. This invention involves a magnetic recording medium that consists of a flexible layer support and a magnetic layer made predominantly of finely divided magnetic particles in a binder, along with non-magnetic additives. The innovation improves the orientation of the magnetic pigments by adding a dispersion stabilizing component to the magnetic dispersion at a uniform rate throughout the dispersion process. Preferred stabilizing additives include highly purified lecithin, mixed esters of polyethoxy phosphate esters, ethylene diaminodistearate, polyurethane resins containing sulphonate groups, or vinyl chloride/vinyl alcohol copolymers.

Another significant patent is the process for the production of a magnetic recording material. This improved process includes a non-magnetic layer support and a magnetic dispersion made from a mixture of at least two different batches of finely divided magnetic pigments. The innovation is characterized by separately finely dispersing the magnetic pigment batches in a polymeric binder and/or a dispersion aid until the necessary degree of dispersion is achieved. The degree of dispersion is preferably continuously determined by a colorimetric arrangement.

Career Highlights

Throughout his career, Johannes Gerum has worked with prominent companies in the industry, including Agfa-Gevaert AG and BASF Magnetics GmbH. His experience in these organizations has contributed to his expertise in magnetic recording technologies.

Collaborations

Gerum has collaborated with notable professionals in his field, including Burkhard Nippe and Walter Meckel. These collaborations have further enriched his work and innovations in magnetic recording technology.

Conclusion

Johannes Gerum's contributions to magnetic recording technology through his patents and collaborations highlight his significant role in the advancement of this field. His innovative methods continue to influence the industry today.