Company Filing History:
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1 out of 1 
1 out of 2 Years Active: 1976-1978
Title: Otto Rosenkranz: Innovator in Plastic Heating and Molding Technologies
Introduction
Otto Rosenkranz is a notable inventor based in Hamburg, Germany. He has made significant contributions to the field of plastic materials, holding a total of 4 patents. His innovative methods have advanced the processes of heating and molding plastics, showcasing his expertise and creativity in this domain.
Latest Patents
Rosenkranz's latest patents include a method for heating plastic materials and a method for blow molding hollow plastic articles with a concave base. The heating method involves using infra-red radiators to heat workpieces made of synthetic plastics. To prevent localized overheating, the surface exposed to radiation is cooled during the heating process. His blow molding patent describes a process where the base of a hollow plastics body is initially formed in a convex shape, which is then deformed inwardly to create a concave area surrounded by an annular support surface. This deformation is controlled by an increase in pressure within the mold cavity after venting has ceased.
Career Highlights
Throughout his career, Rosenkranz has worked with reputable companies, including Heidenreich & Harbeck and its subsidiary, Heidenreich & Harbeck Zweigniederlassung Der Gildemeister Ag. His work in these organizations has allowed him to refine his skills and contribute to the advancement of plastic technology.
Collaborations
Rosenkranz has collaborated with notable individuals in his field, including Karl-Heinrich Seifert and Heinz Goos. These partnerships have likely enriched his work and led to further innovations in plastic processing.
Conclusion
Otto Rosenkranz's contributions to the field of plastic heating and molding are significant, with his innovative patents paving the way for advancements in the industry. His work continues to influence the development of new technologies in plastic materials.