Patents by Inventor Eric J. Koelsch

Eric J. Koelsch has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5143308
    Abstract: Apparatus and process for recycling post-consumer plastic containers supplied as compressed bales thereof to recover at least uncolored and colored PET uncolored and colored HDPE in flake form is provided. The apparatus and process includes debaling, sortation of the desired containers from the bale, granulation of these containers into flakes, wet processing to dissolve glue and the residue of contents of the containers and to provide separation of contaminants from the desired flake by specific gravity difference, and recovery of the purified flakes.
    Type: Grant
    Filed: March 26, 1991
    Date of Patent: September 1, 1992
    Assignee: Plastic Recycling Alliance, LP
    Inventors: Nazim S. Hally, Eric J. Koelsch, Joseph M. Shields, Jr.