Patents by Inventor John A. Marcinek

John A. Marcinek 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).

  • Parison for making molecularly oriented plastic bottles
    Patent number: 4588620
    Abstract: Mold and core rod combination for forming a plastic parison for stretch/blowing into a plastic bottle comprising a core rod with an end mated to the mold so as to permit formation of a parison with a flat on the bottom and having a sharp taper from said flat to the sidewall of the parison. The core rod is preferably shaped to include a shoulder having a substantially straight outer wall at the mouth end of the parison mold, and constructed and arranged with the mold to permit deposit of additional plastic at the inner wall of the shoulder of the parison. The design of the mated mold and core rod combination is based on the recognition that in a continuous bottle forming process a particular area of the parison can be made hotter or cooler by increasing or decreasing the thickness of that area of the parison.
    Type: Grant
    Filed: March 29, 1985
    Date of Patent: May 13, 1986
    Assignee: Emhart Industries, Inc.
    Inventor: John A. Marcinek
  • Method of making molecularly oriented plastic bottles
    Patent number: 4521369
    Abstract: Mold and core rod combination for forming a plastic parison for stretch/blowing into a plastic bottle comprising a core rod with an end mated to the mold so as to permit formation of a parison with a flat on the bottom and having a sharp taper from said flat to the sidewall of the parison. The core rod is preferably shaped to include a shoulder having a substantially straight outer wall at the mouth end of the parison mold, and constructed and arranged with the mold to permit deposit of additional plastic at the inner wall of the shoulder of the parison. The design of the mated mold and core rod combination is based on the recognition that in a continuous bottle forming process a particular area of the parison can be made hotter or cooler by increasing or decreasing the thickness of that area of the parison.
    Type: Grant
    Filed: January 3, 1984
    Date of Patent: June 4, 1985
    Assignee: Emhart Industries, Inc.
    Inventor: John A. Marcinek
  • Mold-core rod combination for forming an injection molded plastic parison
    Patent number: 4432530
    Abstract: Mold and core rod combination for forming a plastic parison for stretch/blowing into a plastic bottle comprising a core rod with an end mated to the mold so as to permit formation of a parison with a flat on the bottom and having a sharp taper from said flat to the sidewall of the parison. The core rod is preferably shaped to include a shoulder having a substantially straight outer wall at the mouth end of the parison mold, and constructed and arranged with the mold to permit deposit of additional plastic at the inner wall of the shoulder of the parison. The design of the mated mold and core rod combination is based on the recognition that in a continuous bottle forming process a particular area of the parison can be made hotter or cooler by increasing or decreasing the thickness of that area of the parison.
    Type: Grant
    Filed: July 10, 1979
    Date of Patent: February 21, 1984
    Assignee: Emhart Industries, Inc.
    Inventor: John A. Marcinek