Patents Assigned to Sterns Metals Inc.
  • Patent number: 4987762
    Abstract: An individually variable multi-stage drawing apparatus has a succession of drawing stations in a multi-level configuration, each station other than the first being vertically offset from and at a level lower than that of a preceding station. Each station includes a circular die through which a workpiece is forced by a cylindrical plunger. Each plunger is operated by its own individual hydraulic ram. In this way, plunger movement commences at a pressure and continues at a rate governed by the metallic flow requirements of the workpiece at each successive drawing stage.The invention further comprises transfer devices for shifting the workpieces from one drawing stage to the next. These transfer devices grip, carry and release the workpieces without subjecting them to potentially damaging frictional contact.
    Type: Grant
    Filed: December 8, 1989
    Date of Patent: January 29, 1991
    Assignee: Sterns Metals Inc.
    Inventor: Richard Cash, Sr.
  • Patent number: 4927070
    Abstract: A method for making multi-colored composite laminates comprises stacking a plurality of colored strips in a predetermined pattern and bonding the strips into a composite laminate by continuous bonding. The composite laminate is then rolled before being passed through a deep steel pattern roll which forms a raised pattern on its surface. Next, the laminate is passed through a skiving table where the raised pattern is skived off to expose the multi-colored pattern formed by the underlying layers. The laminate is than flat rolled to a finished dimension and may be reeled up into a cylindrical roll.
    Type: Grant
    Filed: March 10, 1989
    Date of Patent: May 22, 1990
    Assignees: Steven D. Kretchmer, Stern Metals, Inc.
    Inventor: Steven D. Kretchmer