Swinging Top Press Patents (Class 425/DIG128)
  • Patent number: 4751029
    Abstract: A system for molding elongated ribbon-like products from thermoplastic materials utilizing a plurality of molds which are moved in tandem along a production line. As the molds are moved along the line at successive stations they are, while open, thermally adjusted to a temperature suitable for forming the product to be molded and then a ribbon of plastic is deposited in them. They are then closed and cooled and reopened and the molded product removed. The system utilizes only enough molding pressure to assure distribution of the plastic to all parts of the mold cavity and shaping of the molded product to the geometric design of the mold. The system includes a transfer means for the molds which returns the emptied molds for recycling through the molding process.
    Type: Grant
    Filed: October 22, 1986
    Date of Patent: June 14, 1988
    Assignee: Nicholas Plastics, Inc.
    Inventor: Clifford D. Swanson
  • Patent number: 4072458
    Abstract: The invention relates to a mould carrier with a lower platen and an upper platen which can be pivoted with respect to the lower platen through 90.degree. upwards, for receiving the mould halves of, more particularly, polyurethane foam moulds, with an actuating member, which can be moved linearly for opening and closing the mould carrier, and with a two-armed main lever, whose one arm is connected via a toggle lever in an articulated manner with the actuating member, and whose other arm engages the upper platen, in the case of which the toggle lever in the closed position of the mould carrier is perpendicular to the direction of movement of the actuating member for dead-center locking.
    Type: Grant
    Filed: October 17, 1975
    Date of Patent: February 7, 1978
    Assignee: The Upjohn Company
    Inventor: Alfred Schlieckmann