Patents Assigned to Erma-Werke Waffen- und Maschinenfabrik GmbH
  • Patent number: 4137618
    Abstract: Spherical friction or sliding bearings are produced by first making a laminate from a layer of a thermosetting resin and a layer of material having a low friction coefficient. The thermosetting resin is used to impregnate a first web or fabric. The low friction coefficient material may be provided in the form of a further webbing or fabric, for instance, made of polytetrafluoroethylene. The thermosetting material may, for example, be a phenolic resin which is at this point of manufacture in its A-state and hence tacky. In order to permit the immediate further processing of the laminate with the thermosetting resin still in its tacky A-state, a dry adhesive film which neutralizes the tackiness, is applied to the laminate in sandwich formation which is then cut into pieces or strips of suitable size. The sandwich strips are then placed into a mold and pre-shaped and precision cut at room temperatures while the resin is still in its A-state.
    Type: Grant
    Filed: May 2, 1977
    Date of Patent: February 6, 1979
    Assignee: Erma-Werke Waffen- und Maschinenfabrik GmbH
    Inventor: Dieter Krauss