Patents by Inventor Erhard Max

Erhard Max 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: 4583145
    Abstract: The magnetic disc comprises a magnetizable layer (1) to which an adhesion promoting layer (4) and thereto a lubricant film (5) are applied. Onto the substrate of the magnetic head (2) an adhesion reducing layer (9) is deposited. The apparatus can also show only one adhesion-influencing layer. The layers (4) and (9) are formed by the reaction of a sililating agent with reactive groups on the surface of the magnetizable layer (1), or of the substrate of the magnetic head (2), respectively. The sililating agents used differ in their terminal groups of which one category produce van der Waals bonds to the lubricant molecules, and the other is chemically indifferent relative to the lubricant molecules.The two layers (4) and (9) are made e.g. by the spin-coating of a solution of the sililating agent, and subsequent drying.The apparatus ensures a homogeneous coating of the magnetizable layer (1) with lubricant, and it prevents the pick-up of lubricant by the substrate of the magnetic head (2).
    Type: Grant
    Filed: April 27, 1984
    Date of Patent: April 15, 1986
    Assignee: International Business Machines Corporation
    Inventors: Annelie Monnich, Michael Glatzel, Holger Hinkel, Gerhard Kaus, Georg Kraus, Ulrich Kunzel, Erhard Max
  • Patent number: 4415634
    Abstract: A substrate for a magnetic recording disk employs an annular core of synthetic material having thin metal foils bonded to opposite faces, the metal foils serving to receive a magnetic recording material to form a magnetic recording structure. The inner surfaces of foils which are bonded to the core faces have applied thereto a thin, soft, deformable layer such as copper to prevent irregularities in the core faces from affecting the outer surfaces of the metal foils.
    Type: Grant
    Filed: May 24, 1982
    Date of Patent: November 15, 1983
    Assignee: International Business Machines Corporation
    Inventors: Holger Hinkel, Ulrich Kuenzel, Erhard Max, Jochen Schneider