Successive Dipping Steps Into Same Material Patents (Class 264/305)
  • Manufacturing textured gloves of silicone rubber
    Patent number: 4061709
    Abstract: There is described a method of manufacturing silicone rubber gloves with a non-blocking surface by repeatedly dipping a form in a solvent dispersion of uncured silicone rubber to build up a plurality of layers and then forming a layer of liquid droplets on the surface of the solvent-containing uncured rubber, thereby forming a textured surface as the solvent evaporates.
    Type: Grant
    Filed: June 25, 1975
    Date of Patent: December 6, 1977
    Assignee: Dow Corning Corporation
    Inventors: Carl W. Miller, Lester C. Vandenberg, Wayne H. Statt
  • Method of making hollow elastomeric bodies
    Patent number: 3978187
    Abstract: Annular elastomeric bodies having intricate shapes are cast by dipping a heated, rotating mandrel into a solution of the elastomer, permitting the elastomer to creep into sharp recesses, dryng the coated mandrel and repeating the operation until the desired thickness has been achieved. A bladder for a heart assist pump in which a cylindrical body terminating in flat, sharp horizontal flanges fabricated by this procedure has been subjected to over 2,500 hours of simulated life conditions with no visible signs of degradation.
    Type: Grant
    Filed: March 28, 1975
    Date of Patent: August 31, 1976
    Inventors: James C. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Fletcher, Howard F. Broyles, Jovan Moacanin, Edward F. Cuddihy