Patents by Inventor William R. Rehman

William R. Rehman 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: 4515836
    Abstract: A process for providing a substrate such as a polyethylene terephthalate container with a gas barrier coating of a copolymer of vinylidene chloride is disclosed. The process includes locating the container to be coated in close proximity to one or more airless spray nozzles and impacting the outside surface of the container with a stream of a stabilized aqueous polymer dispersion such as an aqueous polyvinylidene chloride dispersion. The impacting force of the stable polyvinylidene chloride dispersion on the surface of the container is sufficient to cause selective destabilization of the dispersion at the surface interface to form a gel layer containing the polymer in the continuous phase. This gel layer serves as an adhesive layer for an overlying layer of the aqueous polymer dispersion as a continuous uniform coating. The resulting wet coating does not sag or run off.
    Type: Grant
    Filed: June 3, 1983
    Date of Patent: May 7, 1985
    Assignee: Nordson Corporation
    Inventors: Walter H. Cobbs, Jr., William R. Rehman
  • Patent number: 4505957
    Abstract: High solids coating methods and apparatus are disclosed which eliminate many of the disadvantages associated with known coating processes. The techniques disclosed require only a minor amount of a volatile solvent to achieve atomization and application of a paint or other coating material. High solids coating compositions containing about 70-99% by weight solids are atomized and coated. This method also enables polymeric compositions having high molecular weight to be employed as coating materials. According to techniques described, liquid compositions containing film-forming solids are kept under pressure with a minor amount of a highly volatile solvent of from about 1 to 30% by weight, even as low as about 1-10% by weight, at a temperature above the normal boiling point of the solvent.
    Type: Grant
    Filed: December 13, 1982
    Date of Patent: March 19, 1985
    Assignee: Nordson Corporation
    Inventors: Walter H. Cobbs, Jr., William R. Rehman
  • Patent number: 4505406
    Abstract: A method and apparatus for dispensing liquid compositions. The apparatus includes a reservoir for containing the liquid at a low temperature, transfer means to a circulating loop at a higher temperature, means for coincidentally heating and mixing the liquid in the loop and means for dispensing the liquid from the loop. The invention is particularly useful for dispensing liquid adhesive and coating compositions, including thermosetting polymers, heat sensitive polymers or plastisols and other dispersed liquid systems. In addition, mixtures of polymeric liquids with other components such as gases, solvents or liquid blowing agents may be employed with uniformity of composition for dispensing foams or atomizable paints.
    Type: Grant
    Filed: February 12, 1982
    Date of Patent: March 19, 1985
    Assignee: Nordson Corporation
    Inventors: Walter H. Cobbs, Jr., William R. Rehman
  • Patent number: 4423161
    Abstract: Pressure vessels are disclosed for containing a foamable mixture of liquid and a blowing agent for incrementally or continuously dispensing a foam of constant foam-volume ratio. Liquid compositions having coating or polymeric solids are capable of being foamed and dispensed with the apparatus. The method and apparatus are especially advantageous in dispensing foamed coatings, paints or adhesives with superior control.
    Type: Grant
    Filed: May 11, 1981
    Date of Patent: December 27, 1983
    Assignee: Nordson Corporation
    Inventors: Walter H. Cobbs, Jr., William R. Rehman
  • Patent number: 4378386
    Abstract: Method and apparatus for coating the interior and bottom surfaces of food and beverage cans which require protection against contact with the food or beverage content of the cans. The interior surface is sprayed with a high solids content liquid spray emitted from a pair of nozzles, one of which sprays the lower portion of the cylindrical side wall as well as the outer portion of the bottom wall and the other of which sprays the top portion of the cylindrical wall and the innermost center section of the bottom wall.
    Type: Grant
    Filed: November 9, 1981
    Date of Patent: March 29, 1983
    Assignee: Nordson Corporation
    Inventor: William R. Rehman
  • Patent number: 4301119
    Abstract: Pressure vessels are disclosed for containing a foamable mixture of liquid and a blowing agent for incrementally or continuously dispensing a foam of constant foam-volume ratio. Liquid compositions having coating or polymeric solids are capable of being foamed and dispensed with the apparatus. The method and apparatus are especially advantageous in dispensing foamed coatings, paints or adhesives with superior control.
    Type: Grant
    Filed: February 28, 1979
    Date of Patent: November 17, 1981
    Assignee: Nordson Corporation
    Inventors: Walter H. Cobbs, Jr., William R. Rehman
  • Patent number: 4247581
    Abstract: Surface coating methods and apparatus are disclosed which eliminate many of the disadvantages associated with known coating processes from pollution, equipment, materials, energy, labor and cost standpoints. According to techniques described, liquid compositions containing film-forming solids are formulated, then conveyed in the foam state towards a surface, and upon foam disintegration, form a film of solids on the surface. The techniques disclosed eliminate the need for solvents in paints or reduce volatile content to very minimal amounts. This method also enables polymeric compositions having high molecular weight to be employed as coating materials. Furthermore, the method has utility in nearly all coating processes where the film-forming solids are conveyed from a bulk state to a surface for coating.
    Type: Grant
    Filed: October 14, 1977
    Date of Patent: January 27, 1981
    Assignee: Nordson Corporation
    Inventors: Walter H. Cobbs, Jr., Robert G. Shong, William R. Rehman