Patents by Inventor John W. Key

John W. Key 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: 4186660
    Abstract: For screen printing, in which the screen fabric is tightly stretched across a frame structure, the frame, or at least its side bars, are formed of a plastic material which can be surface-softened by means of solvent or heat for bonding the fabric to it, thus providing the bonding agent in situ. The fabric is initially stretched over the face of the frame structure. The surface of the frame structure is softened, after which, to achieve the bonding, either a solvent is applied to the face surface through the fabric or this surface is heated through the fabric. After completion of the printing job, the fabric may be pulled away from the frame and the frame and fabric repeatedly reused. The removed screen fabric may be stored for future use.
    Type: Grant
    Filed: October 3, 1977
    Date of Patent: February 5, 1980
    Inventor: John W. Key