Patents Assigned to Davies Brothers Ltd.
  • Patent number: 4735892
    Abstract: A photosensitive element suitable for manufacture of an external nameplate comprises a substrate carrying a cured non-etchable background surface, an etchable curable polymeric layer that can be etched imagewise to provide an image viewable against a background, and a photosensitive layer. A nameplate or other sign is obtained by imagewise photoexposure of the photosensitive layer, developing the image to reveal the curable layer, etching the revealed curable layer imagewise, removing the residual photosensitive material and then baking the product.
    Type: Grant
    Filed: May 22, 1986
    Date of Patent: April 5, 1988
    Assignee: Davies Brothers Ltd.
    Inventors: Kenneth W. Orpwood, Robert G. Barnes, Edward R. Christie