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AssigneePermar Systems, Inc.
InventorsEdward W. Beck, Blair M. Brewster, Andrew M. Walker
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The invention is directed to an improved method for making a porcelain enamel tag or sign. The process involves forming a single white porcelain enamel base coat over a suitable metal backing, and firing to bond the porcelain enamel to the metal, resulting in the formation of a porcelain coated metal blank. The blank is then coated with a photographic emulsion which contains a colored frit. The emulsion coating is allowed to dry, and is then ready to receive a printed image. The desired image or graphic to be reproduced is formed on a light transmitting backing, which is made in the form of a print. The print is then affixed to the porcelain enamel blank which contains the emulsion overcoating. The blank containing the image on its surface is then exposed to a source of activating radiation. Following exposure, the image containing blank is developed in a warm aqueous solution, whereby the water serves to develop the emulsion mixture. The developed blank is then fired to burn off the emulsion mixture, whereby the colored frit in the form of the desired image melts and is fused into the base coat to form a permanent image.
A method of making a porcelain enamel coated sign which consists essentially of:
A method of making a porcelain enamel coated sign which consists essentially of:
A method of making a porcelain enamel coated sign which consists essentially of:
Dependencies are inferred from the claim text.