22 VITREOUS ENAMELING 



679,300. William A. Dunpal. Enameling metal. July 30, 1901. (96, 



854). 



A thin finish coat is applied to a burned ground coat and while this is still 

 wet, a second thin coat of a contrasting color is applied. 



684,979. Edward Dithridge. Manufacture of enamels (apparatus). 

 Oct. 22, 1901. (97, 638). 



691,268. William Jankowsky. Enameling metal ware. Jan. 14, 1902. 

 (98, 365). 



Iron or steel is coated with a suitable primary coating (alkali carbonate) 

 and an enamel coat containing a suitable percentage of primary or acid salt 

 capable of decomposing the film. 



700,021. Edward Dithridge. Enameling fork for bath tubs. May 13, 

 1902. (99, 1542). 



707,490. Carl H. Zwerman. Enamel sifting apparatus. Aug. 19, 1902. 

 (100, 1732). 



708,363. George W. Ketcham. Art of enameling metal ware. Sept. 2, 

 1902. (100, 2115). 



The cleaned article is coated with a thin layer of cohesive and non-corrosive 

 metal and an enamel then applied which, upon heating, will coact with and 

 only partially oxidize and permeate the coating metal. 



709,530. Daniel Wieser. Manufacturer of enameled metal plates. Sept. 

 23, 1902. (100, 2460). 



The plates are coated with a mixture of zinc white and oil varnish, dried, 

 then coated with a greasy lacquer color, dried and rubbed. 



710,443. Paul Dupont. Machine for mechanically enameling baths or 

 other metal objects. Oct. 7, 1902. (101, 19). 



716,106. Rudolf Rickmann. Manufacture of white or light-colored 

 enamels. Dec. 16, 1902. (101, 2460). 



Sodium antimoniate is fused with the enamel. 



721,155. Hubert Claus. Enamel machine. Feb. 24, 1905. (102,1565). 



733>83 1. Samuel H. Frisk. Work holder for enameling. July 14, 1903. 

 (105, 446). 



758,325. Thomas M. Sunan. Manufacture of enameled ware. Apr. 26, 

 1904. (109, 2307). 



The cleaned article is coated with an enamel carrying metallic bodies, a 

 non-metallic hydroxide added and heated to flux and set the enamel. 



75935i' Edward L. Dawes. Enameling device. May 10, 1904. (no, 

 38o). 



762,547. Henry C. Milligan. Process of enameling steel ware. June 14, 

 1904. (no, 1860). 



Steel is pickled, washed, dried, immersed in an acid solution and coated 

 while wet with alkaline liquid enamel, dried and fused. 



77i507. Thomas L. Strong. Apparatus for drying enameled ware. Oct. 

 4, 1904. (112, 1080). 



774,478. John S. Jobe. Enameling kiln. Nov. 8, 1904. (113, 420). 



