VITREOUS ENAMELING 27 



1,268,778. John F. Dodge and Harry C. Allen. Enameling apparatus. 

 June 4, 1918. (251, 200). 



1,272,917. R. D. Cooke. Removing enamel from metal surfaces. July 

 16, 1918. C. A., 12, 1917. (252, 670). 



Treated first with HC1 (10 per cent) at 70 degrees and then with 25 per cent 

 NaOH at 70 degrees. 



1.273,632. William Lindsay. Enameling powder distributer. July 23, 

 1918. (252, 887). 



1,281,762. Frank J. Carpenter. Enameling apparatus. Oct. 15, 1918. 

 (255, 508). 



A plurality of contracting members for engaging the rims of articles to be 

 enameled attached to a rotating shaft. 



1,285,862. Stefan Wiester. Enamel oven. Nov. 26, 1918. (259 729). 



1,290,060. Albert J. Boland. Enameling furnace. Jan. 7, 1919., (258, 



ii). 



1,290,580. W. J. Kohler. Marking enameled ware. Jan. 7, 1919. C. 

 A., 13, 780. (258, 136). 



1,311,487. G. H. Benjamin. Enameling kiln. July 29, 1919. /. Am. 

 Ceram. Soc., 2, 852. (264, 772). 



1,313,834. I. Rennerfelt. Electric furnace. Aug. 19, 1919. C. A., 13 

 2642. (265, 424). 



The furnace is adapted to melting enamels in crucibles. 



1,314,831. F. Preusser. Opaque enamels. Sept. 2, 1919. C. A., 13, 

 2478; J. Am. Ceram. Soc., 2, 927. (266, 71). 



Relatively low content of the usual opacifying agents, such as tin or zinc 

 oxide is used by suitable mixing with other auxiliary ingredients. 



1,314,861. P. Eyer. Clouding composition for enamels. Sept. 2, 1919. 

 C. A., 13, 2748; /. Am. Ceram. Soc., 2, 927. (266, 71). 



Zirconium borate supersaturated with zinc oxide is used as a clouding 

 material in enamels. 



1,316,018. R. D. Cooke. Enameling sheet metal ware. Sept. 16, 1919. 

 C. A., 13, 2986. (266, 306). 



Sheet steel is coated with oil and subjected to a drawing operation, the 

 ware then is heated to remove the oil which produces a thin oxide coating on 

 the metal, the enamel is then applied and baked. 



1,332,058. C. Musiol. Enamel for metals. Feb. 24, 1920. C. A., 14, 

 1204; /. Am. Ceram. Soc., 3, 513. (271, 629). 



Triple silicate of Al, Na, and Ca mixed with fluorides and coloring sub- 

 stances. 



1,335,279. Paul Dupont. Enameling and annealing furnace. Mar. 30, 

 1920. (272, 804). 



