MANUFACTURE OF MILK POWDER 



291 



,of heated air dates back to the invention of Samuel R. Percy in 

 1872. 



The Percy Process. This process was invented and patented 

 by Samuel R. Percy of New York City, U. S. patent No. 125,406, 

 April 9, 1872. The process embraces in its claims, a process of 

 atomizing and desiccating fluid and solid substances, also any viscid 

 substance containing water, by the use of dried, heated or cooled air 

 or gas, which forces the substance into atoms ; the atoms are thrown 

 forward, and forced into a chamber and dried in consequence of the 

 dried or heated air which propels them into the chamber and also, 

 owing to the dried and heated state of the chamber into which they 

 are thrown. 



The Stauf Process. The Stauf process represents the first 

 commercially successful application of the desiccation of milk by 



rig-. 99. The Stauf milk drier 



the spray-drying principle invented by Percy. The Stauf process 

 was patented by Robert Stauf of Posen, Germany, U. S. patent No. 

 666,711, January 29, 1901. 



The patent claims are as follows: "The process of obtaining 



