MANUFACTURE OF MILK POWDER 



295 



conveying the dry powder into a suitable collecting space away 

 from the air or gas current, and discharging th-e air or gas sepa- 

 rately from the dry powder. 



2. "The process of obtaining the solid constituents of liquids 

 and semi-liquids, in the form of powder, which process consists 

 in concentrating the substance by removing a large percentage 

 of water therefrom, converting the concentrated mass into a 

 spray, bringing such spray into a current of dry heated air or 

 gas having an avidity for the moisture of the substance treated, 

 retaining the atoms momentarily in said current so that sub- 

 stantially all the remaining moisture is converted into vapor 



Fig-. 101. The Merrell-Soule milk drier 



and the product is prevented by the cooling effect of such evap- 

 oration from undergoing chemical change, conveying the dry 

 powder into a suitable collecting space away from the vaporizing 

 current, and discharging the air or gas separately from the dry 

 powder." 



The Merrell-Soule Co. are operating numerous powdered 

 milk factories, with headquarters in Syracuse, N. Y. This com- 

 pany has subjected the spray-drying process to much experi- 

 mental study in efforts to perfect the process and to improve 

 the quality and keeping properties of the product. 



Obviously, during the life of the Stauf patent, which ex- 

 pired January 29, 1918, no one could make milk powder by the 

 spray-drying process, whether from milk uncondensed, or from 



1 From Plaintiff's Record in the U. S. District Court. 

 v{3. Rico Milk Products Co. 



Merrell-Soule Co. 



