302 MANUFACTURE OF MiILK PowpbER 
It is superior in this respect to the fine state of division of the 
product of other processes, in which state the particles are more 
difficult of mixture and solution, though they may be equally 
soluble. 
Gray patent No. 1,266,013 deviates in principle from No. 
1,157,935, in that the liquid to be desiccated is distributed on a 
desiccating supporting surface, and the dried milk is removed 
from this surface in finely divided form. The operation is made 
continuous by causing the spraying or depositing devices to 
travel in unison with the devices for removing the dried material, 
but so as to deposit the liquid on the supporting surface after the 
same has been cleaned of the dried substance. 
The desice ating ees 
chamber is of large an C 
size and cone-shape. G S 
The inclined or taper- = 
ing sides A form the ae 
supporting surface. It 
terminates at its bot- & +p ; 
tom in a suitable dis- - ze 
gz 
charge opening DB, reg- 
ulated by a valve b. At 
the top in the center . WSS rh, 
there is an exit C for 
the moisture-laden air, 
and peripheral inlet 
openings D_ for’ the 
heated air, similar as in 
the apparatus of the 
two previous patents, 
and so arranged as to 
» SR 
i 
create in the drying H Zz 
chamber a cyclonic B Haat , 
action, whereby any é ha 
Fig. 106. The Gray milk drier 
particles heavier than a 
the air are caused to seek the walls of the chamber and be 
deposited thereon. In the center of the upper portion of the 
drving chamber is a rotary spray nozzle I’, arranged to direct 
the milk in a fan-shaped spray against the inclined wall A. The 
