MANUFACTURE OF MILK POWDER 287 
at a temperature of about 100 degrees F. and that the milk at 
no time reaches temperatures higher than 120 degrees F. 
The Govers Process.—This process and equipment was 
invented and patented by Francis X. Govers, of Owego, New 
York, U.S. patent No. 939,495, November 9, 1909, 
In the Govers patent the milk is dried on two revolving, 
hollow cylinders (5) located at such proximity to each other 
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Fig. 97. The Govers milk drier 
that there is practical contact at the periphery of the two cvl- 
inders, in a similar manner as is the case with the Just process. 
These revolving cylinders, however, are inclosed and operated 
in an outer casing which serves as a vacuum chamber (2), which 
connects with a vacuum pump through pipe (27). There is a milk 
supply tank (1) with regulating valve (4), feeding the milk to 
the vacuum chamber through pipe (3). Plates (10) which bear’ 
against the opposite ends of the cylinders (5) form with the 
revolving cylinders a receptacle (13) to receive and retain a 
