EvAPORATKD Milk — Filling 



117 



milk. The openings in the cans lhr(;ni!^h wliich the cans are 



filled range from the San- 

 itary can, which is filled 

 with the top of the can 

 entirely remo\-ed, to the 

 \-enthole can with an 

 opening of not more thaii 

 one-eighth inch in dia- 

 meter. The filling ma- 

 chines are constructed to 

 fill by gravit3^ under pres- 

 sure, or in vacuo. 



These filling machines 

 should be thoroughly 

 washed and freed from all 

 remnants of evaporated 

 milk adhering to the 

 valves and other parts 

 after each use. Remnants 

 of milk left in any part 

 of the filling machine 

 decompose readily and 

 impair the \\'holesomeness 

 and marketable properties of the product. This is an important 

 point and one too often neglected. Much of the spoiled evap- 

 orated milk may be the result of the 

 use of unsanitary and unclean filling 

 machines. The fact, that the evap- 

 orated milk is sterilized after it leaves 

 the filling machine, is no excuse for 

 unclean filling machines. The operator 

 should bear in mind that the milk run- 

 ning through an unclean fillin.g ma- 

 chine becomes contaminated with mil- 

 lions of bacteria. The more bacteria 

 it contains, the more difficult it is to 

 render it perfectly sterile. Furthermore, 

 sporeforms are prone to develop in Fig. 44. venthoie can 



, , . i r -11 ir Courtesy of 



the decaying remnants of milk ; these j, ^ Dickerson Company 



Fig. 43. Venthoie filling machine 

 Courtesy of F. G. Dickerson Company 



