Condensed Milk and Mii,k Powder 109 



many factories, though it is very important. It may save labels and 

 boxes, as well as much unnecessary labor in unpacking cases with 

 leaky cans, and washing, relabeling and repacking them in new, 

 clean cases. 



In the case of evaporated milk (unsweetened, sterilized) all cans 

 coming from the incubating room should be individually shaken by 

 hand. All cans showing no signs of bulging, and the contents of 

 which shake with the characteristic sound and behavior of a liquid, 

 pass inspection. If the ends of the cans are bulging or the contents 

 do not respond to the shaking with the characteristic sound of nor- 

 mal milk, they are rejected, as the evaporated milk in them has 

 either undergone gaseous or curdling fermentation, and is spoiled. 



LABELING 



Labeling Machines. — In the early days of the milk condensing 

 industry, the labeling of the cans was done by hand, involving much 



Fig. 47. A very satisfactory labeling machine 



Courtesy of Burt Machine Co. 



time and considerable expense. Today, especially constructed label- 

 ing machines are almost exclusively used for this purpose. The 

 efficiency of these machines is such, that they have become a perma- 

 nent fixture in practically every condensery selling canned goods. 

 They are adjustable to various sizes of cans and can be operated by 

 hand, motor or belt power. 



Principle of Labeling Machines. — The cans are placed into a 

 chute from which they roll into the machine by gravity. They are 

 caught by two endless belts which draw them through the machine. 



