98 



Sw'ivlCTKNi;!) CoNDI^NSlvD jMiLK FlLLING 



milk ha\-e a small <_)peiiiny, three-eights tu three-fourths inch in 

 diameter through which they are hlled. The cans known and sold 

 under the trade name "sanitary can" are filled before the top is 

 crimped on. Sweetened condensed milk is of a semi-fluid, viscous 

 and sticky consistency. The successful and rapid filling' of the cans 

 without spilling the milk over the top of the can is, therefore 



Fig. 31. The solder seal 



Fig. 32. The Sanitary can 



Fig. 33. The Gebee seal 



Fig. 34. The McDonald sea 



somewhat difficult. If done by hand the work is very slow. For 

 this reason many ingenious machines have been devised which 

 are more or less efficient in "cutting off" the milk without '"slob- 

 bering." The filling machines now in use vary from the primitive 

 hand filler, in which the condensed milk is "ground out" by the 

 turning of a crank by hand, to the most perfect forms of automatic 

 filling machines. In these filling machines, all parts coming in 

 contact with the condensed milk are constructed of brass. They 

 usually are equipped with a reservoir, receiving tank, or hopper, 

 which has an automatic feed," usually a floating device attached to 

 a valve, wdiich regulates the inflow according to the discharge. 



