THE EXTRACTION OF JUICE BY MILLS. 



bearing surface ; to one end of the shafts are keyed pinions gearing into each 

 other, by means of which motion is transmitted from the top shaft to the 

 two lower rollers. Generally mills are geared on one side only, but 

 occasionally gearing is found on both sides. The rollers are kept in position 

 by the caps d ; through these caps pass throughway bolts, which keep the 

 caps pressing on the bushes. The position of the rollers is adjusted by means 

 of these bolts. The headstocks rest on the sole plate g, to which they are 

 securely bolted ; all the vertical bolts pass through the foundation, and act 

 as holding down bolts ; the partially crushed cane coming from the top and 



jfi 



H 



FIG. 104. 



front rollers is directed to the top and back rollers by the trash turner, which 

 consists of two parts, the trash bar / and the trash plate, the curve of 

 which is also shown. 



Solid Headstock Type. The older type of three-roller mill is 

 seen in Fig. 105, and is referred to as closed headstock or rigid pattern ; the 

 side rollers are kept in place by set screws, passing horizontally through the 

 headstock. Mills of this type are still occasionally built, and so far as 

 ' crushing ' is concerned, perform as well as the more elastic open headstock 



173 



