18 BULLETIN 867, U. S. DEPARTMENT OF AGRICULTURE, - 
These cage or curb presses are made in various sizes, with capaci- 
ties varying from 100 pounds of beans per hour to about 1 ton. The 
curbs correspondingly vary in diameter from 10 to 19 inches and in 
height from 24 to 9 feet. An actual installation of such equipment 
consists of a heating kettle provided with a steam jacket and stirrer 
immediately over the press, so that the heated contents of the kettle 
can be discharged through an opening in the bottom directly into 
the cage. These beans are heated to about 90° F. and pressed to 
the desired degree. The resulting cakes contain only about 10 per 
Fg. 9.—A cage finishing press for the heavy pressure Fic. 10.—A cage filling, finishing, and 
necessary for the production of oil. _. discharging press, whereall operations 
: are performed in the same press. 
cent of oil. Four such presses operated by two men have capacities 
of 500 pounds at each pressing, or an hourly total of 2 tons for the - 
four presses with two pressings; 3 tons with three pressings per hour. 
EXPELLING. 
The other method used in modern oilseed milling which has been 
applied to castor-bean pressing is that of expelling the oil in Anderson 
oil expellers. These machines are built around a horizontal cage or 
barrel, about 6 inches inside diameter and 33 inches long, which 
consists of bars about 0.025 inch apart at the feed end, 0.015 inch 
