16 
BULLETIN 399, U. S. DEPAETMENT OF AGRICULTUKE. 
The strips are wound spirally on the drum until it is entirely 
covered and are then nailed down smooth with No. 3 nails placed 
about an inch apart. It is essential that no sharp corners or edges 
of the metal be left projecting, since these will cut the fruit and cause 
trouble. 
The details of the frame construction are shown in figures 6 and 7. 
The frame is made of pieces 4 by 4 inches mortised together and 
Fig. 7. — Side view of the peeling machine, with the cover removed. 
properly braced with iron. At the lower end of the machine the frame 
is 20 inches high and at the upper end 32 inches high, so that one 
end of the drum is 12 inches higher than the other. The frame is 
fastened to the floor by lag screws, the ends being further secured 
by iron braces in order to receive the end thrust which is caused by 
the drum being higher at one end. 
The feed screw (figs. 6, 7, and 9, E). — The feed screw is the same 
length as the drum. It is built with 2-inch galvanized-iron pipe as 
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m I 
m 
Fig. 8.— Top view of the feed table. 
a shaft, on which is soldered a spiral made of 22-gauge galvanized 
sheet iron. The flights of the spiral are 3i inches high and 4 inches 
apart, each flight being made separately. These are then united 
and soldered to form a continuous spiral and are set on the shaft 
so that they project forward about 15°. The faces of the flights are 
punched thickly with the 3-cornered punch, forming points about one- 
eighth of an inch high on the forward face. This screw is supported 
by pieces of a f-inch shaft set in sleeve collars held inside the pipe 
by screws. The shaft need not extend more than 2 feet into the 
p\pe at each end. 
