CHAP. 

 XIII. 



(140 



MAIZE 



coarser cover for separating the granular meal from the bran, 

 which passes out of the machine at the tail-end. The product 

 of the tail-sheet is then purified on a " cyclo-separator " which 

 subjects the material to a strong air current and eliminates the 

 fine bran and other impurities. After it has been reduced on a 

 pair of finely fluted rollers it passes to the posser (Fig. 219) 

 for sacking off as a fine, pure meal. 



FOSSER BY 5AMUCL50N, BANaUliV. 



Fig. 219. — Posser. (Courtesy of Messrs. Samuelson, Banbury.) 



593. The Roller Mill Process. — The roller process of maize 

 grinding is generally carried out on a three-pair, high roller- 

 mill (Fig. 220), consisting of three pairs of fluted rolls, super- 

 posed in an iron frame, with suitable feed roll and feed hopper 

 fixed on the top of the frame. The grain is fed on to the first 

 pair of rolls (which are coarsely fluted), through the feed hopper 

 and feed roll, and are then passed on to a sieve, operated by a 

 cam or reciprocating motion, which takes out the fine meal 

 before the remainder passes on to the second "break " or pair 

 of rolls, when the same process is repeated ; it finally passes 

 from the third pair of rolls, which are finely fluted, as finished 



