The Coeur d'Alene press. (Coeur d'Alene, Idaho) 1892-1907, 1893-01-14
HOW FLOUR rs MADE.
4 JOURNEY THROUGH A MODERN
ROLLER PROCESS MILL.

""sss - first Broken By Rollers ana
Gradually Crashed Iste viosy BIZ sew.
srsi Series u Other RoIIsss-sepsrst-
Ing the S'ss vioar from Brss.
Let us enter roller process mill and see
IT. devices for reduction and separation It
work. First Of all we are shown the ma.
chimes which. by means OF sleeves and air
blasts. remove from the wheat it's sdmix-
ture OF cookies, tares. ships and dirt. Next
come the securing machines, stoutly
framed and covered with cases OF perfo-
rated cast iron. These are fed from the
clesnsers we have just seen, and their
duty Is 10 cut Oh the head Of the grain,
leaving 1t In perfectly secured and pol
ished condition for reduction by the roll
ers. Some millers prefer cases made Of
very heavy rolled wire Of square sections.
whose sharp. impinging edges exert
greater effect than II possible with wire Of
ordinary round form.
Cleaned and prepared, the wheat In now
ready for the first pair Of rollsrs. These
Are usually twenty four inches long, nine
inches 10 diameter and bear twelve cor
rugati0ns to the inch. In contour these
corrugations resemble the teeth OF . saw,
and vary with the kind Of wheat to be
treated. For the hardest varieties Of grain.
they are not 20 sharp a. for soft wheats.
To prevent their interlocking with each
other they wind around the rollers in q
gentle sgiral. To avoid splintering the
bran they are no nearer than il absolutely
necessary to accomplish the work Of each
reduction. They Are completely boxed In
20 ~ to he breast high, and through lit
tie glass window the miller can see how
their work Ii going on. As = rule the
rolIers are Of chilled iron, tough enough
not TO iced recutsing until after two to
i've years use.
Porcelain rollers give satisfactory re-
suits. but their employment Ii limited.
Chilled iron IL easier to manufacture and
repair. A We watch the first pair Of roll
- Al w0ek we observe that one Of them
revoiyeS faster than its mate, no that q
grain 81 wheat caught on the projection OF
slow roller IL stretched cut or unfolded
by the projection Ut the quick one. This
action IL is which opens the grain 30 as TO
shell out the middlings without At the
same time making more than = trihing
quantity OF -four. A point Just here 70
which the miller pays particular attention
is kseping these rollers At the right dis
tance apart. II too far from each other
they take no hold Of the wheat. II too
near they mash IL into fakes which resist
the -four separating process following up
the rollers work.
When wheat has passed through the
first pair VI rollers the product IL con.
Quoted 20 n scalping reel This reel il a
revolving cylinder. covered with wire. hav.
ing about ia openings to the square inch.
As the meal 10 carried up its ascending side
the nour and niddiings fall through. The
axis Of the cylinder 10 Inclined, aud the
portions Of wheat stock which cannot gel
through its meshes gradually ind their
way TO the cylinders end or tail" there
10 be taken TO a second pair Of rollers for 4
second reduction. la principal essenlially
the same a. the frst To the second PAL,
Of rollers succeed Others until q fifth O,
even a sixth pair il reached. Each pail
has more eorrugatious 10 the inch than ia
| predecessor. and has its two rollers placed
neArvr together.
In follow ing the partly broken wheat u
the second pair Of rollers We left behint
US Tor q mom~p, the -four and middling,
due To the first pairs action. These two
I products. the miller reminds us. were dc
I iiyrrrA by the scalping reel rs n mixturr
/ He now sn bnits them 20 q boiling reel, .
| frame clad with silk having hundreds nj
/ thousand. Of aper,ur-s TO the square inch
| This reel IL cylindrical. form much prc
| ferab!c TO the ak sided shape Of old pa,
terms Through its apertures the dou,
readily pas-.s. leaving the middlings 4,
tho reei. Ia this war sralpiug and boltiu,