Idaho semi-weekly world. [volume] (Idaho City, Idaho Territory) 1875-1908, 1888-06-01
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The following information resnect. |
ing the uses Of old rubbers viii Le
found TO he u interest:
when the bales Of boots, shoes and
arct'cs are received by the grinders.
gang Of women and girls are enpl. we'd
to sort out certain kinds. and also TO cut
tho uppers from the boots. Thi.
rough sorting' finished. the mass Il
run through pair Of deepIy-corru-
gated rolls. turning toward one an
other. whlck serves to crush and tear,
until there Is left no sembIance Of the
'iaii-worn boot or damaged rubber
that was introduced between these
iron Jaws. This machine Is called a
"cracker." and il common parlance
cracks tho stock. From 1t, a ragged.
stringy mass. it goes to the "grinder.
machine similar to that first men
toned. but with smooth rolls. and 3
most decided friction movement.
caused by the "back roll" turning
twice and half as fast As the front.
This machine by its constant grinding
converts the stock into powder. that
may be coarse or fine according as the
rolls are screwd near together or are
FAR apart Very naturally this powder
divides itself into several grades as IL
comes from the machine. for the poor
er parts are the first to be reduced, and
the genuine rubber succumbs last.
From the grinding-room the powder
goes to the sifting-room. where all til.
hber is carefully eliminated, and sand
and dirt aie removed As there
are often particles Of iron in this
powder. curious slide is in use,
over which it pours in thin black
stream. On the face o;ihis siiIe are ar
rarg ID series Of magnets. to which the
iron ellngs until removed by scrap-l
that moves transversely across the face
Of the slide. characterization i,
the next process in order, and is in o
word the conversion Of the shoddy int,
a dough similar to unvulcanized stock.
This is accomplished by placing the
powder in shallow pans in a boiler OF
steam chamber. and exposing it to live
steam heat for forty-eight hours. One
large rubber shoe manufsetory. thai
We have in mind, raise the heat to 81,
hundred degrees. ami claim the best Of
results from this high temperature.
After the sulphur has been volatilized
by this process, the powder is taken
out of the boiler and placed upon a
grinder. and there ground and kueadet
until it forms into rough sheets. wheI
it is ready to be mixed with shoe o.
other stock, and made up again int,
goods. and thus go again aud ag iii
before the pubic.
In addition to the black shoddy
which is made from old boots ant
shoes. there is red shodIy, made from
anthony rubber. used in bicycle tire
and mold work; white shoddy 70
wringer rolls. stopp'es and other whit
work. and pure gum shoddy, which
strange to say, is the worst of the lo'
although containing the most rubber
We append an analysis of few com
o pounds.
Compound for regular shoe solins
10 pounds of shod'ly. 9 pounds of rul
: Der, 80 pounds of whiting. s pounds @
i Iitharge. pounds of tar. II ounces {
! sulphur Another for the Shaking
i is: 80. pounds of sholdy, pounds {
q coarse rubber. 90 pounds of within:
. l2 pounds OF litharge. . pounds OF ia
= II ounces of sulphur. Still anoth'
y for shoe heels is: As pounds of shodd.
25 pounds of heel scraps, 6 pounds I
coarse rubber. so pounds of within:
10 pounds of litharge. 4 pounds OF ia
pound of sulphur
Of course there are grades OF GOO
i that contain no sho,ldy at all. but as
il rule cheap goods OF necessity must
= thus adulterated to be produced at Il
: market prices. The constant clam
m for cheaper rubber goods in all d
:. partments has caused the use OF sho
;, dy. Tie consumer calls for shoes
as twenty cents piir. when rubber is
: dollar a pound. and he gets the
n, made of rubber-shoddy. A retail
80 finds that he must sell pure rubh
re | packing for eight cents pound a
,c gets it made of shoddy, wet up WI
Il aim oil and loaded with lead a
an barvtes. 1t is but few short ye;
If since the Old rubber has assumed
IN commercial importance in this cot
II. try. and fewer still since its worth !
|; been acknowledged in Europe WI
a, first they were collected by the u
ed men the smallest possible price v
r. paid. but to-day the housewife in
n. parts of the country knows their wor
:, -Bostou Commercial! Bn!letin