Indianapolis News, Indianapolis, Marion County, 19 August 1919 — Page 13
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Native v orkers setti~i out rubber tree seeds i ’ a i-laztclicn “nurzery'*. H ,’icn the rublsr trees reach a height of four or five feet they are transplanted to permanent feids ahere they mature in about sis years.
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On plantations tho milky juice of the rub* ber tree is coagulated, or congealed, in large vats by means of f weak add. This process of removing the water has largely superseded the more primitive method of smoking the fluid over fires made of palm nuts.
Many methods of tapping rubber trees are employed by different growers. Probably the most scientific is the herringbone method used by this native giri to extract the milky juice from the tree.
A ftern rubber is skimmedrfrom the congealing vats it is dried thoroughly before being baled or boxed for shipment. Plantation rubber reaches the rubber manufacturer Practically puke. V
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Rubber for your heels is mixed and baked like bread
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Many people believe that rubber heels are made by pouring liquid rubber into moulds. This is not the case. The heels are stamped nut of rubber dough or “compound” in the exact size to fit the moulds. Then they are put into the moulds and beksd under p» insure.
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As prepared for the pencil eraser, rubber is soft and cmmbly. its resiliency is slight and it wears away rapidly*
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The springiness and durability of a rubber heel depend on the dough, or “compound” l * * —
the use for which it is intended. One must
U t0 nSce 0 ScS OU bread? e so e8 oS an 0 ^ d .oft ia and affn ^di
erasers. One must endure steady pressure, another continuous pounding. Still others mutt withstand the grind of abrasion. The final character of any rubber article depends upon its “compound”. In perfecting the “compound” the rubber chem-
good quality rubber will make
good heels.
But good bread depends upon more than good flour—it depends on the dough, or the mixture of
flour with other ingredients. It is the use to which the article will be put, and the work it will have to do. Then he
the same with rubber heels. Rubber itself is an elastic, resilient substance derived from the milky juice
of certain tropical trees. In its crude of rubber and thousands of compounding
To secure the resiliency and durability
of O'Sullivan’s Heels the highest grades of rubber are combined, by a special process, with the best toughening agents known. The “compound” is next rolled into long strips and the heels stamped out just as biscuits are cut. Then the heels are placed in moulds and baked in vulcanizing presses die exact length of time to
effect the “cure”. (
It is this special process of mixing and
baking that has, since the making of the chooses from among a hundred varieties first rubber heel, established O'Sullivan’s
state it is not at all suited to practical use. Heat and light are its natural enemies. It becomes soft and tacky in hot weather and stiff and brittle in cold- Only by mixing it with other ingredients, and then “curing” or baking it under pressure can
rubber be made really useful. , Why "compounds" differ
The mixing or “compounding” process is not the same, however, for all articles made of rubber. Each of the 30,000 different rubber products in use today must have individual characteristics to meet
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ingredients until, by experiment, he has established the correct “compound” for
the required use.
Why O’Sullivan’s Heels have so muck "life"
O'Sullivan's Heels-now universally recognized as a practical necessity of city living
Heelsasthestandardof rubber heel quality •
I Guaranteed to outlast
any other heels
O’Sullivan's Heels are guaranteed to wear twice as long as ordinary rubber heels; and will outlast three pairs of
leather heels.
Go to your shoe repairer today and have
conditions—put an exacting demand upon O’Sullivan’s Heels put on your shoes.
the “compound”. O'Sullivan’s Heels must have both resiliency and durability-
O'Sullivan's Heels are furnished in black, white or tan; for men, women and chil-
the springiness to endure continuous dren. Specify O'Sullivan’s Heels, and be pounding, and the toughness to withstand sure that you get O’Sullivans—avoid the
daily grinding on hard pavements.
disappointment of substitutes.
The difference between ordinary rubber heels and O'Sullivan’s Heels If an O’Sullivan Heel is cut along Uc side, as shown at the right, so that a thin s^rip of rubber i3 left attached at one end, that strip will have great clasticitv—it can be stretched several inches. With an ordinary rubber heel the material snaps in two before it has stretched to any great degree. This test proves the remarkable resiliency and durability of O’Sullivan’s Heels.
r. ift9 hr ors. R. Co.
’Sullivan’s Heels .* ^Absorb the shocks that tire you out
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