The sun. [volume] (New York [N.Y.]) 1916-1920, 1919-09-14
U. S. TIRE COMPANY
HAS NEW TRUCK TIRE
Makes Notable Contribution
to Group Of Truck Solids
for Business.
Bx O. *. wHIDDEN.
waited States TIRE Compony.

Esfted States TIRE ConFponr.
After a long period OF experimental
ton new solid truck tire embodying
two entirely new principles of construc-
ton is now being placed on the market
by the United States Tire Company.
Tho two new principles involved In
the manufacture of this tire are so
radically different from all other exist
ing methods OF manufacture that they
are attracting close attention from tire
engineers. Many improvements in solid
tire manufacture have been made since
the advent OF the motor truck, but for
none of them have the broad claims
been made which are made for this new
tire.
One of the claims made 10 that a
method has been discovered Of eliminat-
ing tho grain" in the rubber and thus
greatly reduce splitting and cracking,
one of the chief causes Of trouble in
step forward has been made In solving
the problem of preventing tires from
separating from the tire bands.
with regard to this second claim 1t
IS pointed out that II has been the Gus
tom until now to fasten the rubber tire
TO the steel base by means of dovetailed
grooves in the steel band. This union
was mechanical and served the purpose
Of holding the rubber on the band with
a varying degree Of success.
The United States Tire Companys
laboratories have discovered new
process which enables them to form a
chemical union between the steel and
rubber and at last are able to announce
that rubber can be vulcanized to steel.
provided the steel Is treated In the pc
culiar manner developed by their chem
lists. This feature will practically elm
mate base separation, one of the most
bothersome of all solid tire troubles.
The other important improvement
embodied in the new tire relates to the
rubber itself and Is the result OF long
study Of rubber and rubber compounds.
Every one is familiar with the fact
that many materials possess marked
grain. This has been noticed particu-
larly in wood and in some rock forma-
lions, but 1t has not been generally
known that It is also a characteristic of
rubber. Rubber has grain OF spiral
formation which. while invisible, is
nevertheless present When the rubber
tire with this grain is affected by over
loading or rough usage, 1t will chip or
crack in the sides or wearing surfaces.
The cavities formed as a result OF
this condition are usually rounded in
contour and follow the grain of the
stock Just as wood will always split
along the grain and as rock formations
split on the exposed SURFACE along tne
various strata. The qualification in
solid tires is almost universally Of
double spiral form and is caused by
the mechanical working to which the
rubber stock is subjected In the process
Of manufacture.
The development of this tire is an
other important contribution by the
United States Tire Company to the
progress of the motor truck industry.
During the past decade this industry
has gone forward with giant strides,
but its success has depended to a large
extent upon the ability of tire manufac-
turers to meet the demands due to
changed conditions. In the early days
of the motor truck, these vehicles were
built to carry light loads and It was a
comparatively easy matter for tire
manufacturers to furnish adequate tires,
but the size of trucks and the weight
of loads has increased rapidly. until to-
day tire manufacturers are required to
furnish tires capable of standing up I'M
der loads of seven or eight tons. The
laboratories OF the United States
Tire Company have, In perfecting this
eew tire, again cooperated with truck
manufacturers to bring the whole indus
try to a new level of efficiency.
The new tire has been thoroughly
tested by the company In accordance
with its fixed plan to place nothing new
on the market until it has met the
most rigid tests.