Improvements in the Manufacture of Pneumatic Tyres
Year: 1897

page_text: as amended in accordance with the decision of the Chief Examiner
dated the 22nd day of June 1899.
Date of Application, 26th July, 1897
Complete Specification Left, 15th Apr., 1898-Accepted, 18th June, 1898
Improvements in the Manufacture of Pneumatic Tyres.
We, JOSEPH MOSELEY, Indiarubber Manufacturer, and BENJAMIN BLUNDSTONE,
Manager, both of the Chapelfield Works, Ardwick, Manchester, in the County of
Lancaster, do hereby declare the nature of this invention to be as follows:-
This invention relates to the manufacture of pneumatic tyres. In following
the ordinary process of manufacture, the air tubes are primarily formed upon
straight mandrels. As the tubes have subsequently to be bent into a circular
form it follows that the material upon the inside of the curvature will be com-
pressed and that on the outside will be put in tension or be stretched, whilst the
opposite condition is desirable for the outside of the curvature.
In carrying out our present invention we construct mandrels of the correct cross
section, but instead of making them straight we make them circular in plan.
Preferably, we may form them spirally, so that the two ends of the mandrel are not
in the same plane, and the tube may be easily withdrawn.
Total 11 0.111. 1
1000
W. E. HEYS & SON,
Agents for the Applicants.
Improvements in the Manufacture of Pneumatic Tyres.
We, RACHEL MOSELEY, of Cringle Hall, Burnage, Manchester, Administratrix
of the Estate of Joseph Moseley, deceased, of the Chapelfield Works, Ardwick.
Manchester, in the County of Lancaster, and BENJAMIN BLUNDSTONE, Manager, of
the Chapelfield Works, Ardwick, aforesaid, do hereby declare the nature of this
invention, and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
This invention relates to the manufacture of pneumatic tyres. In following
the ordinary course of manufacture, the air tubes are primarily formed upon
straight mandrels. As each of the tubes has subsequently to be bent into a
circular form to fit upon the rim of a wheel, it follows that the material upon
the inside of the curvature will be. compressed whilst that upon the outside or
larger diameter will be put into tension or stretched, whereas the opposite con-
dition is desirable for the outside of the curvature.
In carrying out our present invention, we construct the mandrels upon which

page_text: we form our air tubes, of the correct or desired cross section, but instead of making
them straight we make them irealar or curved in plan. Two such mandrels are
illustrated, each in plan and side elevation, by the accompanying drawings. The
mandrel is circular in cross section and corresponds approximately in shape and
dimensions with the air tube as ultimately placed upon the rim of the wheel, due
allowance having been made for the jointing if necessary. If the mandrel is made
simply in the form of a divided ring, then the two ends of the mandrel being in
the same plane and closely adjacent, there will be some difficulty in removing
the tube without springing the mandrel. To obviate this difficulty, we prefer to
make the mandrel a sufficiently spiral as illustrated by Figures 1 and 2, or
sufficiently helical as shown by Figures 3 and 4, with sufficient overlap to provide
for bare ends, for jointing, and other purposes as may be required. It is possible,
but less convenient, to form the spiral mandrel with two or more turns so that tubes
of considerable length may be made thereon.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is: :-
1. In the manufacture of pneumatic tyres, forming the air tubes upon eirenlar
or curved mandrels, substantially as and for the purpose hereinbefore described
with reference to the accompanying drawings.
2. As new articles of manufacture, air tubes for pneumatic tyres having a normal
eira-9 curved form produced as and by the means and for the purpose sub-
stantially hereinbefore described.
3. Circular or Curved mandrels for use in the production or manufacture of the
airtubes of pneumatic tyres, constructed and arranged substantially as hereinbefore
described with reference to the accompanying drawings.
Dated this 12th day of April 1808
W. E. HEYS & SON,
Agents for the Applicants.