Improvements in or relating to the Manufacture of Pneumatic Tyres.
Year: 1899

page_text: Date of Application, 19th Oct., 1899-Accepted, 13th Oct., 1900
COMPLETE SPECIFICATION.
Improvements in or relating to the Manufacture of Pneumatic Tyres.
We, MORLAND MICHOLL DESSAU, of The Ferns, Devonshire Street, Tooting, in
the County of Surrey, Manufacturer, and THE WAPSHARE TUBE COMPANY LIMITED,
of 3, Cross Lane, London, E.C., 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 and has for its
object to facilitate the shaping of the tyre previous to its completion.
According to this invention a drum, which can be readily collapsed so as to
reduce its diameter, is provided with a periphery grooved so that the cross sec-
tion corresponds to the cross section of the channel or tyre receiving face of
a wheel rim. The tyre previous to the outer rubber covering being applied
thereto is placed on this drum and inflated, when the fabric of which it is formed
will be stretched and shaped. While the tyre is inflated the outer rubber cover
is applied and solutioned in position along the tread, the tyre being then deflated
and removed from the drum when the solutioning of the outer rubber covering
can be completed.
It is to be understood that the word tyre as used in this specification and in
the appended claims is intended to include a tyre cover, as used with an inner
air tube, or a tyre of the type known as tubeless.
In the accompanying drawings:
Figure 1 is a perspective view of a tyre shaping drum constructed in accord-
ance with this invention, and
Figure 2 is a cross section of the same showing a tyre in position on the drum
and inflated.
Like letters indicate like parts throughout the drawings.
The drum is composed of a periphery A connected by an arm B to a hub C
through which passes an axle D; the periphery is provided with a central
groove A¹ corresponding to the cross section of the channel or tyre-receiving
face of a wheel rim. The drum is divided as at A2 and one portion of it is hinged
to the remainder, as at A³. At the point of division A2 lugs or sockets E, E',
are arranged in such a way that a pin F passed through them will retain the
drum in its expanded position, withdrawal of this pin allowing the drum to
collapse. A hole A is made in the drum to allow of the passage of the air valve
of the tyre.
The tyre which in the present example comprises an outer cover G, having
retaining wires H in the edges and an air tube J, is placed in position in the
groove A¹ of the drum A, the valve is passed through the hole A and the tyre
is inflated assuming the position shown in Figure 2. At the stage when the
tyre is applied to the drum the cover is without the outer coating of rubber.
When the tyre has been fully inflated and the cover G has stretched and shaped
itself the outer covering K of rubber is applied and solutioned in place along
the tread of the tyre. The tyre is now deflated, the drum A is collapsed by with-

page_text: drawing the pin F and the tyre removed from the drum. The edges K¹ of the
outer rubber covering are now solutioned to the edges of the cover G and the
tyre is complete and ready for use.
To obviate noise and damage from concussion when the drum A is collapsed
upon withdrawal of the pin F it is convenient to arrange upon the hub C a
rubber or other form of buffer C', a corresponding buffer being disposed on the
inner side of the periphery of the drum.
It is obvious that the groove A¹ in the periphery of the drum A may be shaped
to correspond to the cross section of the tyre-receiving face of any form of wheel
rim.
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 the employment of a collapsible
drum having a groove such as A¹ corresponding in cross section to the cross
section of the channel or tyre receiving face of a wheel rim substantially as and
for the purpose described.
2. In the manufacture of pneumatic tyres the employment of a collapsible
drum having a groove such as A corresponding in cross section to the cross
section of the channel or tyre-receiving face of a wheel rim and a hole such
as A for the reception of the tyre valve substantially as and for the purpose
described.
3. The complete grooved drum for use in the manufacture of pneumatic tyres
substantially as described or illustrated in the accompanying drawings.
1000
Daten
TITIS
100010
En CT
MORLAND M. DESSAU.
Boult, Wade & Kilburn,
Agents for the Applicants.