An Improved Construction of Cover or Envelope for the Air Tube of Pneumatic Tires.
Year: 1893

page_text: Date of Application, 9th Aug., 1893-Accepted, 16th Sept., 1893
An Improved Construction of Cover or Envelope for the Air Tube
of Pneumatic Tires.
I PAUL DE LAET of 2 Rue du Hainaut at Gand in the Kingdom of Belgium,.
Saddler, 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 envelope is so contrived and made that it may be secured in place by any
of the different methods of securing the envelope to the rim in existance more.
especially also by the so-called "New Dunlop" fastening.
This improved envelope is composed:
(1) Of a band of fabric, either linen or cotton A, which is cut obliquely or
straight with regard to the thread and of a breadth exactly corresponding to that
given to the envelope.
(2) Of a second band of fabric, either linen or cotton B; this being according
to the method of attachment, to be employed either of the same breadth or wider
than the preceding band.
(3) Of a thin layer of caout-chouc C, coming in direct contact with the air-tube,.
but thick enough to hide from the view or touch any trace of fabric.
(4) Of a caout-chouc band D, to come in direct contact with the ground; this.
band may either be thick or thin, according to purpose.
The following is the method of manufacturing the improved envelope:
The two bands of fabric A B are secured the one on the other in the direction of
their length by the aid of a solution of caout-chouc leaving however at each side
over the whole length of this band the border E unsolutioned for a greater or lesser
width according to the system of attachment in view.
Where two bands of fabric of different breadths are used, the larger band will
project beyond the smaller in a regular and even manner all along its length, the
overlapping representing the difference of the breadths of both bandages.
This being done, the inner band A. receives the thin sheet of caout-chouc C, com--
pletely masking the fabric and to come into immediate contact with the air-chamber.
The outer or opposite fabric B receives the caout-chouc layer D, which will come-
in contact with the ground. The whole is then vulcanized, so as to form an
integral whole, being an envelope, having all along its length at each side an unstuck
portion, forming a recess E (see Fig. 2 of annexed drawing).
Instead of vulcanizing the whole together, the bands A and B and the caout--
chouc coating C may be vulcanized separately from the caout-chouc layer D.
The envelope is either constructed to form a continuous circle in the first instance
or may be joined together afterwards at its ends to form a circle.
Having now particularly described and ascertained the nature of the said inven--
tion and in what manner the same is to be performed I declare that what I
claim is:
(1.) Improved exterior envelope for covering the air-tube in the tires of wheels:
for velocipedes or other vehicles, composed of two bands A and B of linen or cotton
web, solutioned together so as to leave along the length of the bandage a free or
unstuck edge or recess, to permit of the introduction of any suitable system of
attachment; these bands of fabric A and B being covered with a thin layer of
caout-chouc C on the inside, which comes into contact with the air chamber and on.
the opposite side with a caout-chouc sheet or layer D of greater or less thickness
on the side coming into contact with the ground; the said fabric and caout-chouc
layers being vulcanized either altogether or the layer of caout-chouc D, which

page_text: comes in contact with the ground, being vulcanized separately; substantially as
illustrated in the annexed drawing and hereinbefore described.
(2.) A vulcanized caout-chouc C, coming into contact with the air chamber and
applied over the inner fabric A.
(3.) The employment of cotton in exterior envelopes of pneumatic tires.
(4.) Two superposed bands of fabric A and B, solutioned together so as to leave
at the edges an unstuck part or recess E at each side of the bandage and along its
whole extension or circumference.
(5.) Two superposed fabrics (A and B) in combination with a caout-chouc sheet C
for coming in contact with the air tube and another sheet of caout-chouc D for
coming in contact with the ground, the whole being vulcanized together.
(6.) Two superposed fabrics A and B in combination with a sheet of caont-
chouc C, to come in contact with the air tube and the caout-chouc layer D, to come
into contact with the ground; the latter layer being separately vulcanized and
applied after the vulcanisation of the fabrics A and B and the inner caout-chouc
sheet C.
(7.) The recess E formed by the free and unstuck edges allowing of the
introduction of any fixing arrangement or system, after the fabric and caout-chouc
have been vulcanized.
2
1000
R. HADDAN,
Herbert Haddan & Co.,
18, Buckingham Street, Strand, London, Agent for Applicant.