US2151186A - Tire fabric - Google Patents

Description

March 21, 1939. F. CHADWICK 2,151,186

TIRE FABRIC Filed July 10, 1956 I): van /or.-

.20 ever serious disadvantages subsist. The action v l of th warp th eads, moving together. 20

Patented Mar. 21, 1939 2,151,186

UNITED STATES PATENT OFFICE TIRE FABRIC Fletcher Chadwick, Preston, England, assignor to Preston Tyre Fabric Manufacturing Company Limited, Higher Walton, Preston, England, a limited-liability company of Great Britain Application July 10, 1936, Serial No. 89,877

In Great Britain April 16, 1936 v 4 Claims. (01. 139-420) In the manufacture of tire fabrics and analocalender rolls have been applied thereto, in the gous fabrics consisting of woven textile threads usual coating or rubberizins. it is customary o mp y warp threads of pl d Taking the warp threads 3 and weft threads 4 or cabled yarns, commonly referred to as cords, as seen in Figure 1, and assuming that theweft 5 and weft of single threads. This is the simplest th ads 4 ar f tton as usual, it wil be evident 5 and most economical method of forming such th t h th al der r ll are applied the unfabrics, inasmuch as the weft threads serve to yielding nature of the said weft threads wou d he held the warps together s One advantageous conducive to the disadvantages hereinbefore result of this, e p threads being held a d enumerated, the closing together of the warp l0 controlled may separate sufflciently under the threads due to calendering pressure leaving the heavy pressure of the Calender 10115 in the hweft threads as potential sawing media across berizins coating of the fabric with rubber, s the warp threads 3. If however the weft threads that these arp th ads ar m r thoroughly such as 4 are of rubber, the effect of the calen-" coated as to their surfaces than can be possible dering is as o n diagrammatically in Figure where parallel warps only without weft are passed 2. That is to say, the rubber weft threads, when 15 through the calender, as in that case the warps th calendering pressure is applied, yield and asmust e ly h l s ly. t r during sume a position relative to the warp threads as the treatment to Prevent p c e shown diagrammatically, the crossing warp and With the known forms of woven fabric how- 'weft threads thus, on the fabric flexing transof the calender rolls causes relative movement It i found th t, employing rubber thread as of e crossing warp and We t h ea w weft thread, the finer the thread, within limits as u nt st rt n and a saw ng a ti n betw en will be understood, the better the ultimate effect.

them at their crossing p n s- Again, the heavy A convenient size of rubber thread is one which 2 pressure exerted by the calender rolls itself preas to dimensions is about equivalent to 50's yarn vents any application of the coating rubber to c nts, but I may employ any size which suits the contacting threads at these points and, most the purpose.

serious of all, when the tire fabric is in use as a An advantage of the use of rubber or rubber tire cloth the continual flexing of the same causes compound weft threads is that, whereas in know a proportionately continual sawing action bemanufacture of tire fabrics with warp threads tween the crossing threads at these points, deleand th usual weft threads, the pressure of t teriOliS heat b in Set p y the friction with calender roll itself prevents access of the rubber cutting of the warp threads and a considerable in the' rubberising or coating to the space bete g of the life of the fabric. tween a warp thread and weft thread at their The present invention is directed to the propoint of junction as hereinbefore stated, the use 35 vision of a tirefabric in which these disadvanof weft threads of rubber or rubber compounds tages will not appear, and according to such inensures rubberizing at that point and further vention a tire fabric is formed with warp threads the said weft threads become homogeneous with of usual character, and weft threads of rubber the rubber covering. The plasticity of the rubor rubber compound in a plastic and extensible her or rubber compound permits of the fabric 40 condition. The expression extensible as herein lying more fiat or more evenly surfaced than with employed in connection with a thread is ina non-plastic material such as ordinary cotton tended to denote a higher quality of elasticity yarn as usually employed. Less rubber therethan that posses d y the d ary cotton fore is required in the coating'or rubberizing,

threadowing to the reduction in the area of the undula- 45 The effect of thus forming the fabric is that torv surface of the fabric. the life andefllciency of the same are raised to I claim:

the maximum, the faults inherent in an ordinary 1. A tire fabric consisting of warp threads of cotton weft thread when used in such fabric tire cord, and weft threads, all the temporarily in avoi e Y binding weft threads being of rubber in a plastic The annexed diagrams are given to'assist in and extensible condition,

, the explanation of the invention, Figure 1 show- 2. A tire fabric consisting of warp threads of ing in section the warp threads with a weft tire cord, and weft threads, all the temporarily thread after weaving; and Figure 2 being a diabinding weft threads being of rubber compound gram of the warp and weft threads after the inaplastic and extensible condition.

3. A rubber-covered tire fabric consisting of.

warp threads of tire cord and weft threads which have previously served as temporary binding threads for the warns, the weft threads-being of plastic and extensible rubber and being incorporated with and homogeneous with the rubber covering.

4. A rubber-covered tire fabric consisting of

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