Патент USA US2131981код для вставки
Oct. 4-, 1938.. T‘ L, SHEPHERb 2,131,981 ELASTIC OR RUBBER THREAD OR YARN AND METHOD OF MANUFACTURING THE SAME Filed March 18, 1955 7.2:. ghephirj Patented-Oct. 4, 1938 v I I 2,131,981 ELASTIC 0R, RUBBER THREAD 0R YARN gND METHOD OF MANUFACTURHNG THE Thomas Lewis Shepherd, London, England Application March 18, .1935, Serial No. 11,720 InGreat Britain March 221, 1934i ‘ 6 Claims. ‘(CL 117-2) This invention relates to elastic or rubber whereby a rubber thread may be coated‘ as will ' I threads or yarns which are intended to be subse— quently used in the manufacture of fabric, hereafter be described; > Figure 2 is aviewbf two coatedthreads being clothing, lacework and the like or parts thereof twisted together; 5 or for‘ wearing apparel of any description. Such a yarn is usually made by ?rst forming a core of a rubber ?lament or thread which has been either extruded into a coagulating or spinning bath, or has been cut from a sheet of rub10 ber, and such ?lament is then covered with a double helical winding of cotton, silk and the like of relatively opposite twist so as to form as it were a ?brous jacket or covering to the rubber core. This ?brous covering will constl15 tute a protection to‘the‘ core when the threads or yarns are laid‘across one another as will re- sult when the yarn is being woven or knitted into a fabric, so that the intercrossing cores will. not cut into one another. _20 Such. a fabric covering is not altogether suc- , I. ‘ ' Figure 3 is a diagrammatic view of apparatus 5 for extruding ,a- thread. , Th'erubber thread is to be coated with com minuted material and a suitable adhesive ,is pre pared, so that the comminuted material is held. in suspension. The thread bto be covered is now 10 drawn or‘ otherwise passed under rollers eand ‘through the mixture (1 in a bath 0 in the man. her shown inFigure 1 'sothat it will pick up a coating of the mixture,,i. e. the solution and the comminuted material. When the thus .coat'ed vl5 thread leavesthe receptacle, it is subjected to a squeezingor pressing action by the rollers ffto consolidate the coating and bring it into .inti ~mate contact with the ‘thread.- The coated thread is then led away for drying, after which 20 cessful in practice, because the twisted convo- ' a vulcanizing or a hardening treatment may be lutions of the ?brous covering may and do exert an undesired in?uence on the degree of stretch t0 be given to the elastic yarn. and interfere 25 with its contractibility back to normal size. The application of the ?brous covering is expensive and requires to be very carefully executed, and again the ?brous covering possesses a tendency to creep 01‘ move relatively to the core. 30 Moreover, when rubber threads are to be led employed, such a system‘of coating thread may be ex tended to the manufacture of compound threads or yarn according to which and referring to Fig- 25 ure 5, two (or more) threads of rubber m in an unvulca'nized or tacky condition are‘ brought‘ together and twisted or doubled one upon the other. These threads which have already been coated as shown at n with the ?nely divided or 30 into a loom or knitting machine so as to be formed into a fabric, it is very often dif?cult to control the rubber threads because of the results in the fabric when completed having a comminuted material or have had such material incorporated therein and under tension or not are then twisted together as shown at o by any suitable means (not shown) and while this twist—, ing proceeds the ?nely divided material already 35 present on each thread becomes ?rmly amalga- ' non-uniform surface appearance or causes shire mated and mixed with the doubled thread 0 ' extensive and variable stretch that they possess 35 and the result of this capacity of the thread ring and other defects in the ?nished material. The object of the invention, hereinafter de40 scribed is to overcome this last mentioned defect and also to prevent the threads cutting into one another when they are laid across one another or across textile threads as is the case when they are woven into a fabric. 45 Other objects and advantages will appear from the following description. v , I find that by using comminuted material ac- cording to the invention, a thread maybe produced which is resistant to’ cross-cutting, does 50 not possess a frictional surface, possesses reduced extensibility, and may be dyed. The invention will now be described by way of example with reference to the accompanying drawing in which— 55 I Figure 1 is a diagrammatic view of a device which can now be described-as yarn, and it will be understood'that an additional quantity of the coating mixture as indicated at 10 may be 40 added as ‘the manufacture of the compound thread proceeds. The rubber thread to be used according to any of the above arrangements may be produced in various ways, for instance it maybe formed by 45 extruding or otherwise or it may be a thread al ready vulcanized. V _ ' Additional comminuted material may also be mixed in suspension in the bath containing the rubber solution and the mixture extruded 50 through nozzles as usual into a coagulating bath, which system will be hereafter referred to in connection with Figure 3, the resulting rub ber thread being then coated as described above. The adhesive when used may be any kind 55 2,131,981 coagulated in passing through the coagulating , which is suitable and may comprise rubber, Cel liquid w, the thread being subsequently led away luloid, cellulose, a suitable varnish, a resin, syn under a suitable tension if desired over a roller :1: thetic or natural, glue, linseed oil and the like. for subsequent treatment including the coating Further, it may have a consistency which sets or is stabilized by means of heat, chemical ac tion or otherwise so that it may be left in any desired ?nal condition, that is to say it will be ?exible or tough or hard. Moreover, the adhe sive maybe vulcanizable similarly to rubber‘ and 10 the term “rubber” used herein should be un derstood as including rubber in any suitable 15 as described above. I claim: . ' , - ' ' \ f 1. A compound thread formed of elastic rub ber and coated‘with a protective material to hold the thread rigid, such protective material being lacking at predetermined local areas to form‘a 10 speckled thread. a ' v > 2. A compound rubber thread consisting of form, namely any of those compounds as used for proo?ng cloth and the like material, any aqueous dispersion thereof, latex or a natural rubber threads twisted together and holding ad or arti?cial compound of rubber and in a‘ con throughout which comminuted material is sus centrated or compounded form. pended. It is to be noted that substances may be used according to the invention that are usually treat ditional comminuted material in the interstices, each rubber thread being provided with a coating 15 ' 3'. A process for coating rubber thread with a coating throughout which comminuted material - ed as waste. ' Moreover the subdivided material is suspended which consists in passing it through 20 may be dyed or capable of absorbing a dye so as a bath of liquid coating throughout which com 20 to impart to the ?nishedproductamulti-coloured r speckled appearance and in some cases the coated ?lament after vulcanization or harden ing may be so treated with a solvent that small portions of’ the outer skin of the coating will be removed or dissolved so as to expose to view the ?nely subdivided material and thus give the thread a speckled appearance. . Referring to Figure 3, q shows a bath con taining a mixture of an aqueous dispersion of latex, for example, suspended in which is a de sired quantity of' ?nely divided comminuted ?ock-like or similar material indicated at r. From the bath q the solution is pumped at s into a duct t leading to any usual form of extruding 85 nozzle u,' the duct and the nozzle'being sub merged in a tank 1) containing any suitable liquid coagulant such as w. The compound-thread which is extruded by the nozzle vu. will thus be minuted material is suspended, consolidating the coating on the thread by rollers, and drying the liquid on the thread. , 4.- A process‘ for forming a compound rubber thread, which consists in ‘coating rubber threads as specified in claim 3, with the addition that‘ twisted together before drying. , the threads are 5. A process for forming a compound rubber thread, which consists in coating rubber threads as speci?ed in claim 3, with the addition that twisted together before drying, and that comminuted material is added during - the threads are the twisting. ' > 6. A process as claimed in claim 3, and re- . moving the outer skin of the coating at least in parts. THOMASv LEWIS SHEPHERD. l.