THE INDIA RUBBER WORLD 



529 



Lister's Cord Fabric. 



LISTER'S CORD FABRIC. 

 Lister's tire fabric strip is made up of two layers of spirally 

 wound rubberized cords, with the cords of one layer laid at an 

 angle to the cords of 

 the other layer and an 

 intermediate layer of 

 rubber formed by a 

 spirally wound strip of 

 rubber. The fabric 

 strip is formed on a 

 machine having a trav- 

 eling core composed of 

 an endless chain of 

 segments of the same 

 cross section as the finished tire. The tubular strip thus formed 

 is cut on its inner periphery, forming an open tube which is ready 

 to be applied to the core of a tire building machine. 



THE UXITEB ST.VTES "ROYAL CORD" TIRE. 

 The fabric used in the United States "Royal Cord" tire is 

 woven with very strong warp and light, soft filler threads, the 

 latter spaced about half an inch apart and serving only to hold 

 the web in position during the preparation of the carcass. The 

 rubberlhat is applied to tTie fabric and between each ply, forms 

 a covering about each thread in such a way, that when the tire is 

 completed, no thread' touches nor chafes against another, and 

 each thread bears its full amount of the inflation, and strain. 



In the manufacture of the "Royal Cord" tires; the fabric' is 

 first impregnated, so that all of the individual threads are thor- 

 oughlr • covered with rubber. By a special f rictioning process, 

 the spaces between the threads are then rubber filled, and, lastly, 

 the surface is skim-coated with rubber. The tires are then built 

 up on a core in the usual manner. 



THE GOODYEAR CORD TIKE. 



In the Goodyear cord tires a series of hard cabled parallel 



cords, without any cross weave other than the web-supporting 



threads, are imbedded in rubber in the 



usual way. The resultant fabric is 



then cut into bias strips and laid up on 



^ the tire core by the Seiberling- 



jE^' ' '^' _ '^^kv Stevens-State tire building ma- 



>--- .^?^^^fc_- chine. 



FUTURE OF THE CORD TIRE. 



At present the 

 cord tire is used 

 ly on large 

 cars, the 

 high 

 cost o f 

 Sea Is- 

 land and 

 Egyptian cot- 

 ton limiting its 

 field. It is said, however, tliat cheap and satisfactory tires made 

 from Peeler cotton are a possibility, which would give the small 

 car owner an opportunity to use them. 



Ah indication of the present importance of the cord tire in the 

 American trade is the prediction that 2.000,000 will be made 

 during the coming year. 



atiK^ 



only 



GOODYE. 



TIHE WEAR AND THE DIFFERENTIAL. 



Whellicr the differential is necessary or only advisable on 

 motor trucks is a subject of discussion in manufacturing circles. 

 Some claim that though the present differential is far from 

 satisfactory, it is a necessary evil, and it would not be wise to 

 discard it. It is pronounced a heavy and expensive mechanism, 

 which increases the cost of manufacture, of operation and of 

 maintenance. But as regards wear of tires, there is not the 

 slightest doubt that any vehicle not provided with a differential 



must give unequal wear on the tires, so much so, in fact, that 

 even with all its objections, the differential is still an economizer 

 in maintenance. 



RUBBER TRADE INQUIRIES. 



ri'tHE inquiries that follow have already been answered; never- 

 •* theless, they are of interest, not only in showing the needs 

 of the trade, but because of the possibility that additional infor- 

 mation may be furnished by those who read them. The editor 

 is therefore glad to have those interested communicate with him. 



[179.] Names of concerns handling guayule shrub are desired. 



[180.] .A. correspondent wishes to secure one or more rubber 

 trees of No. 1 quality for green-house novelty. 



[181.] Names of manufacturers of "rubber foam" have been 

 requested. 



[182.] A foreign rubber manufacturer contemplates making 

 tires and desires complete information on the subject. 



[183.] Aji inquiry has been received for inner tube testing 

 machines. ': 



[184.] The name and address of a firm making and selling 

 hard rubber beads is solicited. ' 



[185.] Information regarding a solvent for balata is requested. 



[186.] A correspondent desires the names of manufacturers 

 of sponge rubber. 



_ [187.] Makers of machines for covering metallic wire with 

 rubber are sought. 



[188. 1 A corrcspoiulent asks where wool and cotton flock 

 can be obtained. 



[189.] Tlie name of a manufacturer of a machine for 

 cutting designs in tread molds is requested. 



[190.] Names of companies making aniline dyes suitable for 

 rubber compounds are requested. 



[191.] An inquiry has been recevied for a firm manufactur- 

 ing rubber tile and interlocking rubber tile. 



TRADE .OPPORTUNITIES FROM CONSULAR REPORTS. 



An applicant in Spain desires to represent American manu- 

 facturers of india rubber goods. Report No. 21,273. 



An inq&irer in Norway would like to be placed in touch with 

 American exporters of india rubber for dental purposes. Report 

 No. 2i;322. 



A firm in Argentina wishes to receive quotations, descriptive 

 catalogs, etc., from American manufacturers of rubber tubes 

 for oxygen and acetylene gas under pressure, asbestos gloves, etc. 

 Report No. 21,390. 



Commercial relations with .-\merican manufacturers and ex- 

 porters of rubber articles are desired bv a firm in the Far East 

 Report No. 21,406. 



.\n agent in the United Kingdom desires to communicate with 

 an American manufacturer who can supply a loom or machine 

 for weaving elastic hosiery, elastic abdominal supporters etc 

 Report No. 21,409. 



A commercial organization in Russia requests the names of 

 American manufacturers of rubber erasers. Report No. 21,418. 



Representation of .American manufacturers and exporters of 

 hospital supplies in rubber goods is sought bv a firm in Italy. 

 Report No. 21,419. 



A firm of commission agents in Brazil seeks commercial rela- 

 tions with American manufacturers and exporters of rubber 

 tires and other rubber goods. Report No. 21,471. 



Representation of American manufacturers of surgical rub- 

 ber goods is desired by an applicant in France. Report 

 No. 21,590. 



