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THE INDIA RUBBER WORLD 



June 1. 1921 



NEW TRADE PUBLICATIONS 



THE RiBBER Association of America, Inc., New York, N. Y., 

 has issued its Twenty-First Year Book, 1921, prepared by 

 the general manager and secretary. The pamphlet is smaller 

 this year, containing more practical information for the use of 

 members. Information concerning the constituency of the 

 general membership, of the various divisions and committees, 

 and miscellaneous matter as charter, constitution and by-laws, 

 necrology record, officers and directors since the Association 

 was organized, may be found in the year book. 



The Firestone Tire & Rubber Co., Akron, Ohio, has 

 issued a brochure entitled "Simplified Methods of Repairing 

 Giant Pneumatic Truck Tires," which deals with tire, valve, 

 and tube repairs of all types, and in the last few pages displays 

 all repair materials manufactured by Firestone, and a list of the 

 Firestone branches in the United States. 



The tire division of the Con\trse Rubber Shoe Co., Boston, 

 Mass., is distributing to the trade a novelty booklet describing 

 the Converse tire and its construction. On the front cover a 

 section of a tire is pictured, showing a small part of the tread, 

 and the inner construction and bead. The back of the folder 

 has a tab cut to fit over the front picture of the tire 

 and into a slit along the section where the tread and inner 

 construction are shown, thereby picturing; a perfect section of 

 a Converse tire. 



"Boys' Book of Indians" is a booklet published by The B. 

 F. Goodrich Rubber Co., Akron, Ohio, for its "boy friends." 

 It contains much information on Indian customs and life, 

 together with colored illustrations of well-known Indian char- 

 acters. Indian signs and their meanings are illustrated and the 

 tribal divisions shown over an outline map of the United States. 

 The center page is devoted almost entirely to a picture of the 

 three styles of bicycle tires made by the Goodrich company 

 and a word to the boys regarding their satisfactory service on 

 bicycles. The back cover contains some interesting facts about 

 auto tires. 



The crude rubber department of The Rogers-Pyatt Shellac 

 Co., New York, has issued its standard blotter showing fluctu- 

 ations of standard grades of rubber for 1920. The blotter also 

 shows prices from January, 1911, through April, 1921. 



An interesting series of illustrated and descriptive bulle- 

 tins on rubber machinery has been prepared by The Wellman- 

 Seaver-Morgan Co., Cleveland, Ohio. The machines treated are 

 fully illustrated and described and include the full line manu- 

 factured by the company, such as rimming press, mixing mill, 

 molds and cores, calender, tire press, cracker and washer, hydraulic 

 vulcanizer, also an instruction book for the tire press. 



Chat No. 4 of "The Black Art of Rubber Compounding" 

 is being distributed to the trade by Binney & Smith Co., 81 Fulton 

 street, New York. It contain.^ brief explanatory remarks on the 

 colloidal state ; Micronex black as a colloid, and the rubber stress- 

 strain curve and its requisite characteristics, with notes on con- 

 tinuity of stress and energy of resilience. 



Bulletin R-1401 with Supplementary Sheet No. 2, issued 

 by the Yarnall-Waring Co., Chestnut Ilill, Philadelphia, Penn- 

 sylvania, explains the recent development of the Yarway balanced 

 control valve in both angle and globe patterns, together with 

 several forms of operating mechanisms. 



"The Dancers of Faulty Brakes," a booklet issued by the 

 Thermoid Rubber Co., Trenton, New Jersey, explains how scien- 

 tific research is solving the problem of increased traffic, and brings 

 to the attention of the reader the necessity of keeping the brakes 

 safe by periodical inspection, claiming that a tremendous burden 

 is being placed on brakes as a result of modern motoring condi- 

 tions. In addition to half-tone and line-cut illustrations the 



pamphlet contains many tables which should be of great interest 

 to drivers of pleasure cars or trucks. 



"C-H Iron-Clad Solenoids," Publication 873, April, 1921, a 

 four-page leaflet of the Cutler-Hammer Manufacturing Co., 

 Milwaukee and New York, contains drawings and tabTes of 

 stroke and pull of solenoids. The descriptive matter covers 

 electric solenoids for operating brakes, clutches, valves and 

 similar devices where a straight-line motion is desired. 



"Hopewell Points the Way to Better Insulation," is the 

 title given Catalog No. 1 of the Hopewell Insulation & Manu- 

 facturing Co., Hopewell, Virginia. The Hopewell products are 

 illustrated and described in a thorough manner, with a brief in- 

 troduction in which is explained that "Paramold, ' a hard rubber 

 compound of which the insulators are made, is of high dielectric 

 and mechanical strength. 



"The Serial Number," Volume 1, Number 1, the official 

 organ of the National Tire Dealers' Association, Cleveland, Ohio, 

 made its appearance dated May 7, 1921. It is a four-page paper, 

 Syi by 11 inches, devoted to news of interest to the retail tire 

 trade, editorials and open letters. Whether the sheet will be 

 published monthly or bi-weekly remains to be determined by a 

 vote of the members. 



"Stretching a Rubber Band Across the Sea." Leaflet ad- 

 dressed to rubber manufacturers by the committee on organiza- 

 tion of the Foreign Trade Financing Corporation, 66 Broadway, 

 New York. 



This is a brief exposition of the large-scale plans for developing 

 American export business which the Foreign Trade Financing 

 Corporation intends to put into effect as soon as the $100,000,000 

 of stock in the new international trading concern has been floated, 

 and for which subscriptions have been promised by some of the 

 largest banks in the country. This concern, with a potential 

 credit-extending capacity of a billion dollars, was organized 

 under the Edge Act of 1919 to render for international commerce 

 much the same service as is given domestic trade by the Fed- 

 eral Reserve Board. Realizing that while war-spent foreigners 

 urgently want our goods, but cannot pay for them until their 

 own industries begin to get on their feet, the new corporation 

 would aid them and at the same time benefit American labor 

 and capital by shipping to our foreign friends the goods they 

 need, allowing them to pay with long-term promissory notes 

 backed by good securities. 



Manufacturers of rubber products, facing the serious problems 

 resulting from rapidly-shrinking export orders, are reminded 

 that they have but two avenues of relief, one being to cultivate 

 trade in the sections of the world which suffered least in the 

 war, as South America and the Far East, and the other being 

 to cooperate actively with other American manufacturing in- 

 terests, through some such agency as proposed, for extensive 

 financing of overseas trade. 



THE ADVANTAGES OF WATER VULCANIZATION 

 By Arthur E. Friswell" 



MY first introduction to rubber manufacturing was in a depart- 

 ment devoted to the manufacture of rubber thread. There I 

 learned how and why rubber sheet for thread was and still is 

 vulcanized in water. The following is a non-technical description 

 of the process. 



The rubber is calendered into sheets by a specially designed cal- 

 ender, which produces and doubles two sheets into one simul- 

 taneously. The sheet is rolled on itself as it comes from the 

 calender, talc being used to prevent adhesion. When the sheet is 

 thoroughly cooled, it is wound on a drum, and between each ply 

 of rubber there is wound under tension a web from a roll of 

 finely woven cotton cloth, absolutely free from all unevenness of 



^Ruhbcr factory consultant. 



