THE INDIA RUBBER WORLD 



[October 1, 1919. 



hydrogen in the testing apparatus for at least one hour before beginning 

 the test, this time being in addition to that necessary to replace the air 

 in the permeability cell with hydrogen. The fabric shall be maintained 

 during the test at a temperature of at least 77 degrees F. (25 degrees C). 

 A current of pure hydrogen shall be maintained against one side of the 

 fabric for a test period of at least two hours. The hydrogen current shall 

 be under a pressure of at least 1.18 inches C30 mm.) of water above the 

 pressure on the air side of the fabric. Dry air at approximately atmos- 

 pheric pressure shall be passed over the air side of the fabric. The 

 quantity of hydrogen that passes through the fabric shall be determined 

 either by burning to water and weighing as such, or by any other accurate 

 method such as that using the gas interferometer. The permeability shall 

 be calculated in liters of dry hyrdogen, measured at 32 degrees F. (0.0 

 degree C.) and at 29.92 inches (760 mm.) mercury pressure. The per- 

 meability shall be expressed in liters per square meter per 24 hours. 



22. The permeability of the fabric must not exceed the maximum 

 permeability shown in Table 2. 



23. Weight. The weight of the fabric shall be determined under 

 existing huniiciity conditions by weighing three representative test pieces, 

 cut out of the sample with a die, each having an area of at least 4 square 

 inches. Weights shall be expressed in ounces per square yard. 



24. The average weight per square yard of at least three test pieces 

 must not be more than the maximum nor less than the minimum limits 

 given in Table 2. 



25. Light Test. The fabric shall be run over a bank of lights and 

 carefully examined for imperfections of manufacture, such as pinholes, 

 uneven spreading, imperfect doublinc, wrinkles and other defects. 



26. Weak or imperfect parts of the fabric which have been marked 

 on the cloth before rubberizing, or which have been discovered in the 

 finished fabric, shall be distinctly marked on the finished balloon fabric. 

 Sections of cloth so marked shall be excluded or patched in cutting panels 

 for United States Army balloons. 



MARKING. 



27. Finished balloon fabric shall be stamped or marked, at intervals 

 of two feet, with the official acceptance stamp of the Bureau of -Mrcratt 

 Production. 



28. All rolls of balloon fabric shall be plainly tagged with the grade, 

 the manufacturer's name or trade-mark, the date of manufacture and 

 the Bureau of .Aircraft Production order number. 



INSPECTION. 



29. All balloon fabric shall be subject to insp 

 Department of the Bureau of Aircraft Producti( 

 Inspection. 



30. The inspector shall at all times have free : 

 factory which concern the manufacture of halloo 



JUDICIAL DECISIONS. 



ASchr.ider's Son vs. Protex Manufacturing Co.— District 

 • Court, Eastern Division of Northern District of Ohio. 

 November 7, 1918. 



Suit to prevent the infringement of Twichell patent No. 

 927,298 for a gage for testing the pressure in automobile tires. 

 Injunction granted. (Federal Reporter, Volume 2S4, page 438.) 



A. G. Spalding & Brothers, vs. John Wanamaker, v.i. 

 Samuel Buckley & Co. of London and New York. — Circuit 

 Court of Appeals, Second Circuit, February 13, 1919. 



The suit was brought for infringement of patent No. 878,254 

 for a golf ball pitted with circular cavities. The sides of the 

 cavities are very sleep, at an angle of 145 degrees at the per- 

 iphery. The Wanamaker ball had similar circular cavities be- 

 tween sides made at an angle of only 35 degrees with the surface. 

 The court held that these would not accomplish what was claimed 

 for the Spalding ball, that the inclination of the sides was an 

 essential part of the patent and that, therefore, there had been 

 no infringement. Injunction denied. (Federal Reporter, Vol- 

 ume 256, page 530.) 



Miller Rubber Co. vs. DeLaski and Thropp Circular 

 Woven Tire Co. — Circuit Court of Appeals, Si.xth Circuit. May 

 6, 1919. 



The DeLaski company brought suit for infringement of their 

 patent, (No. 1,011,450), for a tire-wrapping machine. This patent 

 had been declared valid in the Circuit Court of Appeals for the 

 Third Circuit in the suit of the DeLaski company against W. R. 

 Throop and Sons. Subsequently the DeLaski company acquired 

 the W. R. Throop business. 



The Miller company bought a tire-wrapping machine from 

 De Laski and one from W. R. Throop ; then it had two more 

 machines built, which DeLaski asserted were made according to 

 his patent; he sued in behalf of the W. R. Throop interests also. 



The court held that the question of infringement depended on 



whether the pressure head or its equivalent of the DeLaski patent 

 had been used, and decided against the Miller company, declar- 

 ing that the infringement was "purposeful and ine,xcusable" and 

 that there was just apprehension that it would be persisted in. 

 (Federal Reporter, Volume 257, page 733.) 



DECISIONS OF COMMISSIONER OF PATENTS. 



In re Link-Belt Company. — Court cif ,^ppeals of the District 

 of Columbia, June 2, 1919. 



Court held that the Commissioner of Patents was right in re- 

 fusing to register as a trade mark for rubber and fabric belts 

 the word "Service" surmounting a bar with V-shaped ends. The 

 word "Service" in this instance would be descriptive of the goods. 

 "It has a fixed meaning in trade generally as indicating that goods 

 so described are serviceable, and will notably wear well, but are 

 especially adapted to meet the requirements of the user of the 

 goods to which the mark is applied." Decision afiirmed. ('^Official 

 Gazette," August 26, 1919.) 



TREASURY DECISIONS. 



No. 43314.— Protest 931413 of The Rubber .Association of 

 America, Inc. (Seattle). 



GuTTA SiAK. — Gutta siak, classified at 10 per cent ad valorem 

 under paragraph 385, Tariff Act of 1913, is claimed free of duty 

 under paragraph 502. 



Opinion by Hay, G. A. Gutta siak was held entitled to free 

 entry as gutta-percha under paragraph 502. G. A. 8194 (T. D. 

 .37759) followed. 



INTERESTING LETTERS FROM OUR READERS. 



AN OPPORTUNITY FOR EUROPEAN TRADE. 



To THE Editor of The India Rubber World: 



DEAR SIR: — I am writing to you with the object of calling 

 your attention to the firm of Ing. Leone R. Talvy, via Vivajo 

 21, Milan, a member of this chamber, who is desirous of getting 

 in touch with American manufacturers who may be looking 

 forward to extending their business to European countries. 

 Mr. Talvy is favorably quoted here and is in a position not only 

 to cover Italy, but also Serbia, Roumania, Bulgaria, and Euro- 

 pean Turkey, being acquainted with the markets in said countries, 

 and having branch offices in Belgrade, Serbia. 



The articles in which he is more particularly interested are: 

 tubes, sheets, gloves, cushions, ice-bags, etc., and I shall greatly 

 appreciate your kindness, if you will supply Mr. Talvy's address 

 to all such manufacturers whom you may happen to know, who 

 are anxious to secure valuable connections abroad. 



This Chamber desires to thank you in advance for the favor 

 and if at any time it can reciprocate the courtesy, it will certainly 

 be glad to do so, 



Very truly yours. 

 Secretary, .American Chamber of Commerce of Italy, 

 Via Bocchetto 3. Milan, Italy. 



FOLDING FILTER PAPERS 



An improved method for folding filter papers for rapid filtra- 

 tion follows: 



Instead of tearing ofif a corner of the filter 

 paper tear a strip back as far as the fold at 

 B, and fold over on to the other side. 



This affords a double thickness nearly 



Folded Filter all around the top of paper, making it less 



Paper. possible for any fine precipitate to crawl 



over the top of paper, also preventing any air from escaping 



down along the side of the aper. ("The Chemist-.-\nalyst.") 



The Rubber Tire Supply Co., Inc., 420 East St. Louis 

 street, Springfield, Missouri, has increased its capital stock from 

 $10,000 to $20,000. 



