30 



THE INDIA RUBBER WORLD 



[October 1, 1920. 



Waterproofed Fabric consisting of a fibrous foundation im- 

 pregnated with a non-colloidal sulphur-terpene compound. (Wil- 

 liam Beach Pratt, Wellcsley, Mass., assignor to E. H. Clapp 

 Rubber Co., Boston, Massachusetts. United States patent No. 

 1,349,310.) 



VlTLCANizED ARTICLE AND PROCESS. A new manufacture com- 

 prising a fibrous bodj-, and a non-colloidal sulphur-terpene com- 

 pound bonding the rubber and fibrous body, all vulcanized 

 together. (William Beach Pratt, Wellesley, Massachusetts, as- 

 signor to K. H. Clapp Rubber Co., Boston, Massachusetts. 

 United States patent Xo. 1.349,911.) 



Article and Process of Bonding Metal and Vulcanized 

 rubber which comprises coating the surface of the metal with a 

 non-colloidal sulphur-terpene compound, placing thercagainst a 

 material to be bonded to such surface, and subjecting the struc- 

 ture to heat and pressure. (William Beach Pratt, Wellesley, 

 Massachusetts, assignor to E. H. Clapp Rubber Co., Boston, 

 Massachusetts. United States patent No. 1,349,912.) 



Pneumatic Tire and Process which consists in treating a 

 fibrous material with a non-colloidal sulphur-terpene compound, 

 forming the tire structure of rubber and the treated fibrous ma- 

 terial, and vulcanizing said structure. (William Beach Pratt, 

 Wellesley, Massachusetts, assignor to E. H. Clapp Rubber Co., 

 Boston, Massachusetts. United States patent No. 1,349,913.) 



Solid Tire and Method of Manufacture. A tire comprising 

 a rim, a solid rubber tread, and a layer of non-colloidal sulphur- 

 terpene compound uniting the tread to the rim. (William Beach 

 Pratt. Wellesley, Massachusetts, assignor to E. H. Clapp Rubber 

 Co., Boston, Massachusetts. United States patent No. 1,349,914.) 



Process for Vulcanizing Rubber which comprises applying an 

 inert gas as a vulcanizing medium to a vulcanizable plastic ma- 

 terial in a chamber communicating with the atmosphere and 

 vulcanizing the plastic material by said inert gas while preventing 

 the passage of air into the chamber by a counter-passage of gas. 

 (Willis A. Gibbons, Flushing, New York., assignor to American 

 Rubber Co., Boston, Massachusetts. United States patent No. 

 1,350,798.) 



Process for Vulc.'VNIzing Rubber comprising the addition of 

 a small quantity of a concentrated solution of a caustic alkali. 

 (Edwin E. A. G. Meyer, assignor to Morgan & Wright, both of 

 Detroit, Michigan. United States patent No. 1,350,824.) 



Tire Filler and Method of Manufacture, consisting of the 

 following ingredients in the proportions stated; 152 pounds sun- 

 flower seed oil, 32 pounds of sulphur chloride; 5 pounds of cal- 

 cium hydroxide, 4 ounces of soluble dyes, and 8 pounds of soap 

 oil. (Franc D. Mayer. Chicago, Illinois. United States patent 

 Xo. 1,351,670.) 



THE UNITED KINGDOM 



Varnish, Adhesive, and Waterproofing. A composition for 

 waterproofing of all kinds, and fabrics which may also be used 

 as an adhesive, comprises the following preparation: dissolve 

 20 parts of caoutchouc and 60 parts of cellulose acetate in 60 

 parts of tetrachlorethane. Sulphur may be incorporated in the 

 mixture to enable the coating to be vulcanized either by steam 

 or hot air, or cold, by means of chloride of sulphur. Other 

 substances may be added, such as organic or inorganic loading 

 or coloring materials, and a softening agent for the cellulose 

 acetate. (Etablissemcnts Hutchinson, 124 Avenue des Champs 

 Elysees, Paris. British patent 129,630.) 



Recovery of Volatile Solvents. In recovering volatile 

 solvents evaporating during the drying of India rubber articles 

 and the like, an absorption agent is placed in the drying cham- 

 ber, and uniformly distributed over it. The agent is preferably 

 made to flow through the chamber, and may be conducted by 

 means of rods, threads, wires, textile fabrics. The solvent is 

 subsequently recovered by distillation or other means. (H. 

 Schmidt, Cologne, Germany. British patent No. 141,739.) 



Process for Rubber Boot and Shoe Manufacture. "Am- 

 monia powder" is placed inside a cloth bag coated with gum arable 

 and shaped like a shoe. A rubber bag of similar shape is coated 

 internally with gum arable and the first bag inserted therein. 

 The two bags are sealed and placed in a shoe-shaped metal 

 mold which is then heated, when gas generated from the powder 

 by the heat causes the rubber and cloth to adhere and take the 

 shape of the mold. After removal from the mold an openmg 

 is cut for the introduction of the foot. (Y. Ose, 1 Majima-Qio, 

 Shitayu-ku, Tokio, Japan. British patent No. 142,801.) 



Treating Bark from Rubber Trees. Bark shavings are 

 ground and masticated between rollers heated to about 275 de- 

 grees F. so as to knead the rubber with the bark and convert 

 the whole into a plastic mass. The product, after mixture with 

 a vulcanizing agent and vulcanization, is suitable for the manu- 

 facture of tapping-cups, coagulating-dishes, floor matting, etc. 

 If the vulcanizing agent be added prior to" grinding, the raw 

 material may be treated in a scrap washer and creping machine 

 as for the extraction of raw rubber. (R. T. Smith, 89 Chancery 

 Lane, London. British patent Xo. 142,946.) 



India Rubber Composition. In compositions containing a 

 large proportion of caoutchouc, one or more of the compound- 

 ing ingredients is or are dispersed through a carrier liquid be- 

 fore compounding, and the liquid removed before vulcaniza- 

 tion. The liquid must be volatilizable and is preferably water. 

 The compounding ingredients may be dissolved, or in colloidal 

 solution, or suspended in the liquid. Suitable ingredients for 

 compounding are sugar, .glue, aluminum hydroxide, and barium 

 sulphate. A protective colloid such as glue may be added to 

 maintain a solid ingredient in dispersion. (H. Wade, 111 Hat- 

 ton Garden, London. [The Goodyear Tire & Rubber Co., Akron, 

 Ohio, U. S. A.] British patent No. 143,610. Same as United 

 States patent No. 1,301,639.) 



Wheel Tires. Air tubes for tires are reinforced by fabric im- 

 pregnated with a solution of Turkish birdlime. A lining of Turk- 

 ish birdlime may be applied to the inner surface of the tube. 

 (C. W. Bradley, 107, Kenilworth Court, Putney, London, Eng- 

 land. British patent No. 144.102.) 



Heavy Composition to enhance the flight of golf balls con- 

 sists of a non-rigid and elastic composition either of rubber 

 or a gelatinous compound loaded with litharge, a chemical com- 

 pound, or powdered heavy metal. In weight the material is from 

 20 to 40 per cent of the weight of the whole ball. (R. F. Hutchi- 

 son and W. Patton, Murano Works, Albert Street, Edinburgh. 

 British patent No. 144,126.) 



LABORATORY APPARATUS 

 IMPROVED BUCHNEJl FUNNEX^ 



AN improved and standardized 

 Buchner funnel is shown in the 

 illustration which embodies the sug- 

 gestions of numerous chemists. 

 Standardization has been effected in 

 the distance of plate from rim, filter 

 paper from inside wall of funnel, and 

 perforated area from edge of filter 

 paper. The result is that funnels may 

 be obtained in which standard filter 

 papers will fit without unnecessary 

 folding or loss of time in cutting. 



Filter papers may be made to lit 

 this form of funnel by shaping them 



around a wooden disk, which will se- ,-. „ „ n „ ^ 



. , . . . . . CooRS Porcelain Funnel 

 cure very quick filtration of precipi- 

 tates for quantitative work and their efficient washing. (The 

 Herold China & Pottery Co., Golden, Colorado.) 



