Ai-RiL 1. 1920.) 



THE INDIA RUBBER WORLD 



429 



RiBBER Com POSITION ANn Process for the Production thereof, 

 comprising an admixture of a vulcanizablc plastic and rubber 

 seed pulp. (Edward Mark Slocum, Medan, Sumatra, Dutch 

 East Indies, assignor to General Rubber Co., New York City. 

 United States patent No. 1.332.926.) 



THE DOMINION OF CANADA. 



Rubber TRE.-^Ttxn Process. Consisting in reducing waste vul- 

 canized rubber to a finely divided state ; adding a small quantity 

 of new unvulcanized rubber in sufficiently dilute solution to pro- 

 duce a very thin film over the vulcanized ground waste ; driving 

 off the solvent and forming and vulcanizing the mixture in the 

 usual manner. (The City Trust Co., assignee of Joseph Porzel, 

 both of Buffalo. X. Y., U. S. A. Canadian patent Xo. 196,948.) 



W.'iTERrROOFiNG COMPOSITION Consisting of paraffine wax, 

 dissolved rubber, a resinous substance dissolved in alcohol, a 

 light hydrocarbon oil and carbon bisulphide. (The Gary Water- 

 proofing Corp., Chicago, Illinois, assignee of Guy Madison Gar- 

 lick. Kalamazoo. Michigan, U. S. A. Canadian patent No. 

 197,340.) 



Waterproofing Process, which comprises heating a mixture 

 of melted wax, resinous substance and dissolved rubber to 305 

 degrees F., and al varying specified suitable intermediate tem- 

 peratures adding a resinous substance dissolved in alcohol, light 

 hydrocarbon oil. and carbon bisulphide (The Gary Waterproof- 

 ing Corp., Chicago, Illinois, assignee of Guy Madison Garlick. 

 Kalamazoo, Michigan, both in U. S. A. Canadian patent Xo. 

 197,341.) 



THE UNITED KINGDOM. 



Le.\ther Compositions for making boot soles, coating canvas 

 for printers' blankets, upholstery, etc. The following proportions 

 by weight may be used : 16 rubber, 20 leather flour. S calcined 

 magnesia. 3 sulphur, 3 brown factice, or for a hard vulcanite 

 material, i2 rubber. 60 leather flour, 16 sulphur and 14 magnesia. 

 After mixing, the temperature of the rolls is raised to effect 

 partial vulcanization and the material is finally passed to calen- 

 der rolls prior to complete vulcanization in a platen press or an 

 open live-steam press. ( W. Drury, 10 Lena Gardens, Shepherds 

 Bush, London. British patent Xo. 135,921.) 



VuLc.\NiziNC Rubber. Xitrosobenzene or a similarly consti- 

 tuted nitroso-hydrocarbon of the cyclic series is used as an 

 accelerator in the vulcanization of rubber. As an example, 100 

 parts of rirbber are mixed with ten parts of sulphur and 0.5 parts 

 of accelerator. (S. J. Peachey, 5 Yew Tree Road, Davenport. 

 Stockport, England. British patent Xo. 136.716.) 



Rubber P.wing Sl.abs or Tiles are formed with a wearing sur- 

 face of soft rubber composition and a foundation of hard rubber 

 composition. The tiles may comprise a plurality of layers vary- 

 ing in hardness from top to bottom, and the bottom layers may 

 be formed wholly or mainlv from ground waste rubber. As an 

 example the bottom layer may he formed from a mixture of five 

 parts of ground rubber waste with two parts of sulphur, and the 

 top layer of ground rubber alone. (Grimston Tyres, Limited, 

 The Camp, St. .Mbans. Hertfordshire, and J. F. Cooper, Ivy 

 Collage. Port \'alc. Hertford, both in England. Britisli patent 

 N'o. 137,117.) 



THE FRENCH REPUBLIC. 



SunsTiTiTK FUR RrmiKR. (W A. Rosa. (French patent 

 498.071.) 



Process for Reclaiming Benzine or Other Solvents em- 

 ployed in the rubber industry. (Societe .^nonyme des Anciens 

 Etablissements. J. B. Torrilhon. French patent No. 498,464.) 



GERMANY. 



Process for Regenerating Rubber Scrap. The material is 

 heated with water under a pressure of 200—600 atmospheres 



at 210 degrees C, and in presence of alkaline substances such 

 as caustic soda. Free and also combined sulphur as well as 

 organic and inorganic filling materials are more completely re- 

 moved than by existing processes, and the rubber is not affected. 

 (W. North and H. Loosli, Hanover. German patent No. 313,554.) 



Production of Highly Elastic Vulcanizates from Synthetic 

 RuiiBER. Middle tar oil is incorporated with synthetic rubber 

 prior to vulcanization, and imparts a high degree of elasticity to 

 the final product. From three to five times the proportion of the 

 customary "elasticators" is easily incorporated, the saturation 

 limit being 150 — 200 per cent. (Mittledeutsche Gummiwarenfabrik. 

 L. Peter, Frankfort. German patent No. 315,321.) 



Process to Coagulate Rubber L.\tex. (Francis Alban Byrne, 

 Birmingham, England. German patent Xo. 320.170.) 



AUSTRALIA. 



Caoutchouc. (F. Phillips, assignor to The Goodyear Tire 

 it Rubber Co. .\ustrahan patent Xo. 8621.) 



T 



LABORATORY APPARATUS. 



METALLIC SPARK SAFETY GAS LIGHTER. 



HE .metallic spark GAS LiGhTKk of till.' lurin comninii ill domes- 

 use is a decided 



convenience much appre- 

 ciated in the laboratory 

 where it will quickly 

 light all kinds of gas, 

 gasoline, acetylene and 

 alcohol stoves, b 1 o w- 

 torches, mantle burners, 

 gas jets and solid alcohol 

 street, Chicago, Illinois.) 



Safety Gas Lighter. 

 (Xational Liter Co., 702 Fast 63rd 



THE FISHER ABSORPTION BOTTLE. 



.\ new form of absorption bottle described as "a \'-tube passed 

 through the fourth dimension," is here illustrated. This appa- 

 ratus h;.s the same absorption qualities as the U-tube. The 



principle of 

 _ design is 

 ^'"Bam the same, 

 but the 

 arms, in- 

 stead of be- 

 ing along- 

 side of each 

 other, are 

 placed one 

 inside of 

 the other. 

 This bottle 

 is very de- 

 sirable in 



.\ Rapid Absorption Bottlf. any combus- 



tion work 

 where dry reagents &re used and has proved of particular value 

 in rapid organic work. One turn shuts off inlet and outlet and 

 also chamber A from B. It is easily charged and cleaned : is 

 small, compact, light in weight, and stands solidly on the balance 

 pan. (Fimer & .^mend, 211 Third avenue. New York City.) 



The Bureau of Standards is encaged in the extensive 

 project of developing standard specifications for all classes and 

 types of rubber goods. Specifications for pneumatic tires and 

 cotton jacket fire hose have already been submitted to the trade 

 for suggestions. Work on surgical goods, tubing, rubber stop- 

 pers, etc.. is under way. 



