April 1, 1917.] 



THE INDIA RUBBER WORLD 



395 



173,343. Tire building machine. Canadian Consolidated Rubber Co., Lim- 

 ited, Montreal, Quebec, assignee of G. F. Fisher, Roselle, New 

 Jersey, U. S. A 



173,425. Wrapping machine for hose. Canadian Consolidated Rubber Co., 

 Limited, Montreal, Quebec, assignee of H. Z. Cobb, Win- 

 chester, Massachusetts, U. S. A. 



THE FRENCH REPUBLIC. 

 481,607 (April 27, 1916). Improvements in a machine for the manufacture 



of tires. The Hartford Rubber Works Co. 

 481,795 (May 16, 1916). Mold for the manufacture of rubber heels. J. G. 



Eufford. 



PROCESS PATENTS. 



MAKING CORD TIRE FABRIC. 



DY this method cord fabric may be made in lengths greater 

 '-' than can be obtained by cutting standard cord fabrics on 

 the bias. Referring to the drawing, A is a cylindrical drum on 



which a single layer of 

 cord B, B is wound in 

 close contact. The drum 

 can be of any reason- 

 able diameter so that 

 fabric of great length 

 may 1)e produced. When 

 a layer of cord has been 

 wound on the drum, a 

 coating of rubber solu- 

 tion is applied that serves to hold the threads together. The 

 drum is then revolved at high speed and the layer of fabric cut 

 into spiral bands of the required width, as shown at C, C. 



After cutting, the cotnpleted bands, in which the strands lie 

 at an angle of 45 degrees, are removed from the drum and em- 

 ployed in building cord tire casings in the usual way. While 

 only one layer is shown, it is obvious that two or more layers 

 may be applied to the drum, rubber solutioned and cut in the 

 above described manner. [Ernest A. Pye, Newark, New Jersey, 

 assignor to Musselman Cord Fabric Co.. Chicago, Illinois. United 

 States patent No. 1,217.879.1 



Semi-Metallic Packing. Fifty to 75 parts, by w-eight, of fiber, 

 10 to 30 parts of rubber or other gum, 10 to 30 parts of shredded 

 metal, and 5 to IS parts of filler are thoroughly mixed together 

 at the required temperature, and the mass rolled into sheets. 

 Thick sheets are built up from a plurality of thin sheets secured 

 together by rubber cement, the sheets being laid, with the shreds 

 of metal lying in different directions. [Louis J. Ryan, assignor to 

 the Royal Equipitient Co. — both of Bridgeport, Connecticut. 

 United States patent No. 1.215,064.] 



Cushion Tire. The body and tread are formed of granu- 

 lated rawhide impregnated with rubber and the inner tube is made 

 of mercerized rubber-treated fabric of special weave. [Albert H. 

 Henderson, assignor to the Henderson Rubber Co. — both of Bal- 

 timore. Maryland. United States patent No. 1,215,275.] 



OTHER PROCESS PATENTS. 



THE UNITED STATES. 



1,216,654. Method of vulcanizing rubber. W. B. Burke, assignor to The 

 Burke Process Co. — both in Cleveland. Ohio. 



1,218,350. Method of impregnating woven belts and conveying-bands with 

 balata. H. W. Anderson, Odense, Denmark. 



1,218.949. Process of treating rubber. E. E. .'\. G. Meyer, assignor to 

 Morgan & Wright — both of Detroit. Midi. 



THE DOMINION OF CANADA. 



173.169. Process of m.iking hard rubber articles. Canadian Consolidated 

 Co.. Limited. Montreal, Quebec, assignee of H. Weida. High- 

 land Park. New Jersey, V. S. A. 



173,026. Process of making hollow rubber articles. Canadian Consoli- 

 dated Rubber Co.. Limited. Montreal. Quebec, assignee of N. 

 D. Crawford, Elizabeth, New Jersey, U. S. A. 



173,344. The process of manufacturing hose. Canadian Consolidated Rub- 

 ber Co.. Limited. Montreal. Ouebec, assignee of A. E. Hop- 

 kins, Cleveland, Ohio. V. S. A. 



THE FRENCH REPUBLIC. 

 481.851 (.\ugust 23. 1915). Process for the recovery of casings especially 



^ non-skid tires. L. B. Becker. 



481,544 (.\pril 19. 1916). Process for impregnating fabric with gutta 

 percha. balata. or other similar substances, .\ktieselfcabel 

 Roulunds Fabriker. 



MISCELLANEOUS PATENTS. 



THE THROPP PNEUMATIC CUSHION TIRE. 



IT is claimed that the qualities of the pneumatic tire are com- 

 * bined with the well-known advantages of the cushion tire in 

 this invention. Moreover, the tire is permanently attached to 



the rim with a hard rubber com- 

 pound, and is vulcanized by the 

 open cure, wrapped tread process. 

 Referring to the illustration, a 

 transverse section of the tire in 

 its mold. A, is the rim on which 

 is first placed a layer of a hard 

 rubber compound, and a strip of 

 frictioned fabric B being circum- 

 ferentially laid thereon. Another 

 layer of rim compound is then 

 applied and a second fabric strip 

 C superposed, followed by still 

 another layer of rim coinpound, 

 over which is placed a third fabric strip D. The rim is then 

 filled to the level of its edges with rim compound, on which is 

 laid a layer of softer 'compound followed by fabric strips £ and i?. 

 The air valve G of the inner tube H is then forced through 

 the opening in the rim and inflated sufificiently to hold its cir- 

 cular form. After a layer of soft compound is laid around 

 the inflated tube, the fabric strips E and F are formed around 

 It. and a second layer of similar compound superposed and 

 covered by the outer edges of the fabric strip D. Then a third 

 layer of compound is applied and covered by the fabric strip C, 

 followed by a fourth layer covered by fabric strip B. 



More compound is then laid on, including a breaker strip and 

 tread portion when the tire is placed in the mold, wrapped and 

 vulcanized. [Peter D. Thropp, assignor to the De Laski & 

 Thropp Circular Woven Tire Co.— Trenton, New Jersey. United 

 States patent No. 1,217,665.] 



A FRENCH PUNCTURE-PROOF TIRE. 



The object of this invention is to eliminate the usual tread 

 and breaker strip in the construction of pneumatic tires. The 

 casing is built up in the usual way, but without the tread, how- 

 ever, and is afterwards 

 cured in the ordinary 

 manner. 



The tread band A, 

 shown in the upper illus- 

 tration, ig an annular 

 sheath of sheet metal 

 that is slipped over the 

 tire before inflation, be- 

 ing centered and held in 

 place after the tire is in- 

 flated by the annular, 

 median groove B. The 

 metal band completely 

 covers the tread and the 

 sides extend down far 

 enough to protect the 

 tire against puncture. The sides are also far enough away to 

 allow the expansion and contraction of the tire while in use. 

 Both sides of the band are perforated around their entire cir- 

 cuiTiference; a few of these perforations are shown at C, which 

 are intended to prevent the accumulation of mud and dirt. 



To prevent the band from slipping off the tire in case it 

 should become deflated, six pairs of metal clips D, shown in 

 the lower drawing, are removably attached to the riin by 

 transverse bolts. A modification consists of a solid rubber 

 tread E, vulcanized to a metal rim F welded or riveted to the band 

 B. [R. de Prandieres. French patent No. 481.350.] 



