SEPTf;MBER 1, 1917.] 



THE INDIA RUBBER WORLD 



72i 



When the wheels are revolved in the direction indicated by 

 the arrows, two strips of uncured stock K and L are fed to the 

 upper and lower wheels, respectively, passing around guide rol- 

 lers and under idler rollers M and A^, causing the strips to ad- 

 here to the peripheral molds. The cam rings depress the suction 

 valve stems and the strips of stock are drawn into the mold 

 cavities when a pill of chemical material that will gasify under 

 heat is automatically dropped into each of the lower molds, -•'is 

 the two wheels meet, the two strips of rubber are forced to- 

 gether at the edges of the cavities and the edges severed from 

 the strip, when the action of the cam releases the vacuum and 

 applies pressure in each cavity, the completed balls remaining 

 in place until they are freed by their own weight. They are 

 then placed in molds and vulcanized in the usual manner, when 

 the gases produced by the action of heat on the chemical pills 

 serves to e.xpand the balls within the molds. [James W. 

 Brundage, assignor to The Miller Rubber Co. — both of Akron, 

 Ohio. United States patent No. 1,232,764.] 



1,234,0(35. 

 1,234,431. 

 1,234,526. 



1,235.117. 

 1,235,226. 



1,235,757. 



1,236,963. 

 1,237,131. 



176,3^0. 

 176,363. 



106,242. 



106,320. 



OTHER MACHINERY PATENTS. 



THE UNITED STATES. 

 Vulcanizer for rubber tires. C. E. Miller, Anderson, Ind. 

 Vulcanizing press. B. F. White, Rock Island, 111. 

 Machine for treating i-ubber and other heavy plastic material. 



F. H. Banbury. Ansonia, Conn., assignor to Birmingham 



Iron Foundry, Derby. Conn. 

 Repair vulcanizer, Marion X. Corbin, Savannah, Ga. 

 Machine for cutting disks of cork or similar material. \, Min- 



nemann. Delmenhorst, Germany. 

 Machine for treating rubber and other heavy plastic material. 



F. H. Banbury, Ansonia, assignor to Birmingham Iron 



Foundry, Derby — both of Conn. 

 Tire skiver. B. E. Maxwell, Wichita. Kan. 

 Method of manufacturing reinforced inner tubes and mandrels 



therefor. H. G. Welch, Philadelphia, Pa. 



THE DOMINION OF CANADA. 



Machine for building tires. The Miller Rubber Co., assignee 

 of F. F. Brucker— both of Akron. Ohio, U. S. A. 



Repair vulcanizing core. W. L. Heenig, Marion Johnston and 

 E. W. Ohls, assignees of a third interest — all of Denver. Colo- 

 rado, U. S. A. 



THE UNITED KINGDOM. 



Vulcanizer. Soc. Pour La Production ii: La Vente Des .Articles 

 en Caoutchouc "Bogatyr" and J. .\. Talalay, Bogatyr. Moscow, 

 Russia. 



Machine for folding canvas strip for engine packing. G. War- 

 wick, SO Cobbam Road. Seven Kings. Essex, and A. P. Crouch, 

 106 Cannon street, Londoa 



1,234,381. 



1,235,052. 

 1,236,049. 



1,236,183. 

 1,236,235. 

 1.236.685. 

 1,237,227. 



176,205. 

 106,270. 



THE FRENCH REPUBLIC. 



483.062 (September 30, 1916). Process for the manufacture of articles 

 containing elements formed by a plastic and a fibrous material. 

 The Rubber Regenerating Co. 



483.064 (October 2, 1916). Armored plastic material. 



PROCESS PATENTS. 



THE UNITED STATES. 

 Plastic material and process of producing same. S. J. Peachey, 



Ileaton Merso, near Manchester, England. 

 Manufacfjre of tires. R. E. Price, New York City, assignor to 



Rubber Regenerating Co., a corporation of Indiana. 

 Process of making rubber-coated leather articles. J. H. Butler, 

 assignor of one-half to F. W. .Austin — both of Gloversville, 

 N. Y. 

 Coating composition and process of making the same. H. K. 



Kiso, New V'ork City. 

 MoUifier or comforter. .-\. R. Tufts, Vancouver, British 



Columbia, Canada. 

 Process of manufacturing waterproof sheeting and the like. 



J. W. H. Dew, London, England. 

 Cushion tire and method of making the same. J. L. Swartz, 

 Akron, Ohio. 



THE DOMINION OF CANADA. 

 Process of compounding rubber and fabric. The Standard Woven 

 Fabric Co.. Framingham. assignee of F. J. Gleason, Walpole — 

 both in Massachusetts, U. S. .\. 



THE UNITED KINGDOM. 

 Plastic compositions. E. Krause, 6 Sedanstrasse, Steglitz, Ber- 

 lin, and H. Elucher, 1 Kanalstrasse, Gohlis-Leipzig, Germany. 



Convert. 



RAW MATERIAL COST ACCOUNTING IN TIRE FACTORIES. 



The accounting of labor costs has in the past received con- 

 siderable attention and study, with the result that labor cost 

 figures are not difficult to compute. This is particularly true 

 now that piece work prevails in so many factories. The 

 progressive cost of raw materials, however, has not been given 

 the consideration or thought that this important factor in manu- 

 facturing really deserves. For that reason the following dia- 

 gram and explanation are of interest : 



The smaller rubber factories rarely give enough credit to 

 wastage in their cost accounting. Raw material, of whatever 

 nature, in rubber manufacture, is undergoing a constant shrink- 



^utomobitg. Tvre :B-uild .iv m 



age from the day the car is unloaded to the time the finished 

 product is shipped. It is possible in time, from previous experi- 

 ence, to estimate a predetermined percentage for shrinkage as 

 material passes through the various departments. But to check 

 this predetermined shrinkage a system of reports should be 

 made to the cost accounting department, and rigidly adhered to, 

 thereby stopping many a leak before it reaches the proportion of 

 a flood and finally becomes disastrous. 



Referring to the dia.sjram. the solid lines between the depart- 

 ments are represented by circles and indicate the travel, step by 

 step, of the material through the various processes into the 

 finished product. The dotted lines, between the departments 

 and cost departinent represent a system of reports that are made 

 to the cost department or main accounting department, as the 

 case may be, covering what passed out of the particular depart- 

 ment making the report, and to which department the inatcrial 

 reported upon was delivered. 



Thus the main office accounting department would have ab- 

 solute control of factory costs through an accurate system of 

 accounting that would show the cost of raw materials con- 

 sumed in production, with full consideration of the shrinkage in 

 process. [The Consulting Co., Cincinnati, Ohio.] 



