454 



THE INDIA RUBBER WORLD 



[May 1, 1917. 



New Machines and Appliances. 



BUBBER SOLUTION MACHINE AND ASBESTOS COMPOSITION MIXEE 



Till-: ailaptatiuii of the principlo of tlic "Universal" type of 

 mixing machines to the construction of rubber solution and 

 asbestos composition machines has proved to be very 

 successful. By specially designed blades tlie materials to be mixed 

 are thoroughly kneaded and kept in constant motion in the 

 trough, resulting in a homogeneous product within a compara- 

 tively short time. 



The solution mixer shown in the illustration is built in two 

 different types, one with gears on one side that is used for 

 medium and soft grades of rubber, and the other with gears on 

 both sides of the trough and adapted for hard grades of ruliber. 

 The trough is made of sheet iron and the machine is provided 

 with a hinged wrought iron cover to prevent the escape of 

 solvent and with corners or internal lips that the material may 

 be discharged into an ordinary sized vessel. 



If desired the machine may be provided with an arrange- 

 ment to drive it at a slow speed or a high speed. The slow 



starts at once and is maintained by a patented system of cir- 

 culation which continues without attention until the cakes are 

 completely dissolved. 



speed is generally used at the beginning of the operation when 

 the material is of a stiffer consistency, and the fast speed for 

 the end of th.e operation, when the material is more of a syrup- 

 like consistency. Furthermore, tlie trough may be jacketed for 

 heating or cooling purposes. 



For compositions containing asbestos tliat are used in making 

 Klingerit type packings a special machine is constructed. The 

 trough of this type is made of cast iron, has a toothed saddle 

 and the blades are protected with serrated shoes. This ar- 

 rangement is of great advantage as it separates the fiber of the 

 asbestos without breaking it. [Werner & Pfleiderer Co., Sagi- 

 naw, Michigan.! 



AUTOMATIC CAUSTIC SODA DISSOLVER. 



In The India Rubber World of January 1, 1917, it was sug- 

 gested that a process used in the textile industry could be used 

 to advantage in rubber reclaiming plants. The pertinence of the 

 suggestion is here shown in the illustration of an apparatus that 

 has been designed for the use of rubber reclaimers. 



The operation is entirely automatic and extremely simple. The 

 iron drums are stripped from the cakes of caustic soda, which 

 are placed on the grid in the hopper. The tank and dissolver 

 is then filled with clear cold water so that the cakes are sub- 

 merged to a depth of about 6 inches. Solution of the caustic 



Solutions of any required strength may be made without the 

 use of steam or compressed air and there are no moving parts 

 requiring power for their operation. No attention is necessary 

 other than the initial charging of the apparatus which will auto- 

 matically eft'ect complete solution of the caustic in' about five 

 hours. The dissolver can also be charged at night with the as- 

 surance that the solution will be ready for use in the morning. 

 For hot solutions a thermo syphon attachment is provided. 

 [The Walter E. Lummus Co., Boston, Massachusetts.] 



MACHINE FOE CUTTING BEADS, BELTING AND PACKING. 



The development of new machinery of special design continues 

 to mark the steady progress being made as the rubber industry 

 expands. 



The accompanying ilkistration is that of a recently developed 

 machine which may be used for cutting belting and other heavy 



