January 1, 1914. 



THE INDIA RUBBER WORLD 



207 



The rewound rolls sometimes have a tendency to become 

 irregular and to bulge outwardly at the ends. In order to 

 prevent this a number of adjustable fingers are arranged at 

 one side of the rewinding shaft, so that the ends of the fingers 

 rest upon the shaft and guide the material in a straight line 

 as it is rewound. Like the cutting discs these fingers may 

 be adjusted to accommodate strips of any width. [Cameron 

 Machine Co., 57 Poplar street, Brooklyn, New York.] 



NEW MACHINES FOR FORMING RUBBER TUBES. 



A machine of new design, in which rubber tubes are built up 

 over a floating mandril, is the subject of a recent patent. By 

 reference to the drawings herewith the operation of this machine 

 will be readily understood. A sheet of thin rubber, of much less 

 thickness than the walls of the finished tube, is placed upon a 

 web or carrier A. This web is made of felt so as to allow 

 the passage of air through it and to prevent the rubber from 

 sticking to it. The sheet of rubber is carried toward the rear 

 of the machine and under the mandril B which floats between 

 two rollers C and D. Since the surface of the mandril is smooth 

 the rubber will adhere to it and be carried around as the rollers 

 continue to revolve. The rubber is wrapped around the mandril 

 until a tube of the desired thickness is formed. By means of 

 the lever E the roller F is made to press down upon the rubber 

 as it is wound upon the mandril, thus excluding all air bubbles 

 from the tube. The carrier is driven by a chain G which is 

 kept tightened by the adjustable idler gear H. In order to 

 keep the mandril pressed up against the roller F the carrier 

 A passes under a roller K which is held down by weights sus- 

 pended from the lever /-. As soon as the tube has been built up 

 to the proper thickness the hand lever E is raised, which allows 

 the mandril to travel to the rear of the machine, where the 



c::=j: 



Kremer Rubber Tube Machine. 



finished tube is removed. [U. S. Patent No. 1,078,099. F. W. 

 Kremer.] 



As a sequel to the tube building process described above, the 

 inventor of that machine has also designed another machine 

 for splicing the ends of rubber tubes, especially automobile tires, 

 by the utilization of compressed air. Briefly, the process consists 

 in clamping a short section of the tire in a mold so that the air 

 is confined in a small space, the section of the tire in the mold 

 including the ends to be spliced or vulcanized. Fig. 1 shows 

 the mold in longitudinal section, while Fig. 2 shows an exterior 

 view of the mold and the compressed air tank. The mold 

 consists of two parts, A and B between which the two ends of 

 the tire C are clamped. In order to form an air-tight chamber 

 the ends of the upper part A are provided with rubber blocks 

 D which press down upon the tube, these blocks being raised 

 or lowered by the screws E. Surrounding the mold directly 

 above the ends of the tube are steam jackets F and near the 



ends of the mold are water jackets G into which cooling water 

 is introduced. The tubes are spliced preferably at the point 

 where the air valve is located in order that the ends of the 

 tube and the rubber plate H of the valve may be vulcanized in 

 one operation. When the lube has been clamped in position, 



Kremer Rubber Tube Splicer. 



air is admitted under high pressure from the tank M into the 

 space K, through the hose jV, thus causing the tube to be held 

 firmly against the walls of the vulcanizer, which are heated by 

 the steam jacket. The cooling water prevents the vulcanization 

 of any part of the tube except that near the ends to be spliced. 

 [U. S. Patent No. 1,078,097. F. W. Kremer.] 



MACHINE FOR RECLAMATION OF RUBBER WASTE. 



The machine illustrated in the accompanying drawing is de- 

 signed for the purpose of reclaiming vulcanized rubber waste 

 and for removing from the rubber the materials which have been 

 mixed with it, such as the compounding ingredients, particles of 

 fabric, etc. The process comprises the subjection of the rubber 

 waste, after it has been cut into small particles, to the action of 

 a reclaiming solution in the presence of heat, and simultaneously 

 subjecting the rubber to the electrolytic action of an electric 

 current. 



The apparatus comprises a cylinder A containing a tank B. 

 The space between these two vessels forms a heating chamber 

 which is supplied with steam through the inlet pipe C. In the 

 lower end of the tank S is a funnel-shaped body D having a 

 zinc cylinder E attached at its upper end. The lower end of 

 this funnel is closed by a valve F which is operated by the lever 

 C. In order to provide a means for circulating the materials 

 through the tank, the pipe H extends from the lower part of 

 the funnel D, out at the side of the tank, and around to the 

 lower end at /. .A. propeller / operated by a pulley on the shaft 

 K is inserted in the pipe H to force the circulation. 



In carrying out the process a sufficient quantity of the 'waste 

 material is placed in the tank to cove'- the pipe H. the valve F 



