318 



THE INDIA RUBBER WORLD 



[March 1, 1914. 



upon the outer periphery of the stock carrier /. This carrier 

 is in the form of a large gear having gear teeth A'. This gear 

 is revolved by the pinion L on the shaft M, which is driven by 

 a belt N through a suitable worm gear speed regulating device 

 from the electric motor O. This allows the stock carrier to be 

 revolved on the rollers / at different speeds. 



The mechanism for applying the successive layers of fabric to 

 the core is arranged as follows : Secured to the inner face of 

 the stock carrier / is a bracket which carries the roll of stock 

 P. This roll of water-proofed material is wound up with alter- 

 nate layers of muslin for keeping the stock from sticking. As 

 the stock is unwound from the bobbin the muslin is wound up 

 on the roller Q. Also secured to the inner face of the stock 

 carrier / are brackets carrying rollers R and 6" as well as three 

 small idler rolls. The rollers R and i" are connected with a 

 chain T passing over sprockets on the shafts of the rollers. The 

 sprockets are of different size, so that the two rollers must turn 

 at different speeds. When a tire is to be formed around the 

 core, the fabric from the roll P is threaded around the idler rolls 

 and then applied to the outer surface of the core. The stock 

 carrier J revolves in the direction indicated by the arrow, and 

 the constant speed of the rollers R and i" insures a uniform 

 tension on the fabric. In order to remove air bubbles from 

 underneath the fabric and to spread it evenly, a spring pressure 

 roller U is employed. Also, in order to perform the operation 

 of stitching, which is the ironing" or rolling of the strip of fabric 

 along the lateral surfaces of the core, a pair of rollers V are 

 used. To control the movement of these rollers over the surface 

 of the fabric a system of levers ((', operated by the hand lever 

 X throu.qh sliding collars on the shaft B, is installed. By this 

 mean? tlie rollers may be held nulward against the pressure of 

 the spring >'. [United States Patent Xo. 1.080.683, issued Decem- 

 ber 9. 1913. to Charles A. Edmonds, of .-^kron, Ohio.] 



A RUBBER SKIVING MACHINE. 



In the accompanying drawing is shown a machine recently 

 introduced to the rubber trade. This machine is designed for 

 skiving or tapering the ends of rubber tubes which are to be 

 spliced. This applies particularly to the inner tubes of auto- 

 mobile tires. The cutting mechanism comprises a circular 

 knife carried on an arbor which rotates at a speed of 2,000 

 revolutions per minute. It will be seen from 

 the drawing that the machine is of extremely 

 simple construction. The circular knife A is 

 turned by power applied to the belt pulleys B, or 

 by means of an electric motor C directly con- 

 nected with the arbor shaft. The rubber tube is 

 inserted through the centre of a brass arbor D 

 and the end of the tube is folded back over the 

 tapered end of the arbor. This stretches the 

 tube so that it is slightly larger in diameter at 

 the end than at the place where it is folded over 

 the arbor. The sliding carrier E of the arbor D 

 is now moved toward the revolving cutter A by 

 raising the operating lever F. This moves the 

 tube forward into the knife, cutting away the 

 rubber and giving the end of the tube a gradual 

 taper. Water is supplied to the work through 

 a pipe G in order that the rubber may be more 

 easily cut and to keep the material and the cutter 

 from overheating. .-X tray H is fastened to the 

 frame of the machine underneath the cutter to 

 catch the waste water and to drain it away from 

 the machine. [Allen Machine Co., Erie, Pa ] 



THE SHAW HYDRAULIC TIRE PRESS. 



The hydraulic press shown in the accompanying illustra- 

 tion is a special type of press recently placed on the British 

 market. This apparatus is designed for pressing solid band 

 tires on wheels or rims and it may be used cither in the 

 garage or the factory. The frame work consists of steel I- 

 beams riveted together and arranged so that the lower beams 

 form a foundation for the hydraulic cylinder. Pressure is 

 obtained for raising the table on the upper end of the ram by 



Hydr.\ulic Tire Press. 



means of a set of pumps with both high and low pressure 

 cylinders. The press is made in three sizes, with 10, 12 and 

 14-inch rams working at a pressure of 200 pounds per square 

 inch. At one side of the press is a runway girder forming 

 an overhead track for a lifting block and chains, by means 

 of which heavy wheels and tires maj' be easily lifted upon 

 the plunger table. The press can be fixed in any position 

 where a solid floor is available, since no foundation is re- 

 quired other than that which forms a part of the machine 

 itself. [Francis Shaw & Co., Manchester, England.] 



The collapsible shaft made by the Cameron 

 Machine Co., of Brooklyn, and placed on trial in 

 factories at that company's expense, is in active 

 request among the rul)l)er mills nf the c .liiury. 



The .^li.en Skjving Machine. 



