40 



THE INDIA RUBBER WORLD 



[October 1, 1914. 



closed by a steam cylinder whose piston has an extension for 

 operating a rheostat, for controlling an electric coil which sup- 

 plies heat for vulcanization. 



IMPREGNATING BRAIDED HOSE. 



No. 1.110,071, September 15, 1914. Henry Z. Cobb, Win- 

 chester, Massachusetts. An apparatus for passing the thread 

 through a rubber solution to impregnate it before being woven 

 into hose. The woven hose subsequently passes through a die 

 to remove the surplus material. This patent constitutes an im- 

 provement on Cobb's patent No. 1,002,644 of 1911. 



TIRE VULCANIZING PRESS. 



AMI ING the recent inventions in the field of rubber manu- 

 facturing machines is the tire vulcanizing press illustrati d 

 herewith. This vulcanizer is very simple both in construction 

 and operation. The tires are first built up and placed in molds 

 A, which are laid one above the other on the table B mounted 

 on the hydraulic ram C. Each mold has a pipe D running from 



Dees' Tire Vulcanizer. 



the interior of the tire to a valve E. These valves are all con- 

 nected by flexible pipes F communicating with the outside of 

 the vulcanizer through a flexible pipe G, having three valves, 

 H, I and /. Each mold also has a tube K with a valve L. 



When the molds are in place and compressed by raising the 

 hydraulic plunger C, the valve // is opened and cold water is 

 let into the tires until they are filled, when it runs out through 

 the tubes K, closing the valves L. The valve H is then closed 

 and steam is admitted to the vulcanizer through the pipe .1/. 

 As the water inside the tires becomes warm by the heating of 

 the molds, it expands and exerts an outward pressure on the 

 tires. At the proper time the valve / is opened and the pressure 

 of the steam opens the valves L, forcing the water out of the 

 tires and filling them with steam. The valve / is then closed and 

 the steam valve / opened, producing a pressure in the tire greater 

 than that in the surrounding vulcanizer. This pressure is main- 

 tained until the curing process is complete. The principal ad- 

 vantage claimed for this apparatus is in the pressure exerted on 

 the interior of the tire by gradually raising the temperature of 



the water. [Pat. No. 109,048, Sept. 1, 1914, M. A. Dees, St. 



I .Mitis, Missouri.] 



A BOLTLESS QUICK-OPENING VULCANIZER. 



' | 'HE new boltless quick-opening vulcanizer head, manufactured 

 *■ li\ the Williams Foundry & Machine Co., Akron, Ohio, 

 and illustrated herewith, presents several novel improvements. 

 The cast-steel shell ring and door have each a series of pro- 

 jecting lugs The door is turned, by means of an iron bar in- 



The Williams Boltless Vulcanizer. 



seited into one of the projections, so that its lugs are forced 

 under the lugs of the head-ring. This makes it impossible for 

 the door to be forced outward. The door rotates on a trunnion 

 at its center, which is a part of the cast-steel door hinge, per- 

 mitting it to be swung open like any ordinary vulcanizer head. 

 Stops are provided so that the operator is always sure to have 

 the door in the proper position before the steam is turned on. 



When steam is turned into the vulcanizer and the pressure 

 raised to from one to three pounds, the wedge-shaped, auto- 

 matic rubber packing effectually seals the joint against the escape 

 of steam. There is not a bolt or nut to tighten, and the greater 

 the pressure, the tighter the joint. 



The points of advantage claimed for this head are a great sav- 

 ing of time, ease of operation and safety. The head is adapted 

 to be applied to the old bolted type of vulcanizing cylinder. 



BERTRAMS' ROLL BUFFING MACHINE. 



THE accompanying illustration shows a machine designed for 

 buffing and polishing calender and mill rolls, or any other 

 rolls which require a smooth, even finish. On the heavy bed 



of the machine are V-shaped slides, over which travels the car- 

 riage carrying the buffs. The buffs are driven by belts from a 



