146 



THE INDIA RUBBER WORLD 



[December 1, 1913. 



special winder has been designed, which stretches the bandage 

 tightly around the spindle and passes it through water at the 

 same time. Any desired amount of tension may be obtained in 

 placing the tape around the tread, merely by adjusting the ten- 

 sion of the friction rolls. [R. G. Rossman, Seattle, Washington.] 



NEW HYDRAULIC PRESS FOR FILLING TIRES. 



The niacliine shown in the accompanying illustration is a new- 

 type of hydraulic press recently designed for filling automobile 

 tires with a rubber compound or substitute for air, thereby pro- 

 ducing a practically solid tire which is resilient and free from 

 the disadvantages of the pneumatic. The press forces tlie mate- 

 rial in liquid form into the inner tube under the same pressure 

 as that used for filling with air. In a short time the liquid 

 solidifies and forms a very soft but resilient core for the tube. 

 The illustration shows the machine lilted with connections for 

 filling eight tubes at the same time. 



One side of the cylinder is connected by a pipe witli llic recep- 

 tacle in which the filling material has been mixed. When the 

 plunger rises it sucks this material into the hydraulic cylinder 

 and a check valve prevents it from returning to the supply tank. 

 From the cylinder it is forced into the tire through a small rein- 

 forced rubber or flexible metal hose. I here is a short connection 

 between the end of the hose and the tire, which is shut off after 



HvDR.\ULic Press for Filling Tires with Rubber Comtound. 



the tire is filled to the desired pressure to prevent the liquid from 

 escaping until it lias had sufficient time to solidify, after which 

 the hose is removed and the cap placed on the tire in the ordi- 

 nary manner. 



The press is provided with double-acting valves, and is well 

 suited to the requirements — such as the variable pressures — 

 necessary in this kind of work. Each hose connection is pro- 

 vided with a gauge, by means of which different sized tires may 

 be filled at the same time and the operation stopped w-hen the 

 desired pressure has been reached. This is said to be the only 

 press of its kind ever Iniilt. and is designed especially for this 

 class of work. fThe Hydraulic Press Manufacturing Co., Mount 

 •Gilead. Ohio.] 



NEW FORM OF STEAM VITLCANIZER. 



We describe briefly herewith a recent French invention re- 

 lating to a new form of steam vulcanizer for repairing casings 

 of automobile tires. In this vulcanizer the boiler is formed by 

 the mold itself, thus doing away with the usual intermediate 



tubing between 

 mold and boiler 

 and the consequent 

 condensation of the 

 steam. The appa- 

 ratus consists prin- 

 cipally of the mold 

 .!, which on the in- 

 side conforms to 

 the shape of the tire. 

 The walls of the 

 mold are hollow, 

 constituting a steam 

 boiler B. The de- 

 vice is set on cast 

 iron legs which are 

 provided with lugs 

 C C for attaching 

 gas, alcohol or other 

 burners. The heat 

 generated forms 

 steam in the boiler 

 and heats the walls of the mold, especially the interior wall 

 with which the tire is in contact. In order that the surface of 

 the tire be pressed firmly against the mold, two screw presses 

 are mounted in the stirrups D attached to the sides at E, so 

 that they press down on the plate F resting on a pad G. This 

 pad may consist of a small bag of sand which will easily con- 

 form with the contour of the tire and hold it firmly against 

 the hot surface of the vulcanizer. The device is provided with 

 fining funnel, overflow valve, steam pressure gauge and safety 



Ste.\.m Vulcanizer with S.\nd 

 Templ..\te. 



B.\G 



A RAMLESS HYDRAULIC PRESS. 



In England, during the past year, there has been brought out 

 what has been termed the "Pistonless" hydraulic press. While 

 this name describes the machine in comparison with the usual 

 plunger type, the cover of the working 

 cylinder really performs the functions 

 of a piston. The cylinder is made col- 

 l.ipsible, and when subjected to an in- 

 ternal pressure it extends and provides 

 the power for which the press is em- 

 iiloyed. The cylinder is formed of a 

 number of steel rings connected by a 

 flexible steel fabric which is water- 

 proofed on the inside by means of a 

 coating of rubber. Such a construction 

 provides flexibility and allows a pres- 

 sure of 150 pounds per square inch to 

 be carried w-ith safety. The principal 

 advantage pointed out for such a sys- 

 tem is that a cylinder of larger diam- 

 ' ter can be employed than is possible 

 w'ilh the ordinary plunger press. With 

 the collapsible cylinder the amount of 

 power required to overcome the internal 

 friction is very small and consequently 

 low water pressure can be employed. 

 A force of 2 tons may be obtained with a cylinder 24 inches in 

 diameter, acted upon by a water pressure of only 10 pounds per 

 square inch. The illustration show's a machine having a cylin- 

 der of 2 gallons' capacity, capable of producing a working pres- 

 sure of 10 tons. [R. A. Lister, Limited. Dursley, England.] 



The Lister R.\mless 

 Press. 



