J ,Nl AKY 1. 1915.] 



THE INDIA RUBBER WORLD 





placed on the casing and the bead cores pressed in position, alter 

 which the rings are removed and fabric stretched over the cores. 

 A sliding plate on the left of the core supports a hook-shaped 

 swinging arm carrying two trimming knives which trim the edges 

 of the casing. The tire and core are then removed from the 

 machine and placed in a mold or wrapped for vulcanization. 



In another patent tile molds are first tilled and natir applied 

 under pressure to tin- interior of the lire. They are then 

 pended from a track in a horizontal vulcanizer, and conn., t. i 

 flexible hose and. couplings to a manifold and drain pipe. The 

 subsequent operations are practically the same as just described. 



CRESWICK'S DEVICE FOR PAINTING GOLF BALLS. 



McLEOD'S TIRE MOLDS AND VULCANIZER PRESS. 



' I 'HE invention illustrated comprises a live steam chamber, a 

 ■*• hydraulic press and tire molds with connections so thai 

 water under pressure is admitted to tin interior ..i the tire 

 casing during vulcanization. 



In use a tire is placed in the mold with the annular ring be- 

 tween its edges, forming a tight joint. Through this ring ex- 

 tends a valve which automatically discharges water or admits 

 steam to the interior of the tire. The ring also supports a nozzle 

 that delivers water under pressure to the interior of the tire. 

 The mold is then placed on the ram platen and connected to the 

 water inlet, and the succeeding molds arc stacked and connected 



"TMIF principal features are two wood or metal discs with cir- 



* cular grooves lined with rubber, and when placed one 



the .tiler they form a ball race. The upper disc i- re- 



— A 



— — ^— - 



A — Upper Disc. 

 1 I ower Rubber 



1! — Lower liisc. 

 Lined Groove. E- 



C — Upper Rubber Li:.. 



-Screw for Attaching to . Vertical 



evolved and the lower is stationary. Paint i- applied to the 



grooves and the golf balls are placed in the lower disc groove. 



"~^ The upper disc groove is then brought down in contact with the 



balls. When the upper disc is revolved the balls are rotated, 



distributing a coat of paint evenly over the surfact s 



A — Tire. B — Two Part Mold. C — Annular Ring. D— Automatic Valve. 

 E — Water Nozzle. F — Water Inlet Pipe. G — Water Receiver. H — Flexible 

 Coupling. 



together by flexible pipes and couplings. The press is then closed 

 and pressure applied to the molds. Water under pressure is ad- 

 mitted to the interior of the tires, stretching the fabric, while the 

 air is discharged through the automatic valve. Live steam is 

 turned into the press chamber. This heats the water in the 

 molds, and the tire is then cured both inside and out. When 

 the cure is complete, steam from the molds is exhausted at the 

 outlet pipe assisted by the steam pressure in the heater acting 

 through the automatic valve. 



DOUGHTY'S TIRE MAKING MACHINES. 



IfEXRY J. DOUGHTY, who is well known in the rubbei 

 1 industry, especially as a designer of tire and footwear 

 machinery, has recently been granted several patents on a series 

 of machines and a process for making pneumatic tires. 

 What he claims specifically is that he has evolved the first con- 

 tinuous process for making and curing pneumatic tires by ma- 

 chinery. 



In the first place, a special loom weaves a strip of fabric, loose 

 in the middle and heavy at the sides. This is woven on a slight 

 curve. These strips are frictioned on a calender that has concave 

 and convex rolls. From the calender the strip is lead automatic- 

 ally to the tire core, around which it is wound — once for single, 

 twice for double, three times for triple plies, etc. While this 

 winding goes on strips are applied for beads, etc. The tire tread 

 is then added and the tire placed in a collapsible tread press that 

 cures it some twenty minutes. Tires have been tested in Provi- 

 dence, where his plant is located, and have stood up with the 

 best. In the illustrations Fig. 1 shows two views of the calender, 

 that on the left being a front elevation, and that on the right a 

 plan view showing the machine in connection with the tire core, 

 on which the frictioned strip is wound as it leaves the rolls. The- 

 middle roll is convex while the upper and lower rolls are con- 

 cave, the contour being such as to shape the strip passing 

 through. The middle roll is driven faster than the others to 

 friction the rubber into the fabric. 



Referring to the right-hand drawing, the fabric D is fed to 

 the calender by worm-shaped stretching rollers E, and then 

 passes between rolls B and C, where the rubber, being fed be- 

 tween rolls A and B, is frictioned into it. On leaving the cal- 

 ender the edges of the fabric are gripped between two pairs of 

 spiked belts, F, set at diverging angles to stretch the weft threads 

 of the strip. It is then wrapped, while still warm, on the col- 



