February 1, 1921 



THE INDIA RUBBER WORLD 



341 



the center ui the tread down to the toe of the bead. The bead 

 molds are machine finished and polished and made to fit accu- 

 rately all tires of their respective sizes. Bead molds are all 

 made of the same diameter. The flat tread tire molds are made 

 in 6, 7 and 8-inch sizes only, and can be 

 atiachcd to a separate steam generator when 

 desired. However, the round tread 

 .nold nil.- be used to cure flat trea:I 

 t!;cs by mailing negative pad; t) 

 preserve die tread ;;attern. Mar'-;'ng 

 (if t!io fires at tnc end of the mold 

 is eliminated because the 



Tri'CK Tire \ iic.wizKk 



d anictcr of the reducing 

 shells is milled to con- 

 form to the circle of eacli 

 resi)ective tire. 



The vulcanizer can be 

 used as a self-contained 

 unit generating its own 

 steam, by means of gas, 

 gasoline or kerosene port- 

 able burner outfits. By eliminating the burners, and running 

 an inlet pipe at the top and an outlet pipe of the steam line at 

 the bottom on the other side, it can be connected to a separate 

 steam supply. The additional fittings consist of a steam gage 

 with safety valve, filler valve for the generator, water level 

 valve or indicator. The frame-work is of heavy cast iron. — .^uto 

 Tire \'ulcanizing Co.. Inc., Lowell, Massachusetts. 



RUBBEJl FOOTWEAR REPAIR VULCANIZER 



A device of interest to both the tire repair man and the pro- 

 gressive cobbler is the vulcanizer shown herewith for the repair 

 of rubber footwear, inner tulies, hot-water bottles, etc. It opens 

 up a profitable field for the vulcanizer or shoe repair man, when 

 regular business is slack. 



Rubber Boot an'h .Shoe \'ui.c.\nizer 



The vulcanizing table consists of a series of molds on the hot 

 plate, the size of which is 32 by 17 inches. The molds are de- 

 signed to conform to the different shapes taken by the various 

 angles of a boot or shoe, permitting the repair to be made no 

 matter where the rip, tear or worn out spot may be. The vulcan- 

 izing is done on the outside, as no boot lasts or other inside con- 

 trivances arc used. It is claimed that this outfit will resole, rc- 

 heel and put patches on the edges, sides, back of the heel, or instep. 

 In addition, it will repair hot-water bottles, hospital sheets, rubber 

 gloves, tennis shoes, rubber coats, football bladders, inner tubes; 

 in other words, any sort of a rubber article. 



The illustration shows the device complete with vulcanizing 



table mounted on strong legs and the steam boiler in place. The 

 gasoline force-feed Imrner is ready to be attached to the boiler. 

 The gasoline supply tank is equipped with gage, hand pump and 

 necessary connecting hose. The boiler can be arranged to use 

 gas, or, wherever steam is available, the vulcanizer is sold without 

 the boiler. 



From 60 to 65 pounds of steam are required for vulcanizing. 

 The average job requires from IS to 20 minutes. Seven to four- 

 teen jobs can be accommodated on the table at the same time. — 

 \'ulcanizing Machine & Supply Co., Jackson, Michigan. 



SANITARY RUBBER CEMENT MIXER 



.\ time saver for mixing small quantities of rubber cement 

 is the cln li ii ,[I1\ (IriMii churn shown herewith. The motor is 



arranged for either direct or 

 alternating current. Connec- 

 tions for operating are made 

 to an ordinary electric light 

 socket. It is also supplied in 

 the following types and sizes: 

 portable, combination hand 

 and belt power; stationary, 

 combination hand and belt 

 power ; and portable hand 

 power. Capacities range 

 from 8 to 25 gallons. 



The barrel of the churn is 

 made of non-absorbent glazed 

 stoneware. The cover is an- 

 nealed glass ^-inch thick and 

 the sealing ring is of thick 

 rubber, easily removable for 

 wasliing. The frame is of varnished pine. All metal parts at- 

 tached to the barrel are finished with aluminum. The bearmgs 

 are of steel. A shaft and bracket are attached to the frame for 

 reducing the speed. — Superior Churn & Mainifacturing Co., North- 

 ville, Michigan. 



ELECTRIC TRACTOR FOR RUBBER PLANTS 



For hauling tires and cores to and from the vulcanizing room, 

 .-ukI other work of a similar nature, the industrial tractor has 

 proven indispensable. The truck shown in the illustration is 

 claimed to haul a load of 3,100 pounds each trip and makes the 

 round in four minutes. A statement has been made to the effect 



Superior Electric Chlr.n 



Electric F.\ctorv TR.\rT0R 



that siinie of these trucks have been in operation for over seven 

 years and have travelled appro.\imately 210,000 miles. 



Each of the, four wheels is carried on its own knuckle, thus 

 eliminating road shock to the steering mechanism. The rebound 

 springs which support the frame over the drive wheels protect 

 both (he equipment and the operator against jarring when the 



