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THE INDIA RUBBER WORLD 



March 1, 1921 



The illustration shows the device complete with vulcanizing 

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

 gasoline forcc-fccd burner 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 



Third, is the cold cure cementing process. In this a cemented 

 surface is lightly brushed over with a solution of chloride of 

 sulphur and bisulphide of carbon. This requires experience and 

 is not altogether pleasant because of the offensive smell. 



Fourth, comes the vulcanizing or vulcanizable cements. These 

 consist of compounded rubber dissolved in naphtha, the rubber 



The M. & E. Repair Vui.canizer 



The Brackett Vui.canizer 



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

 the boiler. 



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

 The average job requires from 15 to 20 minutes. Seven to four- 

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

 THE BRACKETT VULCANIZER 



The Brackett machine is designed with a view toward sim- 

 plicity in all its parts, as in some instances it will be operated 

 by workmen who have not had a great deal of experience in 

 this line of work. 



The base of tlie machme is cast in block, of high-grade iron, 

 with capacious steam chambers. Ample steam connections are 

 provided and conveniently located, as this outfit is made to con- 

 nect to any steam vulcanizing plant, thus saving the cost of an 

 extra boiler. However, steam heaters can be furnished. 



With this method, of construction a direct cure on the spot 

 to be repaired is made. No outside cures whatever are used. 

 The means of securing the proper pressure is unique in its 

 simplicity, using any granular substance, preferably rye, for the 

 inside pressure and direct adjustable clamps for the outside 

 pressure. This allows the work to be held rigidly in the proper 

 position to obtain a first class job of vulcanizing. 



Four toe clips of special design are furnished with the outfit 

 which handles all sizes of work. Installation is made by plac- 

 ing the machine on a bench and connecting to the steam plant 

 with a steam hose. 



The "Baby" Brackett vulcanizcr does the same work as the 

 larger type but requires more time. The molds are preheated 

 and the vulcanizing is done on a steam or electricity heated tube- 

 plate. 



CEMENTS FOR REPAIR WORK 



Cements for footwear repair are of various sorts. 



First is the well-known rubber cement which leather shoe cob- 

 blers use. This is made of rubber dissolved in naphtha and may 

 or may not contain a little resin to make it more adhesive. It is 

 used in part for its adhesive qualities, but also because it renders 

 goods waterproof. The cobbler always depends upon stitching 

 or pegging to hold a sole in place, and not upon this cement. 



Second, is the self-vulcanizing cement. This is of compounded 

 rubber containing ingredients that effect a cure without the ap- 

 plication of heat. All of the tire accessory men carry it and for 

 surface work it is excellent. 



compound containing from 5 to 8 per cent of sulphur. Cements 

 of this sort vulcanize when heat is applied and become a part of 

 the rubber to which they are attached. 



PATENTED MACHINES FOR RUBBER FOOTWEAR REPAIR 



THE UNITED STATES 



American patents of importance on rubber footwear repairing 

 apparatus include the following: 



No. 1,206,799. Filed March 28, 1916, by Henry E. Bast, Law- 

 ler, Iowa. This is an outer cure, quick-acting vulcanizing device 

 with an adjustably rotating lasting jack, which carries a movably 

 adjustable former block sliding on and rotably adjustable on a 



The Brackett Vulcanizer in Use 



longitudinally-slottcd arm rotably and adjustably mounted on 

 the jack, and a slotted angle plate slidably and rotably adjustable 

 in the slot of the arm. When the former block is pressed 

 against the rubber boot or shoe to be repaired, gasoline is put 

 into a cup-shaped recess in the upper side of the block and 



