230 



THE INDIA RUBBER WORLD 



[I^'ebruary 1, 1916. 



Continuous Process Tire Manufacture. 



THE two things tliat all of the manufacturers of motor tires the Doughty Tire Co., Providence, Rhode Island. When the 



have been working toward for the past five years have Doughty patents were issued some few months ago they were 



been, first, an ideal fabric for the carcass and, second, a described in this publication from the patent office drawings, 



continuous mechanical process in the making and curing. Now we are able to show views of the most important machines 



In the attempt- to produce the strongest and most durable faliric in operation. 



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Loom for Weaving Fabric Exact Siiail \^|| Wiiiii I'k J ii.l 

 Carcass. 



there have been evolved two distinct types, the woven fabric and 

 the cord fabric. Of the former hundreds of different weaves were 

 tried before the present standard weave was adopted. In use 

 this fabric is frictioned, cut into strips on a bias cutter and the 

 strips pasted end to end and wound into rolls ready to be ap- 

 plied to the tire core. The cord fabric is, of course, built up by 

 special cord laying machines. 



Building the Tike Carcass with Fabkic Dirixt from the 

 Friction Calender. 



While many tire making machines have been invented and 

 scores of others are in use as accessories to tire manufacture, 

 only one has made the loom and the calender a part of the 

 continuous process. That one is the Doughty process, owned by 



\i Lie fiRL Pre. s Mold with Electrically 

 Heated Expansible Cure. 



The process begins with the weaving of the fabric in bands, 

 the exact width of the tire carcass. The weave is so arranged 

 that the strip comes from the loom shaped as it will be when 

 made up into a tire. 



This strip of fabric is next passed through a calender, the 

 rolls of which are shaped to it, where it is frictioned. Directly 

 from the calender it is wound hot upon the tire core. 



The carcass next goes to the tire press mold where, with an 

 expansible electrically heated core on the inside and the usual 



Specimen of the Doughtv F.abric. 



steam heat in the platens, it is cured in IS to 20 minutes. The 

 time required for the whole process is about 30 minutes. 



So far tests of tires made show unusual mileage, while the 

 owners of the process claim that they save 50 per cent in time 

 and labor over existing processes. 



These machines are novT assembled in Providence. So far the 

 company have not attempted to manufacture tires for general 

 use, as the plan is to lease the machinery on a small royalty basis. 



