158 GOODYEAR ON GUM-ELASTIC. 



heit. This machine will warm the gum as fast as it is required 

 to supply one spreading machine. 



SPREADING. 



This is performed with the machine represented by No. 4, by 

 which the gum, after being mixed and prepared, is rolled into 

 sheets, spread upon cloths, or combined with fibrous sub- 

 stances, by which means drapery, the laminated fabrics, &c., 

 are formed. 



The gum which is passed from the warming machine, No. 3, 

 is placed between the first and second rolls from the top. The 

 gum forms a sheet upon the second roll, and as it passes over, is 

 pressed into the cloth, or cotton, which is passed between the 

 third and fourth rolls. The fabric is wound upon a roll, in 

 front of the machine, and connected with it ; if the cloth is coated 

 upon both sides, or if the fabric manufactured is drapery, or sheets 

 of gum, they are rolled up in cloths, to prevent the surfaces from 

 adhering together, until they can be worked up or vulcanized. 



The average speed of this machine is such as to produce 

 twelve hundred to fifteen hundred yards per day, covered with 

 one coat of gum, and for some of the fabrics, two thousand 

 yards per day. 



These callenders, like Nos. 2 and 3, are hollow, and are heated 

 to about 200°, Fahrenheit. In this part of the manufacture there 

 is no delay, and when the supply of the gum is kept up by the 

 grinders, the goods are turned off with a rapidity to satisfy those 

 who are most impatient of delay. 



The vast difference between the power of the two machines, 

 that for crushing and grinding, and that for spreading the gum, 

 and making the fabrics, has suggested to the inventor, that ulti- 

 mately the plan might be adopted of preparing the gum at sep- 

 arate establishments, for the manufacturers of the fabrics and 

 articles, with the same advantages that are obtained by the 



