WOOLLEN MANUFACTURE 



1177 



the cloth is progressively drawn from the heap, between the tension-rollers, which 

 are confined by a pall and ratchet, on to the periphery of the drum, by causing the 



21 4c 



HL 



1 



I 



-a- 



drum to revolve upon its axis, until the whole piece of cloth is tightly wound upon the 

 drum ; it is then bound round with canvas or other wrappers, to keep it secure. 



2144 



2145 



If the tank has not been previously charged with clean and pure water, it is now 

 filled to the brim, as shown at fig. 2144, and opening the stopcock of the pipe/, which 

 leads from a boiler, the steam is allowed 

 to blow through the pipe, and discharge 

 itself at the lower end, by which means 

 the temperature of the water is raised 

 in the tank to about 170 Fahr. Before 

 the temperature of the water has got 

 up, the drum is set in slow rotatory 

 motion, in order that the cloth may 

 be uniformly heated throughout; the 

 drum making about one rotation per 

 minute. The cloth, by immersion in 

 the hot water, and passing through the 

 cold air, in succession, for the space of 

 about 8 hours, gets a smooth soft face, 

 the texture not being rendered harsh, 

 or otherwise injured, as is frequently 

 the case by roll-boiling. 



Uniform rotatory motion to the 

 drum is shown in Jig. 2143, in which 

 an endless screw or worm is placed 

 horizontally, and driven by a steam-engine or any other first mover employed in the 

 factory. This endless screw takes into the teeth of, and drives, the vertical wheel //, 



