igo 



THE RUBBER TREE BOOK 



The teeth on one roller being 18 and on the other 20, the shred- 

 ding and tearing is less violent than in the macerator. In this, 

 as in all the mills, water flows on to the sheets of rubber from 

 pipes which discharge their flow of water from overhead on the 

 rubber passing through the rollers. 



This mill, fitted with adjustable screws, presses the rough 

 sheets thinner, making them more compact each time they pass 





FIG. 50. A Claw-clutch-driven Mill (H. Berry & Co., Leeds). 



through. After they have been run through two or three 

 times as single sheets they are doubled over on themselves so as 

 to fill up any holes and are run through in this fashion other 

 two times. 



The mill on which the crepe is finished has usually smooth 

 rollers, or rollers with a slight grain or shallow groove on them. 

 There is only one tooth of difference on the gearing of the two 

 rollers. The crepe should be passed through this mill twice or 

 thrice, each time adjusting the screws so as to bring the rollers 



