66 The Cultivation and Preparation of Coffee 



Indies. Kegarding the working of these pulpers, 

 referring to the results, these are much about 

 the same as those obtained in cylindrical type 

 of pulpers. These pulpers are made in various 

 sizes, and they are provided with 1, 2, 3, or 

 4 discs, according to the capacity desired. 

 Each disc is covered, both sides, with a copper 

 plate of the same shape, punched with blind 

 punches, and are secured to the iron discs by 

 means of copper rivets. 



In this type of pulper the pulping takes 

 place between the rubbing action of the bulbs 

 on the copper plates and the lateral pulping 

 bars fitted to the side cheeks. The same as in 

 the cylindrical type of pulper, the clearance 

 between the surface of the bar and that of the 

 copper disc can be adjusted to allow any 

 clearance which may be required, according to 

 the kind of coffee to be treated. The advantage 

 of these machines is that they require the 

 minimum amount of water for pulping, there- 

 fore they should be used in those countries 

 where a scarcity of water is felt. The hopper 

 of the machine is usually fitted with an auto- 

 matic feed regulator to ensure that each cheek 

 does the same amount of work. Having seen 

 these machines at work, I can fully recom- 

 mend them. 



