()2 Material* <ind Their Handling 



arranged to discharge at the end or, by trippers, 

 to discharge at any point along the run. These 

 tripping devices may be permanently fixed at one 

 place, may be moved from one place to another. 

 as from the top of one bin to the next, or travel 

 back and forth for the entire length of the belt. 

 illustrations of a troughcd belt conveyor face 

 this page. 



Indus trial (Jar*. For the intermittent handling 

 of bulk material, industrial cars on narrow gauge 

 tracks arc most commonly used. This is usually 

 the means of conveyance in yards where rough ma- 

 terial is picked up in bulk and brought into the 

 building. Cars for this purpose are preferably 

 of the dumping type, either tilted or with dump- 

 ing bottoms, and are handled singly or in trains. 

 Where the work is continuous and the quantities 

 handled are large, special arrangements may be 

 made to move and to dump the material automat- 

 ically. A good example of this is the skips for 

 hoisting coal, ore, and limestone into a blast fur- 

 nace. The handling of materials intermittently 

 is so varied in its requirements that no specific 

 description can be given. 



Section II 

 Handling Materials in Containers 



When Containers Are Necessary. In the last 

 chapter we considered the handling of material in 

 bulk. Most of the methods described are used 



