Handling Materials in Hulk 59 



chain on an inclined railway track I his type 

 is best j. >r rou^J. 'her limited 



in its application. 



cyors. In scraper conveyors, the 

 s at regular intervals scrapers of wood 

 or steel which slide the material along the 

 trough. 1 his type can handle any non-abrasive 

 material horizontally or up inclines not in excess 

 of 40. The troughs are made of wood or steel or 

 are lined with steel plates. By opening and clos- 

 ing holes in the bottom, the material may be 

 :ged at any desired point or may be can 

 on to the end It may also be fed in at any place 

 along the line. It is obvious that this type of 

 conveyor is wasteful in power and unsuited to ab- 

 rasive materials, as they are dragged along the 

 \\holc length <>t the conveyor. Sec illustration 



.Ipron Conveyors. In an apron conveyor the 

 chain carries flat plates which sometimes over- 

 lap each other like fish scales. These form a solid 

 moving platform, onto which material may be 

 hargcd and carried to the end of the line. 

 It will handle any material, abrasive or not, which 

 will not stick to the apron or run through the 

 cracks between the plates. It requires less power 

 than the scraper conveyor, since the material lies 

 at rest on the apron. It is an excellent conveyor 

 for handling heavy, lumpy, gritty material, such 

 is ore, foundry castings, etc., and is also used to 

 convey a great of materials and finished 



products. It usually discharges only at the end, 



