This meant the incline of the various belts and conveyors must be lowered so that the coal did not slide on the belts or move too quickly down chutes. (...) oseph Battin, a supervisor at a coal gas manufacturing plant in Philadelphia, Pennsylvania, invented the first coal breaker — two cast iron rollers (...) through which the coal was crushed before it rolled down a chute and then through an inclined cylindrical screen.
http://en.wikipedia.org/wiki/Coal_breaker

Transfer station from a longwall chain conveyor to a drift chain ...
- [ Tłumaczenie strony ]
6 May 1986 ... A transfer station from a longwall chain conveyor to a drift chain conveyor have upper and lower reaches which cross alternately.
www.freepatentsonline.com/4586753.html -

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Note added at 19 hrs (2011-05-30 15:25:32 GMT)
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Vibration Vibration coal conveyor belt installed in the recovery of coal crusher coal transfer station. The first round of the coal handling by hand when ...
www.articlesnatch.com/Article/Binq-Coal-Crusher..