The present invention provides a device for cleaning a screen in a material processing apparatus wherein the screen has at least a plurality of {HEAD ~ elongate bars} defining {TAIL ~ spaces} therebetween through which material flows 
The present invention provides a device for cleaning a screen in a material processing apparatus wherein the screen has at least a plurality of { HEAD ~ elongate bars } defining { TAIL ~ spaces } therebetween through which material flows
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH