Conveyor pan

A conveyor pan, for underground face and gate conveyors, with asymmetrical side walls, comprising cast parts joined together by a plate welded onto intermediate arms which comprise an upper outwardly facing cast flange lug extending from the intermediate arm, a lower cast flange arm extending outwards, and a cast foot flange extending inwards, partly bordering a bottom run for the guidance of a scraper of a scraper chain, onto which a bottom plate is welded which closes the bottom run to below, in which at least one of the cast parts has at least one step on an inner wall of the intermediate arm, essentially at half the height between the lower flange arm and the upper flange lug for the support and welding on of a metal sheet forming an intermediate plate, beneath which the intermediate arm and the foot flange form a profile having a greater thickness than the upper intermediate arm and above which the intermediate arm borders to its side an accepting space for the acceptance of a top run having a rolled side profile welded to a conveyor base in which, the conveyor pan has an exchangeable tray with essentially T-shaped side profiles which include horizontal webs which are welded to the flange lugs of the side walls as a retaining means for the exchangeable tray.