A belt training device for a conveyor. The conveyor includes an endless belt which is mounted for travel on a drive roll and an idler roll and a trainer wheel is mounted on a pivotable bracket beneath the return run of the belt and adjacent the drive roll. The wheel is pivoted upwardly into engagement...http://www.google.fr/patents/US4629062?utm_source=gb-gplus-shareBrevet US4629062 - Belt trainer apparatus for a conveyor
