Conveyors: power-driven – Conveyor arrangement for selecting among plural sources or... – By passive material-diverting means placed across the flow path
Patent
1992-12-28
1994-10-04
Dayoan, D. Glenn
Conveyors: power-driven
Conveyor arrangement for selecting among plural sources or...
By passive material-diverting means placed across the flow path
209657, B65G 4746
Patent
active
053518020
ABSTRACT:
A system for detecting and removing metal objects from a continuously moving conveyor belt. The system includes mechanisms for lowering a scraper blade and for raising an assembly of horizontally disposed idlers mounted on a movable platform, which are activated simultaneously upon the approach of a metal object traveling on the belt. The idlers, when raised, cause a section of the belt, which is otherwise trough-like in shape, to flatten. The flattened section of the belt and the blade, in its lowered position, are disposed in close proximity to each other. The metal object and overburden moving with it on the flattened section of the belt are forced against the scraper blade. Set at an acute angle to the belt centerline, the blade deflects the metal object and overburden contaminated by it laterally, causing them to slide first onto an unsupported portion of the belt and then gently off of the belt itself. Once the metal object has been removed, the blade is raised and the platform is lowered, moving the idlers mounted on it out of contact with the belt. When not in use, these idlers are situated beneath an array of paired, downwardly sloping idlers. Even though a metal object is detected in a time interval between the detection and removal of another metal object traveling upstream of it on the belt, controls are provided to insure the removal of both metal objects.
REFERENCES:
patent: 2537005 (1951-01-01), Brown et al.
patent: 3590983 (1971-07-01), Oury
patent: 4213525 (1980-07-01), Scheppele
patent: 4480753 (1984-11-01), Thomas et al.
patent: 4930625 (1990-06-01), Wilson
Dayoan D. Glenn
Leon Harry I.
Steadman Vivian L.
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