Patent ID: 7650985
Filing Date: 2010-01-26
Classification: B65G

Abstract:
1. A closure system for a trough, comprising: a first closure member and a second closure member, the first closure member being movable between a closed position, where it closes against the perimeter of a first opening in the bottom of a trough and an open position where it retracts to a position away from contact with the perimeter of the first opening, the second closure member being movable between a closed position where it closes against the perimeter of a second opening in an opposite side of the bottom of the trough and an open position where it retracts to a position away from contact with the perimeter of the second opening; first and second controllers operable to move the first closure member and second closure member respectively between the open and closed positions; and a first front upper detent and a second front upper detent which respectively provide stops against which the upper edges of respective closure members abut in the closed position.