A curved conveyor assembly includes a frame that defines a curved conveyance path. A conveyor belt is positioned on the frame system for travel along the curved conveyance path. At least one hold down guide is mounted to the frame and manually movable between an operating position and an access position. In the operating position a retaining lip of the hold down guide extends into the curved conveyance path proximate an edge of the conveyor belt for limiting upward movement of the edge of the conveyor belt. In the access position the retaining lip is moved away from the edge of the conveyor belt.