Suction channel for perforated conveyor belt - is divided into sections by partitions, or valves, shut in rest position

摘要

The channel is connected to an exhauster and is closed, apart from one or more slot-shaped openings masked by a perforated conveyor belt. The channel passage (1) is divided into sections (1.1,1.2,1.3,) by transverse partitions (7) and/or valves (9.1,9.2) shut in the rest position, and opening under the effect of the suction. The partitions can be inclined about horizontal transverse axes, containing openings (8) above which flap valves are hinged, these resting under gravity against the opening edges. The valves can be of elastic material, and weighted, or alternatively spring-loaded into shut position.