device for sorting of shrimp and prawn fisheries.

摘要

Crab sorting screen for prawn fishing, comprising a rotary cylindrical drum formed from a round bar (3) formed into a spiral and with collecting trays (6) disposed between the spiral windings, which are attached by their top edges (10) to opposite spiral parts of the round bar (3), the trays (6) being arranged in a continuous row, with their open side facing the inside of the drum; the trays have an increasing depth in the peripheral direction of the drum and are connected to each other so that each collecting tray is attached by the shallowest end (11) part thereof to the deepest end part (12) of the tray preceding it in the direction of rotation (D) of the drum and to the top edges thereof, so that at that end a sorting aperture (14) is formed.