Importance

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Abstract

A classifying device comprising: a bin having an open top face; a flat screen extending along a plane and configured for extending over and fully covering the open top face of the bin, the screen having a netting configured to enable passage of material smaller than a desired size therethrough into the bin; and two flanges disposed at two respective opposite sides of a perimeter of the screen. The device is configured for being placed in a water stream with a water level just above the screen and the flanges disposed substantially along a direction of a water flow of the stream, such that the flanges decrease escape of the water through the sides at which the flanges are disposed, thereby increasing a speed of the water flow over the screen in the direction of the water flow of the stream.

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First Claim