(57) A sealing means at the lower end of a mechanical filter for removing particles carried
by a stream of water in a channel (10). The filter comprises a screen consisting of
respectively fixed (12) and movable (13) lamellar bars that form an inclined plane
down into the water stream. The edges of the bars facing the water flow direction
are stair-shaped. The movable lamellar bars (13) are interconnected in parallel to
form at least one bar screen, which is operated by means of a driving mechanism placed
at the upper end of the removing device. It produces a closed circuit motion in the
plane of the bars, with a motion component in an upward direction that exceeds the
stair height of the bars. Each respective movable bar (13) is at its lower end equipped
with a flexibly connected fingertip (14), which is pivoting in a vertical plane and
displaceable, with its outermost end (16) in a sliding bearing, forward and backward
along the channel bottom (10), during the motion of the screen.
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