A bar screen for wood chips or the like, including at least two interacting screen elements (2, 7, 3, 8) having first parts connected to driving means (4) which impart preferably counter-directed relative movements to the screen elements, and having second parts to which said movements are transmitted, such that of the chips fed out onto the screen elements only smaller-sized chips will pass through the screen elements. The second parts of the screen elements are connected to pendulum elements (16, 17) and the screen elements form means for the transmission of motion between the driving means and the pendulum elements.
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