| 摘要 |
<p>Pressure screening apparatus for screening a suspension of paper fiber stock employs a rotor (14, 15, 16) in which a single impulse or foil member (12) is carried or positioned to move along a discrete portion of the screen surface (10). This arrangement improves efficiency of operation of the pressure screen by reducing the rotational effect of the rotor (14, 15, 16) on the stock suspension being screened and by providing a less disturbed screening region through which the single foil (12) operates. Embodiments are shown in which a single foil (12) is combined, in screening apparatus, with multiple foils in accordance with the increase in consistency of the stock as it passes through the screen (10).</p> |
