Patent Number: 6,193,073

Title: Paper stock screening apparatus and method

Abstract: Pressure screening apparatus for screening a suspension of paper fiber stock employs a rotor in which a single impulse or foil member is carried or positioned to move along a discrete portion of the screen surface. This arrangement improves efficiency of operation of the pressure screen by reducing the rotational effect of the rotor on the stock suspension being screened and by providing a less disturbed screening region through which the single foil operates. Embodiments are shown in which multiple single impulse elements sweep over discrete portions of a screen and in which a single foil is combined, in screening apparatus, with multiple foils in accordance with the increase in consistency of the stock as it passes through the screen.

Inventors: Chupka; David E. (Middletown, OH), Seifert; Peter (Middletown, OH), Vitori; Christopher M. (Mason, OH)

Assignee: Thermo Black Clawson Inc.

International Classification: B01D 29/31 (20060101); B01D 29/35 (20060101); B07B 001/50 (); B07B 001/28 (); B07B 001/04 (); B07B 001/20 ()

Expiration Date: 02/27/2018