Kadant Black Clawson Inc.

Thermo Black Clawson Inc.

Christopher L Demler

John J Egan, Iii

David E Chupka

Daniel Parenteau

Donald K Greier

Mark Mouannes

Peter Joseph Flynn

Patrick McEnroe

Guy Maurais

Michael Lopane

Gary Scott Williamson

A screen cylinder includes a profiled bars aligned longitudinally and coupled to at least one support ring. Each of the profiled bars includes an outer surface facing away from the support ring, a first slot surface extending from the outer surface to the attachment end, and a second slot surface opposite the first slot surface and extending from the outer surface to the attachment end of the profiled bar. The first slot surface of one profiled bar and the second slot surface of another immediately adjacent profiled bar define a slot. The profiled bars include a hardened layer integral with or disposed on at least a portion of the first slot surface of the profiled bar. The hardened layer may have a Vickers hardness greater than the hardness of the base metal.

Screen cylinder with improved slot width protection and method of removing solid contaminants from a solid suspension

A ragger system for removing solid debris from a pulper vessel of a pulping system is disclosed. The ragger system includes a ragger operable to pull a tail of solid debris from the pulper vessel. The ragger includes a puller mechanism, a puller drive, a rider roll, and a pressure device to adjust a pressure of the rider roll on the tail between the puller mechanism and the rider roll. The ragger system includes a measurement device for determining attributes of the tail, operating conditions of the pulping system or ragger, or combinations of these. The ragger system includes a control system that measures input variables with the measurement devices, determines the attributes of the tail or operating conditions from the input variables, and adjusts a withdrawal rate, pull direction, pressure, rider roll torque or speed, or combinations thereof to maintain continuity of operation of the ragger.

Ragger systems and methods for removing solid debris from pulping processes

The present invention relates to extraction bedplatesfor use in apparatusfor defiberizing paper making stock and methods for making such bedplates. Preferred methods for making such bedplatesinclude the step of cutting a disc shaped blank from a metal plate and the step of forming holeseither the metal plate or the disc shaped blank. The holespreferably are formed using a cutting stream, most preferably either a laser or a water jet. Use of a such a cutting stream to form the holes facilitates the cutting of holeshaving non-circular, and preferably tesselatory, cross sections as well as holesextending at acute angles with respect to an axisof the bedplate.

Extraction bedplate with laser or water jet cut apertures

An improvement to a mechanical refining system relates to an apparatus including three or more actuators () coupled to a stator () of the refining system, and a controller for independently operating the actuators. An improved method of refining permits adjustment of the overall width of a refining gap between refining elements mounted by the stator and a rotor as well as the trim of the refining elements relative to each other.

Self-aligning and actively compensating refiner stator plate system

The present invention relates to extraction bedplates (), (), (), (), (), (), () for use in apparatus () for defiberizing paper making stock and methods for making such bedplates. Preferred methods for making such bedplates (), (), (), (), (), (), () include the step of cutting a disc shaped blank from a metal plate and the step of forming holes (), (), (), (), (), (), (), () either the metal plate or the disc shaped blank. The holes (), (), (), (), (), (), (), () preferably are formed using a cutting stream, most preferably either a laser or a water jet. Use of a cutting stream to form the holes facilitates the cutting of holes (), (), (), (), (), (), (), () having non-circular, and preferably tesselatory, cross sections as well as holes (), (), (), (), (), (), (), () extending at acute angles with respect to an axis () of the bedplate.

A paper pulp refiner with control system employs active hydrostatic bearings for supporting the refiner rotor, at least in part, the hydrostatic bearings are defined between the refiner rotor plates () and stator plates () through openings () formed in the stator plates for the admission of active hydrostatic fluid. The control fluid flows into the refiner gap under controlled volume and pressure, employing the refining plates as active hydrostatic bearings and flows into the process fluid. Hydrostatic control fluid is used, which is non-contaminated to the process fluid. The rotors of the paper pulp refiners may also be controlled by hydrostatic bearing surfaces formed between relative rotating and non-rotating components, such surfaces having passageways also opening into the process fluid. In the event of loss of control or function, the refiner may continue to operate on the hydrostatic bearings until the control function can be restored.

Paper pulp refiner control system and method using active hydrostatic bearings

The invention pertains to equipment and methods in which the rotatable drive member of a variable speed motor, such as a switched reluctance motor, carries a rotatable pulp processing element ( ). Magnetic bearings ( ) levitatingly support both the rotatable drive member ( ) and associated rotatable pulp processing element ( ) and control axial and radial positionning thereof relative to the axis of rotation of the drive member.

Integrated paper pulp and process machinery having integrated drive and control and methods of use thereof

A rotary paper pulp refiner system and method includes a rotor having one or more refining elements mounted on a rotating shaft and complimentary non-rotating or stator elements defining with the rotating element a refining gap or gaps through which the paper stock material passes, and which the rotor is mounted for rotation on magnetic bearings that support the rotor shaft for rotation and define the axial and radial running position thereof. Optionally, a movable stator housing wall may also be controlled by a magnetic bearing.

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Lebanon, OH, United States of America

Christopher L Demler