公开(公告)号：AU1635297A

公开(公告)日：1997-09-25

申请号：AU1635297

申请日：1997-03-17

Applicant: INSTITUTE OF PAPER SCIENCE AND TECHNOLOGY INC

Inventor： ORLOFF DAVID I ,  PATTERSON TIMOTHY ,  RUDMAN ISAAK

IPC: D06B15/02 ,  D21F3/02 ,  D21F5/00 ,  F26B13/04 ,  F26B13/10 ,  F26B13/28 ,  F26B13/18

Abstract: A method and apparatus for drying a fiber web is provided by pressing the web, preferably by impulse drying and then introducing the web into a gas pressurized zone followed by reducing the pressure in the zone, the reduction preferably being effected with cooling of the fiber web. In another embodiment, the web exiting a nip formed between press rolls is wrapped an appropriate amount about the surface of the heated roll to provide a final stage of pressurization.

公开(公告)号：WO1995010366A1

公开(公告)日：1995-04-20

申请号：PCT/US1994006256

申请日：1994-06-03

Applicant: INSTITUTE OF PAPER SCIENCE AND TECHNOLOGY, INC.

Inventor： INSTITUTE OF PAPER SCIENCE AND TECHNOLOGY, INC. ,  AIDUN, Cyrus, K.

IPC: B05C05/02

CPC classification number: D21H23/36 ,  B05C3/18

Abstract: A coating applicator for coating a web or flexible substrate contains a walled application chamber where the coating liquid first comes into contact with the substrate (53). The coating liquid enters a channel of the application chamber (51) at the upstream side and wets the substrate as it flows in the same direction as the substrate. A doctor element (55) is positioned at the downstream side of the channel where the excess coating in the channel follows the contour of the boundary formed by the doctor element and leaves the channel. One of the applicator walls is designed to be a floating or moving wall or belt. The floating applicator wall and geometry of the streamlined boundaries of the coating device eliminates the formation of recirculating eddies or vortices. The elimination of vortices eliminates flow instability due to centrifugal forces and removes harmful pressure fluctuations which could result in coat-weight nonuniformities.

Abstract translation: 用于涂布网状物或柔性基材的涂布涂布器包含壁涂布室，涂覆液体首先与基材（53）接触。 涂布液在上游侧进入施加室（51）的通道，并在与基板相同的方向流动时润湿基板。 刮刀元件（55）位于通道的下游侧，其中通道中的多余涂层遵循由刮刀元件形成的边界的轮廓并离开通道。 涂抹器壁之一被设计为浮动或移动的墙壁或皮带。 浮动涂抹器壁和涂层装置的流线型边界的几何形状消除了循环涡流或涡流的形成。 消除涡流消除了由于离心力引起的流动不稳定性，并消除了可能导致涂层重量不均匀性的有害的压力波动。

公开(公告)号：US20030111194A1

公开(公告)日：2003-06-19

申请号：US10233983

申请日：2002-09-03

Applicant: Institute of Paper Science and Technology, Inc.

Inventor： Xin-Sheng Chai ,  Jun Yong Zhu

IPC: D21C007/12

CPC classification number: D21C3/228

Abstract: A system and method for rapidly determining the pulp kappa number through direct measurement of the potassium permanganate concentration in a pulp-permanganate solution using spectrophotometry. Specifically, the present invention uses strong acidification to carry out the pulp-permanganate oxidation reaction in the pulp-permanganate solution to prevent the precipitation of manganese dioxide (MnO2). Consequently, spectral interference from the precipitated MnO2 is eliminated and the oxidation reaction becomes dominant. The spectral intensity of the oxidation reaction is then analyzed to determine the pulp kappa number.

Abstract translation: 通过使用分光光度法直接测定高锰酸钾溶液中的高锰酸钾浓度来快速测定纸浆卡伯值的系统和方法。 具体地，本发明使用强酸化在纸浆高锰酸盐溶液中进行纸浆高锰酸盐氧化反应，以防止二氧化锰（MnO 2）的沉淀。 因此，消除了来自沉淀的MnO 2的光谱干扰，氧化反应成为主导的。 然后分析氧化反应的光谱强度以确定纸浆卡伯值。

公开(公告)号：US20010018959A1

公开(公告)日：2001-09-06

申请号：US09825702

申请日：2001-04-04

Applicant: Institute of Paper Science and Technology, Inc.

Inventor： Cyrus K. Aidun

IPC: D21F001/00 ,  D21F001/06

CPC classification number: D21F1/02 ,  D21F1/026 ,  D21F1/028

Abstract: Methods and apparatus to enhance paper and board forming qualities with insert tubes and/or a diffuser block in the paper forming machine headbox component which generates vorticity in the machine direction (MD) which is superimposed on the streamwise flow to generate a swirling or helical flow through the tubes of the diffuser block. Tubes of the diffuser block are designed such that the direction of the swirl or fluid rotation of the paper fiber stock may be controlled and the direction thereof is controlled in such a way to provide effective mixing, coalescence and merging of the jets of fluid emanating from the tubes into the converging section, i.e., nozzle chamber of the headbox. Also disclosed is the effective mixing of the jets generating cross-machine direction (CD) shear between the rows of jets that form at the outlet of the tubes inside the nozzle chamber of the headbox to align paper fibers in the cross-machine direction. In another alternate embodiment, the generation one or more counter-rotating vortex pairs (CVPs) may be set up inside each tube instead of a single vortex per tube. The counter-rotating vortices inside the tubes result in more effective interaction of the jets once leaving the tubes. The CVPs may be generated in four orientations in the tube block, generating controlled axial vortices promoting mixing of the jets of paper stock from the tubular elements as the jets flow into the nozzle chamber to a uniform flow field of stock at the slice opening for the rectangular jet.

Abstract translation: 在纸张成型机流浆箱部件中用插入管和/或扩散器块提高纸和纸板成型质量的方法和装置，其在机器方向（MD）上产生涡度，该机器方向（MD）叠加在流动流上以产生旋转或螺旋流 通过扩散块的管。 扩散器块的管被设计成使得可以控制纸纤维原料的旋转或流体旋转的方向，并且其方向被控制以提供有效的混合，聚结和合并从 进入会聚部分的管子，即流浆箱的喷嘴室。 还公开了在流浆箱的喷嘴室内的管出口处形成的射流排之间产生跨机器方向（CD）剪切的射流的有效混合，以在横向上对准纸纤维。 在另一替代实施例中，产生一个或多个反向旋转涡流对（CVP）可以设置在每个管内，而不是每个管的单个涡流。 管内的反旋转涡流导致离开管之后射流的更有效的相互作用。 CVP可以在管块中的四个取向中产生，当喷射流入喷嘴室时，产生受控的轴向涡流，从而促进纸料从管状元件的喷射的混合，以在切片开口处的浆料的均匀流场 矩形射流。

公开(公告)号：US20020148585A1

公开(公告)日：2002-10-17

申请号：US10122029

申请日：2002-04-12

Applicant: Institute of Paper Science and Technology, Inc.

Inventor： Cyrus K. Aidun

IPC: D21F011/02 ,  D21F001/02

CPC classification number: D21F1/02 ,  D21F1/026 ,  D21F1/028

Abstract: Methods and apparatus to enhance paper and board forming qualities with insert tubes and/or a diffuser block in the paper forming machine headbox component which generates vorticity in the machine direction (MD) which is superimposed on the streamwise flow to generate a swirling or helical flow through the tubes of the diffuser block. Tubes of the diffuser block are designed such that the direction of the swirl or fluid rotation of the paper fiber stock may be controlled and the direction thereof is controlled in such a way to provide effective mixing, coalescence and merging of the jets of fluid emanating from the tubes into the converging section, i.e., nozzle chamber of the headbox. Also disclosed is the effective mixing of the jets generating cross-machine direction (CD) shear between the rows of jets that form at the outlet of the tubes inside the nozzle chamber of the headbox to align paper fibers in the cross-machine direction. In another alternate embodiment, the generation one or more counter-rotating vortex pairs (CVPs) may be set up inside each tube instead of a single vortex per tube. The counter-rotating vortices inside the tubes result in more effective interaction of the jets once leaving the tubes. The CVPs may be generated in four orientations in the tube block, generating controlled axial vortices promoting mixing of the jets of paper stock from the tubular elements as the jets flow into the nozzle chamber to a uniform flow field of stock at the slice opening for the rectangular jet.

公开(公告)号：US20020119258A1

公开(公告)日：2002-08-29

申请号：US10131639

申请日：2002-04-24

Applicant: Institute of Paper Science and Technology, Inc.

Inventor： Sujit Banerjee ,  Earl Malcolm

IPC: D21C007/00

CPC classification number: D21C1/10 ,  D21C7/14

Abstract: System and method for diffusing chemicals rapidly and evenly into and through fibrous material, such as wood. Chemicals are introduced into the fibrous material by applying the chemicals to the fibrous material. After treating the fibrous material with the chemicals, the fibrous material is maintained under low-headspace conditions. Thermal energy or dielectric heating, such as microwave or radio frequency energy, is applied to the fibrous material. As a result, the chemicals are able to distribute evenly and quickly throughout the fibrous material.

Abstract translation: 快速均匀地将化学物质扩散到纤维材料（如木材）中的系统和方法。 通过将化学品施加到纤维材料上将化学品引入纤维材料中。 在用化学品处理纤维材料之后，纤维材料保持在低顶空条件下。 将热能或电介质加热，如微波或射频能量施加到纤维材料上。 因此，化学品能够均匀且快速地分布在整个纤维材料中。

公开(公告)号：US20020117285A1

公开(公告)日：2002-08-29

申请号：US10071481

申请日：2002-02-07

Applicant: Institute of Paper Science and Technology , Inc.

Inventor： Cyrus K. Aidun

IPC: D21F001/02 ,  D21F001/06

CPC classification number: D21F1/02 ,  D21F1/026 ,  D21F1/028

Abstract: Methods and apparatus to enhance paper and board forming qualities with insert tubes and/or a diffuser block in the paper forming machine headbox component which generates vorticity in the machine direction (MD) which is superimposed on the streamwise flow to generate a swirling or helical flow through the tubes of the diffuser block. Tubes of the diffuser block are designed such that the direction of the swirl or fluid rotation of the paper fiber stock may be controlled and the direction thereof is controlled in such a way to provide effective mixing, coalescence and merging of the jets of fluid emanating from the tubes into the converging section, i.e., nozzle chamber of the headbox. A specific flow inside the headbox distributes the fibers in an isotropic form, i.e., uniform in all directions, in the sheet substantially eliminating the MD preferential fiber orientation to produce an isotropic and uniform sheet. Also disclosed is the effective mixing of the jets generating cross-machine direction (CD) shear between the rows of jets that form at the outlet of the tubes inside the nozzle chamber of the headbox to align paper fibers in the cross-machine direction.

Abstract translation: 在纸张成型机流浆箱部件中用插入管和/或扩散器块提高纸和纸板成型质量的方法和装置，其在机器方向（MD）上产生涡度，该机器方向（MD）叠加在流动流上以产生旋转或螺旋流 通过扩散块的管。 扩散器块的管被设计成使得可以控制纸纤维原料的旋转或流体旋转的方向，并且其方向被控制以提供有效的混合，聚结和合并从 进入会聚部分的管子，即流浆箱的喷嘴室。 流浆箱内部的特定流动将纤维以片材的各向同性形式分布，即在所有方向均匀，基本上消除了MD优先纤维取向以产生各向同性均匀的片材。 还公开了在流浆箱的喷嘴室内的管出口处形成的射流排之间产生跨机器方向（CD）剪切的射流的有效混合，以在横向上对准纸纤维。

公开(公告)号：US20030051844A1

公开(公告)日：2003-03-20

申请号：US10202573

申请日：2002-07-24

Applicant: Institute of Paper Science and Technology, Inc.

Inventor： Cyrus K. Aidun

IPC: D21F011/00 ,  D21F001/02 ,  B01F005/00

CPC classification number: D21F1/02 ,  D21F1/026 ,  D21F1/028

Abstract: Methods and apparatus to enhance paper and board forming qualities with insert tubes and/or a diffuser block in the paper forming machine headbox component which generates vorticity in the machine direction (MD) which is superimposed on the streamwise flow to generate a swirling or helical flow through the tubes of the diffuser block. Tubes of the diffuser block are designed such that the direction of the swirl or fluid rotation of the paper fiber stock may be controlled and the direction thereof is controlled in such a way to provide effective mixing, coalescence and merging of the jets of fluid emanating from the tubes into the converging section, i.e., nozzle chamber of the headbox. Also disclosed is the effective mixing of the jets generating cross-machine direction (CD) shear between the rows of jets that form at the outlet of the tubes inside the nozzle chamber of the headbox to align paper fibers in the cross-machine direction. In another alternate embodiment, the generation one or more counter-rotating vortex pairs (CVPs) may be set up inside each tube instead of a single vortex per tube. The counter-rotating vortices inside the tubes result in more effective interaction of the jets once leaving the tubes. The CVPs may be generated in four orientations in the tube block, generating controlled axial vortices promoting mixing of the jets of paper stock from the tubular elements as the jets flow into the nozzle chamber to a uniform flow field of stock at the slice opening for the rectangular jet.

公开(公告)号：EP0796945A2

公开(公告)日：1997-09-24

申请号：EP97104604.0

申请日：1997-03-18

Applicant: Institute of Paper Science and Technology, Inc.

Inventor： Orloff, David I. ,  Patterson, Timothy ,  Rudman, Isaak

IPC: D21F3/02 ,  F26B13/10

CPC classification number: D21F3/0281 ,  D21F3/0272 ,  F26B13/10 ,  F26B13/28

Abstract: A method and apparatus for drying a fiber web is provided by pressing the web, preferably by impulse drying and then introducing the web into a gas pressurized zone followed by reducing the pressure in the zone, the reduction preferably being effected with cooling of the fiber web. In another embodiment, the web exiting a nip formed between press rolls is wrapped an appropriate amount about the surface of the heated roll to provide a final stage of pressurization.

Abstract translation: 一种用于干燥纤维纸幅的方法和装置通过按下网络，优选地通过脉冲干燥，然后将所述幅材成随后通过降低在该区域中的压力的​​气体加压区提供，还原优选地实现与所述纤维网的冷却 ， 在另一个实施方式离开压机之间形成的辊隙的幅材卷缠绕在绕加热的辊，以提供加压的最后阶段的表面适当的量。

公开(公告)号：EP0769586B1

公开(公告)日：2002-10-30

申请号：EP96103662.1

申请日：1996-03-08

Applicant: Institute of Paper Science and Technology, Inc.

Inventor： Aidun, Cyrus K.

IPC: D21F1/02 ,  D21F1/00

CPC classification number: D21F1/026 ,  D21F1/02 ,  D21F1/028