公开(公告)号：US4919759A

公开(公告)日：1990-04-24

申请号：US147457

申请日：1988-01-25

申请人： Antti Ilmarinen ,  Veijo Miihkinen ,  Jorma Laapotti

发明人： Antti Ilmarinen ,  Veijo Miihkinen ,  Jorma Laapotti

IPC分类号： D21F2/00 ,  D21F3/04

CPC分类号： D21F2/00 ,  D21F3/04

摘要： Control of detachment of a web from a roll, such as a paper web from a press roll in a paper machine, in particular a so-called closed press section provided with a smooth-faced press roll. The temperature of the surface of the smooth-faced press roll is adjusted, so that adhesion between the roll surface and the paper web to be detached is influenced or affected. Thereby, the detaching angle and/or the detaching tension of the paper web, is set within an optimal range. Temperature profile of the smooth-faced press roll in the axial direction thereof, can also be adjusted with a view to controlling the detaching of the web.

公开(公告)号：US5888354A

公开(公告)日：1999-03-30

申请号：US825693

申请日：1997-04-02

申请人： Jorma Laapotti

发明人： Jorma Laapotti

IPC分类号： D21F3/02 ,  D21F3/04 ,  D21G9/00

CPC分类号： D21F3/045 ,  D21F3/04 ,  D21G9/0063

摘要： An arrangement and method for transferring a paper web in high-speed paper machines having a press section arranged between a web former and a dryer section. In the press section, there is one or more press nip zones dewatering the web, at least the last one of which is an extended nip through which at least two press fabrics that receive water are passed. The web is passed between the press fabrics through the last extended-nip zone so that the draining of water out of the web takes place through both faces of the web. After the last extended-nip zone, the web follows one of the fabrics passing through the last extended-nip zone by the effect of a difference in pressure avoiding rewetting of the web. The fabric carrying the web is passed through a gently loaded transfer nip zone in which the web is transferred onto a transfer surface more adhesive than the face of the fabric. The web is transferred on this transfer surface as a closed draw onto the drying wire or equivalent in the dryer section following after the press section.

摘要翻译： 一种用于在高速造纸机中转印纸幅的布置和方法，所述高速造纸机具有布置在幅材成形器和干燥部之间的压榨部。 在压榨部分中，存在一个或多个压榨区域对纸幅进行脱水，至少最后一个压榨区域是延伸的辊隙，至少两个接收水的压榨织物通过该间隙通过。 纸幅通过最后一个延伸夹持区域在压榨织物之间通过，使得从纸幅的两个表面排出水从纸幅中排出。 在最后一个延伸压合区域之后，纸幅通过压力差而影响通过最后一个延伸压合区域的织物之一，避免了纸幅的再润湿。 承载网的织物通过轻轻地装载的转印夹持区，其中幅材被转印到比织物的表面更粘的转印表面上。 纸幅在该转印表面上作为封闭的拉丝转印到烘干线上，或者在压榨部分之后的干燥器部分中等同。

公开(公告)号：US5865955A

公开(公告)日：1999-02-02

申请号：US726195

申请日：1996-10-04

申请人： Heikki Ilvespaa ,  Juha Kaihovirta ,  Antti Kuhasalo ,  Jorma Laapotti

发明人： Heikki Ilvespaa ,  Juha Kaihovirta ,  Antti Kuhasalo ,  Jorma Laapotti

IPC分类号： D21F3/04 ,  D21F5/00 ,  D21F5/18 ,  D21F9/02 ,  D21G9/00 ,  D21F11/00

CPC分类号： D21G9/0063 ,  D21F3/045 ,  D21F5/00 ,  D21F5/18 ,  D21F9/02

摘要： A method and device for enhancing the run of a web in a paper machine in which water is removed from the web by pressing the web in at least one press nip and after pressing, the web is dried in at least one dryer group applying impingement drying. The web is guided along a substantially linear path or by using a large curve radius in the dryer group applying impingement drying. In the drying stage, after the impingement drying, the web is dried in at least one dryer group having normal single-wire draw. The web is passed from the pressing stage to the drying stage as a closed draw and more particularly, from the pressing stage to the area with single-wire draw in the drying stage so that the web is constantly supported against at least one support face.

摘要翻译： 一种用于增强造纸机中的纸幅运行的方法和装置，其中通过在至少一个压榨压区中压榨纸幅而从纸幅中除去水分，并且在压榨之后，纸幅在至少一个干燥器组中干燥，施加冲击干燥 。 纸幅沿着基本上线性的路径引导，或者通过在干燥器组中使用大的曲线半径进行冲击干燥。 在干燥阶段，在冲击干燥之后，在至少一个具有正常单丝拉丝的烘干机组中干燥纸幅。 幅材从压制阶段到干燥阶段作为封闭的抽出通道，更具体地，从压榨阶段到干燥阶段中单丝牵引的区域，使得幅材始终支撑在至少一个支撑面上。

公开(公告)号：US5611892A

公开(公告)日：1997-03-18

申请号：US319164

申请日：1994-10-06

申请人： Mikko Karvinen ,  Reima Kerttula ,  Jorma Laapotti ,  Juhani Pajula

发明人： Mikko Karvinen ,  Reima Kerttula ,  Jorma Laapotti ,  Juhani Pajula

IPC分类号： D21F3/04 ,  D21F7/00

CPC分类号： D21F3/04 ,  D21F7/001

摘要： A closed press section in a paper machine including a compact combination of press rolls, some of which define press nips with each other between which the web has a closed draw supported by the face of a fabric. The press section has a center roll in connection with which at least one press nip is formed. A closed loop of a transfer band is passed around the center roll. The web is transferred on an outer face of the transfer band after the last press nip in the compact combination of rolls as a closed and constantly supported draw onto a drying wire in a drying section following after the press section. The transfer band loop is preferably made of a fabric that substantially does not receive water and does not rewet the web. The web-adhesion properties of the outer face of the transfer band are chosen so that, after the last nip, the web follows the transfer band, and so that the web can be transferred as a fully closed draw onto the drying wire. In connection with the loop of the transfer band, means for conditioning/cleaning the band and/or safety devices are provided, by whose means an adequate operation of the transfer band is maintained.

摘要翻译： 一种造纸机中的封闭压榨部，包括压榨辊的紧凑组合，其中一些压榨辊彼此限定压榨辊，纤维网之间具有由织物的表面支撑的封闭的牵伸。 压榨部具有与其形成至少一个压榨压区的中心辊。 传送带的闭环绕中心辊。 在紧密组合的辊之间的最后一个压榨辊隙之后，将纸幅作为封闭且持续支撑的牵引力转印到转印带的外表面上，在牵引部之后的干燥部分中的干燥丝线上。 转移带环优选由基本上不接收水并且不再润湿网的织物制成。 选择转移带的外表面的网粘附性能，使得在最后压区之后，幅材跟随转印带，并且使得幅材可以作为完全封闭的拉丝转印到干燥丝上。 结合传送带的环路，提供用于调节/清洁带和/或安全装置的装置，通过它们的手段保持传送带的适当的操作。

公开(公告)号：US4673462A

公开(公告)日：1987-06-16

申请号：US702627

申请日：1985-04-02

申请人： Jorma Laapotti

发明人： Jorma Laapotti

IPC分类号： D21F3/04 ,  D21F9/00 ,  D21F9/02

CPC分类号： D21F3/04

摘要： A closed press section of a paper machine in which a paper web leaving the wire section of the paper machine is passed, supported by a first upper fabric, through a first double-felted press nip formed by two hollow-faced rolls. The lower fabric in the first double-felted press nip is a second fabric which carries the web forwardly after the first press nip. The press section further includes a smooth-faced central roll against which at least two single-felt nips are formed, the press fabric in the first one of the single-felt nips being constituted by the second fabric. The web is detached from the second fabric and adheres to the face of the smooth-faced central roll and moves along therewith into the next single-felt nip. The press section is devoid of press rolls of the suction type with the first double-felted press nip being formed between two solid-mantle hollow-faced rolls. The run of the lower fabric and web carried thereby is turned downwardly prior to the first single-felt press nip guided by a sector of a roll having a magnitude in the range of about 30.degree. to 160.degree.. The web is passed through the first double-felted press nip and the at least two single-felt nips so that the face of the web which did not contact the forming wire contacts the smooth face of the central roll of the press in the second and third press nips.

摘要翻译： 造纸机的封闭压榨部分，其中离开造纸机的丝网部分的纸幅通过由第二上部织物支撑的第二双层压榨压区由两个中空面辊形成。 第一双层压榨压区中的下部织物是在第一压榨压区之后向前承载纸幅的第二织物。 压榨部还包括平滑的中心辊，至少两个单毛毡形成在该中心辊上，第一单面胶布中的压榨织物由第二织物构成。 纸幅与第二织物分离并粘附到光滑面中央辊的表面并随之移动到下一个单毡辊隙中。 压榨部没有吸入型压榨辊，第一双层压榨压区形成在两个固体地幔中空辊之间。 在由大约在30°至160°范围内的辊的扇形区引导的第一单毛毡压榨辊之前，由此承载的下织物和织物的运行向下转动。 纸幅通过第一双层压榨压区和至少两个单毛毡芯，使得不接触成形线的幅材的表面在第二双层压区中接触压机的中心辊的光滑表面， 第三次压榨

公开(公告)号：US06368466B1

公开(公告)日：2002-04-09

申请号：US08559496

申请日：1995-11-15

申请人： Jorma Laapotti

发明人： Jorma Laapotti

IPC分类号： D21F304

CPC分类号： D21F3/04 ,  D21F3/045

摘要： A press section of a paper making machine for dewatering a paper web (W) formed in a preceding forming section in which dewatering felts (11, 28) are applied to both surfaces of the paper web (W) as the paper web (W) travels in a closed draw from the forming section through a first extended nip press (NP1), thereby drawing a substantial amount of water simultaneously and symmetrically from both surfaces of the paper web (W). The upper felt (11) transports the paper web (W) from the first extended nip (NP1) to a smooth surfaced center roll (30) where the paper web (W) passes through at least one roll nip (N1, N2) or extended nip (NP2′, NP3′). The center roll (30) is positioned at an elevation higher than the first extended nip (NP1) thereby reducing the length of the press section. In a second roll nip (N2), a press fabric (33) is substituted for the upper felt (11) to efficiently remove additional water. Additional extended or roll nips (NP2, N3, N0, NE) may be interposed between the center roll (30) and the succeeding drying section, between the forming section and the first extended nip (NP1), or between the first extended nip (NP1) and the center roll (30).

摘要翻译： 一种造纸机的压榨部，用于对形成在纸幅（W）的纸幅（W）的两面的脱水毡（11,28）上形成的纸幅（W）进行脱水， 通过第一延伸压合压机（NP1）从成形部分以封闭的方式行进，从而从纸幅（W）的两个表面同时和对称地抽取大量的水。 上部毛毯（11）将纸幅（W）从第一延伸压区（NP1）传送到光滑的表面中心辊（30），其中纸幅（W）穿过至少一个辊压区（N1，N2）或 延长压区（NP2'，NP3'）。 中心辊（30）位于比第一延伸压区（NP1）高的高度处，从而减小压区的长度。 在第二辊压区（N2）中，用织物（33）代替上毡（11）以有效地除去附加的水。 在中心辊（30）和后面的干燥部分之间，在成形部分和第一延伸压区（NP1）之间或第一延伸压区（NP1）之间可以插入另外的延伸辊或卷辊（NP2，N3，N0，NE） NP1）和中心辊（30）。

公开(公告)号：US5876565A

公开(公告)日：1999-03-02

申请号：US870790

申请日：1997-06-06

申请人： Jorma Laapotti

发明人： Jorma Laapotti

IPC分类号： D21F3/02 ,  D21F3/04

CPC分类号： D21F3/045 ,  D21F3/04

摘要： A press section in a paper machine through which a paper web has a closed and supported draw and a method and arrangement for compensating for elongation of the web in an equalizing press nip in the press section. The press section has at least two successive separate nips and dewatering of the paper web is carried out at least in the first one of these nips, preferably between two press fabrics that receive water. The last press nip in a running direction of the web is the equalizing press nip which may be separate from the preceding nip and in which no substantial dewatering is performed. The web may be passed through the equalizing press nip from the preceding dewatering press nip on a transfer belt substantially non-water-receiving. After the equalizing nip, the elongation of the paper web in the machine direction, which elongation takes place in the equalizing nip, is compensated for by a difference in speed of the transfer belt.

摘要翻译： 造纸机中的压榨部，其中纸幅具有闭合和支撑的牵引力，以及用于在压榨部中的均匀的压榨辊隙中补偿幅材的伸长的方法和装置。 压榨部分具有至少两个连续的分开的压区，并且至少在这些压区的第一个中优选在两个接收水的压榨织物之间进行纸幅的脱水。 在幅材的运行方向上的最后的压榨压区是均匀的压榨压区，其可以与先前的辊隙分离，并且其中不进行实质的脱水。 纸幅可以通过基本上非水接收的转印带上的先前脱水压榨辊隙的均匀压榨压区。 在均匀压区之后，纸幅在机器方向上的伸长在均匀辊隙中发生的伸长率通过转印带的速度差来补偿。

公开(公告)号：US5868904A

公开(公告)日：1999-02-09

申请号：US851738

申请日：1997-05-06

申请人： Jorma Laapotti

发明人： Jorma Laapotti

IPC分类号： D21F3/02 ,  D21F3/04

CPC分类号： D21F3/045 ,  D21F3/04

摘要： A press section of a paper making machine for dewatering a paper web (W) formed in a preceding forming section in which dewatering felts (11, 28) are applied to both surfaces of the paper web (W) as the paper web (W) travels in a closed draw from the forming section through a first extended nip press (NP.sub.1), thereby drawing a substantial amount of water simultaneously and symmetrically from both surfaces of the paper web (W). The upper felt (11) transports the paper web (W) from the first extended nip (NP.sub.1) to a smooth surfaced center roll (30) where the paper web (W) passes through at least one roll nip (N.sub.1, N.sub.2) or extended nip (NP.sub.2 ', NP.sub.3 '). The center roll (30) is positioned at an elevation higher than the first extended nip (NP.sub.1) thereby reducing the length of the press section. In a second roll nip (N.sub.2), a press fabric (33) is substituted for the upper felt (11) to efficiently remove additional water. Additional extended or roll nips (NP.sub.2, N.sub.3, N.sub.0, N.sub.E) may be interposed between the center roll (30) and the succeeding drying section, between the forming section and the first extended nip (NP.sub.1), or between the first extended nip (NP.sub.1) and the center roll (30).

摘要翻译： 一种造纸机的压榨部，用于对形成在纸幅（W）的纸幅（W）的两面的脱水毡（11,28）上形成的纸幅（W）进行脱水， 通过第一延伸压合压机（NP1）从成形部分以封闭的方式行进，从而从纸幅（W）的两个表面同时和对称地抽取大量的水。 上部毛毯（11）将纸幅（W）从第一延伸压区（NP1）传送到光滑的表面中心辊（30），其中纸幅（W）穿过至少一个辊压区（N1，N2）或 延长压区（NP2'，NP3'）。 中心辊（30）位于比第一延伸压区（NP1）高的高度处，从而减小压区的长度。 在第二辊压区（N2）中，用织物（33）代替上毡（11）以有效地除去附加的水。 在中心辊（30）和后面的干燥部分之间，在成形部分和第一延伸压区（NP1）之间或第一延伸压区（NP1）之间可以插入另外的延伸辊或卷辊（NP2，N3，N0，NE） NP1）和中心辊（30）。

公开(公告)号：US5833810A

公开(公告)日：1998-11-10

申请号：US332861

申请日：1994-11-01

申请人： Jorma Laapotti

发明人： Jorma Laapotti

IPC分类号： D21F3/02 ,  D21F3/04

CPC分类号： D21F3/045 ,  D21F3/04

摘要： A press section of a paper making machine for dewatering a paper web (W) formed in a preceding forming section in which dewatering felts (11, 28) are applied to both surfaces of the paper web (W) as the paper web (W) travels in a closed draw from the forming section through a first extended nip press (NP.sub.1), thereby drawing a substantial amount of water simultaneously and symmetrically from both surfaces of the paper web (W). The upper felt (11) transports the paper web (W) from the first extended nip (NP.sub.1) to a smooth surfaced center roll (30) where the paper web (W) passes through at least one roll nip (N.sub.1, N.sub.2). The center roll (30) is positioned at an elevation higher than the first extended nip (NP.sub.1) thereby reducing the length of the press section. In a second roll nip (N.sub.2), which may alternatively be an extended nip (NP.sub.3), a press fabric (33) is substituted for the upper felt (11) to efficiently remove additional water. Additional extended or roll nips (NP.sub.2, N.sub.3, N.sub.0) may be interposed between the center roll (30) and the succeeding drying section or between the forming section and the first extended nip (NP.sub.1).

摘要翻译： 一种造纸机的压榨部，用于对形成在纸幅（W）的纸幅（W）的两面的脱水毡（11,28）上形成的纸幅（W）进行脱水， 通过第一延伸压合压机（NP1）从成形部分以封闭的方式行进，从而从纸幅（W）的两个表面同时和对称地抽取大量的水。 上毛毡（11）将纸幅（W）从第一延伸压区（NP1）输送到纸幅（W）通过至少一个辊压区（N1，N2）的光滑的表面中心辊（30）。 中心辊（30）位于比第一延伸压区（NP1）高的高度处，从而减小压区的长度。 在第二辊隙（N2）中，其可替代地为延伸压区（NP3），用织物（33）代替上毡（11）以有效地除去附加的水。 在中心辊（30）和后一个干燥部分之间或成形部分和第一延伸辊隙（NP1）之间可以插入另外的延伸辊或轧辊辊隙（NP2，N3，N0）。

公开(公告)号：US5810974A

公开(公告)日：1998-09-22

申请号：US732075

申请日：1996-10-16

申请人： Jorma Laapotti

发明人： Jorma Laapotti

IPC分类号： D21F3/02 ,  D21F3/04 ,  D21G1/02

CPC分类号： D21F3/0218 ,  D21F3/0281 ,  D21F3/04 ,  D21F3/045 ,  D21G1/0266

摘要： A press section in a paper machine including a compact combination of rolls which form a number of press nips with one another in which water is removed from a paper web. The paper web has a closed draw supported by a press fabric or by a roll face at least between the nips. The press section includes a center roll in connection with which at least two press nips are formed. The last press nip placed in connection with the center roll is an extended nip. The center roll is a roll provided with a circulation system for a heating medium and a heatable outer mantle. An outer face of the mantle of the center roll is heated by means of the circulation of the heating medium to such a temperature level that the dewatering of the paper web in the press nips arranged in connection with the center roll, in particular in the extended nip, is intensified substantially. The invention can also be accomplished in an environment in which there are two or more separate press nips, of which press nips, at least the last press nip is an extended nip.

摘要翻译： 一种造纸机中的压榨部，其包括彼此形成多个压榨辊的辊的紧密组合，其中水从纸幅移除。 纸幅具有由压榨织物支撑的封闭绘图或至少在压区之间的辊面。 压榨部包括与其形成至少两个压榨辊的连接的中心辊。 与中心辊连接的最后一个压榨压区是一个延长的压区。 中心辊是设置有用于加热介质和可加热外罩的循环系统的辊。 通过加热介质的循环将中心辊的外罩的外表面加热到使得与卷筒中心辊相连的压榨辊隙中的纸幅的脱水特别是在延伸的 辊隙大大增强。 本发明还可以在其中存在两个或更多个单独的压榨压区的环境中实现，其中压榨辊隙，至少最后的压榨压区是延伸压区。