JP2003516484A - Apparatus and method for squeezing paper web - Google Patents

Abstract

(57) Abstract: A press apparatus having an expansion nip for squeezing a continuous paper or cardboard paper web comprises a press shoe, a backing member, a support, and a plurality of loadings having a longitudinal major axis.・ Including cylinder. The press shoe can be moved between various positions. In order to be displaced between the various stop positions in the machine direction and to be fixed in these positions, a stop member is arranged downstream of the press shoe. At least some of the loading cylinders or supports include members that are eccentrically disposed with respect to one or several of the spindles, and that these members can be brought to various eccentric positions with respect to the spindle. . The eccentric and stop positions control the position of the press shoe during squeezing, thereby controlling the pressure curve.

Description

Detailed Description of the Invention

FIELD OF THE INVENTION The present invention relates to a pressing device having an expanding nip for squeezing a paper web of running paper or cardboard. The invention further relates to a procedure for controlling the machine direction pressure curve by means of such a press nip. More specifically, the present invention provides a support for supporting a press shoe adjacent a counter roll or another backing member such that the press shoe and the backing member form an expansion nip therebetween. A shoe press, including a body, and further including a hydraulic or pneumatic device for pressing the press shoe against a backing member to exert pressure on a paper web passing through the nip. Regarding

The pressing device and procedure according to the invention is particularly suitable for wet-pressing wet paper or cardboard paper webs, as well as for calendering or other finishing of dry paper or cardboard. Can be used to advantage. The squeezing device and procedure according to the invention may also be intended to be used with fiber paper webs other than paper and cardboard.

BACKGROUND OF THE INVENTION [0003] For a long time, shoe press devices, ie presses with extended nips, have the main purpose of increasing the dryness of paper webs, when producing various grades of paper and cardboard. It has been employed not only for wet pressing in, but also for calendering and other finishing to improve the surface properties or other physical properties of paper webs.

As a result of these longer nips, the shoe press maintains a higher degree of dryness at the same nip pressure or a gentler degree of dryness to the sheet when squeezed at a lower pressure. It offers many advantages over traditional roll presses, such as

It is often desirable to be able to move the pressure shoe back and forth in the machine direction in order to adjust the press nip conditions in a shoe press, such as the machine direction pressure curve across the nip. The pressure curve is influenced through the press nip so that the force is highest at the beginning and lower towards the end of the press nip, or vice versa. In such adjustment, the pressure shoe will primarily follow an arcuate line of travel centered on the central axis of the counter roll.

The reason why a machine direction adjusted pressure curve across the press nip is desired is, inter alia, that different qualities of paper or cardboard have different optimum pressure curves.

US Pat. No. 4,713,147 describes a shoe press with an extended press nip in a paper machine to remove water from a wet fibrous and porous paper or cardboard paper web. ing. This press is a rotating press
It includes a roll and at least one loading shoe that is pressed against the press roll to form a long squeeze zone. The loading shoe is a press
It can rotate about an axis parallel to the axis of the roll. The paper web to be dewatered is passed through a squeeze zone with at least one felt that receives water from the paper web. The loading shoe is supported on the carrier frame by support means. The center of gravity of the supporting force exerted by the supporting means on the shoe is displaceable in the dewatering direction of the paper web in order to allow adjustment of the pressure pattern occurring in the squeezing zone when processing different paper qualities. The displacement of the center of gravity is also carried out mechanically by moving the support means with respect to the shoe or hydraulically by changing the pressure in two separate pressure cushions in the support means.

Further, Swedish patent SE-C2-510609 includes a squeezing shoe and a counter roll between which an expansion nip for a paper web of paper or cardboard and a circulating flexible belt is formed. Described shoe presses for paper or cardboard. The shoe press further includes at least one press cylinder disposed between the horizontal beam and the press shoe and pressing the press shoe against the counter roll. Press shoes
There is a device arranged at the top of the cylinder, by means of which the press cylinder is fixed to the horizontal beam, which device can be separated. After separation of the fastening device, the press cylinder may be influenced by the eccentric member for moving in the machine direction and for adjusting the pressure profile of the shoe press.

European Patent 0933471, corresponding to US Pat. No. 6,083,352, which is incorporated herein by reference, discloses a shoe press that reduces problems due to thermal expansion of the press shoe. There is. This is because the shoe press has the ability to tolerate a relatively large stretch of the press shoe in a direction transverse to the machine direction and also other deformations of the press shoe. The disclosed shoe press includes a press shoe extending transversely along the length of a paper web passing through the press and a plurality of articulated liquids supported by a support and spaced along the shoe. Includes pressure loading cylinder. A cylinder separates the press shoe from the support and a counter roll or another backing member to apply pressure to the paper web being conveyed through the nip defined between the shoe and the backing member. The loading cylinder defines a working chamber that can be pressurized by the hydraulic fluid so that it can be pushed to. Each loading cylinder includes a piston member located inside the cylinder member. The piston or cylinder includes a two-part member having a first member fixed to the press shoe and a second member fixed to the support, while the remaining piston or cylinder includes a coupler. Since the press shoe of the shoe press disclosed in EP 0933471 can also be moved or tilted in the machine direction with respect to the support, the shoe press uses a forward movement of the shoe in the machine direction. Including a stop member for limiting.

Furthermore, Applicant's own Swedish unpublished patent application SE99
01636-2 describes a shoe press for a paper or cardboard machine. The shoe press includes a press shoe and a counter roller, which form between them an expanding nip for passing a paper web of paper or cardboard and an endless flexible belt, The shoe press also includes at least one press cylinder located between the horizontal beam and the press shoe included in the support system of the shoe press to press the press shoe against the counter roll. Includes. The cylinder or piston of the press cylinder is mounted in bearings and pivots about an axis that is eccentric to the axis that forms the axis of symmetry of the working space of the press cylinder. The shoe press further comprises a moving member for pivoting the cylinder or piston of the press cylinder to adjust the pressure profile of the shoe press, the moving member extending outside the mantle. Includes.

US Pat. No. 5,676,799 discloses an apparatus having an extended press nip for treating a fibrous paper web. With this device, at least 1
One surface is formed by a belt under pressure from at least one cylinder piston via a hydraulic contact pressure device comprising at least one support element,
Hereby, the pressurized fluid supply to the pressure pockets of the support element is ensured by one of the parts of the piston-cylinder unit being permanently connected to a part of the support element, whereby the piston-cylinder unit. The other part is kept movable in the machine direction and in one paper web movement direction of the element, whereby the support element is supported via a stop attached to the support part.

Experience has shown that many of the already known devices that act on the pressure curve in the machine direction of the extended press nip are unnecessarily complex and expensive, and when switching the pressure curve to another one. Often, a significant amount of time is required to make the necessary adjustments.

Furthermore, there is often the risk that the desired adjustment of the pressure curve in the machine direction is impeded during operation, which can lead to drivability and quality problems.

SUMMARY OF THE INVENTION Accordingly, a first object of the present invention is a running paper or cardboard paper web that allows adjustment between different pressure curves in a simple, inexpensive and reliable manner. It is to provide a pressing device having an expanding nip for squeezing.

This first object of the invention is arranged, according to a preferred embodiment of the invention, to form an expanding nip cooperating with a backing member for the passage of a paper web during pressing. Also, the press shoe is oriented transversely to the machine direction and backed by several loading cylinders placed along the press shoe to allow the paper web to be pressed during pressing. And a support that movably supports the press shoe toward the abutment member. At least a portion of the loading cylinder includes a first end intended to be secured to the press shoe and a second end intended to be secured to the support, whereby the loading cylinder Each has a principal axis in its longitudinal direction. The press shoe is displaceably positioned between various positions relative to the support and backing member to control the machine direction pressure curve across the press nip, thereby stopping downstream of the press shoe. The member is arranged.

According to the invention, the stop member is thus arranged displaceably between the various stop positions in the machine direction and fixably at these positions, whereby at least a part of the loading cylinder or the support is provided. , A member arranged eccentrically to one or several of the main shafts, the present eccentric position and the current stop position controlling the position of the press shoe during squeezing, whereby the press • Can be brought to various eccentric positions with respect to the spindle, so as to control the machine direction pressure curve over the nip.

A second object of the invention is to provide a procedure for controlling the machine direction pressure curve throughout the press nip in a pressing device according to the invention. This second object of the invention comprises, according to a preferred embodiment of the invention, a press shoe, a backing member, a support and a number of loading cylinders, at least a part of the loading cylinders being pressure shoes. By means of a pressing device, which comprises a first end intended to be fixed to the second end and a second end intended to be fixed to the support, each loading cylinder having a main axis in its longitudinal direction. This is accomplished by the means in which a press nip is provided. The press shoe is displaceable between various positions with respect to the support and the backing member to control the pressure curve, whereby a stop member is provided downstream of the press shoe.

According to the invention, the pressure curve in the machine direction is obtained by means of a support or a loading cylinder member eccentrically arranged with respect to one or more spindles by means of an expanding press nip with respect to the first spindle. Controlled by moving from an eccentric position to a second eccentric position, at the same time the stop member has a second eccentric position and a second stop position that change the position of the press shoe from a first position relative to the support and the backing member. The first stop position is transferred to the second stop position so as to change to the two positions.

Further objects of the invention will be apparent from the following description, and the features enabling the achievement of these objects are mentioned in the claims.

[0020]   Next, the present invention will be described in more detail with reference to the drawings.

Detailed Description of the Preferred Embodiments A schematic cross-sectional view in the machine direction of a shoe press apparatus according to a preferred embodiment of the present invention is shown in the attached FIGS. 1A and 1B, in which FIG. Press shoe 10
1 is in the first position and in FIG. 1B the press shoe 101 'is in the second position.

The accompanying FIGS. 2A and 2B show shoe shoes according to a particularly preferred embodiment of the invention.
A schematic cross-section in the machine direction of the pressing device is shown, with the press shoe 201 in the first position in FIG. 2A and the press shoe 201 ′ in the second position in FIG. 2B.

The press shoe 101; 201 (FIGS. 1A, 2A) in the first position causes a pressure curve that is predominantly “symmetrical” in the machine direction due to the extended press nip, whereby the pressure is initially low. The pressure rises from the value to the maximum value and then falls again.

On the contrary, the press shoes 101 ′; 201 ′ in the second position (FIG. 1B,
FIG. 2B) shows a pressure curve with a low pressure at the beginning of the press nip which increases towards the end of the press nip, ie the press shoes 101;
It produces a pressure curve with the maximum pressure displaced towards the end of the press nip, compared to the case when in position (FIGS. 1A, 2A). Of course, many different positions could be designed for the press shoes of the shoe press device according to the invention.

The shoe pressing apparatus according to the present invention is oriented to squeeze a continuous paper or cardboard, and press shoes 101, 10 aligned across the machine direction MD.
1 '; 201, 201', the press shoe includes a backing member 102; 2
02 is arranged to form extended press nips 103, 103 '; 203, 203' for the passage of paper webs 104; 204 during pressing.

The pressing device according to the invention further comprises a support 105; 205, which is arranged along the press shoe in order to make it possible to apply pressure to the paper web during pressing. The press cylinders 106, 206 support the press shoes in such a manner that they can be moved towards the backing member.

At least some of the loading cylinders 106: 206 are intended to be fixed to the press shoe 101; 101 ′; 201, 201 ′, the first end 110; 210 and the support 105, 205. Second intended to be fixed to
End portions 111; 211. Thus, an embodiment in which some of the cylinders are not fixed to the press shoe and / or the support but are held or controlled in their intended position in some other suitable way It can be considered to be within the scope of the invention.

Each loading cylinder 106; 206 has a main axis X; Y in its longitudinal direction. It is thus understood that the main shaft is a shaft which extends exclusively in the direction of extension of the loading cylinder.

As can be seen from the above, the press shoe of the pressing device according to the invention supports the pressure curves in the machine direction MD over the press nips 103, 103 ';203;203'. It is displaceably arranged between various positions 101, 101 '; 203, 203' with respect to the body and the backing member.

Stop members 107, 107 ′; 207, 207 ′ are arranged downstream of the press shoe of the pressing device according to the invention. Various types of stop members for limiting the movement of the shoe in the machine direction and also in the direction opposite to the machine direction are already known from the prior art documents mentioned above.

The stop members 107, 107 ′; 207, 207 ′ of the pressing device according to the invention are
It is arranged such that it can be displaced between various stop positions A, B; C, D in the machine direction MD and can be fixed at these positions. Thus, FIGS. 1A-1B and 2A
In the embodiment shown in Figure 2B, the stop member can be brought to two different defined stop positions and fixed there. It is also possible to envisage embodiments according to the invention having stop members that can be brought to and fixed in three or more defined stop positions.

At least some of the loading cylinders 106; 206 or the supports 105; 205 of the pressing device according to the invention are brought to different eccentric positions E, F; G, H with respect to the main axis X; Y. Members 108, 109, 108 ', 109', 208 eccentrically arranged with respect to one or several main axes X; Y
, 208 '. During squeezing, the current eccentric positions E, F; G, H and the current stop positions A, B; C, D control the position of the press shoes 101, 101 '; 201, 201', and thereby Press nip 103, 103 '; 203, 2
The above pressure curve is also controlled in the machine direction MD throughout 03 '.

According to a preferred embodiment of the invention shown in FIGS. 1A and 1B, the eccentrically arranged member is a male member 112 for fixing to the press shoe 101, 101 ′.
Recesses 108, 109; 108 in the first end 110 for receiving 113
It is composed of ', 109'. In this embodiment, the male members 112, 11
3 is constituted by a slide guide which is pressed into the recesses 108, 109; 108 ', 109' and into the corresponding recesses of the press shoe. Also, an advantageous embodiment is provided having a recess in the second end for receiving the male member for fixing to the support, or a recess in the support for receiving the male member for fixing in the second end. You can think.

In a particularly preferred embodiment of the pressing device according to the invention, the eccentrically arranged member is received in a recess 214 in the press shoe 201, 201 ′ for fixing to said press shoe 201, 201 ′. The first end 210 of the male member 208; 208 '. Also, a male member at the second end for receiving in the recess in the support for fixing to the support, or a support for receiving in the recess in the second end for fixing to the second end. It is also possible to envisage an advantageous embodiment with a male member in.

Accordingly, the male member described above includes a press shoe, a first end 210, a second end,
Alternatively, it may be constituted by individually penetrable parts 112, 113 or projections 208, 208 'integrated into the support.

In a particularly preferred embodiment, the fixation of the first and / or the second end is carried out by means of a male member as described above, such as a dwell 215, a locking pin or a press shoe 201, a first end, a second end. , Or providing a recess or cavity for receiving a similar member extending through a passage formed in the support. Therefore, in FIG.
In a particularly preferred embodiment as shown in FIG. 2B, the lock pin 215 is a press
It extends through a passage in the shoe 201.

In a particularly preferred embodiment of the pressing device according to the invention, the stop members 107, 10
7 '; 207, 207' is at least in the current stop position A due to the spacer elements 116, 116 ';
, B; C and D are fixed. The spacer element enables said abutment in the first stop positions A; C in the machine direction MD in the first positions 116, 216 and in the second position 116 '.
, 216 'has a geometric design that allows said abutment in the second stop position B; D. Of course, embodiments within the scope of the invention are also conceivable, in which the spacer element (or spacer elements) allows abutting contact with the stop member in three or more stop positions.

In the embodiment shown in FIGS. 1A-2B, the spacer element is constituted by a shelf that extends across the full width of the stop member transverse to the machine direction, which has its longitudinal axis to provide various stop positions. It can also be rotated around. Also consider an embodiment having multiple short spacer elements that can be rotated or twisted to provide different stop positions, or less advantageous embodiments having several different sized replaceable spacer elements. You can also

In one embodiment of the pressing device, at least some of the loading cylinders 106; 206 form at least one working chamber 121;
At least one cylinder portion is slidably connected to at least one piston portion 118; 218 by sealingly contacting the gaskets 119; Cylinder 10
6; 296 can be decreased to cause a shortening or 296 can be increased to cause an extension of the loading cylinder. In this embodiment, the cylinder portions 117; 217 provide the first ends 110; 210.

In an alternative embodiment (not shown), the piston part instead consists of a cylindrical coupling part, which slidingly connects the first cylinder part to the second cylinder part. Thus, in this embodiment, at least some of the loading cylinders have three parts that slide relative to each other such that the coupling part is a substantially cylindrical sleeve, the interior of which forms part of the working chamber. It is advantageous to do so.

On the other hand, the piston part (FIGS. 1A-2B) or coupling part is a large and heavy substantially cylindrical object 118; 218, at one or both ends of which a working chamber 121; 221
An embodiment of a pressing device according to the invention, in which the cylindrical body is formed, and in the case of some working chambers, the cylindrical object comprises one or more conduits between two ends for a pressure connection between the working chambers. It is possible to think of.

In yet another alternative embodiment of the pressing device according to the invention, the first and second cylinders are solid, substantially cylindrical objects, one end of which is surrounded by a connecting part to form a working chamber. Has been.

The backing member 102; 202 of the pressing device according to the invention comprises a counter
The flexible belts 122; 222, preferably in the form of rolls and preferably in the form of sleeves, are arranged in an endless loop and are pressed during pressing.
It runs between the shoes 101, 101 '; 201, 201' and the paper or cardboard paper webs 104, 204.

In pressing, the paper or cardboard paper webs 104, 204 passing through the press nips 103, 103 ′; 203, 203 ′ are preferably supported by one or more water receiving fabrics. Fabrics such as press felts are well known in the art.

The pressing device according to the invention is particularly advantageously used for wet pressing or calendering of paper or cardboard paper webs.

Next, the procedure according to the invention for controlling the pressure curve in the machine direction MD through an extended press nip in a pressing machine, when appropriate to the attached FIGS. 1A to 2B.
Will be described with reference to.

Accordingly, the press nips 103, 103 ′; 203, 203 ′ have press shoes 101, 101 ′; 201, 201 ′, backing members 102; 202, supports 105, 205, and multiple loadings. Provided by a device according to the invention, which includes cylinders 106, 206.

At least some of the loading cylinders have press shoes 101, 1
01 '; 201, the first end 110; 210 intended to be fixed to 201'
And a second end 111; 211 intended to be fixed to the support 105, 205
And so that each of the loading cylinders 106, 206 has a principal axis X, Y in its longitudinal direction. Therefore, it is possible to envisage embodiments of the invention in which not all loading cylinders are fixed to the press shoe and / or the support.

The press shoe is movable between various positions 101, 101 ′; 201, 201 ′ with respect to the support and the backing member in order to control the above-mentioned pressure curve, whereby the stop member 107, 107 '; 207, 207' are provided downstream of the press shoe, thus limiting the movement of the press shoe in the machine direction.

In the procedure according to the invention, the support or loading cylinder 106; 206
A member 108 disposed eccentrically with respect to one or more of the principal axes X, Y at
109; 208 controls the pressure curve in the machine direction MD through the expansion press nip 103; 203 and moves the loading cylinder from the first eccentric position E; G to the second eccentric position F; H with respect to the spindle. , Stop member 116; 216
Is moved from the first stop position A; C to the second stop position B; D. Second eccentric position F;
H and the second stop position B; D indicate the position of the press shoe relative to the support 105; 205 and the backing member 102; 202 from the first position 101; 201 to the second position 101.
It will be controlled to ';201'. As will be apparent from the above, this will cause the pressure curve to change in the machine direction through the extended press nip.

In a preferred embodiment of the procedure according to the invention, an eccentric member is provided in the first end 110 in the form of a recess 108, 109; 108 ′, 109 ′, the first end of which is a press shoe 101; 101 ′. The male members 112; 113 are received so as to be fixed to. Plan an embodiment (not shown) of the means according to the invention having a member eccentrically arranged in the form of a recess at the second end, which receives the male member so that the support is fixed to the second end. You can also

In a particularly preferred embodiment of the procedure according to the invention, the eccentrically arranged member comprises the first
The male member 208; 208 of the first end 210 received in the recess 214 in the press shoe 201; 201 'so that the end is secured to the press shoe.
It is provided in the form of '. A second end, such as in the form of a male member of the second end received by a recess in the support, such that the second end is fixed to the support, or such that the support is fixed to the second end. It is also possible to plan the embodiment in the form of a male member of the support which is received by the recess of the part.

In a particularly preferred embodiment of the procedure according to the invention, a recess or cavity is advantageously provided in said male member 208; 208 ′ and a passage is provided at the first or second end of the press shoe 201. , Which allows the lock pin 215, the pile, the lock screw,
Or a similar member is guided through the passage into the recess or cavity to secure the first end and / or the second end.

In a particularly preferred embodiment of the procedure according to the invention, stop members 107, 107 ′;
207, 207 'are fixed in the recess of the support by spacer elements 116, 116'; 216, 216 'which abut the support at the current stop positions A, B; C, D. In this embodiment, the spacer element is initially in the first stop position A; C.
Are moved to a first position 116; 216 for abutting at and subsequently moved in a machine direction to a second position 116 ';216' for abutting at a second stop position B; D.

In another advantageous embodiment of the procedure according to the invention, the first number of loading cylinders 206 described above is double-acting, while the second number of loading cylinders is single. It is dynamic. It can be seen here that the double-acting type allows the loading cylinder to generate force both in its extension and contraction directions, but in the single-acting type, the loading cylinder produces force only in its extension direction. It means having the ability. In this embodiment, the fixed is the first number of loading cylinders 2
Only at 06, carried out by said male member 208, 208 ', whereby
It is particularly advantageous for the first number to be less than the second number and not more than one third of the second number. This embodiment does not leave the press shoe at all when the non-fixed loading cylinder is in pressure-free condition and not in contact with the press shoe. Can be rapidly rotated or moved to the desired position, thus significantly reducing the switching time between the various pressure curves.

The shoe press device according to the present invention has both double acting (having both extension and contraction forces) and single acting (having only extension force) loading cylinders 106; 206.
, The double-acting loading cylinder 206 is advantageously of the type shown in FIGS. 2A and 2B, while the single-acting loading cylinder 106 is shown in FIG. 1A.
Advantageously, it is of the type shown in FIG. 1B. While still within the scope of the invention, the double-acting loading cylinder and the single-acting loading cylinder are both of the same type, or the loading cylinder is some other suitable type within the scope of the claims. It is possible to plan embodiments of

The present invention should not be construed as limited to those described herein in relation to various embodiments or shown in the accompanying figures. Rather, the scope of the invention is defined by the claims.

The mechanical and hydraulic, alternatively pneumatic, components that are part of the shoe press apparatus according to the present invention should be well known to those skilled in the art, and the above-mentioned European patents No. 0933471 is described and not described in detail herein.

[Brief description of drawings]

FIG. 1A is a schematic cross-sectional view in the machine direction of a shoe press apparatus according to a preferred embodiment of the present invention with the press shoe in a first position.

1B is a schematic cross-sectional view in the machine direction of the shoe pressing apparatus according to FIG. 1A, in this case the pressing shoe in a second position.

FIG. 2A is a schematic cross-sectional view in the machine direction of a shoe press apparatus according to a particularly preferred embodiment of the present invention with the press shoe in a first position.

2B is a schematic cross-sectional view in the machine direction of the shoe pressing apparatus according to FIG. 2A, in this case the pressing shoe in a second position.

Claims (15)

[Claims] 1. A pressing device for squeezing a paper web carried in a machine direction through an expansion nip between a pressing device and a backing member, the expansion nip through which the paper web passes. Lined with the backing member to extend in a direction transverse to the machine direction substantially along the entire width of the paper web,
A press shoe arranged to be moved between various positions with respect to the backing member in order to control the pressure curve in the machine direction through the nip, and the press shoe exerts pressure on the paper web To support the press shoe so that it can move in the direction of the load toward the backing member, and it is spaced along the press shoe in a direction transverse to the machine direction, each of which has a longitudinal main axis. A plurality of extendable and retractable loading cylinders having a first end fixed to a press shoe and a second end fixed to a support and having an extension and contraction along a main axis. And a stop member located downstream of the press shoe and movably between various stop positions in the machine direction and fixed at those positions. At least some of the binding cylinders or supports include members eccentrically arranged with respect to one or more of the main shafts, these members having an eccentric position and a stop position of said pressing shoe during pressing. A pressing device that can be in various eccentric positions with respect to the spindle so as to control the position and thereby control the pressure curve in the machine direction through the press nip. 2. A eccentrically arranged member at a first end of a loading cylinder for receiving a male member fixed to a press shoe, a loading for receiving a male member fixed to a support. Pressing device according to claim 1, comprising a recess in the second end of the cylinder or in a support for receiving a male member fixed to the second end. 3. A male member fixed to the first end of the loading cylinder for receiving the eccentrically arranged member in the recess of the press shoe, and a loading cylinder for receiving in the recess of the support. The press apparatus according to claim 1, comprising a male member fixed to the second end or a male member fixed to a support for being received in a recess of the second member. 4. The male member comprises a locking pin, stake, locking screw, or similar member passing through a passage provided in the member having the recess for receiving the male member. The press device according to item 3. 5. The stop member is fixed in a selected stop position by means of a spacer element arranged at least in a recess of the support, the spacer element abutting the stop member, the spacer element being in the first position a first position. The press apparatus according to claim 1, which has a geometrical design that abuts the stop member at the stop position and abuts the stop member at the second stop position in the machine direction at the second position. 6. At least some of the loading cylinders include at least one cylinder portion slidably coupled to at least one piston portion in sealed form by contact with a sealing member, at least one Forming two working chambers, in which the pressure of the pressurizing medium can be reduced to shorten the loading cylinder or increased to cause extension of the loading cylinder; The pressing device of claim 1, wherein the press forms a first end of the loading cylinder. 7. A method for controlling a pressure curve in a machine direction through an expanded press nip, the press nip comprising a press shoe and a backing member forming the press nip with the press shoe. A support and a press, the support movably supporting an upper of the press shoe, and at least some including a first end fixed to the press shoe and a second end fixed to the support. Provided by a pressing device comprising a plurality of loading cylinders arranged between the shoes, each loading cylinder having a longitudinal main axis, along which the loading cylinder extends and contracts to produce a pressure curve A method by which the press shoe can be moved to various positions in the machine direction with respect to the support and backing member for control. Providing a stop member downstream of the shoe and moving the stop member in the machine direction from the first stop position to the second stop position, and between the support and at least some of the loading cylinders, or at least some of the loading cylinders; Providing a member engaging between the heel and the press shoe for controlling the position of the press shoe, the member being eccentrically arranged with respect to one or more of the main shafts; The first eccentric position is moved to the second eccentric position with respect to the main shaft, so that the second eccentric position and the second stop position are pressed from the first position to the second position with respect to the support and the backing member. A method that includes controlling the position of the shoe. 8. An eccentrically arranged member is provided in the form of recesses in one of the press shoe and the support, these recesses being loaded with respect to said one of the press shoe and the support. 8. The method of claim 7, wherein a male member on the loading cylinder is received to secure the cylinder. 9. A cavity is provided in each of the male members and a passage is provided in the one of the press shoe and the support to receive one of a locking pin, a stake, and a locking screw, and a lock is provided. The method of claim 8, wherein one of a pin, a pile, a locking screw is received in the cavity to secure a loading cylinder to the one of the press shoe and the support. 10. An eccentrically arranged member is provided in the form of a male member on one of the press shoe and the support for fixing the loading cylinder to said one of the press shoe and the support. The method of claim 7, wherein the method is received in a recess in the loading cylinder. 11. A stop member is fixed in a selected stop position by a spacer element arranged at least in a recess of the support, the element abutting the stop member, the spacer element being first in the machine direction. 8. The method of claim 7, wherein the first position is abutted against the stop member in a position and the spacer element is then moved into the second position to abut the stop member in a second position. 12. A first number of the plurality of loading cylinders includes a double-acting cylinder, a second number of the plurality of loading cylinders includes a single-acting cylinder, and the fixing of the loading cylinder by the male member. Is the first number loading
9. The method of claim 8, wherein the method is performed only in cylinders, the first number being less than the second number. 13. A first number of said plurality of loading cylinders comprises a double-acting cylinder, a second number of said plurality of loading cylinders comprises a single-acting cylinder, and fixation of said loading cylinder by said male member. Is the first number loading
The method according to claim 9, wherein the method is performed only in the cylinder, the first number being less than the second number. 14. The method of claim 12, wherein the first number is less than one third of the sum of the first number and the second number. 15. The method of claim 13, wherein the first number is less than one third of the sum of the first number and the second number.