Classifications

• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
  • D21F3/00—Press section of machines for making continuous webs of paper
  • D21F3/02—Wet presses
  • D21F3/0209—Wet presses with extended press nip
  • D21F3/0218—Shoe presses

Definitions

• the present invention relates to a press in a machine for production or treatment of a continuously running web of cellulosic fibrous material, for instance a paper, tissue or board machine, which press comprises a press device and a counter element arranged opposite the press device, which is arranged to form a press zone in the form of an extended press nip in cooperation with the press device having a certain width in the machine direction W for pressing the fibrous web as it runs through the press nip, which press device comprises a press shoe; a support element for supporting and pressing the press shoe in direction towards the counter element via - at least one power device arranged between the press shoe and the support element for application of a certain pressure onto the fibrous web at the pressing operation; a flexible and preferably impermeable belt that is arranged to run in a continuous loop around the support element and through the press nip having a sliding contact with the press shoe; and a first guide for the press shoe arranged downstream of the press shoe, which first guide is movable between
• the present invention also relates to a method for altering the pressure profile in a press in a machine in which a continuously running web of cellulosic fibrous material is produced or is treated, for instance a paper, tissue or board machine, which press comprises a press device and a counter element arranged opposite the press device, which forms a press zone in the form of an extended press nip in cooperation with the press device having a certain width in the machine direction W so that a pressing of the fibrous web occurs during the passage through the press nip, which press device comprises a press shoe; a support element that supports and press the press shoe in direction towards the counter element via - at least one power device which is arranged between the press shoe and the support element and which power device is applying a certain pressure onto the fibrous web during the pressing operation; a flexible and preferably impermeable belt that runs in a continuous loop around the support element and through the press nip having a sliding contact with the press shoe, and a first guide for the press shoe arranged downstream of the press shoe and
• Presses of above specified type are known in different designs and have since long ago been used in production of different paper and cardboard grades, especially for wet pressing with the intention to raise the dry solids content of the fibrous web, but may also be used for calendering with the intention to improve surface properties or other physical properties of the web.
• presses that comprise press devices having an extended press nip and which presses and press devices usually are named shoe presses and shoe press rolls respectively, is that they provide a plurality of advantages through their longer press nips compared with presses having a conventional press nip .
• the expression "a conventional press nip" implies in this context, a press nip in which two rigid rolls, having cylindrical cross-section, are cooperating with each other under pressure.
• the dwell time for the fibrous web in this type of press nip is only some few milliseconds because of the short press nip.
• the dwell time, during which the wet fibrous web is exposed to a pressure is considerably longer, which results in much higher water flows from the web.
• tissue which has a low basis weight and which is used for production of household paper, for instance paper towels and other hygiene products
• the bulk i.e. the relationship between the volume and the weight of the paper, is high because high bulk paper has a desirable combination of softness and high absorption power.
• the pressure in the nip is not just regulated in the press direction but also that the nip pressure in the machine direction and across this may be distributed in a suitable way within the press zone between the press shoe and the counter element, i.e. that a certain and defined pressure profile is maintained in every longitudinal section and cross-section within said press zone.
• box girders In relation to I-beams, box girders have a higher torsional rigidity but they also have certain disadvantages. For instance, the assembly may become more complicated, which in its turn may make the shoe press construction more expensive. It is therefore desirable to find a shoe press construction that enables the use of an I-beam support element and in which shoe press construction the pressure profile may be changed without any risk for pivoting of said I-beam support element.
• EP-Al-0 345 500 a press is known, in which several power devices are arranged as above, i.e.
• power devices each also comprises several press cylinders arranged in a row across the fibrous web and by which the distribution of pressure across the machine direction may be regulated by varying the pressure in each press cylinder across the fibrous web.
• the shoe press known through EP-Al-0 345 500 comprises a strong support element that is fixedly mounted across the machine direction at the support element of the shoe press roll and downstream of the press nip, and against which support the press shoe is in loose contact for obtaining of the wanted support and guiding of the same.
• the European patent application EP-A2-0 933 471 shows an additional example of a known shoe press, which comprises a fixed support that is arranged downstream of the press shoe and across the cross machine direction for absorbing and preventing unwanted horizontal forces and movements outwards in the machine direction.
• the shoe press also comprises additional guides and supports, which also are supposed to limit or prevent unwanted movements in the upstream direction and across the machine direction.
• a front guide which is directed forwardly in the machine direction is arranged in the middle of the press shoe and two side guides are arranged with one guide at each end part of the press shoe.
• Each side guide has a projection that projects from the press shoe across the machine direction.
• the front guide is cooperating with the fixed support located downstream for limiting movements across the machine direction and the two projections of the side guides are cooperating with two fixed stops for limiting movements in the upstream direction of the press shoe and for preventing an angular adjustment of the press shoe in relation to an axis across said machine direction, i.e. that one side of the shoe is situated more upstream than that of the opposed side.
• the shoe press shown in EP-A2-0 933 471 has an entirely fixed support for the press shoe, and therefore also the position of the press shoe is entirely fixed in relation to the counter roll.
• the change of the pressure profile is done exclusively by changes in or of the position of the power devices so that the press shoe in its turn is pivoted around its own longitudinal axis. No displacement of the press shoe occurs in the horizontal plane, i.e. in the web feed direction.
• the alteration of the pressure profile is done by mounting different strips, having varying cross-section dimensions, across the machine direction to the upstream and downstream longitudinal sides of the press shoe and/or of the power device, whereby the position of the power device may be altered in relation to the still fixedly arranged supports and stops by moving the upstream mounted strip from a position along the upstream side of the press shoe to a position at the downstream side of the press shoe and vice versa for the strip mounted downstream.
• the two strips have different cross- section dimensions, and therefore the power device is moved both in relation to the support element and to the press shoe whereby the pressure profile thus will be changed.
• the supports and the guides for the press shoe are fixed , i.e. entirely immovable, and all maneuvering operations, i.e. all controlled changes in the position of the press shoe and hence the pressure profile, is effected exclusively by changes in or of the position of the power devices so that the press shoe in its turn is pivoted around its own longitudinal axis.
• the horizontal plane i.e. the feed direction of the web, no displacement of the press shoe is done.
• the displacement of the entire or of essential parts of the power device in relation to the support element and the press shoe enforces an unnecessarily complicated and expensive construction.
• a shoe press is known through US-A-5, 676,799 , wherein a movable downstream support has been arranged for the press shoe and in which it is indicated that the pressure profile may be influenced by positioning of the press shoe.
• the shown shoe press comprises only one guide that is arranged downstream, and therefore only the horizontal forces and movements in the machine direction may be controlled.
• the stop lacks an accurate and exact arrangement for adjusting its position in the machine direction.
• the press devices in the described presses are, in addition to the imperfections during operation mentioned above, also proportionately complicated to manufacture, to install and to dismount at service or when changing press devices.
• the object of the present invention is to provide a press having a substantially improved press device, which press device has guides and supports that functions in a considerably better way than earlier and also in all directions necessary, which is uncomplicated to manufacture having low production costs as a consequence, which is simple to assemble and dismount in case of servicing or changing and which press device works in a satisfying way also when an I-beam support element is being used.
• the press is characterized in that the press device further comprises a second guide for the press shoe arranged substantially upstream of the press shoe or at least is functioning from the upstream side of the press shoe and substantially in the machine direction W and which second guide is movable between at least a first and a second position.
• the first guide for the press shoe is arranged in a dismountable and adjustable way and comprises at least one support and at least one spacing member;
• each support and spacing member is manufactured in the form of a profiled rail that extends along the press shoe;
• the support comprises two parts, which consist of a lower assembly part and an upper contact part, against which contact part the press shoe is in contact with its long side facing downstream;
• the support is arranged in a displaceable manner in relation to the support element and to the power device by means of elongated, through going grooves arranged in the assembly part, which grooves extend parallel to each other in the machine direction;
• the support is screwed tightly but releasably to the support element by means of screws arranged in the grooves;
• the spacing member comprises several different part members having different and predetermined widths for obtaining a predetermined and adjustable position for the upper contact part against the press shoe and thereby also for variation of the position of the press shoe in relation to the integrated power devices;
• the second guide for the press shoe comprises two lateral supports, which are arranged in a dismountable and displaceable way at the cross ends of the press shoe;
• each lateral support comprises a lower assembly part for mounting of the lateral support to the support element and an upper contact part having a preferably vertical contact surface facing downstream for an upstream guide of the press shoe;
• the press shoe comprises a fixed projection at each of its two cross ends, and with which two projections the contact parts are arranged to be in contact, each having a contact surface of its own;
• the second guide for the press shoe comprises two lateral supports, which lateral supports are fixed at the cross ends of the press shoe in a dismountable and turnable way by means of fasteners;
• each lateral support comprises a lower assembly part for assembling the lateral support to the support element and two upper contact parts being arranged at different distances from the center of the lateral support;
• the upper contact parts each comprises a preferably vertical contact surface that is facing the other contact surface
• the press shoe comprises two affixed projections, one at each of its cross ends, and against which projections the contact surface of the most upstream positioned contact part is arranged to bear on for an upstream guide of the press shoe;
• the press shoe comprises an eccentric in the form of an eccentrically, pivotable projection arranged at each of the cross ends of the press shoe;
• the spacing member is arranged in a turnable or pivotable way
• said power devices comprise a number of press cylinders, which are arranged along the press shoe in a straight line and at a certain distance from each other;
• the second guide consists of a similar, but reversed, guide as the first guide arranged downstream, and which second guide is arranged in a dismountable and adjustable way at several predetermined and fixed positions against and in relation to the first guide;
• the counter element comprises a rotatably journalled counter roll that is substantially parallel with the press device;
• the support element for supporting the press shoe consists of an I-beam having a substantially flat waist;
• the press shoe extends in one single piece across the entire belt and that a friction-absorbing layer of hydraulic fluid having a certain hydrokinetic pressure is arranged between the press shoe and the belt.
• the method according to the invention is characterized in that a second guide for the press shoe, which is arranged substantially upstream of the press shoe or at least on the upstream side of the press shoe, is acting substantially in the machine direction W and which second guide is transferred between at least a first and a second position by being dismounted and/or adjusted.
• Fig. 1 is a schematic side view and cross-section of parts of a press with an extended press nip according to a first embodiment of the present invention having a press device and a rotatably journalled counter roll opposite to the press device, which press device comprises a press shoe, which is arranged at a first, operative position by means of one upstream and one downstream, adjustable first and second guide for guiding and supporting the press shoe;
• Fig. 2 is a schematic side view and cross-section of the press according to figure 1 with the press shoe at a second, operative position
• Fig. 3 is a schematic side view and cross-section of parts of a press with an extended press nip according to a second embodiment of the present invention, in which the press shoe is arranged at a first operative position by means of adjustable guides, one downstream and one first and one second guide arranged at each cross end of the press shoe
• Fig. 4 is a schematic side view and cross-section of the press according to Fig. 3 with the press shoe at a second operative position;
• Fig. 5 is a schematic side view and cross-section of parts of a press with an extended press nip according to a third embodiment of the present invention, in which the press shoe is arranged at a first operative position by means of adjustable guides, one downstream and one first and one second guide arranged at each cross end of the press shoe having a somewhat different design:
• Fig. 6 is a schematic side view and cross-section of the press according to Fig. 5 with the press shoe at a second operative position;
• Fig. 7 is a schematic side view and cross-section of parts of a press with an extended press nip according to a fourth embodiment of the present invention, in which the press shoe is arranged at a first operative position by means of adjustable guides, one downstream and one first and one second guide arranged at each cross end of the press shoe, which second guide also comprises an eccentric;
• Fig. 8 is a schematic side view and cross-section of the press according to Fig. 7 with the press shoe at a second operative position;
• Fig. 9 is a schematic side view of a press according to the invention comprising a support element in the form of an I-beam.
• parts of a press 1 are schematically shown in a side view and cross-section, for instance a wet press or a calender, which is arranged in a machine for the production or treatment of a continuously running web 2 of cellulosic fibrous material, for instance a paper, tissue or board machine, during which production or treatment the fibrous web 2 is, for instance, dewatered by extrusion of water, compressed, surfaced, treated for achieving the correct thickness, etc.
• the press 1 comprises a press device 3 and a counter element 4 arranged opposite to the press device 3, which in the embodiments shown in the figures comprises a rotatably journalled counter roll 4 with the rotation direction R.
• the counter roll 4 is arranged to form a press zone in the form of an extended press nip 5 having a certain width in the machine direction W for pressing the fibrous web 2 during its passage through the press nip 5.
• the press device 3 comprises a press shoe 6, which is arranged substantially across the fibrous web 2, a support element 7, preferably an I-beam, arranged substantially horizontal for supporting the press shoe 6 and at least one power device 8 arranged between the press shoe 6 and the support element 7 for applying a predetermined pressure against the underside 9 of the press shoe 6 in a direction towards the counter element 4 and thereby also against the fibrous web 2 via the press shoe 6.
• the press shoe 6 comprises a concave mating surface 10 facing the counter roll 4, which mating surface 10 is provided with a radius that equals the curvature of the counter roll 4.
• the press device 3 also comprises a flexible and preferably impermeable belt 11 that is arranged to run in a continuous loop around the support element 7 and through the press nip 5 having a sliding contact with the mating surface 10 of the press shoe 6.
• the impermeable web loop 11 may be attached at each side edge to a rotatable roll head for forming a formable press roll having a flexible mantle (not shown) or be arranged to run over a number of rolls, not shown, and through the press nip 5, wherein the fibrous web 2 is pressed between the web loop 11 and a determined part of the surface of the counter roll 4.
• the press shoe 6 comprises a feed conduit 13 for pressurized hydraulic fluid, which is attached along the upstream side 12 of the press shoe 6 and which feed conduit 13 is providing one or more hydrostatic pressure pockets, which are arranged in said mating surface 10 (not shown), via a channel system in the press shoe 6.
• the function of the hydraulic fluid is to form and maintain a friction absorbing layer between the press shoe 6 and the belt 11, which press shoe 6 preferably extends in one piece across the entire belt 11, at the same time as a hydrokinetic pressure is obtained between them.
• the power device 8, which preferably is hydraulically or pneumatically driven, is attached to the support element 7 at its lower end part by means of suitable attachment means, as for instance screws (not shown), and is consequently arranged in a stationary way in relation to said support element 7.
• the press shoe 6 is, within certain determined limits, arranged in a way that is freely movable in all directions in relation to the same power device 8 and at the upper end part of this, see in more detail below.
• the power device 8 comprises a number of press cylinders 14, which are mounted at a certain distance from each other in at least one linear row along the support element 7, and which press cylinders 14 are fixedly connected to the support element 7 but arranged against the underside 9 of the press shoe 6 in said movable way at its upper end parts.
• the press cylinders 14 comprise a combination of several part members, at least comprising one cylinder 15 and one piston 16 and where either the cylinder 15 or the piston 16 may be in two parts, in which the integral part members 15, 16 are arranged in a displaceable way in relation to each other in the press direction, but also somewhat tiltable by means of a gap, hence arranged between said part members 15, 16 and possibly also between the press shoe 6 and the upper part member 15, 16, which is joined to the press shoe 6 in a movable way, for instance by a recess, hence arranged in the press shoe 6.
• the press shoe 6 may rest freely onto each upper piston end (not shown) of a press cylinder 14 for obtaining said free mobility in all directions, which piston end may be somewhat roundish or may comprise a bearing.
• a press cylinder 14 for obtaining a floating support for the press shoe 6 in relation to the support element 7, we refer, for instance, to the documents mentioned above.
• a rectangular assembly area 17 in the form of a shallow, flat recess is milled in the top surface 18 of the support element 7 facing the press shoe 6.
• the assembly area 17, which extends in the longitudinal direction of the support element 7, is limited by two longitudinal and two transverse edges 19, 20, which edges 19, 20 are parallel to each other.
• the power device or the power devices 8 is/are mounted in the way described above.
• a plurality of threaded holes 21, having a determined and common dividing, are milled within said recess 17 and arranged in one or more linear row/s along, and at a certain distance from, the upstream and/or the downstream located longitudinal edge 19', 19.
• a first guide 22 for the press shoe 6 is arranged in a dismountable and adjustable way along the longitudinal edge 19 located downstream.
• Each such downstream guide 22 comprises at least one support 23 and at least one spacing member 24, which supports 23 and spacing members 24 may each be produced in one elongated piece, each preferably in the form of a profiled rail extending along the entire length of the press shoe 6, but they may also consist of a plurality of parts distributed in the cross-direction.
• the support 23 comprises two parts, which consist of a lower assembly part 25 and an upper contact part 26, which latter extends from the lower assembly part 25 in a substantially right angle in relation to the support element 7 and against which contact part 26 the press shoe 6 presses with its downstream facing long side 27.
• the support 23 is arranged in a displaceable way in relation to the support element 7, to the downstream located longitudinal edge 19 and to the power device 8 by means of elongated, parallel grooves 28 milled through the assembly part 25, which grooves 28 extend in the machine direction and in which grooves 28 screws 29 are tightly but releasably screwed in the threaded holes 21 mentioned above.
• the spacing member 24, which is turnable or pivotable, is clamped between the downstream located longitudinal edge 19 and the assembly part 25, which latter also comprises a longitudinal recess 30 for said spacing member 24.
• the spacing member 24 has a cross-section profile, which profile is very precisely sized and comprises several different part members 24a, 24b, etc., having different and predetermined widths a, b, c, d, etc.
• the position of the press shoe 6 in relation to the longitudinal edge 19 located downstream, and thereby also in relation to power devices 8, counter elements 4 and vertical central axis Y of the support element 7, may therefore be varied in a simple, effective and very exact way according to the necessary properties for the present press situation. Since the power device arrangement 8, in the press 1 according to the invention, always is fixedly attached and centered to the vertical central axis Y of the support element 7, the pressure resultant force that occurs during the pressing operation will always have a vertical component part along said central axis Y, regardless of which position the press shoe 6 takes, and which vertical component part then does not give any additional torque.
• the press device 3 also comprises an additional and second guide 32 for the press shoe 6, which is arranged substantially upstream or at least working from the upstream side and substantially in the machine direction against the press shoe 6.
• this second guide 32 constitutes of a similar but reversed guide 32 as the first guide 22 arranged downstream and which second guide 32 also is arranged in the same way as the first guide 22, i.e. in a dismountable and adjustable way, at several predetermined, fixed positions against, and in relation to, the upstream, longitudinal edge 19'.
• the second guide 32 for the press shoe 6 comprises two lateral supports 33, which lateral supports 33 are arranged in a dismountable way at the cross ends 35 of the press shoe 6 by means of fasteners 34, threaded holes 21' and elongated, through grooves 28', which extend in a straight line in the machine direction. Furthermore, the lateral supports 33 are steplessly displaceable along each of the two transverse edges 20, 20' between at least two positions, which are predetermined and fixed by the fasteners 34 and the grooves 28'. Each lateral support 33 comprises two parts, which parts consist of a lower assembly part 36 for assembly of the lateral support 33 to the support element 7 and an upper contact part 37.
• This contact part 37 extends from the lower assembly part 36 at a substantially right angle relative to the support element 7 and comprises a preferably vertical contact surface 38 facing downstream.
• the press shoe 6 also comprises a fixed projection 39 at each of its both cross ends 35, against which two projections 39 the contact parts 37 are arranged to abut, each having a contact surface 38 for achieving an upstream guiding of the press shoe 6.
• the second guide 32 for the press shoe 6 comprises two lateral supports 33, which lateral supports 33 are attached in a dismountable way by means of fasteners 34 and threaded holes 21' at the cross ends 35 of the press shoe 6 and also arranged in a turnable way along each of the two transverse edges 20, 20'.
• Each lateral support 33 comprises three parts, which parts consist of a lower assembly part 36 for assembly of the lateral support 33 to the support element 7 and two upper contact parts 37, which are arranged at to two different distances from the lateral support 33 center.
• each of these contact parts 37 extends from the lower assembly part 36 at a substantially right angle relative to the support element 7 and which upper contact parts 37 each comprise a preferably vertical contact surface 38 facing each other.
• the press shoe 6 comprises two fixed projections 39, one at each of its cross ends 35, and against which projections 39 the contact surface 38 of the most upstream located contact part 37 is arranged to abut for an upstream guiding of the press shoe 6.
• this press 1 comprises the same component parts, which are arranged in the same way as the third embodiment shown in the figures 5 and 6, except for the difference that the press shoe 6 instead of the fixed projections 39 comprises an eccentric 40 in the form of an eccentrically pivotable projection 39 arranged at each cross end 35 of the press shoe 6.
• a press 1 is shown in a schematic side view comprising a support element 7 in the form of an I-beam.
• the I-beam has a substantially flat waist 41 and the power device arrangement 8 is arranged to function with its resultant force F in alignment with the center plane of the waist 41 in such a way that regardless of the pressure curve set, the press cylinders 14 still work in alignment with the center plane of the waist 41. This because they are arranged in a symmetric and fixed way relative to the waist 41. Thereby may an adjustable pressure profile be obtained while still using an I-beam.
• the guides 22, 32 are thereafter once again tightly screwed, after which the position of the press shoe 6 in figure 1 thus has been moved somewhat downstream compared with figure 2.
• the downstream located guide 22 is moved in the same way as described above, while, for the different embodiments of the second guide 32, this is done in the following way.
• each of the lateral supports 33 is loosened so much from the support element 7 that they may be moved in the same direction and as equally much as the downstream located guide 22 has been moved, after which the lateral supports 33 once again are tightened to the support element 7, having a renewed contact against the projection 39 of the press shoe at the new operative position for the press shoe 6.
• each of the lateral supports 33 is entirely loosened from the support element 7, turned a half turn, after which the lateral supports 33 once again are tightened to the support element 7, now having a renewed contact against the projection 39 of the press shoe with the earlier, in relation to the first operative position, inactive contact surface 38 of the contact part 37, which, because of the two different distances of the contact parts 37 from the center of the lateral supports 33, equals the accomplished movement of the press shoe 6 by the first guide 22.
• the first guide 22 is moved in the same way as described above, while the positions of the lateral supports 33 of the second guide 32 are being retained unaltered. Instead, the eccentric 40 at both cross ends 35 of the press shoe 6 is pivoted to a new position, in which new position the eccentrically pivotable projection 39 is in afresh contact with the contact surfaces 38 of the lateral support 33 for guiding and supporting the press shoe 6 at the new, and for the press shoe 6, second operative position.
• the operative positions of the guides 22, 32 may, of course, be more numerous than the two (first and second) operative positions shown in the figures and they may be achieved in a numerous different ways in addition to the ways shown, having spacing members 24, fasteners 29, 34 and eccentrics 40, for instance by means of guide pins, wedges, eccentrically arranged spacing members etc.
• the counter element also may consist of a second press device, preferably a shoe press roll in which the press shoe then is adapted to the press shoe of the first press device so that their sliding surfaces are cooperating in forming a determined press zone there between.
• the actual press shoe is preferably designed in one piece, while the power device or the power devices preferably comprises/comprise several press cylinders having a preferably even distribution along the press shoe.
• one or more, permeable or impermeable clothings may be arranged to run in a loop of its own across a number of guide rolls and through the press nip together with the fibrous web and the belt.
• the said clothings may for instance comprise one or more press felts, which are running trough the nip together with the wet fibrous web while water is being transferred to the press felts when being pressed in the nip.
• the press may consist of a calender or another finishing unit, in which the then substantially entirely dried fibrous web is surfaced and/or shaped, for instance calendered, imprinted etc.
• the press according to the invention may also be used for other webs than paper and cardboard, for instance tissue.
• the power device may then also comprise several, preferably two, mutually parallel rows having several press cylinders in each row across the belt and along the press shoe.
• the press cylinders may also be divided into groups for variation of the pressure across the press shoe.
• the fixed edges in the above-described embodiments, which are formed of the lowered assembly area may, of course, instead consist of edges or other suitable supports mounted on top of the top surface of the support element or projecting from the support element for determining of set baselines from which diverse, nearly exact positions for the press shoe may be set by means of spacing members cooperating in pairs, which together give the selected position for the press shoe.
• the second guide may, in the case it consists of lateral supports, also guide directly or indirectly against the upstream side of the press shoe instead of against the projections mentioned above.
• the second guide instead of the press shoe, may comprise the described projections, and which projections then in turn run in therefore arranged grooves in the press shoe.
• the first and downstream arranged support is moved equally much as the shoe, which then also is the fact for the second guide, which is moved equally much and in the same direction as the first guide.
• different sets of guides having different geometry (length in the machine direction), may be used. The adjustment may then be done by changing one guide by another.

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• 2000
  • 2000-05-29 SE SE0002010A patent/SE516410C2/sv not_active IP Right Cessation
• 2001
  • 2001-04-04 CN CNB018102859A patent/CN1192144C/zh not_active Expired - Fee Related
  • 2001-04-04 JP JP2002500025A patent/JP4879445B2/ja not_active Expired - Fee Related
  • 2001-04-04 AU AU2001244994A patent/AU2001244994A1/en not_active Abandoned
  • 2001-04-04 DE DE60126079T patent/DE60126079T2/de not_active Expired - Lifetime
  • 2001-04-04 WO PCT/SE2001/000731 patent/WO2001092636A1/fr active IP Right Grant
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