EP1034128B1 - Dispositif de coupe d'une bande continue de papier dans le sens transversal - Google Patents

Dispositif de coupe d'une bande continue de papier dans le sens transversal Download PDF

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Publication number
EP1034128B1
EP1034128B1 EP98959740A EP98959740A EP1034128B1 EP 1034128 B1 EP1034128 B1 EP 1034128B1 EP 98959740 A EP98959740 A EP 98959740A EP 98959740 A EP98959740 A EP 98959740A EP 1034128 B1 EP1034128 B1 EP 1034128B1
Authority
EP
European Patent Office
Prior art keywords
conveyor
paper web
cutting
conveying roller
clamping device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98959740A
Other languages
German (de)
English (en)
Other versions
EP1034128A1 (fr
Inventor
Otto Hartmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Boewe Systec AG
Original Assignee
Boewe Systec AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Boewe Systec AG filed Critical Boewe Systec AG
Publication of EP1034128A1 publication Critical patent/EP1034128A1/fr
Application granted granted Critical
Publication of EP1034128B1 publication Critical patent/EP1034128B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/02—Advancing webs by friction roller
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/30—Arrangements for accumulating surplus web
    • B65H20/32—Arrangements for accumulating surplus web by making loops
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H35/00—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
    • B65H35/04—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers from or with transverse cutters or perforators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/512—Changing form of handled material
    • B65H2301/5121—Bending, buckling, curling, bringing a curvature
    • B65H2301/51212—Bending, buckling, curling, bringing a curvature perpendicularly to the direction of displacement of handled material, e.g. forming a loop
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2403/00—Power transmission; Driving means
    • B65H2403/50—Driving mechanisms
    • B65H2403/51—Cam mechanisms
    • B65H2403/512—Cam mechanisms involving radial plate cam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/14—Roller pairs
    • B65H2404/144—Roller pairs with relative movement of the rollers to / from each other
    • B65H2404/1441—Roller pairs with relative movement of the rollers to / from each other involving controlled actuator
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/202—With product handling means
    • Y10T83/2092—Means to move, guide, or permit free fall or flight of product
    • Y10T83/2094—Means to move product at speed different from work speed
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/444—Tool engages work during dwell of intermittent workfeed
    • Y10T83/4529—With uninterrupted flow of work from supply source
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/444—Tool engages work during dwell of intermittent workfeed
    • Y10T83/4594—Dwell caused by clamping or blocking work during continuous operation of feed means

Definitions

  • the invention relates to a device for cross cutting a paper web according to the preamble of claim 1.
  • Such a device for cross cutting a paper web is from CH-A-633 230 known.
  • the pressure rollers are only for Duration of the cutting process lifted from the paper web, during the rest of the time however, constantly by spring force to the continuously driven conveyor roller pressed second conveyor. So that the stored loop is dismantled and the paper web is stretched again, the conveying speed is the second Conveyor significantly higher than that of the first conveyor.
  • the conveyor rollers of both conveyors rotate different speeds until the set section length is reached During this time, with the paper web stretched, slip must occur between the faster rotating second conveyor roller and the paper web take place since the slower rotating first conveyor roller only with the lower conveyor speed nachternt.
  • the conveyor roller of the second conveyor is as Metal roller formed and the spring force acting on the pressure rollers set relatively low.
  • the maximum possible pulling force of the second Conveyor is limited by the fact that there are none on the paper web May mark pressure points when the mentioned slip occurs and on the other the paper web at the moment of tightening it when the loop is straight degraded, must not tear.
  • the second conveyor also has one here relatively low tensile strength and can therefore the paper web after it from the clamping device is released, not quickly enough from a standstill accelerate. This limits the cutting performance of this known device.
  • the second conveyor in the feed direction the paper web is arranged in front of the clamping device and the latter is immediately in front placed the cutting device.
  • the second conveyor consists of a continuously driven conveyor roller and several to this under Intermittent interposition of the paper web by means of a lifting device pressable pressure rollers.
  • the Cutting device and the lifting device is a common crank drive provided the movements via three crank rods coordinated the aforementioned facilities so that for the duration of the cutting process through the paper web the clamping device clamped and the pressure rollers are lifted off the conveyor roller.
  • the pinch rollers are back to the Pressed conveyor roller of the second conveyor and the paper web through this second conveyor with a compared to the first conveyor speed increased conveying speed, which initially loosened the loop and the paper web is tightened. Afterwards the transport takes place the paper web through the first conveyor and the second conveyor.
  • the pinch rollers of the second conveyor are under spring force pressed the conveyor roller, this fader force is set so weak that when tightened Paper spell slip between the higher one Speed rotating on conveyor roller and the Paper web adjusts.
  • the conveying speed of the Paper web is determined solely by the conveying speed determined the first conveyor. So that the mentioned slip between the conveyor roller the second conveyor and the paper web can adjust, is the second conveyor roller as Metal roller trained.
  • the maximum possible pulling force is limited on the one hand by the fact that in must not mark any marks on the paper web, when the mentioned slip occurs and the other Paper web at the moment of tightening the same, if the loop has just been removed, must not tear.
  • the second conveyor therefore has a proportionate low tensile force and can therefore the paper web, after being released by the clamp is not accelerating quickly enough from that standstill, whereby the cutting performance of this known device is very limited. There is also a risk a paper jam.
  • the pressure rollers must the second conveyor after the Cutting process back to the conveyor roller as quickly as possible be pressed. If at this time the The jaws of the clamping device are not yet complete are open, there is a risk that the paper web gets stuck on the partially open jaws. and a paper jam occurs. That's why they can Only then pressure rollers pressed on the conveyor roller when the full opening of the clamp is ensured. This also leads to a Impaired cutting performance.
  • Another known device for cross cutting a paper web (DE 196 24 277) has a structure similar to that described above Device, with the difference that the second conveyor is arranged between the clamping device and the cutting device, and that with this second conveyor a lifting device for lifting the pinch rollers are missing.
  • the pressure rollers constantly by spring force to the continuously driven Pressed conveyor roller of the second conveyor. Since this in Paper direction is arranged behind the clamping device, the paper web but by the clamping device during the cutting process is clamped, there must be a slip between during the cutting process the second conveyor and the paper web. So this is possible, the conveyor roller of the second conveyor is a metal roller trained and the spring force acting on the pressure rollers is proportional set low.
  • the maximum possible pulling force the second conveyor is limited in that the paper web not be allowed to mark any pressure points if the mentioned slip enters and secondly the paper web at the moment of tightening it, if the loop has just been removed, must not tear.
  • the second Conveying device also has a relatively low traction here on and can therefore the paper web after it from the clamping device released, do not accelerate quickly enough from a standstill.
  • the cutting performance of this known device is one Form length of approximately 9 cm limited to 50,000 cuts per hour.
  • the invention is therefore based on the object of a device for cross cutting a paper web of the type specified in the preamble of claim 1 to show which, above all, a significant increase in cutting performance allows.
  • this new device for cross-cutting one Papiarhahn can the pressure rollers of the second conveyor immediately after the cutting process back to the conveyor roller of the second conveyor be pressed.
  • the First the paper web is at rest through the conveyor roller given a high acceleration.
  • This high acceleration is possible because the surface layer of the Conveyor roller has a high coefficient of friction compared to Paper web and therefore has a great tensile force can transmit this.
  • the acceleration of the paper web can already take place at a time when the clamping device is only partially open because the second conveyor behind the cleat is arranged and therefore through the paper web the clamping device pulls through. The danger of one Paper jams at the clamping device are thus switched off.
  • first conveyor 1 By means of a first conveyor 1 from a driven conveyor roller 1a and one Pinch roller 1b, the paper web P becomes continuous fed to the device for cross cutting.
  • the conveyor roller 1a becomes continuous at a first peripheral speed V1 powered and granted the paper web a conveying speed V1 which e.g. the delivery speed an upstream, not shown Corresponds to the laser printer.
  • V1 e.g. the delivery speed an upstream
  • At the first conveyor can also be a so-called tractor act, consisting of two arranged parallel to each other Conveyor belts with their spikes in perforations engage on both longitudinal edges of the paper web.
  • a loop formation station 3 Following the first conveyor 1 a loop formation station 3 is arranged, their function in the description of the mode of operation the device is explained in more detail.
  • Loop formation station 3 is followed by a clamping device 4, consisting of at least one fixed Jaw 4a and a movable jaw 4b. Between the clamping device 4 and a cutting device 5, a second conveyor 6 is provided.
  • the cutting device 5 is preferably a cutting device with a rotating knife 5a, which with a fixed Knife 5b cooperates. However, it can also be a Cutting device with an up and down movable Knives and a stationary knife may be provided.
  • the second conveyor 6 consists of a continuous driven conveyor roller 6a and several to this with the interposition of the paper web P press rollers 6b.
  • the pressure rollers 6b are spaced apart on a common axis 7 arranged.
  • the conveyor roller 6a has a surface layer or a covering 8 on the opposite the paper web P has the greatest possible coefficient of friction Has.
  • the surface layer 8 preferably consists made of a rubber-elastic material, in particular Polyurethane elastomer based on naphthalene-1,5-diyl diisocyanate (known under the registered trademark Vulkollan).
  • the pinch rollers 6b are intermittent according to the invention to the conveyor roller 6a with interposition the paper web P can be pressed.
  • one Lifting device 9 is provided. This consists of a rotatable cam 10 and a rocker 11 the free end of the axis 7 is arranged.
  • the Swing arm 11 is supported on a support roller 12 the cam disc 10.
  • a spring 13 ensures that the support roller 12 always in contact with the cam 10 is held.
  • the drive of the moving Clamping jaw 4b of the clamping device 4 takes place in a similar manner Way over a cam 14, a rocker 15 and a support roller 16.
  • the cam discs 10 and 14 and the rotating Cutting knives 5a are driven by a common motor 17 applied, whereby the drive of the lifting device 9th and the clamping device 4 in the working cycle of the cutting device 5 is done.
  • a third conveyor 18 provided that suitably adjacent is arranged to the clamping device 4, while the second conveyor 6 adjacent to the cutting device 5 is provided.
  • the third conveyor 18 consists of a continuously driven Conveyor roller 18a and several springs on this pressed pressure rollers 18b.
  • the conveyor roller 18a has a metal surface. The pressing force, with which the pressure rollers 18b with interposition the paper web P pressed against the conveyor roller 18a are selected so that the conveyor roller 18a can continue to rotate even when the paper web is clamped, without leaving pressure marks on the paper web.
  • the two conveyor rollers 6a and 18a become continuous driven at a peripheral speed V2, which is higher than the peripheral speed V1 first conveyor 1.
  • a fourth conveyor 19 also consisting of a continuous driven conveyor roller 19a and more resilient to this with the interposition of the paper web P pressable pressure rollers 19b are provided.
  • the peripheral speed V2 of the conveyor roller 19a corresponds to the Circumferential speed of the conveyor rollers 6a and 18a.
  • the paper web P is at a constant speed from the first conveyor into the invention Transverse cutting device transported. There the paper web is cycled by the clamping device 4 clamped while the cutter 5 performs the cutting process. While the Paper web is clamped by the clamping device 4, is the paper web P by the first conveyor 1 continuously promoted and the funded Amount of paper in loop formation station 3 in Form of a loop 20 stored (buffered). While the paper web clamped by the clamping device 4 , the conveyor roller 18a of the third conveyor rotates 18 grinding on the paper web, however, the pressure rollers 6b of the second conveyor 6 are lifted off the conveyor roller 6a and the latter therefore no promotional effect on the paper web exercises. That separated from the cutting device 5 Paper sheet is through the fourth conveyor 19 transported on.
  • the clamping device 4th solved by the cam 14 and at the same time the pressure rollers 6b on the conveyor roller 6a pressed by the cam 10.
  • the conveyor roller 6a has a high tensile force on the paper web P aue and accelerate the paper web in the shortest possible time Time on an increased conveyor speed that the Circumferential speed V2 of the conveyor roller 6a and also corresponds to the conveyor roller 18. Because the peripheral speed V2 is greater than the conveying speed V1 the first conveyor 1 is the during Clamping the paper web formed paper loop 20th reduced. Just before the paper loop is removed and the paper web is tightened, the pinch rollers 6b can be lifted off the conveyor roller 6a again otherwise the paper web would tear.
  • the timely The pressure rollers 6b are lifted off by appropriate means Design of the cam disc 10.
  • Pinch rollers 6b become the paper web through the third Conveyor 18 and for larger form lengths also transported on by the fourth conveyor 19 until the predetermined form length is reached is.
  • the intermittently effective conveyor roller 6a with a Surface layer 8 with a high coefficient of friction the paper web becomes this in no time given a high acceleration, increasing the duration for dismantling the loop 20, especially for short ones Form lengths that are shortened strongly. this leads to a significant increase in overall performance Contraption.
  • the cams shown in the drawing 10, 14 can also have an externally limited control curve have in the form of a groove in which the Roller 12 or 16 engages from the side. On this way a forced control of the roles 12 or 16 reached up and down and the Spring 13 can be omitted.

Landscapes

  • Advancing Webs (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Details Of Cutting Devices (AREA)

Claims (6)

  1. Dispositif de coupe transversale d'une bande continue de papier (P), comprenant un premier dispositif d'avancement (1) entraíné d'une manière continue, au moyen duquel la bande continue de papier (P) eat déplacée à une première vitesse d'avancement (V1) constante dans le dispositif et est accumulée, c'est-à-dire tamponnée, sous forme d'une boucle (20) dans celui-ci, dans un poste de formation de boucle (3), pendant l'opération de coupe, un dispositif de pincement (4) disposé en aval de celui-ci suivant la direction de passage du papier et servant à un pincement ferme temporaire de la bande continue de papier, un deuxième dispositif d'avancement (6) prévu en aval du dispositif de pincement (4), servant à continuer de déplacer la bande continue de papier, après l'accumulation de celle-ci, à une seconde vitesse d'avancement (V2) accrue vis-à-vis de la première vitesse d'avancement (V1) et constitué d'un rouleau d'avancement (6a), entraíné d'une manière continue, et de plusieurs galets d'application de pression (6b) pouvant être appliqués sous pression d'une manière intermittente sur celui-ci, avec interposition de la bande continue de papier, au moyen d'un dispositif de course (9), et un dispositif de coupe (5) disposé d'une manière fixe en aval du deuxième dispositif d'avancement (6), le dispositif de pincement et le dispositif de course étant entraínés, en synchronisme avec le dispositif de coupe, d'une façon telle que, pendant la durée de l'opération de coupe, la bande continue de papier est pincée fermement par le dispositif de pincement et les galets d'application de pression sont soulevés du rouleau d'avancement, caractérisé en ce que le rouleau d'avancement (6a) du deuxième dispositif d'avancement (6) comporte une couche superficielle (8) en une matière à élasticité du type caoutchouc, c'est-à-dire possédant un coefficient de frottement le plus grand possible vis-à-vis de la bande continue de papier, et en ce que le dispositif de course (9) est agencé ou commandé d'une manière telle que les galets d'application de pression (6b) sont soulevés du rouleau d'avancement (6a) avant que la boucle (20) n'ait disparu et que la bande continue de papier (P) ne soit fortement tendue.
  2. Dispositif suivant la revendication 1, caractérisé en ce que la couche superficielle (8) est constituée d'un élastomère de polyuréthane à base de naphtaline-1,5-diyldiisocyanate.
  3. Dispositif suivant l'une des revendications 1 ou 2, caractérisé en ce que le dispositif de course (9) comprend un mécanisme de came (10 - 12).
  4. Dispositif suivant l'une des revendications 1 à 3, caractérisé en ce qu'il est prévu, disposé entre le dispositif de pincement (4) et le dispositif de coupe (5), un troisième dispositif d'avancement (18) qui est constitué d'un rouleau d'avancement (18a), pouvant être entraíné d'une manière continue, et de plusieurs galets d'application de pression (18b) appliqués sous pression sur celui-ci d'une manière élastique, ce rouleau d'avancement (18a) étant entraíné à la même vitesse périphérique (V2) que le rouleau d'entraínement (6a) du deuxième dispositif d'avancement (6).
  5. Dispositif suivant la revendication 4, caractérisé en ce que le deuxième dispositif d'avancement (6) est disposé au voisinage du dispositif de coupe (5) et le troisième dispositif d'avancement (18) au voisinage du dispositif de pincement (4).
  6. Dispositif suivant la revendication 4 ou 5, caractérisé en ce que le rouleau d'avancement (18a) du troisième dispositif d'avancement (18) comporte une surface métallique.
EP98959740A 1997-11-05 1998-10-13 Dispositif de coupe d'une bande continue de papier dans le sens transversal Expired - Lifetime EP1034128B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19748789A DE19748789C2 (de) 1997-11-05 1997-11-05 Vorrichtung zum Querschneiden einer Papierbahn
DE19748789 1997-11-05
PCT/DE1998/003060 WO1999024343A1 (fr) 1997-11-05 1998-10-13 Dispositif de coupe d'une bande continue de papier dans le sens transversal

Publications (2)

Publication Number Publication Date
EP1034128A1 EP1034128A1 (fr) 2000-09-13
EP1034128B1 true EP1034128B1 (fr) 2002-01-23

Family

ID=7847642

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98959740A Expired - Lifetime EP1034128B1 (fr) 1997-11-05 1998-10-13 Dispositif de coupe d'une bande continue de papier dans le sens transversal

Country Status (7)

Country Link
US (1) US6418825B1 (fr)
EP (1) EP1034128B1 (fr)
JP (1) JP2001522768A (fr)
CA (1) CA2309106A1 (fr)
DE (2) DE19748789C2 (fr)
ES (1) ES2170541T3 (fr)
WO (1) WO1999024343A1 (fr)

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EP2485974B1 (fr) * 2009-10-06 2015-11-25 Kern AG Dispositif pour couper des bandes de papier
JP5553666B2 (ja) * 2010-04-06 2014-07-16 キヤノン株式会社 シート切断装置およびシート切断方法
JP5836194B2 (ja) * 2012-05-21 2015-12-24 ユニ・チャーム株式会社 トウを含む複数の繊維を有する連続ウエブの切断装置、及び切断方法
JP5656915B2 (ja) * 2012-05-21 2015-01-21 ユニ・チャーム株式会社 トウを含む複数の繊維を有するウエブ部材の切断装置、及び切断方法
JP5871711B2 (ja) * 2012-05-21 2016-03-01 ユニ・チャーム株式会社 トウを含む複数の繊維を有するウエブ部材の切断装置、及び切断方法
US11090896B2 (en) 2012-10-12 2021-08-17 Heidelberger Druckmaschinen Ag Web insertion device for a flat-bed die-cutting machine, manufacturing system for packages and method for feeding a web of printing material
DE102012019992A1 (de) * 2012-10-12 2014-04-17 Gallus Stanz- Und Druckmaschinen Gmbh Vorrichtung für eine Flachbettstanze und Verfahren zum Zuführen einer Bedruckstoffbahn
CN103395651B (zh) * 2013-08-01 2016-06-29 晋江市海纳机械股份有限公司 一种软抽纸分切装置
CN112338968A (zh) * 2020-04-12 2021-02-09 福州杰阳科技有限公司 一种造纸用纸张切边装置
CN112722913A (zh) * 2020-12-18 2021-04-30 安徽本色印刷有限公司 一种印刷纸张用分切装置
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CA2309106A1 (fr) 1999-05-20
ES2170541T3 (es) 2002-08-01
DE19748789A1 (de) 1999-05-06
DE19748789C2 (de) 2000-05-25
JP2001522768A (ja) 2001-11-20
EP1034128A1 (fr) 2000-09-13
WO1999024343A1 (fr) 1999-05-20
US6418825B1 (en) 2002-07-16
DE59802924D1 (de) 2002-03-14

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