EP0679472B1 - Machine à meuler des rouleaux - Google Patents

Machine à meuler des rouleaux Download PDF

Info

Publication number
EP0679472B1
EP0679472B1 EP95105553A EP95105553A EP0679472B1 EP 0679472 B1 EP0679472 B1 EP 0679472B1 EP 95105553 A EP95105553 A EP 95105553A EP 95105553 A EP95105553 A EP 95105553A EP 0679472 B1 EP0679472 B1 EP 0679472B1
Authority
EP
European Patent Office
Prior art keywords
guide
grinding
drive
grinding device
roll
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
EP95105553A
Other languages
German (de)
English (en)
Other versions
EP0679472A1 (fr
Inventor
Wolfgang Prof. Dr. Rohde
Dieter Dipl. Ing. Rosenthal
Jürgen Dipl. Ing. Bender
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.)
SMS Siemag AG
Original Assignee
SMS Schloemann Siemag AG
Schloemann Siemag 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 SMS Schloemann Siemag AG, Schloemann Siemag AG filed Critical SMS Schloemann Siemag AG
Publication of EP0679472A1 publication Critical patent/EP0679472A1/fr
Application granted granted Critical
Publication of EP0679472B1 publication Critical patent/EP0679472B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/36Single-purpose machines or devices
    • B24B5/37Single-purpose machines or devices for grinding rolls, e.g. barrel-shaped rolls
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B47/00Drives or gearings; Equipment therefor
    • B24B47/02Drives or gearings; Equipment therefor for performing a reciprocating movement of carriages or work- tables
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/02Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
    • B24B5/04Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces externally

Definitions

  • the invention relates to a grinding device for rolling a Roll stand according to the preamble of claim 1.
  • Such a grinding device is e.g. B. by DE-PS 34 06 160 became known.
  • An abrasive belt is used here, the with an elaborate drive and guide unit grinding roller is brought into contact. These are around endless sanding belt.
  • the disadvantage is that the grinding belt quickly unrolled from a supply roll, and then cumbersome to be wrapped or renewed.
  • Rotatingly driven grinding elements are also known become.
  • the a drive motor is assigned, on a bracket.
  • the Grinding elements are driven such that they over short Oscillate areas along the roller to be ground.
  • flexible electrical leads to the drives are provided be able to compensate for the axial movements.
  • GB-A-535 481 includes an improvement in axially displaceable State-of-the-art support devices for grinding rollers, the one over almost the entire length of the to be ground Has workpiece-extending grinding roller, which over a Slightly adjustable handwheel in the axial direction on a guide is. Use of this device in rolling mills and one Pivotal movement of the device to drives executing the workpiece are not stimulated here.
  • CH-A-298 599 discloses a grinding device based on a Guide along the workpiece is movable.
  • the drive for the Rotational movement of the grinding roller is here on the guide carried, so that this drive motor are always moved must and therefore always in the sphere of influence of the worn Abrasive goods located.
  • EP-A-03 11 820 discloses a pivoting headstock for a grinding wheel, by means of which the grinding wheel to the Workpiece can be pivoted, an axial displacement of the However, grinding wheel along the workpiece is in this grinding device not possible.
  • the invention has for its object a generic Easy, safe and inexpensive to set up the grinding device.
  • the rotatably drivable guide designed as a hollow shaft according to claim 2, as well as the driver projecting into the hollow shaft allow one simple attack of the sliding drive on the grinding element, wherein the spindle nut drive according to claim 4 or 5 a special Maintenance-friendly way shows turns in axial Convert displacement movements.
  • the invention is illustrated by a schematic drawing described.
  • the drawing shows, cut off, parts of the chocks 1, 1 ', of a roll stand in which an interchangeable cassette 2, 2 ', is installed.
  • the exchangeable cassette 2, 2 ' carries the pins 3, 3 ', a rocker 4.
  • An adjusting drive 5 is on the interchangeable cassette 2 supported and works via a gear 6 on the pin 3rd
  • a guide 7 is rotatably mounted in the rocker 4. On the Guide 7 is a grinding element 8, for. B. a sanding mop, non-rotatable, however, axially slidably supported.
  • the guide 7 is is a longitudinally slotted hollow shaft 7 ', which has a toothed belt 9 can be driven by a rotary drive 10.
  • a threaded spindle 11 is mounted in the hollow shaft 7 '.
  • the threaded spindle 11 is via a toothed belt 12 from a displacement drive 13, which is held on the rocker 4, can be driven in rotation.
  • On the threaded spindle is a ball nut 14 mounted, which a driver 15, the hollow shaft 7 'in the area thereof shown slots penetrates, connected to the grinding element 8 is.
  • the grinding device works as follows:
  • the swing arm 4 can be pivoted in this way via the adjusting drive 5 be that the grinding element 8 is placed against the roller 16.
  • the adjusting drive 5 be that the grinding element 8 is placed against the roller 16.
  • the guide 7 and thus the grinding element 8 rotated.
  • the sliding drive drives 13 the threaded spindle 11.
  • the guide 7 and the threaded spindle 11 at the same speed operated, it remains on the driver 15 and the ball nut 14 in operative connection with the threaded spindle 11 Grinding element in the axial rest position.
  • the speed of the threaded spindle 11 compared to the speed of the Guide 7 increases or decreases, the ball nut moves 14 on the threaded spindle 11 and thus shifts that Grinding element 8.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Paper (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Claims (10)

  1. Dispositif de meulage pour les rouleaux d'une cage de laminoir, comportant un guidage (7) s'étendant parallèlement au rouleau à meuler (16), sur lequel est prévu un organe de meulage (8) mobile le long du rouleau (16) au moyen d'un entraínement de déplacement (13), et qui peut être amené en contact contre le rouleau (16) au moyen d'entraínements d'approche (5), caractérisé en ce qu'un entraínement rotatif (10) est associé au guidage (7) et est capable de mettre en rotation le guidage (7) autour de son axe longitudinal, en ce que l'organe de meulage est formé par un élément de meulage (8) à symétrie de révolution et est relié solidairement en rotation au guidage (7), en ce que le guidage (7) est réalisé sous forme d'un arbre creux (7') dans lequel est agencé un écrou (14) qui coopère avec l'élément de meulage (8) via un entraíneur (15) mené à travers une fente dans l'arbre creux (7'), en ce que l'écrou (14) entoure une broche (11), et en ce que la broche (11) peut être mise en rotation par l'entraínement de déplacement (13).
  2. Dispositif de meulage selon la revendication 1, caractérisé en ce que l'écrou est un écrou à recirculation de billes (14) qui coopère avec une broche filetée (11).
  3. Dispositif de meulage selon l'une ou l'autre des revendications 1 et 2, caractérisé en ce qu'un accouplement (18) est prévu entre l'entraínement de déplacement (13) et la broche (11).
  4. Dispositif de meulage selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'il est prévu des détecteurs (17, 17') pour contrôler le mouvement de déplacement de l'élément de meulage (8), et en ce que l'entraínement de déplacement (13) est inversé sur réponse desdits détecteurs (17, 17').
  5. Dispositif de meulage selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la force d'entraínement est transmise tant depuis l'entraínement rotatif (10) que depuis l'entraínement de déplacement (13) via des éléments compensateurs d'oscillations (courroies dentées 9, 12).
  6. Dispositif de meulage selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le guidage (7) peut être amené en contact contre le rouleau à meuler (16).
  7. Dispositif de meulage selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le guidage (7) est agencé entre deux bras d'une bielle (4) attaquée par l'entraínement d'approche (5).
  8. Dispositif de meulage selon la revendication 7, caractérisé en ce que les centres de rotation des bielles (4) sont tenus dans des pièces de montage (1, 1') d'une cage de laminoir, qui portent le rouleau à meuler (16).
  9. Dispositif de meulage selon l'une quelconque des revendications 1 à 8, caractérisé en ce que le dispositif de meulage est prévu dans une unité interchangeable (2, 2'), et en ce qu'il est logé via celle-ci dans la cage de laminoir.
  10. Dispositif de meulage selon l'une quelconque des revendications 1 à 9, caractérisé en ce que le dispositif de meulage est prévu dans une unité interchangeable, et en ce qu'il est logé via celle-ci entre les éléments de montage (1, 1').
EP95105553A 1994-04-28 1995-04-12 Machine à meuler des rouleaux Expired - Lifetime EP0679472B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4414838A DE4414838A1 (de) 1994-04-28 1994-04-28 Walzenschleifmaschine
DE4414838 1994-04-28

Publications (2)

Publication Number Publication Date
EP0679472A1 EP0679472A1 (fr) 1995-11-02
EP0679472B1 true EP0679472B1 (fr) 1998-08-12

Family

ID=6516667

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95105553A Expired - Lifetime EP0679472B1 (fr) 1994-04-28 1995-04-12 Machine à meuler des rouleaux

Country Status (11)

Country Link
US (1) US5830044A (fr)
EP (1) EP0679472B1 (fr)
JP (1) JPH0839402A (fr)
KR (1) KR950031377A (fr)
CN (1) CN1077825C (fr)
AT (1) ATE169541T1 (fr)
CA (1) CA2147920A1 (fr)
DE (2) DE4414838A1 (fr)
ES (1) ES2121249T3 (fr)
FI (1) FI106541B (fr)
TW (1) TW311895B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008054123A1 (de) * 2008-10-31 2010-05-06 Khd Humboldt Wedag Gmbh Rollenpressenschleifmaschine

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010025904A1 (de) * 2010-07-02 2012-01-05 Sms Siemag Ag Poliervorrichtung
CN102107380B (zh) * 2010-12-21 2012-10-17 上海机床厂有限公司 工作台移动式的轧辊磨床工作台支承摆动机构
CN102794704B (zh) * 2011-05-26 2015-03-18 昆山华辰重机有限公司 荒磨机工件旋转驱动系统

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1327919A (en) * 1919-04-08 1920-01-13 Frederick S Klug Roll-polisher
US1854618A (en) * 1930-04-14 1932-04-19 James P Mcgrady Roll polishing machine
US1954716A (en) * 1932-05-06 1934-04-10 Ralph H Stoughton Rolling mill polisher
US1963781A (en) * 1932-05-24 1934-06-19 Wean Engineering Co Inc Roll polisher
GB535481A (en) * 1938-10-31 1941-04-10 Lidkoepings Mek Verkst S Aktie Improvements in axially slidable supporting means for grinding wheels
CH298599A (it) * 1950-02-10 1954-05-15 O M E Officine Meccaniche Elvo Apparecchio per rettificare cilindri di macchine per l'industria tessile.
US3089293A (en) * 1961-10-05 1963-05-14 Cincinnati Milling Machine Co Automatic control mechanism for roll grinder
US3333370A (en) * 1964-11-17 1967-08-01 Farrel Corp Roll grinding method
US3534505A (en) * 1968-06-13 1970-10-20 Litton Industries Inc Reversing mechanism centering device for roll grinders
GB1261071A (en) * 1969-01-27 1972-01-19 Wiggins Teape Res Dev Improvements in or relating to grinding machines
US3660947A (en) * 1971-01-25 1972-05-09 Ingersoll Milling Machine Co Method and apparatus for turning workpieces
US3664066A (en) * 1971-01-25 1972-05-23 Ingersoll Milling Machine Co Method and apparatus for aligning workpieces
US3660948A (en) * 1971-01-25 1972-05-09 Ingersoll Milling Machine Co Method and apparatus for finding the lengthwise center of a workpiece
US4077163A (en) * 1976-07-28 1978-03-07 Usm Corporation Pivot mechanism for grinding wheel infeed
JPS5449700A (en) * 1977-09-26 1979-04-19 Toshiba Mach Co Ltd Cambering attachment of roll grinding machine
JPS59156507A (ja) * 1983-02-25 1984-09-05 Ishikawajima Harima Heavy Ind Co Ltd 圧延ロ−ルの研削装置
CH673802A5 (fr) * 1987-10-14 1990-04-12 Studer Ag Fritz Maschf
DE3840595C1 (fr) * 1988-12-02 1989-10-12 Maschinenfabrik Ernst Thielenhaus Gmbh, 5600 Wuppertal, De
DE3923156A1 (de) * 1989-07-13 1991-01-24 Diskus Werke Frankfurt Main Ag Pinolenzustellung fuer werkzeugmaschinen, insbesondere flachschleifmaschinen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008054123A1 (de) * 2008-10-31 2010-05-06 Khd Humboldt Wedag Gmbh Rollenpressenschleifmaschine

Also Published As

Publication number Publication date
ES2121249T3 (es) 1998-11-16
DE59503113D1 (de) 1998-09-17
DE4414838A1 (de) 1995-11-02
FI951952A (fi) 1995-10-29
FI951952A0 (fi) 1995-04-25
CA2147920A1 (fr) 1995-10-29
US5830044A (en) 1998-11-03
FI106541B (fi) 2001-02-28
CN1077825C (zh) 2002-01-16
TW311895B (fr) 1997-08-01
JPH0839402A (ja) 1996-02-13
CN1115708A (zh) 1996-01-31
ATE169541T1 (de) 1998-08-15
EP0679472A1 (fr) 1995-11-02
KR950031377A (ko) 1995-12-18

Similar Documents

Publication Publication Date Title
EP0743395B1 (fr) Dispositif pour meuler des rails
EP1827755B1 (fr) Dispositif servant a polir des surfaces dures, en particulier des surfaces de verre
DE4226708A1 (de) Bandschleifmaschine
EP0790099B1 (fr) Appareil et procédé pour meuler des garnitures de carde
DE4409300A1 (de) Vorrichtung zum Bearbeiten von Walzen während des Walzvorgangs
EP0679472B1 (fr) Machine à meuler des rouleaux
DE2848872C2 (de) Vorrichtung zur Steuerung der Spannung einer kontinuierlich einer taktweise arbeitenden Maschine zugeführten Materialbahn
DE4308044C1 (de) Längsschneideinrichtung für Bahnen
DE1284082B (de) Vorrichtung zum Aufrauhen eines abgefahrenen Fahrzeugluftreifens
DE19517892C2 (de) Randschleifmaschine für Brillengläser
DE1752659B1 (de) Schleifvorrichtung an einer Schaelmaschine fuer lange,runde Werkstuecke
EP0919333B1 (fr) Appareil de meulage pour rouleaux
EP0503318A1 (fr) Banc d'essai pour roues de véhicules
DE403300C (de) Schleifvorrichtung zum Nachschleifen der Kurbelzapfen an mehrfach gekroepften Kurbelwellen, insbesondere von Automobilmotoren
DE1652073C3 (de) Bandschleifmaschine
DE2365924A1 (de) Schleifeinrichtung fuer karden oder krempel
DE2840299A1 (de) Maschine zum geraderichten von metallischen draehten
DE3105100C2 (de) Maschine zum Schleifen einer Nut in die Umfangsfläche eines unrunden Brillenglases
DE2519630A1 (de) Knaeuelwickelmaschine
DE102009025784A1 (de) Rohrausschleifmaschine mit einstellbarer Seitenführung des Schleifbandes
DE894968C (de) Klarschliff- und/oder Glaettverfahren fuer die Flaechen von gezogenen Glastafeln und Anlage dazu
DE570342C (de) Spitzenlose Schleifmaschine
DE595355C (de) Quereinstellung bei Innenschleifmaschinen
DE1300833B (de) Drahtschleifmaschine
DE3011786A1 (de) Schneidketten-schleifmaschine

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19950503

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE DE ES FR GB GR IT NL SE

17Q First examination report despatched

Effective date: 19961202

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE DE ES FR GB GR IT NL SE

REF Corresponds to:

Ref document number: 169541

Country of ref document: AT

Date of ref document: 19980815

Kind code of ref document: T

REF Corresponds to:

Ref document number: 59503113

Country of ref document: DE

Date of ref document: 19980917

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2121249

Country of ref document: ES

Kind code of ref document: T3

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19981109

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20000313

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20000320

Year of fee payment: 6

Ref country code: NL

Payment date: 20000320

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20000405

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20000418

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GR

Payment date: 20000420

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010412

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010413

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010414

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010430

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010430

BERE Be: lapsed

Owner name: SCHLOEMANN-SIEMAG A.G. SMS

Effective date: 20010430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20011101

EUG Se: european patent has lapsed

Ref document number: 95105553.2

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20010412

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20011101

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20020328

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20020416

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20030331

Year of fee payment: 9

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20030303

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030412

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031231

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041103

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050412