EP0845354B1 - Ink fountain for rotary presses - Google Patents

Ink fountain for rotary presses Download PDF

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Publication number
EP0845354B1
EP0845354B1 EP97117682A EP97117682A EP0845354B1 EP 0845354 B1 EP0845354 B1 EP 0845354B1 EP 97117682 A EP97117682 A EP 97117682A EP 97117682 A EP97117682 A EP 97117682A EP 0845354 B1 EP0845354 B1 EP 0845354B1
Authority
EP
European Patent Office
Prior art keywords
ink
ink fountain
metering
support areas
fountain roller
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
EP97117682A
Other languages
German (de)
French (fr)
Other versions
EP0845354A3 (en
EP0845354A2 (en
Inventor
Bernhard Roskosch
Michael Dr. Voge
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen 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 Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0845354A2 publication Critical patent/EP0845354A2/en
Publication of EP0845354A3 publication Critical patent/EP0845354A3/en
Application granted granted Critical
Publication of EP0845354B1 publication Critical patent/EP0845354B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F31/00Inking arrangements or devices
    • B41F31/02Ducts, containers, supply or metering devices
    • B41F31/04Ducts, containers, supply or metering devices with duct-blades or like metering devices

Definitions

  • the invention relates to an ink fountain for rotary printing presses with a Color metering device, which consists of a large number of closely arranged zone-wide dosing elements, each of which has two support areas and one has between these dosing area, the support areas below Spring pressure of compression springs on an ink fountain roller constantly or indirectly by turning the dosing elements to different dosing ranges
  • Color gap thicknesses are adjustable, according to the preamble of claim 1.
  • each metering element is a metering knife assigned that extends over the length of the metering element. This is intended to be an axial Spreading the color can be achieved according to the dosing range, so that this over the entire zone width is evenly distributed.
  • the Dosing elements under a constant spring pressure which during operation of the machine, d. H. when the ink fountain roller rotates, the metering elements wear out covering foil can lead.
  • the spring pressure is dimensioned so that it through the rotational movement of the ink fountain roller overcomes occurring hydrodynamic pressure and a safe direct or indirect contact of the metering elements on the lateral surface of the Ink fountain roller guaranteed.
  • the object is achieved by a color box with the features of Claim 1 solved.
  • the dosing elements of this color box start in the area the color gap thickness 0 a flattening that runs as a secant and in the area of Ink gap thickness 0 forms a scraping edge.
  • This Scraper edge is achieved that the occurring hydrodynamic pressure significantly is lower and that can be reduced according to the required spring pressure. This minimizes signs of wear on the film and at the same time a significantly lower heat development in the area of the color is achieved.
  • An advantageous embodiment of the invention is characterized in that the Flattening extends over the length of the dosing area. This will help The zero position of a dosing element does not increase the hydrodynamic pressure.
  • a further advantageous embodiment of the invention is characterized in that the support areas directly or indirectly on the ink fountain roller a radius of about 3 mm. Due to this small radius, the wedge effect between Dosing element and lateral surface of the ink fountain roller reduced, so that at the same time the hydrodynamic pressure can be reduced. With this, too Reduce spring pressure and thus wear on the film.
  • the ink fountain 1 consists essentially of a base plate 2 and the Side walls 3 which close off the color space at the end.
  • the ink fountain 1 is one Ink fountain roller 4 assigned that the required amount of ink to the inking unit Rotary press feeds.
  • Above the base plate 2 are next to each other Pressure bars 5 are provided, on which the ink metering device 6 is arranged.
  • the Pressure bars 5 and the ink metering devices 6 are in close succession over the length of the Color box 1 arranged side by side.
  • the pressure bars 5 are supported here Compression springs 7 and are held loose by screws 8.
  • the pressure bars 5 and the Ink metering devices 6 are covered by a film 9 which is contaminated by the ink 10 prevented.
  • the color metering device 6 consists of a large number of closely adjacent one another arranged zone-wide metering elements 11, each via an actuating arm 12, a Handlebar 13 and an adjusting nut 14 can be pivoted.
  • the adjusting nut 14 leaves move in the longitudinal direction via an adjusting screw 15, the drive of the Set screw via an actuator 16 is carried out.
  • each metering element 11 has z. B. two narrow support areas 17, between which an eccentric Dosing area 18 is provided.
  • an eccentric Dosing area 18 is provided.
  • the dosing element 11 is in its Played zero position, d. H. Support area 17 and metering area 18 are located on one level so that there is no color gap. In this position the Color 10 hydrodynamic pressure highest.
  • a flattening 20 is provided in this area, which as a secant under a certain angle ⁇ . This forms on the dosing element 11 in the area the ink gap thickness 0 a wiping edge 21 over which the elastic film 9 is placed.
  • the scraper edge 21 is the color of the outer surface 19 of the Ink fountain roller 4 removed without a high back pressure of the printing ink 10 can. This makes it possible to design the compression spring 7 accordingly, so that the Spring pressure on the metering element 11 and thus against the lateral surface 19 of the Ink fountain roller 4 is reduced.
  • the flattening 20 can extend over the length of the Dosing area 18 extend so that the support areas are circular can. It is also possible to thereby increase the back pressure of the printing ink 10 reduce that the metering element 11 is designed so that the directly or indirectly the ink fountain roller 4 adjacent support areas 17 a radius r of about 3 mm exhibit. This also makes it possible to reduce the jamming angle for the printing ink 10, so that the contact pressure on the lateral surface 19 of the ink fountain roller 4 is reduced and wear of the film 9 or heating can be reduced.

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  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Description

Die Erfindung bezieht sich auf einen Farbkasten für Rotationsdruckmaschinen mit einer Farbdosiereinrichtung, die aus einer Vielzahl von dicht nebeneinander angeordneten zonenbreiten Dosierelementen besteht, von denen jedes zwei Stützbereiche und einen zwischen diesen liegenden Dosierbereich aufweist, wobei die Stützbereiche unter Federdruck von Druckfedern an einer Farbkastenwalze ständig direkt oder indirekt anliegen, und wobei durch Verdrehen der Dosierelemente die Dosierbereiche auf unterschiedliche Farbspaltdicken einstellbar sind, gemäß dem Oberbegriff des Anspruchs 1.The invention relates to an ink fountain for rotary printing presses with a Color metering device, which consists of a large number of closely arranged zone-wide dosing elements, each of which has two support areas and one has between these dosing area, the support areas below Spring pressure of compression springs on an ink fountain roller constantly or indirectly by turning the dosing elements to different dosing ranges Color gap thicknesses are adjustable, according to the preamble of claim 1.

Die DE 29 23 678 C2 zeigt eine derartige Ausgestaltung eines Farbkastens, bei der die Entstehung von farbfreien Streifen auf der Farbkastenwalze aufgrund der ständigen Anlage der Stützbereiche verhindert werden soll. Hierzu ist jedem Dosierelement ein Dosiermesser zugeordnet, das über die Länge des Dosierelements reicht. Hiermit soll ein axiales Ausbreiten der Farbe nach dem Dosierbereich erreicht werden, so daß diese über die gesamte Zonenbreite gleichmäßig verteilt ist. Bei dieser bekannten Lösung stehen die Dosierelemente unter einem konstanten Federdruck, der beim Betrieb der Maschine, d. h. bei einer Drehbewegung der Farbkastenwalze, zu einem Verschleiß der die Dosierelemente abdeckenden Folie führen kann. Der Federdruck ist hierbei so bemessen, daß er den durch die Drehbewegung der Farbkastenwalze auftretenden hydrodynamischen Druck überwindet und eine sichere direkte oder indirekte Anlage der Dosierelemente an der Mantelfläche der Farbkastenwalze gewährleistet.DE 29 23 678 C2 shows such an embodiment of a color box, in which the Formation of color-free stripes on the ink fountain roller due to the constant contact the support areas should be prevented. For this purpose, each metering element is a metering knife assigned that extends over the length of the metering element. This is intended to be an axial Spreading the color can be achieved according to the dosing range, so that this over the entire zone width is evenly distributed. In this known solution, the Dosing elements under a constant spring pressure, which during operation of the machine, d. H. when the ink fountain roller rotates, the metering elements wear out covering foil can lead. The spring pressure is dimensioned so that it through the rotational movement of the ink fountain roller overcomes occurring hydrodynamic pressure and a safe direct or indirect contact of the metering elements on the lateral surface of the Ink fountain roller guaranteed.

In der EP 0 131 106 A2 ist ein nicht der eingangs genannten Gattung zugehöriger Farbkasten beschrieben, dessen als Dosierelemente eingesetzte Rollen in einer Prismenschiene angeordnet sind. Jede der Rollen weist eine durchgehende Schneide auf, die vorzugsweise auf einen minimalen Abstand zu einer Farbkastenwalze gestellt wird, um deren Beschädigung durch die Schneide zu vermeiden.In EP 0 131 106 A2 a genus not belonging to the type mentioned at the beginning is included Color box described, the roles used as dosing elements in one Prism rail are arranged. Each of the rolls has a continuous cutting edge, which is preferably placed at a minimum distance from an ink fountain roller to avoid their damage by the cutting edge.

Ausgehend vom zuerst genannten Stand der Technik (DE 29 23 678 C2) ist es die Aufgabe vorliegender Erfindung, die hydrodynamischen Kräfte bzw. den Federdruck auf die Dosierelemente und damit Verschleiß und Wärmeentwicklung zu verringern.Starting from the first mentioned prior art (DE 29 23 678 C2), it is the task Present invention, the hydrodynamic forces or the spring pressure on the Dosing elements and thus reduce wear and heat development.

Gemäß der Erfindung wird die Aufgabe durch einen Farbkasten mit den Merkmalen des Anspruchs 1 gelöst. Die Dosierelemente dieses Farbkastens weisen beginnend im Bereich der Farbspaltdicke 0 eine Abflachung auf, die als Sekante verläuft und im Bereich der Farbspaltdicke 0 eine Abstreifkante bildet. Mit dieser Abstreifkante wird erreicht, daß der auftretenden hydrodynamische Druck wesentlich geringer ist und daß dem gemäß der benötigte Federdruck reduziert werden kann. Hierdurch lassen sich Verschleißerscheinungen an der Folie minimieren und gleichzeitig wird eine wesentlich geringere Wärmeentwicklung im Bereich der Farbe erreicht.According to the invention, the object is achieved by a color box with the features of Claim 1 solved. The dosing elements of this color box start in the area the color gap thickness 0 a flattening that runs as a secant and in the area of Ink gap thickness 0 forms a scraping edge. With this Scraper edge is achieved that the occurring hydrodynamic pressure significantly is lower and that can be reduced according to the required spring pressure. This minimizes signs of wear on the film and at the same time a significantly lower heat development in the area of the color is achieved.

Eine vorteilhafte Ausgestaltung der Erfindung ist dadurch gekennzeichnet, daß sich die Abflachung über die Länge des Dosierbereichs erstreckt. Hierdurch wird bei Null-Stellung eines Dosierelements der hydrodynamische Druck nicht erhöht.An advantageous embodiment of the invention is characterized in that the Flattening extends over the length of the dosing area. This will help The zero position of a dosing element does not increase the hydrodynamic pressure.

Eine weitere vorteilhafte Ausgestaltung der Erfindung ist dadurch gekennzeichnet, daß die direkt oder indirekt an der Farbkastenwalze anliegenden Stützbereiche einen Radius von etwa 3 mm aufweisen. Durch diesen geringen Radius wird die Keilwirkung zwischen Dosierelement und Mantelfläche der Farbkastenwalze verringert, so daß auch gleichzeitig der hydrodynamische Druck abgebaut werden kann. Auch hiermit läßt sich der Federdruck und somit der Verschleiß an der Folie reduzieren.A further advantageous embodiment of the invention is characterized in that the support areas directly or indirectly on the ink fountain roller a radius of about 3 mm. Due to this small radius, the wedge effect between Dosing element and lateral surface of the ink fountain roller reduced, so that at the same time the hydrodynamic pressure can be reduced. With this, too Reduce spring pressure and thus wear on the film.

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen schematisch dargestellt.An embodiment of the invention is shown schematically in the drawings.

Es zeigt:

Fig. 1
einen Querschnitt durch einen Farbkasten mit Farbkastenwalze,
Fig. 2
einen vergrößerten Ausschnitt der Farbdosiereinrichtung.
It shows:
Fig. 1
a cross section through an ink fountain with ink fountain roller,
Fig. 2
an enlarged section of the color metering device.

Der Farbkasten 1 nach Fig. 1 besteht im wesentlichen aus einer Bodenplatte 2 und den Seitenwänden 3, die den Farbraum stirnseitig abschließen. Der Farbkasten 1 ist einer Farbkastenwalze 4 zugeordnet, die die benötigte Farbmenge dem Farbwerk der Rotationsdruckmaschine zuführt. Oberhalb der Bodenplatte 2 sind nebeneinander Druckleisten 5 vorgesehen, an denen die Farbdosiereinrichtung 6 angeordnet ist. Die Druckleisten 5 und die Farbdosiereinrichtungen 6 sind in dichter Folge über die Länge des Farbkastens 1 nebeneinander angeordnet. Hierbei stützen sich die Druckleisten 5 an Druckfedern 7 ab und werden von Schrauben 8 lose gehalten. Die Druckleisten 5 und die Farbdosiereinrichtungen 6 sind von einer Folie 9 abgedeckt, die ein Verschmutzen durch die Druckfarbe 10 verhindert.1 consists essentially of a base plate 2 and the Side walls 3 which close off the color space at the end. The ink fountain 1 is one Ink fountain roller 4 assigned that the required amount of ink to the inking unit Rotary press feeds. Above the base plate 2 are next to each other Pressure bars 5 are provided, on which the ink metering device 6 is arranged. The Pressure bars 5 and the ink metering devices 6 are in close succession over the length of the Color box 1 arranged side by side. The pressure bars 5 are supported here Compression springs 7 and are held loose by screws 8. The pressure bars 5 and the Ink metering devices 6 are covered by a film 9 which is contaminated by the ink 10 prevented.

Die Farbdosiereinrichtung 6 besteht aus einer Vielzahl von dicht nebeneinander angeordneten zonenbreiten Dosierelementen 11, die jeweils über einen Stellarm 12, einem Lenker 13 und einer Stellmutter 14 verschwenkt werden können. Die Stellmutter 14 läßt sich über eine Stellschraube 15 in Längsrichtung bewegen, wobei der Antrieb der Stellschraube über einen Stellmotor 16 erfolgt.The color metering device 6 consists of a large number of closely adjacent one another arranged zone-wide metering elements 11, each via an actuating arm 12, a Handlebar 13 and an adjusting nut 14 can be pivoted. The adjusting nut 14 leaves move in the longitudinal direction via an adjusting screw 15, the drive of the Set screw via an actuator 16 is carried out.

Jedes Dosierelement 11 weist erfindungsgemäß an seinem Umfang z. B. zwei schmale Stützbereiche 17 auf, zwischen denen ein exzentrisch verlaufender Dosierbereich 18 vorgesehen ist. Durch Verdrehen des Dosierelements 11 im Uhrzeigersinn gemäß Fig. 2, entsteht ein größer werdender Spalt zwischen Stützbereich 17 und Dosierbereich 18, in den sich die elastische Folie einlegt, so daß beim Drehen der Farbkastenwalze 4 auf deren Mantelfläche 19 ein Farbstreifen entsprechender Dicke und Breite entsteht. Über diese Farbspaltdicke läßt sich somit die in das Farbwerk zu transportierende Farbe zonenweise einstellen.According to the invention, each metering element 11 has z. B. two narrow support areas 17, between which an eccentric Dosing area 18 is provided. By rotating the metering element 11 in Clockwise according to Fig. 2, there is an increasing gap between Support area 17 and metering area 18, in which the elastic film is inserted, so that when Rotating the ink fountain roller 4 on its outer surface 19 corresponding to a color strip Thickness and width arise. About this ink gap thickness can thus in the inking unit Adjust the color to be transported zone by zone.

Im gezeigten Ausführungsbeispiel gemäß Fig. 2 ist das Dosierelement 11 in seiner Null-Stellung wiedergegeben, d. h. Stützbereich 17 und Dosierbereich 18 befinden sich auf einer Ebene, so daß kein Farbspalt vorhanden ist. In dieser Stellung ist der hydrodynamische Druck der Farbe 10 am höchsten. Gemäß der vorliegenden Erfindung ist in diesem Bereich eine Abflachung 20 vorgesehen, die als Sekante unter einem bestimmten Winkel α verläuft. Hierdurch bildet sich am Dosierelement 11, im Bereich der Farbspaltdicke 0 eine Abstreifkante 21, über die sich die elastische Folie 9 legt. Durch die Abstreifkante 21 wird die Farbe restlos von der Mantelfläche 19 der Farbkastenwalze 4 entfernt, ohne daß ein hoher Staudruck der Druckfarbe 10 entstehen kann. Hierdurch ist es möglich, die Druckfeder 7 entsprechend auszulegen, so daß der Federdruck auf das Dosierelement 11 und somit gegen die Mantelfläche 19 der Farbkastenwalze 4 verringert wird.In the exemplary embodiment shown in FIG. 2, the dosing element 11 is in its Played zero position, d. H. Support area 17 and metering area 18 are located on one level so that there is no color gap. In this position the Color 10 hydrodynamic pressure highest. According to the present invention a flattening 20 is provided in this area, which as a secant under a certain angle α. This forms on the dosing element 11 in the area the ink gap thickness 0 a wiping edge 21 over which the elastic film 9 is placed. By the scraper edge 21 is the color of the outer surface 19 of the Ink fountain roller 4 removed without a high back pressure of the printing ink 10 can. This makes it possible to design the compression spring 7 accordingly, so that the Spring pressure on the metering element 11 and thus against the lateral surface 19 of the Ink fountain roller 4 is reduced.

Als Ausgestaltungsvariante kann sich die Abflachung 20 über die Länge des Dosierbereichs 18 erstrecken, so daß die Stützbereiche kreisförmig ausgebildet sein können. Weiterhin ist es möglich, den Staudruck der Druckfarbe 10 dadurch zu reduzieren, daß das Dosierelement 11 so ausgebildet wird, daß die direkt oder indirekt an der Farbkastenwalze 4 anliegenden Stützbereiche 17 einen Radius r von etwa 3 mm aufweisen. Auch hierdurch läßt sich der Stauwinkel für die Druckfarbe 10 verringern, so daß der Anstelldruck an die Mantelfläche 19 der Farbkastenwalze 4 vermindert wird und ein Verschleiß der Folie 9 bzw. eine Erwärmung reduziert werden kann. As a design variant, the flattening 20 can extend over the length of the Dosing area 18 extend so that the support areas are circular can. It is also possible to thereby increase the back pressure of the printing ink 10 reduce that the metering element 11 is designed so that the directly or indirectly the ink fountain roller 4 adjacent support areas 17 a radius r of about 3 mm exhibit. This also makes it possible to reduce the jamming angle for the printing ink 10, so that the contact pressure on the lateral surface 19 of the ink fountain roller 4 is reduced and wear of the film 9 or heating can be reduced.

BEZUGSZEICHENLISTEREFERENCE SIGN LIST

11
FarbkastenPaint box
22nd
BodenplatteBase plate
33rd
SeitenwandSide wall
44th
FarbkastenwalzeInk fountain roller
55
DruckleistePressure bar
66
FarbdosiereinrichtungColor metering device
77
DruckfederCompression spring
88th
Schraubescrew
99
Foliefoil
1010th
DruckfarbenPrinting inks
1111
DosierelementDosing element
1212th
StellarmControl arm
1313
LenkerHandlebars
1414
StellmutterAdjusting nut
1515
StellschraubeSet screw
1616
StellmotorServomotor
1717th
StützbereichSupport area
1818th
DosierbereichDosing range
1919th
MantelflächeLateral surface
2020th
AbflachungFlattening
2121
AbstreifkanteScraper edge

Claims (3)

  1. Ink fountain (1) for rotary printing presses, comprising an ink metering device (6) consisting of a plurality of zone-width metering elements (11) arranged in close proximity next to each other and each comprising two support areas (17) and a metering area (18) located therebetween, the support areas (17) being in constant direct or indirect contact with an ink fountain roller (4) due to spring pressure generated by compression springs (7), and the metering areas (18) being adjustable to different ink gap thicknesses by rotating the metering elements (11),
    characterized in
    that, beginning in the region of zero ink gap thickness, the metering elements (11) have a flattened section (20) which extends in the form of a secant and forms a wiper edge (21) in the region of zero ink gap thickness.
  2. Ink fountain according to Claim 1,
    characterized in
    that the flattened section (20) extends over a length of the metering area (18), so that the support areas (17) are circular in shape.
  3. Ink fountain according to Claim 1,
    characterized in
    that the support areas (17) directly or indirectly contacting the ink fountain roller (4) have a radius r of approximately 3 mm.
EP97117682A 1996-11-28 1997-10-13 Ink fountain for rotary presses Expired - Lifetime EP0845354B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19649318A DE19649318A1 (en) 1996-11-28 1996-11-28 Ink fountain for rotary printing machines
DE19649318 1996-11-28

Publications (3)

Publication Number Publication Date
EP0845354A2 EP0845354A2 (en) 1998-06-03
EP0845354A3 EP0845354A3 (en) 1999-02-10
EP0845354B1 true EP0845354B1 (en) 2001-07-11

Family

ID=7813023

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97117682A Expired - Lifetime EP0845354B1 (en) 1996-11-28 1997-10-13 Ink fountain for rotary presses

Country Status (4)

Country Link
US (1) US6012389A (en)
EP (1) EP0845354B1 (en)
JP (1) JP4436465B2 (en)
DE (2) DE19649318A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19914179A1 (en) * 1998-04-23 1999-11-11 Heidelberger Druckmasch Ag Ink dosing device for printing press
DE19826810A1 (en) * 1998-06-16 1999-12-23 Koenig & Bauer Ag Method and device for ink supply
US6802255B2 (en) 2002-12-09 2004-10-12 Color Control Corp. Ink fountain mechanism
US7178461B2 (en) * 2002-12-09 2007-02-20 Color Control Corp. Ink fountain assembly with non-tilt cheeks and liner replacement mechanism
CN102139559A (en) * 2010-02-01 2011-08-03 海德堡印刷机械股份公司 Ink metering device for printing press

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2648098C3 (en) * 1976-10-23 1984-01-05 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Ink box for offset or letterpress machines
DE2923678C2 (en) * 1979-06-12 1982-02-18 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Ink box with individual ink metering devices each extending over the entire zone width
DE3324950C2 (en) * 1983-07-11 1986-04-03 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Ink metering device for a printing machine

Also Published As

Publication number Publication date
EP0845354A3 (en) 1999-02-10
JP4436465B2 (en) 2010-03-24
DE59704007D1 (en) 2001-08-16
EP0845354A2 (en) 1998-06-03
JPH10157074A (en) 1998-06-16
DE19649318A1 (en) 1998-06-04
US6012389A (en) 2000-01-11

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