EP1040918B1 - Verfahren und Vorrichtung zur Tilgung der Drehschwingungen einer Druckmaschine - Google Patents
Verfahren und Vorrichtung zur Tilgung der Drehschwingungen einer Druckmaschine Download PDFInfo
- Publication number
- EP1040918B1 EP1040918B1 EP00104762A EP00104762A EP1040918B1 EP 1040918 B1 EP1040918 B1 EP 1040918B1 EP 00104762 A EP00104762 A EP 00104762A EP 00104762 A EP00104762 A EP 00104762A EP 1040918 B1 EP1040918 B1 EP 1040918B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- torsional vibration
- printing machine
- mass
- machine according
- damping
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F13/00—Common details of rotary presses or machines
- B41F13/008—Mechanical features of drives, e.g. gears, clutches
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
- B41P2213/00—Arrangements for actuating or driving printing presses; Auxiliary devices or processes
- B41P2213/40—Auxiliary devices or processes associated with the drives
- B41P2213/42—Vibration-dampers for machine parts
Definitions
- the invention relates to a method and a device for the eradication of the torsional vibrations a printing press, wherein at least one torsional vibration absorbing Element acts on the gear train of the printing press.
- Sources of vibration are cylinder channels as well Sheet transfer elements and other discontinuously working machine elements. This leads to bending vibrations in rollers and cylinders, but also to Torsional vibrations of cylinders or drums. The latter usually sit over the Gears of the gear train continue and usually reach with increasing Distance from the drive higher amplitudes. Such vibrations can be angularly synchronous or occur asynchronously.
- the invention is therefore based on the problem of speed-dependent duplication problems reduce as much as possible.
- the object is achieved in a method of the type mentioned in that the first mode shape and natural frequency of a printing machine is determined and that at least one of the shaft journals of the gears, on which the greatest amplitudes occur at the first natural frequency, one on the reductions of this first natural frequency coordinated passive torsional vibration damper is assigned.
- the object is achieved in a device of the type mentioned in that on at least one shaft journal of the cylinders driven by the gear train or drum a passive torsional vibration damper near the gear is arranged.
- the method according to the invention essentially causes the duplication problems specifically determined and with simple and effective means spatially and fought at the time of their appearance. Determining the first and where appropriate Further eigenmodes take place, for example, by measuring torsional vibrations and / or Calculation. The vibrations are in their resonance ranges, i.e. when they occur counteracted the eigenmodes and natural frequencies of the printing machine in such a way that they are harmless to the printing process and therefore no duplication errors occur can. This is done by appropriate tuning of the natural frequency of the Mass of the torsional vibration damper, its spring rate and, if applicable, its Damping, as well as by the arrangement of the torsional vibration damper on the critical Set the gear train.
- the device according to the invention provides the design and arrangement of a torsional vibration damper before the above To achieve effect.
- the Placement near the gear ensures that the harmful vibration is eliminated before it affects the cylinder or drum.
- the method and the device reduce the vibration in one Frequency band around the first natural frequency along the entire drive train of the Press. It unfolds without any technical control effort and without Sensors and actuators have an optimal effect at every set printing speed. This means that there are no changes in quality that depend on the printing speed due to vibrations in the drive train.
- a further development of the method provides that the second mode and Natural frequency of a printing press can be measured and that at least the shaft journal of the gears on which the greatest amplitudes of the second natural frequency occur, a passive tuned to the reduction of this second natural frequency Torsional vibration damper is assigned. This also reduces vibrations in a frequency band around the second natural frequency along the entire Drive train of the printing press.
- a passive tuned to the reduction of this second natural frequency Torsional vibration damper is assigned. This also reduces vibrations in a frequency band around the second natural frequency along the entire Drive train of the printing press.
- other orders of natural frequencies can also be combated, as a rule it is sufficient, however, the first and the second natural frequency in the proposed manner and Way to reduce.
- the properties of the torsional vibration absorbers are preferably corresponding to the measured values selected such that eradication and damping of the torsional vibrations is achieved.
- the device according to the invention provides for the eradication of the torsional vibrations that torsional vibration absorbers can be arranged at any point on the gear train can. However, it is preferably provided that at the points on the gear train Torsional vibration dampers are arranged on which the largest torsional vibration amplitudes occur. Since the amplitudes with increasing distance from the drive in the As a rule, it is advisable that the torsional vibration damper be attached to the Shafts of the cylinders or drums are arranged which continue from the drive are removed. For a machine with several printing units and a drive in Area of the machine center, it is suggested that each power transmission side at least a torsional vibration damper is assigned.
- At least one torsional vibration damper is expediently used to reduce the first frequency arranged and dimensioned.
- An optimal one Vibration reduction is achieved in that the torsional vibration damper dampened absorber.
- Such absorbers have a mass, which by means of spring and Damping elements is articulated at the critical points of the drive train.
- the damped absorber consists of at least one mass and at least one elastomer that exists between a carrier and the mass is inserted, the elastomer having spring and damping properties.
- a second embodiment provides that the damped absorber consists of at least one Mass and spring elements and damping elements exist between the Mass and a carrier are arranged.
- the damping elements expediently arranged acting in the circumferential direction.
- the damping elements can be cylinders with pistons, a damping medium can flow through a gap on the piston.
- the spring elements are also useful arranged acting in the circumferential direction.
- Further training provides for the reduction of the first and second mode and Natural frequency of the press a torsional vibration damper as a two-stage torsional vibration damper train.
- the first resilient and damping elements are arranged between the carrier and the mass and that second resilient and damping elements between the mass and another Mass are arranged, one of the resilient and damping elements with the associated mass to reduce the first and the other resilient and damping Element with the associated mass to reduce the second eigenmode and Natural frequency is formed and dimensioned.
- the damped torsional vibration dampers to combat the first and second Natural frequency can be arranged independently of each other on the cylinder journal. It it is also possible to arrange both absorbers next to each other on the same flange and to assign such a double damper to a cylinder or a drum.
- the printing press 1 shows a printing press 1 with the torsional vibration damping according to the invention.
- the printing press 1 consists of five printing units 7, 7 ', 7 ", 7" “, 7” ", which are driven by a drive 8 via a gear train 2.
- the number of Printing units are of course only exemplary.
- the drive 8 is expedient arranged in the central region of the printing press 1 in order to transfer the data to be transferred To keep moments of force as low as possible.
- Each printing unit 7, 7 ', 7' ', 7' ', 7''', 7 ''''' is one Assigned printing cylinder 4 and there are drums 4 'between the printing units for transferring the sheets from one printing unit to another.
- the cylinders 4 and the drums 4 ' are equipped with gears 6, 6', 6 '', ... which pull the gears 2 forming interlocking. If there are 1 torsional vibrations in such a printing press, so these are usually low in the drive 8 and increase with increasing distance from the drive 8.
- the first of such a printing press 1 is measured by torsional vibration and possibly also the second mode and frequency as well as the location of the Occurrence of the same is determined in order to target this natural frequency and Use inherent shape of coordinated passive torsional vibration absorbers 5, 5 '.
- With such a Machine with the drive 8 in the middle area should regularly every power transmission side 9 and 9 'are assigned at least one torsional vibration damper 5, 5'.
- Fig. 2 shows the arrangement of a first embodiment of a torsional vibration damper 5 or 5 '.
- a cylinder 4 or a drum 4 ' is shown, which is mounted on both sides in the side walls 19 of the printing press by means of bearings 20.
- the side wall 19 of the drive side is shown.
- the gear 6, 6 ', 6'', ..., which is driven via the gear train 2 of the printing press 1, is located on the shaft journal 3 on this side. If corresponding amplitudes of the natural frequency have been measured for this cylinder 4 or this drum 4 ', the shaft journal 3 is provided according to the invention with a torsional vibration damper 5 or 5'.
- the illustrated first exemplary embodiment of a torsional vibration damper 5, 5 ' exists from a carrier 14, for example a flange, which is attached to the shaft journal 3 is.
- a carrier 14 On this carrier 14 there is an elastomer 11, which is a ring trained mass 10 carries.
- the elastomer 11 is designed such that it is amortization and Has damping properties.
- Fig. 3 shows a second embodiment of a torsional vibration damper 5, 5 '.
- the repayment properties are achieved by means of specific spring elements 12 and the damping properties are achieved by means of specific damping elements 13.
- these are arranged between a flange-like carrier 14 and the mass 10.
- the damping elements 13 consist of closed cylinders 15 in which pistons 16 run, the pistons 16 having a gap 18 through which a damping medium 17 can flow from one space to another.
- FIG. 4 shows a first exemplary embodiment of a two-stage torsional vibration damper 21.
- a carrier 14 with an elastomer 11 and a mass 10 is arranged on a shaft journal 3.
- a vibration which has amplitudes of the first and second orders can be reduced with a two-stage torsional vibration damper 21.
- FIG. 5 shows a second exemplary embodiment of a two-stage torsional vibration damper 21.
- the two torsional vibration dampers 5 and 5 ' are arranged next to one another on a carrier 14.
- the invention can be implemented with many other embodiments, for example the two-stage torsional vibration damper of FIGS. 4 and 5 in Art are formed like the torsional vibration damper 5, 5 ', which is shown in Fig. 3 and was explained above.
- torsional vibration damper 5 for the first and torsional vibration damper 5 'for the second mode shape and frequency of the pressure arrange the machine separately on the shaft journal 3. They can partially open the same shaft journal 3 or on different shaft journals 3.
- Further embodiments of the damping 13 and spring elements 12 are also conceivable or an embodiment in which a mass 10 or 10 'disc-shaped under Insertion of a repaying and / or damping element 11, 1 ', 12, 13 on the end face of the shaft journal 3 sits.
Description
- Fig. 1
- Eine Druckmaschine mit der erfindungsgemäßen Drehschwingungstilgung,
- Fig. 2
- die Anordnung eines ersten Ausführungsbeispiels eines Drehschwingungstilgers,
- Fig. 3
- ein zweites Ausführungsbeispiel eines Drehschwingungstilgers,
- Fig. 4
- ein erstes Ausführungsbeispiel eines zweistufiges Drehschwingungstilgers und
- Fig. 5
- ein zweites Ausführungsbeispiel eines zweistufigen Drehschwingungstilgers.
- 1
- Druckmaschine
- 2
- Zahnräderzug
- 3
- Wellenzapfen
- 4, 4'
- Zylinder oder Trommel (4 Druckzylinder, 4' Umführtrommel)
- 5, 5'
- Drehschwingungstilger (5 für erste und 5' für zweite Eigenform und Eigenfrequenz einer Druckmaschine)
- 6, 6', 6'',...
- Zahnräder
- 7, 7', 7'', 7''', 7''''
- Druckwerk
- 8
- Antrieb
- 9, 9'
- Kraftübertragungsseite
- 10
- Masse
- 10'
- weitere Masse
- 11
- Elastomer
- 11'
- weiteres Elastomer
- 12
- Federelement
- 13
- Dämpfungselement
- 14
- Träger (Flansch)
- 15
- Zylinder
- 16
- Kolben
- 17
- Dämpfungsmedium
- 18
- Spalt
- 19
- Seitenwand
- 20
- Lager
- 21
- zweistufiger Drehschwingungstilger
Claims (16)
- Verfahren zur Tilgung der Drehschwingungen einer Druckmaschine (1), wobei mindestens ein drehschwingungsaufnehmendes Element auf den Zahnräderzug (2) der Druckmaschine (1) wirkt,
dadurch gekennzeichnet, daß die erste Eigenform und Eigenfrequenz einer Druckmaschine ermittelt wird und daß mindestens einem der Wellenzapfen (3) der Zahnräder (6, 6', 6'', ...), an denen die größten Amplituden der ersten Eigenfrequenz auftreten, ein auf die Reduzierungen dieser ersten Eigenfrequenz abgestimmter passiver Drehschwingungstilger (5, 21) zugeordnet wird. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet, daß auch die zweite Eigenform und Eigenfrequenz einer Druckmaschine gemessen werden und daß mindestens einem der Wellenzapfen (3) der Zahnräder (6, 6', 6'' ...), an denen die größten Amplituden der zweiten Eigenfrequenz auftreten, ein auf die Reduzierung dieser zweiten Eigenfrequenz abgestimmter passiver Drehschwingungstilger (5') zugeordnet wird. - Verfahren nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß die Eigenschaften der Drehschwingungstilger (5, 5', 21) entsprechend der gemessenen Werte derart gewählt werden, daß eine Tilgung und eine Dämpfung der Drehschwingungen erzielt wird. - Druckmaschine mit einer Vorrichtung zur Tilgung der Drehschwingungen, wobei mindestens ein schwingungsaufnehmendes Element auf den Zahnräderzug (2) der Druckmaschine (1) wirkt,
dadurch gekennzeichnet, daß auf mindestens einem Wellenzapfen (3) der durch den Zahnräderzug (2) angetriebenen Zylinder oder Trommeln (4, 4') ein passiver Drehschwingungstilger (5, 5', 21) in der Nähe des Zahnrades (6, 6', 6'', ...) angeordnet ist, welcher auf die ermittelte erste Eigenfrequenz abgestimmt ist. - Druckmaschine nach Anspruch 4,
dadurch gekennzeichnet, daß an den Stellen des Zahnräderzuges (2) Drehschwingungstilger (5, 5', 21) angeordnet sind, an denen die größten Drehschwingungsamplituden auftreten. - Druckmaschine nach Anspruch 4 oder 5,
dadurch gekennzeichnet, daß bei einer Maschine mit mehreren Druckwerken (7, 7', 7'', ...) und einem Antrieb (8) im Bereich der Maschinenmitte jeder Kraftübertragungsseite (9, 9') mindestens ein Drehschwingungstilger (5, 5', 21) zugeordnet ist. - Druckmaschine nach einem der Ansprüche 4 bis 6,
dadurch gekennzeichnet, daß der mindestens eine Drehschwingungstilger (5) zur Reduzierung der ersten Eigenfrequenz angeordnet und bemessen ist. - Druckmaschine nach Anspruch 7,
dadurch gekennzeichnet, daß mindestens ein weiterer Drehschwingungstilger (5') zur Reduzierung der zweiten Eigenfrequenz angeordnet und bemessen ist. - Druckmaschine nach einem der Ansprüche 4 bis 9,
dadurch gekennzeichnet, daß der Drehschwingungstilger (5, 5', 21) ein gedämpfter Tilger ist. - Druckmaschine nach Anspruch 9,
dadurch gekennzeichnet, daß der gedämpfte Drehschwingungstilger (5, 5', 21) aus mindestens einer Masse (10, 10') und mindestens einem Elastomer (11, 11') besteht, das zwischen einem Träger (12) und der Masse (10, 10') eingefügt ist, wobei das Elastomer (11, 11') Feder- und Dämpfungseigenschaften aufweist. - Druckmaschine nach Anspruch 9,
dadurch gekennzeichnet, daß der gedämpfte Tilger (5, 5', 21) aus mindestens einer Masse (10, 10') und Federelementen (12) sowie Dämpfungselementen (13) besteht, die zwischen der Masse (10, 10') und einem Träger (14) angeordnet sind. - Druckmaschine nach Anspruch 11,
dadurch gekennzeichnet, daß die Dämpfungselemente (13) in Umfangsrichtung wirkend angeordnet sind. - Druckmaschine nach Anspruch 12,
dadurch gekennzeichnet, daß die Dämpfungselemente (13) Zylinder (15) mit Kolben (16) sind, wobei ein Dämpfungsmedium (17) durch einen Spalt (18) am Kolben (16) fließen kann. - Druckmaschine nach einem der Ansprüche 11 bis 13,
dadurch gekennzeichnet, daß die Federelemente (12) in Umfangsrichtung wirkend angeordnet sind. - Druckmaschine nach einem der Ansprüche 4 bis 14,
dadurch gekennzeichnet, daß die Drehschwingungstilger (5, 5') zur Reduzierung der ersten und zweiten Eigenform und Eigenfrequenz der Druckmaschine als zweistufige Drehschwingungstilger (21) ausgebildet sind. - Druckmaschine nach Anspruch 16,
dadurch gekennzeichnet, daß erste federnde und dämpfende Elemente (11, 12, 13) zwischen dem Träger (14) und der Masse (10) angeordnet sind und daß zweite federnde und dämpfende Elemente (11', 12, 13) zwischen der Masse (10) und einer weiteren Masse (10') angeordnet sind, wobei eines der federnden und dämpfenden Elemente (11, 12, 13, 11') mit der zugehörigen Masse (10, 10') zur Reduzierung der ersten und das andere federnde und dämpfende Element (11, 12, 13; 11') mit der zugehörigen Masse (10; 10') zur Reduzierung der zweiten Eigenform und Eigenfrequenz ausgebildet und bemessen ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19914613A DE19914613A1 (de) | 1999-03-31 | 1999-03-31 | Verfahren und Vorrichtung zur Tilgung der Drehschwingungen einer Druckmaschine |
DE19914613 | 1999-03-31 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1040918A1 EP1040918A1 (de) | 2000-10-04 |
EP1040918B1 true EP1040918B1 (de) | 2004-07-14 |
EP1040918B2 EP1040918B2 (de) | 2012-01-25 |
Family
ID=7903081
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00104762A Expired - Lifetime EP1040918B2 (de) | 1999-03-31 | 2000-03-04 | Verfahren und Vorrichtung zur Tilgung der Drehschwingungen einer Druckmaschine |
Country Status (5)
Country | Link |
---|---|
US (1) | US6499401B1 (de) |
EP (1) | EP1040918B2 (de) |
JP (1) | JP2000313099A (de) |
AT (1) | ATE270967T1 (de) |
DE (2) | DE19914613A1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19963945C1 (de) * | 1999-12-31 | 2001-07-19 | Koenig & Bauer Ag | Verfahren und Anordnung zur Kompensation von Schwingungen rotierender Bauteile |
DE10249475A1 (de) | 2001-11-20 | 2003-09-11 | Heidelberger Druckmasch Ag | Verfahren und Vorrichtung zum Unterdrücken von Schwingungen in einer drucktechnischen Maschine |
DE10248519B4 (de) * | 2002-10-17 | 2006-11-02 | Voith Patent Gmbh | Mittelwalze eines Kalanders und Kalander |
DE102007015345A1 (de) * | 2007-03-30 | 2008-10-02 | Koenig & Bauer Aktiengesellschaft | Vorrichtung zur Reduzierung von Schwingungen einer Greiferwelle |
DE102008054192A1 (de) * | 2008-10-31 | 2010-05-06 | Manroland Ag | Druckeinheit |
DE102009046745A1 (de) * | 2009-11-17 | 2011-05-19 | Man Diesel & Turbo Se | Kurbelwelle |
DE102010026204A1 (de) * | 2010-07-02 | 2012-01-05 | Fakultät Ingenieurwissenschaften und Informatik Fachhochschule Onsabrück | Verfahren sowie Vorrichtung zur Kompensation von über den Umfang eines rotierenden insbesondere zylindrischen, Bauteils, insbesondere einer Walze, periodisch wiederkehrenden Störanregungen sowie Verfahren zur Bestimmung der Oberflächenstruktur eines ringförmigen Profils zur Kompensation der Störanregungen |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0585897A1 (de) * | 1992-09-02 | 1994-03-09 | Konica Corporation | Antriebsvorrichtung für einen rotierenden Körper in einem Bilderzeugungsgerät |
Family Cites Families (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE130321C (de) | ||||
US2581656A (en) * | 1947-04-25 | 1952-01-08 | Hoe & Co R | Bearing support for printing presses |
US3058371A (en) * | 1960-11-29 | 1962-10-16 | Fred L Haushalter | Vibration dampener |
DE2447602C3 (de) * | 1974-10-05 | 1980-10-30 | M.A.N.-Roland Druckmaschinen Ag, 6050 Offenbach | Dämpfungsvorrichtung |
US4073047A (en) * | 1974-12-26 | 1978-02-14 | The Goodyear Tire & Rubber Company | Method of making vibration damper |
DE2516462C3 (de) * | 1975-04-15 | 1981-01-08 | M.A.N.-Roland Druckmaschinen Ag, 6050 Offenbach | Gleichstromantrieb für Druckmaschinen |
DD130321A1 (de) * | 1977-04-12 | 1978-03-22 | Wolfgang Mey | Vorrichtung zur tilgung von torsionsschwingungen |
DE2907016C2 (de) * | 1979-02-23 | 1982-12-09 | Goetze Ag, 5093 Burscheid | Schwingungstilger für rotierende Wellen |
DE3502029A1 (de) * | 1985-01-23 | 1986-07-31 | Fichtel & Sachs Ag, 8720 Schweinfurt | Torsionsdaempfer fuer kupplungsscheiben mit hydraulischer daempfung |
DE3529687A1 (de) * | 1985-08-20 | 1987-03-05 | Opel Adam Ag | Drehschwingungstilger fuer eine antriebswelle |
DE3626185A1 (de) * | 1986-08-01 | 1988-02-18 | Heidelberger Druckmasch Ag | Getriebe zur bildung einer zyklisch ablaufenden bewegung aus einer rotationsbewegung |
DE3828638C1 (de) * | 1988-08-24 | 1989-07-27 | Heidelberger Druckmaschinen Ag, 6900 Heidelberg, De | |
JPH02146029U (de) * | 1989-05-15 | 1990-12-11 | ||
JP2895268B2 (ja) * | 1990-08-13 | 1999-05-24 | オイレス工業株式会社 | 塑性エネルギー吸収装置 |
DE4033278C1 (de) * | 1990-10-19 | 1992-03-12 | Heidelberger Druckmaschinen Ag, 6900 Heidelberg, De | |
EP0523255B1 (de) * | 1991-02-05 | 1996-06-05 | Kabushiki Kaisha Yaskawa Denki | Verfahren zur unterdrückung von torsionsschwingungen in einer motorgeschwindigkeitsregelung und vorrichtung dafür |
DE4234928A1 (de) * | 1992-10-16 | 1994-04-21 | Heidelberger Druckmasch Ag | Vorrichtung und Verfahren zur Dämpfung von mechanischen Schwingungen von Druckmaschinen |
US5324248A (en) * | 1992-11-03 | 1994-06-28 | Composite Development Corporation | Composite machine roll and method of manufacture |
FR2723625B1 (fr) * | 1994-08-09 | 1996-11-08 | Heidelberg Harris Sa | Procede et dispositif d'amortissement des vibrations en flexion des cylindres dans une presse a imprimer. |
DE19508082C2 (de) † | 1995-03-08 | 2000-05-11 | Koenig & Bauer Ag | Hauptantrieb für eine Druckmaschine |
US5752443A (en) | 1995-06-16 | 1998-05-19 | Heidelberger Druckmaschinen Ag | Mechanism for excluding critical speeds from normal operating ranges |
JP3742143B2 (ja) * | 1996-04-19 | 2006-02-01 | 株式会社三共製作所 | 変動トルク相殺装置 |
US5794529A (en) | 1996-05-02 | 1998-08-18 | Heidelberger Druckmaschinen Ag | Compliant drive for printing presses |
-
1999
- 1999-03-31 DE DE19914613A patent/DE19914613A1/de not_active Ceased
-
2000
- 2000-03-04 DE DE50007037T patent/DE50007037D1/de not_active Expired - Lifetime
- 2000-03-04 EP EP00104762A patent/EP1040918B2/de not_active Expired - Lifetime
- 2000-03-04 AT AT00104762T patent/ATE270967T1/de not_active IP Right Cessation
- 2000-03-30 JP JP2000094016A patent/JP2000313099A/ja active Pending
- 2000-03-31 US US09/540,936 patent/US6499401B1/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0585897A1 (de) * | 1992-09-02 | 1994-03-09 | Konica Corporation | Antriebsvorrichtung für einen rotierenden Körper in einem Bilderzeugungsgerät |
Also Published As
Publication number | Publication date |
---|---|
EP1040918B2 (de) | 2012-01-25 |
ATE270967T1 (de) | 2004-07-15 |
US6499401B1 (en) | 2002-12-31 |
JP2000313099A (ja) | 2000-11-14 |
DE50007037D1 (de) | 2004-08-19 |
DE19914613A1 (de) | 2000-10-05 |
EP1040918A1 (de) | 2000-10-04 |
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