EP0259636A2 - Device for detecting defects - Google Patents

Device for detecting defects Download PDF

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Publication number
EP0259636A2
EP0259636A2 EP87111629A EP87111629A EP0259636A2 EP 0259636 A2 EP0259636 A2 EP 0259636A2 EP 87111629 A EP87111629 A EP 87111629A EP 87111629 A EP87111629 A EP 87111629A EP 0259636 A2 EP0259636 A2 EP 0259636A2
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EP
European Patent Office
Prior art keywords
control unit
controlled
machine
printing
sensors
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Granted
Application number
EP87111629A
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German (de)
French (fr)
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EP0259636B1 (en
EP0259636A3 (en
Inventor
Claus Dipl.-Ing. Simeth
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Manroland AG
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MAN Roland Druckmaschinen AG
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Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Priority to AT87111629T priority Critical patent/ATE63857T1/en
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Publication of EP0259636A3 publication Critical patent/EP0259636A3/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices

Definitions

  • the invention relates to a device on a printing press, the function and operating state of which can be checked by sensors arranged at different points, wherein the achievement of certain measured values can be used to display or initiate control processes.
  • DE-OS 2 430 212 and DE-PS 3 034 212 it is known to record, for example, the print quality of the processed sheets by means of a density measuring device and to mark or discard sheets of inferior quality.
  • the invention has for its object to detect pressure problems that occur, which lead above all to duplication, by measurement.
  • the measured values obtained can be processed for automatic control of the machine, for information display for the printer and for machine protection. If a doubling is indicated by the fact that the peeling noises of the sheet come into a critical zone, commands can be triggered in order to change the rheological properties of the printing ink used, such as the color consistency.
  • the temperature of the tempering agent flowing through the ink rubbers can be changed, but the time for the blanket washing can also be brought forward or the washing interval can be changed. In extreme cases, the machine can be stopped if there are no tearing noises, that is to say because of a false sheet, or if there is a particular increase in the amount of noise.
  • the invention also makes use of the knowledge that the cause of the doubling or a changed sporadically occurring tearing behavior of the printing carrier web or a sheet from the blanket cylinder is a result of any mechanical unrest in the press. At some point the machine goes for a short time, for example on a cylinder or in the web guide, the uniformity is lost, so that the errors mentioned above occur. Based on this knowledge, it was also found that the loss of uniformity in the printing process or in the machine brings about a change in the sound frequency spectrum.
  • the sound emissions are picked up by the sensors 5, 6, 7, 8 and fed to a control unit 17, which can comprise a microprocessor, an amplifier or suitable electrical or electronic control devices.
  • This control unit 17 further comprises a frequency filter 18, with the aid of which the frequencies occurring during normal operation of a machine or the relevant frequency spectrum can be filtered out.
  • the bandwidth is approximately between 200 Hz and 20,000 Hz.
  • the printer can determine from a certain deviating frequency behavior, represented by the curve at 20, that the machine is doubled or spontaneous undesirable or atypical web or sheet breaks occur, which lead to defective sheets or folded copies.
  • These frequencies can also be supplied to a loudspeaker 21 so that the operator is acoustically alerted to defective sheets or copies, i.e. it is audible that the machine is doubled.
  • the error detection device can be used in both sheet-fed and web-fed rotary printing machines.
  • the arrangement of the sensors 5, 6, 7, 8 can be such that the sound is detected via air or the sound or the vibrations can be detected directly on the machine frame or, for example, on the cylinders or their bearings.
  • control unit 17 can be used to control a device 22, 23 for temperature control of the rubbers 24, 25, 26, 27 of the inking units 28, 29.
  • control unit 17 controls corresponding rubber blanket washing devices 30, 31 after the speed of the printing press has been previously reduced by actuating the control panel 32.
  • the cause of the error can be localized and thus the control unit 17 can be programmed or connected accordingly.
  • the printer can recognize that the cause of undesired duplication is to be found in a specific printing unit or in a specific location on the machine.

Abstract

With the aid of sensors, a noise emitted by a printing machine and transmitted through the air or from a solid body, for example from parts of the printing machine or its side walls, is detected and analysed. The sound frequency spectrum typical of the machine is suppressed and the [lacuna] appropriate to doubling or to an atypical pull-off behaviour of the material undergoing printing, for example from the blanket cylinder, is detected and indicated optically or acoustically.

Description

Die Erfindung betrifft eine Einrichtung an einer Druck­maschine, die durch an verschiedenen Stellen angeordnete Sensoren in ihrer Funktion und ihrem Betriebszustand kon­trollierbar ist, wobei das Erreichen bestimmter Meßwerte zur Anzeige oder Einleitung von Steuervorgängen verwertbar ist.The invention relates to a device on a printing press, the function and operating state of which can be checked by sensors arranged at different points, wherein the achievement of certain measured values can be used to display or initiate control processes.

Aus der DE-OS 2 754 040 ist an einer Druckmaschine bekannt, an verschiedenen Aggregaten einer Druckmaschine Meßwertgeber anzuordnen, die bei bestimmten Abweichungen der gemessenen Werte, wie Temperatur, Ölstand etc. ein Warnsignal abgeben.From DE-OS 2 754 040 it is known on a printing press to arrange transducers on various units of a printing press, which transmit a warning signal in the event of certain deviations in the measured values, such as temperature, oil level, etc.

Aus der DE-OS 2 430 212 und der DE-PS 3 034 212 ist es bekannt, durch ein Dichtemeßgerät beispielsweise die Druckqualität der verarbeiteten Bogen zu erfassen und Bogen minderer Qualität zu kennzeichnen bzw. auszusondern.From DE-OS 2 430 212 and DE-PS 3 034 212 it is known to record, for example, the print quality of the processed sheets by means of a density measuring device and to mark or discard sheets of inferior quality.

Aus dem Stand der Technik kann der Fachmann lediglich die Lehre entnehmen, konkrete Betriebsstörungen aufgrund Tempe­raturerhöhung oder Passerfehler direkt durch Temperaturfüh­ler oder Densitometer zu ermitteln.From the prior art, the person skilled in the art can only learn from the teaching that specific operating faults due to temperature increase or registration errors can be determined directly by temperature sensors or densitometers.

Der Erfindung liegt die Aufgabe zugrunde, auftretende Druckschwierigkeiten, die vor allem zum Doublieren führen, meßtechnisch zu erfassen.The invention has for its object to detect pressure problems that occur, which lead above all to duplication, by measurement.

Diese Aufgabe wird durch die im Kennzeichen des 1. Anspruchs aufgeführten Kennzeichen gelöst.This object is achieved by the characteristics listed in the characterizing part of claim 1.

Durch diese Einrichtung ist es möglich, dem Drucker Infor­mationen über Druckgeschwindigkeit, notwendigem Wasch­intervall oder vor allem der Doublierneigung zu geben. Um ein Doublieren der Maschine zu erkennen, mußten beispiels­weise bei einer Bogen-Offset-Rotationsdruckmaschine die ausgelegten Bogen mit der Lupe untersucht werden oder bei einer Rollen-Rotationsdruckmaschine die Druckexemplare am Falzapparat betrachtet werden. Diese Methode weist den Nachteil auf, daß eventuell daraus zu ziehenden Konsequen­zen mit großer Zeitverzögerung wirksam werden. Wenn eine routinemäßige Kontrolle plötzlich Doubliererscheinungen auf­deckt, können bereits tausende Exemplare mit dem Fehler behaftet sein. Andererseits kommt es vor, daß mehrere Exem­plare doublieren und anschließend eine größere Anzahl wieder­um nicht. Die Fehlbogen bzw. Exemplare werden somit nicht gefunden und erst in der Weiterverarbeitung geben sie zu Reklamationen im Druckbetrieb Anlaß.With this device it is possible to give the printer information about the printing speed, the necessary washing interval or, above all, the tendency to double. In order to detect a duplication of the machine, for example in a sheet-fed offset rotary printing press designed sheets can be examined with a magnifying glass or the printed copies on a folder can be viewed on a rotary rotary printing press. This method has the disadvantage that any consequences that can be drawn from it take effect with a great time delay. If a routine inspection suddenly reveals duplication, thousands of copies can already be affected by the error. On the other hand, it happens that several copies are doubled and then a larger number are not. The missing sheets or copies are therefore not found and only in the further processing do they give rise to complaints in the printing company.

Die erhaltenen Meßwerte können zur automatischen Steuerung der Maschine, zur Informationsanzeige für den Drucker und zum Maschinenschutz verarbeitet werden. Deutet sich ein Doublieren dadurch an, daß die Abziehgeräusche des Bogens in eine kritische Zone kommen, so können Kommandos ausgelöst werden, um die rheologischen Eigenschaften der verwendeten Druckfarbe, wie die Farbzügigkeit zu ändern. Es kann die Temperatur des durch die Farbreiber fließenden Temperiermittels verändert werden, es kann aber auch der Zeitpunkt für das Gummituchwaschen vorverlegt bzw. der Waschintervall verändert werden. Im Extremfall kann bei Ausbleiben von Abrißgeräuschen, also wegen Fehlbogen, oder bei besonderem Ansteigen der Störgeräusche die Maschine stillgesetzt werden.The measured values obtained can be processed for automatic control of the machine, for information display for the printer and for machine protection. If a doubling is indicated by the fact that the peeling noises of the sheet come into a critical zone, commands can be triggered in order to change the rheological properties of the printing ink used, such as the color consistency. The temperature of the tempering agent flowing through the ink rubbers can be changed, but the time for the blanket washing can also be brought forward or the washing interval can be changed. In extreme cases, the machine can be stopped if there are no tearing noises, that is to say because of a false sheet, or if there is a particular increase in the amount of noise.

Die Erfindung macht sich dabei auch die Erkenntnis zunutze, daß die Ursache des Doublierens oder eines veränderten sporadisch auftretenden Abrissverhaltens der Druckträger­bahn oder eines Bogens vom Gummituchzylinder eine Folge irgendeiner mechanischer drucktechnischer Unruhe in der Maschine ist. An irgendeiner Stelle der Maschine geht kurzzeitig, beispielsweise an einem Zylinder oder bei der Bahnführung, die Gleichförmigkeit verloren, so daß die vorangehend erwähnten Fehler auftreten. Auf dieser Erkennt­nis aufbauend, wurde des weiteren festgestellt, daß der Verlust der Gleichförmigkeit im Druckprozeß bzw. in der Maschine eine Veränderung des Schallfrequenzspektrums mit sich bringt.The invention also makes use of the knowledge that the cause of the doubling or a changed sporadically occurring tearing behavior of the printing carrier web or a sheet from the blanket cylinder is a result of any mechanical unrest in the press. At some point the machine goes for a short time, for example on a cylinder or in the web guide, the uniformity is lost, so that the errors mentioned above occur. Based on this knowledge, it was also found that the loss of uniformity in the printing process or in the machine brings about a change in the sound frequency spectrum.

Ein Ausführungsbeispiel der Erfindung wird anhand nachfol­gender Zeichnung an einer Bogendruckmaschine noch näher erläutert und zwar zeigt schematisch:

  • Fig. 1 eine 4-Farben- Offsetdruckmaschine mit entspre­chend angeordneten Sensoren und
  • Fig. 2 einen Druckturm der Maschine gemäß Fig. 1 mit verschiedenen Zusatzeinrichtungen in vergrößer­ter Darstellung.
An exemplary embodiment of the invention is explained in more detail with reference to the following drawing on a sheet-fed printing press and shows schematically:
  • Fig. 1 shows a 4-color offset printing machine with appropriately arranged sensors and
  • Fig. 2 shows a pressure tower of the machine of FIG. 1 with various additional devices in an enlarged view.

Die Maschine gemäß Fig. 1 besteht aus einem Anleger 1, einem ersten Druckwerk 2, einem zweiten Druckwerk 3 und einem Ausleger 4. Sensoren 5, 6, 7, 8 zur Aufnahme des Luft- und Körperschalls sind jeweils im Bereich zwischen den Gummizylindern 9, 10 bzw. 11, 12 und dem Gegendruckzy­linder 13, 14 angeordnet. Dort ist maximale Schallintensi­tät, verursacht durch den Abriß des jeweils bedruckten Bogens 15 vom jeweiligen Gummizylinder 9 bzw. 10, gewähr­leistet. Der Abriß ist notwendig, weil - wie zwischen Zylinder 10 und 13 übertrieben dargestellt - der Bogen 15 aufgrund des Farbauftrags auf dem Gummizylinder 10 entgegen der Haltekraft des Greifers 16 der Krümmung des Gummizylin­ders 10 folgen will und vom Greifer 16 unter Uberwindung der Klebkraft der Farbe abgezogen werden muß. Es hat sich überraschend gezeigt, daß je nach Qualität des Druckfarben­ auftrags auf dem Gummituch, der ja unmittelbar die Druck­qualität auf den Bogen bestimmt, das durch das Abreißen verursachte Geräusch unterschiedliche Frequenzen aufweist.1 consists of a feeder 1, a first printing unit 2, a second printing unit 3 and a delivery 4. Sensors 5, 6, 7, 8 for receiving the airborne and structure-borne noise are each in the area between the rubber cylinders 9, 10 and 11, 12 and the impression cylinder 13, 14 arranged. There, maximum sound intensity, caused by the tearing of the printed sheet 15 from the respective rubber cylinder 9 or 10, is guaranteed. The demolition is necessary because - as exaggerated between cylinders 10 and 13 - the sheet 15 wants to follow the curvature of the rubber cylinder 10 due to the application of paint on the rubber cylinder 10 against the holding force of the gripper 16 and is removed from the gripper 16 while overcoming the adhesive force of the paint must become. It has surprisingly been found that, depending on the quality of the printing inks order on the rubber blanket, which directly determines the print quality on the sheet, the noise caused by the tearing has different frequencies.

Nach Fig. 1 und 2 werden die Schallemissionen von den Sensoren 5, 6, 7, 8 aufgenommen und einer Steuereinheit 17 zugeführt, die einen Mikroprozessor, einen Verstärker oder geeignete elektrische bzw. elektronische Steuerein­richtungen umfassen kann. Diese Steuereinheit 17 umfaßt des weiteren einen Frequenzfilter 18, mit dessen Hilfe die während des Normalbetriebes einer Maschine auftretenden Frequenzen bzw. das diesbezügliche Frequenzspektrum heraus­gefiltert werden kann. Die Bandbreite liegt etwa zwischen 200 Hz und 20.000 Hz. Somit kann mit Hilfe der Steuerein­heit 17 das für das Doublieren verantwortliche Geräusch in Form von bestimmten von der Maschinenbetriebsfrequenz bzw. vom Maschinengeräusch abweichenden Frequenzen einer An­zeigevorrichtung, beispielsweise einem Oszillograph 19 zugeführt werden. Somit kann der Drucker an einem bestimmten abweichenden Frequenzverhalten, dargestellt durch den Kurvenverlauf bei 20, feststellen, daß die Ma­schine doubliert oder spontane unerwünschte bzw. untypische Bahn- bzw. Bogenabrisse auftreten, die zu fehlerbehafteten Bogen oder Falzexemplaren führen. Diese Frequenzen können auch einem Lautsprecher 21 zugeleitet werden, so daß die Bedienungsperson akustisch auf fehlerbehaftete Bogen oder Exemplare aufmerksam gemacht wird, d.h. es ist hörbar, daß die Maschine doubliert.1 and 2, the sound emissions are picked up by the sensors 5, 6, 7, 8 and fed to a control unit 17, which can comprise a microprocessor, an amplifier or suitable electrical or electronic control devices. This control unit 17 further comprises a frequency filter 18, with the aid of which the frequencies occurring during normal operation of a machine or the relevant frequency spectrum can be filtered out. The bandwidth is approximately between 200 Hz and 20,000 Hz. Thus, with the help of the control unit 17, the noise responsible for the doubling in the form of certain frequencies deviating from the machine operating frequency or machine noise can be fed to a display device, for example an oscillograph 19. Thus, the printer can determine from a certain deviating frequency behavior, represented by the curve at 20, that the machine is doubled or spontaneous undesirable or atypical web or sheet breaks occur, which lead to defective sheets or folded copies. These frequencies can also be supplied to a loudspeaker 21 so that the operator is acoustically alerted to defective sheets or copies, i.e. it is audible that the machine is doubled.

Die erfindungsgemäße Fehlerfeststellvorrichtung kann sowohl in Bogen- als auch in Rollen-Rotationsdruckmaschinen einge­setzt werden. Die Anordnung der Sensoren 5, 6, 7, 8 kann so getroffen werden, daß der Schall über Luft erfaßt wird oder es kann eine Erfassung des Schalles bzw. der Schwingungen direkt am Maschinengestell oder z.B. an den Zylindern oder deren Lager erfolgen.The error detection device according to the invention can be used in both sheet-fed and web-fed rotary printing machines. The arrangement of the sensors 5, 6, 7, 8 can be such that the sound is detected via air or the sound or the vibrations can be detected directly on the machine frame or, for example, on the cylinders or their bearings.

In vorteilhafter Weise kann mit der Steuereinheit 17 eine Vorrichtung 22, 23 zur Temperierung der Reiber 24, 25, 26, 27 der Farbwerke 28, 29 angesteuert werden.Advantageously, the control unit 17 can be used to control a device 22, 23 for temperature control of the rubbers 24, 25, 26, 27 of the inking units 28, 29.

Ebenso ist es bei manchen Betriebszuständen notwendig, das Gummituch zu waschen, demzufolge steuert die Steuereinheit 17 entsprechende Gummituchwascheinrichtungen 30, 31 an, nachdem die Drehzahl der Druckmaschine durch Ansteuerung des Steuerpults 32 zuvor reduziert worden ist.Likewise, in some operating states it is necessary to wash the rubber blanket, consequently the control unit 17 controls corresponding rubber blanket washing devices 30, 31 after the speed of the printing press has been previously reduced by actuating the control panel 32.

Durch Anordnung von mehreren Sensoren ist eine Lokali­sierung der Fehlerursache und damit eine entsprechende Programmierung bzw. Verschaltung der Steuereinheit 17 mög­lich. Der Drucker kann erkennen, daß die Ursache für ein unerwünschtes Doublieren in einem bestimmten Druckwerk oder an einer bestimmten Stelle der Maschine zu finden ist.By arranging a plurality of sensors, the cause of the error can be localized and thus the control unit 17 can be programmed or connected accordingly. The printer can recognize that the cause of undesired duplication is to be found in a specific printing unit or in a specific location on the machine.

Claims (6)

1.) Einrichtung an einer Druckmaschine, die durch an ver­schiedenen Stellen angeordnete Sensoren in ihrer Funktion und ihrem Betriebszustand kontrollierbar ist,
wobei das Erreichen bestimmter Meßwerte zur Anzeige oder Einleitung von Steuervorgängen verwertbar ist, dadurch gekennzeichnet,
daß die Sensoren mit einer Steuereinheit (17) ver­bundene Aufnehmer (5, 6, 7, 8) für Luft- und Körper­schall sind, daß die Steuereinheit (17) einen Frequenzfilter (18) zur Herausfilterung charakteristi­scher Frequenzen aufweist, die bei Maschinenstörungen wie beispielsweise Doublieren auftreten und von den normalen beim Abriß des Bedruckstoffs (15) vom Gummi­zylinder (9, 10) üblicherweise während des Maschinen­betriebs auftretenden Frequenzen abweichen.1.) device on a printing press, the function and operating state of which can be controlled by sensors arranged at different points,
wherein certain measured values can be used to display or initiate control processes, characterized in that
that the sensors with a control unit (17) connected transducers (5, 6, 7, 8) for airborne and structure-borne noise, that the control unit (17) has a frequency filter (18) for filtering out characteristic frequencies, which occur in the event of machine malfunctions such as doubling occur and deviate from the normal frequencies usually occurring during machine operation when the printing material (15) is torn from the blanket cylinder (9, 10). 2.) Einrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß durch die Steuereinheit (17) eine Vorrichtung (22. 23; 26. 27) zur Temperierung der Farbverreibwalzen (24, 25) ansteuerbar ist.2.) Device according to claim 1,
characterized by
that a device (22, 23; 26, 27) for tempering the ink distribution rollers (24, 25) can be controlled by the control unit (17). 3.) Einrichtung nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß durch die Steuereinheit (17) eine Vorrichtung zum Markieren von Bogen an einer Bogenmaschine ansteuer­bar ist.3.) Device according to claim 1 or 2,
characterized by
that by the control unit (17) a device for Marking sheets on a sheet machine is controllable. 4.) Einrichtung nach Anspruch 1, 2 oder 3,
dadurch gekennzeichnet,
daß durch die Steuereinheit (17) eine Vorrichtung zur Bahnspannungskonstanthaltung an Rollenrotation­drucksmaschinen ansteuerbar ist.4.) Device according to claim 1, 2 or 3,
characterized by
that a device for keeping web tension constant on web-fed rotary printing presses can be controlled by the control unit (17). 5.) Einrichtung nach Anspruch 1, 2, 3 oder 4,
dadurch gekennzeichnet,
daß durch die Steuereinheit (17) der Antriebsmotor und die Gummituchwascheinrichtungen (30, 31) der Druckma­schine ansteuerbar sind.5.) Device according to claim 1, 2, 3 or 4,
characterized by
that the drive motor and the blanket washing devices (30, 31) of the printing press can be controlled by the control unit (17). 6.) Einrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß der Sensor als Mikrophon ausgebildet ist, dem eine Verstärkereinrichtung mit Lautsprecher (21) nachgeord­net ist.6.) Device according to claim 1,
characterized by
that the sensor is designed as a microphone, which is followed by an amplifier device with loudspeaker (21).
EP87111629A 1986-09-05 1987-08-11 Device for detecting defects Expired - Lifetime EP0259636B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87111629T ATE63857T1 (en) 1986-09-05 1987-08-11 FAULT DETECTION DEVICE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3630288 1986-09-05
DE19863630288 DE3630288A1 (en) 1986-09-05 1986-09-05 FAULT DETECTING DEVICE

Publications (3)

Publication Number Publication Date
EP0259636A2 true EP0259636A2 (en) 1988-03-16
EP0259636A3 EP0259636A3 (en) 1988-12-21
EP0259636B1 EP0259636B1 (en) 1991-05-29

Family

ID=6309002

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87111629A Expired - Lifetime EP0259636B1 (en) 1986-09-05 1987-08-11 Device for detecting defects

Country Status (3)

Country Link
EP (1) EP0259636B1 (en)
AT (1) ATE63857T1 (en)
DE (2) DE3630288A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2275704A1 (en) 2009-07-15 2011-01-19 WIFAG Maschinenfabrik AG Monitoring a device that produces vibrations

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4131679C1 (en) * 1991-09-24 1993-04-08 Man Roland Druckmaschinen Ag, 6050 Offenbach, De

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1982003589A1 (en) * 1981-04-13 1982-10-28 Forsgren Roland Method and apparatus for monitoring the tool status in a tool machine with cyclic machining
EP0087571A1 (en) * 1982-02-19 1983-09-07 Forschungsgesellschaft Druckmaschinen e.V. Measuring device for the real time registration without contact of the properties or quantities characterising the process for separating or splitting liquid volumes or layers in roller gaps of printing machines

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3225360A1 (en) * 1982-07-07 1984-02-09 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach ROLL OFFSET ROTATION PRINTING MACHINE

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1982003589A1 (en) * 1981-04-13 1982-10-28 Forsgren Roland Method and apparatus for monitoring the tool status in a tool machine with cyclic machining
EP0087571A1 (en) * 1982-02-19 1983-09-07 Forschungsgesellschaft Druckmaschinen e.V. Measuring device for the real time registration without contact of the properties or quantities characterising the process for separating or splitting liquid volumes or layers in roller gaps of printing machines

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, Band IA-20, Nr. 3, Teil 1, Mai-Juni 1984, Seiten 519-527, IEEE, New York, US; J.T. RENWICK: "Condition monitoring of machinery using computerized vibration signature analysis" *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2275704A1 (en) 2009-07-15 2011-01-19 WIFAG Maschinenfabrik AG Monitoring a device that produces vibrations

Also Published As

Publication number Publication date
EP0259636B1 (en) 1991-05-29
EP0259636A3 (en) 1988-12-21
DE3630288A1 (en) 1988-03-17
DE3770377D1 (en) 1991-07-04
DE3630288C2 (en) 1993-04-08
ATE63857T1 (en) 1991-06-15

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