(19)
(11)EP 3 280 663 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
11.12.2019 Bulletin 2019/50

(21)Application number: 15888650.7

(22)Date of filing:  07.04.2015
(51)International Patent Classification (IPC): 
B65H 5/00(2006.01)
G03G 15/00(2006.01)
(86)International application number:
PCT/US2015/024734
(87)International publication number:
WO 2016/163997 (13.10.2016 Gazette  2016/41)

(54)

AUTOMATIC DOCUMENT FEEDER

AUTOMATISCHE DOKUMENTENZUFÜHRVORRICHTUNG

CHARGEUR AUTOMATIQUE DE DOCUMENTS


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(43)Date of publication of application:
14.02.2018 Bulletin 2018/07

(73)Proprietor: Hewlett-Packard Development Company, L.P.
Spring TX 77389 (US)

(72)Inventors:
  • LIM, Sean BS
    Singapore 109683 (SG)
  • WOON, Lim Cheng
    Singapore 109683 (SG)
  • PRAVEEN, Francis
    Singapore 109683 (SG)

(74)Representative: HGF Limited 
Fountain Precinct Balm Green
Sheffield S1 2JA
Sheffield S1 2JA (GB)


(56)References cited: : 
JP-A- H1 138 800
US-A- 5 852 501
US-A1- 2015 029 563
US-B2- 8 005 388
KR-A- 20120 062 936
US-A1- 2004 256 583
US-B2- 7 139 108
US-B2- 8 810 860
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    Background



    [0001] Automatic document feeders (ADF) are often included in printers, scanners, and multi-function devices for automatically loading and unloading single sheets of media, such as paper, sequentially to a functional station where the apparatus performs an operation (e.g., sequentially scanning the fed document sheets for copying, faxing, or displaying on a computer monitor). In an ADF system, detection of leading and trailing edges of the media feeding through it is used so that the system can know when to start and stop scanning. This is typically performed through at least one electronic sensor and a flag. Automatic document feeders typically utilize sensors for detecting the leading edge of a document as the document is withdrawn from an input or supply tray and fed into the scanner. From the point in time that the leading edge is detected, the amount of time to convey the leading edge to the imaging sensor is monitored so that the imaging sensor can initiate actual imaging (scanning) reader at the precise time when the leading edge of the document reaches the imaging reader. This amount of time will be more or less depending on the relative location of the sensor, or sensors, in the ADF document feed path.

    [0002] US 2015/029563 A1 discloses a method of detecting whether a lid of an image scanner is closed and methods for improving the detection of a closed lid by an optical window of the scanner by also considering whether a document from an automatic document feeder has been detected.

    [0003] US 7 139 108 B2 discloses a method of utilizing a single sensor to detect the opening of a lid of an automatic document feeder, ADF, and to detect the leading edge of an ADF fed document to initiate the scanning process at the precise time the document reaches the ADF scan window.

    [0004] US 2004/256583 A1 discloses a method of detecting an optical object present on a feed path using an optical sensor configured to view a reference pattern through the feed path, where the absence of the reference pattern from the view of the optical sensor indicates the presence of an object on the feed path.

    Brief Description of the Drawings



    [0005] 

    Figure 1 is a block diagram of an automatic document feeder system in accordance with an example.

    Figure 2 is perspective view of an automatic document feeder useful in an automatic document feeder system in accordance with an example.

    Figure 3A is cross-sectional view of an automatic document feeder system with a reflective trigger in a standby position in accordance with an example.

    Figure 3B is a cross-sectional view of the automatic document feeder system of Figure 3A with a reflective trigger in a triggered position in accordance with an example.

    Figure 4 is a flow chart illustrating an example method for detecting an edge of a document to be scanned with an automatic document feeder system.


    Detailed Description



    [0006] In the following detailed description, reference is made to the accompanying drawings which form a part hereof, and in which is shown by way of illustration specific examples in which the disclosure may be practiced. It is to be understood that other examples may be utilized and structural or logical changes may be made without departing from the scope of the present disclosure. The following detailed description, therefore, is not to be taken in a limiting sense, and the scope of the present disclosure is defined by the appended claims. It is to be understood that features of the various examples described herein may be combined, in part or whole, with each other, unless specifically noted otherwise.

    [0007] An automatic document feeder system 10 for detecting a media edge is illustrated in Figure 1. Examples of system 10 include an image reader 12 and an automatic document feeder (ADF) 14. In general terms, ADF 14 automatically feeds medium, such as printed documents, for example, page by page through system 10. Image reader 12 reads, or scans, the documents as they pass through system 10. Image reader 12 includes an optical window 16 and a light source 18 illuminating optical window 16. ADF 14 includes a reflective flag 20 positioned within a viewing region 22 of optical window 16. (see, e.g., Figures 3A-3B)

    [0008] As illustrated in Figure 2, ADF 14 includes a housing 24. Reflective flag 20 is movable relative to housing 24. With additional reference to Figures 3A-3B, reflective flag 20 includes a trigger 26 extending laterally from a pivotal axis 28 of reflective flag 20. A reflective surface 30 of reflective flag 20 is extended from the pivotal axis 28 on an arm 32. Trigger 26 is radially spaced from reflective surface 30 on reflective flag 20. Trigger 26 has a fixed relationship to reflective surface 30. ADF 14 includes an opening 34 in a scroll bar 36. Reflective surface 30 of reflective flag 20 can be viewable to image reader 12 through opening 34 in a standby, or untriggered, state and unviewable to image reader 12 in a triggered state. In one example, a trigger opening 38 is a slotted opening included in housing 24 of ADF 14 directly above opening 34. Trigger opening 38 is sized and shaped to provide for rotation movement of trigger 26 extending partially through trigger opening 38. Opening 34 and trigger opening 38 can both be slotted openings.

    [0009] Trigger 26 extends through trigger opening 38 into a media path 40 (indicated by a dashed line). Media, such as paper or slides, for example, can have multiple sheets, each having a leading edge and a trailing edge. As media moved by ADF 14 contacts trigger 26, trigger 26 is rotationally moved about pivotal axis 28 by the force of document moved along media path 40. Media moved along media path 40 passes trigger 26 prior to opening 34 and reflective surface 30. Rotational movement of trigger 26 causes reflective surface 30 to similarly rotationally move, notifying system 10 of the upcoming leading edge prior to the leading edge crossing a scan line 42 defined within optical window 16 of image reader 12 as described in more detail below.

    [0010] As illustrated in Figures 3A-3B, image reader 12 includes optical, or scan, window 16 where ADF-fed media is read, or scanned. Reflective flag 20 is movably positioned adjacent to optical window 16 within viewing region 22. As illustrated in Figure 3A, reflective surface 30 of reflective flag 20 is positioned directly adjacent optical window 16 in a standby position. As illustrated in Figure 3B, reflective flag 20 is rotated to position reflective surface 30 away from viewing region 22 of optical window 16 in a triggered position. Reflective surface 30 can be rotatably positioned within housing 24 of ADF 14 in the triggered position.

    [0011] System 10 includes a single image reader 12 to detect both leading and trailing edges of an automatically fed medium and to scan/read an image on the medium. System 10 positions trigger 26 prior to reflective surface 30 in the media path 40 to detect the leading edge of ADF fed medium and notify image reader 12 of the position and movement of the medium. Movement of the medium across trigger 26 prior to the document crossing scan line 42 provides system 10 time to react and respond as the medium leading edge crosses trigger 26, rotationally moving reflective surface 30 out of the viewing region 22 of optical window 16. In response to reflective surface 30, no longer viewable to image reader 12, system 10 detects when to start scanning prior to the medium edge crossing scan line 42 of image reader 12 and for margins reliability and accuracy. Image reader 12 initiates the scanning process at the precise time the medium reaches optical window 16. Upon the trailing edge of the medium entirely passing trigger 26, reflective flag 20 is rotationally and gravitationally returned to the standby state and reflective surface 30 resumes position in opening 34. As the trailing edge of the medium passes through scan line 42, reflective surface 30 is again exposed to image reader 12 and the scan is terminated. The process is resumed, or continued, as additional medium is fed by ADF 14 through media path 40.

    [0012] Image reader 12 can be an optical scanner, for example, operated by imaging an object on a medium, such as a sheet of paper, with light source 18, sensing a resultant light signal with an optical sensor array (not shown). Each optical sensor in the array generates a data signal representative of the intensity of light impinged thereon for a corresponding portion of the imaged object. The data signals from the array sensors are then processed (typically digitized) and stored in a temporary memory for subsequent manipulation and printing or display. The image of the scanned object is projected onto the optical photo sensor array incrementally by use of a moving scan line 42. Moving scan line 42 is produced by moving the medium with respect to image reader 12. The medium is moved with respect to the image reader 12 by ADF 14.

    [0013] The brightness, or light signal, of reflective surface 30 is in contrast to the brightness, or light signal, of other surfaces of reflective flag 20 rotationally viewable to image reader 12 and documents passed through scan line 42. The brightness of reflective surface 30 has higher pixel values in contrast to the medium and other surfaces. Reflective surface 30 provides high contrast definition between a state of medium presence and absence. With the high contrast, the opportunity for erroneous detection of media is reduced and reliability of a scan is improved. Scanning is prompted by the change in average pixel values indicative of the leading edge of the medium to be scanned.

    [0014] Image reader 12 can be calibrated prior to media being fed through ADF system 10. During calibration, reflective surface 30 is scanned and image data related to the brightness, or light reflectance, value of reflective surface 30 is acquired and stored for threshold comparison. For example, pixel samples are collected under reflective surface 30 of reflective flag 20 and the average values of all samples are calculated. In one example, the pixel samples average between current and previous scanned lines are compared and it is determined whether the average value exceeds an edge detection threshold value. The edge detection threshold value can be established by calibration or predetermined. If the average value does not exceed the edge detection threshold value established by the image data of the reflective surface 30, the process is started over again with the pixel samples under the reflective surface 30 being collected. When the average value does exceed the edge detection threshold value established by the image data of the reflective surface 30, the leading edge is detected. The medium is moved by ADF 14 along media path 40 to scan position along scan line 42 and the scan of the medium is started.

    [0015] System 10 is not dependent on the use of a color scan. A mono scan (i.e., grayscale) can be used with system 10. In one example, a mono scan is faster than a color scan, so a faster scan speed is achieved with system 10 when a mono scan is utilized. The mono scan enables full utilization of the scanner speeds. Scroll bar 36 of AFD 14 is positioned along scan line 42. In one example, scroll bar 36 is white. Reflective surface 30 of reflective flag 20 can be the same color or a different color than scroll bar 36. The medium can often have a white background and documents of varied sizes (e.g., legal, letter, etc.) moving across scroll bar 36, in particular when scroll bar 36 and the medium are both white, can be scanned without a loss of scanned content over the width of scroll bar 36 regardless of the medium width.

    [0016] Figure 4 illustrates one example method 100 of document edge detection. At 102, a light source is reflected off a reflective surface of a flag in an optical window of a document feeding device in a first state. At 104, movement of a medium is initiated through the document feeding device. At 106, medium contacts against a trigger of the flag. At 108, the reflective surface of the flag rotates out of the optical window in response to movement of the medium past the trigger. At 110, light reflectance in the optical window is changed to a second state. At 112, a leading edge of the medium is detected in response to the change of state prior to the medium passing into the optical window. At 114, movement of the medium is continued through the document feeding device.

    [0017] Although specific examples have been illustrated and described herein, a variety of alternate and/or equivalent implementations may be substituted for the specific examples shown and described without departing from the scope of the present disclosure. This application is intended to cover any adaptations or variations of the specific examples discussed herein. Therefore, it is intended that this disclosure be limited only by the claims.


    Claims

    1. An automatic document feeding system (10), comprising:

    an image reader (12) including an optical window (16) and a light source (18) illuminating the optical window; and

    an automatic document feeder (14) including a reflective flag (20) positioned within a viewing region of the optical window to reflect the light source, the reflective flag including a trigger (26) extending laterally from a pivotal axis (28) of the reflective flag (20) and a reflective surface (30) extending from the pivotal axis on an arm (32), wherein the trigger extends into a media path (40) at a location prior to the optical window, wherein movement of a medium against the trigger initiates rotational movement of the reflective flag about the pivotal axis in a direction of the media path, wherein the trigger and the reflective surface are disposed at different respective positions with respect to the pivotal axis such that the initiated rotational movement of the reflective flag is to cause rotation of the trigger towards the optical window and rotation of the reflective surface away from the optical window and signals the leading edge of the medium.


     
    2. The automatic document feeding system of claim 1, wherein the image reader is an optical scanner and the optical window is a scan window.
     
    3. The automatic document feeding system of claim 2, wherein the automatic document feeding system is a scanning device and the automatic document feeder is to move the medium through the scanning device
     
    4. The scanning device of claim 3, wherein the reflective surface is moved from a first position to a second position in response to movement of the medium against the trigger.
     
    5. The scanning device of claim 4, wherein movement of the trigger in response to movement of the medium against the trigger causes the reflective flag to transition from the first position to the second position.
     
    6. The scanning device of claim 3, wherein movement of the reflective flag signals the scanning assembly to begin scanning.
     
    7. A method of automatic document feeding, comprising:

    reflecting (102) a light source with a reflective surface of a reflective flag in an optical window of a document feeding device in a first state;

    initiating (104) movement of a medium through the document feeding device;

    contacting (106) the medium against a trigger of the reflective flag extending into a media path at a location prior to the optical window;

    triggering (108) in response to movement of a medium past the trigger rotational movement of the reflective flag about a pivotal axis in a direction of the media path;

    changing (110) light reflectance in the optical window to a second state, wherein the trigger is rotated towards the optical window and the reflective surface of the reflective flag is rotated out of the optical window;

    signalling a leading edge of the medium by the change of state prior to the medium passing into the optical window; and

    continuing (114) movement of the medium through the document feeding device.


     
    8. The method of claim 7, further comprising:
    detecting a leading edge of the medium in response to the change in state prior to the medium passing the optical window.
     
    9. The method of claim 8, further comprising:
    signaling a scanner to begin scanning a predetermined time after the change to the second state.
     
    10. The method of claim 8, further comprising:
    scanning the reflective surface to calibrate the light reflectance of the reflective surface.
     
    11. The method of claim 10, further comprising:
    storing a value of a light reflectance of the reflective surface.
     
    12. The method of claim 9, further comprising:
    comparing the value of the light reflectance of the reflective surface to other values of light reflectance scanned.
     
    13. The method of claim 7, further comprising:
    returning the flag to the first state as the trailing edge is moved past the trigger; and detecting a trailing edge of the medium in response to the return to the first state.
     


    Ansprüche

    1. Automatisches Dokumentenzuführsystem (10), das Folgendes umfasst:

    ein Bildlesegerät (12) mit einem optischen Fenster (16) und einer Lichtquelle (18), die das optische Fenster beleuchtet; und

    eine automatische Dokumentenzuführung (14) mit einer reflektierenden Markierung (20), die in einem Sichtbereich des optischen Fensters positioniert ist, um die Lichtquelle zu reflektieren, wobei die reflektierende Markierung einen Auslöser (26), der sich seitlich von einer Schwenkachse (28) der reflektierenden Markierung (20) erstreckt, und eine reflektierende Oberfläche (30) beinhaltet, die sich von der Schwenkachse an einem Arm (32) erstreckt, wobei sich der Auslöser in einen Medienpfad (40) an einer Stelle vor dem optischen Fenster erstreckt, wobei die Bewegung eines Mediums gegen den Auslöser eine Drehbewegung der reflektierenden Markierung um die Schwenkachse in einer Richtung des Medienpfades auslöst, wobei der Auslöser und die reflektierende Oberfläche an verschiedenen jeweiligen Positionen in Bezug auf die Schwenkachse angeordnet sind, so dass die eingeleitete Drehbewegung der reflektierenden Markierung eine Drehung des Auslösers in Richtung des optischen Fensters und eine Drehung der reflektierenden Oberfläche weg vom optischen Fenster bewirken soll und die Vorderkante des Mediums signalisiert.


     
    2. Automatisches Dokumentenzuführsystem nach Anspruch 1, wobei das Bildlesegerät ein optischer Scanner ist und das optische Fenster ein Scanfenster ist.
     
    3. Automatisches Dokumentenzuführsystem nach Anspruch 2, wobei das automatische Dokumentenzuführsystem eine Scanvorrichtung ist und die automatische Dokumentenzuführung das Medium durch die Scanvorrichtung bewegen soll.
     
    4. Scanvorrichtung nach Anspruch 3, wobei die reflektierende Oberfläche als Reaktion auf die Bewegung des Mediums gegen den Auslöser von einer ersten Position in eine zweite Position bewegt wird.
     
    5. Scanvorrichtung nach Anspruch 4, wobei eine Bewegung des Auslösers als Reaktion auf eine Bewegung des Mediums gegen den Auslöser bewirkt, dass die reflektierende Markierung von der ersten Position in die zweite Position übergeht.
     
    6. Scanvorrichtung nach Anspruch 3, wobei die Bewegung der reflektierenden Markierung der Scananordnung signalisiert, mit dem Scannen zu beginnen.
     
    7. Verfahren zum automatischen Zuführen von Dokumenten, das Folgendes umfasst:

    Reflektieren (102) einer Lichtquelle mit einer reflektierenden Oberfläche einer reflektierenden Markierung in einem optischen Fenster einer Dokumentenzuführvorrichtung in einem ersten Zustand;

    Einleiten (104) einer Bewegung eines Mediums durch die Dokumentenzuführvorrichtung;

    Inkontaktbringen (106) des Mediums gegen einen Auslöser der reflektierenden Markierung, der sich in einen Medienpfad an einer Stelle vordem optischen Fenster erstreckt;

    Auslösen (108) als Reaktion auf eine Bewegung eines Mediums über die Auslösung der Rotationsbewegung der reflektierenden Markierung um eine Schwenkachse in einer Richtung des Medienpfades hinaus;

    Ändern (110) der Lichtreflexion im optischen Fenster in einen zweiten Zustand, wobei der Auslöser in Richtung des optischen Fensters gedreht wird und die reflektierende Oberfläche der reflektierenden Markierung aus dem optischen Fenster gedreht wird;

    Signalisieren einer Vorderkante des Mediums durch die Zustandsänderung, bevor das Medium in das optische Fenster eintritt; und

    Fortsetzen (114) der Bewegung des Mediums durch die Dokumentenzuführvorrichtung.


     
    8. Verfahren nach Anspruch 7, ferner umfassend:
    Erfassen einer Vorderkante des Mediums als Reaktion auf die Zustandsänderung, bevor das Medium das optische Fenster passiert.
     
    9. Verfahren nach Anspruch 8, ferner umfassend:
    Signalisieren an einen Scanner, mit dem Scannen zu einer vorbestimmten Zeit nach dem Wechsel in den zweiten Zustand zu beginnen.
     
    10. Verfahren nach Anspruch 8, ferner umfassend:
    Scannen der reflektierenden Oberfläche, um den Lichtreflexionsgrad der reflektierenden Oberfläche zu kalibrieren.
     
    11. Verfahren nach Anspruch 10, ferner umfassend:
    Speichern eines Wertes eines Lichtreflexionsgrades der reflektierenden Oberfläche.
     
    12. Verfahren nach Anspruch 9, ferner umfassend:
    Vergleichen des Wertes des Lichtreflexionsgrades der reflektierenden Oberfläche mit anderen Werten des abgetasteten Lichtreflexionsgrades.
     
    13. Verfahren nach Anspruch 7, ferner umfassend:

    Zurückführen der Markierung in den ersten Zustand, wenn die hintere Kante über den Auslöser hinaus bewegt wird; und

    Erfassen einer hinteren Kante des Mediums als Reaktion auf das Zurückführen in den ersten Zustand.


     


    Revendications

    1. Système d'alimentation automatique en documents (10), comprenant :

    un lecteur d'image (12) comportant une fenêtre optique (16) et une source de lumière (18) illuminant la fenêtre optique ; et

    un introducteur automatique (14) comportant un repère réfléchissant (20) positionné à l'intérieur d'une région de visualisation de la fenêtre optique afin de réfléchir la source de lumière, le repère réfléchissant comportant un déclencheur (26) s'étendant latéralement à partir d'un axe de pivotement (28) du repère réfléchissant (20) et une surface réfléchissante (30) s'étendant à partir de l'axe de pivotement sur un bras (32), dans lequel le déclencheur s'étend dans un chemin de support (40) à un emplacement précédant la fenêtre optique, dans lequel un déplacement d'un support contre le déclencheur amorce le déplacement rotationnel du repère réfléchissant autour de l'axe de pivotement dans une direction du chemin de support, dans lequel le déclencheur et la surface réfléchissante sont disposés à différentes positions respectives par rapport à l'axe de pivotement de telle sorte que le déplacement rotationnel amorcé du repère réfléchissant amène la rotation du déclencheur vers la fenêtre optique et la rotation de la surface réfléchissante à l'opposé de la fenêtre optique et signale le bord d'entrée du support.


     
    2. Système d'alimentation automatique en documents selon la revendication 1, dans lequel le lecteur d'image est un balayeur optique et la fenêtre optique est une fenêtre de balayage.
     
    3. Système d'alimentation automatique en documents selon la revendication 2, dans lequel le système d'alimentation automatique en documents est un dispositif de balayage et l'introducteur automatique est destiné à déplacer le support à travers le dispositif de balayage.
     
    4. Dispositif de balayage selon la revendication 3, dans lequel la surface réfléchissante est déplacée à partir d'une première position à une seconde position en réponse au déplacement du support contre le déclencheur.
     
    5. Dispositif de balayage selon la revendication 4, dans lequel le déplacement du déclencheur en réponse au déplacement du support contre le déclencheur amène le repère réfléchissant à passer de la première position à la seconde position.
     
    6. Dispositif de balayage selon la revendication 3, dans lequel un déplacement du repère réfléchissant signale à l'ensemble de balayage de commencer à balayer.
     
    7. Procédé d'alimentation en documents automatique, comprenant :

    la réflexion (102) d'une source de lumière avec une surface réfléchissante d'un repère réfléchissant dans une fenêtre optique d'un dispositif d'alimentation en documents dans un premier état ;

    l'amorce (104) d'un déplacement d'un support à travers le dispositif d'alimentation en documents ;

    la mise en contact (106) du support contre un déclencheur du repère réfléchissant s'étendant dans un chemin de support à un emplacement précédant la fenêtre optique ;

    le déclenchement (108) en réponse au déplacement d'un support au-delà du déplacement rotationnel du déclencheur du repère réfléchissant autour d'un axe de pivotement dans une direction du chemin de support ;

    le changement (110) de la réflectance à la lumière dans la fenêtre optique à un second état, le déclencheur étant tourné vers la fenêtre optique et la surface réfléchissante du repère réfléchissant étant tournée en dehors de la fenêtre optique ;

    la signalisation d'un bord d'entrée du support par le changement d'état précédant le passage du support dans la fenêtre optique ; et

    la poursuite (114) du déplacement du support à travers le dispositif d'alimentation en documents.


     
    8. Procédé selon la revendication 7, comprenant en outre :
    la détection d'un bord d'entrée du support en réponse au changement d'état précédant le passage du support dans la fenêtre optique.
     
    9. Procédé selon la revendication 8, comprenant en outre :
    la signalisation à un dispositif de balayage de commencer à balayer à un moment prédéterminé après le changement au second état.
     
    10. Procédé selon la revendication 8, comprenant en outre :
    le balayage de la surface réfléchissante afin d'étalonner la réflectance à la lumière de la surface réfléchissante.
     
    11. Procédé selon la revendication 10, comprenant en outre :
    le stockage d'une valeur d'une réflectance à la lumière de la surface réfléchissante.
     
    12. Procédé selon la revendication 9, comprenant en outre :
    la comparaison de la valeur de la réflectance à la lumière de la surface réfléchissante à d'autres valeurs de réflectance à la lumière balayées.
     
    13. Procédé selon la revendication 7, comprenant en outre :
    le retour du repère au premier état tandis que le bord arrière est déplacé au-delà du déclencheur ; et la détection d'un bord arrière du support en réponse au retour au premier état.
     




    Drawing

















    Cited references

    REFERENCES CITED IN THE DESCRIPTION



    This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

    Patent documents cited in the description