EP1632821B1 - Elément de transfert intermédiare avec un élément de nettoyage - Google Patents

Elément de transfert intermédiare avec un élément de nettoyage Download PDF

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Publication number
EP1632821B1
EP1632821B1 EP20050107553 EP05107553A EP1632821B1 EP 1632821 B1 EP1632821 B1 EP 1632821B1 EP 20050107553 EP20050107553 EP 20050107553 EP 05107553 A EP05107553 A EP 05107553A EP 1632821 B1 EP1632821 B1 EP 1632821B1
Authority
EP
European Patent Office
Prior art keywords
image transfer
cleaning
transfer member
image
zone
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.)
Not-in-force
Application number
EP20050107553
Other languages
German (de)
English (en)
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EP1632821A1 (fr
Inventor
Lambertus M.L. Van Sas
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.)
Canon Production Printing Netherlands BV
Original Assignee
Oce Technologies BV
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Filing date
Publication date
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Priority to EP20050107553 priority Critical patent/EP1632821B1/fr
Publication of EP1632821A1 publication Critical patent/EP1632821A1/fr
Application granted granted Critical
Publication of EP1632821B1 publication Critical patent/EP1632821B1/fr
Not-in-force legal-status Critical Current
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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
    • G03G15/16—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
    • G03G15/1605—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using at least one intermediate support
    • G03G15/161—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using at least one intermediate support with means for handling the intermediate support, e.g. heating, cleaning, coating with a transfer agent
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
    • G03G15/16—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
    • G03G15/1605—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using at least one intermediate support
    • G03G15/162—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using at least one intermediate support details of the the intermediate support, e.g. chemical composition
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
    • G03G15/24—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 whereby at least two steps are performed simultaneously
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/01—Apparatus for electrophotographic processes for producing multicoloured copies
    • G03G2215/0103—Plural electrographic recording members
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/16—Transferring device, details
    • G03G2215/1647—Cleaning of transfer member
    • G03G2215/1652—Cleaning of transfer member of transfer roll
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/16—Transferring device, details
    • G03G2215/1647—Cleaning of transfer member
    • G03G2215/1657—Cleaning of transfer member of transfer drum
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/16—Transferring device, details
    • G03G2215/1676—Simultaneous toner image transfer and fixing
    • G03G2215/1695—Simultaneous toner image transfer and fixing at the second or higher order transfer point

Definitions

  • the present invention is directed to an image transfer device for transferring images of a marking substance, including ink and toner, from an image transfer member to a recording medium. Moreover the invention is related to a method of removing debris from the surface of the image transfer member of such image transfer device.
  • Image reproduction systems such as printers and copiers, often include an image transfer device having an image transfer member, usually in the form of a belt or a drum, for receiving on its surface a marking substance, such as toner or ink, in image form and for subsequently transferring these images of marking substance in a transfer zone to a recording medium, such as paper.
  • a marking substance such as toner or ink
  • the image transfer member In an operative state, the image transfer member is urged against a counter member in the transfer zone while the recording medium passes therebetween.
  • the transfer may take place by means of pressure, or heat, or heat and pressure each of them optionally assisted by electrostatic forces and/or vibrational forces.
  • the marking substance is a toner, the marking substance must be fixed onto the receiving material in order to render the images permanent.
  • transfer and fixing take place simultaneously. Otherwise a subsequent fixing step is to be executed. For example, this may be done by feeding the recording medium, onto which the unfixed marking substance is already deposited, through a fixing zone where an increased temperature and pressure serve to fix the image permanently to the recording medium.
  • contaminants e.g. in the form of residual marking substance material and/or debris originating from the recording medium and/or other impurities may build up on the surface of the image transfer member.
  • the recording medium is paper or a like fibrous material
  • debris in the form of dust and fibres may build up on the image transfer member surface in the region of the transfer zone. If these contaminants remain on the image transfer member surface, the efficiency of the image transfer and the quality of the fixing where applicable, may be affected. Hence, it is desirable to clean the image transfer member surface.
  • the image transfer member with the non-image toner pattern thereon passes the transfer zone while no recording medium is supplied and without urging the counter member against the image transfer member.
  • Another example of such system is disclosed in US 6,226,489 , where cleaning substance is also applied to the image transfer member when the transfer zone is opened.
  • the non-image toner pattern on the image transfer member is guided further towards the contact zone between the image transfer member and the cleaning member, i.e. the cleaning zone.
  • the cleaning zone i.e. the cleaning zone.
  • the periodic rejuvenation of the tacky surface layer described is found to lead to inconsistent cleaning characteristics caused by the reduction of the surface tackiness when proceeding in the operative state towards the next rejuvenation period. From this perspective, it seems beneficial to implement a high rejuvenation periodicity. However, as contrary to the operative state, in the rejuvenation stage no prints or copies are generated, a high rejuvenation periodicity is detrimental for the productivity of the image reproduction device. These conflicting requirements demand for a new approach for rejuvenating the tacky surface of the cleaning member.
  • the cleaning member and the counter member may be selectively movable into and out of contact with the image transfer member surface and may be independently driven. Alternately, these items can be driven by the movement of the image transfer member.
  • the image transfer member may be in the form of a drum or a belt and may be heated.
  • a first and second backing roller may be provided, the first backing roller cooperating with the cleaning member to form the cleaning zone through which the belt passes, the second backing roller contacting the back of the image transfer belt opposite the counter member such that in the transfer zone both the belt and the recording medium pass while pressure is exerted on at least one of the second backing roller and the counter member to define the contact.
  • the image transfer member typically has an outer layer of a silicone elastomer.
  • the counter member typically has an outer layer of a silicone elastomer, or a PTFE, or a fluororubber.
  • the outer layer of the counter member may be chosen such that it has a lower affinity to the cleaning substance than the outer layer of the image transfer member.
  • a cleaning member with a tacky surface may also be engaged in contact with the counter member.
  • the cleaning member usually is a cleaningroller.
  • the cleaning roller is located downstream of the transfer zone and upstream of any intermediate transfer zone where images of marking substance are transferred to the image transfer member directly from an image forming member or indirectly via one or more further image transfer members.
  • the kind of marking substance and image forming member which is used depends on the imaging technique used. Examples of imaging techniques include ink jet, electrography including electrophotograpy, and magnetography. Examples of marking substance include ink, dry particulate toner, and liquid toner. For instance in case of electrophotography, the marking substance may be a dry particulate toner, while the image forming member is a drum or a belt with a photoconductive outer layer whereon a latent image is formed and subsequently developed with toner.
  • the tacky surface layer material and the cleaning substance can be formed of polymeric material having good adhesive and adsorptive properties, especially at the operating temperatures of the image transfer member.
  • the cleaning substance comprises a polymer having a glass transition temperature below the temperature of the image transfer member at the cleaning zone.
  • Such polymeric material may be toner, as a toner typically comprises a thermoplastic binder consisting of a thermoplastic resin or mixture of resins including colouring matter, e.g. carbon black or colouring material such as finely dispersed pigments or soluble dyes.
  • the toner used as cleaning substance may be one of the toners used as marking substance for rendering the images. Alternately, it is also possible to use toner of a different composition as a cleaning substance, for example containing a lower level of colouring material, or even no colouring material at all.
  • the applicator unit may be a simple dosing unit, which is able to supply fresh cleaning substance at a controllable rate and dose on predetermined locations of the moving image transfer member according to a predetermined pattern.
  • An example of such dosing unit is a spray coating unit.
  • the applicator unit may be an image forming unit. In the latter case a predetermined pattern of cleaning substance is imaged directly on the image forming member in some or each of the non-image areas. Alternately, a latent image pattern is first formed on the image forming member and subsequently developed thereon.
  • the predetermined pattern of cleaning substance may be transferred in an intermediate transfer zone to the image transfer member directly from an image forming member or indirectly via one or more further intermediate image transfer members.
  • the image forming member may constitute the image transfer member.
  • the transferred pattern of cleaning substance present on the image transfer member passes the transfer zone.
  • the remaining part of the pattern of cleaning substance present on the image transfer member downstream of the transfer zone is transferred substantially completely to the cleaning member in the cleaning zone.
  • the cleaning member is a rotatable cleaning roller having a surface with a plurality of spaced-apart perforations therein for discharging any contaminants and excess cleaning substance assembled on the cleaning roller surface into a cavity in the cleaning roller.
  • the perforations may be in the form of grooves.
  • means are provided for synchronizing the position of the perforations in the cleaning member and the predetermined patterns of cleaning substance on the image transfer member to ensure that in the cleaning zone cleaning substance is only present on the image transfer member surface outside the perforations.
  • the means for synchronizing the position may include a position sensor for determining the axial position of the cleaning member.
  • the patterns of cleaning substance on the image transfer member are such that the portions of the image transfer member surface, covered by the patterns of cleaning substance, have an area coverage in the range from 1% to 30%. It is observed that by lowering the area coverage of the exposed portions, the transfer efficiency of cleaning substance to the counter member surface in the transfer zone can be effectively reduced.
  • the printing system comprises an image transfer member, which can be moved cyclically.
  • the image transfer member is an endless member, such as e.g. a drum or a belt.
  • the image transfer member is a cylindrical drum (1), which can be moved in the direction of arrow (3).
  • the image transfer member is constructed of a metal sleeve, e.g. aluminium, with an elastomeric covering (2).
  • the image transfer member may be provided with an outer layer of silicone rubber, e.g. by means of coating.
  • One or more process colours are available on the printing system dependent whether it concerns a monochrome or a multi-colour printing system.
  • an image forming unit (4)(5)(6) is disposed along the path of rotation of the intermediate transfer member.
  • Each of these image forming units comprises a cylindrical image forming member (7) on which a colour separation image of the corresponding process is formed.
  • the image forming members are all in pressure contact with the image transfer member, the force with which the image forming members are pressed against the image transfer member being at maximum 1000 N per linear meter, e.g. 250 N per linear meter.
  • Each image forming member is formed of a metal drum with a photo-conductive outer layer thereon, the various image forming devices being positioned along the circumference of the image forming member.
  • These image forming devices comprise a charging device (11), e.g.
  • a corona device e.g. a corona device
  • an exposing device (12) e.g. a LED array
  • a development device (13) for developing the latent image with marking substance
  • a cleaning device (14) for removing any residual marking substance present on the image forming member after transfer of the developed separation image to the image transfer member.
  • the development device is in this case a magnetic brush development device which comprises a magnetic roller (17) consisting of a rotatable sleeve with a stationary magnet system therein. The magnetic roller is positioned along the circumference of the image forming member with its surface at short distance from the image forming member surface without contacting it.
  • a reservoir (18) with electrically conductive magnetically attractable dry particulate toner is positioned near the surface of each of the magnetic rollers (17). Each reservoir contains toner in one of the process colours.
  • a stripper (19) is provided at each reservoir to ensure that an even layer of particulate toner is applied to the sleeve of the magnetic roller.
  • a rotatable counter roller (23) which is selectively movable towards and away from the image transfer member surface with controlled pressure. Means (not shown) are provided to drive this counter member.
  • This feed means consists of co-operating conveyor rollers (21) and a guide plate (22).
  • the sheet discharging means includes co-operating conveyor belts (24) (25).
  • a rotatable cleaning roller having a tacky surface.
  • the cleaning roller (30) may be driven by drive means (not shown) and is selectively movable into and out-of an operative position in which the cleaning member surface is in contact with the image transfer member surface.
  • a helical perforation is formed in the cleaning roller surface and extends to a cavity within the roller for discharging any contaminants and /or excess cleaning substance assembled on the roller surface therein. This helical perforation defines in the axial direction an alternating pattern of grooves and non-perforated areas, referred to as dams.
  • the width and pitch of the perforation is of importance as they determine the ratio between the cleaning area and the non-cleaning area of the roller. As cleaning is only performed in the dam area and not in the grooves, proper consideration should be given when determining these parameters. A large cleaning area is desirable but account should be taken of the fact that the contaminants and/or excess cleaning substance assembled on the cleaning roller surface dams must be able to reach the grooves. Hence, for instance the viscosity of the cleaning substance should be involved in this consideration.
  • a position sensor (not shown) is provided to detect the axial position and optionally also the radial position of the cleaning roller as well as control means (also not shown) for controlling the position of the cleaning roller responsive to the detected position.
  • the tackiness of the surface layer of the cleaning roller may be improved and the viscosity of the layer may be adjusted by heating the surface layer upstream of the cleaning zone.
  • a heating device may be provided for heating the cleaning substance on the cleaning roller surface to render the surface tacky prior to contact thereof with the transfer member surface.
  • the heating device may be in the form of a lamp located in the inner core of the roller.
  • external heating is preferred, for example by use of an external radiant heat source.
  • means are provided for controlling the heating of the toner particles, for example by the use of a heat sensor to sense the temperature of the cleaning member surface, this sensor being coupled to a control device for the heating device.
  • Heating the toner particles on the cleaning roller surface has several benefits.
  • the heating device can be energized selectively to control the temperature and tackiness of the cleaning roller surface. This is especially beneficial at start up where, in the absence of such a heating device, it would take a significant amount of time (and possibly wastage of receiving material) before the temperature equilibria would be reached.
  • a sequence of printing signals is generated. Responsive to this sequence of printing signals the printing system sequentially forms the respective separation images of marking substance of the corresponding process colour on the respective image forming members (7). In the respective pressure contact zones, the respective separation images are sequentially transferred in register to the image transfer member to thereby form a registered multi-colour image thereon.
  • the marking substance is toner in dry particulate form.
  • the registered multi-colour toner image on the image transfer member is heated by means known per se so that the toner softens and is rendered tacky.
  • the printing system is such that the respective separation images of marking particles are formed complementary.
  • marking particles of a process colour are accumulated on the free surface of the image-carrying member and substantially not on coloured marking particles already accumulated on the image-carrying member.
  • substantially not means that any superimposed marking particles of different process colours may not lead to visual deficiencies, i.e. visual with the naked human eye, in the finally printed image.
  • the printing system subsequently transfers the registered multi-colour toner image to a sheet of a recording medium which is controllably fed at the appropriate time by the conveyor rollers (21) through the transfer zone defined by establishing pressure contact between the rotating image transfer member and the rotating counter member.
  • the sheet carrying the printed image is subsequently discharged by the co-operating conveyor belts (24) and (25).
  • the image transfer member is further advanced towards the cleaning zone where any contaminants present on its surface may be removed by transferring them to the tacky surface of the rotating cleaning roller (30).
  • the printing job is defined such that the consecutive images are printed each on separate sheets fed in consecution through the transfer zone.
  • an inter-image area being the area between consecutive images carried on the image transfer member
  • an inter-sheet area being the distance between the associated consecutive sheets.
  • the part of the inter-image area coinciding with the inter-sheet area is referred to as the non-image area.
  • a predetermined pattern of cleaning substance is formed in the non-image area.
  • the toner preferably black toner when available, used to form this predetermined pattern constitutes the cleaning substance.
  • the image forming unit and the formation process of the predetermined pattern is controlled such that the transfer of the cleaning substance pattern to the image transfer member in the pressure contact zone is effected in the non-image area.
  • cleaning substance pattern in the non-image area reaches the transfer zone in the interval between two consecutive sheets, it can not be transferred to a sheet but instead will remain on the surface of the image transfer member or will be (partially) transferred to the counter member surface (23).
  • a pattern is selected which can be synchronised with the cleaning member using the cleaning roller position detection and controlling means such that cleaning substance is only present in the cleaning zone in the area coinciding with the dams of the cleaning roller.
  • a pattern is chosen having a dam width of about 1.1 mm which is well within the dam width of the cleaning roller.
  • the dams of the pattern constitute the portions of the image transfer member surface in the non-image area covered with cleaning substance, while the dam width of the pattern is the width of the covered portions in the non-image area.
  • a tacky surface cleaning roller (35) may also be provided to clean the counter member surface. Instead of providing the additional cleaning roller or in combination therewith, one can also opt to take appropriate measures to severely reduce or even nullify the transfer rate of cleaning substance to the counter member surface. One or these measures could be the use of a counter member surface layer having a lower affinity to cleaning substance compared to the image transfer member surface layer.
  • counter member surface layers are polyorganosiloxane layers, in particular the ones disclosed in EP0349072 (Schoustra et al., Océ Technologies B.V.). Instead or in addition to this measure, on could also opt to lower the area coverage of the portions of the image transfer member surface in the non-image area covered by the patterns of cleaning substance as it has been observed that this is beneficial to reduce the transfer rate of cleaning substance to the counter member surface.
  • the area coverage may be chosen typically in the range from 1% to 30%, or from 1% to 10%, or from 1% to 5%.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)

Claims (10)

  1. Dispositif de transfert d'images pour transférer des images d'une substance de marquage à des feuilles d'un support d'enregistrement, le dispositif comprenant :
    un élément de transfert d'images sans fin (1) pour recevoir des images consécutives d'une substance de marquage sur sa surface, l'élément de transfert d'images (1) étant configuré pour, dans un état opératoire du dispositif de transfert, être pressé en contact mobile avec un élément compteur (23) pour former une zone de transfert entre eux afin de transférer les images consécutives respectives à des feuilles respectives d'un support d'enregistrement acheminé de manière consécutive à travers la zone de transfert ; et
    un rouleau de nettoyage rotatif (30) ayant une surface et étant configuré pour, dans un état opératoire du dispositif de transfert d'images, avoir une couche de surface de substance de nettoyage collante sur la surface, laquelle couche de surface de substance de nettoyage collante est en contact mobile avec la surface (2) de l'élément de transfert d'images (1) dans une zone de nettoyage situé en aval de la zone de transfert ;
    dans lequel le dispositif comprend en outre
    une unité d'application réglable configurée pour, dans un état opératoire du dispositif de transfert d'images, fournir des motifs prédéterminés d'une substance de nettoyage à la surface (2) de l'élément de transfert d'images (1), lesdits motifs étant configurés pour maintenir la couche collante sur la surface du rouleau de nettoyage,
    caractérisé en ce que l'unité d'application réglable est à même de fournir, dans un état opératoire du dispositif de transfert d'images, les motifs prédéterminés de substance de nettoyage à la surface (2) de l'élément de transfert d'images (1) en amont de la zone de transfert dans au moins certaines régions sans image, qui sont les régions entre des images consécutives coïncidant avec les régions entre des feuilles consécutives, les motifs prédéterminés de substance nettoyante sur l'élément de transfert d'images (1) pouvant être guidés à travers la zone de transfert, tandis que l'élément de transfert d'images (1) est pressé en contact contre l'élément opposant (23), vers la zone de nettoyage où les motifs prédéterminés de substance de nettoyage restants sur l'élément de transfert d'images, avant d'être guidés dans la zone de nettoyage, sont transférés sensiblement complètement à la surface du rouleau de nettoyage (30) dans la zone de nettoyage.
  2. Dispositif de transfert d'images selon la revendication 1, dans lequel le rouleau de nettoyage (30) a une surface présentant une pluralité de perforations espacées l'une de l'autre pour décharger tous contaminants et l'excès de substance de nettoyage ramassés sur la surface du rouleau de nettoyage.
  3. Dispositif de transfert d'images selon la revendication 2, dans lequel les perforations sont des rainures.
  4. Dispositif de transfert d'images selon les revendications 2 et 3, comprenant en outre des moyens pour synchroniser la position des perforations et des motifs prédéterminés de substance de nettoyage pour s'assurer que, dans la zone de nettoyage, la substance de nettoyage soit seulement présente sur l'élément de transfert d'images à l'extérieur des perforations.
  5. Dispositif de transfert d'images selon la revendication 4, dans lequel lesdits moyens pour synchroniser la position comprennent un capteur de position pour déterminer la position axiale du rouleau de nettoyage (30).
  6. Dispositif de transfert d'images selon l'une quelconque des revendications précédentes, dans lequel les portions de la surface de l'élément de transfert d'images, recouvertes par les motifs de substance de nettoyage, ont une couverture de surface dans la plage de 1 % à 30 %.
  7. Dispositif de transfert d'images selon l'une quelconque des revendications précédentes, dans lequel l'élément opposant (23) a une couche externe d'un élastomère de silicone ou d'un PTFE ou d'un caoutchouc fluoré, et l'élément de transfert d'images a une couche externe d'un élastomère de silicone.
  8. Dispositif de transfert d'images selon l'une quelconque des revendications précédentes, dans lequel ladite substance de nettoyage comprend un polymère ayant une température de transition vitreuse en dessous de la température de la surface de l'élément de transfert d'images sur la zone de nettoyage.
  9. Procédé d'élimination de contaminants de la surface d'un élément de transfert d'images sans fin d'un dispositif de transfert d'images, dans lequel, en service, l'élément de transfert d'images sans fin (1) est pressé en contact avec un élément opposant pour former une zone de transfert entre eux à travers laquelle des feuilles consécutives d'un support d'enregistrement sont acheminées, le procédé comprenant les étapes consistant à :
    mettre en contact la surface de l'élément de transfert d'images (2) sur une zone de nettoyage en aval de la zone de transfert avec un rouleau de nettoyage rotatif (30) ayant une couche de surface collante de substance de nettoyage sur la surface,
    laquelle couche de surface collante de substance de nettoyage est en contact mobile avec la surface de l'élément de transfert d'images, pour transférer ainsi des contaminants de l'élément de transfert d'images à la surface collante ;
    recevoir des images consécutives d'une substance de marquage sur l'élément de transfert d'images (1);
    et
    recevoir des motifs d'une substance de nettoyage sur l'élément de transfert d'images (1) ;
    caractérisé en ce que les motifs de la substance de nettoyage, lesdits motifs étant configurés pour maintenir la couche collante sur la surface du rouleau de nettoyage,
    sont reçus sur l'élément de transfert d'images (1) dans au moins certaines régions sans image, les régions sans image étant les régions entre les images consécutives coïncidant avec les régions entre des feuilles consécutives, le procédé comprenant en outre le guidage de l'élément de transfert d'images via la zone de transfert, où les images consécutives respectives sont transférées aux feuilles respectives, à la zone de nettoyage où les motifs sans image de la substance de nettoyage restant sur l'élément de transfert d'images (1) avant d'être guidés vers la zone de nettoyage sont transférés sensiblement complètement à la surface de l'élément de nettoyage.
  10. Appareil d'impression à jet d'encre comprenant un dispositif de transfert d'images selon la revendication 1.
EP20050107553 2004-09-01 2005-08-17 Elément de transfert intermédiare avec un élément de nettoyage Not-in-force EP1632821B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20050107553 EP1632821B1 (fr) 2004-09-01 2005-08-17 Elément de transfert intermédiare avec un élément de nettoyage

Applications Claiming Priority (2)

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EP04077445 2004-09-01
EP20050107553 EP1632821B1 (fr) 2004-09-01 2005-08-17 Elément de transfert intermédiare avec un élément de nettoyage

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EP1632821A1 EP1632821A1 (fr) 2006-03-08
EP1632821B1 true EP1632821B1 (fr) 2012-05-30

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2120102A1 (fr) 2008-05-15 2009-11-18 Océ-Technologies B.V. Procédé de nettoyage pour un support d'image de toner
EP3769158B1 (fr) 2018-03-21 2024-02-28 Hewlett-Packard Development Company, L.P. Surfaces de nettoyage pour appareil d'impression

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8304099A (nl) * 1983-11-30 1985-06-17 Oce Nederland Bv Contactfixeerinrichting.
NL8501321A (nl) 1985-05-09 1986-12-01 Oce Nederland B V Patents And Werkwijze voor het bepalen van het moment waarop verversing van een laag klevend materiaal op een reinigingsorgaan noodzakelijk is, en inrichting voor het uitvoeren van deze werkwijze.
NL8801669A (nl) 1988-07-01 1990-02-01 Oce Nederland Bv Inrichting voor het fixeren of transfereren en fixeren van thermoplastische hars bevattend poeder op een ontvangstmateriaal.
DE19726146A1 (de) 1997-06-19 1998-12-24 Basf Ag Neue ß-Amino und ß-Azidopcarbonsäurederivate, ihre Herstellung und Verwendung als Endothelinrezeptorantagonisten
GB2345880A (en) 1999-01-23 2000-07-26 Xeikon Nv Cleaner for fixing device

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