EP2041628A1 - Station de développement avec dispositif à lisser et procédé d'exploitation d'une station de développement - Google Patents

Station de développement avec dispositif à lisser et procédé d'exploitation d'une station de développement

Info

Publication number
EP2041628A1
EP2041628A1 EP07787036A EP07787036A EP2041628A1 EP 2041628 A1 EP2041628 A1 EP 2041628A1 EP 07787036 A EP07787036 A EP 07787036A EP 07787036 A EP07787036 A EP 07787036A EP 2041628 A1 EP2041628 A1 EP 2041628A1
Authority
EP
European Patent Office
Prior art keywords
developer
roller
toner particles
developer station
smoothing
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.)
Withdrawn
Application number
EP07787036A
Other languages
German (de)
English (en)
Inventor
Ralf Selinger
Florian KÖFFERLEIN
Admir Lela
Uwe HÖLLIG
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 Germany GmbH and Co KG
Original Assignee
Oce Printing Systems GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oce Printing Systems GmbH and Co KG filed Critical Oce Printing Systems GmbH and Co KG
Publication of EP2041628A1 publication Critical patent/EP2041628A1/fr
Withdrawn legal-status Critical Current

Links

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
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0806—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller
    • G03G15/0812—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller characterised by the developer regulating means, e.g. structure of doctor blade
    • 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
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/09—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush
    • 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
    • G03G2215/06—Developing structures, details
    • G03G2215/0602—Developer
    • G03G2215/0604—Developer solid type
    • G03G2215/0607—Developer solid type two-component
    • G03G2215/0609—Developer solid type two-component magnetic brush
    • 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
    • G03G2215/06—Developing structures, details
    • G03G2215/0634—Developing device

Definitions

  • the invention relates to a developer station for a printer or copier, comprising a rotating developer roller which can be fed to toner particles which are deposited on the surface of the developer roller and which are subsequently transferable in a transfer zone to a further rotating roller or belt. Furthermore, the invention relates to a method for this purpose.
  • Electrographic printers or copiers use image development techniques that deposit electrostatic charge images on surfaces, e.g. Charge charge images onto a photoconductor, across an air gap, or in direct contact with toner particles. These toner particles are located on a developer roller, which they transfer directly to a cylindrical photoconductor or an endless belt, or they are transferred from the developer roller to another roller or endless belt, from which the ink image on the photoconductor is then colored as an intermediate image carrier becomes. The toner image present on the intermediate image carrier is then applied to a print carrier, e.g. Paper, transferred and fixed.
  • a print carrier e.g. Paper
  • a smoothing device is arranged in the direction of rotation of the developer roller in front of the transfer zone, the smooth element of which is subjected to a mechanical pretension in the quiescent state.
  • This mechanical bias exerts pressure on the surface of the toner layer over the entire width of the toner layer in the width direction of the developer roller, so that the toner layer is leveled and smoothed.
  • irregularities in the toner layer are removed immediately before the transfer zone or one-ink zone, so that in the transfer zone of the further rotating roller or endless belt, a toner layer uniform over the width of the developer roller is presented and the toner particles are uniformly applied to the further rotating roller or roller the endless belt can be transmitted.
  • the homogeneous toner layer achieved by the smoothing device ensures in the further process a uniform coloring of the charge image and thus a high print quality.
  • Printing or Kopiergeraten be used whose recording method for image generation in particular on the based on electrophotographic, magnetographic or ionographic recording principle. Further, the printing or copying apparatuses can use a recording method for image formation, in which an image recording medium is directly or indirectly electrically driven pointwise. However, the invention is not limited to such electrostatic printing or copying machines.
  • Figure 2 shows an embodiment with a cylindrical smoothing element
  • Figure 3 shows an embodiment with an im
  • FIG. 1 shows schematically in a cross-section a detail of a developer station 10.
  • a developer roller 12 which rotates in the direction of the arrow P1, contains in its interior a magnet stator with a plurality of magnets 16, 18, 20, 22, 24, whose magnetic axes, for example radially are directed outside and whose magnetic fields the penetrate hollow developer roller 12. The polarity of the poles of the magnets 16 to 24 alternate in the direction of rotation.
  • a particle mixture of electrically charged toner particles and ferromagnetic carrier particles, a so-called two-component mixture 26, is supplied to the developer roller 12 from a supply via blade wheels (not shown).
  • the developer roller 12 serves in a printer or copier for transporting the toner particles to a further roller 28, where only the toner particles in a transfer zone 30 are transferred to the surface of the further roller 28. Between the developer roller 12 and the further roller 28, a developer gap with a predetermined width is present in the region of the transfer zone 30.
  • the further roller 28 may already be an intermediate image carrier, for example a photoconductor roller whose
  • the further roller may be an applicator element, which in turn is provided with a gleichoniaigen toner layer on its surface. This toner layer is then transferred in a further transfer zone to an intermediate image carrier for inking the charge image.
  • the further roller 28 may also be provided an endless belt.
  • a magnetic brush is formed in the radial direction of the developer roller 12, since the ferromagnetic carrier particles are arranged and aligned along the magnetic field lines as a result of the force effect of the magnetic fields.
  • Such a protruding collection of carrier particles and toner particles is called a magnetic brush due to the brush-like shape.
  • a rigid housing wall 32 of the developer station 10 contains a squeegee device 33, which defines the layer thickness of the magnetic brush.
  • a smoothing device 34 comprises a rigid holder 36 and a smoothing element 38.
  • the holder 36 is fixedly connected to the housing part 32.
  • the smoothing element 38 is connected to the distal end of the holder 36 elastically or resiliently.
  • a thin metal strip having a thickness of 50 to 150 ⁇ m, preferably 90 to 110 ⁇ m, is used as the smoothing element 38.
  • the metal strip 38 is rectangular in cross-section and runs in the width direction of the developer roller 12 over the entire width of the
  • Developer roller 12 and thus completely covers the toner layer or the mixed toner carpet.
  • the metal strip 12 itself is again ferromagnetic and is acted upon by the magnetic field of the magnets 24 and 16 with a mechanical bias.
  • the metal band 38 presses against the layer of the two-component mixture 26 and smoothes the toner carpet or magnetic brush.
  • the metal strip 38 is pulled over the entire width of the developer roller 12 with a constant force to the magnetic brush.
  • the existing magnetic forces of the magnets, in particular the magnets 24 and 16 produce a constant pressure even when the surface of the developer roller 12 is not running smoothly. That way
  • the smoothing system thus largely regulates itself and allows a constant pressure of the hard or soft magnetic smoothing element 38, without an adjustment of this Glättelements 38 is required. It can also be do not lead to a jam of the two-component mixture, since the smooth element 38 continues to rise with increasing pressure of the two-component mixture 26.
  • a non-magnetic metal band may also be used. It is advantageous if the contact pressure or the mechanical preload are generated by means of springs or an elastic element.
  • Figure 2 shows a further exemplary embodiment, in which a smooth element 40 is cylindrical. It is also conceivable a rohrformige arrangement. Again, the smooth element 40 may be hard or soft magnetic, so that the mechanical bias is generated by magnetic forces. However, it is also possible that the bias voltage is generated by the weight of the smooth element 40.
  • FIG. 3 shows a further exemplary embodiment in which a smooth element 42 is triangular in cross section and has a constant cross section along the width of the developer roller 12. The apex of the triangle points in the tangential direction of the developer roller 12.
  • the end of the smooth elements 38, 40, 42 should be arranged as close as possible to the transfer zone 30, preferably the distal end of the smooth element 38, 40, 42 should extend to the gap between the developer roller 12 and further roller 28. This ensures that, due to the inhomogeneity of the magnetic fields, irregularities in the magnetic brush in the region of the transfer zone 30 can again form.
  • the discharge of carrier particles and toner particles is reduced by the smooth element 38, 40, 42 arranged directly in front of the transfer zone 30.
  • the respective smoothing element 38, 40, 42 has a low-wear or wear-resistant coating, at least on the side facing the toner layer.
  • a wear-resistant coating can be a hard chromium plated coating, a ceramic
  • Coating or a plasma coating For example, as a wear-resistant coating, a titanium oxide layer may be provided, which is preferably applied by a plasma coating.
  • a toner system without ferromagnetic carrier particles can also be used.
  • the smoothing device 34 also in this case causes the formation of a homogeneous, smoothed toner carpet in the inking zone.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Dry Development In Electrophotography (AREA)
  • Magnetic Brush Developing In Electrophotography (AREA)

Abstract

L'invention concerne une station de développement et un procédé d'exploitation d'une station de développement, des particules de toner étant amenées à un rouleau de développement rotatif (12). Un dispositif à lisser (34) comprenant un élément à lisser (38) est disposé devant une zone de transition (30). L'élément à lisser (34) est chargé par une précontrainte mécanique et exerce une pression sur toute la largeur de la couche de toner, ce qui entraîne le lissage de la couche avec les particules de toner avant le transfert des particules de toner sur un autre rouleau (28).
EP07787036A 2006-07-10 2007-07-04 Station de développement avec dispositif à lisser et procédé d'exploitation d'une station de développement Withdrawn EP2041628A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006031876A DE102006031876A1 (de) 2006-07-10 2006-07-10 Entwicklerstation mit Glättvorrichtung und Verfahren zum Betreiben einer Entwicklerstation
PCT/EP2007/056720 WO2008006747A1 (fr) 2006-07-10 2007-07-04 Station de développement avec dispositif à lisser et procédé d'exploitation d'une station de développement

Publications (1)

Publication Number Publication Date
EP2041628A1 true EP2041628A1 (fr) 2009-04-01

Family

ID=38461041

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07787036A Withdrawn EP2041628A1 (fr) 2006-07-10 2007-07-04 Station de développement avec dispositif à lisser et procédé d'exploitation d'une station de développement

Country Status (5)

Country Link
US (1) US7865117B2 (fr)
EP (1) EP2041628A1 (fr)
JP (1) JP2009543146A (fr)
DE (1) DE102006031876A1 (fr)
WO (1) WO2008006747A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009012759A1 (de) 2009-03-12 2010-09-16 OCé PRINTING SYSTEMS GMBH Anordnung für ein bewegtes zu reinigendes Element bei einem elektrografischen Druckgerät
JP5633156B2 (ja) * 2010-02-24 2014-12-03 富士ゼロックス株式会社 現像装置及び画像形成装置
JP2013092604A (ja) * 2011-10-25 2013-05-16 Fuji Xerox Co Ltd 現像装置及び画像形成装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4226524A (en) * 1977-11-19 1980-10-07 Ricoh Company, Ltd. Magnetic brush development apparatus for an electrostatic copier
US5863329A (en) * 1996-06-25 1999-01-26 Kyocera Corporation Ceramic composite doctor blade

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3118995C2 (de) 1981-05-13 1983-02-03 Siemens AG, 1000 Berlin und 8000 München Vorrichtung zur Einstellung der Höhe eines aus Toner und Trägerteilchen bestehenden Entwicklergemisches auf einer Entwicklerwalze
DE3462633D1 (en) * 1983-09-30 1987-04-16 Toshiba Kk Developing apparatus
US4656365A (en) 1985-07-12 1987-04-07 Westinghouse Electric Corp. Solid state power controller leakage current shunt circuit
EP0394228B1 (fr) 1988-03-04 1991-07-17 Siemens Nixdorf Informationssysteme Aktiengesellschaft Station de developpement pour une machine electrophotographique a imprimer ou a copier avec un dispositif empechant l'entrainement du melange
US4990958A (en) * 1989-12-26 1991-02-05 Xerox Corporation Reload member for a single component development housing
JPH04204962A (ja) * 1990-11-30 1992-07-27 Konica Corp 現像剤層の形成方法
JPH0511600A (ja) * 1991-07-06 1993-01-22 Fujitsu Ltd 一成分現像剤を使用する静電記録装置
US5625438A (en) 1994-05-12 1997-04-29 Ricoh Company, Ltd. Toner, and devices for electrostatically depositing a uniform application thereof
CN1120387C (zh) * 1998-01-21 2003-09-03 松下电器产业株式会社 显影装置及其制造方法
JP3609974B2 (ja) * 2000-02-14 2005-01-12 コニカミノルタビジネステクノロジーズ株式会社 一成分フルカラー現像方法
DE10152892A1 (de) 2001-10-26 2003-05-08 Oce Printing Systems Gmbh Verfahren und Vorrichtung zur Reinigung von Trägerelementen in Druckern oder Kopierern unter Anwendung von Magnetfeldern

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4226524A (en) * 1977-11-19 1980-10-07 Ricoh Company, Ltd. Magnetic brush development apparatus for an electrostatic copier
US5863329A (en) * 1996-06-25 1999-01-26 Kyocera Corporation Ceramic composite doctor blade

Also Published As

Publication number Publication date
US7865117B2 (en) 2011-01-04
DE102006031876A1 (de) 2008-01-17
WO2008006747A1 (fr) 2008-01-17
US20090279922A1 (en) 2009-11-12
JP2009543146A (ja) 2009-12-03

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