EP1761826A1 - Procede pour traiter la surface d'un cylindre transportant un toner dans un dispositif d'impression ou de reproduction electrographique - Google Patents

Procede pour traiter la surface d'un cylindre transportant un toner dans un dispositif d'impression ou de reproduction electrographique

Info

Publication number
EP1761826A1
EP1761826A1 EP05769684A EP05769684A EP1761826A1 EP 1761826 A1 EP1761826 A1 EP 1761826A1 EP 05769684 A EP05769684 A EP 05769684A EP 05769684 A EP05769684 A EP 05769684A EP 1761826 A1 EP1761826 A1 EP 1761826A1
Authority
EP
European Patent Office
Prior art keywords
roller
toner
cleaning
ceramic layer
electrographic printing
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Withdrawn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
EP05769684A
Other languages
German (de)
English (en)
Inventor
René FRÖSCHL
Herbert Heimpoldinger
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 EP1761826A1 publication Critical patent/EP1761826A1/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Withdrawn legal-status Critical Current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
    • G03G15/0815—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 handling means after the developing zone and before the supply, e.g. developer recovering roller

Definitions

  • FIG. 1 shows a schematic arrangement of the components used for the operation.
  • a charge image carrier 1 (in FIG. 1 a photoconductor drum, likewise the intermediate carrier can be a photoconductor belt) moves at a constant speed past the components 2-7, 10-14.
  • the charge image carrier 1 is charged by a charging corotron 2.
  • the image to be printed is generated with sharply focused light as a charge image by a character generator 3 on the charge image carrier 1.
  • the charge image is colored with toner in a developer station 4.
  • the developer station 4 has at least one device for transporting the toner, which transports the developer 5 consisting of toner and a carrier (carrier) to the charge image carrier 1.
  • the toner is transferred to the charge carrier 1 in the gap between developer station 4 and charge image carrier 1 in accordance with the charge images.
  • the toner image is transferred to a recording medium 8, eg paper, in a transfer station 6, for example with the aid of a transfer corotron 7, and then fixed in a fixing station 9 (not shown).
  • a recording medium 8 eg paper
  • a transfer station 6 for example with the aid of a transfer corotron 7, and then fixed in a fixing station 9 (not shown).
  • On closing the charge image carrier 1 is neutralized electrostatically with a Korotron 10.
  • the residual toner still adhering to the charge image carrier 1 is removed for a new image cycle by means of a cleaning device 11, for example a cleaning brush 12 and suction unit 13.
  • the charge image carrier 1 is illuminated by a discharge lamp 14 to improve its long-term behavior.
  • the charge image carrier 1 is prepared for a new printing cycle.
  • FIG. 2 an example of a conventional developer station 4 is shown, which contains a device 15 for transporting toner to a charge image carrier 1.
  • the device for transporting the toner is realized in FIG. 2 as a magnetic roller 16 with a rotating roller 17, which has an electrically conductive roller sleeve 22, on which the developer 5 adheres, and with a magnet system 18 arranged in the interior Winder 5 is mixed in the developer station 4, while the toner charges triboelectrically by friction.
  • the developer Corresponding to the magnetic field lines of the magnet system 18, the developer then forms chains 19 which bridge the developer gap 20 and contact the charge image carrier 1.
  • the toner Due to the charge of the charge image carrier 1 and the potential difference between the charge image carrier 1 and the magnetic roller 16, the toner is released from the carrier and passes onto the charge carrier 1. By contrast, the carrier falls back into the developer station 4. By a scraper 21, the height of the developer 5 is set on the roller sleeve 22.
  • Another developer station can be found in DE 101 52 892.2.
  • a charged toner is moved past a charge applicator roller past a tensioning applicator roller, thereby dyeing charge images on the charge carrier.
  • a magnetic roller is provided as an example of a device for transporting toner to a charge image carrier.
  • it can also be a further magnetic roller which conveys developer to a magnetic roller or to an applicator roller according to DE 101 52 892.2.
  • the device can also be used for cleaning a charge image carrier, a toner-transporting roll or an applicator roll. The following is therefore for all applications Cases of the device summarized by a Toner ⁇ annealing unit spoken.
  • the toner attachment units used in electrophotographic printing devices thus have, as shown in FIG. 2, at least one roller 17 with a sleeve (roller sleeve 22) on which the toner adheres.
  • they are subject to an undesired toner deposition process on the roll shell, with the result that the transport of toner is adversely affected.
  • DE 101 52 892.2 deals primarily with a cleaning roller with which the toner remaining from the surface of an applicator roller is cleaned after development.
  • This cleaning roller has a tube made of CrNi as a roller shell, on which a ceramic layer is applied, which is coated with Teflon.
  • the Teflon coating is applied to the roll shell in an aqueous solution and by mechanical densification.
  • the object of the teflon layer is, on the one hand, to prevent adhesion and sealing of the toner in the ceramic layer by toner, and on the other hand, it is intended as a protection against contact and handling of the ceramic layer.
  • the application of the Teflon layer requires a complex manufacturing process in which the individual components must be thoroughly mixed. In a not exactly kept production process, it may already be in the Switch-on phase of the developer station to cleaning problems such as the applicator come.
  • the problem to be solved by the invention is to provide a method by which a toner-carrying roller, e.g. a cleaning roller in a developer station ei ⁇ ner electrographic printing or copying device can be maraf ⁇ fen, in which toner particles can not settle in the Tä ⁇ learning the ceramic layer, also the electrical see or thermal properties are more uniform on the surface of the roll shell ,
  • the surface of the roll shell thus the Ke ⁇ ramik für, processed again by irradiation by a blasting material.
  • the surface of the ceramic layer is cleaned of scalings, oxidation layers and dirt particles.
  • the surface of the ceramic layer is mechanically densified.
  • the toner particles can not settle in the depressions or valleys of the ceramic layer, but can detach themselves over and over again.
  • the electrical and thermal conductivity on the surface of the roller becomes more uniform. The result is a significantly improved cleaning behavior in relation to the toner adsorption unit, in particular also in the switching-on phase of the developer station.
  • glass beads are used as blasting material. These may have a diameter which is in the range of about 100 to 200 microns.
  • a radiation source for the blasting material can be arranged approximately 30 mm away from the roller. The result is particularly good when the glass balls impinge on the surface of the roller with a jet pressure of approx. 2 bar.
  • Plasma coating can be used as the method for applying the ceramic layer.
  • the roller may have a CrNi tube.
  • the roller according to the invention is particularly suitable as a cleaning roller for cleaning a toner adsorption unit, in particular an applicator roller, which transports toner past a charge image carrier during development of the charge images.
  • FIG. 3 shows, in principle, a section of a developing station corresponding to DE 101 52 892.2, which shows an applicator roller 30 and a cleaning roller 31 arranged adjacent to the applicator roller 30.
  • the applicator roller 30 transports toner to a charge image carrier (not shown). provides).
  • the residual toner not transferred to the charge image carrier must now be cleaned off from the applicator roller 30 by the cleaning roller 31.
  • the cleaning roller 31 can be provided with a magnet system 32, furthermore, a potential difference between applicator roller 30 and cleaning roller 31 can be provided.
  • the residual toner is then supported by the magnet system 32 and the potential on the cleaning roller 31 via.
  • the cleaning roller 31 has a tube 33 as a roller shell, for example of CrNi, which is covered with a ceramic layer 34.
  • the surface of the ceramic layer 34 is now treated according to the above-described method be ⁇ that the toner easily dissolves from the surface of the cleaning roller 31.

Landscapes

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

Abstract

L'invention vise à concevoir la surface d'un cylindre transportant un toner, notamment d'un cylindre nettoyant (31) pour un cylindre d'application (cylindre de développement) dans le poste de développement d'un dispositif d'impression ou de reproduction, de sorte que le toner puisse être dissous aisément de la surface. A cet effet, la surface (33) du cylindre (31) est revêtue d'une couche céramique (34), qui est ensuite exposée à l'action d'un produit projeté, notamment des billes de verre. Ce procédé permet d'éliminer de la couche céramique, des dépôts de calamine, des couches d'oxydation et des impuretés et de les recomprimer. Une adhérence indésirable du toner sur la couche céramique est évitée, sans qu'il soit nécessaire d'appliquer une couche de Téflon.
EP05769684A 2004-06-25 2005-06-24 Procede pour traiter la surface d'un cylindre transportant un toner dans un dispositif d'impression ou de reproduction electrographique Withdrawn EP1761826A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004030863A DE102004030863A1 (de) 2004-06-25 2004-06-25 Verfahren zur Behandlung der Oberfläche einer Toner transportierenden Walze bei einer elektrografischen Druck- oder Kopiereinrichtung
PCT/EP2005/006854 WO2006000435A1 (fr) 2004-06-25 2005-06-24 Procede pour traiter la surface d'un cylindre transportant un toner dans un dispositif d'impression ou de reproduction electrographique

Publications (1)

Publication Number Publication Date
EP1761826A1 true EP1761826A1 (fr) 2007-03-14

Family

ID=35033503

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05769684A Withdrawn EP1761826A1 (fr) 2004-06-25 2005-06-24 Procede pour traiter la surface d'un cylindre transportant un toner dans un dispositif d'impression ou de reproduction electrographique

Country Status (4)

Country Link
US (1) US20070223973A1 (fr)
EP (1) EP1761826A1 (fr)
DE (1) DE102004030863A1 (fr)
WO (1) WO2006000435A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008003817A1 (de) * 2008-01-10 2009-07-23 OCé PRINTING SYSTEMS GMBH Verfahren zum Herstellen einer Tonerwalze mit einer Oxidkeramikschicht
DE102009010624B4 (de) * 2009-02-26 2015-08-13 Océ Printing Systems GmbH & Co. KG Tonerwalze
DE102009037735A1 (de) * 2009-08-17 2011-02-24 OCé PRINTING SYSTEMS GMBH Reinigungseinrichtung für eine Entwicklerwalze bei einem elektrografischen Druck- oder Kopiergerät
CN113117959B (zh) * 2021-05-14 2024-11-01 江苏连港皮革机械有限公司 陶瓷涂层涂饰辊
DE102021208973A1 (de) * 2021-08-16 2023-02-16 HPL Technologies GmbH Fertigungsverfahren für ein Werkstück mit einer Veredelungsschicht, sowie ein Werkstück mit einer Veredelungsschicht

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS597384A (ja) * 1982-07-05 1984-01-14 Canon Inc 現像装置
US4769676A (en) * 1986-03-04 1988-09-06 Kabushiki Kaisha Toshiba Image forming apparatus including means for removing residual toner
JP2692935B2 (ja) * 1988-02-29 1997-12-17 キヤノン株式会社 画像形成方法及び画像形成装置
US5227849A (en) * 1989-07-03 1993-07-13 Canon Kabushiki Kaisha Developing apparatus and developer carrying member usable therewith
US5344494A (en) * 1993-01-21 1994-09-06 Smith & Nephew Richards, Inc. Method for cleaning porous and roughened surfaces on medical implants
JPH08272281A (ja) * 1995-03-30 1996-10-18 Canon Inc プロセスカートリッジ及び画像形成装置
JPH10177303A (ja) * 1996-12-17 1998-06-30 Fuji Xerox Co Ltd 現像スリーブ及び画像形成方法
US6327452B1 (en) * 2000-02-14 2001-12-04 Xerox Corporation Donor rolls and methods of making donor rolls
WO2002024605A1 (fr) * 2000-09-21 2002-03-28 Sintokogio, Ltd. Procede pour renforcer une ceramique et produit ceramique
DE10213499B4 (de) * 2002-03-26 2005-02-03 OCé PRINTING SYSTEMS GMBH Vorrichtung zum Transport von Toner bei einer elektrofotografischen Druck- oder Kopiereinrichtung
EP1564604B1 (fr) * 2004-02-16 2013-06-19 Ricoh Company, Ltd. Appareil de fixation avec élément de nettoyage et appareil de formation d'images
JP5125023B2 (ja) * 2006-08-09 2013-01-23 富士ゼロックス株式会社 クリーニング装置および画像形成装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006000435A1 *

Also Published As

Publication number Publication date
WO2006000435A1 (fr) 2006-01-05
DE102004030863A1 (de) 2006-01-19
US20070223973A1 (en) 2007-09-27

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