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WO1990011553A1 - Dispositif de nettoyage du support intermediaire d'une imprimante ou d'un copieur electrophotographiques - Google Patents

Dispositif de nettoyage du support intermediaire d'une imprimante ou d'un copieur electrophotographiques Download PDF

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Publication number
WO1990011553A1
WO1990011553A1 PCT/EP1990/000271 EP9000271W WO9011553A1 WO 1990011553 A1 WO1990011553 A1 WO 1990011553A1 EP 9000271 W EP9000271 W EP 9000271W WO 9011553 A1 WO9011553 A1 WO 9011553A1
Authority
WO
WIPO (PCT)
Prior art keywords
toner
cleaning
stripping element
intermediate carrier
stripping
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.)
Ceased
Application number
PCT/EP1990/000271
Other languages
German (de)
English (en)
Inventor
Karl Heigl
Dieter Sander
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.)
Siemens AG
Wincor Nixdorf International GmbH
Siemens Corp
Original Assignee
Siemens AG
Siemens Nixdorf Informationssysteme AG
Siemens Corp
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 Siemens AG, Siemens Nixdorf Informationssysteme AG, Siemens Corp filed Critical Siemens AG
Priority to DE9090903019T priority Critical patent/DE59000554D1/de
Publication of WO1990011553A1 publication Critical patent/WO1990011553A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/0005—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge for removing solid developer or debris from the electrographic recording medium
    • G03G21/007—Arrangement or disposition of parts of the cleaning unit
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/0005—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge for removing solid developer or debris from the electrographic recording medium
    • G03G21/0011—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge for removing solid developer or debris from the electrographic recording medium using a blade; Details of cleaning blades, e.g. blade shape, layer forming
    • G03G21/0029—Details relating to the blade support

Definitions

  • charge images are placed on an intermediate carrier, e.g. generated by a photoconductor drum and then colored with a developer mixture in a developer station.
  • the colored charge images are transferred to a recording medium in the form of single sheets or continuous paper in a transfer printing station and thermally or chemically fixed.
  • a two-component developer mixture consisting of ferromagnetic carrier particles and toner particles is used for development.
  • the developer mixture is e.g. transported by means of a magnetic brush or roller arrangement from a storage area into a developer area and guided there past the intermediate carrier to which the toner particles remain adhered due to electrostatic forces.
  • the backflowing mixture is then enriched from a toner reservoir with new toner before it flows back into the mixture circuit in the developer station.
  • a cleaning station is provided downstream of the transfer station in the direction of movement of the intermediate carrier and removes the toner and paper particles still adhering to the intermediate carrier after transfer printing. These particles are transported to a container by a device's own conveyor system.
  • Usual cleaning devices such as are known, for example, from DE-PS 33 09 269, contain an elastic scraper strip which bears against the intermediate carrier in the operating state of the cleaning device and scrapes off the residual toner from the intermediate carrier.
  • the residual toner is used in parallel with the Squeegee extending toner conveyor removed from the cleaning device.
  • a vibrating device can be provided as the conveying device, for example, which swings the conveying path back and forth with different acceleration values, so that the toner is moved in one direction.
  • the squeegee is fixed in the cleaning device, for example by means of screws.
  • the object of the invention is to provide a cleaning device of the type mentioned in such a way that, in order to avoid long-term pressure interruptions, the essential elements are designed as wear elements and can be replaced in a simple and ergonomic manner by the operator of the device. Nevertheless, an optimal sealing of the entire cleaning device with trouble-free removal of the toner should be ensured.
  • This object is achieved in a cleaning device of the type mentioned at the outset according to the characterizing part of the first claim.
  • Advantageous embodiments of the invention are characterized in the subclaims.
  • the cleaning device has a holding device, which can be pulled out of the printing or copying device, for the wearing parts, be it the squeegee or the sealing element, these wearing parts can easily be replaced in the event of service.
  • the exchange is simple and requires little time.
  • the holding device for the stripping element has a clamping device which makes it possible to attach the stripping element in a particularly simple, exchangeable manner.
  • the scraper element can have, in addition to an operating scraper edge resting on the intermediate carrier in the operating state of the cleaning device, further substitute edges. After wear of a scraper edge, the scraper element can be turned and fastened again in the clamping device. A new edge comes into contact with the intermediate beam.
  • the four corner edges of the stripping element can be used as operating edges. With a low amount of material, the operating time that can be achieved with a squeegee is considerably extended.
  • the sealing element which rests on the intermediate carrier and seals the cleaning device, is also advantageously designed as an exchangeable wear element.
  • a device which oscillates and moves the wipers parallel to the photoconductor drum. If printing is interrupted, the stripping element is pivoted away from the photoconductor drum together with the receptacle. This prevents damage to the photoconductor drum and the build-up of residual toner.
  • the entire cleaning device can be pulled out of the pressure device in ball guides for the exchange of consumables for cleaning the cleaning station itself and for repairs.
  • the toner outlet opening to the toner conveying device of the device is closed automatically. When it is pushed back in again, the toner outlet opening is automatically coupled to a toner hose assigned in the toner delivery system of the device.
  • the easy interchangeability of the entire cleaning device prevents long printing interruptions in the case of repair service.
  • FIG. 2 shows a schematic illustration of the cleaning device in longitudinal section along the section line I-I of FIG. 1,
  • FIG. 3 shows a schematic illustration of the cleaning device in longitudinal section along the section line II-II of FIG. 1
  • 4 shows a schematic cross-sectional illustration of the cleaning device along the section line IV-IV of FIG. 2
  • FIG. 5 shows a schematic cross-sectional view of the drive and suction device of the cleaning device
  • a printing device for single sheets working according to the principle of electrophotography which is only shown schematically here, contains a photoconductor drum 10 as an intermediate carrier.
  • the various for the photoconductor drum are necessary electrophotographic process aggregates such as exposure station, developer station, transfer printing station, cleaning station, etc., of which only the cleaning station is shown here.
  • the cleaning station is in principle divided into two parts, namely an actual cleaning unit 11 (FIG. 2) which can be pulled out of the housing of the printing device, with the cleaning and sealing elements contained therein, and a stationary drive and toner transport unit 12 (FIG. 5) with a drive motor and a coupling device for coupling the cleaning unit 11 to a toner transport device integrated in the device.
  • an actual cleaning unit 11 FIG. 2
  • a stationary drive and toner transport unit 12 FIG. 5
  • a drive motor and a coupling device for coupling the cleaning unit 11 to a toner transport device integrated in the device.
  • the cleaning unit 11 contains a stripping element 13 made of elastic material, for example rubber, which has a rectangular cross section and extends over the width of the recording medium or the photoconductor drum 10.
  • the stripping element 13 is glued on one side to two metal rails 14 and is inserted into a device holder 15 consisting of a plastic hollow profile.
  • the device holder 15 is designed and cooperates with the metal rails 14 of the stripping element 13 so that two opposite edges 16 of the stripping element to Rei can be used.
  • the stripping element 16 can be inserted into the device receptacle 15 by means of the metal rails 14.
  • the device holder 15 with the plastic profile is connected to a guide 17 and can be pivoted with this.
  • the device holder 15 also has plastic supports 18 at both ends.
  • a holding bar 19 is provided in the center of the device holder 15, which is connected on one side to a leg 20 of the device holder 15.
  • the device holder 15 is rotatably mounted on the guide rod 17 in a housing 21 of the cleaning unit.
  • a toner transport channel 22 which extends over the entire length of the stripping element 13 and in which a toner transport spring 23 is arranged as a transport element for the toner stripped from the stripping element 13.
  • the toner transport spring 23 is coupled to a claw clutch 24, which enables the toner transport spring 23 to be driven.
  • the toner transport spring 23 is coupled via a gear 25 (FIG 2) in the form of a worm gear with an extension 26 of the guide rod 17 of the stripping element 13.
  • the extension 26 is coupled via an eccentric to the gear 25 in such a way that when the toner transport spring 23 is driven via the claw coupling 24, the stripping element 13 is moved in an oscillating reciprocating motion with an amplitude of approximately 2.5 mm (Arrow).
  • This back and forth movement is intended to prevent toner from adhering to the stripping element 13, and the back and forth movement also supports the cleaning action of the stripping element 13 and thus enables the pressing force of the stripping element 13 onto the photoconductor drum 10 to be reduced.
  • a toner space 27 is formed below the stripping element 13 in the housing 21 of the cleaning unit 11.
  • This toner space or toner slot is closed to the rear and to the sides and can be swung out. It contains a rear cover element 28 with an elastic sealing piece 29 arranged thereon, which seals the cover element 23 with respect to the stripping element 13. Furthermore, a sealing tape 30 is arranged in the toner space 27, which extends over the width of the photoconductor drum and which seals the toner space 27 downward against the photoconductor drum 10 and which, like the stripping element 13, is designed as a wearing part.
  • the sealing tape 30 is glued to a sheet metal carrier 31 and can be snapped onto a carrier extruded profile 32 assigned to the housing 21 of the cleaning unit 11 and easily replaced by the operator without tools.
  • the guide rod 17 is connected to a lever in the form of a leaf spring 33 on the side of the cleaning unit 11 facing the drive and toner transport unit 12 according to FIG. 6.
  • An eccentric cam 34 of the drive and toner transport unit 12 acts on the leaf spring 33, which cam is coupled to a rotary magnet 35 and projects through an opening 36 in a holding device 37 of the printer housing that receives the cleaning unit 11.
  • the stripping element 13 is swiveled in and out via this eccentric cam 34.
  • the eccentric cam 34 is designed such that when swiveling shortly before the end position of the eccentric, the stripping element 13 comes into contact with the photoconductor drum 10. Now the leaf spring 33 is pretensioned by further rotation of the eccentric cam 34, so that a relatively large pressing force on the stripping element 13 is only generated after the stripping element 13 has been in contact with the photoconductor drum 10.
  • the cleaning unit 11 can be pulled out of the holding device 37 of the printing device on a ball guide 38 which connects the cleaning unit 11 with the holding device 37. In this case, an attachment acting on the holding device 37 is automatically used
  • the drive of the toner transport screw with the toner transport spring 23 in the toner transport channel 22 takes place via a device central drive (not shown here) with a toothed belt which engages on the mating coupling element 43 (gear wheel).
  • the cleaning device is controlled and monitored by a central device control arrangement, not shown here, which can be designed, for example, in accordance with US Pat. No. 4,593,407.
  • the scraper element 13 with the holding device 37 is first swiveled automatically during breaks in operation of the cleaning device, specifically by deactivating the rotary magnet 35, whereupon a bolt 47 supported on the guide rod 17 with the spring element 48 acting thereon the scraper element 13 and the holding device 37 pivots back.
  • Locking device which can consist, for example, of a mudguard attached to the front device, pull the cleaning unit 11 out of the device along the ball guide 38.
  • the drive coupling between the cleaning unit 11 and the drive and toner transport unit 12 is released.
  • the toner outlet opening 40 is closed via the slide 39.
  • Cleaning unit 11 pushed back and thus automatically coupled the toner outlet opening 40 with the toner hose 45 of the toner disposal system of the device.
  • the stripping element 13 When the printer operation is started, the stripping element 13 is pivoted again with the device holder 15 via the rotary magnet 36.
  • the stripping element 13 comes with its operating edge 16 into contact with the photoconductor drum, the operating edge 16 pressing radially (represented by the arrow in FIG. 1) against the surface of the photoconductor drum 10. This pressure direction has proven to be advantageous compared to leading and trailing edge cleaning systems.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Cleaning In Electrography (AREA)

Abstract

Un dispositif de nettoyage du cylindre photoconducteur (10) d'une imprimante électrophotographique comprend une racle (13) pivotant de façon à se rapprocher et à s'éloigner du cylindre photoconducteur (10). La racle (13) forme un élément d'usure échangeable. Afin de remplacer la racle (13) ou une bande d'étanchéité (30) dans la zone collectrice de toner du dispositif de nettoyage, on peut tirer le dispositif de nettoyage sur des guides (38) de façon à le sortir de l'imprimante; l'orifice de sortie du toner du dispositif de nettoyage se ferme alors automatiquement. Afin d'empêcher des particules de papier et de toner de coller au bord de la racle (13), un dispositif fait osciller la racle pendant son fonctionnement. La racle (13) s'éloigne du cylindre photoconducteur (10) par pivotement lorsque l'impression s'arrête.
PCT/EP1990/000271 1989-03-21 1990-02-19 Dispositif de nettoyage du support intermediaire d'une imprimante ou d'un copieur electrophotographiques Ceased WO1990011553A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE9090903019T DE59000554D1 (de) 1989-03-21 1990-02-19 Reinigungsvorrichtung fuer den zwischentraeger eines nach dem prinzip der elektrofotografie arbeitenden druck- oder kopiergeraetes.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP89105073 1989-03-21
EP89105073.4 1989-03-21

Publications (1)

Publication Number Publication Date
WO1990011553A1 true WO1990011553A1 (fr) 1990-10-04

Family

ID=8201122

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1990/000271 Ceased WO1990011553A1 (fr) 1989-03-21 1990-02-19 Dispositif de nettoyage du support intermediaire d'une imprimante ou d'un copieur electrophotographiques

Country Status (2)

Country Link
EP (1) EP0464032B1 (fr)
WO (1) WO1990011553A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5451862A (en) * 1992-09-09 1995-09-19 Henkels & Mccoy, Inc. System and method of use for conducting a neutral corrosion survey

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5832355A (en) * 1995-05-03 1998-11-03 Siemens Nixdorf Informationssysteme Aktiengesellschaft Cleaning mechanism for the photoconductive drum of a printer or copier device
DE19542028C2 (de) * 1995-11-10 1997-09-04 Oce Printing Systems Gmbh Fördereinrichtung für Alttoner in einer Reinigungsvorrichtung eines elektrografischen Druck- oder Kopiergeräts

Non-Patent Citations (7)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 10, Nr. 327 (P-513) (2383), 7. November 1986; & JP-A-61132981 (Canon Inc.) 20. Juni 1986 *
PATENT ABSTRACTS OF JAPAN, Band 10, Nr. 53 (P-433) (2110), 4. Marz 1986; & JP-A-60198575 (Konishiroku Shashin Kogyo K.K.) 8. Oktober 1985 *
PATENT ABSTRACTS OF JAPAN, Band 10, Nr. 89 (P-444) (2146), 8. April 1986; & JP-A-60225186 (Konishiroku Shashin Kogyo K.K.) 9. November 1985 *
PATENT ABSTRACTS OF JAPAN, Band 6, Nr. 8 (P-98) (886), 19. Januar 1982; & JP, A, 56133778 (Ricoh K.K.) 20. Oktober 1981 *
PATENT ABSTRACTS OF JAPAN, Band 7, Nr. 260 (P-237) (1405), 18. November 1983; & JP-A-58142377 (Canon K.K.) 24. August 1983 *
PATENT ABSTRACTS OF JAPAN, Band 8, Nr. 27 (P-252) (1464), 4. Februar 1984; & JP-A-58182680 (Ricoh K.K.) 25. Oktober 1983 *
PATENT ABSTRACTS OF JAPAN, Band 8, Nr. 45 (P-257) (1482), 28. Februar 1984; & JP-A-58196570 (Ricoh K.K.) 16. November 1983 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5451862A (en) * 1992-09-09 1995-09-19 Henkels & Mccoy, Inc. System and method of use for conducting a neutral corrosion survey

Also Published As

Publication number Publication date
EP0464032A1 (fr) 1992-01-08
EP0464032B1 (fr) 1992-12-02

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