EP0459607B1 - Recording apparatus - Google Patents

Recording apparatus Download PDF

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Publication number
EP0459607B1
EP0459607B1 EP91300504A EP91300504A EP0459607B1 EP 0459607 B1 EP0459607 B1 EP 0459607B1 EP 91300504 A EP91300504 A EP 91300504A EP 91300504 A EP91300504 A EP 91300504A EP 0459607 B1 EP0459607 B1 EP 0459607B1
Authority
EP
European Patent Office
Prior art keywords
conductive
latent image
electrostatic latent
recording apparatus
toner particles
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.)
Expired - Lifetime
Application number
EP91300504A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0459607A3 (en
EP0459607A2 (en
Inventor
Masahiro C/O Intellectual Property Div. Hosoya
Shuitsu C/O Intellectual Property Div. Sato
Mitsunaga C/O Intellectual Property Div. Saito
Yoshimitsu C/O Patent Division Ohtaka
Mitsuharu C/O Patent Division Endo
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.)
Toshiba Corp
Toshiba TEC Corp
Original Assignee
TEC KK
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Tokyo Electric Co Ltd
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
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Application filed by TEC KK, Toshiba Corp, Tokyo Shibaura Electric Co Ltd, Tokyo Electric Co Ltd filed Critical TEC KK
Publication of EP0459607A2 publication Critical patent/EP0459607A2/en
Publication of EP0459607A3 publication Critical patent/EP0459607A3/en
Application granted granted Critical
Publication of EP0459607B1 publication Critical patent/EP0459607B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • G03G21/0064—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 the developing unit, e.g. cleanerless or multi-cycle apparatus
    • 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
    • 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
    • G03G15/02—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
    • G03G15/0208—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices by contact, friction or induction, e.g. liquid charging apparatus
    • G03G15/0216—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices by contact, friction or induction, e.g. liquid charging apparatus by bringing a charging member into contact with the member to be charged, e.g. roller, brush chargers
    • 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
    • G03G15/02—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
    • G03G15/0291—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices corona discharge devices, e.g. wires, pointed electrodes, means for cleaning the corona discharge device
    • 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
    • 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
    • G03G2215/02—Arrangements for laying down a uniform charge
    • G03G2215/021—Arrangements for laying down a uniform charge by contact, friction or induction
    • G03G2215/022—Arrangements for laying down a uniform charge by contact, friction or induction using a magnetic brush
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2221/00—Processes not provided for by group G03G2215/00, e.g. cleaning or residual charge elimination
    • G03G2221/0005—Cleaning of residual toner

Definitions

  • the present invention relates to a recording apparatus according to the electrophotographic process, in particular, relates to a cleanerless recording apparatus for recording an image without providing a cleaning device for cleaning toner particles which are left after the image is transferred.
  • a recording apparatus for developing an image and collecting toner particles which are left after the image is transferred by means of a developing device, hereinafter named cleanerless recording apparatus, has been disclosed in the publications of Japanese Patent Laid Open No. SHO 59-133573, SHO 59-157661, and so forth.
  • cleanerless recording apparatus a basic engineering concept for the cleanerless recording apparatus has been disclosed. The concept can be summarized as follows. As shown by a sectional view of principal structure of FIG. 1, in an electrophotographic printer such as a laser printer, the reverse development process is widely used. In this reverse development process, toner particles 2 with the same polarity as an electrostatic latent image base (photosensitive substance) are used.
  • the toner particles 2 are adhered to the portion where electric charges are absent (or the amount of electric charges is small) on the surface of the electrostatic latent image base 1.
  • the toner particles 2 are not adhered to the portion where electric charges are present.
  • ) so as to prevent the toner particles from being adhered to the electrostatic latent image base 1 by means of the electric field against the charged portion on the surface of the electrostatic latent image base 1.
  • the toner particles 2 are adhered to the electrostatic latent image base 1 with the electric field against the non-charged portion on the surface of the electrostatic latent image base 1.
  • the toner particles 2 adhered on the electrostatic latent image base 1 are transferred to an image base 6 by a transferring device 5. In this transfer process, all the toner particles are not transferred.
  • residual transfer particles 2′ are distributed in an image shape.
  • the remaining toner particles 2′ are collected. Thereafter, by an discharging lamp 8, the electric charges on the electrostatic latent image base 1 are cleared. Thereafter, an electrostatic latent image forming process consisting of an equalizing and charging process by the charger 9 and an exposing process by light beam 10 takes place.
  • the cleanerless recording apparatus since it is not provided with the cleaner 7, the residual toner particles 2′ are developed. The electrostatic latent image is developed and the residual toner particles 2′ are collected into the developing device 3 at the same time.
  • the residual toner particles 2′ which exist at the charged portion of the latent image formed by the exposure of the light beam 10 are securely charged to the same polarity as that of the latent image by the charger 9.
  • the electric field which disturbs the toner particles 2 from being moved from the toner carrier 4 to the electrostatic latent image base 1 namely, the electric field by the potential between V0 and V b
  • the residual toner particles 2′ are moved to the toner carrier 4.
  • the residual toner particles 2′ which are present at the non-charged portion (namely, the exposed portion or image portion) is affected by a force which acts from the toner carrier 4 to the electrostatic latent image base 1 and thereby the residual toner particles 2′ stay on the electrostatic latent image base 1.
  • a force which acts from the toner carrier 4 to the electrostatic latent image base 1 and thereby the residual toner particles 2′ stay on the electrostatic latent image base 1.
  • new toner particles 2 are moved from the toner carrier 4.
  • the latent image is developed and the toner particles 2 are cleaned at the same time.
  • the cleanerless recording apparatus since the cleaner 7 and a toner disposal box for collecting cleaned toner particles (namely, used toner particles) are not necessary. Thus, the apparatus becomes small in size and simple in structure. In addition, since the residual toner particles 2′ are collected into the developing device 3 and reused, the disposal toner particles are not present. Thus, the apparatus can be economically operated. In addition, since the electro-static latent image base 1 is not abraded by the cleaning blade, the life of the electrostatic latent image base 1 can be prolonged.
  • Japanese Patent Laid-Open No. SHO 62-203183 discloses that by applying a voltage to a conductive brush 11 in the shape shown in FIG. 2 and lightly contacting it with the surface of the electrostatic latent image base 1, the ghost can be cleared.
  • the residual toner particles 2′ are temporarily attracted to the conductive brush 11 by the Coulomb's force.
  • the amount of the residual toner particles 2′ on the surface of the electrostatic latent image base 1 can be remarkably reduced, thereby preventing such ghosts from taking place.
  • EP-A-0400563 a state of the art according to Article 54(3) EPC, discloses a recording apparatus comprising an image carrying body, an exposing device for exposing the image carrying body, to form an electrostatic latent image thereon, a developing and cleaning device for supplying a developing agent to the electrostatic latent image to develop the latent image and for removing the developing agent remaining on the image carrying body, a transfer device for transferring the developed image to a sheet like material and a disordering and charge device for disordering the developing agent remaining on the image carrying body after transfer of the developed image, and for charging the image carrying body.
  • GB-A-2129372 discloses an electrically conductive brush is used for redistributing the residual toner images over imaging surface so that the toner can be more effectively removed from the surface by the developer system.
  • the brush is moved in a direction perpendicular to the direction of movement of the photoconductive surface and is electrically biased by means of an A.C. voltage and a DC voltage such that not only is the toner dislodged it is also picked up by the brush from one area of the photoconductive surface and dropped it on another area.
  • an object of the present invention is to provide a recording apparatus which is small in size and low in price.
  • Another object of the present invention is to provide a safe recording apparatus which does not generate a harmful gas as the by-product during the operation.
  • Another object of the present invention is to provide a recording apparatus which is free from deterioration of parts such as the electrostatic latent image base and which has a high durability.
  • a recording apparatus comprising: an electrostatic latent image base; charging means for equally charging the surface of said electrostatic latent image base, said charging means being composed of a conductive contactor; exposing means for exposing said electrostatic latent image base to form an electrostatic latent image thereon, said exposing means being disposed-outside of said electrostatic latent image base; reverse developing means for adhering toner particles on said electrostatic latent image so as to form a toner image; and transferring means for transferring said toner image onto a recording paper; wherein said reverse developing means attracts and collects residual toner particles into said developing means and develops said electrostatic latent image at the same time; wherein said conductive contactor comprises a conductive roller having a smooth surface and disposed in contact with said electrostatic latent image base; and wherein a direct current voltage having the same polarity as the toner particles which contribute to developing is applied to said conductive contactor, said direct current voltage charges said surface of said electrostatic latent image
  • a recording apparatus comprising: an electrostatic latent image base; charging means for equally charging the surface of said electrostatic latent image base, said charging means being composed of a conductive contactor; exposing means for exposing said electrostatic latent image base to form an electrostatic latent image thereon, said exposing means being disposed outside of said electrostatic latent image base; reverse developing means for adhering toner particles on said electrostatic latent image so as to form a toner image; and transferring means for transferring said toner image onto a recording paper; wherein said reverse developing means, attracts and collects residual toner particles into said developing means and develops said electrostatic latent image at the same time; and wherein a direct current voltage having the same polarity as the toner particles which contribute to developing and an alternating current voltage superimposed on said direct current voltage is applied to said conductive contactor, said direct current voltage and said alternating current voltage charging said surface of said electrostatic latent image base and said residual toner particles and equalizing the distribution of the
  • a real cleanerless recording apparatus can be provided.
  • the charging means by structuring the charging means with a contacter where a voltage is applied, when the electrostatic latent image base is equally charged by the charging means, the residual toner particles left on the electrostatic latent image base are slid, a particular voltage being applied.
  • the applied voltage disturbs the distribution of the toner particles.
  • the distribution of the toner particles is totally equalized. Consequently, the residual toner particles do not cause ghosts to appear on the subsequent image.
  • the electrostatic latent image base is not charged by so-called corona discharging process, but known field emission process or ion conduction process.
  • the apparatus scarcely generates a by-product in the operation thereby it does not disadvtangeously affect the human bodies and the electrostatic latent image base.
  • FIG. 3 is a sectional view of the principal portions of a recording apparatus according to the present invention.
  • a developing device 3 is provided for developing a latent image of an electrostatic latent image base (photosensitive substance) 1.
  • the developing device 3 is provided with a toner carrier 4.
  • the toner carrier 4 supplies toner particles 2 charged with the same polarity as the electrostatic latent image base 1 to the surface of the electrostatic latent image base 1. At the portion on the surface of the electrostatic latent image base 1 where the electric charges are absent (or where the amount of electric charges is small), the toner particles 2 are adhered. At the portion where the electric charges are present, the toner particles 2 are not adhered.
  • Such selective toner particle adhesion is accomplished in the structure where an intermediate voltage between the potential V0 at the charged portion on the surface of the electrostatic latent image base 1 and the potential V1 at the non-charged portion, namely V b (
  • the apparatus is also provided with a transferring device 5, a discharging lamp 8, a conductive brush roller 13, and light beam 10 for transferring the toner particles 2 adhered on the electrostatic latent image base 1 to the image base 6.
  • a transferring device 5 a discharging lamp 8 a conductive brush roller 13, and light beam 10 for transferring the toner particles 2 adhered on the electrostatic latent image base 1 to the image base 6.
  • the transfer operation generally, all the toner particles are not transferred.
  • residual toner particles 2′ are left in an image shape.
  • the electric charges on the electrostatic latent image base 1 are cleared by the discharging lamp 8. Thereafter, the electrostatic latent image base 1 is equally charged by the conductive brush roller 13 and then an electrostatic latent image is formed by the exposure with the exposing means 10.
  • the residual toner particles 2′ are developed.
  • the electrostatic latent image is developed and the residual toner particles 2′ are collected into the developing device 3 at the same time.
  • the residual toner particles 2′ which stay at the charged portion (namely, non-exposed portion or non-image portion) of the latent image formed by the exposure with the exposing means 10 are securely charged with the same polarity as that of the latent image by the conductive brush roller 13.
  • the residual toner particles 2′ stay at the non-charged portion (namely at the exposed portion or image portion) are affected by a force which acts from the toner carrier 4 to the electrostatic latent image base 1 is left on the surface of the electrostatic latent image base 1.
  • new toner particles 2 are moved from the toner carrier 4.
  • the latent image is developed and the residual toner particles 2′ are cleaned at the same time.
  • the recording apparatus according to the present invention is basically in the same structure as that shown in FIG. 2 except that the former is not provided with the conductive brush 11 and is provided with the conductive brush roller 13 instead of the charger 9, a voltage being applied to the conductive brush roller 13.
  • the conductive brush roller 13 is provided with conductive fibers (brush) 14 whose volume specific resistance is in the range from 102 to 1010 ohms cm, preferably in the range from 103 to 108 ohms cm disposed on the outer periphery thereof.
  • a roller substrate 15 on which the brush 14 is disposed is a rigid conductive substance such as a metal or a resilient conductive substance such as a conductive rubber or conductive foam.
  • the thickness of fibers structuring the brush 14 is preferably in the range 0.5 to 10 gms of 9000 metres of fibre (0.5 to 10 deniers).
  • the fiber density is preferably in the range from 5000 pieces/cm2 to 100,000 pieces/cm2.
  • the length of the fibers is preferably in the range from 0.5 mm to 5.0 mm. These values are chiefly based on the requirements of the charging function which will be described later.
  • An AC power supply, a DC power supply, or a power supply 17 connected to one of them is connected to the conductive substrate 15 of the conductive brush roller 13 through an ammeter 16 so that an AC voltage or a DC voltage is applied to the conductive substrate 15.
  • the direction of the rotation of the conductive brush roller 13 may be the same or reverse rotating direction of the electrostatic latent image base 1.
  • the peripheral speed preferably differs from the surface speed of the electrostatic latent image base 1.
  • the peripheral speed of the conductive brush roller 13 is preferably faster than or slightly slower than that of the electrostatic latent image base 1.
  • the peripheral speed of the conductive brush roller 13 is preferably in the range from 1.2 to 5.0.
  • the contacting width of the conductive brush roller 13 and the electrostatic latent image base 1 is preferably 0.5 mm or more.
  • the peripheral speed of the electrostatic latent image base 1 is 40 mm/sec; the outer diameter of the conductive brush roller 13 is 25 mm; the resistance of the fibers structuring the conductive brush roller 13 is 105 ohms cm; the length of the fibers is 2.5 mm; the thickness of the fibers is 3 deniers; the fiber density is 40,000 pieces/cm2; the peripheral speed of the conductive brush roller 13 is 60 mm/sec; a DC voltage of -500 V is superimposed to an AC voltage of 800 V p-p as a voltage to be applied; and the contacting width of the conductive brush roller 13 and the electrostatic latent image base 1 is 3 mm.
  • the surface of the organic photosensitive substance (electrostatic latent image base) 1 was equally charged with a voltage in the range from -450 V to -500 V. The charged surface was exposed with a laser beam. Thereafter, the organic photosensitive substance was developed by the two component development method or the one component development method. Thereafter, the toner image was transferred to transfer paper 6 with a known transferring charger 5. After the toner image had been transferred, residual toner particles 2′ stayed on the organic photosensitive substance (electrostatic latent image base) 1 in an image shape. The surface of the organic photosensitive substance on which the residual toner particles 2′ had been adhered was discharged by the discharging lamp 8. Thereafter, the organic photosensitive substance 1 arrived at the position of the conductive brush roller 13.
  • the residual toner particles 2′ are equalized by the sliding force of the conductive brush roller 13 and vibrated by the AC electric field, they are much equalized.
  • the conductive fibers 14 of the conductive brush roller 13 contacted with the surface of the organic phtosensitive substance 1 cause the surface of the organic photosensitive substance 1 to be negatively charged.
  • the organic photosensitive substance 1 is equally charged.
  • the similar equalizing effect and charging effect can be obtained.
  • the AC voltage and the frequency are preferably in the range from 300 V p-p to 2000 V p-p and in the range from 200 Hz to 5 kHz, respectively.
  • the absolute value of the DC voltage to be superimposed is preferably the potential of the electrostatic latent image base 1 or a larger value than that (particularly, a large value in the range from 200 to 500 V).
  • the material of the fibers 14 of the conductive brush roller 13 include rayon, polyamide, acrylic resin, tetraphloro polyethylene, and so forth where conductive treatment has been applied.
  • a fixed type conductive brush 13a shown in FIG. 4 may be used instead of the conductive brush roller 13 in the embodiment 1.
  • the fixed type conductive brush 13a is provided with a conductive fibers 14 disposed on a concave surface of a fixed substrate piece 15a.
  • the contacting width of the conductive brush 13a namely a means for accomplishing both the charging function and equalizing function of the residual toner image
  • the electrostatic latent image base 1 is preferably 3 mm or more.
  • a conductive roller 13b shown in FIG. 5 may be used.
  • the conductive roller 13b when the electrostatic latent image base 1 is composed of a rigid substance, the conductive roller 13b is preferably a resilient substance.
  • FIG. 5 exemplifies the conductive roller 13b comprising a metal shaft 15, a conductive rubber layer 18 disposed at the outer periphery thereof, and a surface layer 18a made of a conductive resin or elastomer disposed on the surface thereof.
  • the conductive roller 13b may be of a single layer type without the surface layer 18a.
  • the material of the conductive roller 13b is preferably a conductive rubber layer 18 and a surface layer 18a whose specific resistance is in the range from 103 to 1010 ohms cm.
  • the electric and mechanic conditions of the present embodiment may be nearly same as those of the embodiment 1.
  • the magnetic brush 19 comprises a fixed type or rotating type magnet roller 20, a fixed type or rotating type sleeve 21 disposed at the periphery thereof, and a magnetic particle layer 22 adhered at the periphery thereof.
  • the magnetic particles may be iron powder, ferrite, or the like whose volume specific resistance is in the range from 102 to 1010 ohms cm and whose average particle diameter is in the range from 10 »m to 200 »m.
  • Other electric and mechanical conditions may be the same as those of the embodiment 1.
  • the charging and residual toner image equalizing means securely charges the electrostatic latent image base and equalizes the residual toner particles at the same time.
  • the recording apparatus can be readily structured in small size and at low cost.
  • the recording apparatus is free from contamination due to by-product in the discharging operation.
  • the recording apparatus can usually output ghost-free high quality images.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Cleaning In Electrography (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)
  • Dry Development In Electrophotography (AREA)
  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)
  • Combination Of More Than One Step In Electrophotography (AREA)
  • Brushes (AREA)
EP91300504A 1990-05-31 1991-01-23 Recording apparatus Expired - Lifetime EP0459607B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2142970A JP2856506B2 (ja) 1990-05-31 1990-05-31 記録装置
JP142970/90 1990-05-31

Publications (3)

Publication Number Publication Date
EP0459607A2 EP0459607A2 (en) 1991-12-04
EP0459607A3 EP0459607A3 (en) 1992-09-02
EP0459607B1 true EP0459607B1 (en) 1995-08-23

Family

ID=15327898

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91300504A Expired - Lifetime EP0459607B1 (en) 1990-05-31 1991-01-23 Recording apparatus

Country Status (4)

Country Link
EP (1) EP0459607B1 (ja)
JP (1) JP2856506B2 (ja)
KR (1) KR950013418B1 (ja)
DE (1) DE69112281T2 (ja)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0474220B1 (en) * 1990-09-07 1998-11-25 Konica Corporation Charging device
JPH05346751A (ja) 1992-06-16 1993-12-27 Fujitsu Ltd 画像形成装置
JPH0651612A (ja) * 1992-07-30 1994-02-25 Oki Electric Ind Co Ltd 画像形成装置
US5426488A (en) * 1992-10-19 1995-06-20 Sharp Kabushiki Kaisha Method of charging a built-in electrophotographic charge member
JPH07114311A (ja) * 1993-10-15 1995-05-02 Fujitsu Ltd 画像形成装置
JPH0822232A (ja) * 1994-07-06 1996-01-23 Sharp Corp 画像形成装置
JP3100838B2 (ja) * 1994-07-20 2000-10-23 シャープ株式会社 画像形成装置
JPH0854771A (ja) * 1994-08-11 1996-02-27 Fujitsu Ltd 画像形成装置
CN1072814C (zh) 1994-10-31 2001-10-10 佳能株式会社 成象方法,成象设备和处理卡盒
US5659852A (en) * 1994-10-31 1997-08-19 Canon Kabushiki Kaisha Image forming method, image forming apparatus and process cartridge
JP3113803B2 (ja) * 1994-11-08 2000-12-04 東芝テック株式会社 画像形成装置
JP3155915B2 (ja) * 1994-11-18 2001-04-16 キヤノン株式会社 画像形成装置
US6256462B1 (en) * 1998-10-09 2001-07-03 Canon Kabushiki Kaisha Image formation apparatus and control method thereof
US6567625B1 (en) * 1999-05-27 2003-05-20 Matsushita Electric Industrial Co., Ltd. Image forming apparatus and process cartridge with delayed rotation of photosensitive member
JP2001100592A (ja) * 1999-09-30 2001-04-13 Minolta Co Ltd 画像形成装置
JP5835986B2 (ja) 2011-07-27 2015-12-24 日立オートモティブシステムズ株式会社 シリンダ装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2129372A (en) * 1982-11-01 1984-05-16 Xerox Corp Cleaning photoconductors

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4470693A (en) * 1982-01-11 1984-09-11 Pitney Bowes Inc. Self-cleaning xerographic apparatus
JPS6142669A (ja) * 1984-08-06 1986-03-01 Oki Electric Ind Co Ltd 電子写真帯電装置
JPS61107357A (ja) * 1984-10-31 1986-05-26 Fuji Xerox Co Ltd ブラシ帯電装置
JPS62175780A (ja) * 1986-01-30 1987-08-01 Mita Ind Co Ltd 非晶質シリコン感光体を用いた電子写真装置
US4769676A (en) * 1986-03-04 1988-09-06 Kabushiki Kaisha Toshiba Image forming apparatus including means for removing residual toner
JPS63187267A (ja) * 1987-01-30 1988-08-02 Nippon Telegr & Teleph Corp <Ntt> 帯電装置
JPS63221366A (ja) * 1987-03-11 1988-09-14 Fujitsu Ltd 導電ブラシ帯電装置
JP2633686B2 (ja) * 1989-05-31 1997-07-23 株式会社東芝 画像形成装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2129372A (en) * 1982-11-01 1984-05-16 Xerox Corp Cleaning photoconductors

Also Published As

Publication number Publication date
KR910020509A (ko) 1991-12-20
JPH0434566A (ja) 1992-02-05
EP0459607A3 (en) 1992-09-02
EP0459607A2 (en) 1991-12-04
DE69112281T2 (de) 1996-02-15
DE69112281D1 (de) 1995-09-28
JP2856506B2 (ja) 1999-02-10
KR950013418B1 (ko) 1995-11-08

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