EP1288738B1 - Image forming apparatus and cleaning device therefor - Google Patents

Image forming apparatus and cleaning device therefor Download PDF

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Publication number
EP1288738B1
EP1288738B1 EP02019723A EP02019723A EP1288738B1 EP 1288738 B1 EP1288738 B1 EP 1288738B1 EP 02019723 A EP02019723 A EP 02019723A EP 02019723 A EP02019723 A EP 02019723A EP 1288738 B1 EP1288738 B1 EP 1288738B1
Authority
EP
European Patent Office
Prior art keywords
brush
flicker
roller
casing
brush roller
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
EP02019723A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1288738A2 (en
EP1288738A3 (en
Inventor
Ken Amemiya
Yukiko Iwasaki
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Publication of EP1288738A2 publication Critical patent/EP1288738A2/en
Publication of EP1288738A3 publication Critical patent/EP1288738A3/en
Application granted granted Critical
Publication of EP1288738B1 publication Critical patent/EP1288738B1/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
    • 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
    • G03G15/0225—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 provided with means for cleaning the charging member
    • 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
    • G03G21/0035—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 brush; Details of cleaning brushes, e.g. fibre density
    • 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
    • G03G2215/1647—Cleaning of transfer member
    • G03G2215/1661—Cleaning of transfer member of transfer belt
    • 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
    • G03G2221/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts
    • G03G2221/1693—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts for charging
    • 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
    • G03G2221/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts
    • G03G2221/18—Cartridge systems
    • 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
    • G03G2221/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts
    • G03G2221/18—Cartridge systems
    • G03G2221/183—Process cartridge

Definitions

  • the present invention relates to a copier, printer, facsimile apparatus or similar image forming apparatus and more particularly to a cleaning device for an image forming apparatus.
  • An image forming apparatus includes a cleaning device for cleaning the surface of an image carrier, a cleaning device for cleaning the surface of a charge roller that charges the image carrier, and a cleaning device for cleaning the surface of an image transfer belt.
  • Japanese Patent Laid-Open Publication No. 7-140763 discloses a cleaning device using a brush roller that contacts the surface of a member to be cleaned.
  • the brush roller is rotated by a drive source.
  • a brush on the brush roller and the surface of the member to be cleaned each are moved at a particular linear velocity, so that the brush scrapes off impurities deposited on the member.
  • the conventional brush roller type of cleaning device needs the drive source for driving the brush roller.
  • this type of cleaning device needs means for limiting the amount of bite of the brush into the desired member in order to control the permanent deformation of the brush. This increases the cost of the cleaning device and makes the cleaning device sophisticated.
  • the amount of bite of the brush refers to the maximum amount of deformation of the brush roller to occur in the radiation direction when the brush is pressed against the surface of the desired member. It has been customary to control the yield of the brush by confining the amount of bite in an adequate range.
  • US 5,842,081 A relates to a method and apparatus for charging an electrographic photoreceptor.
  • JP 59-218479 A relates to a cleaning device of image forming face.
  • the rotary brush is held by the turning arm and is supported freely turnably with respect to a supporting shaft. Consequently, even if the outside diameter of the rotary brush is changed by wear, deformation, or the like, the rotary brush is always brought into contact with a cylindrical surface of a rotary drum with an approximately constant contacting pressure which is determined by the weight of the rotary brush, the weight of a counter weight, and distances from the supporting shaft to individual gravity action lines, unless the turning arm strikes a stopper, and thus, a stable cleaning effect is always attained.
  • the outside diameter of the rotary brush is detected by a photosensor to detect automatically the quantity of wear of the rotary brush.
  • a cleaning device includes a brush roller having a brush held in contact with the surface of a body to be cleaned.
  • the brush contacts the surface of the body to be cleaned due to the weight of the brush roller and rotates by following the movement of the above surface.
  • a flicker is held in contact with the brush in order to remove toner deposited on the brush.
  • a casing forms a chamber therein for storing the toner removed by the flicker.
  • an image forming apparatus embodying the present invention includes a charge roller 2 to be cleaned.
  • the image forming apparatus has one or more of an electronic copier function, a printer function, and a facsimile apparatus function.
  • the image forming apparatus includes an image carrier implemented as a photocoductive drum 1.
  • the drum 1 On the start of an image forming cycle, the drum 1 is caused to rotate in a direction indicated by an arrow A in FIG. 1 .
  • the charge roller 2 is located to face the surface of the drum 1.
  • a drive source, not shown, or the drum 1 in rotation causes the charge roller 2 to rotate in a direction indicated by an arrow B.
  • the charge roller 2 is made up of a metallic core 3 and an elastic body 4 affixed to the core 3 . While the charge roller 2 is in rotation, a voltage of preselected polarity is applied to the charge roller 2 to thereby charge the surface of the drum 1 to the preselected polarity.
  • a laser writing unit scans the charged surface of the drum 1 with a laser beam LB in accordance with image data, thereby forming a latent image on the drum 1.
  • a developing device 5 develops the latent image with toner to thereby produce a corresponding toner image. More specifically, in the illustrative embodiment, the developing device 5 includes a casing 6 storing a powdery developer D and a sleeve 7 for conveying the developer D deposited thereon. While the sleeve 7 is rotated in a direction indicated by an arrow C in FIG. 1 , toner contained in the developer is electrostatically transferred from the sleeve 7 to the latent image, developing the latent image.
  • An image transfer belt (simply belt hereinafter) 8 faces the drum 1 and moves in a direction indicated by an arrow E in FIG. 1 .
  • the belt 8 conveys a sheet or recording medium P fed from a sheet feed section not shown.
  • a voltage for image transfer is applied to an image transferring device 9, which faces the drum 1 with the intermediary of the belt 8.
  • the image transferring device 9 electrostatically transfers the toner image from the drum 1 to the sheet P. If desired, the toner image may be transferred from the drum 1 to the sheet P by way of an intermediate image transfer body.
  • a cleaning brush 10 and a cleaning blade 11 remove the toner left on the drum 1 after the image transfer.
  • a fixing device not shown, fixes the toner image with heat and pressure.
  • the image carrier, charge roller 2, cleaning brush 10 and a brush roller 12, which will be described later, are rotatably mounted on a unit case 13. Further, the base end of the cleaning blade 11 is affixed to the unit case 13, completing a single unit 14. The unit 14 is movable into and out of the apparatus body along guide rails 15, as needed.
  • the cleaning brush 10, cleaning blade 11 and a cleaning case 16, which is part of the unit case 13, constitute a cleaning device 17 for cleaning the surface of the drum 1.
  • the charge roller 2 for charging the drum 1 is held in contact with the surface of the drum 1.
  • the charge roller 2 may be slightly spaced from the surface of the drum 1, if desired.
  • toner undesirably passed the cleaning blade 11 and impurities flying about inside the apparatus body and including toner deposit on the surface of the charge roller 2.
  • Such toner and impurities would make the charging of the drum 1 irregular or defective and would thereby lower the image quality of the resulting toner image.
  • the illustrative embodiment solves the above problem with a cleaning device 18 assigned to the charge roller 2 and including the brush roller 12.
  • the brush roller 12 extends in parallel to the charge roller 2.
  • the brush roller 12 is made up of a rigid core 19 formed of metal or resin and a brush 20 having a number of filaments, which are affixed to the core 19 at base portions thereof.
  • the brush 20 extends over the entire circumference of the core 19 over an axial range W shown in FIG. 3 .
  • the brush 20 is held in contact with the charge roller 2, which is a member to be cleaned.
  • the brush roller 12 is configured such that the brush 20 contacts the surface of the charge roller 2 due to the weight of the brush roller 12.
  • the charge roller 2 in rotation causes the brush roller 12 to rotate in a direction indicated by an arrow G in FIGS. 1 and 2 .
  • the unit case includes a rear side wall 13A and a front side wall, not shown, to each of which a bearing member 21 is affixed.
  • a guide slot 22 is formed in each bearing member 21.
  • Axially opposite ends of the core 19 of the brush roller 12 are respectively rotatably received in the guide slots 22 of the two bearing members 21.
  • the core 19 is slidable along the guide slots 22 in a direction indicated by an arrow F in FIG. 2 , i.e., toward and away from the charge roller 2.
  • the guide slots 22 each have a width slightly greater than the diameter of the core 19, so that the opposite ends of the core 19 are stably received in the guide slots 22 without shaking.
  • the brush roller 12 is positioned above the charge roller 2. This, coupled with the fact that the core 19 is slidably received in the guide slots 22, allows the brush roller 12 to rest on the surface of the charge roller 2 due to the weight of the brush roller 12. Further, because the core 19 is rotatably received in the guide slots 22, the charge roller 2 rotating in the direction B causes the brush roller 12 to rotate in the direction G. That is, the brush roller 12 follows the rotation of the charge roller 2. In this condition, the brush 20 contacting the surface of the charge roller 2 removes the toner from the above surface.
  • the brush roller 12 is not driven by a drive source, but is driven by the charge roller 2. This obviates the need for an exclusive drive source and thereby simplifies the configuration of the cleaning device 18 while reducing the cost.
  • the brush 20 does not contact the surface of the charge roller 2 with an excessive force, protecting the surface from wear.
  • the amount of bite of the brush 20 is produced by subtracting the above distance from the above sum. If the amount of bite is excessively great, then the filaments of the brush 20 deteriorate soon and permanently deform, i.e., yield. If the amount of bite is excessively small, then the brush 20 fails to efficiently clean the surface of the charge roller 20.
  • the brush roller 12 contacts the surface of the charge roller 2 due to its own weight. It follows that a desired amount of bite of the brush 20 is achievable only if the weight of the brush roller 12 is adjusted, obviating the need for the conventional limiting means.
  • the cleaning device 18 is therefore simple in configuration and low cost.
  • the length of the filaments constituting the brush 20 is open to choice, it should preferably be 2 mm or less, more preferably 0.4 mm to 0.6 mm. It should be noted that the length of the filaments excludes the portions affixed to the core 19. The filaments with such a small length successfully reduce a bending moment to act on the base portions of the filaments although the filaments elastically bend in contact with the charge roller 2. The brush 20 is therefore free from yield or permanent deformation over a long period of time and achieves a long life. If the length of the filaments is greater than 2 mm, then the distance between nearby filaments at the tip increases with the result that the load to act on the individual filament contacting the charge roller 2 increases, aggravating the yield of the brush 20.
  • the linear mass density should preferably be 2 denier or below while the density should preferably be 20,000 filaments/cm 2 or above, more preferably 30,000 filaments/cm 2 .
  • the weight of the brush 12 which is also open to choice, should preferably be 50 g or above, but 200 g or below, in order to guarantee the adequate bite of the brush 20 and smooth rotation of the brush roller 12.
  • a weight below than 50 g makes the amount of bite of the brush 20 short and thereby lowers the cleaning efficiency.
  • a weight above 200 g makes the amount of byte excessive and thereby accelerates the yield of the brush.
  • the brush 20 may be affixed to the core 19 by any suitable method.
  • the base end of the brush 20 is affixed to the core 19 by electrostatic implantation, short filaments can be densely implanted in the core 19 and are free from yield over a long period of time.
  • adhesive may be coated on the core 19 over the axial range W, in which case a number of filaments will be electrostatically adhered to the adhesive to be affixed to the core 19 via the adhesive.
  • the filaments of the brush 20 may be formed of any suitable material. Experiments showed that nylon 66, PET (polyethylene terephthalate) or similar resin effectively reduced the yield of the brush 20 and insured the adequate amount of bite. If desired, the filaments may be formed of a material capable of electrostatically collecting toner from the charge roller 2 so as to further promote efficient cleaning.
  • the member to be cleaned is a cylindrical rotary body like the charge roller 2, FIG. 1 .
  • the brush roller 12 contacts a cylindrical body 2A anywhere in a range S above a horizontal plane H containing the axis O of the body 2A, the brush 20 can desirably contact the body 2A due to its own weight.
  • the cleaning device shown and described is similarly applicable to any one of the other members including the image carrier 1, belt 8, and intermediate image transfer body.
  • At least the cleaning device 18 and charge roller 2 or similar member to be cleaned may be constructed into the unit 14, as shown in FIG. 1 .
  • the brush 12 with filaments as short as 2 mm or less can be reduced in diameter and can therefore reduce the size of the unit 14. This is also true with an image forming apparatus including a cleaning device and a member to be cleaned.
  • FIG. 5 shows a modification of the cleaning device 18.
  • the cleaning device generally 18A, includes a rib-like flicker 18-1 extending from the inner surface of the unit case 13 into the unit case 13.
  • the flicker 18-1 is held in contact with the circumferential surface of the brush 20 in such a manner as to slightly press the brush 20.
  • the flicker 18-1 has a length in the axial direction of the brush roller 12 slightly greater than the width of the brush 20.
  • FIG. 6 shows another modification of the cleaning device 18.
  • the cleaning device generally 18B, includes a short rib 18-2 and a Mylar ® sheet constituting a flicker 23.
  • the Mylar ® sheet is adhered to the rib 18-2 and held in contact with the brush 20 of the brush roller 12.
  • the flicker 23 has a length in the axial direction of the brush roller 12 slightly greater than the width of the brush 20.
  • the flicker 18-1 or 23 contacting the brush 20 scrapes off toner and other impurities deposited on the brush 20 with its edge.
  • the brush roller 12 can maintain the expected cleaning ability even when impurities deposited on the brush 20 absorb moisture in a high-humidity environment and adhere to the brush 20 or when a great amount of toner deposits on the brush 20 at a time.
  • the body to be cleaned, i.e., the charge roller 2 in the modifications can therefore be maintained clean at all times.
  • the cleaning unit is made up of the brush roller 12, a casing 25, bearing portions 25-2, and the flicker 23.
  • the casing 25 is open at one side facing the brush roller 12 over the entire width and configured to store toner and other impurities scraped off by the brush roller 12.
  • the bearing portions 25-2 protrude from opposite sides of the casing 25 and support the core of the brush roller 12.
  • the flicker 23 is adhered to the lower edge of the opening of the casing 25 at its one edge and extends toward the brush roller 12. The other edge of the flicker 23 is held in contact with the brush 20 of the brush roller 12.
  • the cleaning unit with the above configuration is removably mounted to a process cartridge including the charge roller 2.
  • the bearing portions 25-2 each are formed with an elongate slot extending obliquely downward from the casing 25 toward the charge roller 2.
  • the brush roller 12 therefore tends to move downward due to its own weight, causing the brush 20 to constantly press the charge roller 2 with preselected pressure.
  • the brush roller 12 rotates in the direction G due to the rotation of the charge roller 2.
  • the flicker 18-1 or 23 contacting the brush 20 scrapes off toner and other impurities deposited on the brush 20 with its edge.
  • the toner and other impurities so scraped off are collected in a chamber 25-1 formed in the casing 25 and therefore do not contaminate the inside of the process cartridge or the inside of the apparatus body. This successfully extends the service life of the image forming apparatus. Further, the cleaning unit can be easily, rapidly replaced.
  • FIG. 9 shows a modification of the cleaning unit including a flicker 26 implemented as a screw in place of the flat flicker of the configuration shown in FIGS. 7 and 8 .
  • the flicker 26 implemented as a screw has a length slightly greater than the width of the brush and is driven by drive means not shown.
  • the flicker or screw 26 rotates in contact with the brush 20 to thereby remove toner deposited on the brush 20.
  • the flicker 26 conveys the toner toward the rear end of a casing 27 in the direction perpendicular to the sheet surface of FIG. 9 .
  • the toner is introduced into a waste toner tank, not shown, disposed in the apparatus body via a hole formed in the rear end of the casing 27. It follows that brush roller 12 and the chamber 27-1 of the casing 27 can be maintained clean as if they were new. Again, the cleaning unit can be easily, rapidly replaced.
  • a flicker is held in contact with a body to be cleaned.
  • the flicker therefore allows a brush roller to maintain the expected cleaning ability even when impurities deposited on its brush absorb moisture in a high-humidity environment and adhere to the brush or when a great amount of toner deposits on the brush at a time.
  • the body to be cleaned can therefore be maintained clean at all times.
  • the brush roller and flicker are constructed into a unit together with a casing.
  • Such a unit protects the inside of a process cartridge and the inside of an image forming apparatus from contamination for thereby extending the life of the apparatus.
  • the unit can be easily, rapidly replaced.
  • the flicker when the flicker is implemented as a screw, it not only scrapes off toner, but also conveys the toner to the rear end of the casing.
  • the toner is collected in a waste toner tank via an opening formed in the rear end of the casing. This maintains the brush roller and a chamber formed in the casing clean for thereby extending the life of the image forming apparatus and that of a cleaning unit.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Cleaning In Electrography (AREA)
  • Electrophotography Configuration And Component (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)
EP02019723A 2001-09-04 2002-09-03 Image forming apparatus and cleaning device therefor Expired - Lifetime EP1288738B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001268095 2001-09-04
JP2001268095A JP4931303B2 (ja) 2001-09-04 2001-09-04 クリーニングユニットおよび画像形成装置

Publications (3)

Publication Number Publication Date
EP1288738A2 EP1288738A2 (en) 2003-03-05
EP1288738A3 EP1288738A3 (en) 2003-05-28
EP1288738B1 true EP1288738B1 (en) 2011-11-02

Family

ID=19094129

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02019723A Expired - Lifetime EP1288738B1 (en) 2001-09-04 2002-09-03 Image forming apparatus and cleaning device therefor

Country Status (2)

Country Link
EP (1) EP1288738B1 (ja)
JP (1) JP4931303B2 (ja)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005004070A (ja) * 2003-06-13 2005-01-06 Ricoh Co Ltd クリーニング装置、画像形成装置、プロセスユニット、クリーニング方法及び画像形成方法
US6961534B2 (en) 2003-09-26 2005-11-01 Xerox Corporation Rotating flicker bar for cleaning a rotating cleaner roll and for transmitting power to the cleaner roll
JP4730049B2 (ja) * 2005-10-07 2011-07-20 富士ゼロックス株式会社 画像形成カートリッジ
US7860428B2 (en) 2006-05-16 2010-12-28 Fuji Xerox Co., Ltd. Detachable holding portions in an image forming apparatus
JP4974595B2 (ja) * 2006-07-13 2012-07-11 株式会社リコー 現像装置、プロセスカートリッジ、及び、画像形成装置
JP7293694B2 (ja) * 2019-02-05 2023-06-20 富士電機株式会社 ショーケース

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06282195A (ja) * 1993-03-25 1994-10-07 Toshiba Corp 画像形成装置の定着装置
JPH09211943A (ja) * 1996-02-07 1997-08-15 Ricoh Co Ltd 画像形成装置
JPH09305078A (ja) * 1996-05-15 1997-11-28 Toshiba Corp クリーニング装置および画像形成装置

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Publication number Priority date Publication date Assignee Title
JPS56114979A (en) * 1980-02-16 1981-09-09 Konishiroku Photo Ind Co Ltd Electrostatic recorder
JPS56122076A (en) * 1980-02-29 1981-09-25 Toshiba Corp Cleaning device of electronic copier
JPS59218479A (ja) 1983-05-27 1984-12-08 Fujitsu Ltd 像形成面クリ−ニング装置
JPH0895350A (ja) * 1994-09-28 1996-04-12 Ricoh Co Ltd 画像形成装置の帯電装置
US5842081A (en) 1995-05-31 1998-11-24 Fuji Xerox Co., Ltd. Method and apparatus for charging an electrographic photoreceptor
JP3585151B2 (ja) * 1997-02-27 2004-11-04 株式会社リコー 帯電ブラシローラ、プロセスカートリッジ、電子写真装置
JP2000181309A (ja) * 1998-12-15 2000-06-30 Brother Ind Ltd 画像形成装置
JP3695696B2 (ja) * 2001-01-25 2005-09-14 株式会社リコー クリーニング装置、ユニット及び画像形成装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06282195A (ja) * 1993-03-25 1994-10-07 Toshiba Corp 画像形成装置の定着装置
JPH09211943A (ja) * 1996-02-07 1997-08-15 Ricoh Co Ltd 画像形成装置
JPH09305078A (ja) * 1996-05-15 1997-11-28 Toshiba Corp クリーニング装置および画像形成装置

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Publication number Publication date
EP1288738A2 (en) 2003-03-05
JP2003076240A (ja) 2003-03-14
EP1288738A3 (en) 2003-05-28
JP4931303B2 (ja) 2012-05-16

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