WO2003010608A1 - Porteur de revelateur cylindrique et procede de production - Google Patents

Porteur de revelateur cylindrique et procede de production Download PDF

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Publication number
WO2003010608A1
WO2003010608A1 PCT/JP2002/007056 JP0207056W WO03010608A1 WO 2003010608 A1 WO2003010608 A1 WO 2003010608A1 JP 0207056 W JP0207056 W JP 0207056W WO 03010608 A1 WO03010608 A1 WO 03010608A1
Authority
WO
WIPO (PCT)
Prior art keywords
alumite layer
developer carrier
cylindrical developer
fine particles
carrier according
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/JP2002/007056
Other languages
English (en)
Japanese (ja)
Inventor
Toshio Tsubota
Yasushi Iguchi
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.)
Fuji Electric Imaging Device Co Ltd
Original Assignee
Fuji Electric Imaging Device 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 Fuji Electric Imaging Device Co Ltd filed Critical Fuji Electric Imaging Device Co Ltd
Priority to US10/484,694 priority Critical patent/US20050065006A1/en
Publication of WO2003010608A1 publication Critical patent/WO2003010608A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • G03G15/06—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
    • G03G15/0818—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 structure of the donor member, e.g. surface properties
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49544—Roller making
    • Y10T29/4956—Fabricating and shaping roller work contacting surface element

Definitions

  • the present invention relates to a cylindrical developer carrier and a method for producing the same.
  • the present invention relates to a cylindrical developer carrier mounted on an electrophotographic apparatus such as an electrophotographic printer, a copying machine, and a facsimile.
  • an electrophotographic apparatus such as an electrophotographic printer, a copying machine, and a facsimile.
  • Electrophotographic devices such as laser printers, LED printers, and plain paper copiers form images by the so-called Carlson process.
  • the Carlson process is a cycle of an electrophotographic process using members such as charging, exposure, toner development, transfer, and charge removal arranged on the peripheral surface of a cylindrical photoreceptor with a photosensitive layer having a photoconductive function. This is an image forming method for outputting by fixing the toner image transferred to the printer.
  • the toner in the developing device is cylindrically developed.
  • the latent image on the surface of the photoreceptor is carried and conveyed to the vicinity of the surface of the photoreceptor by using an electrostatic force through an agent carrier, that is, a developing sleeve.
  • an agent carrier that is, a developing sleeve.
  • the surface condition is also important to uniformly and uniformly distribute the toner on the surface of the developing sleep. With such surface condition Therefore, a smooth surface is not always the best, and it is said that it is better to provide unevenness of an appropriate size to provide an appropriate frictional force between the sleeve and the toner.
  • the convexity has a problem that, depending on the hardness of the developing sleeve material, it is worn after repeated use and the image gradually deteriorates.
  • the developing sleeve material is an aluminum alloy
  • its Vickers hardness is as small as about 7 OHv, so after forming M convex on the surface, the Vickers hardness is as large as about 200 Hv to 400 Hv.
  • the abrasion resistance 1 to the raw material is improved (see JP-A-5-46008).
  • the alumite layer is provided on the surface of the developing sleeve, the surface resistance increases due to the insulating properties of the alumite layer.
  • the charge of the toner corresponding to the image forming portion during the previous image forming process is not sufficiently moved from the developing sleeve side to the photosensitive member surface side, and tends to remain.
  • the charge amount of the image forming corresponding portion is larger than the charge amount of the non-image forming corresponding portion.
  • the developing agent is more strongly attracted to the portion of the developing sleeve having a high charge amount, so that it is difficult for the image forming corresponding portion to move to the photosensitive member surface side.
  • a density difference having a pattern corresponding to the image in the previous development process, a so-called ghost image was found on the developed image of the photoreceptor j-law. In the present invention, this is also referred to as memory).
  • the toner is sufficiently triboelectrically charged on the developing sleeve, and can be carried and transported as a uniform layer without bias. It is an object of the present invention to provide a cylindrical developer carrier that does not cause a difference in developing ability according to the history, and a method for manufacturing the same. Disclosure of the invention According to the present invention, there is provided a cylindrical developer carrier having an alumite layer coated on a uniformly roughened surface of a conductive substrate, wherein the alumite layer uniformly has micropores reaching the substrate. The object is achieved by making the body.
  • the conductive substrate is a cylindrical developer carrier mainly composed of an aluminum-based metal material.
  • a cylindrical developer carrier in which the alumite layer is an alumite layer formed by an anodizing method.
  • the alumite layer is a cylindrical developer carrier having an alumite layer sealed with nickel acetate.
  • a cylindrical developer carrier having an alumite layer thickness of 2 to 5 ⁇ m.
  • the cylindrical developer carrier according to any one of claims 1 to 4, wherein the micropores have an area of 10 to 50% of an alumite layer forming region. .
  • the surface of the conductive substrate is uniformly roughened by blasting with spherical fine particles, and after forming an alumite layer by anodic oxidation, the diameter of the conductive substrate is larger than that of the spherical fine particles. It is appropriate to use a method for producing a cylindrical developer carrying member that is blasted with shaped fine particles.
  • the surface of the conductive substrate is blasted using glass beads as the spherical fine particles, and after the alumite layer is formed by anodic oxidation, the diameter of the aluminum oxide is larger than that of the spherical fine particles. It is more appropriate to use a method for producing a cylindrical developer carrier that is blasted with amorphous particles as a component.
  • blasting is performed with amorphous fine particles having aluminum oxide as a main component and having a diameter larger than that of the spherical fine particles. That is even more appropriate.
  • FIG. 1 is a perspective view of a developer carrier according to the present invention.
  • FIG. 2 is a partially enlarged sectional view of the developer carrier according to the present invention.
  • FIG. 3 is a schematic configuration diagram of an image forming apparatus equipped with the developer carrier according to the present invention.
  • FIG. 1 is a perspective view of a cylindrical developer carrier, that is, a developing sleeve 11 according to the present invention
  • FIG. 2 is a partially enlarged sectional view of the developing sleeve 11
  • FIG. 3 is a view of the developing sleeve 11 according to the present invention.
  • FIG. 1 is a schematic configuration diagram of an image forming apparatus 100 to be mounted, a developing device including a roller charging member 3, an exposure source 4, a developing container 5 and a developing sleep 11 on an outer peripheral surface of a photoconductor 10, a transfer device 6, This indicates that an electrophotographic process member such as the static eliminator 7 is provided.
  • the electrophotographic processes are sequentially performed by the members arranged on the peripheral surface of the cylindrical electrophotographic organic photoconductor 10.
  • the image formation is performed.
  • a voltage is applied to a roller charging member 3 arranged in contact with the electrophotographic photoreceptor 10 to charge the surface of the photoreceptor 10, and the image exposure means 4 corresponds to the original.
  • Photoreceptor 1 An image is exposed to 0 to form an electrostatic latent image.
  • the electrostatic latent image on the photoconductor 10 is transferred by electrostatically transferring the toner stirred and charged in the developing container 5 to the surface of the photoconductor 10 via the development sleep 11 and attaching the toner.
  • Develop (visualize) Further, the toner image formed on the photoconductor 10 is transferred by a transfer charger 6 onto a transfer material such as paper supplied through a paper feed roller and a paper feed guide, and is not transferred to the transfer material by a cleaner. Then, the remaining toner remaining on the photoconductor 10 is collected. If residual charges remain inside the photoreceptor, it is better to apply an appropriate voltage to the photoreceptor 10 by the charge removing means 7 to remove the charge or remove the charge using light.
  • the transfer material on which the toner image has been formed is sent to a fixing device (not shown) by the transport unit, where the toner image is fixed and output as an image.
  • the light g of the image exposing means 4 can be halogen light, fluorescent light, laser light, or the like. Other auxiliary processes may be added as needed.
  • This image forming apparatus 100 can be widely applied not only to copying machines but also to electrophotographic application fields such as laser beam printers and electrophotographic plate making systems.
  • the developing sleeve 11 has a shape having a sleeve supporting portion on both sides of a sleeve-shaped conductive base 1 having a diameter of 20 mm, and is made of aluminum alloy. Is used. This diameter may be appropriately changed depending on the device to be mounted. Usually, the diameter is often in the range of 10 to 25 mm. In this example, the composition of the alloy used was JIS standard A6063 material, but may be A5506 material or 3003 material.
  • the surface of the aluminum sleep base 1 is smoothened by cutting or grinding the surface of a raw tube formed by extrusion and drawing of an aluminum alloy ingot using a cutting tool or a grindstone.
  • the surface of the sleeve substrate 1 was blasted, and the average surface roughness Ra was determined. 0.8 to 1.5 m. If the average roughness is larger than 1.5 ⁇ m, the toner will remain in the concave and convex portions, and if the average roughness is smaller than 0.8 m, the toner will be too smooth, causing insufficient triboelectric charging of the toner and insufficient toner concentration. In other words, there is a problem that an appropriate image density cannot be obtained. Further, there is a problem that the toner layer is liable to be biased due to slippage of the toner and it is difficult to form a uniform layer.
  • the anodized aluminum layer 2 is formed on the surface of the sleeve substrate 1 on which the irregularities having the predetermined size are formed by the anodizing method, and the sealing process is performed.
  • the sealing treatment is preferably a Huckel acetate sealing, but the effect of the present invention can also be obtained by a sealing treatment using a croaker.
  • the thickness of the alumite layer is preferably in the range of 2 to 5 ⁇ m. If it is thicker than 5 ⁇ m, it will be difficult to uniformly and innumerably form the fine holes 21 reaching the aluminum substrate 1 according to the present invention later. If the thickness is less than 2 ⁇ m, the alumite layer wears quickly and the durability deteriorates.
  • the formation of the fine pores 21 after the formation of the alumite layer 2 is performed by a plast treatment of amorphous aluminum oxide (alumina) fine particles having a higher hardness than alumite. Fine particles of other materials may be used as long as they are harder than alumite.
  • the particle size of the alumina fine particles (for example, # 320) having a diameter larger than that of the glass beads (for example, # 600) is used.
  • the purpose of the blast treatment after the formation of the alumite layer 2 is to remove as much as possible the alumite layer 2 on the protrusions of the alumite layer 2 and to provide countless and uniform micro holes 21 reaching the aluminum substrate 1. Further, by uniformly providing a myriad of leak sites for the charge of the toner, the surface resistance of the alumite layer 2 is reduced, and the above-described problem of the difference in developing ability according to the development history is solved.
  • the following experiment was conducted in order to obtain an appropriate area ratio of the fine pores formed mainly in the projections of the above-described irregularities of the alumite layer 2 to the entire alumite layer 2 formation region.
  • Each of the developing sleeves 1 having a total area ratio of the micropores 21 to the layer 2 area of 5%, 10%, 20%, 40%, 50%, 60%, 70%, 100%
  • One sample was prepared, and image evaluation and sleeve life were examined.
  • the total micropore area ratio was determined by using the difference in the light reflectance between the alumite layer 2 region and the micropore 21. Specifically, it was determined by using a light reflectometer and a calibration curve created from a sample known in advance. Alternatively, the area ratio may be obtained from an enlarged photograph of the sleeve surface. The results are shown in the table below.
  • the image density was measured with a Macbeth densitometer, with a value of 1.3 or more marked as ⁇ , a value of 1.2 to 1.3 as ⁇ , and a value of 1.2 or less as X. From this image density evaluation, it can be seen that the toner is sufficiently triboelectrically charged on the developing sleeve, and is carried and transported as a uniform layer without bias.
  • the life of the sleeve was rated ⁇ for durability of 20,000 or more, ⁇ for 10,000 to 20,000, and X for 10,000 or less. From this life, it is possible to determine whether there is a change (or deterioration) in the characteristics of the previous two evaluations after initial use and after repeated use of a predetermined number of sheets.
  • a cylindrical developer carrier having an alumite layer coated on a uniformly roughened conductive substrate surface, wherein the alumite layer uniformly has micropores reaching the substrate. Therefore, even after repeated use, the toner is sufficiently triboelectrically charged on the developing sleeve, and can be carried and transported as a uniform layer without deviation, and there is no difference in developing ability according to the development history.
  • a cylindrical developer carrier can be provided.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Dry Development In Electrophotography (AREA)
  • Magnetic Brush Developing In Electrophotography (AREA)
  • Rolls And Other Rotary Bodies (AREA)

Abstract

La présente invention concerne un porteur de révélateur cylindrique pourvu d'une couche d'alunite recouvrant une surface de substrat conducteur uniformément rugueuse, cette couche d'alunite étant uniformément dotées de pores ouverts sur le substrat. La poudre de toner peut ainsi être suffisamment frottée et électrifiée sur un manchon de révélateur et transportée sous forme de couche uniforme sans déviation après des utilisations répétées, et aucune différence ne survient dans les capacités développatrices indépendamment d'un historique de développement.
PCT/JP2002/007056 2001-07-24 2002-07-11 Porteur de revelateur cylindrique et procede de production Ceased WO2003010608A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10/484,694 US20050065006A1 (en) 2001-07-24 2002-07-11 Cylindrical developer carrier and production method thereof

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001-222884 2001-07-24
JP2001222884A JP2003035992A (ja) 2001-07-24 2001-07-24 円筒状現像剤担持体およびその製造方法

Publications (1)

Publication Number Publication Date
WO2003010608A1 true WO2003010608A1 (fr) 2003-02-06

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2002/007056 Ceased WO2003010608A1 (fr) 2001-07-24 2002-07-11 Porteur de revelateur cylindrique et procede de production

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US (1) US20050065006A1 (fr)
JP (1) JP2003035992A (fr)
WO (1) WO2003010608A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4682093B2 (ja) * 2005-09-16 2011-05-11 株式会社リコー 現像ローラ、現像装置、プロセスカートリッジ及び画像形成装置
JP5172182B2 (ja) 2007-03-20 2013-03-27 京セラドキュメントソリューションズ株式会社 画像形成装置
US8500616B2 (en) * 2007-10-09 2013-08-06 Lexmark International, Inc. Toner mass control by surface roughness and voids
JP5247229B2 (ja) * 2008-05-14 2013-07-24 京セラドキュメントソリューションズ株式会社 画像形成装置
JP2012068334A (ja) 2010-09-22 2012-04-05 Kyocera Mita Corp 画像形成装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5857165A (ja) * 1981-09-30 1983-04-05 Canon Inc 現像装置
JPS63116163A (ja) * 1986-11-04 1988-05-20 Minolta Camera Co Ltd 積層型感光体
JPH04145674A (ja) * 1990-10-08 1992-05-19 Nec Corp 電歪効果素子及びその製造方法
JPH0546008A (ja) * 1991-08-09 1993-02-26 Matsushita Electric Ind Co Ltd 粉体担持体

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4380966A (en) * 1980-10-11 1983-04-26 Canon Kabushiki Kaisha Development apparatus
US4800144A (en) * 1986-11-04 1989-01-24 Minolta Camera Kabushiki Kaisha Laminated type photosensitive member for electrophotography comprising a substrate of aluminate

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5857165A (ja) * 1981-09-30 1983-04-05 Canon Inc 現像装置
JPS63116163A (ja) * 1986-11-04 1988-05-20 Minolta Camera Co Ltd 積層型感光体
JPH04145674A (ja) * 1990-10-08 1992-05-19 Nec Corp 電歪効果素子及びその製造方法
JPH0546008A (ja) * 1991-08-09 1993-02-26 Matsushita Electric Ind Co Ltd 粉体担持体

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US20050065006A1 (en) 2005-03-24
JP2003035992A (ja) 2003-02-07

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