EP1091262A2 - Rouleau de fourniture de toner et son procédé de fabrication - Google Patents

Rouleau de fourniture de toner et son procédé de fabrication Download PDF

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Publication number
EP1091262A2
EP1091262A2 EP00121843A EP00121843A EP1091262A2 EP 1091262 A2 EP1091262 A2 EP 1091262A2 EP 00121843 A EP00121843 A EP 00121843A EP 00121843 A EP00121843 A EP 00121843A EP 1091262 A2 EP1091262 A2 EP 1091262A2
Authority
EP
European Patent Office
Prior art keywords
sponge layer
toner
soft polyurethane
toner supply
supply roll
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP00121843A
Other languages
German (de)
English (en)
Other versions
EP1091262A3 (fr
Inventor
Mitsuyoshi Kondo
Kadai Takeyama
Akitoshi Nozawa
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.)
Sumitomo Riko Co Ltd
Original Assignee
Sumitomo Riko 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 Sumitomo Riko Co Ltd filed Critical Sumitomo Riko Co Ltd
Publication of EP1091262A2 publication Critical patent/EP1091262A2/fr
Publication of EP1091262A3 publication Critical patent/EP1091262A3/fr
Withdrawn legal-status Critical Current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
    • 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
    • G03G2215/08—Details of powder developing device not concerning the development directly
    • G03G2215/0855—Materials and manufacturing of the developing device
    • G03G2215/0858—Donor member
    • G03G2215/0863—Manufacturing

Definitions

  • THE PRESENT INVENTION relates to a toner supply roll for use in a developing unit of an image forming apparatus such as copying machine, a printer or a facsimile machine.
  • an image forming apparatus such as a copying machine, a printer or a facsimile machine is adapted to form an electrostatic latent image on an image carrier, such as an electro-photographic, photo-conductive material or an electro-statographic dielectric material, and to develop the electrostatic latent image into a visible toner image.
  • the developing unit of the apparatus incorporates a toner supply roll for supplying a toner (developer) from a hopper onto the image carrier.
  • a non-magnetic mono-component toner developing system employs a toner supply roll which comprises a shaft and a soft polyurethane sponge layer (urethane foam layer) provided on the outer circumferential surface of the shaft.
  • the soft polyurethane sponge layers maybe of a closed-cell foam structure in which individual cells are predominantly independent of each other, or of an open-cell foam structure in which some of the cells communicate with one another via openings formed in the cell walls. Typically, a substantial proportion of the cells in an open-cell foam structure are actually closed-cells.
  • the soft polyurethane sponge layer of a closed-cells foam structure In use, cells on the surface of the soft polyurethane sponge layer of a closed-cells foam structure are liable to become clogged with degraded toner, so that the toner fluidity is reduced. This reduced fluidity prevents the toner from being smoothly scraped or supplied, which thereby results in fogging, reduction in image density, formation of a ghost image, and like imaging failures.
  • the soft polyurethane sponge layer having the open-cell foam structure the toner easily flows in the surface of the roll, so that the roll surface is constantly supplied with fresh toner and has a satisfactory scrapability.
  • such a sponge layer has a lower hardness.
  • the soft polyurethane sponge layer of the open-cell foam structure is mainly employed for toner supply rolls currently used in practical applications.
  • the toner fluidity in the soft polyurethane sponge layer of the open-cell foam structure is liable to be reduced during a prolonged use because toner is gradually accumulated in the sponge layer. This degrades the toner, and reduces the toner scrapability and the toner supplying capability of the toner supply roll. As a result, the aforesaid imaging failures will tend to occur, particularly near the end of the service life of the toner supply roll.
  • a toner supply roll comprising a shaft, and a soft polyurethane sponge layer provided on an outer circumferential surface of the shaft, the sponge layer defining a plurality of adjacent cells wherein not less than 90% of cell walls defining boundaries between respective adjacent cells have openings.
  • a method of producing a toner supply roll comprising the steps of forming a soft polyurethane sponge layer on an outer circumferential surface of a shaft by foaming a polyurethane material, the sponge layer defining a plurality of adjacent cells, and jetting a high pressure gas onto the soft polyurethane sponge layer so that no less than 90% of cell walls defining boundaries between respective adjacent cells in the soft polyurethane sponge layer have openings.
  • the inventors of the present invention have found that, if the soft polyurethane sponge layer is of the open-cell foam structure, but only a low percentage of cell walls defining boundaries between respective adjacent cells in the sponge layer have openings, the sponge layer fails to ensure sufficient toner fluidity. As a consequence, the cells are liable to be clogged with the toner and thereby promote the degradation of the toner.
  • the inventors have further conducted studies on the openings in the cell walls and consequently found that, if not less than 90% of the cell walls defining the boundaries between the respective adjacent cells have openings, the toner fluidity is properly maintained so that the degradation of the toner during prolonged use can be minimised.
  • a toner supply roll stably maintains toner scrapability and toner supply capability, whereby formation of high quality images can be ensured for an extended period of time.
  • the toner fluidity can be stably maintained during prolonged use, even if the average cell diameter D is reduced, if the soft polyurethane sponge layer has an air permeability A (cc/min.cm 2 ) and an average cell diameter D ( ⁇ m) which satisfy a relationship represented by A/D>7 .
  • the average cell diameter of the soft polyurethane sponge layer is within a particular range such as 100 ⁇ m to 500 ⁇ m, reduction in the toner fluidity and uneven toner supply can be further suppressed.
  • the soft polyurethane sponge layer has a hardness within a particular range, such as 50 g to 500 g, reduction in the toner scrapability and degradation of the toner can be further suppressed.
  • a toner supply roll according to the present invention comprises a shaft 1 and a soft polyurethane sponge layer 2 provided on an outer circumferential surface of the shaft 1.
  • the soft polyurethane sponge layer 2 contains cells 3, three-dimensionally connected to one another via openings formed in cell walls 4.
  • reference numeral 6 denotes a cell frame.
  • the construction of the shaft 1 is not particularly limited, but a solid metal core bar or a hollow metal cylinder may be employed, as the shaft 1.
  • a material for the shaft 1 include stainless steel, aluminum and plated iron.
  • a polyurethane material for the soft polyurethane sponge layer 2 is formed from materials comprising a polyol component and an isocyanate component of types which are commonly employed for the production of a soft polyurethane foam.
  • the polyol component include polyether polyols, polyester polyols and polymer polyols, which may be used either alone or in combination.
  • the isocyanate component is not particularly limited as long as it is a polyisocyanate having two or more functional groups, and examples thereof include 2,4- or 2,6-tolylene diisocyanate (TDI), o-toluidine diisocyanate (TODI), naphthylene diisocyanate (NDI), xylylene diisocyanate (XDI), 4,4'-diphenylmethane diisocyanate (MDI), carbodiimide-modified MDI, polymethylene polyphenyl isocyanate and polymeric polyisocyanates, which may be used either alone or in combination.
  • TDI 2,4- or 2,6-tolylene diisocyanate
  • TODI o-toluidine diisocyanate
  • NDI naphthylene diisocyanate
  • XDI xylylene diisocyanate
  • MDI 4,4'-diphenylmethane diisocyanate
  • a cross-linking agent water, a low boiling-point substance, a gas or the like
  • a surfactant e.g., sodium bicarbonate
  • a catalyst e.g., sodium bicarbonate
  • a flame retardant e.g., sodium bicarbonate
  • a filler e.g., sodium bicarbonate
  • a conductivity imparting agent e.g., sodium bicarbonate
  • an anti-static agent and the like may be blended with the polyurethane material including the polyol component and the isocyanate component.
  • the soft polyurethane sponge layer 2 is of an open-cell foam structure in which the cells defined by the cell frame 6 are three-dimensionally connected to one another and not less than 90% of the cell walls 4 defining boundaries between respective adjacent cells have openings 5. If the percentage is lower than 90%, the sponge layer fails to ensure sufficient toner fluidity and, therefore, is liable to be clogged with the toner. Clogging promotes the degradation of the toner, making it impossible to ensure formation of high quality images for an extended period of time.
  • the percentage of the cell walls having openings with respect to the total cell walls defining the boundaries between the respective adjacent cells is determined, for example, in the following manner.
  • the soft polyurethane sponge layer is first cut into a section, and then the number of the cell walls having openings in the section is counted with the use of an optical microscope as well as the total number of cells.
  • the percentage of the cell walls having openings with respect to the total number of the cell walls is then calculated.
  • the percentage is an average of values of the percentage obtained on several sections taken in two directions, i.e., axially and circumferentially (or perpendicularly to the axis) of the toner supply roll.
  • the toner supply roll according to the present invention can be produced, for example, in the following manner.
  • a mold is prepared which comprises a hollow cylindrical member 21 having a length substantially equal to the length of the soft polyurethane sponge layer 2 of the toner supply roll, and caps 22, 23 for closing opposite ends of the hollow cylindrical member 21.
  • caps 22, 23 for closing opposite ends of the hollow cylindrical member 21.
  • a mold cavity 24 which provides an intended final shape (outer diameter) of the toner supply roll is defined in the mold.
  • the polyurethane material is injected into the mold cavity 24 and then foamed and solidified.
  • the resulting product as removed from the mold comprises the shaft 1 and a soft polyurethane sponge layer 2 formed on an outer circumferential surface of the shaft 1.
  • a high pressure gas air, nitrogen gas or a like gas
  • the high pressure gas diffuses into the soft polyurethane sponge layer 2 alongside the shaft 1 which serves as a resistance, thereby efficiently breaking through the walls of the cells in the soft polyurethane sponge layer 2 thereby forming openings in the cell walls.
  • the toner supply roll is provided in which not less than 90% of the cell walls 4 defining the boundaries between the respective adjacent cells in the soft polyurethane sponge layer 2 have openings 5.
  • the toner supply roll according to the present invention may be produced, for example, by forming the soft polyurethane sponge layer 2 on the outer circumferential surface of the shaft 1 in the aforesaid manner and then performing a so-called roll crushing process.
  • a counter metal roller is pressed against the soft polyurethane sponge layer 2 so as to depress the sponge layer by not less than 30%, preferably not less than 50%, of the thickness thereof while being rotated in the same direction or in the opposite direction with respect to the shaft 1.
  • the method for the formation of the soft polyurethane sponge layer 2 on the outer circumferential surface of the shaft 1 is not limited to the aforesaid method which employs the mold shown in Fig. 2, but an ordinary slab forming method may also be employed.
  • the method for breaking through the cell-walls for forming openings in not less than 90% of the cell walls defining the boundaries between the respective adjacent cells is not limited to the high pressure jetting process and the roll crushing process described above, but other exemplary methods therefor include a method of removing the cell walls during the foam molding, a method of treating the cell, walls with a chemical agent such as an alkaline solution, and a method of removing the cell walls by utilizing the explosive energy of an explosive gas.
  • the soft polyurethane sponge layer has an air permeability A and an average cell diameter D which preferably satisfy the relationship represented by A/D>7 .
  • A/D>7 the toner fluidity can stably be maintained during prolonged use, even if the average cell diameter D is reduced.
  • the soft polyurethane sponge layer preferably has an average cell diameter D of about 100 ⁇ m to 500 ⁇ m, particularly preferably about 200 ⁇ m to 400 ⁇ m. If the average cell diameter D is smaller than about 100 ⁇ m, the toner fluidity may be reduced. On the other hand, if the average cell diameter D is greater than about 500 ⁇ m, uneven toner supply may occur.
  • the average cell diameter D is determined, for example, by taking a photograph of a section of the soft polyurethane sponge layer by means of an optical microscope and a CCD camera, counting the number of cells aligned on a line of a given length ( ⁇ m), and dividing the length by the number of cells.
  • the shape of the cells in the soft polyurethane sponge layer is not particularly limited, but may be either elliptical or circular.
  • the soft polyurethane sponge layer preferably has an air permeability A of not less than about 2,000 cc/min ⁇ cm 2 , particularly preferably about 3,000 cc/min ⁇ cm 2 .
  • the air permeability A can be determined with the use of an apparatus as shown in Fig. 3. More specifically, a sample 31 of the soft polyurethane sponge layer cut out of the toner supply roll to have an axial length of about 25 mm is first press-fitted in a cylinder 32 having an inner diameter which is slightly smaller than the outer diameter of the sample 31. Then, one of opposite ends of the cylinder 31 is exposed to atmosphere, while the other end is connected to a vacuum pump 34 via a flow meter 33.
  • the soft polyurethane sponge layer of the toner supply roll according to the present invention preferably has a hardness of about 50 g to 500 g, particularly preferably about 100 g to 350 g. If the hardness is less than about 50 g, toner scrapability is not sufficient. On the other hand, if the hardness is greater than about 500 g, degradation of the toner is accelerated.
  • the hardness of the soft polyurethane sponge layer is determined, for example, in the following manner. As shown in Fig. 4(a), the opposite ends of a shaft 41 of the toner supply roll are supported, and the soft polyurethane sponge layer 42 is depressed at a rate of 10 mm/min by means of a jig 43 having a planar depression surface (50 mm x 50 mm, and a thickness of 7 mm). The hardness is determined by the load (g) applied to the sponge layer when the sponge layer is depressed by 1 mm. The load is an average of values of the load obtained at eight (2 x 4) measuring points located in a circumferentially 90-degree spaced relation along two circumferential lines axially spaced from each other. A higher average load means that the soft polyurethane sponge layer 42 has a higher hardness, i.e., is harder.
  • the soft polyurethane sponge layer preferably has the smallest possible density, but the density is typically within a range between about 0.05 g/cm 3 and 0.3 g/cm 3 .
  • the soft polyurethane sponge layer typically has a thickness of about 2 mm to 8 mm, preferably about 3 mm to 5 mm.
  • polyurethane materials A to C were prepared according to the formulations shown in Table 1. (Parts by weight) Formulation Polyurethane materials A B C Polyether polyol 90 90 90 Polymer polyol 10 10 10 Diethanolamine 2 2 - Silicon foam stabilizer 3 - 3 Silicon foam stabilizer - 0.1 - Water 2 2 2 Tertiary amine catalyst 0.5 0.5 0.5 Tertiary amine catalyst 0.1 0.1 0.1 DBTDL 0.1 - - Isocyanate 32.5 32.5 26.9
  • a mold as shown in Fig. 2 was prepared, and a shaft 1 (a metal core bar of SUS304 having a diameter of 5 mm) was placed in a hollow cylindrical body 21. Then, the polyurethane material A was injected into a mold cavity 24 of the mold, and was foamed and solidified. Thereafter, the resulting product was removed from the mold. Thus, a soft polyurethane sponge layer having a thickness of 5.5 mm was formed on an outer circumferential surface of the shaft 1.
  • a toner supply roll was produced in substantially the same manner as in Example 1, except that the polyurethane material B was used and the rotational speed of the metal core rod was 600 RPM.
  • a toner supply roll was produced in substantially the same manner as in Example 1, except that the polyurethane material C was used and the rotational speed of the metal core rod was 600 RPM and the air pressure for the air jetting process was 0.6 MPa.
  • a toner supply roll was produced in substantially the same manner as in Example 1, except that the air pressure for the air jetting process was 0.3 MPa.
  • a toner supply roll was produced in substantially the same manner as in Example 1, except that the soft polyurethane sponge layer was not subjected to the air jetting process.
  • a toner supply roll was produced in substantially the same manner as in Example 2, except that the soft polyurethane sponge layer was not subjected to the air jetting process.
  • a toner supply roll was produced in substantially the same manner as in Example 1, except that the air pressure for the air jetting process was 0.2 MPa.
  • the toner supply rolls having an outer diameter of 16 mm were each set in a laser beam printer.
  • a toner having an average particle diameter Examples 1 2 3 4 Polyurethane material A B C A Percentage of open cell walls(%) >95 >95 >95 90 Air permeability A (cc/min ⁇ cm 2 ) 2,800 3,200 4,500 2,400 Average cell diameter D ( ⁇ m) 320 370 460 320 A/D 8.8 8.6 9.8 7.5 Hardness (g) 380 340 270 380 Image evaluation At initial stage ⁇ ⁇ ⁇ ⁇ After 5,000 copies were printed ⁇ ⁇ ⁇ ⁇ Comparative Examples 1 2 3 Polyurethane material A B A Percentage of open cell walls(%) 70 80 87 Air permeability A (cc/min ⁇ cm 2 ) 1,800 1,500 2,000 Average cell diameter D ( ⁇ m) 320 370 320 A/D 5.6 4.1 6.3 Hardness (g) 380 350 380 Image evaluation At initial stage ⁇ ⁇ ⁇ After 5,000 copies were
  • a solid portion of an image printed out at the initial stage of the printing test was compared with a solid portion of an image printed out at the end of the printing test.
  • the evaluation criteria are as follows: the mark “ ⁇ ” indicates that a reduction in image density was not greater than 10% and no streaking was observed; the mark “ ⁇ ” indicates that a reduction in image density was greater than 10% but not greater than 25% and some streaking was observed; and the mark “X” indicates that a reduction in image density was greater than 25% but not greater than 50% and some streaking was observed.
  • the soft polyurethane sponge layer of the toner supply roll according to the present invention is of the open-cell roam structure in which the cells are three-dimensionally connected to one another via the openings in the cell walls, so that air contained in the sponge layer smoothly flows out when the sponge layer is depressed. Therefore, the sponge layer has a lower hardness than a soft polyurethane sponge layer of a closed-cell foam structure. Since not less than 90% of the cell walls defining the boundaries between the respective adjacent cells have openings, toner fluidity can properly be maintained. Therefore, the toner supply roll can minimize degradation of the toner during prolonged use and can stably maintain the toner scrapability and the toner supplying capability, thereby ensuring the formation of high quality images for an extended period of time.
  • the toner supply roll according to the present invention which ensures formation of high quality images for an extended period of time, can be produced very easily by foaming the polyurethane material on the outer circumferential surface of the shaft so as to form the soft polyurethane sponge layer and then jetting a high pressure gas onto the sponge layer.
  • toner fluidity can be stably maintained during prolonged use, even if the average cell diameter D is reduced.
  • the average cell diameter of the soft polyurethane sponge layer is within the defined range, the reduction in toner fluidity and uneven toner supply can further be suppressed.
  • the hardness of the soft polyurethane sponge layer is within the defined range, reduction in toner scrapability of the toner supply roll and degradation of the toner can further be suppressed.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Dry Development In Electrophotography (AREA)
EP00121843A 1999-10-08 2000-10-06 Rouleau de fourniture de toner et son procédé de fabrication Withdrawn EP1091262A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP28795599 1999-10-08
JP28795599A JP2001109251A (ja) 1999-10-08 1999-10-08 トナー供給ロールおよびその製法

Publications (2)

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EP1091262A2 true EP1091262A2 (fr) 2001-04-11
EP1091262A3 EP1091262A3 (fr) 2004-01-14

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EP00121843A Withdrawn EP1091262A3 (fr) 1999-10-08 2000-10-06 Rouleau de fourniture de toner et son procédé de fabrication

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101819395A (zh) * 2007-06-29 2010-09-01 佳能株式会社 成像设备、显影设备和处理盒
US7962057B2 (en) 2007-06-29 2011-06-14 Canon Kabushiki Kaisha Developing apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5055032B2 (ja) * 2007-06-14 2012-10-24 キヤノン化成株式会社 ポリウレタンフォームローラの製造方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0597444A1 (fr) * 1992-11-09 1994-05-18 Konica Corporation Rouleau de guidage de toner pour procédé de formation d'images et appareil de mise en oeuvre
US5548382A (en) * 1989-08-01 1996-08-20 Fujitsu Limited Developing apparatus for improving the durability of the latent image holding member
EP0789285A2 (fr) * 1996-02-06 1997-08-13 Tokai Rubber Industries, Ltd. Rouleau de fourniture de toner ayant des ouvertures dans la couche superficielle, d'une structure cylindrique en éponge en polyréthane poreuse, et son procédé de fabrication
JPH11230157A (ja) * 1998-02-20 1999-08-27 Tokai Rubber Ind Ltd ウレタンスポンジロール及びその製造方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5548382A (en) * 1989-08-01 1996-08-20 Fujitsu Limited Developing apparatus for improving the durability of the latent image holding member
EP0597444A1 (fr) * 1992-11-09 1994-05-18 Konica Corporation Rouleau de guidage de toner pour procédé de formation d'images et appareil de mise en oeuvre
EP0789285A2 (fr) * 1996-02-06 1997-08-13 Tokai Rubber Industries, Ltd. Rouleau de fourniture de toner ayant des ouvertures dans la couche superficielle, d'une structure cylindrique en éponge en polyréthane poreuse, et son procédé de fabrication
JPH11230157A (ja) * 1998-02-20 1999-08-27 Tokai Rubber Ind Ltd ウレタンスポンジロール及びその製造方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 13, 30 November 1999 (1999-11-30) -& JP 11 230157 A (TOKAI RUBBER IND LTD), 27 August 1999 (1999-08-27) *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101819395A (zh) * 2007-06-29 2010-09-01 佳能株式会社 成像设备、显影设备和处理盒
US7962057B2 (en) 2007-06-29 2011-06-14 Canon Kabushiki Kaisha Developing apparatus
US7991315B2 (en) 2007-06-29 2011-08-02 Canon Kabushiki Kaisha Developing apparatus and image forming apparatus including the same
EP2009513A3 (fr) * 2007-06-29 2011-12-28 Canon Kabushiki Kaisha Appareil de développement et appareil de formation d'images comprenant celle-ci
EP2009512A3 (fr) * 2007-06-29 2011-12-28 Canon Kabushiki Kaisha Appareil de développement contenant un applicateur avec une fonction de détection de quantité de développateur
US8160464B2 (en) 2007-06-29 2012-04-17 Canon Kabushiki Kaisha Developing apparatus
US8175476B2 (en) 2007-06-29 2012-05-08 Canon Kabushiki Kaisha Developing apparatus
US8285166B2 (en) 2007-06-29 2012-10-09 Canon Kabushiki Kaisha Developing apparatus
US8463148B2 (en) 2007-06-29 2013-06-11 Canon Kabushiki Kaisha Developing apparatus
CN101819395B (zh) * 2007-06-29 2014-07-30 佳能株式会社 成像设备、显影设备和处理盒
EP2527926A3 (fr) * 2007-06-29 2015-07-22 Canon Kabushiki Kaisha Appareil de développement contenant rouleaux de développateur et détecteur

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Publication number Publication date
JP2001109251A (ja) 2001-04-20
EP1091262A3 (fr) 2004-01-14

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