CN1277159C - Method for manufacturing developer roller - Google Patents
Method for manufacturing developer roller Download PDFInfo
- Publication number
- CN1277159C CN1277159C CN01823473.9A CN01823473A CN1277159C CN 1277159 C CN1277159 C CN 1277159C CN 01823473 A CN01823473 A CN 01823473A CN 1277159 C CN1277159 C CN 1277159C
- Authority
- CN
- China
- Prior art keywords
- graphite
- wetting agent
- polymkeric substance
- solvent
- developer 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.)
- Expired - Lifetime
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- 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
- G03G15/09—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush
- G03G15/0921—Details concerning the magnetic brush roller structure, e.g. magnet configuration
- G03G15/0928—Details concerning the magnetic brush roller structure, e.g. magnet configuration relating to the shell, e.g. structure, composition
Abstract
The present invention relates to a method for manufacturing a developing roller, wherein a wetting agent is added into a polymer and graphite to ensure the graphite to be thoroughly dispersed. The further improvement of the developing roller is obtained by spraying surface layer of the graphite and the wetting agent and polishing the surface layer after spraying. The additional discovered improvement of the developing roller is to adopt a multi-step spraying thin layer to improve the adhesiveness among sprayed coating layers.
Description
Technical field
The present invention relates to be used for the developer roll of imaging device, more specifically relate to make the method for developer roll.
Background technology
The present invention relates to a kind of manufacturing and be used for, the method for the developer roll of type in photoprinter or the facsimile recorder imaging device such as laser printer.Many this type of imaging devices adopt identical basic fundamental.These devices are to adopt known toner to print off image on paper or other media substantially.Toner is dry fine powder material.Toner is chargeable, and has polarity.Toner is accommodated in the container that is called the look bucket usually, and shifts to photosensitive drums that comprises latent image or band from the look bucket.Latent image is a zone that changes electric charge that has the shape that will form image on the drum.Toner is adsorbed onto on the latent image by electric charge.Then, the toner of latent image shape is transferred on the page of paper or media, and fusion is on paper or media.
Toner is transferred to the photosensitive drums of adjacent area or is with from the look bucket by developer roll.Developer roll can be used for magnetic or nonmagnetic toner.The developer roll of most conventional type is the magnetic developer roll, and the Hewlett-Packard's laser printer series that is used for using always.
The magnetic developer roll also has the toner that electric power attracts and uses with both having magnetic.A kind of United States Patent (USP) by people such as Mott registration has been described a kind of example early for 3,219, No. 014.These developer rolls are substantially the rotatable hollow cylinder around fixing permanent magnet.These developer rolls adopt various material, but no matter adopt what material, all developer rolls all must present some specific performance properties.The first, the developer roll surface must have electric conductivity.The second, the institutional framework that roller must have the energy electrification by friction and carry toner.The developer roll of motion and the friction between scraping blade or the similar device are given toner by electrification by friction with charge transfer.The 3rd, developer roll must be enough durable, all to have good performance in the whole life of toner casket.The 4th, developer roll must have good release characteristics, makes toner on the developer roll can leave developer roll and transfers on the latent image on the photosensitive drums.The 5th, attract corresponding to electric power, if developer roll is the magnetic developer roll, developer roll should be a magnetic, the magnetic field that produces with not interference center arrives on the developer roll.The key issue of making developer roll is the balance of durability and apparent mass.The method that addresses these problems comprises the developer roll that uses metalline, for example described in No. 5,749,033, the United States Patent (USP) of Swartz etc. like that.This type of developer roll has conduction, durable and release characteristics, can constitute by the blasting treatment to matrix.Use conductive plastic material as the developer roll surface in addition in addition.A kind of this type of roller is at the United States Patent (USP) 5,659,862 that licenses to Mahmud and license in another part United States Patent (USP) 4,989,044 of Nishimura and be described.
These formerly the developer roll of technology can not obtain fully to make toner from developer roll easily transfer to photosensitive drums or with on release characteristics.Improve its release characteristics, the transfer effect of toner can improve, and obtains better print result under the toner situation that expends still less.About the developer roll of plastic coat, what need most consideration is balanced electric conductivity in developer roll surface and the following balanced capacitance-resistance amount in the surface of following.In addition, formerly the plastic coating developer roll of technology adopts phenolics as jointing material, and phenolics is frangible, and wearing and tearing are very fast.The improved developer roll method for making of the present invention's description and the developer roll of made solve these problems and have very high toner transfer efficiency when keeping higher fastness to rubbing.
Summary of the invention
Developer roll of the present invention has the matrix of a conduction, the matrix of this conduction is involved have powder fine lapping graphite and wetting agent polymkeric substance composite bed around.These layers form through the multistep spraying.In a preferred embodiment, polymkeric substance graphite wetting agent potpourri is diluted to solid and accounts for 5% of spray weight greatly in solvent.Wetting agent has promoted the even distribution of polymkeric substance graphite wetting agent potpourri.By spraying compound thin layer, promoted the well attached of interlayer.Adopt wetting agent, promoted the even distribution of graphite at the material that is used for providing better electric conductivity, and, adopt the wetting agent also to have promoted between each sprayed coating and the tack between polymkeric substance-graphite-wetting agent layer and the matrix.Therefore, the use of wetting agent makes developer roll more durable.Can increase the basic coating that constitutes by graphite entirely of one deck in the top of polymkeric substance graphite wetting agent potpourri.This surface coating provides extraordinary electric conductivity, and is very smooth and have a required toner release performance.This final coating is disperseed in being preferably the solvent of isopropyl alcohol and is applied by spraying.Have again, adopt wetting agent to guarantee well attached between surperficial graphite and the following polymkeric substance-graphite-wetting agent layer.Graphite wetting agent layer just is attached on the graphite in the polymkeric substance, has kept the surface of basic full graphite in the serviceable life of developer roll.Can apply the graphite and the wetting agent layer of multilayer.After basic graphite and the spraying of wetting agent layer,, guarantee that graphite and wetting agent are pressed in the hole of polymkeric substance with its adhesion of further promotion by the polishing of wool brush or similar material.Polishing can once be finished or carry out repeatedly along with applying of graphite wetting agent.Above-mentioned developer roll method for making of the present invention easily is automated, and adopts the material that is easy to obtain to make the durable developer roll with outstanding print characteristic.
Description of drawings
Fig. 1 formerly concerns synoptic diagram between developer roll, toner and other critical pieces in the technology toner casket.
Fig. 2 (a) is a magnetic developer roll side view.
Fig. 2 (b) is the cross sectional view of magnetic developer roll by diameter.
Fig. 3 is that developer roll of the present invention is showed developer roll matrix and other cross sectional view by relation between each layer of developer roll of the present invention's making.
Fig. 4 is the view of typical developer roll and scraping blade.
Fig. 5 is the schematic flow sheet of developer roll method for making of the present invention.
Embodiment
Developer roll of the present invention and preparation method thereof provides improved character of surface to finish effectively toner from the transfer of developer roll to photosensitive drums, its physics and chemical characteristic provide matrix and have been coated with better adhering to of interlayer, and guarantee that developer roll has better durability.
Fig. 1 is that formerly technology is used for the toner casket synoptic diagram of image processing system.Toner 1 is contained in the known container look bucket 2.Developer roll 3 rotation and with attract toner-particle.Scraping blade 4 removes unnecessary toner from developer roll 3 when developer roll 3 rotates.Photosensitive drums 5 is cylinders of charging, is coated with the material of selenium one class, or the organic compound of more normal use, changes electric charge in the exposure area.This photosensitive drums is charged by the device as elementary charging roller 14, can also can be the negative charge of homogeneous to the positive charge of photosensitive drums 5 input homogeneous both.Photosensitive drums 5 rotations are shone by laser 6 then through elementary charging roller 14.Its electric charge of area change on photosensitive drums 5 surfaces that those are shone by laser 6 is compared with the zone of illuminated mistake not and to be had more positive charge or relative more negative charge.Reflected light has replaced laser 6 in analog copying equipment.Along with photosensitive drums 5 continues rotation, the irradiated area on photosensitive drums 5 surfaces moves to adjacent with developer roll 3.The toner 1 on developer roll 3 surfaces attracted to the different charge area of photosensitive drums 5.Drum continues rotation.Toner on the drum is brought on approaching paper or other media 7.This medium 7 has been recharged to attract toner.Toner 1 is transferred on the medium 7 with the image format that is written on the photosensitive drums 5 by laser 6.By fuser roller 9 the toner hot melt is obtained permanent image on medium 7 after the medium.Developer roll 3 rotations and toner 1 adjacency.Developer roll will be with magnetic attraction toner 1 to its surface, if the words of magnetic developer roll; Perhaps, if nonmagnetic toner then arrives its surface with electrostatic attraction toner 1.Along with the developer roll rotation, near the scraping blade 4 toner 1 is brought to, the amount of the toner 1 on its metering developer roll 3 surface.Friction between scraping blade 4 and the developer roll 3 helps that friction charges into required electric charge to toner 1.Can move to charge areas different on the photosensitive drums 5 after the toner 1 of these chargings.
Friction between toner 1 and magnetic roller 3 and the scraping blade 4 causes the wearing and tearing on developer roll 3 surfaces.Fig. 4 has showed this interaction.The structure on developer roll 3 surfaces helps the electrification by friction process, and the toner that has improved developer roll 3 carries characteristic.If the surface of developer roll 3 is not durable, then friction will grind off the developing roller surface profile and reduce the amount of carrying of toner and to the triboelectric charging amount of toner.The outside surface 12 of developer roll 3 also must be smooth.To be adsorbed on the developer roll and can not transfer on the drum if not, toner-particle.The adhesion toner layer that can't shift can further reduce the quality of printing.
The invention provides a kind of this durable, smooth level requirement of satisfying, is full graphite skin 17 substantially, is combined with the durable composite bed of polymkeric substance graphite wetting agent with compound thin layer formation that the surface has wetting agent.Fig. 3 has showed the cross sectional view of developer roll of the present invention.The outside surface 12 of developer roll is the outside surface of basic full graphite linings 17.In its lower section, be polymkeric substance, graphite and wetting agent layer 16 on developer roll matrix 18.Developer roll matrix 18 is preferably aluminium matter, but also can be polymkeric substance or other metals with electric conductivity.The advantage of this structure and method for making will be described below.
The method of making developer roll is as shown in Figure 5, and is and as described below: at first, and preparation graphite mixture 19.Graphite granule must have relatively evenly and particle less, preferably in 0.3 to 10 micrometer range.Graphite is milled under ball milling that vibrates or grinding state with appropriate solvent.Although can use all kinds of solvents, best example is the potpourri of PMA (propylene glycol methyl ether acetate) and acetone.Choice of Solvent should make it have enough low boiling point so that dry rapidly and prevent drip, but also must be enough high, make the coating when spraying even.When graphite is ground to suitable dimensions, add wetting agent 20.Wetting agent is a kind ofly to be used for guaranteeing that the particle monomer thoroughly is blended in the product in the solvent.Wetting agent comprises various materials, has known dispersing characteristic in paint industry.Institute is lost to be that wetting agent can also help to adhere to.The inventor has found that wetting agent promotes polymkeric substance-graphite-wetting agent layer 16 in developer roll matrix 18 and application that polymkeric substance-graphite-the wetting agent layer adheres to each other.In the preferred embodiment, the Antiterra U wetting agent that has used BIC Chemie to produce.Other wetting agents also can use.Graphite is preferably in 50 to 1 with the ratio of wetting agent, but other ratios also will provide satisfied result.
In next step, in graphite and wetting agent potpourri 21, add suitable polymers is guaranteed all components under the milling of an appropriate value dispersion fully.Although can use a series of different polymkeric substance, in a preferred embodiment, used a kind of resilient elastomeric polymer, preferably two components fixed (two-partblocked) thermal response polyurethane.Elastomeric polymer provides extra toughness and elasticity to developer roll.In the preferred embodiment, polymkeric substance-graphite wetting agent portfolio ratio is that 60 parts of polymkeric substance are than 40 parts of graphite and wetting agent.This potpourri is further accounted for 5% by solvent dilution greatly to solid matter.Wetting agent is further guaranteed the fine dispersion of dissolved substances in polymkeric substance-graphite-wetting agent potpourri.
After preparation suitable polymers-graphite-wetting agent, next step preparation has the matrix 18 of conductive structure.Although can adopt molded conductive plastics, adopted an aluminium matter structure in the preferred embodiment.Conducting base 18 is cylinder or tubulose.If aluminium matter pipe, can be by extruding or hole moulding.Body with suitable diameter and length moulding after, carry out the institutional framework moulding.The institutional framework moulding can be undertaken by various method, comprises sandblast or vibro-grinding.In a preferred embodiment, blast media adopts glass medium to carry out.After the institutional framework moulding, the matrix of developer roll 18 is prepared to apply.The purpose of polymkeric substance-graphite-wetting agent layer 16 is to provide a wear-resisting matrix, and it helps to keep the graphite surface of enrichment.Compare the not developer roll matrix of this coating, it provides better quality.For example, if developer roll matrix 18 be aluminium matter and not do not apply, it changes its performance characteristic with oxidation.Also have, aluminium matter is softer relatively, will be soon by toner 1 and scraping blade 4 wearing and tearing.
Polymkeric substance-graphite wetting agent layer 16 is applied to material on the conducting base 18 by spraying 22.Polymkeric substance-graphite wetting agent layer preferably adopts air brush or similar Spray painting tool to be coated on the developer roll matrix 18 with a plurality of thin layers.By adopting the polymkeric substance-graphite wetting agent repeatedly spray high dilution on a small quantity, can guarantee to adhere to quality preferably between the homogeneity of coating material and the coating.Have, wetting agent plays crucial effects again.Wetting agent has improved the bonding that reaches between material layer between different kind of material.The inventor tested and uses a kind of material and do not make with lubricator in single spraying, and found that repeatedly spraying preferably uses when 20 times or more times wetting agent can greatly improve bonding between polymkeric substance-graphite wetting agent layer and the developer roll matrix 18.
Polymkeric substance-spraying with multistep of graphite wetting agent layer carried out.After each step, developer roll matrix and the polymkeric substance graphite wetting agent layer 16 that applies of part are all by oven drying or vapor away solvent 23.Developer roll matrix 18 be dried and apply after partial polymer-graphite-the wetting agent layer is cooled, can carry out another step polymkeric substance-graphite-wetting agent layer and spray 22.This step can repeat 24 and proceed to required number of times, is preferably about .03 to 1.25 micron thickness of interlayer 20-30 time.The thickness of polymkeric substance-graphite wetting agent layer 16 can change, but in the preferred embodiment greatly about 1 to 25 micron.After all materials that need were applied on the developer roll matrix 18, fixed polyurethane was by heating developer roll matrix 18 and polymkeric substance-graphite wetting agent layer 16 is hardened or crosslinked 25.This further improved between each sprayed coating and polymkeric substance graphite wetting agent layer 16 and developer roll matrix 18 between adhere to.
Graphite-wetting agent layer 17 prepared graphite and wetting agent layer in a similar manner before applying polymkeric substance.Graphite is reduced to trickle size by suitable milling, and preferably mills in conjunction with the vibration of solvent.Solvent is preferably isopropyl alcohol in this example.This layer can be selected the solvent of higher for use owing to will impose further distribution of grinding.Afterwards, wetting agent is added in the graphite solvent mixture.In addition, wetting agent can add in mill processes.In a preferred embodiment, the ratio of graphite and wetting agent is 50 to 1, although other ratios also can produce satisfied effect.The AntiTerra U of BICChemie is a preferred humectants, although also can select other for use.
Further diluted after the graphite wetting agent potpourri, accounted for 3% of solvent greatly until solid constituent.On polymkeric substance-graphite wetting agent layer 16, spray 26 by air brush or similar meticulous Spray painting tool after graphite-wetting agent layer 17.Between the graphite granule and polymkeric substance-graphite wetting agent layer that wetting agent has guaranteed to expose in graphite wetting agent layer, and well attached between graphite and the graphite wetting agent layer.Spraying of graphite wetting agent layer 17 26 can repeat multistep 28, is preferably 3 or more, can have more than 20 steps.Spray after each layer graphite wetting agent layer, make every layer to volatilize 27, remove solvent.Basic full graphite linings 17 is polished 29, makes graphite be evenly distributed on developing roller surface, and graphite wetting agent material is entered in the hole and crack of polymkeric substance graphite wetting agent layer.Polishing 29 has guaranteed that the graphite wetting agent is on the top layer and the bond strength of graphite below polymkeric substance.This combination is on the skin 12 of developer roll 3 basic full graphite linings 17.Polishing 29 can go on foot the back at each and repeat 28, or applies back repetition 28 at every which floor graphite wetting agent.
By basic full graphite top layer is set, this developer roll has the outstanding electric and smooth property that can discharge toner fully.Because wetting agent has been guaranteed the adhesive strength of graphite at polymkeric substance graphite wetting agent laminar surface, basic full graphite linings can be maintained in whole serviceable life at developer roll.By adopting the rubber-like elastomeric polymer, as polyurethane, the wearing and tearing of polymkeric substance graphite wetting agent layer are lowered or eliminate.
Developer roll of the present invention also shows other advantage. By cleaning developer roll and again applying basic full graphite Layer and wetting agent, developer roll can reuse after the initial period. The developer roll that therefore, can recycle pair The essential step that developer roll is made in environment and minimizing, so end user's use cost is all significant. This developer roll is particularly suitable for individual or company that the toner casket is regenerated and made. Regeneration the toner casket refer to through Again add again toner after once using and change the part that weares and teares. Developer roll of the present invention is so that by the renovation table The graphite linings of face and fast quick-recovery uses. Although the inventor has adopted specific material, in essential scope of the present invention In, utilizing other material and improving is apparent for those skilled in the art.
Claims (30)
1. a making is used for the method for the developer roll of image processing system, and described method comprises step:
The preparation conducting base,
With graphite, the wetting agent of polymkeric substance and fine gtinding and the solvent that can spray, form the potpourri of polymkeric substance, graphite, wetting agent and solvent, and
The potpourri of described polymkeric substance, graphite, wetting agent and solvent is sprayed application on the conducting base, to form polymkeric substance-graphite-wetting agent layer thereon.
2. method as claimed in claim 1 further is included in the polymkeric substance-graphite-wetting agent layer that sprays on the described conducting base more than one deck.
3. method as claimed in claim 2 is characterized in that, sprays the polymkeric substance-graphite-wetting agent layer more than 20 layers on described conducting base.
4. method as claimed in claim 3 further is included in and sprays the step that each polymkeric substance-graphite-wetting agent layer is dried developer roll afterwards.
5. method as claimed in claim 4 further is included in baking step and sprays cooling developer roll step between next polymkeric substance-graphite-wetting agent layer.
6. method as claimed in claim 1 is characterized in that, described polymkeric substance one graphite one wetting agent layer is that 60 parts of polymkeric substance are than 40 parts of graphite and wetting agent by weight.
7. method as claimed in claim 1 further is included in the step that adds before the polymkeric substance admixed graphite and wetting agent in solvent.
8. method as claimed in claim 6 is characterized in that, graphite and wetting agent are milled by vibration and mixed before adding polymkeric substance.
9. method as claimed in claim 1 further comprises polymkeric substance-graphite-wetting agent and solvent mixture is diluted in other solvent, until polymkeric substance-graphite-wetting agent less than 5% of mixture weight.
10. method as claimed in claim 1 is characterized in that, solvent is the potpourri of PMA and acetone.
11. method as claimed in claim 5 is characterized in that, polymkeric substance is the fixed thermal response polyurethane of two components.
12., comprise that is further heated the final step that the roller that applies makes urethane cures as the method for claim 11.
13. method as claimed in claim 1 is characterized in that, the range of size of graphite granule is from 0.3 micron to 10 microns.
14. method as claimed in claim 1 is characterized in that, conducting base is an aluminum pipe.
15. a making is used for the method for the developer roll of image processing system, described method comprises step:
The preparation conducting base,
With the graphite and the wetting agent of solvent polymkeric substance that can spray and fine gtinding, form the potpourri of polymkeric substance, graphite, wetting agent and solvent,
Spray the potpourri of described polymkeric substance, graphite, wetting agent and the solvent of a layer thickness between 1.25 microns to 0.03 micron to conducting base,
Admixed graphite and wetting agent to be forming the graphite enrichment potpourri of graphite and wetting agent in second kind of solvent, and
On polymkeric substance-graphite-wetting agent layer, spray the graphite enrichment potpourri of one deck graphite and wetting agent.
16., further comprise the polymkeric substance-graphite-wetting agent layer that applies more than one deck as the method for claim 15.
17., further comprise the step that applies 20 to 30 strata compound-graphite-wetting agent layer as the method for claim 15.
18., further be included in the step that each strata compound-graphite-wetting agent of spraying is dried developer roll afterwards as the method for claim 15.
19. as the method for claim 15, further be included in after each step dry development roller, and carrying out before next step applies polymkeric substance-graphite-wetting agent layer the step of cooling developer roll.
20. the method as claim 15 is characterized in that, described polymkeric substance one graphite one wetting agent layer is that 60 parts of polymkeric substance are than 40 parts of graphite and wetting agent by weight.
21., further be included in before the adding polymkeric substance step of admixed graphite and wetting agent in solvent as the method for claim 15.
22. as the method for claim 15, further comprise polymkeric substance-graphite-wetting agent and solvent mixture diluted in other solvent, until the weight of polymkeric substance-graphite-wetting agent in potpourri less than 5% step.
23. the method as claim 15 is characterized in that, the described solvent that sprays is the potpourri of PMA and acetone.
24. the method as claim 15 is characterized in that, polymkeric substance is the fixed thermal response polyurethane of two components.
25., comprise that is further heated the final step that the roller that applies makes urethane cures as the method for claim 24.
26. the method as claim 24 is characterized in that, the graphite enriched layer applies by repeatedly applying.
27., further comprise the step of dry second kind of solvent from the graphite enriched layer as the method for claim 24.
28., further comprise the step of polishing graphite enriched layer as the method for claim 24.
29. the method as claim 24 is characterized in that, second kind of solvent is isopropyl alcohol.
30. the method as claim 15 is characterized in that, conducting base is an aluminum pipe.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US2001/047918 WO2003043760A1 (en) | 2000-08-02 | 2001-11-02 | Method of manufacturing a developer roller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1529640A CN1529640A (en) | 2004-09-15 |
| CN1277159C true CN1277159C (en) | 2006-09-27 |
Family
ID=32592269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN01823473.9A Expired - Lifetime CN1277159C (en) | 2001-11-02 | 2001-11-02 | Method for manufacturing developer roller |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1439923A4 (en) |
| CN (1) | CN1277159C (en) |
| AU (1) | AU2002228998A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102925887A (en) * | 2012-11-12 | 2013-02-13 | 湖北远东卓越科技股份有限公司 | Laser class selenium drum developer roller surface treatment process |
| CN103365171A (en) * | 2013-07-16 | 2013-10-23 | 珠海市科力莱科技有限公司 | Regeneration method of magnetic roller |
| JP6109117B2 (en) * | 2014-06-13 | 2017-04-05 | 住友ゴム工業株式会社 | Semiconductive roller and method for manufacturing the same |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3770482A (en) * | 1971-01-18 | 1973-11-06 | Beatrice Foods Co | Electrostatic coating method of applying multilayer coating |
| US4989044A (en) * | 1988-04-27 | 1991-01-29 | Canon Kabushiki Kaisha | Developing apparatus for developing electrostatic latent images |
| JPH03132680A (en) * | 1989-10-18 | 1991-06-06 | Toshiba Corp | Developing roller and transporting roller |
| US5942287A (en) * | 1998-04-21 | 1999-08-24 | Lexmark International, Inc. | Extended wear developer sleeve with coupling agent |
-
2001
- 2001-11-02 CN CN01823473.9A patent/CN1277159C/en not_active Expired - Lifetime
- 2001-11-02 EP EP01990128A patent/EP1439923A4/en not_active Withdrawn
- 2001-11-02 AU AU2002228998A patent/AU2002228998A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| EP1439923A1 (en) | 2004-07-28 |
| EP1439923A4 (en) | 2008-09-10 |
| AU2002228998A1 (en) | 2003-06-10 |
| CN1529640A (en) | 2004-09-15 |
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Granted publication date: 20060927 |