CN101004578A - An image forming apparatus capable of preventing generation of residual image and transfer failure - Google Patents
An image forming apparatus capable of preventing generation of residual image and transfer failure Download PDFInfo
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- CN101004578A CN101004578A CN 200610064191 CN200610064191A CN101004578A CN 101004578 A CN101004578 A CN 101004578A CN 200610064191 CN200610064191 CN 200610064191 CN 200610064191 A CN200610064191 A CN 200610064191A CN 101004578 A CN101004578 A CN 101004578A
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Abstract
An image forming apparatus includes an image bearing member, supporting rollers, a belt-like-shaped medium, a primary transfer member, a secondary transfer member, and a grounded conductive roller. The image bearing member forms a toner image at a predetermined process speed. The belt-like shaped medium has a charge voltage. The primary transfer member sequentially transfers the toner image onto the belt-like-shaped medium and the secondary transfer member transfers the toner image onto a recording sheet. The conductive roller is arranged in contact with the belt-like shaped medium by a predetermined wrapping length. A relationship Tb<X/Vb is satisfied, where Tb is a decay time period in units of second in which the charge voltage of the belt-like shaped medium decays from approximately 200 volts to 200/e volts, where e is a base of natural logarithm, X is the predetermined wrapping length of the belt-like shaped medium against the conductive roller, and Vb is the predetermined process speed.
Description
Technical field
Exemplary aspect of the present invention relates to imaging device, relates in particular to can prevent after image and the imaging device of fault in the image transfer printing.
Patent specification is incorporated herein by reference at this full content with them based on Japanese patent application JP2005-354253 that submits on Dec 8th, 2005 to Jap.P. office and the Japanese patent application JP2006-292592 that submits on October 27th, 2006.
Background technology
In recent years, concerning imaging device, more and more wish to dwindle its size, alleviate its weight and improve its processing speed.Even improved processing speed, the situation that the banding pattern medium is not equipped with special-purpose arresting element still gets more and more.The decay of the residual charge of banding pattern medium takes place when contacting in this banding pattern medium and ground connection conductive gap roller (spanned roller) during rotary manipulation therein.Be provided with the diameter of ground connection conductive rollers bigger, make duration of contact elongated, and improve discharge effect thus.In addition, in order to adapt to the attenuation properties of banding pattern medium, discuss to for example comprising the image-forming condition that the transfer voltage condition is proofreaied and correct.
Publication number is to propose the damping time constant of intermediate transfer belt electromotive force is arranged between 0.01 second to 1000 seconds in the careful open application of the Japanese Patent Laid of 2003-177610.
Careful disclosing applies for that mentioning this time constant was less than or equal to 600 seconds although publication number is the Japanese Patent Laid of 2003-177610, preferably be less than or equal to 100 seconds, but for the banding pattern medium, the rate of decay may be still slower when this time constant is less than or equal to 600 seconds.Thereby, because for example problem of after image may take place in residual electromotive force.In addition, when charge-carrying belt touched current-carrying part, the decay of electric charge took place in it.Therefore, when short-time contact such as charge-carrying belt and metallic roll, decay may be insufficient.In other words, when the time constant of banding pattern medium is 600 seconds, or even when being 100 seconds, also may not can obtain sufficient discharge time.Thereby, bring for this, need the mechanism of discharging in fact.Under the situation that discharge mechanism is not provided, for adapting to the electric charge of the band that changes according to service condition, it may be essential that the transfer printing electric current is proofreaied and correct.
In addition, in order to adapt to the requirement of minification, weight reduction and raising processing speed, the diameter that conduction be striden roller is provided with greatlyyer.Yet, stride the diameter of roller when big when conduction, the girth of weight and band will correspondingly increase.As a result, this unit size will become greatly, and cost may correspondingly increase.
Carry out continuously and when simultaneously residual electromotive force is accumulated on the banding pattern medium when the formation of image, for example problem of after image and image failure may take place.Because the residual electromotive force of banding pattern medium is not constant, so the correction of for example transfer printing condition of image-forming condition is difficult to carry out, this causes taking place easily transfer failure.
Normally, by applying first transfer printing (primary transfer) voltage in resilient roller of the downstream end of roll gap etc.The surface resistance at the back side influences the quality of transferred image.When its surface resistance was relatively low, electric charge moved in in-plane, and the CHARGE DISTRIBUTION at transfer nip place is widened.Thereby the beginning charged gesture increase partly in first transfer printing has increased the electric field at inactive area place thus and has caused being easy to generate the image fragment.
On the other hand, when the surface resistance at the back side was higher relatively, the migration of electric charge in in-plane reduced, and CHARGE DISTRIBUTION narrows down.Thereby the electric field at the inactive area place of the start-up portion of first transfer printing reduces, and can prevent the image fragment thus.In other words, when the surface resistance of belt-like shaped medium 1 * 10
10Ω and 5 * 10
12In the time of in the Ω scope, the charge migration in in-plane may reduce, and may increase the effect that prevents the image fragment.Yet, because flow of charge, reduce in the decay of the near zone of contact area.As a result, the efficient of the discharge (belt discharge) of the band that is taken place by conductive rollers has reduced.In addition, when the surface resistance at the back side is higher, will become a problem discharge time that conductive rollers contacts with the banding pattern medium.
Surface resistance when the back side of banding pattern medium is less than or equal to 1 * 10
10Ω especially is less than or equal to 1 * 10
9During Ω, more electric charge flows in in-plane, makes effective discharge can take place.Thereby, can discharge effectively above the roller of the minor diameter that duration of contact is short making.On the other hand, the surface resistance when the back side is greater than or equal to 5 * 10
12During Ω, discharge after first transfer printing, may occur, cause occurring easily image failure thus.
After just having carried out first transfer printing, the back side of band is different with the quantity of electric charge of front.From the electric charge of roll gap leave the roll gap end be applied to leave the position the place to discharge.Yet the amount of electric charge supply can change according to surface resistance.When surface resistance is greater than or equal to 5 * 10
12During Ω, the quantity of electric charge of supplying from this roll gap is little, to such an extent as to be difficult to discharge.Keep inhomogeneous in the front of band and the quantity of electric charge at the back side.As electric field, this situation is unsettled, thus near the discharge of equipment causing.
Summary of the invention
In an example, imaging device comprises one or more image-bearing member, a plurality of backing rolls, belt-like shaped medium, one or more first transferring member, second transferring member and at least one ground connection conductive rollers.Dispose one or more image-bearing member to form one or more toner image with predetermined processing speed thereon.This belt-like shaped medium is configured to charge with charging voltage, and it is rotatable, extend between a plurality of backing rolls, and maintenance contacts with described one or more image-bearing member.Described one or more first transferring member is corresponding one by one with described one or more image-bearing member, and is configured to and will be formed at described one or more toner image on described one or more image-bearing member on this belt-like shaped medium that is transferred to successively on the position.This toner image that this second transferring member is configured to be loaded on this belt-like shaped medium is transferred on the recording chart.This at least one conductive rollers is connected with ground, and sense of rotation along this belt-like shaped medium, be set at the upstream of this first transferring member and in the downstream of this second transferring member, contact with this belt-like shaped medium according to predetermined coiling length (wrapping length).In this imaging device, satisfy and concern Tb＜X/Vb, wherein Tb is to be that the charging voltage of this belt-like shaped medium of unit is from about 200 volts cycles die-away time that reduce to 200/e volt with the second, wherein e is the end of natural logarithm, X is the coiling length that should be scheduled to of this belt-like shaped medium against this at least one conductive rollers, with the millimeter is unit, and Vb is to be the processing speed that should be scheduled to of unit representation with millimeter/per second.
Description of drawings
By considering in conjunction with the accompanying drawings, with reference to the exemplary embodiment of describing in detail below, because more complete understanding and subsidiary many advantages of disclosure are become better understood, these understandings and advantage will obtain easily, in the accompanying drawing:
Fig. 1 is the synoptic diagram that is used to explain the example of the color image forming apparatus that can use exemplary embodiment of the present invention;
Fig. 2 is the view that is used to explain the measurement of charged gesture decay;
Fig. 3 A to 3D is the curve map that is used to explain the attenuation properties of charged gesture;
Fig. 4 is the synoptic diagram that is used to explain first transfer section;
Fig. 5 is the curve map of attenuation properties that is used to explain the opposed plate of the opposite electrode of ground connection and insulation;
Fig. 6 A and 6B are the tables that is used to represent exemplary embodiment and comparative example;
Fig. 7 is the curve map that is used to explain according to the transfer failure generation of Fig. 6;
Fig. 8 is used to explain the curve map that takes place according to Fig. 6 after image;
Fig. 9 is used to explain the curve map that concerns between belt surface resistance and the fragment;
Figure 10 is the curve map that is used to explain relation between belt surface resistance and the discharge.
Embodiment
Terminology used here only is in order to describe specific embodiment, and is not intended to limit the present invention.As used herein, " (a) " of singulative, " one (an) ", " being somebody's turn to do (the) " also can comprise plural form, unless context spells out in addition.It is also understood that, term " comprises " and/or " including ", when it uses in this manual, expression exists described parts, whole, step, operation, element and/or assembly, does not exist or additional one or more other parts, whole, step, operation, element, assembly and/or their combination is arranged and do not get rid of.
When the exemplary embodiment of describing shown in the figure, for clarity sake, adopt specific term.Yet the disclosure of patent specification is not intended to be subject to the particular term of selection like this, and should be appreciated that, each specific element comprises the technology substitute that all are operated in a similar way.For making drawing and description for simplicity, give identical Reference numeral to material or member, and save description, unless point out in addition to it with identical function.Explain exemplary embodiment of the present invention with reference to the accompanying drawings.Referring now to accompanying drawing, wherein in whole figure, what identical Reference numeral was represented is identical or corresponding parts, explains imaging device (for example color image forming apparatus) according to an exemplary embodiment of the present invention referring to Fig. 1 especially.
To provide the description of color image forming apparatus according to an exemplary embodiment of the present invention below.Color image forming apparatus comprises the transfer belt unit 10 that wherein has intermediate transfer belt 11 and four image boxes (station) that become linear layout. Photosensitive drums 20Y, 20C, 20M and 20BK are equipped with separately to corresponding image boxes.With charging device 30Y, 30C, 30M and 30BK, each among developing apparatus 50Y, 50C, 50M and 50BK and cleaning device 40Y, 40C, 40M and the 40BK disposes round corresponding photosensitive drums.From Fig. 1 left side, fill the toner of yellow (Y), cyan (C), pinkish red (M) and black (BK) different colours among toner Cartridge 9Y, 9C, 9M and the 9BK respectively.The toner of scheduled volume offers developing apparatus 50Y, 50C, 50M and 50BK by toner organization of supply (not shown).
According to print signal, photosensitive drums 20Y, 20C, 20M and 20BK are charged equably by each charging device 30Y, 30C, 30M and 30BK.On photosensitive drums 20Y, 20C, 20M and 20BK, form the electrostatic latent image corresponding by writing station 8 with picture signal.By each developing apparatus 50Y, 50C, 50M and 50BK with each latent electrostatic image developing, thereby form toner image.
Transfer voltage is applied on the first transfer roll 12Y, 12C, 12M and the 12BK, is transferred to successively on the intermediate transfer belt 11 that is used to form the stack toner image with the toner image that will be formed on photosensitive drums 20Y, 20C, 20M and the 20BK.Subsequently, the toner image that is formed at the stack on the intermediate transfer belt 11 is transferred to roller 16 position intermediate that are positioned at second transfer roll 5 and are located at second transfer roll, 5 right opposites.Transfer electric field is applied to position between second transfer roll 5 and the roller 16, is transferred on the transfer paper 2, on this paper, form the toner image of stack thus with toner image that will stack.
The transfer paper 2 that is formed with the toner image of stack on it is transferred to fixing device 6, so toner image thereon.Transfer paper 2 is discharged on the catch tray by paper distributing roller 7.
The residual toner of staying on each image-carrier is removed to 40BK by each cleaning device 40Y.Charging device 30Y, 30C, 30M and 30BK, wherein direct current is superimposed upon on the alternating current, and parallel image-carrier is carried out the charging of charging neutrality, to prepare imaging processing subsequently.
The residual toner of staying on the intermediate transfer belt 11 is removed by belt cleaning device 13.Charged intermediate transfer belt 11 discharges naturally and contacts with ground connection and with each opposed roll 15 that intermediate transfer belt cleaning device 13 is oppositely arranged, to implement decay, prepares imaging processing subsequently.
Implementing second transfer printing makes transfer voltage be applied on second transfer roll 5 or the roller 16.When being applied to this voltage on the roller 16, intermediate transfer belt 11 separates with roller 16.Subsequently, decay beginning.When intermediate transfer belt 11 was in the state of opposed roll 15 of coiling ground connection, electromotive force was decayed effectively.
Carry out the measurement of belt electromotive force decay, as shown in Figure 2, will as measuring object with 61 being placed on the opposite electrode 60 that forms by sheet metal, which is provided with the conductive rubber that thickness is 1mm.With diameter phi is that metal electrode 62 that 10mm is stained with conductive rubber on it is placed on and is with on 61, and applies the load of 2kg thereon.Use for example high-voltage power supply 63 of Trek Model 610C, constant voltage (200V) is applied to opposite electrode 60 and 10 seconds of metal electrode 62 position intermediate.Subsequently, when being applied in, voltage measures attenuation characteristic by cutting off switch 64.
The metal electrode 62 that will have conductive rubber is connected to sheet metal 65, is used for potential measurement.The voltage induced corresponding with this charged gesture is on sheet metal 65.Then by for example electromotive force of the surface potential instrumentation amount sheet metal 65 of Trek Model 344, so that measure attenuation properties.Distance between metal electrode 65 and the surface electrostatic meter probe 67 is set to 1mm.Surface potential is passed on the register 68 of GraphtecWR3101 Linearcorder for example, so that based on the die-away curve measuring speed.
Attenuation properties is measured and can be finished by being input in the PC.In one exemplary embodiment, test by being input in the PC, and measure.
In this test, use the resistance measurement that MITSUBISHI CHEMICAL CORPORATION is that make, that have the probe conductive rubber, weight is finished band as the Hiresta-UP MCP-HT450URS of 2kg.The condition of measuring comprises and applies 10 seconds of 500V.Fig. 3 A illustrates charged gesture attenuation properties according to this experiment with measuring to 3D.
Surface potential is passed in the computing machine, so that run a curve figure.Die-away curve based on this curve map obtains time constant.For convenience's sake, setting 0.0001 second locates as initial charged gesture.
Fig. 3 A and 3B illustrate the decay of the charged gesture of individual layer PVDF of identical data.Therefore wherein the longitudinal axis of Fig. 3 A or Y-axis are from 0V to 1000V, and the longitudinal axis of Fig. 3 B or Y-axis are from 0V to 400V, discrimination time constant easily.Time constant is initial strip electromotive force V
0Decay to by V
0Die-away time during value that/e obtains, wherein e is the end 2.71828 of natural logarithm.When obtaining the voltage relevant with time constant based on the die-away curve shown in Fig. 3 B, the time constant when 100V is 1.8 seconds, is 1.1 seconds when 200V, is 0.25 second when 1000V.Changed to 0.25 second in the time constant of charged gesture when 100V is between 1000V from 1.8 seconds.Be applied in the difference with time constant under the situation on the charged gesture of 1000V, the charged gesture in time constant place at 0.25 second is 370V, and is 70V 1.8 seconds the charged gesture in time constant place.Observe the huge difference on residual electromotive force.Fig. 3 C and 3D illustrate the decay of electromotive force of the individual layer polyimide of identical data.Wherein the Y-axis of Fig. 3 C or the longitudinal axis are from 0V to 300V, and the longitudinal axis or the Y-axis of Fig. 3 D are from 0V to 150V.
Because surface resistance, the amount of debris of first transfer printing can be different.Reason is set as follows.Fig. 4 is the synoptic diagram that is used to explain first transfer section.The toner image that is formed on the photosensitive drums 20 is transferred on the intermediate transfer belt 11 in roll gap (nip) between the photosensitive drums 20 and first transfer roll 12, that mark with imaginary circle ring zone.Yet if it is higher relatively to be positioned at the electric field of the inactive area before the roll-gap region, the toner on the photosensitive drums 20 moves in inactive area so, causes toner to be transferred to and is with.This is so-called invalid transfer printing.The migration and the toner of transfer printing spread and become the transfer printing fragment on tape.
Fig. 5 illustrates the attenuation properties of the opposite electrode and the opposed plate of insulation of ground connection.Should be appreciated that will grow with respect to the decay of the opposite electrode of ground connection the die-away time of the opposed plate that insulate.Insulate opposed plate decay mainly by naturally the discharge and cause.Thereby when this band had different time constants, die-away time similarly can be long.This may be because when charged band when conduction is striden the roller position intermediate, produce to decay hardly.On the contrary, when charged band with when conductive rollers partly contacts during by the conductive rollers part, decay may take place.
Provide the description of comparative example and embodiment with reference to Fig. 6 A and 6B.Comparative example 1 is the situation of the time constant of band greater than the coiling time of band.In device shown in Figure 1, the roller diameter of opposed roll 15 is 26mm, and the tape wrapping angle is 175 degree, and image taking speed is 155mm/ second, and Dai the coiling time is 0.26 second simultaneously, and the time constant of being with is 1.1 seconds.Under the situation of its time constant, produce residual electromotive force thus greater than the coiling time of band.When 100 parts of continuous printings, transfer printing can reduce, and this causes the scrambling in the solid image-region.Particularly, this scrambling may be quite obvious in using red, green and blue dichromatism (two-color) superimposed images.The possibility of result forms irregular image.Surface resistance is positioned at 1 * 10
10Ω to 5 * 10
12In the Ω scope, make the generation of fragment seldom may not can produce after image and electric discharge phenomena.
In comparative example 2 and 3, when comparing,, may produce fragment because surface resistance is lower with comparative example 1.Surface resistance is low more, may produce many more fragments.
In comparative example 4, when surface resistance is higher, improve the generation of fragment.Yet, when surface resistance height to 7 * 10
12During Ω,, may make image produce scrambling owing to produce electric discharge phenomena.
As the image taking speed of the device of the comparative example 5 of speeder relatively example 4 are 255mm/ seconds.Because the tape wrapping time less than time constant, can produce transfer failure and after image.
In a second embodiment, roller diameter is 38mm, and the time is increased to 0.23 second from 0.16 reeling.Therefore, because of causing short problem of tape wrapping time to improve at a high speed.In this embodiment and comparative example, use the tandem type imaging device of the discharge mechanism that does not have intermediate transfer belt to assess.
Fig. 7 to 10 is the curve maps that are used to show the result of these embodiment and comparative example.Fig. 7 illustrates the generation according to the transfer failure of Fig. 6.Fig. 8 illustrates the generation according to the after image of Fig. 6.According to Fig. 7 and Fig. 8, as X/Vb during greater than time constant Tb (X/Vb＞time constant Tb), wherein X is the coiling amount, and Vb is a speed, obtains optimum.Promptly, as the time X/Vb that reels during greater than the time constant Tb among Fig. 7, transfer failure can not appear yet.As the time X/Vb that reels during greater than the time constant Tb among Fig. 8, after image can not take place.Among Fig. 7 zero expression does not have transfer failure, and the ■ among Fig. 7 represents that transfer failure takes place.Among Fig. 8 zero expression does not have after image, and the ■ among Fig. 8 represents that after image takes place.
Fig. 9 illustrates according to comparative example 2 and 3 and be shown in the belt surface resistance of another embodiment among Fig. 6 and the relation between the fragment.Figure 10 illustrates according to the relation between the belt surface resistance of Fig. 6 and the discharge.According to Fig. 9 and Figure 10, when belt surface resistance is suppressed at 1 * 10
10Ω to 5 * 10
12In the time of in the Ω scope, can suppress discharge.
In other words, when the time constant of middle transfer belt is less than or equal to intermediate transfer belt around the coiling of conductive rollers during the time, can remove substantially this with on electric charge, therefore can avoid owing to there being residual electromotive force to produce the problem relevant with image.When surface resistance is in 1 * 10
10Ω to 5 * 10
12In the time of in the Ω scope, transfer printing fragment and electric discharge phenomena can be inhibited, and can avoid thus owing to there being residual electromotive force to produce the problem relevant with image.
In addition, when the time constant of middle transfer printing less than around the coiling of the intermediate transfer belt of conductive rollers during the time, can with this with on electric charge remove basically and do not need to discharge mechanism, can avoid thus because of residual electromotive force that cause with image-related problem.Thereby, based on time constant and coiling time, suitable roller diameter can be set.In addition, can realize required reducing of size of tandem type device and alleviating of weight.
For a roller with the cleaning part positioned opposite, hope is one to have and good prevents the spatter property that the intermediate transfer element can not be damaged and the metallic roll of surface nature to making, and contacts with chemglaze blade etc. on this roller.According to this embodiment, under situation about metallic roll being used for the opposed roll of cleaning part positioned opposite, because for example image blurring (blooming) of conducting rubber roller and the problem that resistance fluctuation causes can be avoided.Thus, can discharge fully to middle transfer article.
Embodiments of the invention can use the conventional universal digital computer of programming according to the instruction of this instructions to implement easily.The programmer can easily prepare suitable software code based on instruction of the present invention.The manufacturing that embodiments of the invention also can be used by specific integrated circuit or by implementing the suitable network of conventional computer circuits is interconnected, this is conspicuous concerning those skilled in the art.
Any can enforcement with the form of system or equipment in the preceding method includes but not limited to be used for finishing structure any of the method shown in the figure.
In addition, any can the enforcement in the preceding method with the form of a program.This program can be stored in the computer-readable medium, and when when operation in computer equipment (equipment that comprises processor), is suitable for implementing any in the preceding method.Thereby storage medium or computer-readable medium are suitable for canned data and are suitable for interacting with data processing equipment or computer equipment, to implement any one method in the foregoing description.
Storage medium can be mounted in the built-in medium in the computer equipment main body or be made as the move media that it can be separated from the computer equipment main body.The example of built-in medium includes but not limited to rewritable nonvolatile memory for example ROM and flash memory, and hard disk.The example of move media includes but not limited to optical storage medium for example CD-ROM and DVD; Magnetic-optical storage media is magneto-optic disk MO for example; Magnetic-based storage media is floppy disk (trade mark trademark), tape and portable hard drive for example; Medium with built-in rewritable nonvolatile memory is storage card for example; With the ROM box for example of the medium with built-in ROM.
Described embodiment like this, after having read patent specification, obviously, it can change in many ways.This change should not thought and departs from the spirit and scope of the invention, and these all modifications are conspicuous to those skilled in the art's formula, all are included in the scope of appending claims.
Claims (4)
1. imaging device comprises:
One or more image-bearing member is configured to form one or more toner image with predetermined processing speed thereon;
A plurality of backing rolls;
Be configured to the belt-like shaped medium of charging with charging voltage, it is rotatable, extend between described a plurality of backing rolls, and maintenance contacts with described one or more load-carrying unit;
One or more first transferring member corresponding one by one with described one or more image-bearing member, and described one or more toner image that is configured to be formed on described one or more image-bearing member is transferred on the position of this belt-like shaped medium successively;
Second transferring member, the toner image that is configured to be loaded on this belt-like shaped medium is transferred on the recording chart;
At least one ground connection and upstream be provided with and, contact with this belt-like shaped medium at this first transferring member along the sense of rotation of this belt-like shaped medium according to predetermined coiling length in the conductive rollers that this second transferring member is provided with downstream,
Wherein satisfy and concern Tb＜X/Vb, wherein Tb is to be that the charging voltage of this belt-like shaped medium of unit is from about 200 volts cycles die-away time that reduce to 200/e volt with the second, wherein e is the end of natural logarithm, X is the described predetermined coiling length against this belt-like shaped medium of described at least one conductive rollers, with the millimeter is unit, and Vb is to be the processing speed that should be scheduled to of unit representation with the per second millimeter.
2. imaging device as claimed in claim 1, wherein this belt-like shaped medium has from about 1 * 10
10Ω is to about 5 * 10
12Surface resistance in the Ω scope.
3. imaging device as claimed in claim 1 wherein is configured to described at least one conductive rollers as the discharge roller with respect to this belt-like shaped medium.
4. imaging device as claimed in claim 1 wherein is configured to described at least one conductive rollers be used as clearer and discharge roller with respect to the band of this belt-like shaped medium.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP354253/05 | 2005-12-08 | ||
| JP2005354253 | 2005-12-08 | ||
| JP292592/06 | 2006-10-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101004578A true CN101004578A (en) | 2007-07-25 |
| CN100589043C CN100589043C (en) | 2010-02-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610064191A Active CN100589043C (en) | 2005-12-08 | 2006-12-08 | An image forming apparatus capable of preventing generation of residual image and transfer failure |
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| CN (1) | CN100589043C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101634828B (en) * | 2008-07-24 | 2012-01-11 | 株式会社理光 | Belt member, transfer unit and image forming apparatus |
| CN101452238B (en) * | 2007-12-06 | 2012-04-25 | 株式会社理光 | Belt member, transfer unit incorporating same, image forming apparatus incorporating same, and method of evaluating same |
| CN110941163A (en) * | 2018-09-21 | 2020-03-31 | 佳能株式会社 | Developing member, electrophotographic process cartridge, and electrophotographic image forming apparatus |
-
2006
- 2006-12-08 CN CN200610064191A patent/CN100589043C/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101452238B (en) * | 2007-12-06 | 2012-04-25 | 株式会社理光 | Belt member, transfer unit incorporating same, image forming apparatus incorporating same, and method of evaluating same |
| CN101634828B (en) * | 2008-07-24 | 2012-01-11 | 株式会社理光 | Belt member, transfer unit and image forming apparatus |
| CN110941163A (en) * | 2018-09-21 | 2020-03-31 | 佳能株式会社 | Developing member, electrophotographic process cartridge, and electrophotographic image forming apparatus |
| CN110941163B (en) * | 2018-09-21 | 2023-04-25 | 佳能株式会社 | Developing member, electrophotographic process cartridge, and electrophotographic image forming apparatus |
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| Publication number | Publication date |
|---|---|
| CN100589043C (en) | 2010-02-10 |
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