CN101379442A - Image forming device, image forming method, and image forming system - Google Patents

Image forming device, image forming method, and image forming system Download PDF

Info

Publication number
CN101379442A
CN101379442A CNA2007800040488A CN200780004048A CN101379442A CN 101379442 A CN101379442 A CN 101379442A CN A2007800040488 A CNA2007800040488 A CN A2007800040488A CN 200780004048 A CN200780004048 A CN 200780004048A CN 101379442 A CN101379442 A CN 101379442A
Authority
CN
China
Prior art keywords
developer
image
voltage
carrier
alternating voltage
Prior art date
Application number
CNA2007800040488A
Other languages
Chinese (zh)
Other versions
CN101379442B (en
Inventor
小池直树
加藤洋
鸭志田伸一
Original Assignee
精工爱普生株式会社
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
Priority to JP2006056830A priority Critical patent/JP2007233195A/en
Priority to JP056830/2006 priority
Priority to JP2006297693A priority patent/JP4595923B2/en
Priority to JP297693/2006 priority
Application filed by 精工爱普生株式会社 filed Critical 精工爱普生株式会社
Priority to PCT/JP2007/053653 priority patent/WO2007099961A1/en
Publication of CN101379442A publication Critical patent/CN101379442A/en
Application granted granted Critical
Publication of CN101379442B publication Critical patent/CN101379442B/en

Links

Abstract

Fogging generation is properly prevented. An image forming device comprising the followings: an image carrier for carrying a latent image, a developer carrier having on its surface recesses arranged regularly and transporting a developer to an opposing position opposite to the image carrier by turning with the developer kept carried, and an ac voltage applying unit for applying to the developer carrier an ac voltage provided with a first voltage for sending the developer from the developer carrier to the image carrier, for the purpose of allowing the developer transported to the opposing position to develop the latent image, and with a second voltage for sending the developer from the image carrier to the developer carrier, wherein the frequency of the ac voltage is up to a value obtained by dividing the minimum width, along the peripheral direction of the developer carrier, of the recess by the moving speed of the surface of the developer carrier when the developer carrier turns.

Description

Image processing system, image forming method and image formation system

Technical field

The present invention relates to image processing system, image forming method and image formation system.

Background technology

Image processing systems such as laser printer are known.For example, this image processing system has: image carrier is used to carry sub-image; And developer carrier, transfer by state backspin this developer is transported on the relative position relative with described image carrier at bearing developer.When sending picture signal etc. from external device (ED)s such as main frames, image processing system is transported to developer on the described relative position with latent image-use that image carrier carried by developer carrier and develops and form the developer picture, and this developer looked like to be transferred on the medium, finally on medium, form image.

In addition, in above-mentioned image processing system, when described sub-image being developed, the parts that alternating voltage imposed on described developer carrier are arranged by developer, described alternating voltage comprises: first voltage is used for pushing developer to described image carrier from developer carrier; And second voltage, be used for pushing developer to described developer carrier (open flat 5-No. 142950 communiques, spies with reference to the Japanese documentation spy and open communique 2004-No. 219640) from described image carrier.

Summary of the invention

Consider and on the surface of developer carrier, to carry sufficient developer etc. (in other words, the surface area on the described surface of bearing developer be an enough big value etc.), the regular recess that disposes is set on the surface of this developer carrier sometimes.

But toner is embedded in this recess easily, and the tendency of the rotation that worsens toner is arranged in this recess.In addition, have with the developer carrier butt, this developer carrier is carried the image processing system of the charged live part of developer in, in recess, (compare) live part the pressing force of developer is weakened, thereby might carry out frictional electrification rightly with protuberance.

Because above-mentioned situation makes the developer that is arranged in recess charged insufficient easily, so this toner becomes the main cause that so-called photographic fog (カ Block リ) takes place.

The present invention finishes in view of the above problems, and its purpose is to prevent rightly the generation of photographic fog.

The present invention mainly is following image processing system.Image processing system has: image carrier is used to carry sub-image; Developer carrier has the recess that rule disposes from the teeth outwards, transfers by the state backspin at bearing developer this developer is transported on the relative position relative with described image carrier; The alternating voltage applying unit, in order described sub-image to be developed and alternating voltage to be imposed on described developer carrier by being transported to described developer on the described relative position, described alternating voltage comprises: first voltage, push developer to described image carrier from described developer carrier; Second voltage is pushed developer to described developer carrier from described image carrier; Here, the size in the cycle of described alternating voltage is below the value that obtains after the translational speed on the surface of the minimum widith of the circumferencial direction of described developer carrier this developer carrier during divided by described developer carrier rotation of described recess.

Record by this instructions and accompanying drawing comes clear and definite further feature of the present invention.

Description of drawings

Fig. 1 is the figure that expression constitutes the main composition parts of printer 10;

Fig. 2 is the block diagram of control module of the printer 10 of presentation graphs 1;

Fig. 3 A is the synoptic diagram of expression photoreceptor 20 and charged elements 30;

Fig. 3 B is the synoptic diagram that expression imposes on the charged bias voltage of charged roller 31;

Fig. 4 is the synoptic diagram of developing apparatus;

Fig. 5 is the sectional view of the main composition parts of expression developing apparatus;

Fig. 6 is the schematic perspective view of developer roll 510;

Fig. 7 is the front schematic view of developer roll 510;

Fig. 8 is the synoptic diagram of the cross sectional shape of expression slot part 512;

Fig. 9 is the enlarged diagram of Fig. 7;

Figure 10 is the stereographic map of limiting scraper 560;

Figure 11 is the stereographic map of support 526;

Figure 12 is the stereographic map of representing to be assembled with support 526, going up the situation of seal member 520, limiting scraper 560 and developer roll 510;

Figure 13 is the stereographic map that expression support 526 is installed in the situation on the housing 540;

Figure 14 is the synoptic diagram that expression imposes on the development bias voltage of developer roll 510;

Figure 15 is the key diagram of superiority that is used to illustrate the printer 10 of present embodiment;

Figure 16 A is the synoptic diagram of the density unevenness that causes because of the development bias voltage of expression;

Figure 16 B is the synoptic diagram of the density unevenness that causes because of charged bias voltage of expression;

Figure 16 C is the synoptic diagram of the state that strengthens of the degree of indicated concentration inequality;

Figure 17 is the process flow diagram of action that is used to illustrate the printer 10 of this control;

Figure 18 is the chart of the relation of the kind of expression medium and the translational speed V of developer roll 510 etc.;

Figure 19 A be the expression developer roll 510 manufacturing process in developer roll 510 variation synoptic diagram (one of);

Figure 19 B is the synoptic diagram (two) of the variation of the developer roll 510 in the manufacturing process of expression developer roll 510;

Figure 19 C is the synoptic diagram (three) of the variation of the developer roll 510 in the manufacturing process of expression developer roll 510;

Figure 19 D is the synoptic diagram (four) of the variation of the developer roll 510 in the manufacturing process of expression developer roll 510;

Figure 19 E is the synoptic diagram (five) of the variation of the developer roll 510 in the manufacturing process of expression developer roll 510;

Figure 20 is the key diagram that is used to illustrate the rolling and processing of developer roll 510;

Figure 21 is the process flow diagram that is used to illustrate the assemble method of yellow developing apparatus 54;

Figure 22 A be the expression developer roll 510 surface configuration variation figure (one of);

Figure 22 B is the figure (two) of variation of the surface configuration of expression developer roll 510;

Figure 22 C is the figure (three) of variation of the surface configuration of expression developer roll 510;

Figure 23 A be the variation of expression development bias voltage figure (one of);

Figure 23 B is the figure (two) of the variation of expression development bias voltage;

Figure 24 is the key diagram that presentation video forms the outward appearance formation of system;

Figure 25 is the block diagram of the formation of expression image formation system shown in Figure 24.

Label declaration

10 printers, 20 photoreceptors, 30 charged elements, 31 charged roller, 32 bands, 33 bearings, 34 springs, 35 clearers, 40 exposing units, 50 YMCK developing cells, the 50a central shaft, 51 black developing devices, 52 magenta developing apparatuss, 53 cyan developing apparatuss, 54 yellow developing apparatuss, 55a, 55b, 55c, the 55d maintaining part, 60 primary transfer unit, 70 intermediate transfer bodies, 75 cleaning units, 76 cleaning baldes, 80 secondary transfer printing unit, 90 fixation units, 92 sheet feed stacker, 94 paper feed rollers, 95 display units, 96 registration rollers, 100 control modules, 101 master controllers, 102 cell controllers, 112 interfaces, 113 video memories, 128 YMCK developing cell Drive and Control Circuit, 129 charged elements control control circuit, 132 alternating voltage applying units, 133 superimposed voltage applying units, 510 developer rolls, the 510a central portion, the 510b axial region, 512 slot parts, 512a first slot part, 512b second slot part, 513 sides, 514 bottom surfaces, 515 end faces, seal member on 520,520a Width end, the 520b bearing surface, the 520c opposing face, seal press member on 524,526 supports, the last sealing of 526a support, 526b developer roll support, 526c limiting scraper support, 530 toner accommodating bodies, the 530a first toner accommodating portion, the 530b second toner accommodating portion, 540 housings, 542 upper casing bodies, 544 lower casing bodies, 545 next doors, 546 housing seal parts, 550 toner supplying rollers, 560 limiting scrapers, the 560a front end, 562 rubber section, the 562a abutting part, 564 rubber bearing portions, the 564a thin plate, 564b thin-plate supporting portion, 564c length direction both ends, end of 564d Width, another end of 564e Width, 572 openings, 574 end seal parts, 576 bearings, 600 pipe fittings, 602 flanges are pressed into portion, 604 flanges, 650 circle moulds, the 650a protuberance, 652 circle moulds, the 652a protuberance, 680 grooves, 700 image formation systems, 702 computing machines, 704 display device, 706 printers, 708 input medias, the 708A keyboard, the 708B mouse, 710 reading devices, the 710A floppy disk drive unit, 710B CD-ROM drive unit, 802 internal storages, 804 hard disk drives, the T toner

Embodiment

Record according to this instructions and accompanying drawing at least can clear and definite following item.

Image processing system has:

Image carrier is used to carry sub-image;

Developer carrier has the recess that rule disposes from the teeth outwards, transfers by the state backspin at bearing developer this developer is transported on the relative position relative with described image carrier;

The alternating voltage applying unit, in order described sub-image to be developed and alternating voltage to be imposed on described developer carrier by being transported to described developer on the described relative position, described alternating voltage comprises: first voltage, push developer to described image carrier from described developer carrier; Second voltage is pushed developer to described developer carrier from described image carrier;

Here, the size in the cycle of described alternating voltage be with described recess below the resulting value of translational speed on the surface of the minimum widith of the circumferencial direction of described developer carrier this developer carrier during divided by described developer carrier rotation.

According to this image processing system, can prevent the generation of photographic fog rightly.

In addition, also can be in the following ways, that is, described recess also can be the two kind spiral slot parts different with respect to the angle of inclination of described circumferencial direction, these two kinds of spiral slot parts cross one another, and form lattice shape.

In addition, also can be in the following ways, that is, described developer carrier has the end face of the rhombus that is surrounded by described two kinds of spiral slot parts, and one in two diagonal line that the end face of this rhombus has along described circumferencial direction.

In addition, also can be in the following ways, that is, described developer carrier has by described two kinds of foursquare end faces that spiral slot part surrounds.

In addition, also can be in the following ways, that is, the voltage that described alternating voltage applying unit imposes on described developer carrier only is described first voltage and described second voltage, described alternating voltage applying unit alternately applies described first voltage and described second voltage.

In addition, also can be in the following ways, that is, described image carrier can be rotated, and the translational speed on the surface of this image carrier when translational speed on the surface of this developer carrier when described developer carrier rotates is rotated with described image carrier is different.

At this moment, it is good to be pulled the charging property of developer on developer carrier side.

In addition, also can be in the following ways, that is, described translational speed is variable, when changing this translational speed, be the size that mode below the value that obtains after divided by described translational speed of described minimum widith changes the cycle of this alternating voltage according to the size in cycle of described alternating voltage.

At this moment, no matter carries out image forms device under what kind of pattern, can play above-mentioned effect,, can prevent the generation of photographic fog rightly that is.

In addition, also can be in the following ways, that is, image processing system also comprises: live part, relative with described image carrier, make this image carrier charged; The superimposed voltage applying unit imposes on described live part with the superimposed voltage of DC voltage and alternating voltage stack; The value that obtains after the size in the cycle of described alternating voltage and the big or small natural several times with cycle of described superimposed voltage and should big or small natural number/one in cycle after the value that obtains all inequality.

At this moment, except can preventing the generation of photographic fog rightly, the value that obtains after the size in the cycle by making alternating voltage and the big or small natural several times with cycle of described superimposed voltage and should big or small natural number/one in cycle after the value that obtains all inequality, the occurrence positions that can prevent two kinds of density unevenness is overlapping continuously, therefore can suppress the showy situation of density unevenness of image.

In addition, also can be in the following ways, that is, described live part is rotatable charged roller, this charged roller is relative with described image carrier across the space.

At this moment, it is more effective to suppress the showy effect of the density unevenness of image.

In addition, also can be in the following ways, promptly, described image carrier can be rotated, described alternating voltage applying unit applies the stipulated time with described first voltage and described second alternating voltage, rotation along with described image carrier, if described image carrier, be positioned on the developing location that develops by the developer that is transported on the described relative position by the charged charged locational part of described live part when being located at described superimposed voltage applying unit and beginning to apply described superimposed voltage, then described alternating voltage applying unit begins to apply described first voltage or described second voltage to described developer carrier.

At this moment, it is more effective to suppress the showy effect of the density unevenness of image.

In addition, also can be in the following ways, promptly, described recess is the two kind spiral slot parts different with respect to the angle of inclination of described circumferencial direction, these two kinds of spiral slot parts cross one another, form lattice shape, described developer carrier has by described two kinds of foursquare end faces that spiral slot part surrounds, and one in two diagonal line that this foursquare end face has along described circumferencial direction.

Image forming method comprises following method:

The translational speed on the surface of this developer carrier when changing the developer carrier rotation, described developer carrier has the recess of rule configuration from the teeth outwards, transfers by the state backspin at bearing developer this developer is transported on the relative position relative with image carrier;

It according to the size in cycle of alternating voltage the size that condition below the value that obtains after divided by described translational speed after changing along the minimum widith of the circumferencial direction of described developer carrier of described recess changes the cycle of described alternating voltage, described alternating voltage comprises: first voltage, push developer to described image carrier from described developer carrier; Second voltage is pushed developer to described developer carrier from described image carrier;

According to the value that obtains after the big or small natural several times with cycle of the superimposed voltage of DC voltage and alternating voltage stack and should big or small natural number/one in cycle after the value that obtains all change the size in the cycle of this superimposed voltage with the condition that varies in size in cycle after changing of described alternating voltage;

Cycle size described superimposed voltage is after changing imposed on the live part relative with described image carrier, make this image carrier charged;

Cycle size described alternating voltage is after changing imposed on described developer carrier, the sub-image that described image carrier carried is developed by the described developer that is transported on the described relative position.

According to above-mentioned image forming method, even change the translational speed of developer carrier, also can prevent the generation of photographic fog rightly, and suppress the showy situation of density unevenness of image.

In addition, also can be in the following ways, promptly, the kind that can form the medium of image is common paper and ground paper, when on described common paper, forming image, strengthen the translational speed on the surface of described developer carrier, when on described ground paper, forming image, reduce the translational speed on the surface of described developer carrier.

At this moment,, also can prevent the generation of photographic fog rightly, and suppress the showy situation of density unevenness of image even change the kind of medium.

Image formation system has:

Computing machine;

Image processing system can be connected with this computing machine, comprising: image carrier is used to carry sub-image; Developer carrier has the recess that rule disposes from the teeth outwards, transfers by the state backspin at bearing developer this developer is transported on the relative position relative with described image carrier; The alternating voltage applying unit, in order described sub-image to be developed and alternating voltage to be imposed on described developer carrier by being transported to described developer on the described relative position, described alternating voltage comprises: first voltage, push developer to described image carrier from described developer carrier; Second voltage is pushed developer to described developer carrier from described image carrier; The size in the cycle of described alternating voltage be with described recess below the resulting value of translational speed on the surface of the minimum widith of the circumferencial direction of described developer carrier this developer carrier during divided by described developer carrier rotation.

According to this image formation system, can prevent the generation of photographic fog rightly.

The whole configuration example of image processing system

Below, to be example, use Fig. 1 that its briefing is described as the laser printer of image processing system (below, be also referred to as printer) 10.Fig. 1 is the figure that expression constitutes the main composition parts of printer 10.In addition, in Fig. 1, represent above-below direction with arrow, for example, sheet feed stacker 92 is configured in the bottom of printer 10, and fixation unit 90 is configured in the top of printer 10.

As shown in Figure 1, the printer 10 of present embodiment has along the sense of rotation as the photoreceptor 20 of an example of the image carrier that is used to carry sub-image: charged elements 30; Exposing unit 40; YMCK developing cell 50; Primary transfer unit 60; Intermediate transfer body 70; Cleaning unit 75; And have: secondary transfer printing unit 80; Fixation unit 90; As user oriented notice parts and the display unit 95 that constitutes by liquid crystal panel; And the control said units waits the control module 100 of the action of managing printing machine.

Photoreceptor 20 has conductive substrate material cylindraceous and is formed on photographic layer on the outer peripheral face of this conductive substrate material, this photoreceptor 20 can be that the center is rotated with the central shaft, in the present embodiment, shown in the arrow among Fig. 1, this photoreceptor 20 turns clockwise.

Charged elements 30 is the devices that are used to make photoreceptor 20 charged.These charged elements 30 back are described in detail.Exposing unit 40 is the devices that form sub-image by irradiating laser on charged photoreceptor 20.This exposing unit 40 has semiconductor laser, polygonal mirror, F-θ lens etc., and shines modulated laser according to the picture signal of main frame inputs such as illustrated personal computer, word processor never to charged photoreceptor 20.

YMCK developing cell 50 is the toners that utilize as being contained in an example of the developer in the developing apparatus, promptly, be contained in black (K) toner in the black developing device 51, be contained in magenta (M) toner in the magenta developing apparatus 52, be contained in cyan (C) toner in the cyan developing apparatus 53 and be contained in yellow (Y) toner in the yellow developing apparatus 54, make the device of the image development that on photoreceptor 20, forms.

This YMCK developing cell 50 can make described four developing apparatuss 51,52,53,54 shift positions by being rotated under the state that described four developing apparatuss 51,52,53,54 are installed.Promptly, this YMCK developing cell 50 keeps described four developing apparatuss 51,52,53,54 by four maintaining part 55a, 55b, 55c, 55d, and described four developing apparatuss 51,52,53,54 can be that the center is rotated under the state that keeps its relative position with central shaft 50a.And, relative with photoreceptor 20 selectively when the image formation of 1 page of amount is finished, by the toner that is contained in each developing apparatus 51,52,53,54 sub-image that forms on photoreceptor 20 is developed successively.Described four developing apparatuss 51,52,53,54 can load and unload with respect to the described maintaining part of YMCK developing cell 50 respectively.In addition, the back will explain each developing apparatus.

Primary transfer unit 60 is the devices that are used for looking like to be transferred at the monotone toner that forms on the photoreceptor 20 on the intermediate transfer body 70, when the toner of 4 kinds of colors of overlapping transfer printing successively, can form the full-color toner picture on intermediate transfer body 70.This intermediate transfer body 70 be by tin evaporation layer is set on the surface of PET film and on its top layer lamination form the endless band that semi-conductive paint forms, this intermediate transfer body 70 is by to drive with the roughly the same peripheral speed rotation of photoreceptor 20.

Secondary transfer printing unit 80 is to be used for looking like to be transferred to device on the media such as paper, film, cloth with being formed on monotone toner picture on the intermediate transfer body 70 or full-color toner.Fixation unit 90 is to be used for will being transferred to that monotone toner picture on the medium or full-color toner are fixed on the medium as fusion and the device that forms permanent image.

Cleaning unit 75 is arranged between primary transfer unit 60 and the charged elements 30, it has the cleaning balde 76 with the rubber system of the surperficial butt of photoreceptor 20, and cleaning unit 75 is to be used for wiping, remove the device that remains in the toner on the photoreceptor 20 off by cleaning balde 76 after toner being looked like be transferred on the intermediate transfer body 70 by primary transfer unit 60.

As shown in Figure 2, control module 100 is made of master controller 101 and cell controller 102, to master controller 101 received image signals and control signal, cell controller 102 is according to controlling described each unit etc. based on the instruction of this picture signal and control signal, thereby forms image.

Below, the action of the printer 10 of above-mentioned formation is described.

At first, when in picture signal and control signal from not shown main frame are imported into printer 10 by interface (I/F) 112 the master controller 101, cell controller 102 is according to controlling from the instruction of this master controller 101, and photoreceptor 20 and intermediate transfer body 70 are rotated under this control.Photoreceptor 20 is in rotation, and is charged successively by charged elements 30 on charged position.

Along with the rotation of photoreceptor 20, the charging zone of photoreceptor 20 arrives exposure position, by exposing unit 40, corresponding to first color, for example the sub-image of the image information of yellow Y forms in this zone.In addition, for YMCK developing cell 50, the yellow developing apparatus 54 that holds yellow (Y) toner is positioned on the developing location relative with photoreceptor 20.Along with the rotation of photoreceptor 20, the sub-image that forms on photoreceptor 20 arrives developing location, develops with Yellow toner by yellow developing apparatus 54.Thereby, on photoreceptor 20, form the Yellow toner picture.Along with the rotation of photoreceptor 20, the Yellow toner picture that forms on photoreceptor 20 arrives the primary transfer position, is transferred on the intermediate transfer body 70 by primary transfer unit 60.At this moment, primary transfer unit 60 is applied in the opposite primary transfer voltage of charge polarity (in the present embodiment, being negative polarity) of polarity and toner T.During this period, photoreceptor 20 contacts with intermediate transfer body 70, and secondary transfer printing unit 80 separates with intermediate transfer body 70 in addition.

For second color, the 3rd color and the 4th color, carry out above-mentioned processing successively by each developing apparatus, the toner corresponding to four kinds of colors of each picture signal is transferred on the intermediate transfer body 70 as overlapping thus.Thereby on intermediate transfer body 70, form the full-color toner picture.

Along with the rotation of intermediate transfer body 70, the full-color toner picture that is formed on the intermediate transfer body 70 arrives the secondary transfer printing position, is transferred on the medium by secondary transfer printing unit 80.Transport medium from sheet feed stacker 92 to secondary transfer printing unit 80 by paper feed roller 94, registration rollers 96.In addition, when carrying out the transfer printing action, secondary transfer printing unit 80 is pressed against on the intermediate transfer body 70 and is applied in secondary transfer printing voltage.

Be transferred to full-color toner picture on the medium by fixation unit 90 heating and pressurizing, be fixed on the medium thereby be melted.

On the other hand, photoreceptor 20 is wiped off attached to its lip-deep toner T by the cleaning balde 76 that is bearing in the cleaning unit 75 after having passed through the primary transfer position, thereby is charged preparing to form next sub-image.The toner T that is wiped off is recycled to the remaining toner recoverer that cleaning unit 75 is had.

The briefing of control module

Below, the formation of control module 100 is described with reference to Fig. 2.The master controller 101 of control module 100 comprises video memory 113, and described video memory 113 is electrically connected with main frame by interface 112, is used to store the picture signal from this main frame input.Cell controller 102 is electrically connected with each unit (charged elements 30, exposing unit 40, YMCK developing cell 50, primary transfer unit 60, cleaning unit 75, secondary transfer printing unit 80, fixation unit 90, display unit 95) of apparatus main body, by receiving the signal of the sensor that has from these unit, detect the state of each unit, simultaneously according to controlling each unit from the signal of master controller 101 inputs.

On the YMCK developing cell Drive and Control Circuit 128 that is connected with YMCK developing cell 50, has alternating voltage applying unit 132 (also abbreviating voltage application portion as).In order to make described image development by toner, this alternating voltage applying unit 132 functions as follows: alternating voltage (below be also referred to as the development bias voltage) is imposed on developer roll 510, form alternating electric field (back will be elaborated) between developer roll 510 and photoreceptor 20.In addition, with charged elements Drive and Control Circuit 129 that charged elements 30 is connected on have superimposed voltage applying unit 133.For making photoreceptor 20 charged, this superimposed voltage applying unit 133 functions as follows: superimposed voltage (below, be also referred to as charged bias voltage) is imposed on charged roller 31, form alternating electric field between charged roller 31 and photoreceptor 20.

Charged elements 30

Below, use Fig. 3 A and Fig. 3 B to illustrate to make the charged charged elements 30 of photoreceptor 20.Fig. 3 A is the synoptic diagram of expression photoreceptor 20 and charged elements 30.Fig. 3 B is the synoptic diagram that expression imposes on the superimposed voltage of charged roller 31.

Charged elements 30 has: charged roller 31, and relative with photoreceptor 20 by the space, an example as making the charged live part of this photoreceptor 20 can be rotated; Clearer 35 (in Fig. 1, not illustrating) with charged roller 31 butts, is used to clean the surface of this charged roller 31.Charged roller 31 is the formation at the coating of the surface coated electric conductivity of metal shaft.In addition, be equipped with at the axial both ends of charged roller 31 with photoreceptor 20 butts be with 32.Because therefore this form clearance G with 32 the external diameter external diameter greater than the central portion of charged roller 31 between this central portion and photoreceptor 20.Thereby charged roller 31 makes photoreceptor 20 charged with contactless state.

In addition, charged elements 30 has: bearing 33, can support charged roller 31 rotatably; Spring 34 is exerted pressure charged roller 31 by this bearing 33 to photoreceptor 20.And charged roller 31 is exerted pressure to photoreceptor 20 by exerting pressure of spring 34, be with thus 32 with photoreceptor 20 butts.

Here, use Fig. 3 B that the charged of photoreceptor 20 is described.When carrying out photoreceptor 20 charged, the superimposed voltage (charged bias voltage) of DC voltage and alternating voltage stack is imposed on charged roller 31 by superimposed voltage applying unit 133.Specifically, will with-580V (component of alternating voltage) be the center ,-540V~-620V between the voltage of swing (component of alternating voltage) impose on charged roller 31.In addition, the size in the cycle of charged bias voltage (should cycle size be designated as T2) is 0.9ms (millisecond).

Developing apparatus

Below, use obviously image device of Fig. 4 to Figure 14.Fig. 4 is the synoptic diagram of developing apparatus.Fig. 5 is the sectional view of the main composition parts of expression developing apparatus.Fig. 6 is the schematic perspective view of developer roll 510.Fig. 7 is the front schematic view of developer roll 510.Fig. 8 is the synoptic diagram of the cross sectional shape of expression slot part 512.Fig. 9 is the enlarged diagram of Fig. 7, and is the figure of expression slot part 512 and end face 515.Figure 10 is the stereographic map of limiting scraper 560.Figure 11 is the stereographic map of support 526.Figure 12 is the stereographic map that is illustrated in the situation that is assembled with seal member 520, limiting scraper 560 and developer roll 510 on the support 526.Figure 13 is the stereographic map that expression support 526 is installed in the situation on the housing 540.Figure 14 is the synoptic diagram that expression imposes on the development bias voltage of developer roll 510.In addition, sectional view shown in Figure 5 is represented to intercept the cross section that developing apparatus obtains with the face perpendicular to length direction shown in Figure 4.In addition, identical with Fig. 1 in Fig. 5, represent above-below direction with arrow, for example, the central shaft of developer roll 510 is positioned at the below of the central shaft of photoreceptor 20.In addition, Fig. 5 represents that yellow developing apparatus 54 is positioned at the state of the developing location relative with photoreceptor 20.In addition, in Fig. 6 to Fig. 9, the size of slot part 512 grades is different with actual size, so that distinguish easily in the drawings.

In YMCK developing cell 50, be provided with: hold black (K) toner black developing device 51, hold magenta (M) toner magenta developing apparatus 52, hold the cyan developing apparatus 53 of cyan (C) toner and the yellow developing apparatus 54 that holds yellow (Y) toner, because the structure of each developing apparatus is identical, therefore only yellow developing apparatus 54 is described below.

Yellow developing apparatus 54 has: as the developer roll 510 of an example of developer carrier, go up seal member 520, toner accommodating body 530, housing 540, toner supplying roller 550, limiting scraper 560, support 526 etc.

Developer roll 510 transfers by the state backspin at carrying toner T and toner T is transported on the relative position (developing location) relative with photoreceptor 20.The parts of this developer roll 510 for constituting by aluminium alloy, ferroalloy etc.

As shown in Figure 6 and Figure 7, in order to carry toner T rightly, developer roll 510 surface of the 510a of portion in the central has slot part 512 as an example of recess.In the present embodiment,, be provided with each other around to two kinds of different spiral slot parts 512 as this slot part 512, that is, and the first slot part 512a and the second slot part 512b.As shown in Figure 7, the first slot part 512a and the second slot part 512b are different with respect to the angle of inclination of the circumferencial direction of developer roll 510, in addition, the length direction of the first slot part 512a all is about 45 degree with the axial acute angle size that becomes of developer roll 510 and the length direction of the second slot part 512b with the described acute angle size that is axially become.In addition, as shown in Figure 8, the X of the first slot part 512a to width and the Y of the second slot part 512b to width be about 50 μ m, the degree of depth of slot part 512 is about 7 μ m, the angle of the v-groove (in Fig. 8, the angle of representing with label α) is about 90 degree.

And slot part 512 comprises bottom surface 514 and side 513, and in the present embodiment, the angle of inclination of side 513 is about 45 degree (with reference to Fig. 8).

As Fig. 6, Fig. 7 and shown in Figure 9, two kinds of spiral slot parts 512 of above-mentioned formation are configured in the surface of the central portion 510a of developer roll 510 regularly, and the formation lattice shape of reporting to the leadship after accomplishing a task mutually.Therefore, the rhombus end face 515 that is surrounded four limits by slot part 512 forms a large amount of meshes on described central portion 510a.

As mentioned above, in the present embodiment, because the length direction of the first slot part 512a all is about 45 ° with the length direction of the described acute angle size that is axially become and the second slot part 512b with the described acute angle size that is axially become, therefore end face 515 has foursquare flat shape, and a circumferencial direction along developer roll 510 in two diagonal line that this end face 515 has, another is along axially.In addition, as shown in Figure 8, the length on one side of foursquare end face 515 is about 30 μ m.

And developer roll 510 is provided with axial region 510b, and this axial region 510b supports (Figure 12) by the developer roll support 526b of support 526 described later via bearing 576, and the free rotary ground supporting developer roll 510 thus.As shown in Figure 5, developer roll 510 is rotated around the direction (being counter clockwise direction in Fig. 5) opposite with the sense of rotation (being clockwise direction in Fig. 5) of photoreceptor 20.In addition, in the present embodiment, when developer roll 510 was rotated, the translational speed V on the surface of developer roll 510 (that is the linear velocity of the lip-deep developer roll 510 of developer roll 510) was 300mm/s.In addition, when photoreceptor 20 was rotated, the translational speed on the surface of photoreceptor 20 (that is, the linear velocity of the lip-deep photoreceptor 20 of photoreceptor 20) was 210mm/s, and developer roll 510 is about 1.4 with respect to the peripheral speed ratio of photoreceptor 20.

In addition, under the relative state of yellow developing apparatus 54 and photoreceptor 20, between developer roll 510 and photoreceptor 20, there is the space.That is, yellow developing apparatus 54 develops to the sub-image that is formed on the photoreceptor 20 with contactless state.In addition, in the printer 10 of present embodiment, when (jumping) visualization way of use jumping is developed to being formed on sub-image on the photoreceptor 20, between developer roll 510 and photoreceptor 20, form alternating electric field (back detailed description).

Housing 540 with integrated a plurality of resinous housing section, be that upper casing body 542 and lower casing body 544 weld and make, portion is formed with the toner accommodating body 530 that is used to hold toner T within it.Toner accommodating body 530 is divided into two toner accommodating portions, i.e. first 530a of toner accommodating portion and second 530b of toner accommodating portion by next door 545, described next door 545 from inwall inwardly (above-below direction of Fig. 5) outstanding and be used to separate toner T.And the top of first 530a of toner accommodating portion and second 530b of toner accommodating portion is communicated with, and limits moving of toner T by next door 545 under state shown in Figure 5.But, when YMCK developing cell 50 is rotated, be contained in toner among first 530a of toner accommodating portion and second 530b of toner accommodating portion and can temporarily concentrate on the position side that is connected of the upper side of developing location, and when turning back to state shown in Figure 5, these toners T can turn back among first 530a of toner accommodating portion and second 530b of toner accommodating portion after mixing.That is, stirred the toner T in the developing apparatus rightly by the rotation of YMCK developing cell 50.

Therefore, in the present embodiment, mixing component is not set in toner accommodating body 530, but can be provided for stirring the mixing component of the toner T that is contained in the toner accommodating body 530 yet.In addition, as shown in Figure 5, (that is, first 530a of toner accommodating portion) bottom has opening 572 to housing 540, and developer roll 510 adjoins this opening 572 and is provided with.

Toner supplying roller 550 is arranged among above-mentioned first 530a of toner accommodating portion, the toner T that this toner supplying roller 550 will be contained among this first toner accommodating 530a of portion is supplied to developer roll 510, and peels off the toner T that remains on the developer roll 510 from developer roll 510 after developing.This toner supplying roller 550 is made by urethane foam etc., and under the state of elastic deformation with developer roll 510 butts.Toner supplying roller 550 is configured in the bottom of first 530a of toner accommodating portion, and the toner T that is contained among first 530a of toner accommodating portion is supplied to developer roll 510 in the bottom of this first toner accommodating 530a of portion by toner supplying roller 550.Toner supplying roller 550 can be that the center is rotated with the central shaft, and its central shaft is positioned at the below of the rotary middle spindle of developer roll 510.In addition, toner supplying roller 550 is around direction (clockwise direction of Fig. 5) rotation opposite with the sense of rotation (counter clockwise direction of Fig. 5) of developer roll 510.

Last seal member 520 is along axial and developer roll 510 butts of developer roll 510, after passing through developing location, the toner T that last seal member 520 allows to remain on the developer roll 510 moves in housing 540, and the toner T in the restriction housing 540 moves outside housing 540.Should go up seal member 520 and be the seal of making by polyethylene film etc.Last seal member 520 is supported by the sealing support 526a that goes up of support 526 described later, and its length direction is along the axial setting (Figure 12) of developer roll 510.The butt position of last seal member 520 and developer roll 510 butts is positioned at the top of the central shaft of developer roll 510.

In addition, face (this face is also referred to as opposing face 520c) and described going up between the sealing support 526a at bearing surface 520b opposition side last seal member 520 and that be connected to developer roll 510 are provided with the upward sealing press member 524 that is formed by foaming ester elastic bodys such as (モ-Le ト プ レ-Application) with the state that compresses, to go up seal member 520 by exerting pressure of sealing press member 524 on this and exert pressure, will go up seal member 520 thus by being pressed on the developer roll 510 to developer roll 510 sides.

Limiting scraper 560 runs through the other end from an axial end of developer roll 510, and by abutting part 562a and developer roll 510 butts, with the bed thickness of the toner T that carried of restriction developer roll 510, in addition, the toner T that is carried to developer roll 510 gives electric charge.As Fig. 5 and shown in Figure 10, this limiting scraper 560 has rubber section 562 and rubber bearing portion 564.

Rubber section 562 is formed by silicon rubber, urethane rubber etc., with developer roll 510 butts.

Rubber bearing portion 564 comprises thin plate 564a and the 564b of thin-plate supporting portion, with its Width one end 564d (that is the end of thin plate 564a side) support rubber portion 562.Thin plate 564a is made by phosphor bronze, stainless steel etc., has elasticity.Thin plate 564a support rubber portion 562 exerts pressure rubber section 562 by being pressed on the developer roll 510 by it.The 564b of thin-plate supporting portion is the metal panel beating that is configured on another end 564e of Width of rubber bearing portion 564, the 564b of this thin-plate supporting portion is being installed under the following state on this thin plate 564a, is supporting end described thin plate 564a and side opposition side support rubber portion 562 that is:.

And limiting scraper 560 is being installed under the following state on this limiting scraper support 526c, that is: the both ends 564c of the length direction of the 564b of thin-plate supporting portion is supported by the limiting scraper support 526c of support 526 described later.

Limiting scraper 560 and the end 564b of thin-plate supporting portion side opposition side, that is, front end 560a does not contact with developer roll 510, and contacts certain amplitude at a distance of the part (that is abutting part 562a) of predetermined distance with developer roll 510 with this front end 560a.That is, limiting scraper 560 is by belly rather than edge and developer roll 510 butts, and the plane and developer roll 510 butts that are had by limiting scraper 560 limit described bed thickness.In addition, limiting scraper 560 is configured to the upstream side of its front end 560a towards the sense of rotation of developer roll 510, promptly so-called reverse (counter) butt.In addition, limiting scraper 560 is positioned at the below of the central shaft of developer roll 510 with the butt position of developer roll 510 butts, and is positioned at the below of the central shaft of toner supplying roller 550.In addition, this limiting scraper 560 also can play the effect that prevents from the toner T leakage of toner accommodating body 530 thus along axial and developer roll 510 butts of developer roll 510.

In addition, as shown in figure 12, end seal parts 574 are arranged in the length direction arranged outside of the rubber section 562 of limiting scraper 560.These end seal parts 574 form by bonded fabric, contact with the axial end portion of developer roll 510 along the periphery of this developer roll 510, thereby can play the effect of toner T from leakage between periphery and the housing 540 that prevent.

Support 526 as shown in figure 11, has for being used to assemble the metal parts of various parts such as developer roll 510: on seal support 526a, be provided with along its length direction (that is, developer roll 510 axially); Developer roll support 526b is arranged on the outside that seals support 526a on described length direction (described axial), intersect with described length direction (described axial); Limiting scraper support 526c intersects with this developer roll support, and is relative with the described length direction end that seals support 526a of going up.

And as shown in figure 12, last seal member 520 is located by last sealing support 526a supporting at its Width end 520a (Fig. 5), and in addition, developer roll 510 is developed roller support 526b supporting at its place, end.

And limiting scraper 560 is limited the 526c of screed support portion supporting at 564c place, the both ends of its length direction.Limiting scraper 560 is bolted on the limiting scraper support 526c, is fixed on thus on the support 526.

Like this, as shown in figure 13, the support 526 that is assembled with seal member 520, developer roll 510 and limiting scraper 560 is across being used to prevent that toner T is installed in above-mentioned housing 540 from the housing seal parts 546 (Fig. 5) that leak between support 526 and the housing 540.

In the yellow developing apparatus 54 of above-mentioned formation, the toner T that toner supplying roller 550 will be contained in the toner accommodating body 530 is supplied to developer roll 510.Along with the rotation of developer roll 510, be supplied to the butt position of the toner T arrival limiting scraper 560 of developer roll 510, by this butt position the time, be limited bed thickness, and be endowed negative charge (being with negative polarity).Be limited bed thickness, given toner T being further rotated on the developer roll 510 of negative charge by developer roll 510, be transported on the relative position (developing location) relative with photoreceptor 20, on this relative position in the sub-image that is formed on the photoreceptor 20 is developed.

Here, use Figure 14 that the development of this sub-image is described.As mentioned above, the printer 10 of present embodiment uses the jump visualization way.When carry out to jump developing, the alternating voltage of square wave is imposed on developer roll 510 by alternating voltage applying unit 132.As shown in figure 14, this alternating voltage comprises the first voltage V1 and the second voltage V2.

The first voltage V1 is used for pushing toner the voltage of photoreceptor 20 to from developer roll 510, and its value is-900V.In the present embodiment, as shown in figure 14, when developing, the current potential of photoreceptor 20 is gone up non-image (part corresponding with white image), in image portion (part corresponding) upward be-50V with black image, and since the toner band on negative polarity, therefore when the first voltage V1 is imposed on developer roll 510, between developer roll 510 and photoreceptor 20, form and push toner the electric field of photoreceptor 20 to from developer roll 510, thereby the toner on the developer roll 510 is moved to photoreceptor 20 those sides.

On the other hand, the second voltage V2 is used for pushing toner the voltage of developer roll 510 to from photoreceptor 20, and its value is 500V.When the second voltage V2 is imposed on developer roll 510, between developer roll 510 and photoreceptor 20, form and push toner the electric field of developer roll 510 to from photoreceptor 20, thereby make the toner on the photoreceptor 20 move (retracting) to developer roll 510 those sides.

And, as shown in figure 14, because the first voltage V1 and the second voltage V2 alternately apply by alternating voltage applying unit 132, therefore when carrying out the development of sub-image, the toner alternate repetition carries out from developer roll 510 to the mobile of photoreceptor 20 with from move (return) of photoreceptor 20 to developer roll 510.

In addition, in the present embodiment, the time that alternating voltage applying unit 132 is continuously applied the first voltage V1 is 0.1ms (millisecond) (that is, dutycycle is 50%) with the time that is continuously applied the second voltage V2.Therefore, the size in the cycle of alternating voltage (should cycle size as period T 1) is 0.2ms (millisecond) (with reference to Figure 14).In addition, alternating voltage applying unit 132 impose on the average voltage of developer roll 510 greater than the current potential of non-image portion (-500V) and less than the current potential of image portion (-50V), its value is-200V (=(-900+500)/2).

Because the rotation of developer roll 510, the toner T that has passed through on the developer roll 510 of developing location passes through from last seal member 520, not by on be recycled in the developing apparatus under seal member 520 situation of wiping off.And the toner T that also remains on the developer roll 510 is peeled off by described toner supplying roller 550.

Relation between the cycle size of the width of slot part 512 and alternating voltage

As mentioned above, consider and on the surface of developer roll 510, to carry sufficient toner etc. (in other words, the surface area on the described surface of carrying toner be an enough big value etc.), the regular recess that disposes is set on the surface of developer roll 510 sometimes.On the developer roll 510 of present embodiment, also be provided with slot part 512 as an example of recess.

But toner is embedded in this slot part 512 easily, and the tendency of the rotation that worsens toner is arranged in this slot part 512.In addition, printer 10 as present embodiment, when having with developer roll 510 butts, as the limiting scraper 560 of the charged live part of toner that this developer roll 510 is carried, in slot part 512, (compare) with end face 515, the pressing force of 560 pairs of toners of limiting scraper is weakened, thereby might carry out frictional electrification rightly.

Because above-mentioned situation makes the toner that is arranged in slot part 512 charged insufficient easily, so this toner becomes the main cause that so-called photographic fog (カ Block リ) takes place.

To this, in the printer 10 of present embodiment, and below the value that the size (period T 1) in the cycle of above-mentioned alternating voltage (development bias voltage) obtains behind the translational speed V on the surface of the minimum widith Lmin of the circumferencial direction of described developer roll 510 developer roll 510 during divided by developer roll 510 rotations for described slot part 512 (T1 ≦ Lmin/V).Satisfy the printer 10 of the present embodiment of above-mentioned relation for the cycle size of the width of slot part 512 and development bias voltage, can prevent the generation of photographic fog rightly.

Below, use Fig. 9 and Figure 15 that this situation is described in more details.As mentioned above, the surface of the developer roll 510 of present embodiment is provided with the two kind spiral slot parts 512 different with respect to the angle of inclination of circumferencial direction, these two kinds spiral slot parts 512 formation lattice shape that crosses one another.In addition, developer roll 510 has by above-mentioned two kinds of foursquare end faces 515 that spiral slot part 512 surrounds, and one in two diagonal line that foursquare end face has along circumferencial direction (Fig. 9).And in such (as shown in Figure 9) developer roll 510, at the width of slot part 512 along the circumferencial direction of developer roll 510, it is several to have defined width L1, width L2 etc., and minimum widith is width Lmin (distance between the AB among Fig. 9) shown in Figure 9.In addition, the value of width Lmin is about 70.71 μ m.

The translational speed V on the surface of developer roll 510 was 300mm/s when as mentioned above, developer roll 510 rotated.The value Lmin/V that obtains behind the translational speed V on the surface of the developer roll 510 when therefore, described minimum widith Lmin is divided by developer roll 510 rotations is about 0.236ms (millisecond).And as shown in figure 14, because the size (period T 1) in the cycle of development bias voltage is 0.2ms, so present embodiment satisfies the relation of T1 ≦ Lmin/V.

Below, use Figure 15 that the generation that can suppress photographic fog when satisfying the concerning of such T1 ≦ Lmin/V why rightly is described.

Figure 15 represents two figure (as last figure and figure below) and time shaft from top to bottom successively.

Certain time t went up developer roll 510 when here, figure below of Figure 15 was illustrated in the development of carrying out described sub-image, and which partly is positioned on the relative position relative with photoreceptor 20.For example, when carrying out the development of sub-image, if the part that label A represents in time t1 Fig. 9 is positioned at described relative position, then from time t1 through about 0.236ms (=Lmin/V) after, by developer roll 510 rotations, the part that label B represents among Fig. 9 is positioned at described relative position.That is, figure below is represented developer roll 510 (between AB) slot part 512 need about 0.236ms by described relative position.

On the other hand, because the size (0.2ms) in the cycle of development bias voltage is below the Lmin/V (0.236ms), therefore when carrying out the development of sub-image, during (between the AB) of developer roll 510 slot part 512 is by described relative position, the amount of the one-period of development bias voltage is applied in to developer roll 510 (with reference to Figure 15).

Promptly, in the printer 10 of present embodiment, during the slot part 512 of the toner of the main cause that carries more conduct generation photographic fog is by described relative position, not only apply and be used for pushing toner the first voltage V1 of photoreceptor 20 to from developer roll 510, also apply the second voltage V2 that is used for toner is retracted from photoreceptor 20 developer roll 510 reliably.Therefore, the toner function that retracts of the second voltage V2 helps and will move from slot part 512 and retract developer roll 510 attached to the photographic fog toner on non-image (part corresponding with white image) of photoreceptor 20, thereby can prevent the generation of photographic fog rightly.

The density unevenness that causes because of development bias voltage and charged bias voltage

As mentioned above, on developer roll 510, be applied with the alternating voltage (development bias voltage) that comprises the first voltage V1 and the second voltage V2, still well-known, because the cause of this development bias voltage can make image generation density unevenness.And this density unevenness is easily every the size (period T 1) in cycle of development bias voltage and take place.Similarly, on charged roller 31, be applied with the superimposed voltage (charged bias voltage) of DC voltage and alternating voltage stack, still well-known, because the alternating voltage component of this charged bias voltage can make image generation density unevenness.And this density unevenness is easily every the size (period T 2) in cycle of charged bias voltage and take place.When above-mentioned two kinds of density unevenness took place, if the occurrence positions of two kinds of density unevenness is overlapping, then density unevenness can be remarkable all the more, thereby the density unevenness in the image can be more showy.

At this phenomenon, use the comparative example shown in Figure 16 A~Figure 16 C to describe particularly below.Figure 16 A is the synoptic diagram of the density unevenness that causes because of the development bias voltage of expression.Figure 16 B is the synoptic diagram of the density unevenness that causes because of charged bias voltage of expression.Figure 16 C is the synoptic diagram of the state that strengthens of the degree of indicated concentration inequality.

Shown in Figure 16 A, every the interval L1 of regulation the density unevenness that causes because of the development bias voltage can take place.This predetermined distance L1 is that the translational speed of photoreceptor 20 multiply by the value that the period T 1 of development bias voltage obtains.Similarly, shown in Figure 16 B, every the interval L2 of regulation the density unevenness that causes because of charged bias voltage can take place.This predetermined distance L2 is that the translational speed of photoreceptor 20 multiply by the value that the period T 2 of charged bias voltage obtains.And above-mentioned two kinds of density unevenness take place independently.

In addition, when forming image, the first occurrence positions overlapping sometimes (with dashed lines area surrounded X1 among Figure 16 C) of the first occurrence positions of the density unevenness that causes because of the development bias voltage and the density unevenness that causes because of charged bias voltage, when the occurrence positions of two kinds of density unevenness was overlapping, density unevenness can be remarkable all the more.At this moment, for example when the value that obtains behind the period T 1 of development bias voltage and period T 2 natural numbers/one with charged bias voltage is identical, the occurrence positions of the density unevenness that causes because of charged bias voltage that takes place afterwards and the occurrence positions overlapping continuously easily (with dashed lines area surrounded X2 among Figure 16 C) of the density unevenness that causes because of the development bias voltage, therefore can be more remarkable every predetermined distance L2 density unevenness, thus density unevenness can dressed to eh nines.

To this, in the printer 10 of present embodiment, as Fig. 3 B and shown in Figure 14, the value that obtains behind value that obtains after the period T 1 (0.2ms) of above-mentioned development bias voltage and the natural several times of period T 2 (0.9ms) with charged bias voltage and natural number/one with this period T 2 is all inequality.That is, there are the relation (n represents nature several times or natural number/one) of T1 ≠ nT2 here, in T1 and T2.At this moment, although the occurrence positions of the density unevenness that causes because of the development bias voltage sometimes also can be overlapping with the occurrence positions of the density unevenness that causes because of charged bias voltage, but, even the occurrence positions of two kinds of density unevenness overlaps, also the situation with above-mentioned comparative example is different, and the occurrence positions of the density unevenness that causes because of the development bias voltage that can prevent to take place thereafter is overlapping continuously with the occurrence positions of the density unevenness that causes because of charged bias voltage.Therefore, can suppress the showy situation of density unevenness in the image.

Like this, in the printer 10 of present embodiment, the period T 1 of development bias voltage and the period T 2 of charged bias voltage satisfy above-mentioned relation, thereby can suppress the showy situation of density unevenness of image.

The change control of the cycle size of development bias voltage and charged bias voltage

As mentioned above, printer 10 can form image on medium, still, as the kind of this medium, special paper such as ground paper, OHP film is for example arranged, and common paper.And printer 10 changes the processing speed (for example, the translational speed V on the surface of the translational speed on the surface of photoreceptor 20, developer roll 510 etc.) of printer according to the kind of medium, with according to the kind of medium and form image rightly.Specifically, when forming image on common paper, printer 10 strengthens above-mentioned processing speed, when forming image on special paper, reduces above-mentioned processing speed.

And, in the printer 10 of present embodiment, for generation that prevents photographic fog rightly and the showy situation of density unevenness that suppresses image, along with the kind according to medium changes the processing speed (the translational speed V on the surface of developer roll 510 also is changed as a result) of printer, carry out the control of size in the cycle of the size in the cycle that changes the development bias voltage and charged bias voltage.Specifically, control module 100 is carried out following control: the size in the cycle of (1) change development bias voltage (below, as period T 1) so that the period T 1 of development bias voltage be with slot part 512 along the minimum widith Lmin of the circumferencial direction of developer roll 510 divided by below the resulting value of above-mentioned translational speed V after changing; (2) change the size (below, as period T 2) in the cycle of charged bias voltage so that after will the period T 2 natural several times of this charged bias voltage value that obtains and the value that will obtain behind this period T 2 natural numbers/one all the period T after changing 1 with the development bias voltage is different.

Below, use Figure 17 that the action example of printer 10 in the described control is described.Figure 17 is the process flow diagram that is used for illustrating the action of described control printer 10.

Exercises when printer 10 is carried out this action mainly realize by control module 100.Especially, in the present embodiment, realize by handling the program that is stored among the ROM by CPU.And this program is made of the code that is used to carry out following exercises.

When being input to picture signal and control signal the printer 10, carry out this control as the computing machine of external device (ED).This control signal comprises and the relevant information of the medium kind of wait being selected by user (specifically, be in " common paper ", " ground paper " and " projection film " some).

At first, whether 100 pairs of medium kinds that control signal comprised of control module and predefined medium kind (here, with " common paper " kind as predefined medium) be consistent judges (step S102).

In the present embodiment, the kind of the medium that control signal comprised is " ground paper ".At this moment, because the kind (" ground paper ") of the medium that control signal comprised and the kind (" common paper ") of predefined medium inconsistent (step S102: deny), so control module 100 changes processing speeds (the translational speed V of developer roll 510) (step S104).

Figure 18 is the chart of the relation of the expression kind of medium and the translational speed V of developer roll 510 etc., is stored among the ROM etc. of control module 100.By this chart as can be known, the translational speed V of developer roll 510 is 300mm/s when " common paper " goes up the formation image, the translational speed V of developer roll 510 is 225mm/s when " ground paper " goes up the formation image, and the translational speed V of developer roll 510 is 150mm/s when " projection film " goes up the formation image.

Because image is formed on " ground paper " in the present embodiment, so control module 100 is changed into 225mm/s with the translational speed V of developer roll 510 by 300mm/s.

When the translational speed V of developer roll 510 was changed, control module 100 changed the period T 1 of development bias voltage and the period T 2 (step S106, S108) of charged bias voltage.

Chart shown in Figure 180 shows the relation between the period T 2 of the period T 1 of the kind of medium and development bias voltage and charged bias voltage.For example, when the translational speed V of developer roll 510 was 225mm/s, the period T 1 of development bias voltage was 0.25ms, and the period T 2 of charged bias voltage is 1.1ms.And by chart as can be known, the translational speed V of developer roll 510 is more little, and the period T 1 of development bias voltage and the period T 2 of charged bias voltage are big more.

In the present embodiment, the translational speed V of developer roll 510 changes to 225mm/s by 300mm/s.Therefore, along with the change of the translational speed V of developer roll 510, control module 100 changes to 0.25ms with the period T 1 of development bias voltage from 0.2ms, and the period T 2 of charged bias voltage is changed to 1.1ms from 0.9ms.

But as mentioned above, when the translational speed V of developer roll 510 was 300mm/s, the period T 1 (0.2ms) of development bias voltage and the period T 2 (0.9ms) of charged bias voltage had two formulas (that is, T1 ≦ Lmin/V, the relation of and T1 ≠ nT2) set up.The period T 1 of development bias voltage and the period T 2 of charged bias voltage be configured to make these two formulas when the translational speed V of developer roll 510 is 225mm/s and described translational speed also set up when being 150mm/s.Therefore, even the translational speed V that changes developer roll 510 according to the kind of medium (for example, even change to 225mm/s from 300mm/s), also can be (promptly according to above-mentioned two formulas, T1 ≦ Lmin/V, and T1 ≠ nT2) mode of establishment changes the period T 1 (0.25ms) of development bias voltage and the period T 2 (1.1ms) of charged bias voltage, therefore can prevent the generation of photographic fog rightly, and suppresses the showy situation of density unevenness of image.

Turn back to process flow diagram shown in Figure 17 below, go on to say the action of printer 10 in this control.

Control module 100 applies charged bias voltage to charged roller 31, makes photoreceptor 20 charged (step S110).In the present embodiment, the charged bias voltage that will make period T 2 change to 1.1ms in step S108 by superimposed voltage applying unit 133 imposes on the charged roller 31 in the rotation, makes photoreceptor 20 charged.

Then, control module 100 applies the development bias voltage to developer roll 510, to the sub-image on the photoreceptor 20 develop (step S112).In the present embodiment, the development bias voltage that will make period T 1 change to 0.25ms in step S106 by alternating voltage applying unit 132 imposes on the developer roll 510 in the rotation, makes image development.

In above-mentioned, control module 100 has changed the translational speed V of developer roll 510, but when the kind of the medium that control signal comprised is consistent with the kind of predefined medium (" common paper ") (step S102: be), control module 100 does not change the translational speed V of developer roll 510.At this moment, control module 100 does not change the period T 1 of development bias voltage and the period T 2 of charged bias voltage yet.That is, the translational speed V of developer roll 510 is 300mm/s, and the period T 1 of development bias voltage is 0.2ms, and the period T 2 of charged bias voltage is 0.9ms.And, apply period T 2 by superimposed voltage applying unit 133 and be the charged bias voltage of 0.9ms, make charged roller 31 charged (step S110), apply period T 1 by alternating voltage applying unit 132 and be the development bias voltage of 0.2ms, make image development (step S112).

At this moment, because above-mentioned two formulas (that is, and T1 ≦ Lmin/V, and T1 ≠ nT2) also set up, therefore can prevent the generation of photographic fog rightly, and suppress the showy situation of density unevenness of image.

The manufacture method of developing apparatus

Here, use the obviously manufacture method of image device of Figure 19 A to Figure 21.Figure 19 A to Figure 19 E is the synoptic diagram of variation of the developer roll 510 in the manufacturing process of expression developer roll 510.Figure 20 is the key diagram that is used to illustrate the rolling and processing of developer roll 510.Figure 21 is the process flow diagram that is used to illustrate the assemble method of yellow developing apparatus 54.In addition, when making developing apparatus, after producing above-mentioned housing 540, support 526, developer roll 510, toner supplying roller 550, limiting scraper 560 etc. respectively, use these parts to implement the assembling of developing apparatus.Here,, the manufacture method of developer roll 510 is described at first, the assemble method of developing apparatus is described thereafter with regard to these member manufacturing method.Below, among black developing device 51, magenta developing apparatus 52, cyan developing apparatus 53 and yellow developing apparatus 54, be that example describes with yellow developing apparatus 54.

The manufacture method of developer roll 510

Here, use Figure 19 A to Figure 20 that the manufacture method of developer roll 510 is described.

At first, shown in Figure 19 A, be ready to pipe fitting 600 as the matrix material of developer roll 510.The wall thickness of this pipe fitting 600 is 0.5~3mm.Then, shown in Figure 19 B, make flange at the both ends of the length direction of this pipe fitting 600 and be pressed into portion 602.This flange is pressed into portion 602 and makes by cut.Then, shown in Figure 19 C, flange 604 is pressed into this flange is pressed in the portion 602.For flange 604 is fixed on the pipe fitting 600 reliably, also can be after being pressed into flange 604 that flange 604 is bonding or be welded on the pipe fitting 600.Then, shown in Figure 19 D, centreless grinding is implemented on the surface of the pipe fitting 600 that is pressed into flange 604.Implement this centreless grinding in whole of this surface, 10 average boldness Rz on this surface behind the centreless grinding are below the 1.0 μ m.Then, shown in Figure 19 E, the pipe fitting 600 that is pressed into flange 604 is implemented rolling and processing.In the present embodiment, implement to use the what is called of two round moulds 650,652 to through feed (through feed) roll extrusion (be also referred to as through-feed rolling, run through roll extrusion) processing.

Promptly, as shown in figure 20, will be with the predetermined pressure (direction of representing this pressure among Figure 20 with label P) of two round mould 650,652 usefulness that clamping is disposed as the mode of the above-mentioned pipe fitting 600 of workpiece by being pressed on this pipe fitting 600, under this state, make these two round moulds 650,652 rotate (with reference to Figure 20) in the same direction.In through feed rolling, by making round mould 650,652 rotations, make pipe fitting 600 go up rotation in the direction (with reference to Figure 20) opposite with the sense of rotation of circle mould 650,652, the direction shown in the label H moves in Figure 20 simultaneously.On the surface of circle mould 650,652, have protuberance 650a, the 652a that is used to form groove 680, make pipe fitting 600 distortion by this protuberance 650a, 652a, and on pipe fitting 600, form groove 680.

Then, after rolling and processing finishes, implement gold-plated to the surface of above-mentioned central portion 510a.In the present embodiment,, but be not limited to this, for example also can use hard chrome plating or plating as this gold-plated electroless plating Ni-P that used.

The assemble method of yellow developing apparatus 54

Below, use Figure 21 that the assemble method of yellow developing apparatus 54 is described.

At first, be ready to (step S2) such as above-mentioned housing 540, support 526, developer roll 510, limiting scrapers 560.Then, on the limiting scraper support 526c that limiting scraper 560 is bolted to support 526, make limiting scraper 560 be fixed on (step S4) on the support 526.In addition, before this step S4, in advance above-mentioned end seal parts 574 are installed on the limiting scraper 560.

Then, developer roll 510 is installed on the support 526 that is fixed with limiting scraper 560 (step S6).At this moment, according to limiting scraper 560 from the axial end of developer roll 510 mode to another end and its butt, developer roll 510 is installed on the support 526.In addition, before this step S6, in advance above-mentioned last seal member 520 is installed on the support 526.

Then, the support 526 that developer roll 510, limiting scraper 560 etc. are installed is installed in (step S8) on the housing 540 by housing seal parts 546, finishes the assembling of yellow developing apparatus 54 thus.In addition, before this step S8, in advance above-mentioned toner supplying roller 550 is installed on the housing 540.

Other embodiment

More than, according to above-mentioned embodiment image processing system of the present invention has been described, still, above-mentioned embodiment is not to limit the present invention just in order to understand the present invention easily.Beyond any doubt, the present invention can change under the situation that does not break away from its purport, improve, and the present invention comprises its equivalent.

In the above-described embodiment, is that example is illustrated as image processing system with the color laser printer of intermediate transfer type, but the present invention can be applied on the various image processing systems such as color laser printer except that the intermediate transfer type, monochrome laser printer, duplicating machine, facsimile recorder.

In addition, for photoreceptor, be not limited to light-sensitive roller that photographic layer constitutes, so-called is set by outer peripheral face at columnar conductive base material, also can be for sensitization band that photographic layer constitutes, so-called being set by surface at the conductive base material of band shape.

In addition, in the above-described embodiment, as shown in Figure 3A, described live part is rotatable charged roller 31, this charged roller 31 by space and photoreceptor 20 relative (that is, and charged roller 31 with photoreceptor 20 discontiguous states under make this photoreceptor 20 charged), but be not limited to this.For example, charged roller 31 also can with photoreceptor 20 state of contact under make this photoreceptor 20 charged.

But well-known, when not contacting with photoreceptor 20 for charged roller 31, being so-called noncontact when charged, easy generation is because of the charged density unevenness that causes.Therefore, the period T 1 of development bias voltage and the period T 2 of charged bias voltage satisfy the effect of printer 10 of above-mentioned embodiment of the relation of T1 ≠ nT2, that is, the effect that can suppress the showy situation of the density unevenness of image is more effective, go up more preferably above-mentioned embodiment in this respect.

In addition, in the above-described embodiment, as shown in figure 19, the kind that can form the medium of image is common paper and ground paper, when on above-mentioned common paper, forming image, strengthen the translational speed V (300mm/s) on the surface of developer roll 510, when on above-mentioned ground paper, forming image, reduce the translational speed V (150mm/s) on the surface of developer roll 510, but be not limited to this.For example, also can change the translational speed V of developer roll 510 according to the environment that printer 10 is set.

When the kind according to medium changed the translational speed V of developer roll 510, owing to form image according to medium, there was the tendency that becomes big in the degree of its change.Therefore, change the period T 1 of development bias voltage and the period T 2 of charged bias voltage, can make above-mentioned two formulas (that is, T1 ≦ Lmin/V, and T1 ≠ nT2) establishment reliably by translational speed V according to developer roll 510.As a result,, also can suppress the generation of photographic fog rightly, and suppress the showy situation of density unevenness of image even change the kind of medium, in this respect, more preferably above-mentioned embodiment.

In addition, in the above-described embodiment, recess is the two kind spiral slot parts 512 different with respect to the angle of inclination of the circumferencial direction of developer roll 510, these two kinds spiral slot parts 512 formation lattice shape that crosses one another, but be not limited to this.For example, recess can not be a flute profile also.In addition, when recess was slot part, slot part can not be a spirality also.In addition, as recess, also a kind of slot part can only be set.

In addition, in the above-described embodiment, developer roll 510 has the end face 515 of the rhombus that is surrounded by above-mentioned two kinds of spiral slot parts 512, in two diagonal line that the end face 515 of this rhombus has one along described circumferencial direction, but be not limited to this.For example, shown in Figure 22 A, two diagonal line that the end face of rhombus has also can be along above-mentioned circumferencial direction.

In addition, in the above-described embodiment, developer roll 510 has by above-mentioned two kinds of foursquare end faces 515 that spiral slot part 512 surrounds, but is not limited to this.For example, shown in Figure 22 B, end face can be the rhombus of non-square.In addition, end face can not be a rhombus, for example, shown in Figure 22 C, also can be circle.In addition, Figure 22 A to Figure 22 C is the figure (in addition, in each figure, as reference information, showing above-mentioned minimum widith Lmin) of variation of the surface configuration of expression developer roll 510.

In addition, in the above-described embodiment, slot part 512 comprises bottom surface 514 and side 513, and the angle of inclination of side 513 is about 45 ° (with reference to Fig. 8), but is not limited to this, and for example, the angle of inclination of side 513 also can be about 90 °.

In addition, in the above-described embodiment, the voltage that alternating voltage applying unit 132 imposes on developer roll 510 only is the first voltage V1 and the second voltage V2, and alternating voltage applying unit 132 alternately applies the first voltage V1 and the second voltage V2, but is not limited to this.For example, alternating voltage applying unit 132 also can apply the alternating voltage shown in Figure 23 A.

In addition, in the above-described embodiment, the dutycycle of alternating voltage is 50%, but is not limited thereto, and also can be the alternating voltage shown in Figure 23 B.

In addition, Figure 23 A and Figure 23 B are the figure (in addition, in each figure, as reference information, showing the big or small T1 in above-mentioned cycle) of the variation of expression alternating voltage.

In addition, in the above-described embodiment, the translational speed on the surface of this photoreceptor 20 was different when the translational speed on the surface of this developer roll 510 was with photoreceptor 20 rotations during developer roll 510 rotations, but was not limited to this, and the translational speed on both surfaces is equated.

The translational speed on the surface of this photoreceptor 20 was not simultaneously when the translational speed on the surface of this developer roll 510 and photoreceptor 20 rotated when developer roll 510 rotations, compare when equating with both translational speeds on surface, when moving photographic fog toner attached to non-image (part corresponding) of photoreceptor 20 from slot part 512 and retract developer roll 510 sides, turn back to end face 515 but not the possibility of slot part 512 uprises by the second voltage V2 with white image.Therefore, the charging property of the toner that returns is good, in this respect, and more preferably above-mentioned embodiment.

The structure of image formation system etc.

Below, with reference to accompanying drawing embodiment as the image formation system of an example of embodiment of the present invention is described.

Figure 24 is the key diagram that presentation video forms the outward appearance formation of system.Image formation system 700 comprises: computing machine 702, display device 704, printer 706, input media 708 and reading device 710.In the present embodiment, computing machine 702 is contained in mini tower (mini tower) the type cabinet, but is not limited to this.Cathode-ray tube (CRT)), plasma display or liquid crystal indicator etc. display device 704 is general to adopt CRT (Cathode RayTube:, but be not limited to this.Printer 706 adopts the printer of above-mentioned explanation.In the present embodiment, input media 708 adopts keyboard 708A and mouse 708B, but is not limited to this.In the present embodiment, reading device 710 adopts floppy disk drive unit 710A and CD-ROM drive unit 710B, but is not limited to this.For example, also can adopt MO (Magneto Optical) disk drive or DVD (Digital Versatile Disk) to wait other devices.

Figure 25 is the block diagram of the formation of expression image formation system shown in Figure 24.In the cabinet that accommodates computing machine 702, also be provided with external memory storages such as internal storages 802 such as RAM and hard disk drive 804.

In the above description, printer 706 is connected with computing machine 702, display device 704, input media 708 and reading device 710 and composing images forms the example of system and is illustrated, but is not limited to this.For example, image formation system also can be made of computing machine 702 and printer 706, and image formation system also can not comprise any in display device 704, input media 708 and the reading device 710.

In addition, printer 706 for example also can have the function separately of computing machine 702, display device 704, input media 708 and reading device 710 or the part of mechanism.As an example, printer 706 can have: carry out the image processing part of Flame Image Process, the recording medium handling part etc. of carrying out the display part of various demonstrations and being used to load and unload recording medium, described recording medium recording is by the view data of photographies such as digital camera.

As above the image formation system of Shi Xianing is better than existing system from system in its entirety.

Claims (14)

1. an image processing system is characterized in that,
Have:
Image carrier is used to carry sub-image;
Developer carrier has the recess that rule disposes from the teeth outwards, transfers by the state backspin at bearing developer this developer is transported on the relative position relative with described image carrier;
The alternating voltage applying unit, in order described sub-image to be developed and alternating voltage to be imposed on described developer carrier by being transported to described developer on the described relative position, described alternating voltage comprises: be used for developer is pushed to first voltage of described image carrier and is used for developer is pushed to from described image carrier second voltage of described developer carrier from described developer carrier
Here, the size in the cycle of described alternating voltage be with described recess below the resulting value of translational speed on the minimum widith of the circumferencial direction of the described developer carrier surface of this developer carrier during divided by described developer carrier rotation.
2. image processing system as claimed in claim 1 is characterized in that,
Described recess is the two kind spiral slot parts different with respect to the angle of inclination of described circumferencial direction, and these two kinds of spiral slot parts cross one another, and forms lattice shape.
3. image processing system as claimed in claim 2 is characterized in that,
Described developer carrier has the end face of the rhombus that is surrounded by described two kinds of spiral slot parts, and one in two diagonal line that the end face of this rhombus has along described circumferencial direction.
4. image processing system as claimed in claim 3 is characterized in that,
Described developer carrier has by described two kinds of foursquare end faces that spiral slot part surrounds.
5. as each described image processing system in the claim 1 to 4, it is characterized in that,
The voltage that described alternating voltage applying unit imposes on described developer carrier only is described first voltage and described second voltage,
Described alternating voltage applying unit alternately applies described first voltage and described second voltage.
6. as each described image processing system in the claim 1 to 4, it is characterized in that,
Described image carrier can be rotated,
The translational speed on the surface of this image carrier was different when the translational speed on the surface of this developer carrier was rotated with described image carrier when described developer carrier rotated.
7. as each described image processing system in the claim 1 to 4, it is characterized in that,
Described translational speed is variable,
When changing this translational speed, change the size in the cycle of this alternating voltage, make that the size in cycle of described alternating voltage is that described minimum widith is divided by below the resulting value of described translational speed.
8. image processing system as claimed in claim 1 is characterized in that,
Also comprise:
Live part, relative with described image carrier, make this image carrier charged;
The superimposed voltage applying unit imposes on described live part with the superimposed voltage of DC voltage and alternating voltage stack;
The value that obtains after the size in the cycle of described alternating voltage and the big or small natural several times with cycle of described superimposed voltage and should big or small natural number/one in cycle after the value that obtains all inequality.
9. image processing system as claimed in claim 8 is characterized in that,
The charged roller of described live part for rotating,
This charged roller is relative with described image carrier across the space.
10. image processing system as claimed in claim 8 or 9 is characterized in that,
Described image carrier can be rotated,
Described alternating voltage applying unit applies the stipulated time with described first voltage and described second alternating voltage,
When described image carrier, when described superimposed voltage applying unit begins to apply described superimposed voltage, be positioned at and carry out charged charged locational part by described live part, when being positioned on the developing location that develops by the developer that is transported on the described relative position along with the rotation of described image carrier, described alternating voltage applying unit begins to apply described first voltage or described second voltage to described developer carrier.
11. image processing system is characterized in that as claimed in claim 8 or 9,
Described recess is the two kind spiral slot parts different with respect to the angle of inclination of described circumferencial direction, and these two kinds of spiral slot parts cross one another, and forms lattice shape,
Described developer carrier has by described two kinds of foursquare end faces that spiral slot part surrounds,
One in two diagonal line that this foursquare end face had along described circumferencial direction.
12. an image forming method is characterized in that,
May further comprise the steps:
The translational speed on the surface of this developer carrier when changing the developer carrier rotation, described developer carrier has the recess of rule configuration from the teeth outwards, transfers by the state backspin at bearing developer this developer is transported on the relative position relative with image carrier;
Change alternating voltage cycle size so that the size in the cycle of this alternating voltage be with described recess along the minimum widith of the circumferencial direction of described developer carrier divided by below the resulting value of described translational speed after changing, described alternating voltage comprises: first voltage is used for pushing developer to described image carrier from described developer carrier; Second voltage is used for pushing developer to described developer carrier from described image carrier;
Change the size in cycle of the superimposed voltage of DC voltage and alternating voltage stack, make the value that obtains after the big or small natural several times with cycle of this superimposed voltage and should big or small natural number/one in cycle after the value that obtains all with the varying in size of cycle after changing of described alternating voltage;
Cycle size described superimposed voltage is after changing imposed on the live part relative with described image carrier, make this image carrier charged;
Cycle size described alternating voltage is after changing imposed on described developer carrier, the sub-image that described image carrier carried is developed by the described developer that is transported on the described relative position.
13. image forming method as claimed in claim 12 is characterized in that,
The kind that can form the medium of image is common paper and ground paper,
When on described common paper, forming image, strengthen the translational speed on the surface of described developer carrier, when on described ground paper, forming image, reduce the translational speed on the surface of described developer carrier.
14. an image formation system is characterized in that,
Have:
Computing machine;
Image processing system can be connected with this computing machine, comprising: image carrier is used to carry sub-image; Developer carrier has the recess that rule disposes from the teeth outwards, transfers by the state backspin at bearing developer this developer is transported on the relative position relative with described image carrier; The alternating voltage applying unit, in order described sub-image to be developed and alternating voltage to be imposed on described developer carrier by being transported to described developer on the described relative position, described alternating voltage comprises first voltage that is used for developer is pushed to from described developer carrier described image carrier, push developer second voltage of described developer carrier to from described image carrier with being used for, the size in the cycle of described alternating voltage be with described recess below the resulting value of translational speed on the surface of the minimum widith of the circumferencial direction of described developer carrier this developer carrier during divided by described developer carrier rotation.
CN2007800040488A 2006-03-02 2007-02-27 Image forming device, image forming method, and image forming system CN101379442B (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2006056830A JP2007233195A (en) 2006-03-02 2006-03-02 Image forming apparatus and image forming system
JP056830/2006 2006-03-02
JP2006297693A JP4595923B2 (en) 2006-11-01 2006-11-01 Image forming apparatus, image forming method, and image forming system
JP297693/2006 2006-11-01
PCT/JP2007/053653 WO2007099961A1 (en) 2006-03-02 2007-02-27 Image forming device, image forming method, and image forming system

Publications (2)

Publication Number Publication Date
CN101379442A true CN101379442A (en) 2009-03-04
CN101379442B CN101379442B (en) 2011-04-13

Family

ID=38553828

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2007800040488A CN101379442B (en) 2006-03-02 2007-02-27 Image forming device, image forming method, and image forming system

Country Status (2)

Country Link
JP (1) JP2007233195A (en)
CN (1) CN101379442B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101482720B (en) * 2008-01-10 2011-08-31 精工爱普生株式会社 Image forming apparatus and an image forming method

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4453751B2 (en) * 2007-12-05 2010-04-21 セイコーエプソン株式会社 Developing device, image forming apparatus, and image forming method
JP5309913B2 (en) * 2007-12-28 2013-10-09 コニカミノルタ株式会社 Toner supply roller, developing device, and image forming apparatus
JP5309681B2 (en) * 2008-05-09 2013-10-09 コニカミノルタ株式会社 Toner supply roller, developing device, and image forming apparatus
JP2009288474A (en) 2008-05-29 2009-12-10 Seiko Epson Corp Image forming apparatus and image forming method
JP2010139609A (en) 2008-12-10 2010-06-24 Seiko Epson Corp Image forming apparatus and image forming method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4027302B2 (en) * 2003-11-11 2007-12-26 株式会社沖データ Image forming apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101482720B (en) * 2008-01-10 2011-08-31 精工爱普生株式会社 Image forming apparatus and an image forming method

Also Published As

Publication number Publication date
CN101379442B (en) 2011-04-13
JP2007233195A (en) 2007-09-13

Similar Documents

Publication Publication Date Title
US6865361B2 (en) Transfer belt unit and image forming apparatus using the same
US6804479B2 (en) Image forming apparatus with test pattern for image control
EP1438638B1 (en) Dynamic end seal for image forming apparatus
US7155151B2 (en) Developer carrier, developing device, image forming apparatus and computer system
US8095032B2 (en) Image forming apparatus with cleaning member
EP2846196B1 (en) Developing device having seal members
CN1573602B (en) Developing apparatus
CN100561372C (en) Imaging device
US6496668B2 (en) Image developing device with sealing members for preventing toner leakage
US7215914B2 (en) Transfer device
US6937835B2 (en) Developer charging unit, developing device, image-forming apparatus, and computer system
CN100533302C (en) Image forming apparatus which avoids defects due to substances bleeding from transferring member
CN100421037C (en) Developing starting method, developing device and processing card box
US20060239724A1 (en) Developing device and image forming apparatus
US6654576B2 (en) System for and method of reducing toner seal leakage by the introduction of a step groove in the developer roller
US8401443B2 (en) Toner-particle bearing roller, developing device, and image forming apparatus
CN103324072A (en) Process cartridge, developing device and image forming apparatus
US7546066B2 (en) Image forming apparatus, image forming system, and image forming method
US7149459B2 (en) Application roller and image forming apparatus
JP3450630B2 (en) Image forming device
US7929884B2 (en) Image forming apparatus, developing unit, and computer system
US20090317138A1 (en) Image forming apparatus
CN102200721B (en) Developing apparatus, process cartridge and image forming apparatus
JP2007127800A (en) Developing device, toner particle carrying roller, image forming apparatus, image forming system and method for manufacturing toner particle carrying roller
US7555252B2 (en) Image forming apparatus that prevents conspicuous unevenness in image density

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110413

Termination date: 20160227

CF01 Termination of patent right due to non-payment of annual fee