CN104062865A - Image Forming Device And Electricity Removing Method Of Image Carrier - Google Patents
Image Forming Device And Electricity Removing Method Of Image Carrier Download PDFInfo
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- CN104062865A CN104062865A CN201410054062.0A CN201410054062A CN104062865A CN 104062865 A CN104062865 A CN 104062865A CN 201410054062 A CN201410054062 A CN 201410054062A CN 104062865 A CN104062865 A CN 104062865A
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Abstract
The invention provides an image forming device, which removes transfer printing memories remained in a photoreceptor and improves an uneven image caused by the transfer printing memories to obtain high-quality images, and an electricity removing method of an image carrier. The image forming device of the embodiment comprises the image carrier, a charged part charging the image carrier, an electricity removing part removing electricity of a charged start area, which is generated by the charged part, of the image carrier, and an image forming part forming the image on the image carrier charged by the charged part.
Description
Technical field
Embodiments of the present invention relate to the image processing system such as printer, compounding machine, relate in particular to image processing system that the transfer printing memory (memory) that residues in photoreceptor is removed and image-carrier except method for electrically.
Background technology
In the image processing system of the electrofax such as duplicating machine, printer mode, there is following device: toner image is being transferred to after thin slice paper, for the transfer printing memory that residues in photoreceptor is possessed multiple except electrical equipment except electricity.In addition, also there is following device: in the time of power connection, photoreceptor is reversed, after utilizing electrified body that photoreceptor is charged, the electric charge on photoreceptor is removed, and the transfer printing memory that residues in photoreceptor is removed.But, seek a kind of during carrying out image formation, the transfer printing that residues in photoreceptor is remembered high precision and the promptly device of removal more.
[prior art document]
[patent documentation]
Patent documentation 1: TOHKEMY 2005-31111 communique
Patent documentation 2: Japanese kokai publication hei 11-258953 communique
Summary of the invention
Technical matters to be solved by this invention is to provide in the time that image forms the transfer printing memory that residues in photoreceptor is removed, improve because the image inequality causing remember in transfer printing, obtain the method for electrically that removes of the image processing system of image of high image quality and image-carrier.
In order to reach above-mentioned purpose, the image processing system of present embodiment comprises: image-carrier; Electro-mechanical part, makes described image-carrier charged; Except electric portion, electricity is removed in the charged charged beginning region of described electro-mechanical part of passing through of described image-carrier; And image forming part, the described image-carrier after charged by described electro-mechanical part forms image.
Brief description of the drawings
Fig. 1 is the summary pie graph that the image forming part of the first embodiment is shown.
Fig. 2 is the diagrammatic illustration figure that the surface potential of the photosensitive drums of the first embodiment is shown.
Fig. 3 be illustrate the first embodiment charged device charging zone and except the diagrammatic illustration figure of the charge removing area of electrical equipment.
Fig. 4 is the curve map except electric result that the first embodiment and comparative example are shown.
Fig. 5 be illustrate the second embodiment charged device charging zone and except the diagrammatic illustration figure of the charge removing area of electrical equipment.
Fig. 6 is the process flow diagram except method for electrically of the image-carrier that the present invention relates to.
Embodiment
Below, embodiment is described.
(the first embodiment)
Referring to figs. 1 through Fig. 4, the image processing system of the first embodiment is described.Fig. 1 is the summary pie graph that the processing unit 10 of an example of the image processing system of the first embodiment is shown.Processing unit 10 comprises around the photosensitive drums 11 as image-carrier: as the charged device 12 of electro-mechanical part, exposer 13, developer 14, transfer implement 16, clearer 17, as except electric portion except electrical equipment 18.But the size of processing unit 10 or allocation position and arrangement angles etc. are not defined.
Photosensitive drums 11 for example possesses negative charging characteristic, and negative charge is given equably photosensitive drums 11 by charged device 12.Be made as φ 30 at the diameter of photosensitive drums, the charged width of charged device 12 is set as to 14mm.
Electro-mechanical part 12 is charged chargers, except electric portion 18 irradiates except electric light, charged charger and photosensitive drums 11 between comprise and will guide to except electric light the gap in charged beginning region.
Exposer 13 is for example laser explosure device, exposer 13 based on view data etc. by Ear Mucosa Treated by He Ne Laser Irradiation in photosensitive drums 11, to form electrostatic latent image in photosensitive drums 11.
Developer 14 is given the toner of negative charging characteristic by the development bias voltage of negative polarity the exposure portion (image forming part (β)) of photosensitive drums 11, by visual the electrostatic latent image in photosensitive drums 11.As long as toner is non-colour killing toner or colour killing toner that for example can colour killing by heating with the temperature of regulation any.Exposer 13 and developer 14 composing images forming portions.The photosensitive drums 11 of this image forming part after charged by electro-mechanical part 12 forms image.
The transfer bias of positive polarity is put on photosensitive drums 11 by transfer implement 16, the toner image in photosensitive drums 11 is needed on to the recording mediums such as such as thin slice P.Clearer 17 is for example removed by cleaning foil the toner that residues in photosensitive drums 11 after transfer printing finishes.Except electrical equipment 18 for example use LED lamp by the wavelength light irradiation with light sensitivity in photosensitive drums 11, the electric charge that residues in photosensitive drums 11 remove electric.Except electrical equipment 18 by inclined light shaft, make the charged beginning region (ε) shown in Fig. 3 (charged and except electricity repeat region) be for example 10% left and right of charging zone entirety.In the first embodiment, the optical axis except electrical equipment 18 is spent towards charged device 12 directions inclinations 15 from for example assigned position.
Consist of these, processing unit 10 utilizes toner to be formed at the latent electrostatic image developing of photosensitive drums 11, and toner image is needed on to thin slice P.Processing unit 10 is being needed on toner image after thin slice P, utilizes clearer 17 that the residual toner of photosensitive drums 11 is removed, and utilizes except electrical equipment 18 is by the residual charge removal of photosensitive drums 11.Processing unit 10, after the residual charge of the photosensitive drums 11 that image formation processing is in advance produced is removed, is implemented follow-up image formation processing.
The electric treatment that removes that the electric charge that residues in photosensitive drums 11 after transfer printing is finished is removed is described in detail.In processing unit 10, through charged, exposure, to develop and finish the surface potential of photosensitive drums 11 in the moment of transfer process be for example the solid line (A) of Fig. 2.In transfer process, for the toner of the negative charging characteristic in photosensitive drums 11 is needed on to thin slice P, the transfer bias of positive polarity is given photosensitive drums 11 by transfer implement 16.Surface potential-the v1 of the surface potential-v2 of the unexposed portion (α) that does not form image that is subject to the photosensitive drums 11 of transfer bias when charged is low.The surface potential that is subject to the image forming part that is attached with toner (β) of the photosensitive drums 11 of transfer bias is for example+v3 to carry out some just charged.
After transfer printing finishes when the electric treatment, except the negative charge residuing in photosensitive drums 11 being removed except electric light 18a that electrical equipment 18 produces.But, in the case of being residual positive charge, except electric light 18a cannot remove residual positive charge in the photosensitive drums 11 of negative charging characteristic.
For example, if only irradiated except electric light 18a at the charge removing area (δ) of the charged starting position f that is adjacent to photosensitive drums 11, the positive charge in photosensitive drums 11 is not removed.If only irradiated except electric light at charge removing area (δ), remove the surface potential of the photosensitive drums 11 after electricity as shown in the solid line of Fig. 2 (B).In the unexposed portion (α) of photosensitive drums 11, negative charge is removed, and surface potential becomes ± and 0 or can not remove again electric residual electric potential (negative potential), but at image forming part (β), positive charge is residual, the surface potential of become+v3.In follow-up image formation processing, there is transfer printing memory in the positive charge that residues in image forming part (β), become the bad reason of image quality on toner image.
As shown in Figure 3, irradiating in the charge removing area (δ) of the charged starting position f adjacency of the photosensitive drums 11 producing with charged device 12 except electric light 18a except electrical equipment 18 of the first embodiment.In addition, except electrical equipment 18 will irradiate the charged beginning region (ε) in the charging zone (γ) after charged by charged device 12 except electric light 18a.Except charge removing area (δ) and charged beginning region (ε) are removed electricity by electrical equipment 18.
Except electrical equipment 18 repeatedly irradiates except electric light 18a with the band electric treatment of charged device 12 in charged beginning region (ε), the electric charge of photosensitive drums 11 is removed.In charged beginning region (ε), the image forming part of just charged photosensitive drums 11 (β) is had after negative potential by charged device 12 is charged, utilization removes electrical equipment 18 negative charge is removed.
End, the upstream 12a of charged device 12 and photosensitive drums 11 for example possess the clearance G of 5mm.Enter the charged beginning region (ε) of photosensitive drums 11 from the electric light 18a that removes except electrical equipment 18 from charged device 12 and the clearance G of photosensitive drums 11.The negative charging that charged beginning region (ε) for example produces by charged device 12, relatively, stays in the reduction that does not affect the scope that image forms before the current potential on photosensitive drums 11 surfaces and charged beginning, becomes for example region till about 5V of reduction.
In charge removing area (δ), except electrical equipment 18 will irradiate in having passed through clean photosensitive drums 11 except electric light 18a, the negative charge in photosensitive drums 11 is removed.In charged beginning region (ε), the irradiation except electric light 18a that repeats negative charging that charged device 12 produces and produce except electrical equipment 18, removes the negative charged particles of unexposed portion (α) and image forming part (β).
At the surface potential except the photosensitive drums 11 of electric end position j by charged beginning region (ε) as shown in the solid line of Fig. 2 (C).In photosensitive drums 11, be removed electric charge by any in unexposed portion (α) and the image forming part (β) of image formation processing in advance, the surface electrical potential difference of unexposed portion (α) and image forming part (β) is roughly ± and 0.
Processing unit 10 will pass through except the photosensitive drums 11 of electric end position j, with the following charged beginning region (ε) except the continuous continuation charging zone (θ) of electric end position j and carry out charged of charged device 12.Processing unit 10 is in charged beginning region (ε) and continue charging zone (θ) by after charged photosensitive drums 11, implements each processing of exposure, development, transfer printing, and the toner image of follow-up image formation processing is formed to thin slice P.
For example,, if the transfer bias of transfer process is strong, even if repeat to be with electric treatment in charged beginning region (ε) and except electric treatment, also exist positive charge a bit to residue in the situation of the image forming part (β) of photosensitive drums 11.Even if removing electric end position j, positive charge residues in photosensitive drums 11 a bit, and the potential difference (PD) of unexposed portion (α) and image forming part (β) is also little.Because the potential difference (PD) of unexposed portion (α) and image forming part (β) is little, therefore transfer printing memory is reduced the impact of toner image.
The solid line D of Fig. 4 illustrates the intensity variation of the transfer bias of transfer implement 16, checking the first embodiment except electrical equipment 18 produce except the transfer printing memory in the photosensitive drums 11 in the situation of electric effect.Use irradiate charge removing area (δ) and charged beginning region (ε) except in the first embodiment of electrical equipment 18, as long as the intensity of the transfer bias of transfer implement 16 is moderate (usable range conventionally), transfer printing memory is roughly 0.Therefore, on the toner image producing in successive image formation processing, there is not transfer printing memory, prevent that transfer printing from remembering the image producing bad.
On the other hand, the dotted line E of Fig. 4 illustrates the memory of the transfer printing except the photosensitive drums electric effect that same checking does not remove electric comparative example in charged beginning region (ε).In comparative example, even also can produce transfer printing memory in the situation that a little less than transfer bias, along with transfer bias strengthens, the current potential of transfer printing memory increases.In comparative example, may there is transfer printing memory in existence and to produce image bad on the toner image of successive image formation processing.
In the first embodiment, although the charged characteristic of image-carrier is negative polarity, as long as image-carrier possesses charged characteristic for positive polarity.The image-carrier that is positive polarity at charged characteristic, repeat to utilize electro-mechanical part that image-carrier is carried out in charged beginning region just charged, and by irradiating except electric light except electric portion.
According to the first embodiment, by irradiating in photosensitive drums 11 except electric light 18a except the charge removing area (δ) of electrical equipment 18 after transfer printing finishes.In addition, repeat by charged device 12 charged the charged beginning region (ε) of photosensitive drums 11, and by irradiating in charged beginning region (ε) from clearance G except electric light 18a except electrical equipment 18.In the charged beginning region (ε) of photosensitive drums 11, with image forming part (β) carried out to negative charging repeatedly irradiate except electric light 18a, the surface electrical potential difference of unexposed portion (α) and image forming part (β) is roughly ± and 0, start image formation processing next time.On the toner image of successive image formation processing, there is not transfer printing memory, obtain the toner image of high-quality.
(the second embodiment)
With reference to Fig. 5, the image processing system of the second embodiment is described.The second embodiment and the first embodiment except electric portion different.In the second embodiment, give identical symbol to the formation identical with the formation illustrating in above-mentioned the first embodiment, and omit detailed explanation.
As shown in Figure 5, the electric portion that removes that the second embodiment relates to comprises: remove first of electric portion as first and remove electrical equipment 20 and remove second of electric portion as second and remove electrical equipment 21.First removes electric portion 20 removes electricity by charge removing area, and second except electric portion 21 is in the direct of travel of photosensitive drums 11, is positioned at the first downstream except electric portion 20, and electricity is removed in charged beginning region.First for example uses LED lamp except electrical equipment 20 and second removes electrical equipment 21, and the wavelength light irradiation with light sensitivity, in photosensitive drums 11, is removed to electricity by the electric charge that residues in photosensitive drums 11.
First mainly generally perpendicularly irradiates in first charge removing area (δ 1) of the upstream of the charged starting position f of photosensitive drums 11 except electric light 20a first except electrical equipment 20.Second irradiates towards second of the charged beginning region (ε) of photosensitive drums 11 direction and removes electric light 21a from clearance G except electrical equipment 21 is main.Except the charge removing area of the upstream in charged beginning region is removed electricity by electric portion 18.
First removes electric light 20a more effectively removes the negative charge in photosensitive drums 11 at the first charge removing area (δ 1).Second removes electric light 21a removes the negative charge in photosensitive drums 11 at the second charge removing area (δ 2).Second removes the charged beginning of electric light 21a region (ε) repeatedly more effectively removes the electric charge of unexposed portion (α) and image forming part (β) with the band electric treatment of charged device 12.
The unexposed portion (α) of the photosensitive drums 11 after charged beginning region (ε) is passed through and the surface electrical potential difference of image forming part (β) be roughly ± and 0.Therefore, on the toner image of successive image formation processing, there is not transfer printing memory, prevent that transfer printing from remembering the image producing bad.
In the second embodiment, although remove electrical equipment 20 and second except electrical equipment 21 configured separate, except electric portion is not limited thereto by first.Also can be accommodated in same housing removing electric light 20a perpendicular to first of photosensitive drums 11 and removing electric light 21a towards second of charged beginning region (ε) direction.
According to the second embodiment,, the negative charge that residues in photosensitive drums 11 is removed effectively at the first charge removing area (δ 1) except electrical equipment 20 by first.In addition, repeatedly to irradiate except electric light 21a at charged beginning region (ε) and negative charging, the surface electrical potential difference of unexposed portion (α) and image forming part (β) is roughly ± and 0.On the toner image producing in successive image formation processing, there is not transfer printing memory, obtain the toner image of high-quality.
According at least one embodiment described above, repeatedly image-carrier is removed to electricity with the charged beginning of successive image formation processing.By with residue in image-carrier image-carrier charged characteristic reversed polarity electric charge remove after, carry out successive image formation processing.On the toner image of successive image formation processing, there is not transfer printing memory, obtain the toner image of high-quality, prevent from resulting from that the image of transfer printing memory is bad.
And Fig. 6 is the process flow diagram except method for electrically of the image-carrier that the present invention relates to.As shown in Figure 6, the method for electrically that removes of the image-carrier the present invention relates to comprises: charged step (S601), and image-carrier is charged; And except electric step (S603), repeatedly the charged beginning region of described image-carrier is removed to electricity with described charged step.
In addition, except in electric step, the charge removing area of the upstream in described charged beginning region is removed to electricity above-mentioned.
Although the description of several embodiments of the present invention, but these embodiments are to propose as an example, do not limit the intention of scope of invention.These novel embodiments can be implemented with other variety of ways, in the scope of main idea that does not depart from invention, can carry out various omissions, displacement, change.These embodiments or its distortion are included in scope of invention or main idea, are included in invention that the scope of claim the records scope impartial with it simultaneously.
Symbol description
10 processing unit 11 photosensitive drums
12 charged device 16 transfer implements
18 except electrical equipment
Claims (10)
1. an image processing system, is characterized in that, comprising:
Image-carrier;
Electro-mechanical part, makes described image-carrier charged;
Except electric portion, electricity is removed in the charged charged beginning region of described electro-mechanical part of passing through of described image-carrier; And
Image forming part, the described image-carrier after charged by described electro-mechanical part forms image.
2. image processing system according to claim 1, is characterized in that,
The described charge removing area except the upstream of electric portion to described charged beginning region removes electricity.
3. image processing system according to claim 2, is characterized in that,
Describedly comprise except electric portion: first except electric portion, described charge removing area remove electric; And second except electric portion, in the direct of travel of described image-carrier, be positioned at the described first downstream except electric portion, described charged beginning region remove electric.
4. image processing system according to claim 3, is characterized in that,
Described first except electric portion and described second is except electric portion configured separate.
5. according to the image processing system described in any one in claim 1 to 4, it is characterized in that,
Described electro-mechanical part is charged charger, describedly irradiate except electric light except electric portion, described charged charger and described image-carrier between comprise and guide to the gap in described charged beginning region by described except electric light.
6. image processing system according to claim 1, is characterized in that,
Described image processing system also comprises exposer, described exposer based on view data by Ear Mucosa Treated by He Ne Laser Irradiation in described image-carrier, to form electrostatic latent image on described image-carrier.
7. image processing system according to claim 1, is characterized in that,
Described image processing system also comprises developer, and described developer is given described image-carrier by the development bias voltage of negative polarity by the toner of negative charging characteristic, with by visual the electrostatic latent image on described image-carrier.
8. image processing system according to claim 1, is characterized in that,
Described image processing system also comprises transfer implement, and the transfer bias of positive polarity is put on described image-carrier by described transfer implement, so that the toner image on described image-carrier is needed on to recording medium.
Image-carrier except a method for electrically, it is characterized in that, comprising:
Charged step, makes image-carrier charged;
Except electric step, repeatedly electricity is removed in the charged beginning region of described image-carrier with described charged step.
Image-carrier according to claim 9 except method for electrically, it is characterized in that,
Except in electric step, the charge removing area of the upstream in described charged beginning region is removed to electricity described.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-054861 | 2013-03-18 | ||
| JP2013054861A JP5697703B2 (en) | 2013-03-18 | 2013-03-18 | Image forming apparatus and method for neutralizing image carrier |
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| Publication Number | Publication Date |
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| CN104062865A true CN104062865A (en) | 2014-09-24 |
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| CN201410054062.0A Pending CN104062865A (en) | 2013-03-18 | 2014-02-18 | Image Forming Device And Electricity Removing Method Of Image Carrier |
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| JP (1) | JP5697703B2 (en) |
| CN (1) | CN104062865A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105549356A (en) * | 2014-10-24 | 2016-05-04 | 株式会社理光 | Image forming device and electricity-removing method of latent image carrier |
| CN105717762A (en) * | 2014-12-22 | 2016-06-29 | 株式会社理光 | Electric charging-diselectrifying device, process cartridge, and image forming apparatus |
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| CN105549356A (en) * | 2014-10-24 | 2016-05-04 | 株式会社理光 | Image forming device and electricity-removing method of latent image carrier |
| CN105549356B (en) * | 2014-10-24 | 2018-06-26 | 株式会社理光 | Image forming apparatus and sub-image bearing member remove method for electrically |
| CN105717762A (en) * | 2014-12-22 | 2016-06-29 | 株式会社理光 | Electric charging-diselectrifying device, process cartridge, and image forming apparatus |
| CN105717762B (en) * | 2014-12-22 | 2019-05-21 | 株式会社理光 | Except electric charging unit, cartridge processing and image forming apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2014182182A (en) | 2014-09-29 |
| JP5697703B2 (en) | 2015-04-08 |
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Application publication date: 20140924 |