CN1139009C - Scraper for developing roll - Google Patents

Scraper for developing roll Download PDF

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Publication number
CN1139009C
CN1139009C CNB961202920A CN96120292A CN1139009C CN 1139009 C CN1139009 C CN 1139009C CN B961202920 A CNB961202920 A CN B961202920A CN 96120292 A CN96120292 A CN 96120292A CN 1139009 C CN1139009 C CN 1139009C
Authority
CN
China
Prior art keywords
colorant
developing roll
flattening device
elastic caoutchouc
smooth
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CNB961202920A
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Chinese (zh)
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CN1152731A (en
Inventor
朴东埙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung Electronics Co Ltd
Original Assignee
Samsung Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Publication of CN1152731A publication Critical patent/CN1152731A/en
Application granted granted Critical
Publication of CN1139009C publication Critical patent/CN1139009C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0806—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller
    • G03G15/0812—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller characterised by the developer regulating means, e.g. structure of doctor blade
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0806—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller
    • G03G15/0808—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller characterised by the developer supplying means, e.g. structure of developer supply roller

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Dry Development In Electrophotography (AREA)

Abstract

The invention provides a colorant leveling device used for developing roller of developing device of photoelectricity recording device. The developing device includes developing roller, feeding roller, leveling scraper which pressure contacts with the developing roller. One end of the leveling scraper is fixed at a position leaving the developing roller with a predetermined distance, and the leveling scraper includes an elastic rubber contacting with the developing roller; a thin metallic sheet fixed to a fixing element and for generating force acting on the elastic rubber and generated by elastic deformation.

Description

The scraper plate that is used for developing roll
Technical field
The present invention relates to the smooth scraper plate of a kind of colorant on the whole, it makes that the lip-deep colorant thickness that is attached to developing roll in the display is even, this display is used to adopt the image recording structure of photoelectric recording technique, as duplicating machine, laser printer or facsimile recorder.
The smooth scraper plate of this colorant makes that the lip-deep colorant thickness of developing roll is even, thereby has guaranteed the stability of picture quality.
Background technology
As shown in Figure 1, the PERD in the existing technology generally includes light-sensitive roller 10.
Said apparatus is charger 11, light source 12, display 13, printhead 14 and cleaning device 15 along the clockwise direction of light-sensitive roller 10 successively.Above-mentioned PERD is provided with paper cassette to hold paper in a side, is provided with fixing device 18, transfer device 16 and supporting plate 19 at opposite side, and fixing device wherein makes colorant photographic fixing on paper.
In a single day charger 11 connects high-voltage DC power supply, with regard to corona discharge, thereby makes the surface charging of light-sensitive roller 10.The upper surface of light-sensitive roller 10 scanned when then, power supply 12 was luminous.
The result of this photoscanning has formed electric potential difference on the surface of light-sensitive roller 10, thereby has produced electrostatic latent image.
Rotation along with light-sensitive roller 10, in case near the electrostatic latent image arrival display 13, colorant on the developing roll 13a of display 13 is just at the latent electrostatic image developing that makes under the use of electric field on the light-sensitive roller 10, and the electrostatic latent image through developing promptly becomes visible image.
Then, be converted on the surface of certain paper that operation above the printhead 14 is passed through at the visual picture that forms on the surface of light-sensitive roller 10.
Paper through printing is passed to fixing device 18 by transfer device 16, carries out photographic fixing on calender roller 18b.The pressure that presses and act on the paper of calender roller 18b all can produce heat.The paper that produces will be transported to supporting plate 19.Afterwards, level to the useless colorant case of outside (not illustrating) attached to the lip-deep colorant of light-sensitive roller 10 by cleaning device.
Above-mentioned this image recording structure is box-shaped usually, and light-sensitive roller, developing apparatus and cleaning device all are arranged in the casing.
Above-mentioned PERD is removed remaining colorant with mechanical means, removes in the process of remaining colorant at cleaning device 15, and the colorant of disposing is deposited in the case, again from this case unloading in a useless colorant case.
At present, the method for above-mentioned traditional cleaning colorant has caused the pollution of environment, more seriously is that the waste that causes also is very big.
Recently, introduced a kind of clearer on the surface of light-sensitive roller, light-sensitive roller rotates in electric field, and scraper is carrying out mechanically smooth operation.
In not having the PERD of above-mentioned clearer, the certain position place below light-sensitive roller is provided with a space, remains in colorant on the light-sensitive roller with collection.As shown in Figure 3, be provided with the device that is used for smooth colorant in the surface of developing roll.Certain position place above the upper surface of developing roll 13a is provided with traditional scraper 20.Agitator 13b in the display 13 is stirring colorant, and the colorant that is stirred is offered the side of developing roll 13a by feed roller 13c.Because the friction effect between developing roll 13a and the feed roller 13c, the colorant that offers developing roll 13a is by triboelectric charging to a certain extent.
The electric field that produces between developing roll 13a and the feed roller 13c makes on the surface of colorant attached to developing roll 13a.Rotation along with developing roll 13a, colorant attached thereto is repaired to such an extent that thickness is even along with rotating by metallic spatula 20, make the coloring agent layer that forms constant thickness on the surface of developing roll 13a, make the lip-deep image developing of light-sensitive roller 10 then, the image on the light-sensitive roller 10 is the electrostatic latent image that produces under electric field action.
Above-mentioned conventional apparatus can not play a role when very few to the lip-deep colorant quantity of developing roll 13a, and this is owing to there is a gap between scraper 20 and developing roll 13a.
That is to say that as shown in Figure 4, be provided at the lip-deep colorant quantity that is used to develop of developing roll very little, printing effect is very poor, the colorant quantity that obtains on the paper is very limited.Consequently printing operation also has after finishing a large amount of colorants to remain on the surface of light-sensitive roller (average residual 20 to 30).
Correspondingly, residual colorant itself is a kind of waste, and the environmental pollution that causes is also very serious.
In addition, the quantity of colorant too much also is not easy to adopt common developing method on the developing roll surface.
Summary of the invention
Correspondingly, the purpose of this invention is to provide the smooth scraper of a kind of colorant, it can make the lip-deep colorant thickness of developing roll even, thereby improves printing effect.
Another object of the present invention provides the smooth scraper of a kind of colorant, and it contacts with the developing roll retention wire, thereby forms the uniform coloring agent layer of thickness.
Further purpose of the present invention provides the smooth scraper of a kind of colorant, is used for developing roll, to clean out unnecessary colorant.
Further purpose of the present invention provides the smooth scraper of a kind of colorant, the elastic caoutchouc that comprises a conduction, this elastic caoutchouc is fixed on the foil, structure is very simple, elastic force by means of this sheet metal, elastic caoutchouc is keeping contacting with developing roll, thereby has improved the quality of printing image.
In order to reach the purpose of these and other, be provided with display at the light-sensitive roller place of adjacent light electrographic device.This display comprises developing roll, feed roller and smooth scraper, developing roll wherein is used to make the lip-deep electrostatic latent image of light-sensitive roller to be able to develop with colorant, feed roller contacts with developing roll, effect by friction force provides colorant to developing roll, smooth scraper and developing roll keep Elastic Contact, so that the colorant on the developing roll is able to is smooth.Above-mentioned smooth scraper comprises an elastic caoutchouc, and an end of this elastic caoutchouc is installed in the position that a preset distance is arranged with it, and the other end then keeps in touch with developing roll.
Above-mentioned smooth scraper comprises an element that makes elastic caoutchouc produce elastic force, thereby can guarantee that smooth scraper contacts with the tight of developing roll.
Description of drawings
The present invention is described in detail below in conjunction with accompanying drawing, by such explanation, can more completely appreciate the present invention, its many advantages are also clearer and more definite, can have better the present invention simultaneously and understand, in the accompanying drawings, the identical identical or similar elements of code representative, wherein:
Fig. 1 is the side view of layout of the PERD of traditional structure;
Fig. 2 is the synoptic diagram of display of the PERD of traditional structure,
Fig. 3 is the structural representation of colorant flattening device in the display of traditional structure;
Fig. 4 is the partial enlarged drawing of the colorant flattening device among Fig. 3;
Fig. 5 is the skeleton view according to a preferred embodiment of the smooth scraper of colorant of the present invention;
Fig. 6 is the synoptic diagram according to a preferred embodiment of the smooth scraper of colorant of the present invention; With
Fig. 7 is the partial enlarged drawing according to the smooth scraper of colorant of the present invention.
Embodiment
Referring now to Fig. 6,, what the figure shows is the colorant flattening device.Side at the light-sensitive roller 1 of photoelectric image device is provided with display 2, it comprises space 3, agitator 4, feed roller 6 and smooth scraper plate 7, space 3 is used for storing and holding colorant 50, agitator 4 is used for stirring the colorant in this space, feed roller 6 is arranged on contiguous agitator 4 and sentences to developing roll 5 provides colorant, and smooth scraper plate 7 is used to make attached to developing roll 5 lip-deep colorants and evenly distributes.
Above-mentioned smooth scraper plate 7 comprises elastic caoutchouc 71, foil 72 and bearing 73, elastic caoutchouc 71 contacts with developing roll 5, foil 72 links to each other with elastic caoutchouc 71, bearing 73 is fixedly mounted on the retaining element 75 end of metal sheet 72, and retaining element 75 is arranged on and the be separated by position of preset distance of developing roll.
Elastic caoutchouc 71 and developing roll 5 are made by conductive rubber, all link to each other with external power supply, and the supply voltage of developing roll 5 is approximately-200～-600 volts.
The volume resistance value of above-mentioned developing roll is approximately 10 6～10 9Ω/cm.
And the direct current supply voltage of the elastic caoutchouc of smooth scraper plate 7 is approximately-200～-800 volts, and its volume resistance value is approximately 10 3～10 9Ω/cm.
Elastic caoutchouc 71 is circular-arc with developing roll 5 contacted parts.
The radius of the above-mentioned limit sword of handling through rounding is approximately 0.5g/cm～50g/cm with developing roll 5 contacted pressure between 0.05 to 0.3mm.Thereby, being pressed against on the surface of developing roll 5 in order to make elastic caoutchouc 71, metallic elastic plate 72 needs slightly distortion, thereby carries out smooth to the colorant in the display.
Be not the example that only is confined to this by one now, describe the course of work of preferred embodiment of the present invention in detail.Start working in case have the preferred embodiment of said structure, light-sensitive roller 1 is charged by charger, through the scanning of the light that comes from light source, forms electrostatic latent image and developed by colorant in display 2.Along with the rotation of agitator 4, store and be contained in the side that colorant in the space 3 of display 2 was stirred and arrived feed roller 6.Feed roller 6 and developing roll rubbing contact, thereby, be carried on the side of developing roll 5 to a certain extent to the colorant charging, and the colorant of charging.
When the rotation along with developing roll arrived the position of contiguous smooth scraper plate 7 attached to its lip-deep colorant, the elastic caoutchouc 71 of smooth scraper plate 7 made the colorant thickness of arrival even.Consequently, colorant is evenly distributed on the surface of developing roll.
Bearing 73 is fixedly mounted on the retaining element 75 of display, and the elastic caoutchouc 71 that is located at foil 72 1 ends acts on the surface of developing roll 5 with constant pressure.
The distortion of foil 72 keeps and the contacting of developing roll 5 elastic caoutchouc, thereby can make colorant more even.
Refer now to Fig. 7, smooth scraper plate has been carried out the diagram of local amplification here.Elastic caoutchouc 71 is line with developing roll 5 and contacts, and contact pressure is approximately 0.5g/cm to 50g/cm.At this moment, carry out uniform treatment attached to the lip-deep colorant of developing roll 5 by elastic caoutchouc 71 unevenly.This is to finish under the elastic force effect that distortion produced by foil 72.
The surface of contact 71a of elastic caoutchouc 71 is circular-arc, thereby has formed the gap of a little wedge shape between the contact edge 71a of elastic caoutchouc 71 and developing roll 5.
Pulverous colorant in above-mentioned wedge gap is along with the friction in the rotation at contact position place on pressurized and the surface attached to developing roll 5.
Consequently, depend on attached to the homogeneity of the colorant on the developing roll 5 and be applied to its lip-deep pressure.It is desirable forming the uniform colorant powder of a layer thickness on developing roll.In addition, test shows on the light-sensitive roller remaining colorant and offers the lip-deep colorant of developing roll ratio quantitatively and be approximately 1: 70.
Thereby the cas fortuit that can't be developed for the zone that prevents to have exactly in the place that colorant is not provided electrostatic latent image takes place, and the velocity of rotation of developing roll is more faster than light-sensitive roller.The rotating ratio of developing roll and light-sensitive roller is between 1: 1.3 to 1: 3, and what this can be according to the lip-deep colorant of developing roll adheres to ratio adjustment.
Because it is fast that the rotating ratio light-sensitive roller of developing roll is wanted, in videograph process, have enough colorants and form coloring agent layer, thereby guarantee the stable image quality printed out.
As mentioned above, preferred embodiment of the present invention can keep the stable while of physical construction can also improve printing effect, and printing cost is also low.

Claims (14)

1. colorant flattening device is used for the developing roll (5) of the display (2) of PERD, and described display (2) is arranged on contiguous light-sensitive roller (1) and locates, and comprising:
Described developing roll (5) is used to make the lip-deep electrostatic latent image of described light-sensitive roller (1) to be able to develop with colorant;
A feed roller (6) contacts with described developing roll (5), and its rotation direction is opposite with developing roll (5), is used to make described colorant triboelectric charging and described colorant is provided; With
A smooth scraper (7) maintains contacting of pressure with described developing roll (5), is used to make the described colorant that adheres on the described developing roll (5) to be able to smooth; One end of wherein said smooth scraper (7) is fixed on the position that a preset distance is arranged with it, and described smooth scraper (7) comprising:
An elastic caoutchouc (71), keep in touch with the surface of developing roll (5) and
A foil (72) is installed on the retaining element (75), and described elastic caoutchouc (71) is applied the power that elastic deformation produced; Wherein, the limit blade branch (71a) of described elastic caoutchouc (71) and described developing roll (5) keep in touch, so that described colorant is able to is smooth, the maintenance of this contact is to be finished by the power that elastic deformation produced that foil (72) is produced.
2. painted flattening device as claimed in claim 1, wherein said foil (72) are installed on the mount pad that is made of metal in the described display (2).
3. between 0.05～0.3mm, described elastic caoutchouc (71) comprises conductive rubber usually for colorant flattening device as claimed in claim 1, the thickness of foil wherein (72).
4. colorant flattening device as claimed in claim 3, the volume resistance value of the described elastic caoutchouc (71) that comprises conductive rubber wherein is usually 10 3～10 8Between Ω/cm.
5. colorant flattening device as claimed in claim 4, the contact pressure on the limit blade branch (71a) of described elastic caoutchouc (71) wherein and the surface of described developing roll (5) is usually between 0.5～50g/cm.
6. colorant flattening device as claimed in claim 1, the limit sword (71a) of described elastic caoutchouc (71) wherein is circular-arc, and its radius is greatly between 0.05～0.3mm.
7. colorant flattening device as claimed in claim 1, external first power supply of making by conductive rubber of described developing roll (5) wherein, the volume resistance value of described developing roll (5) is 10 6～10 9Between Ω/cm.
8. colorant flattening device as claimed in claim 1, the supply voltage of described developing roll (5) wherein is usually between-200～-600 volts.
9. as the wherein any described colorant flattening device of claim 1 to 6, the external second source of described smooth scraper (7) wherein is to provide voltage to it.
10. colorant flattening device as claimed in claim 9, described smooth scraper (7) wherein is provided with a metal bearing, so that this smooth scraper (7) location and fixing.
11. colorant flattening device as claimed in claim 9, wherein said elastic caoutchouc (71) and foil (72) are connected together.
12. colorant flattening device as claimed in claim 9, the deformation direction of described smooth scraper (71) wherein is opposite with the throughput direction that described developing roll (5) is gone up colorant.
13. colorant flattening device as claimed in claim 9, the described light-sensitive roller (1) wherein and the rotating ratio of described developing roll (5) are usually between 1: 1.3～1: 3.
14. colorant flattening device as claimed in claim 9, the external power supply of smooth scraper (7) wherein, the supply voltage of this power supply is usually between-200～-800 volts.
CNB961202920A 1995-10-27 1996-10-28 Scraper for developing roll Expired - Fee Related CN1139009C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR37597/1995 1995-10-27
KR1019950037597A KR0159823B1 (en) 1995-10-27 1995-10-27 Toner regulating apparatus of developing roller
KR37597/95 1995-10-27

Publications (2)

Publication Number Publication Date
CN1152731A CN1152731A (en) 1997-06-25
CN1139009C true CN1139009C (en) 2004-02-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
CNB961202920A Expired - Fee Related CN1139009C (en) 1995-10-27 1996-10-28 Scraper for developing roll

Country Status (2)

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KR (1) KR0159823B1 (en)
CN (1) CN1139009C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6937835B2 (en) * 2002-08-28 2005-08-30 Seiko Epson Corporation Developer charging unit, developing device, image-forming apparatus, and computer system
EP3278182B1 (en) * 2015-07-31 2021-07-28 Hp Indigo B.V. Electrophotographic printing

Also Published As

Publication number Publication date
KR0159823B1 (en) 1999-03-20
CN1152731A (en) 1997-06-25
KR970022141A (en) 1997-05-28

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