JPH0743726Y2 - Wet developing device - Google Patents
Wet developing deviceInfo
- Publication number
- JPH0743726Y2 JPH0743726Y2 JP5916189U JP5916189U JPH0743726Y2 JP H0743726 Y2 JPH0743726 Y2 JP H0743726Y2 JP 5916189 U JP5916189 U JP 5916189U JP 5916189 U JP5916189 U JP 5916189U JP H0743726 Y2 JPH0743726 Y2 JP H0743726Y2
- Authority
- JP
- Japan
- Prior art keywords
- developing
- developing roller
- roller
- photoconductor
- wet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Wet Developing In Electrophotography (AREA)
Description
【考案の詳細な説明】 （産業上の利用分野） 本考案は現像液を使った湿式現像装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a wet developing device using a developing solution.
（従来技術） 従来の湿式現像装置は第２図に示すように、感光体１の
回転方向と同方向に移動する現像ローラ2,3と、該現像
ローラ2,3に現像液を供給する供給口４と、現像ローラ
３の下方に位置して感光体１の移動方向とは反対方向に
移動するスクイズローラ５を有している。6,7は現像ロ
ーラ2,3のブレード、８はスクイズローラ５のスクレー
パである。(Prior Art) As shown in FIG. 2, the conventional wet developing device supplies developing rollers 2 and 3 that move in the same direction as the rotation direction of the photoconductor 1 and a developer that supplies the developing solution to the developing rollers 2 and 3. It has an opening 4 and a squeeze roller 5 located below the developing roller 3 and moving in a direction opposite to the moving direction of the photoconductor 1. 6 and 7 are blades of the developing rollers 2 and 3, and 8 is a scraper of the squeeze roller 5.
（考案が解決しようとする課題） 上記従来技術に於ては現像ローラが感光体に対して順回
転のため感光体とのギャップを最高150mm程度以上にす
ると現像液供給が難しく均一に現像ローラに現像液が供
給できなかった。そのため現像液循環系に異物や固着し
たトナーが混入されると、現像ローラの回転とともに引
き込まれて感光体に傷を付けたり、現像ギャップが狭い
ために感光体と現像ローラ間にあるトナー量が少なく１
本のローラでは充分な現像が不可能で複数本の現像ロー
ラを必要とするので装置が小型化できないという問題点
があった。(Problems to be solved by the invention) In the above-mentioned conventional technique, since the developing roller rotates forward with respect to the photoconductor, if the gap between the photoconductor and the photoconductor is set to about 150 mm or more, it is difficult to supply the developer, and the developing roller is uniformly applied. The developer could not be supplied. Therefore, if foreign matter or adhered toner is mixed in the developer circulation system, it is drawn in as the developing roller rotates and scratches the photoconductor, or the amount of toner between the photoconductor and the development roller is reduced due to the narrow development gap. At least 1
There is a problem that the apparatus cannot be downsized because the book roller cannot sufficiently develop and requires a plurality of developing rollers.
（課題を解決するための手段） 本考案は上記問題点を解決することを目的とし、感光体
の回転方向とは反対方向に移動する現像ローラと現像ロ
ーラ部に液を供給する供給口と、供給された現像液を現
像ローラ部へ拡散し導く拡散板と現像ローラ上の付着液
を除去する部材を有し、更に現像ローラの下方に位置し
て感光体の移動方向とは反対方向に移動するスクイズロ
ーラと、該スクイズローラ上の付着液を除去する部材と
を有していることを特徴とする。(Means for Solving the Problem) The present invention is intended to solve the above problems, and a developing roller that moves in a direction opposite to the rotation direction of a photoconductor, and a supply port that supplies liquid to a developing roller unit, It has a diffusion plate that diffuses the supplied developing solution to the developing roller section and a member that removes the adhering solution on the developing roller. It is located below the developing roller and moves in the direction opposite to the moving direction of the photoconductor. It has a squeeze roller and a member for removing the adhering liquid on the squeeze roller.
（作用） 本考案は感光体の回転方向と逆方向に現像ローラを回転
させたので、感光体と現像ローラとのギャップを広げて
も現像液が現像ローラに均一に供給でき、現像ローラと
感光体間のトナー量が多くなり異物がはさまれ難い。(Operation) In the present invention, since the developing roller is rotated in the direction opposite to the rotating direction of the photoconductor, the developer can be uniformly supplied to the developing roller even if the gap between the photoconductor and the developing roller is widened. The amount of toner between the body increases and it is difficult for foreign matter to be caught.
（実施例） 第１図に示した一実施例に基づいて具体的に説明する。
感光体11の回転方向と逆回転して回転線速を感光体１の
線速の0.5〜３倍程度の現像ローラ12の下流にスクイズ
ローラ13を配置し、感光体11とスクイズローラ13間のギ
ャップl1を感光体11と各現像ローラ12間のギャップl2よ
り小としている。14は現像液供給口、15は該現像液を現
像ローラ12に拡散して供給する拡散板、16は現像ローラ
12のブレード、17は現像ローラ12の下流に配置したスイ
ラーフイルム又はゴムの材質からなるクリーニング部材
である。(Example) A specific example will be described based on an example shown in FIG.
A squeeze roller 13 is arranged downstream of the developing roller 12 having a rotational linear velocity of about 0.5 to 3 times the linear velocity of the photoconductor 1 by rotating in the opposite direction of the photoconductor 11 from between the photoconductor 11 and the squeeze roller 13. The gap l 1 is smaller than the gap l 2 between the photoconductor 11 and each developing roller 12. 14 is a developing solution supply port, 15 is a diffusion plate for diffusing the developing solution to the developing roller 12, and 16 is a developing roller.
The blades 12 and 17 are cleaning members disposed downstream of the developing roller 12 and made of a material such as a water film or rubber.
次に作用について説明する。現像液供給口14から供給さ
れた現像液は拡散板15で均一に拡散されて現像ローラ12
と感光体11のギャップ間に送られる。この時、現像ロー
ラ12が感光体11と逆回転方向に回転しているので、現像
ローラ12への現像液供給が簡単になり現像ローラ12と感
光体11のギャップを順回転の時よりも広げることができ
る。そしてスクイズローラ13と感光体11間のギャップl1
は現像ローラ12と感光体11間のギャップl2より小なので
スクイズローラ13へも充分な現像液が供給されスクイズ
効果が得られる。Next, the operation will be described. The developing solution supplied from the developing solution supply port 14 is uniformly diffused by the diffusion plate 15 and is then developed by the developing roller 12.
And the gap between the photoconductor 11 and. At this time, since the developing roller 12 is rotating in the reverse rotation direction with respect to the photoconductor 11, the supply of the developing solution to the developing roller 12 is simplified, and the gap between the developing roller 12 and the photoconductor 11 is widened as compared with the forward rotation. be able to. Then, the gap l 1 between the squeeze roller 13 and the photoconductor 11
Is smaller than the gap l 2 between the developing roller 12 and the photosensitive member 11, sufficient developer is supplied to the squeeze roller 13 to obtain the squeeze effect.
（効果） 本考案によると、現像ローラが感光体と逆回転方向に回
転している為、現像ローラへの現像液供給が簡単にな
り、現像部ギャップを順回転時よりも広げることが出来
たので 1.現像部ギャップが広く出来た事と回転方向が逆なので
異物が混入してもドラムと現像ローラに挾まれることが
なくドラムキズがなくなった。(Effect) According to the present invention, since the developing roller rotates in the reverse rotation direction with respect to the photoconductor, the supply of the developing solution to the developing roller becomes easy, and the developing unit gap can be widened compared to the forward rotation. Therefore 1. Since the gap of the developing section was widened and the rotating direction was opposite, there was no scratch on the drum because the drum and developing roller did not get caught even if foreign matter entered.
2.現像部ギャップが広がり感光体と現像ローラ間のトナ
ー数が増え、高能率現像が可能となり、現像ローラ１本
で対処出来るようになった為にコンパクト設計ができ
る。2. The gap of the developing section is widened, the number of toners between the photoconductor and the developing roller is increased, and high-efficiency development is possible, and it is possible to deal with with only one developing roller, so a compact design is possible.
3.現像部ギャップが広がり、感光体と現像ローラ間の電
界がまだらになり、エッジ効果が増え低コン再現性等画
像向上につながる。3. The gap of the developing section is widened, the electric field between the photoconductor and the developing roller becomes mottled, and the edge effect is increased, which leads to image improvement such as low contrast reproducibility.
という効果を有するものである。It has the effect of.
第１図は本考案の一実施例正面図、第２図は従来装置の
正面図である。 11……感光体 12……現像ローラ 13……スクイズローラ 14……現像液供給口 15……拡散板 l1……感光体とスクイズローラとの間隔 l2……感光体と現像ローラとの間隔FIG. 1 is a front view of an embodiment of the present invention, and FIG. 2 is a front view of a conventional device. 11 …… photoreceptor 12 …… developing roller 13 …… squeeze roller 14 …… developing solution supply port 15 …… diffuser plate l 1 …… spacing between photoconductor and squeeze roller l 2 …… between photoconductor and developing roller interval
Claims (3)
現像ローラと現像ローラ部に液を供給する供給口と、供
給された現像液を現像ローラ部へ拡散し導く拡散板と現
像ローラ上の付着液を除去する部材を有し、更に現像ロ
ーラの下方に位置して感光体の移動方向とは反対方向に
移動するスクイズローラと、該スクイズローラ上の付着
液を除去する部材とを有していることを特徴とする湿式
現像装置。1. A developing roller that moves in a direction opposite to a rotation direction of a photosensitive member, a supply port for supplying a liquid to a developing roller section, a diffusion plate and a developing roller for diffusing and guiding the supplied developing solution to the developing roller section. A squeeze roller having an upper member for removing the adhered liquid and further moving below the developing roller in a direction opposite to the moving direction of the photosensitive member; and a member for removing the adhered liquid on the squeeze roller. A wet-type developing device characterized by having.
ーラと感光体との間隔よりも大きいことを特徴とする請
求項１記載の湿式現像装置。2. The wet developing apparatus according to claim 1, wherein the distance between the developing roller and the photoconductor is larger than the distance between the squeeze roller and the photoconductor.
〜３倍である事を特徴とする請求項１記載の湿式現像装
置。3. The rotation speed of the developing roller is 0.5 of the photosensitive member speed.
3. The wet developing device according to claim 1, wherein the wet developing device is 3 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5916189U JPH0743726Y2 (en) | 1989-05-24 | 1989-05-24 | Wet developing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5916189U JPH0743726Y2 (en) | 1989-05-24 | 1989-05-24 | Wet developing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02149953U JPH02149953U (en) | 1990-12-21 |
| JPH0743726Y2 true JPH0743726Y2 (en) | 1995-10-09 |
Family
ID=31585415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5916189U Expired - Lifetime JPH0743726Y2 (en) | 1989-05-24 | 1989-05-24 | Wet developing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0743726Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5842105A (en) * | 1997-09-29 | 1998-11-24 | Xerox Corporation | Controlled moisturization of paper to eliminate curl |
-
1989
- 1989-05-24 JP JP5916189U patent/JPH0743726Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02149953U (en) | 1990-12-21 |
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