JPS6356988B2 - - Google Patents
Info
- Publication number
- JPS6356988B2 JPS6356988B2 JP55141724A JP14172480A JPS6356988B2 JP S6356988 B2 JPS6356988 B2 JP S6356988B2 JP 55141724 A JP55141724 A JP 55141724A JP 14172480 A JP14172480 A JP 14172480A JP S6356988 B2 JPS6356988 B2 JP S6356988B2
- Authority
- JP
- Japan
- Prior art keywords
- fur brush
- developing
- conductive
- roller
- specific resistance
- 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
Links
- 239000000835 fiber Substances 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 229920001971 elastomer Polymers 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 108091008695 photoreceptors Proteins 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000005513 bias potential Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Classifications
-
- 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
- G03G15/0805—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a brush
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Dry Development In Electrophotography (AREA)
Description
【発明の詳細な説明】
本発明は、たとえば電子複写機、電子印写装置
等に用いられるフアーブラシ式の現像装置に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fur brush type developing device used, for example, in electronic copying machines, electronic printing devices, and the like.
近時、電子複写機等においては、キヤリアア
（鉄粉）を使用しない経済的なフアーブラシ式の
現像装置が提案されている。この種の現像装置と
してはフアーブラシとして長い毛体を用いたフア
ーブラシ現像ローラで感光体の表面をなでるよう
に現像する方式と、フアーブラシとして短い毛体
を使用し芯体を柔くして感光体の表面に接触した
部分が撓むようなフアーブラシ現像ローラを用い
て現像する方式とがある。 Recently, economical fur brush type developing devices that do not use carriers (iron powder) have been proposed for electronic copying machines and the like. This type of developing device uses a fur brush developing roller with long bristles to stroke the surface of the photoconductor, and a fur brush with short bristles to soften the core and develop the surface of the photoconductor. There is a developing method using a fur brush developing roller that bends the part that comes into contact with the roller.
しかしながら、前者および後者はいずれのもの
もフアーブラシとしての毛体は固有抵抗値が高
く、現像画像にかぶりを生じやすい。通常のかぶ
り防止用現像バイアスではかぶりは除去できず高
電圧のバイアスが必要となる。現像バイアスの他
にかぶり防止用ローラを使用する場合もあるが装
置の構造が複雑になり高価なものになるという欠
点がある。 However, in both the former and latter, the bristles serving as fur brushes have a high specific resistance value, and are likely to cause fogging in the developed image. Fog cannot be removed using a normal antifogging developing bias, and a high voltage bias is required. In some cases, a fog prevention roller is used in addition to the developing bias, but the disadvantage is that the structure of the device becomes complicated and expensive.
本発明は、上記事情にもとづきなされたもの
で、その目的とするところは、フアーブラシをカ
ーボンを含有した導電性繊維から形成することに
より、構造の複雑化や大幅のコスト高をまねくこ
となく、かぶりが無く画像濃度の高い良好な現像
画像が得られるようにした現像装置を提供しよう
とするものである。 The present invention has been made based on the above circumstances, and an object of the present invention is to form a fur brush from conductive fibers containing carbon, thereby eliminating fogging without complicating the structure or significantly increasing costs. It is an object of the present invention to provide a developing device that can obtain a good developed image with high image density without any problems.
以下、本発明の一実施例を図面にもとづいて説
明する。第１図中１はトナー収納箱（ホツパー）
と連通した現像容器であり、この現像容器１内に
はその一部を感光体３の表面に接触されたフアー
ブラシ現像ローラ４が収容されており、かぶり防
止用現像バイアス電圧５が印加されるようになつ
ている。 Hereinafter, one embodiment of the present invention will be described based on the drawings. 1 in Figure 1 is a toner storage box (hopper)
A fur brush developing roller 4 whose part is in contact with the surface of the photoreceptor 3 is accommodated in the developing container 1, and a developing bias voltage 5 for preventing fogging is applied thereto. It's getting old.
また、トナー収納箱２のトナー補給口にはトナ
ー補給ローラ６が設けられていて、トナー収納箱
２内のトナー７…はトナー補給ローラ６の回転に
伴つて現像容器１内に供給されるようになつてい
る。 Further, a toner replenishment roller 6 is provided at the toner replenishment port of the toner storage box 2, and the toner 7 in the toner storage box 2 is supplied into the developer container 1 as the toner replenishment roller 6 rotates. It's getting old.
また、上記フアーブラシ現像ローラ４は第２図
にも示すような構成となつている。すなわち、ア
ル材またはステンレス材等で成形された心金とし
ての回転軸８の外周面には、ラテツクスまたは発
泡ポリウレタンからなり、柔軟性に富んだ円筒状
の芯体９が形成されている。さらに、芯体９の外
周面には固有抵抗が102〜103Ω・cmの導電性ゴム
チユーブ１０ａが外嵌されて導電ゴム層１０を形
成している。さらに、導電性ゴムチユーブ１０ａ
の外周面には導電性接着剤１１にて耐摩耗性かつ
導電性ゴムチユーブ１０ａより固有抵抗が104
Ω・cmと高いカーボン含有の導電性繊維たとえば
メガー（ユニチカの商品名）を別珍形態で編んで
なるフアーブラシ１２が接着されている。 Further, the fur brush developing roller 4 has a structure as also shown in FIG. That is, a highly flexible cylindrical core body 9 made of latex or foamed polyurethane is formed on the outer peripheral surface of the rotary shaft 8 as a mandrel made of aluminum or stainless steel. Further, a conductive rubber tube 10a having a specific resistance of 10 2 to 10 3 Ω·cm is fitted onto the outer peripheral surface of the core body 9 to form a conductive rubber layer 10 . Furthermore, a conductive rubber tube 10a
A conductive adhesive 11 is applied to the outer circumferential surface of the rubber tube 10a, which is wear-resistant and conductive, with a specific resistance of 10 4
A fur brush 12 made of conductive fibers with a high carbon content of Ω·cm, such as Megger (trade name of Unitika), woven in a velveteen shape is adhered.
さらに、心金としての回転軸８と導電性ゴムユ
ーブ１０ａは芯体９の両端面に塗布された導電性
接着剤１１，１１を介して接続されており、フア
ーブラシ１２の裏面に導電性ゴムチユーブ１０ａ
を通じて均一なバイアス電位が心金としての回転
軸８から供給できるようになつている。 Furthermore, the rotating shaft 8 as a mandrel and the conductive rubber tube 10a are connected via conductive adhesives 11, 11 applied to both end surfaces of the core body 9, and the conductive rubber tube 10a is attached to the back surface of the fur brush 12.
A uniform bias potential can be supplied from a rotating shaft 8 serving as a mandrel throughout.
しかして、トナー補給ローラ６により現像容器
１内に供給されたトナー７…はフアーブラシ現像
ローラ６のフアーブラシ１２と現像容器１の内壁
面底部との間を搬送されることにより現像時に必
要な帯電量を保持し、末帯電トナーはフアーブラ
シ１２の裏面側から印加されたバイアス電圧によ
りフアーブラシ１２側に回収され、末帯電トナー
によるかぶり現象を確実に防止できることにな
る。 Thus, the toner 7 supplied into the developer container 1 by the toner replenishment roller 6 is transported between the fur brush 12 of the fur brush developer roller 6 and the bottom of the inner wall surface of the developer container 1, so that the amount of charge necessary for development is maintained. The less charged toner is collected on the fur brush 12 side by the bias voltage applied from the back side of the fur brush 12, and the fogging phenomenon caused by the less charged toner can be reliably prevented.
第３図にフアーブラシ１２を形成する導電性繊
維の固有抵抗と複写画像のかぶりと画像濃度の関
係を示す。なお、画像濃度（原稿濃度1.0）を〇
印、かぶり濃度（原稿濃度0.08）を×印で表す。
フアーブラシ１２を形成する導電性繊維の固有抵
抗が108Ω・cmより高くなるとかぶりが発生し始
め、同時に画像濃度の低下が起り、また、1002
Ω・cmより低くなると感光体３を通じて電流が流
れすぎ現像バイアスの電圧が低下し、いわゆるバ
イアスリークが発生しかぶりを生じることにな
り、フアーブラシ１２を形成する導電性繊維の固
有抵抗は103Ω・cm〜107Ω・cmの範囲が望ましい
ことになる。 FIG. 3 shows the relationship between the specific resistance of the conductive fibers forming the fur brush 12, the fogging of the copied image, and the image density. Note that the image density (original density 1.0) is represented by a circle, and the fog density (original density 0.08) is represented by an x.
When the specific resistance of the conductive fibers forming the fur brush 12 becomes higher than 10 8 Ω·cm, fogging begins to occur, and at the same time, image density decreases .
When it is lower than Ω・cm, too much current flows through the photoreceptor 3 and the developing bias voltage decreases, causing so-called bias leak and fogging.The specific resistance of the conductive fibers forming the fur brush 12 is 10 3 Ω.・The range of Ωcm to 10 7 Ω・cm is desirable.
なお、上述の一実施例において、フアーブラシ
１２を形成する導電性繊維メガーを用いたが、メ
ガーの替りにベルトロン（カネボウの商品名）を
使用しても同様の結果が得られた。さらに、水溶
性ブチウールにカーボンを分散させた（分散材料
としてグリセリンを使用）導電性樹脂で通常の繊
維をコーテイングしたものでも同様の結果が得ら
れた。その他、本発明は本発明の要旨を変えない
範囲で種々変形実施可能なことは勿論である。 In the above-mentioned example, conductive fiber Megger was used to form the fur brush 12, but similar results were obtained even if Beltron (trade name of Kanebo) was used instead of Megger. Furthermore, similar results were obtained when ordinary fibers were coated with a conductive resin in which carbon was dispersed in water-soluble buty wool (glycerin was used as the dispersion material). In addition, it goes without saying that the present invention can be modified in various ways without departing from the gist of the invention.
以上説明したように、本発明によれば、かぶり
が無く、画像濃度の高い現像画像が得られる小型
かつ安価な現像装置を提供できるといつた効果を
奏する。 As described above, according to the present invention, it is possible to provide a compact and inexpensive developing device that is free from fog and can produce developed images with high image density.
図面は本発明の一実施例を示すもので、第１図
は概略的構成図、第２図は要部であるフアーブラ
シ現像ローラを一部切欠して示す断面図、第３図
はフアーブラシを形成する繊維の固有抵抗と複写
画像のかぶりと画像濃度の関係を示す説明図であ
る。
１……現像容器、４……フアーブラシ現像ロー
ラ、１２……フアーブラシ。
The drawings show one embodiment of the present invention; FIG. 1 is a schematic configuration diagram, FIG. 2 is a partially cutaway sectional view of the main part of the fur brush developing roller, and FIG. 3 is a diagram showing the formation of the fur brush. FIG. 3 is an explanatory diagram showing the relationship between the specific resistance of fibers, the fog of a copied image, and the image density. 1... Developer container, 4... Fur brush developing roller, 12... Fur brush.
Claims (1)
107Ω・cmの導電性繊維から形成されたフアーブ
ラシを有していることを特徴とする現像装置。1 Specific resistance containing carbon is 10 3 Ω・cm ~
A developing device characterized by having a fur brush made of conductive fibers of 10 7 Ω·cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14172480A JPS5764761A (en) | 1980-10-09 | 1980-10-09 | Developing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14172480A JPS5764761A (en) | 1980-10-09 | 1980-10-09 | Developing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5764761A JPS5764761A (en) | 1982-04-20 |
| JPS6356988B2 true JPS6356988B2 (en) | 1988-11-09 |
Family
ID=15298722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14172480A Granted JPS5764761A (en) | 1980-10-09 | 1980-10-09 | Developing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5764761A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1986055A1 (en) * | 2007-04-24 | 2008-10-29 | AGC Flat Glass Europe SA | Developer unit for an electrophotographic printing device for printing on glass or ceramic material |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4839175A (en) * | 1971-09-17 | 1973-06-08 | ||
| JPS557960U (en) * | 1978-07-01 | 1980-01-19 |
-
1980
- 1980-10-09 JP JP14172480A patent/JPS5764761A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4839175A (en) * | 1971-09-17 | 1973-06-08 | ||
| JPS557960U (en) * | 1978-07-01 | 1980-01-19 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5764761A (en) | 1982-04-20 |
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