JPS5870256A - Developing device - Google Patents
Developing deviceInfo
- Publication number
- JPS5870256A JPS5870256A JP56169267A JP16926781A JPS5870256A JP S5870256 A JPS5870256 A JP S5870256A JP 56169267 A JP56169267 A JP 56169267A JP 16926781 A JP16926781 A JP 16926781A JP S5870256 A JPS5870256 A JP S5870256A
- Authority
- JP
- Japan
- Prior art keywords
- developing
- developer
- roll
- roller
- supply
- 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.)
- Pending
Links
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
- G03G15/09—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush
- G03G15/0907—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush with bias voltage
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Developing For Electrophotography (AREA)
- Dry Development In Electrophotography (AREA)
- Control Or Security For Electrophotography (AREA)
- Magnetic Brush Developing In Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
本尭明は電子写真複写機等のlIb7像形成装置におけ
る現像装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a developing device in a IIb7 image forming apparatus such as an electrophotographic copying machine.
従来電子写真複写機では原稿先端等の影が、黒帯状のi
I117gIとなって砿写紙先端に現われ、複写紙の地
肌の美観を損なうばかりでなく、黒帯が複写紙の先端に
現われるため、現像後の搬送経路を汚l\、
染したり、足着器P進入時に定着ロー2を汚しオフセッ
ト現象を招く原因となったりする場合があった。又、画
像と画像の間の非画像部分が現像されて、トナーが過剰
に消費されるという欠点があった。In conventional electrophotographic copying machines, the shadow of the leading edge of the document, etc.
I117gI appears at the leading edge of the copy paper, and not only does it spoil the aesthetic appearance of the background of the copy paper, but also a black band appears at the leading edge of the copy paper, contaminating the conveyance path after development, causing stains, and dirt. When entering the device P, the fixing row 2 may be contaminated, causing an offset phenomenon. Another drawback is that non-image areas between images are developed, resulting in excessive toner consumption.
これを防止する方法として、従来感光体上で黒帯となる
一静電a像をIIjt、により消去する方法が知られて
いる。ところが、この方法F1jt、学系や反射光等の
工夫が必賛となったり、光源の光音の立ち上かりが不充
分でカブリが生じたりする欠点を有している。As a method for preventing this, a method is conventionally known in which an electrostatic a image forming a black band on a photoreceptor is erased using IIjt. However, this method F1jt has drawbacks such as requiring improvements in the science and reflected light, and in that the rise of the light and sound from the light source is insufficient, resulting in fogging.
また、従来、現像を故意に停止させ黒消しを行な5方法
がある。その1つは、現像剤の層厚を規制する規制部材
を境健ローラー@に近づけトナ一層厚を小さくして現像
゛させない方法であるが、この規制部材の移動は機械積
置上、好ましくないし、またトナ一層をローラ表面から
良(除くことも細しい。また′IJ4歇ローラの、回転
を停止させて#4像を行なわない方法があるが、現4a
aI自体の負荷変動が光学系のプレにつながる蝉の欠点
で好ましくない。さらに#i現像極性を移動して3J像
部での穂立ちを規制して現像させない方法もあるが、こ
れも不充分な現像停止効果しか得られなかった。また上
記いずれの従来技術もシャープな視像の0N−OFF作
動には通さなかった。Furthermore, conventionally, there are five methods for intentionally stopping development and performing black erasure. One method is to move a regulating member that regulates the layer thickness of the developer closer to the environmental roller @ to reduce the toner thickness and prevent development, but this movement of the regulating member is undesirable in terms of machine stacking. Also, it is difficult to remove a single layer of toner from the roller surface.Also, there is a method of stopping the rotation of the IJ4 intermittent roller and not performing the #4 image, but the current method is
The load fluctuation of aI itself is undesirable because it leads to failure of the optical system. Furthermore, there is a method in which development is prevented by shifting the #i development polarity to restrict blistering in the 3J image area, but this method also provides only an insufficient effect of stopping development. Further, none of the above-mentioned conventional techniques can pass ON-OFF operation with a sharp visual image.
本発明の目的は、上記従来の欠点に鑑み、謙保持体上の
非ij像部の現像を効果的に抑止する、いわゆる黒消し
を行なう現像装置を提供することにある。SUMMARY OF THE INVENTION In view of the above-mentioned conventional drawbacks, an object of the present invention is to provide a developing device that performs so-called black erasure, which effectively suppresses the development of the non-ij image portion on the holder.
本発明は上記黒消しの方法として上記の如く潜像を消去
する方法で祉なく、現像ローラとこれに現像を供給する
供給ローラを有する現II!器構成で、填健ロー2への
現像剤の供給を上記黒帯(非画像S)に対応する所で停
止させる事により黒帯に対応する潜像を可視化(顕像化
)しない事で黒消しを実施するものである。本発明の2
本ローラ構成においてFi填像ローラー上に現像剤は付
着しないので現像ローラは回転したままでも良いという
利点を有する。また、&1iii4J1都と非画像部の
境界領域の魂Jのシャープな0N−OFFも可能となる
。The present invention uses the method of erasing the latent image as described above as the black erasing method described above, and uses a developing roller having a developing roller and a supply roller that supplies the developing roller to the developing roller. With the device configuration, by stopping the supply of developer to the filter row 2 at the point corresponding to the black belt (non-image S), the latent image corresponding to the black belt is not visualized (visualized), thereby producing a black image. This is for erasing. 2 of the present invention
This roller configuration has the advantage that the developing roller can continue to rotate because the developer does not adhere to the Fi image filling roller. In addition, sharp ON-OFF of the soul J in the boundary area between the &1iii4J1 capital and the non-image area is also possible.
以下回向に基づいて本発明の実施例を詳述する。Embodiments of the present invention will be described in detail below based on the present invention.
第1図に本発明の塊m装置の概略を示す。1は現博スリ
ーブ0−2−12社現像ローラー1に現像剤を供給する
供給ローラー、3は供給ローラー?
1円に配した固足マグネット、4社現俸剤厚み規#i構
像スリーブローラー声木薄層に塗布された現像剤、7は
iA像ススリーブローラー1中に配置した固にマグネツ
)、8tlJ儂剤ホツパー、9Fi像保持体としての感
光ドク^である。尚1ott本出でトナ一層6は感光ド
ラム9に非接触であり、上記交番バイアスによってトナ
ーh3Am位置の空−を往珈動して現鑓が行なわれる。FIG. 1 shows an outline of the lump m device of the present invention. 1 is a supply roller that supplies developer to Genhaku Sleeve 0-2-12 developing roller 1, and 3 is a supply roller? A solid magnet placed in the 1 circle, developer applied to the voice wood thin layer of the image forming sleeve roller #i and a solid magnet placed in the iA image sleeve roller 1), 8tlJ's own hopper, 9Fi photosensitive drum as an image carrier. It should be noted that in the main output of 1 ott, the toner layer 6 is not in contact with the photosensitive drum 9, and the toner layer 6 is moved back and forth at the position h3Am by the above-mentioned alternating bias, and the toner layer 6 is tonerized.
第1図に示す如(、供給ローラ2上において現像剤は厚
み規制部材4により塗布に最適な厚み現像剤層5’にコ
ートされ、楓雪ローラー1と供給ローラー間に電源11
によりバイアスを印加する事で現像ローラー1上に薄層
の現像剤がコートされて現像剤層6となり、感光ドラム
9上の551m位に応じて現像される。現像剤が負極性
のIIL荷を有する場合、図中のバイアス電源11で人
への接続による電界の向きで供給ローラー2から填曽ロ
ーラー1へ塗布されるのであるが、第2図の■に示す様
に非l1i一部のタイきングに合わせて図中第1図の供
給バイアス電源11のスイッチをBへ接続し、第2図■
の如(BをONして供給ローラーからIJfJIQ−ラ
ーへの塗布を停止させ、実質的に感光ドラム上にjAw
されない部分を作る事によって非−g1部黒消しが実行
される。尚、第2図の横軸はドラム上の位置を示してい
る。As shown in FIG.
By applying a bias, a thin layer of developer is coated on the developing roller 1 to form a developer layer 6, which is developed at a distance of about 551 m on the photosensitive drum 9. When the developer has an IIL charge of negative polarity, it is applied from the supply roller 2 to the filler roller 1 in the direction of the electric field due to the connection to the bias power supply 11 in the figure. As shown, the switch of the supply bias power supply 11 shown in Figure 1 is connected to B in accordance with the tiling of the non-l1i part, and the switch of the supply bias power supply 11 in Figure 2 is connected to B.
(Turn on B to stop the coating from the supply roller to the IJfJIQ-ler, and virtually apply jAw onto the photosensitive drum.
The non-g1 part is erased by creating a part that is not marked. Note that the horizontal axis in FIG. 2 indicates the position on the drum.
また第2−中■に示すように非l!1I4asのタイミ
ングに応じて供給ロー2−の回転を停止させ実質的にi
A像させないようにする。以上の実施にあたっては、現
gl器の塗布部から現像部までの回転時間7tを見込ん
で第3図に示すタイムシーケンスを行な5゜
第4図(al F1通常の塗布状塾である。供給σ−2
−2もしくは現像ローラー1F!3のマグネット3又な
い構成とし、現像ローラーへのトナーの塗布を停止させ
て非iilIw部の黒消しを行な5方法を示す。Also, as shown in Part 2-Middle ■, non-l! The rotation of the supply row 2- is stopped in accordance with the timing of 1I4as and the rotation of the supply row 2- is substantially i.
Try not to make it look like A. In carrying out the above, the time sequence shown in Fig. 3 is carried out, taking into account the rotation time of 7t from the coating section to the developing section of the developer. σ−2
-2 or developing roller 1F! 5 methods are shown in which blackening is performed on the non-iiiIw portions by stopping the application of toner to the developing roller using a structure in which the magnet does not have three prongs.
w、5図(II) I (b)は本発明の他の実施例で
ある。第5図(a)の如く供給ローラー2上の厚み規制
部材4に磁性体を用い、供給ローラー内の磁’fM (
N−8)の関に上記規1111J部材4が位置するとき
は現像剤はブラシ状となり、現像ローラー1に塗布でき
る7!1ζ第4図(b)の如く画像先端とタンンングを
取り供給ローラー内のマグネットを回転させて上記規制
部材の直下に磁極N(又#is)を設定すると、塗布の
厚みは著しく減少し薄層となるため現像ローラ!
一斗に現像剤を供給しないこととなり、実質的に非1i
it儂部は現像されな゛い。Figure 5 (II) I (b) is another embodiment of the present invention. As shown in FIG. 5(a), a magnetic material is used for the thickness regulating member 4 on the supply roller 2, and the magnetic 'fM (
When the above-mentioned member 1111J member 4 is located at the point N-8), the developer becomes brush-like and can be applied to the developing roller 1. As shown in FIG. When the magnet is rotated to set the magnetic pole N (also #is) directly under the above-mentioned regulating member, the thickness of the coating is significantly reduced and becomes a thin layer, so the developing roller! This means that the developer will not be supplied to Ito, and it will essentially be non-I.
IT's part is not developed.
以上詳述したように、本発明では供給ローラーから埃Q
j1a−ラーへの現像剤供給を非自偉部に応じて停止さ
せるようにしたので、効果的な黒消しを達成することが
可能となった。As described in detail above, in the present invention, the dust Q from the supply roller is
Since the supply of developer to the j1a-lar is stopped depending on the non-self-extracting area, it is possible to achieve effective black erasure.
第1図社本発明を適用した現像装置の断面図、明図であ
る。
鮪において11−・00机儂ローラー丸2・・・・・供
給ロー?−13,7・・・・・固にマグネット、4@・
拳・・′g4像剤厚み規制部材、5・・ゆ・・絶縁性磁
性−成分現像剤、9噛・・会・感光ドシ^、10・・・
・・交番バイアス電源、11・・・争・供給バイアス電
源を表わす。
出jllA 中ヤノン株式会社
惰5図(0)
筋5図Cb)FIG. 1 is a sectional view and a clear view of a developing device to which the present invention is applied. In tuna, 11-00 machine roller round 2...supply low? -13,7... solid magnet, 4@-
Fist...'g4 Imager thickness regulating member, 5...Yu...Insulating magnetic component developer, 9 bites...Meeting, photosensitive doshi^, 10...
...Represents an alternating bias power supply, 11... Represents an alternating bias power supply. Exit jllA Nakayanon Co., Ltd. Figure 5 (0) Line 5 Figure Cb)
Claims (1)
該ローラーに塊9剤を供給する供給ローラーとを用いる
現像装置において、宙株持体上の非wIJ像部を埃塚せ
し′めないために、上記供給ローラーから現像ローラー
への現像剤の供給を非iIk1g1部のタイミングに合
わせて連断することを特徴とする現前装置。 ■非−9部のタイミングに合わせて上に2机儂ローラと
供給ローラのバイアスの極性を切り変えることを特徴と
する特許請求の範囲ag1墳配賊の現像装置。 (6)非−*Sのタイミングに合わせて上記供給ローン
の回転を停止させることをtrf像とする特許請求の範
!!ltl第1項記載の現像装置。 (4)非画像部のタイミングに合わせて上記供給ロー2
−内の磁界発生手段の磁性位置を変化させることを特徴
とする特許請求の範囲第1項に記載の現像装置。 (5)非−像部のタイミングに合わせて上記現像ローラ
ー内の磁界発生手段のa極位置を変化させることを特徴
とする特許請求の範囲第1項に記載の現gI装置。[Claims] (1) - A developing roller carrying a thin layer of component developer;
In a developing device using a supply roller that supplies a lump 9 agent to the roller, in order to prevent the non-wIJ image area on the suspended holding member from becoming a dust mound, the developer is not supplied from the supply roller to the development roller. An on-site device characterized in that the supply is continuously cut off in accordance with the timing of the non-iIk1g1 portion. (2) A developing device according to claim 1, characterized in that the bias polarity of the upper two mechanical rollers and the supply roller is switched in accordance with the timing of the non-9 part. (6) A claim in which the TRF image is stopping the rotation of the supply loan in accordance with the timing of non-*S! ! The developing device according to item 1. (4) The above supply low 2 is adjusted according to the timing of the non-image area.
The developing device according to claim 1, characterized in that the magnetic position of the magnetic field generating means within - is changed. (5) The developing gI device according to claim 1, wherein the a-pole position of the magnetic field generating means in the developing roller is changed in accordance with the timing of the non-image area.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56169267A JPS5870256A (en) | 1981-10-22 | 1981-10-22 | Developing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56169267A JPS5870256A (en) | 1981-10-22 | 1981-10-22 | Developing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5870256A true JPS5870256A (en) | 1983-04-26 |
Family
ID=15883336
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56169267A Pending JPS5870256A (en) | 1981-10-22 | 1981-10-22 | Developing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5870256A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60130752A (en) * | 1983-12-19 | 1985-07-12 | Kyocera Corp | Dry developing method |
EP0198439A2 (en) * | 1985-04-17 | 1986-10-22 | Mita Industrial Co. Ltd. | Developing device |
JPH02212864A (en) * | 1989-02-13 | 1990-08-24 | Minolta Camera Co Ltd | Image forming device |
US5552870A (en) * | 1993-12-28 | 1996-09-03 | Ricoh Company, Ltd. | Developing device for an image forming apparatus |
US5991587A (en) * | 1995-10-31 | 1999-11-23 | Kyocera Corporation | Developing apparatus having developing roller which is loaded via an intermediate roller |
-
1981
- 1981-10-22 JP JP56169267A patent/JPS5870256A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60130752A (en) * | 1983-12-19 | 1985-07-12 | Kyocera Corp | Dry developing method |
EP0198439A2 (en) * | 1985-04-17 | 1986-10-22 | Mita Industrial Co. Ltd. | Developing device |
JPH02212864A (en) * | 1989-02-13 | 1990-08-24 | Minolta Camera Co Ltd | Image forming device |
US5552870A (en) * | 1993-12-28 | 1996-09-03 | Ricoh Company, Ltd. | Developing device for an image forming apparatus |
US5991587A (en) * | 1995-10-31 | 1999-11-23 | Kyocera Corporation | Developing apparatus having developing roller which is loaded via an intermediate roller |
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