JPH067288B2 - Image device - Google Patents
Image deviceInfo
- Publication number
- JPH067288B2 JPH067288B2 JP63195199A JP19519988A JPH067288B2 JP H067288 B2 JPH067288 B2 JP H067288B2 JP 63195199 A JP63195199 A JP 63195199A JP 19519988 A JP19519988 A JP 19519988A JP H067288 B2 JPH067288 B2 JP H067288B2
- Authority
- JP
- Japan
- Prior art keywords
- sleeve
- magnetic
- developer
- hopper
- toner
- 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
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
- G03G15/0942—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush with means for preventing toner scattering from the magnetic brush, e.g. magnetic seals
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Magnetic Brush Developing In Electrophotography (AREA)
- Dry Development In Electrophotography (AREA)
Description
【発明の詳細な説明】 本発明は、内側に磁界発生手段としての磁石を有し、こ
の磁石周りを回転駆動される非磁性スリーブ面に現像剤
ホッパ部で現像剤を供給して被現像部材たる潜像保持体
に対向する現像部へ担持搬送させて潜像保持体面の潜像
の現像を行なわせ、現像後の残留現像剤は回転スリーブ
面に引続き担持させて現像剤ホッパ部へ戻し搬入させる
方式の現像装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention has a magnet as a magnetic field generating means inside, and supplies a developer to a non-magnetic sleeve surface which is driven to rotate around the magnet by a developer hopper to develop a member to be developed. The latent image on the surface of the latent image carrier is developed by carrying and transporting it to the developing unit facing the barrel latent image carrier, and the residual developer after development is continuously carried on the rotary sleeve surface and returned to the developer hopper unit and carried in. The present invention relates to a developing device of the type.
上記のような方式の現像装置は既に知られており、実用
にも供されている。この種の現像装置について解決すべ
き問題点の１つとしてスリーブの現像剤ホッパ戻り口か
らの現像剤のもれ出し飛散が挙げられる。The developing device of the above type is already known and is put into practical use. One of the problems to be solved in this type of developing device is the leakage and scattering of the developer from the developer hopper return port of the sleeve.
即ち、現像部を通過したスリーブ部分がホッパ内の現像
剤供給域に向かって戻る戻り口部がスリーブの上昇回転
位置に位置する構成の現像装置においては、その戻り口
部位置の上方の現像剤が重力により戻り口部から下方に
漏出しやすい。That is, in the developing device having a structure in which the sleeve portion that has passed through the developing portion is returned to the developer supply area in the hopper, and the return opening portion is located at the upward rotation position of the sleeve, the developer above the return opening portion is located. Is apt to leak downward from the return port due to gravity.
本発明はこの現像剤もれ出し飛散を解決することを目的
とするもので、現像剤を担持して回転し現像部で潜像保
持体に付与して潜像を現像する非磁性スリーブと、この
非磁性スリーブ内に配置された磁石と、非磁性スリーブ
に現像剤を供給するホッパと、上記現像部に搬送する非
磁性スリーブ上の現像剤の厚みを規制する厚み規制部材
と、現像後スリーブがホッパ内の現像剤供給域に向って
戻るスリーブの上昇回転位置に於いてスリーブに対向
し、かつ磁石の磁界内に位置するようにホッパに設けら
れて、その上方の現像剤が下方にもれ出すのを防止する
磁界カーテンをスリーブとの間に形成する磁性部材と、
を有する現像装置、を要旨とする。An object of the present invention is to solve this developer leakage and scattering, and a non-magnetic sleeve for carrying a developer, rotating it, and imparting it to a latent image carrier at the developing section to develop a latent image, A magnet arranged in the non-magnetic sleeve, a hopper for supplying a developer to the non-magnetic sleeve, a thickness regulating member for regulating the thickness of the developer on the non-magnetic sleeve conveyed to the developing section, and a sleeve after development. Is provided in the hopper so as to face the sleeve in the ascending rotation position of the sleeve that returns toward the developer supply area in the hopper and to be located in the magnetic field of the magnet, and the developer above the hopper is also A magnetic member that forms a magnetic field curtain between the sleeve and the magnetic field curtain to prevent the magnetic field from flowing out;
And a developing device having.
以下第１図に示した具体的な実施例にもとずいて説明す
る。A description will be given below based on the specific embodiment shown in FIG.
磁界発生手段としての磁石ローラ１と、この磁石ローラ
を内部に有する非磁性スリーブ（以下スリーブと略称す
る）２とが、現像容器３内に取付けられている。この現
像容器３には上方に向って磁性トナー現像剤（以下トナ
ーと略称する）の収納ホッパ４が一体に形成されてお
り、上記現像容器３の開口部にはスリーブ上に付着した
トナーの塗布厚さを規制するブレード５が設けられてい
る。A magnet roller 1 as a magnetic field generating means and a non-magnetic sleeve (hereinafter abbreviated as sleeve) 2 having the magnet roller therein are mounted in a developing container 3. A hopper 4 for accommodating a magnetic toner developer (hereinafter abbreviated as toner) is integrally formed in the developing container 3 in an upward direction, and the toner attached to the sleeve is applied to the opening of the developing container 3. A blade 5 that regulates the thickness is provided.
磁石ローラ１は非回転の固定磁石であり、スリーブ２は
この固定磁石ローラ１の外周りを不図示の駆動手段機構
により矢示の反時計方向に回転駆動される。The magnet roller 1 is a non-rotating fixed magnet, and the sleeve 2 is rotationally driven around the outer circumference of the fixed magnet roller 1 in the counterclockwise direction indicated by an arrow by a driving means mechanism (not shown).
スリーブ２の回転駆動によりその表面にはトナー６が間
隙ｇとブレード５で規制されて例えば１００〜２００μ
程度の厚さに塗布される。このトナー６はスリーブ２の
回転によって潜像保持体としての画像形成体７との対向
位置（現像部）に搬送され、その位置においてスリーブ
２と画像形成体７との間に電界作用を受けてスリーブ２
から画像形成体７上へと間隙Ｇを飛翔し、画像形成体上
の静電潜像を現像する。現像後スリーブ２上に残留する
トナー６′はスリーブ２の引続く回転に伴ない後述する
磁性部材１０とスリーブ１２との間隙、及びひさし部材
１３とスリーブ２との間隙を通ってホッパ４内のトナー
供給域に戻って回収される。Due to the rotational driving of the sleeve 2, the toner 6 is regulated by the gap g and the blade 5 on the surface thereof, and the toner 6 is, for example, 100-200 μ
It is applied to the thickness of about. The toner 6 is conveyed by the rotation of the sleeve 2 to a position (developing section) facing the image forming body 7 as a latent image holding body, and at that position, an electric field action is applied between the sleeve 2 and the image forming body 7. Sleeve 2
To fly over the gap G onto the image forming body 7 to develop the electrostatic latent image on the image forming body. The toner 6 ′ remaining on the sleeve 2 after development passes through the gap between the magnetic member 10 and the sleeve 12 and the gap between the eaves member 13 and the sleeve 2 described later in the hopper 4 as the sleeve 2 continues to rotate. It returns to the toner supply area and is collected.
磁性部材１０は、現像後スリーブがホッパ４内の現像剤
供給域に向って戻るスリーブの上昇回転位置においてス
リーブ２に対してひさし状に張出して対向し、かつ磁石
ローラ１の磁界内に位置するようにホッパに設けられて
いる。The magnetic member 10 is located in the magnetic field of the magnet roller 1 so as to face the sleeve 2 in an eaves-like shape at the rising rotational position of the sleeve where the sleeve returns to the developer supply area in the hopper 4 after development. Is provided in the hopper.
磁石ローラ１は磁極配置を５極としてあり、磁性部材１
０に対応する磁石ローラ１の周面位置部分には磁極Ｓ3
を存在させてある。又トナー層厚規制ブレード５に対応
する磁石ローラ１の周面位置部分には磁極Ｎ1を存在さ
せてある。なお、本実施例装置では上記の両磁極Ｓ3と
Ｎ1間の磁石ローラ１の周面位置部分には磁極を存在さ
せていない。Ｓ1は現像磁極、Ｎ2・Ｓ2は搬送磁極であ
り、磁極Ｓ2は前記磁極Ｓ3よりもスリーブ回転方向上流
側にあり、磁極Ｓ3と同極である。The magnetic roller 1 has five magnetic poles, and the magnetic member 1
The magnetic pole S 3 is provided on the circumferential surface position portion of the magnet roller 1 corresponding to 0.
Is present. Further, a magnetic pole N 1 is made to exist at a peripheral surface position portion of the magnet roller 1 corresponding to the toner layer thickness regulating blade 5. In the apparatus of this embodiment, no magnetic pole is present in the peripheral surface position portion of the magnet roller 1 between the magnetic poles S 3 and N 1 . S 1 is the developing magnetic pole, N 2 · S 2 is the carrier pole, pole S 2 is in the sleeve rotation direction upstream side of the magnetic pole S 3, which is a magnetic pole S 3 homopolar.
而してこの磁極Ｓ2・Ｓ3からの磁界によってスリーブ２
から残留トナー６′を剥離させ、又磁性部材１０と磁極
Ｓ3の磁界によってスリーブ２と磁性部材１０との間に
磁界のカーテン１２が形成され、この磁界カーテン１２
によりホッパ４内のトナーのスリーブ２背後へのまわり
込みが防止される。即ちスリーブのトナーホッパ戻り口
からのトナーの下方もれ出し飛散が効果的に防止される
のである。The magnetic field from the magnetic poles S 2 and S 3 causes the sleeve 2
Residual toner 6 'is peeled off, also the magnetic field curtain 12 between the sleeve 2 and the magnetic member 10 is formed by the magnetic field of the magnetic member 10 and the magnetic pole S 3 from the magnetic field curtain 12
As a result, the toner in the hopper 4 is prevented from flowing around behind the sleeve 2. That is, it is possible to effectively prevent the toner from leaking out downward and scattering from the toner hopper return port of the sleeve.
尚、本実施例装置では上記磁性部材１０よりもスリーブ
回転方向下流側の位置にスリーブ２に向って張出す他の
ひさし状部材１３を設けてあり、このひさし部材１３の
存在によりホッパ内トナーの磁性部材１０上へのまわり
込みが防止される。In the apparatus of the present embodiment, another eave-shaped member 13 that projects toward the sleeve 2 is provided at a position downstream of the magnetic member 10 in the sleeve rotation direction. Due to the presence of the eave-shaped member 13, the toner in the hopper is prevented. It is possible to prevent the magnetic material 10 from wrapping around.
又ひさし状部材１３はホッパ４内のトナーをせき止める
と共に、スリーブ２に対するトナー供給域をブレード５
との間に画定する役目をしており、この部材１３とブレ
ード５との間領域即ちホッパ４のトナー供給域に対応す
る磁石ローラ１の周面範囲Ｒには磁極が存在しないから
この範囲Ｒ内ではトナー６をスリーブ表面に引付ける磁
気吸引力が全くないか、弱いのでホッパ内のトナーは実
質的にその重量により均一圧力でスリーブ表面に接触す
る。従ってスリーブ表面にはトナー重量が略均一にかか
る。又トナーは磁気吸引力によってスリーブ表面に強く
局部的に引付けられることがないため、スリーブ面及び
トナー同志の摩擦が少なく摩擦帯電電荷は必要以上には
ならない。その結果トナーは間隙ｇとブレード５で規制
されて、スリーブ２上に均一厚さにムラな塗布がされ
る。The eaves-shaped member 13 holds the toner in the hopper 4 and prevents the toner from being supplied to the sleeve 2 by the blade 5.
And a peripheral surface range R of the magnet roller 1 corresponding to the toner supply area of the hopper 4, that is, the area R between the member 13 and the blade 5, there is no magnetic pole. There is no or weak magnetic attraction to attract the toner 6 to the sleeve surface, so that the toner in the hopper comes into contact with the sleeve surface with a uniform pressure due to its weight. Therefore, the weight of the toner is evenly applied to the surface of the sleeve. Further, since the toner is not strongly attracted to the surface of the sleeve locally due to the magnetic attraction force, friction between the sleeve surface and the toner is small, and the triboelectric charge is not more than necessary. As a result, the toner is regulated by the gap g and the blade 5, and the toner is evenly applied to the sleeve 2 to have a uniform thickness.
第１図は本発明の現像装置の一実施例の構成略図であ
る。 １は磁石ローラ、２は非磁性スリーブ、４はトナーホッ
パ、６はトナー（現像剤）、１０は磁性部材、１２は磁
界カーテン。FIG. 1 is a schematic configuration diagram of an embodiment of the developing device of the present invention. 1 is a magnet roller, 2 is a non-magnetic sleeve, 4 is a toner hopper, 6 is toner (developer), 10 is a magnetic member, and 12 is a magnetic field curtain.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 井阪 和夫 東京都大田区下丸子３丁目30番２号 キヤ ノン株式会社内 (56)参考文献 特開 昭51−117051（ＪＰ，Ａ) 特開 昭54−50338（ＪＰ，Ａ) 特開 昭53−111738（ＪＰ，Ａ) 特開 昭54−65545（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuo Isaka 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (56) Reference JP-A-51-117051 (JP, A) JP-A-54 -50338 (JP, A) JP-A-53-111738 (JP, A) JP-A-54-65545 (JP, A)
Claims (1)
体に付与して潜像を現像する非磁性スリーブと、この非
磁性スリーブ内に配置された磁石と、非磁性スリーブに
現像剤を供給するホッパと、上記現像部に搬送する非磁
性スリーブ上の現像剤の厚みを規制する厚み規制部材
と、現像後スリーブがホッパ内の現像剤供給域に向って
戻るスリーブの上昇回転位置に於いてスリーブに対向
し、かつ磁石の磁界内に位置するようにホッパに設けら
れて、その上方の現像剤が下方にもれ出すのを防止する
磁界カーテンをスリーブとの間に形成する磁性部材と、
を有する現像装置。1. A non-magnetic sleeve for carrying a developer, rotating it, and applying it to a latent image holder at a developing section to develop a latent image, a magnet arranged in the non-magnetic sleeve, and a non-magnetic sleeve. A hopper that supplies the developer, a thickness regulating member that regulates the thickness of the developer on the non-magnetic sleeve that is conveyed to the developing section, and a rising rotation of the sleeve that the sleeve after development returns toward the developer supply area in the hopper. A magnetic field curtain is formed between the sleeve and the hopper so as to face the sleeve in the position and be positioned in the magnetic field of the magnet, and prevent the developer above the developer from leaking out downward. A magnetic member,
Developing device having.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63195199A JPH067288B2 (en) | 1988-08-04 | 1988-08-04 | Image device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63195199A JPH067288B2 (en) | 1988-08-04 | 1988-08-04 | Image device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6486184A JPS6486184A (en) | 1989-03-30 |
| JPH067288B2 true JPH067288B2 (en) | 1994-01-26 |
Family
ID=16337102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63195199A Expired - Lifetime JPH067288B2 (en) | 1988-08-04 | 1988-08-04 | Image device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH067288B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2736589B2 (en) * | 1993-02-02 | 1998-04-02 | 日本航空電子工業株式会社 | Contact and manufacturing method thereof |
| JP4717708B2 (en) * | 2006-04-28 | 2011-07-06 | 矢崎総業株式会社 | Connector terminal molding method and connector terminal |
| JP2010073449A (en) * | 2008-09-18 | 2010-04-02 | Japan Aviation Electronics Industry Ltd | Corrosion resistant contact, and connector |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5815791B2 (en) * | 1975-04-07 | 1983-03-28 | 株式会社ケイアイピ− | Denshi Fukushi Yakinio Kergen Zosouchi |
| JPS53111738A (en) * | 1977-03-11 | 1978-09-29 | Toshiba Corp | Developing device of magnetic brush type |
| JPS5450338A (en) * | 1977-09-29 | 1979-04-20 | Riken Dengu Seizo Kk | Magnetic developing apparatus for electrostatic photography |
| JPS5465545A (en) * | 1977-11-04 | 1979-05-26 | Fuji Xerox Co Ltd | Toner leakage preventer for developing unit of dry electrophotography duplicator |
-
1988
- 1988-08-04 JP JP63195199A patent/JPH067288B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6486184A (en) | 1989-03-30 |
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