JPS60256170A - Magnetic brush developing device for electrophotography - Google Patents
Magnetic brush developing device for electrophotographyInfo
- Publication number
- JPS60256170A JPS60256170A JP11238484A JP11238484A JPS60256170A JP S60256170 A JPS60256170 A JP S60256170A JP 11238484 A JP11238484 A JP 11238484A JP 11238484 A JP11238484 A JP 11238484A JP S60256170 A JPS60256170 A JP S60256170A
- Authority
- JP
- Japan
- Prior art keywords
- developer
- rotary sleeve
- sleeve
- magnetic brush
- rotating sleeve
- 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
- G03G15/0921—Details concerning the magnetic brush roller structure, e.g. magnet configuration
- G03G15/0928—Details concerning the magnetic brush roller structure, e.g. magnet configuration relating to the shell, e.g. structure, composition
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Magnetic Brush Developing In Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
（発明の分野）
本発明は電子写真の磁気プツシ現ｆｊ： ＨｆＦｊ 、
＋３に詳細には磁気［］−ルの外周に回転スリーブを
（１してなり、回転スリーブにＪ、り現像剤をスリーブ
周方向、軸方向双方に搬送できるＪ、うにした磁気ブラ
シ現像装置に′ＰＡづる−しのである。DETAILED DESCRIPTION OF THE INVENTION (Field of the Invention) The present invention relates to an electrophotographic magnetic press fj: HfFj,
+3 In detail, a rotating sleeve is attached to the outer circumference of the magnetic brush (1), and the rotating sleeve is capable of conveying developer both in the circumferential direction of the sleeve and in the axial direction. 'PA Zuru Shino.
（従来の技術）
電子写真法において、電子′ｑ貞感光体人面に形成され
た静電ＩＩｌ像をトナー像に現＠りるｌ、ｊ像装防の一
つとして、各種磁気ブラシ現像装置が広く実用に供され
ている。イしくこのｌｌ１ｉ気ブシシ現＠装置の一例と
して、磁気ロール（マグ［コール）の外周に回転スリー
ブを有し、磁気口−ルにより吸引した現像剤を、回転ス
リーブの周面により感光体表面に沿って搬送づるように
した磁気ブラシ現像装置が公知となっている。(Prior Art) In electrophotography, various magnetic brush developing devices are used to develop an electrostatic image formed on a photoreceptor's face into a toner image. is widely put into practical use. As an example of this Ill1i air development @ device, there is a rotating sleeve on the outer periphery of a magnetic roll (magic roll), and the developer attracted by the magnetic nozzle is transferred to the surface of the photoconductor using the circumferential surface of the rotating sleeve. Magnetic brush development devices are known which are conveyed along a magnetic brush.
上記のような回転スリーブを備える磁気ブラシ現像装置
において、回転スリーブによる現像剤搬送作用を高める
ため、該回転スリーブの周面にスリーブ軸方向に延びる
細溝を設けた磁気ブラシ現像装置も知られている。すな
わち上記のような細溝を設けてａ３けば、現像剤がこの
細溝に捕捉されて回転スリーブ周面に対してスリップし
難くなり、スリーブ周方向の現像剤１ｌＩ２送効果が高
められる。In a magnetic brush developing device equipped with a rotating sleeve as described above, a magnetic brush developing device is also known in which a narrow groove extending in the axial direction of the sleeve is provided on the circumferential surface of the rotating sleeve in order to enhance the developer conveyance effect by the rotating sleeve. There is. That is, by providing the above-mentioned narrow grooves a3, the developer is captured by the narrow grooves and becomes difficult to slip against the circumferential surface of the rotating sleeve, thereby increasing the effect of conveying the developer 1lI2 in the circumferential direction of the sleeve.
しかし上述のようにスリーブ周方向の現像剤搬送作用の
みを高めると、感光体上の１ヘナー像においてスリーブ
の接線方向の（スリーブ軸と直角な）線が濃く現像され
、スリーブ軸と平行な方向の線は薄くあるいは細く現像
されるという不具合が生じる。However, as mentioned above, if only the developer transport effect in the circumferential direction of the sleeve is enhanced, in one henna image on the photoreceptor, the line in the tangential direction of the sleeve (perpendicular to the sleeve axis) is developed darkly, and the line parallel to the sleeve axis is developed darkly. A problem arises in that the lines are developed to be thin or thin.
（発明が解決しようとする問題点）
そこで本発明は、上記のような問題点を解決し、現像剤
を回転スリーブの周方向、軸方向双方に効率良く搬送で
きるようにした磁気ブラシ現１ｇ！装置を提供すること
を目的とするものである。(Problems to be Solved by the Invention) Therefore, the present invention solves the above-mentioned problems and provides a magnetic brush that can efficiently convey the developer in both the circumferential direction and the axial direction of the rotating sleeve! The purpose is to provide a device.
（問題点を解決するための手段）
本発明の電子写真の磁気ブラシ現像装置は、前記のよう
に磁気ロールの外周に回転スリーブを有してなる磁気ブ
ラシ現像装置において、１記回転スリーブの周面の略全
面に負って、スパイラル状の細溝を設けたことを特徴ど
するものて゛ある。(Means for Solving the Problems) A magnetic brush developing device for electrophotography according to the present invention includes a magnetic brush developing device having a rotating sleeve on the outer periphery of the magnetic roll as described above. Some are characterized by having narrow spiral grooves over almost the entire surface.
（作 用）
回転スリーブの周面に上記のようなスパイラル状の細溝
を設けておくと、前述のスリーブ軸方向に延びる細溝が
設けられた場合と同様にスリーブ周方向の現像剤搬送効
果が高められるが、細溝がスリーブ軸方向に対して斜め
になっているので、回転スリーブを介して磁気ロールに
吸引されている現像剤は該回転スリーブに対して若干ス
リップづる。現像剤が回転スリーブに対してスリップづ
ると、この現像剤は上記細溝に案内されてスリーブ軸方
向に移動するようになる。(Function) When a spiral groove as described above is provided on the circumferential surface of the rotating sleeve, the developer conveying effect in the circumferential direction of the sleeve is achieved in the same manner as when the narrow groove extending in the axial direction of the sleeve is provided. However, since the narrow grooves are oblique to the axial direction of the sleeve, the developer attracted to the magnetic roll via the rotating sleeve slips slightly with respect to the rotating sleeve. When the developer slips against the rotating sleeve, the developer is guided by the narrow groove and moves in the axial direction of the sleeve.
（実施例）
以下、図面に示す実施例に基づいて本発明の詳細な説明
Ｊる。(Example) Hereinafter, the present invention will be described in detail based on the example shown in the drawings.
第１図、第２図は本発明の一実施例にＪ、る電子写真の
磁気ブラシ現像装置を示７１ ｂのぐある。磁気ブラシ
現像装置１０はハウジング１内に、円（１状の磁気ロー
ル２と、この磁気［１−ル２の外周に回３−
転自在に配された回転スリーブ３と、１へリマ−４と、
現像剤撹拌オーガー５．５とを備えている。FIGS. 1 and 2 show an electrophotographic magnetic brush developing device according to an embodiment of the present invention. The magnetic brush developing device 10 includes a circular magnetic roll 2, a rotary sleeve 3 rotatably disposed around the outer periphery of the magnetic roll 2, and a helical roller 4 in a housing 1. and,
Equipped with developer stirring auger 5.5.
第２図に示されるようにこの磁気ブラシ現像装置１０は
、上記回転スリーブ３が、−例としてドラム状の電子写
真感光体２０の表面２１に近接して対向するように配さ
れる。ハウジング１内に溜められた現像剤１１はトリマ
ー４によってトリミングされ、磁気［１−ル２に磁力で
吸引されて回転スリー１３０周面３ａ−トに保持される
。矢印へ方向に回転される電子写真感光体２０に対して
、回転スリーブ３が図示しない回転駆動手段にＪ：り矢
印Ｂ方向に回転されると、該回転スリーブ３の周面３ａ
に保持されている現像剤１１が電子７ｆ真感光体２０の
表面２１の静電潜像に静電引力で付着し、静電潜像が該
現像剤１１によって現像される。As shown in FIG. 2, the magnetic brush developing device 10 is arranged such that the rotating sleeve 3 is located close to and facing the surface 21 of, for example, a drum-shaped electrophotographic photoreceptor 20. As shown in FIG. The developer 11 stored in the housing 1 is trimmed by the trimmer 4, and is magnetically attracted by the magnetic roller 2 and held on the circumferential surface 3a of the rotating sleeve 130. When the rotary sleeve 3 is rotated in the direction of the arrow B by a rotation driving means (not shown) with respect to the electrophotographic photoreceptor 20 rotated in the direction of the arrow, the circumferential surface 3a of the rotary sleeve 3
The developer 11 held on the photoreceptor 20 adheres to the electrostatic latent image on the surface 21 of the photoreceptor 20 by electrostatic attraction, and the electrostatic latent image is developed by the developer 11.
ここで第１図に示されるように−に配回転スリーブ３の
周面３ａには、スパイラル状の劃１２が該周面３ ｒ］
の全面に百って設（）られている。したがって前記のよ
うにして該回転スリーブ３の周面３Ｆ１に保持された現
像剤１１は（第１図においては分４−
かりやＪく穂ｉｔを拡大図示しである）、このａｌｌ満
１２に捕捉されて、回転スリーブ３ととｂにその周方向
（第１図のＹ方向）に搬送される。しかじ細溝１２は回
転スリーブ３の軸に対して傾いているので、磁気ロール
２に吸引されて留まろうとする現像剤１１は回転スリー
ブ３に対しである程度スリップし、この細溝１２に案内
され−Ｃ回転スリーブ３の軸方向（第１図のＹ方向）に
も移動覆る。したがって結局現像剤１１は第１図にＺぐ
示づ−ように、回転スリーブ３の周面３ａ十を斜めにｗ
Ｊ送されるＪ−うになる。Here, as shown in FIG. 1, a spiral groove 12 is formed on the circumferential surface 3a of the rotatable sleeve 3.
The number 100 () is placed on the entire surface. Therefore, the developer 11 held on the circumferential surface 3F1 of the rotary sleeve 3 as described above (in FIG. 1, the 4th part is shown in an enlarged view) is distributed over all 12 parts. It is captured and conveyed to the rotating sleeves 3 and b in the circumferential direction (Y direction in FIG. 1). However, since the narrow groove 12 is inclined with respect to the axis of the rotating sleeve 3, the developer 11, which is attracted to the magnetic roll 2 and tries to stay there, slips to some extent with respect to the rotating sleeve 3 and is guided into the narrow groove 12. It also moves in the axial direction of the rotating sleeve 3 (Y direction in FIG. 1). Therefore, as shown in FIG.
J-to be sent.
上記のように現像剤１１が回転スリーブ３の周方向およ
び軸方向の双方に搬送されれば、前記静電潜像の横線と
縦線（すなわら回転スリーブ３の軸方向の線と、この線
に直角な方向の線）がともに十分な濃度で現像されるよ
うになる。ハウジング１内貯蔵されている現像剤１１も
、回転スリーブ３の作用で該回転スリーブ３の軸方向に
移動づるようになり、新しい現像剤１１と古い現像剤１
１との撹拌効果が高められる。If the developer 11 is conveyed in both the circumferential direction and the axial direction of the rotary sleeve 3 as described above, the horizontal and vertical lines of the electrostatic latent image (i.e., the axial line of the rotary sleeve 3 and the (lines in the direction perpendicular to the lines) are both developed with sufficient density. The developer 11 stored in the housing 1 also moves in the axial direction of the rotary sleeve 3 due to the action of the rotary sleeve 3, and new developer 11 and old developer 1 are separated.
The stirring effect with 1 is enhanced.
なお上記スパイラル状の４１２は、回転スリーブ３の周
方向、軸方向双方にバランス良く現像剤１１を搬送する
ためには、顛き４５°前後に設定するのが好ましい。Note that, in order to convey the developer 11 in a well-balanced manner both in the circumferential direction and the axial direction of the rotary sleeve 3, the spiral shape 412 is preferably set at an angle of about 45 degrees.
（発明の効果）
以上詳細に＄１明した通り本発明の電子写真のｕｌ磁気
ブラシ現像装置よれば、現像剤を磁気［１−ルの周方向
、軸方向双方に搬送して静電潜像を現像することが可能
になり、したがって現像して（ηられる＝］ピー等の電
子写真画像は、特定の方向に淵痘の偏りが無い高画質の
ものとなる。さらに本発明の磁気ブラシ現像装置によれ
ば、現像剤の撹拌効果も＾められるので、濃度ムラの無
い電子写真画像が得られるようになる。(Effects of the Invention) As described in detail above, according to the electrophotographic UL magnetic brush developing device of the present invention, the developer is conveyed in both the circumferential direction and the axial direction of the electrostatic latent image. Therefore, the developed electrophotographic images such as (η=]P) will be of high quality without any bias in a particular direction.Furthermore, the magnetic brush development of the present invention According to the apparatus, since the stirring effect of the developer can be improved, an electrophotographic image without density unevenness can be obtained.
第１図および第２図はそれぞれ、本発明の磁気ブラシ現
像装置の一実施例を示す一部破断斜視図、側断面図であ
る。
２・・・磁気ロール ３・・・回転スリーブ３ａ・・・
回転スリーブの周面
１０・・・磁気ブラシ現像装ｄ
１１・・・現像剤 １２・・・細溝FIG. 1 and FIG. 2 are a partially cutaway perspective view and a side sectional view, respectively, showing an embodiment of the magnetic brush developing device of the present invention. 2...Magnetic roll 3...Rotating sleeve 3a...
Circumferential surface of rotating sleeve 10... Magnetic brush developing device d 11... Developer 12... Thin groove
Claims (1)
ルにより吸引した現像剤を前記回転スリーブの周面によ
り、電子写真感光体の表面に沿って搬送して、該感光体
に形成された静電潜像を現像する電子写真の磁気ブラシ
現像装置において、前記回転スリーブの周面の略全面に
亘ってスパイラル状の細溝が設置ノられたことを特徴と
１６電子写真の磁気ブラシ現像Ｖ装置。A rotating sleeve is provided on the outer periphery of the magnetic roll, and the developer attracted by the magnetic roll is conveyed along the surface of the electrophotographic photoreceptor by the circumferential surface of the rotating sleeve, and the electrostatic charge formed on the photoreceptor is removed. 16. A magnetic brush developing device for electrophotography for developing a latent image, characterized in that a spiral narrow groove is installed over substantially the entire circumferential surface of the rotating sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11238484A JPS60256170A (en) | 1984-06-01 | 1984-06-01 | Magnetic brush developing device for electrophotography |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11238484A JPS60256170A (en) | 1984-06-01 | 1984-06-01 | Magnetic brush developing device for electrophotography |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60256170A true JPS60256170A (en) | 1985-12-17 |
Family
ID=14585325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11238484A Pending JPS60256170A (en) | 1984-06-01 | 1984-06-01 | Magnetic brush developing device for electrophotography |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60256170A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012058281A (en) * | 2010-09-03 | 2012-03-22 | Ricoh Co Ltd | Developing device, process cartridge and image forming apparatus |
| US8208840B2 (en) | 2008-03-10 | 2012-06-26 | Ricoh Company, Ltd. | Developer carrier, developing device, image forming apparatus, process cartridge, and image forming method |
-
1984
- 1984-06-01 JP JP11238484A patent/JPS60256170A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8208840B2 (en) | 2008-03-10 | 2012-06-26 | Ricoh Company, Ltd. | Developer carrier, developing device, image forming apparatus, process cartridge, and image forming method |
| JP2012058281A (en) * | 2010-09-03 | 2012-03-22 | Ricoh Co Ltd | Developing device, process cartridge and image forming apparatus |
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