JPS6127561A - Developing method of electrophotography - Google Patents
Developing method of electrophotographyInfo
- Publication number
- JPS6127561A JPS6127561A JP14746984A JP14746984A JPS6127561A JP S6127561 A JPS6127561 A JP S6127561A JP 14746984 A JP14746984 A JP 14746984A JP 14746984 A JP14746984 A JP 14746984A JP S6127561 A JPS6127561 A JP S6127561A
- Authority
- JP
- Japan
- Prior art keywords
- sleeve
- electrostatic image
- soft brush
- toner layer
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G13/00—Electrographic processes using a charge pattern
- G03G13/06—Developing
- G03G13/08—Developing using a solid developer, e.g. powder developer
- G03G13/09—Developing using a solid developer, e.g. powder developer using magnetic brush
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Magnetic Brush Developing In Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は固定の磁石ロールの周りを回転する円筒スリー
ブ上に一成分系磁性トナー層を附着形成し、この磁性ト
ナー層を同方向に移動する感光体などの静電像保持体に
接触させて静電像を可視化する電子写真の現像方法に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention involves forming a one-component magnetic toner layer on a cylindrical sleeve that rotates around a fixed magnet roll, and then applying an electrostatic charge to a photoreceptor or the like that moves in the same direction. The present invention relates to an electrophotographic developing method for visualizing an electrostatic image by bringing it into contact with an image carrier.
従来の上記したような現像方法では、現像ムラ、地汚鵡
、解像力の低下、トナーのスリーブへの固着などの欠点
があった。The conventional developing method described above has drawbacks such as uneven development, background smudges, decreased resolution, and toner sticking to the sleeve.
本発明は上記した従来の現像方法の欠点を取除いた簡単
で便利な電子写真の現像方法を提供することを目的とす
る。An object of the present invention is to provide a simple and convenient electrophotographic developing method that eliminates the drawbacks of the conventional developing methods described above.
本発明によれば、上記したような電子写真の現像方法に
おいて、前記スリーブを酌記靜電像保持体の表面移動速
度より約１．！１倍速い表面移動速度で同方向へ移動さ
せ、静電像保持体及びスリーブの・最も近接した現像位
置に対、向する磁石ロールの部分に１つの極性の磁石を
配設してその磁力線の作用により現像位置におけるスリ
ーブ上のトナー位置における間隙を、ソフトブラシ部の
無拘束最大膨出高さ及びトナー層の高さの間の範囲の長
さに設定してソフトブラシ部を静電像保持体に摺擦接触
させ、かつソフトブラシ部に、尖頭電圧約８００〜１５
００ｖ及び周波数約１〜３ｋ）Ｉ＆ノ交流電界を印加す
ることを特徴とする。According to the present invention, in the electrophotographic developing method as described above, the sleeve is moved approximately 1. ! The electrostatic image holder and sleeve are moved in the same direction at a surface movement speed that is 1 times faster, and a magnet of one polarity is disposed in the part of the magnet roll facing the closest developing position of the electrostatic image holder and sleeve. By this action, the gap at the toner position on the sleeve at the development position is set to a length in the range between the unrestrained maximum swelling height of the soft brush part and the height of the toner layer, and the soft brush part holds an electrostatic image. A peak voltage of approximately 800 to 15
It is characterized by applying an alternating current electric field of 00V and frequency of about 1 to 3K) I&N.
次に１本発明の実施例を図面を参照して説明する。Next, an embodiment of the present invention will be described with reference to the drawings.
図において、１は静電像保持体であυ、所定の周速度Ｖ
Ｄで矢印Ａの方向へ回転するようになっておシ１円筒状
ドラムの周面に適当な感光体が形成されており、この感
光体の表面に適当な静電像形成手段により静電像が形成
される。感光体及び静電像形成手段は例えば特公昭４６
−１１９５８号公報に記載されているものを用いること
ができる。In the figure, 1 is an electrostatic image holder υ, and a predetermined peripheral speed V
A suitable photoreceptor is formed on the circumferential surface of a cylindrical drum, and an electrostatic image is formed on the surface of this photoreceptor by an appropriate electrostatic image forming means. is formed. The photoreceptor and electrostatic image forming means are, for example,
Those described in Japanese Patent No.-11958 can be used.
静電像保持体１に近接して平行にかつ移動不能に磁石ロ
ール２が設けられておシ、磁石ロール２の周シには非磁
性の円筒スリーブ６が静電像保持体１の周速度ＶＤの約
１．３倍の周速度Ｖ、でそれと同方向（矢印Ｂ′の方向
）へ回転するように設けられている。磁石ロール２はス
リ・−プ５へのトナーの附着層の高さをほぼ一様な高さ
Ｈ，［規制する鉄製のブレード４に対向した位置にＳ極
を配しかつこのＳ極と直径方向反対側の位置に別のＳ極
を配し、史に静電像保持体に最も近接した位置部ち現像
位置にＮ極を配している。このだめ、Ｎ極からの磁力線
の作用により現像位置附近におけるスリーブ６上のトナ
ー層は半径方向外方へ膨出していわゆるソフトブラシ部
を形成する。このソフトブラシ部の無拘束時における最
大膨出高さをＨ２で図に示す。A magnet roll 2 is disposed immovably in parallel with the electrostatic image holder 1, and a non-magnetic cylindrical sleeve 6 is disposed around the magnet roll 2 to adjust the peripheral speed of the electrostatic image holder 1. It is provided to rotate in the same direction (direction of arrow B') at a circumferential speed V that is approximately 1.3 times VD. The magnetic roll 2 has an S pole located opposite to the regulating iron blade 4, and the height of the toner adhesion layer on the slip 5 is set to a substantially uniform height H. Another south pole is disposed at a position on the opposite side in the direction, and a north pole is disposed at a position historically closest to the electrostatic image holder, that is, at the development position. However, due to the action of the magnetic field lines from the N pole, the toner layer on the sleeve 6 in the vicinity of the development position bulges outward in the radial direction, forming a so-called soft brush portion. The maximum bulge height of this soft brush portion when not restrained is shown in the figure as H2.
静電像保持体１及びスリーブ５の間の最短距離即ち間隙
Ｇは上記したスリーブ３へのトナー附着層の高さＨｌ
より大きくかつ上記ソフトブラシ部の無拘束最大膨出高
さＨ２より小さい範囲の長さ即ち（Ｈｌ”１）の長さに
限定されている。従って、静電像保持体１の静電像保持
表面は１間隙Ｇにおいてスリーブｓ上から膨出したトナ
ー層の（Ｈｔ−Ｈ＋）の間の範囲のソフトブラシ部によ
って常に摺擦接触されている。The shortest distance, that is, the gap G between the electrostatic image holder 1 and the sleeve 5 is the height Hl of the toner adhesion layer to the sleeve 3 mentioned above.
The length is limited to a length within a range that is larger than the unrestricted maximum expansion height H2 of the soft brush portion, that is, the length (Hl"1). Therefore, the electrostatic image holding of the electrostatic image holding member 1 The surface is always in sliding contact with the soft brush portion in the range between (Ht-H+) of the toner layer bulging from above the sleeve s in one gap G.
更に、静電像保持体１と磁石ロール２との間に交流電源
５が連結されている。尚然に、磁石ロール２及びスリー
ブ５は静電像保持体１に対して電気的に絶縁保持されて
いる。Further, an AC power source 5 is connected between the electrostatic image holder 1 and the magnet roll 2. Of course, the magnet roll 2 and the sleeve 5 are held electrically insulated from the electrostatic image holder 1.
交流電源５は尖頭電圧約８ｏｏ〜１５００７゜周波数約
１〜５ ｋＨｚの交流電圧を発生し、それにより間隙Ｇ
における磁性トナーの膨出ソフトブラシ部に交流電界を
印加する。The AC power supply 5 generates an AC voltage with a peak voltage of approximately 800° to 15007° and a frequency of approximately 1 to 5 kHz, thereby reducing the gap G.
An alternating current electric field is applied to the bulging soft brush portion of the magnetic toner.
一例として、前記公報記載の装置を用いて静電像を円筒
ドラム状の静電像保持体１に形成した。As an example, an electrostatic image was formed on a cylindrical drum-shaped electrostatic image carrier 1 using the apparatus described in the above publication.
この作像時における静電像保持体１への一次直流電圧は
＋６０００Ｖ、二次直流電圧は−６０００Ｖであシ、静
電像の電位は暗部＋６００ Ｖ、明部十２００ｖであっ
た。During image formation, the primary DC voltage to the electrostatic image holder 1 was +6000 V, the secondary DC voltage was -6000 V, and the potential of the electrostatic image was +600 V in the dark area and 1200 V in the bright area.
この静電像を本発明方法に従うて現像した。現像条件は
、静電、像保持体１の周速度Ｖｏ ： １４７朋／ｓｅ
ｃ、 スリー フ５ （Ｄ周速度ｖｓ ： １ｑ ｏｚ
＠／Ｓｅｃ。This electrostatic image was developed according to the method of the present invention. The developing conditions were electrostatic, peripheral speed Vo of image carrier 1: 147 ho/se
c, sleeve 5 (D peripheral speed vs: 1q oz
@/Sec.
スリーブ３及びブレード４の間の間隙：２００μ、間隙
Ｇ：２００μ、現像用Ｎ極の磁束密度ニア５゜Ｇ（スリ
ーブ上）、Ｎ極の着極幅：５ｍ、磁性トナーの成分：ス
チレンアクリル６０重量％、磁性粉４０重量％、交流電
源：９００Ｖ（尖頭）、１２５０Ｈｚであツタ。Gap between sleeve 3 and blade 4: 200μ, Gap G: 200μ, Development N pole magnetic flux density near 5°G (on sleeve), N pole width: 5m, Magnetic toner component: Styrene acrylic 60 Weight%, magnetic powder 40% by weight, AC power supply: 900V (peak), ivy at 1250Hz.
この結果、現像されたトナー像の画質はバックグラウン
ドの汚れ：０．０６、画像濃度：１，４、解像カニ８本
以上であシ、良好な画像が得られた。As a result, the image quality of the developed toner image was as follows: background stain: 0.06, image density: 1.4, resolution: 8 or more crabs, and a good image was obtained.
また、この例において現像条件をいろいろ変化させて実
験してみた。その結果、ｖｓ＜ＶＤの場合及びｖｓ〉１
．３ＶＤの場合では画像濃度が低くなると共に画像のソ
リッド部においてその先端側及び後端側の間に濃度差が
生じ、またｖｓ＝ＶＤの場合にはスリーブ上のトナー層
のムラにより生じる画像濃度ムラが顕著に現われた。ま
た、間隙ＧをＨ８より小さくすると、トナー粒子がスリ
ーブ上に固着する現象が生じた。更に、交流電源５の尖
頭電圧が８００ｖ以下であると、画像にニジミが生じて
解像力が低下し、１５００Ｖ以上であると１画像に水玉
模様のムラが発生した。また、電源５０交流周波数が１
ｋＨｚ以下であると、地汚れや濃度ムラが生じた。In this example, we also experimented with various developing conditions. As a result, if vs<VD and vs>1
．． In the case of 3VD, the image density becomes lower and a density difference occurs between the leading edge and trailing edge of the solid part of the image, and in the case of vs=VD, image density unevenness occurs due to unevenness of the toner layer on the sleeve. was evident. Further, when the gap G was made smaller than H8, a phenomenon occurred in which the toner particles were stuck on the sleeve. Further, when the peak voltage of the AC power source 5 was 800 V or less, blurring occurred in the image and the resolution decreased, and when it was 1500 V or more, polka-dot unevenness occurred in one image. Also, the power supply 50 AC frequency is 1
When the frequency was below kHz, background stains and density unevenness occurred.
図は本発明による現像方法を実施する装置の一例の要部
の概略側面図である。
１〜・・・静電像保持体、 ２・・・磁石ロール、５・
・・円筒スリーブ、 ４・・・ブレード、５・・・交
流電源。
Ｃ１０The figure is a schematic side view of essential parts of an example of an apparatus for carrying out the developing method according to the present invention. 1-... Electrostatic image carrier, 2... Magnet roll, 5...
...Cylindrical sleeve, 4...Blade, 5...AC power supply. C10
Claims (1)
成分系磁性トナー層を附着形成し、この磁性トナー層を
同方向に移動する静電像保持体に接触させて静電像を可
視化する電子写真の現像方法において、前記スリーブを
前記静電像保持体の表面移動速度より約１．３倍速い表
面移動速度で同方向へ移動させ、静電像保持体及びスリ
ーブの最も近接した現像位置に対向する磁石ロールの部
分に１つの極性の磁石を配設してその磁力線の作用によ
り現像位置におけるスリーブ上のトナー層を半径方向外
方へ膨出させ、それによりソフトブラシ部を形成し、静
電像保持体及びスリーブの間の現像位置における間隙を
、前記ソフトブラシ部の無拘束最大膨出高さ及び前記ト
ナー層の高さの間の範囲の長さに設定してソフトブラシ
部を静電像保持体に摺擦接触させ、かつ前記ソフトブラ
シ部に、尖頭電圧約８００〜１５００Ｖ及び周波数約１
〜３ｋＨｚの交流電界を印加することを特徴とする電子
写真の現像方法。A one-component magnetic toner layer is deposited on a cylindrical sleeve that rotates around a fixed magnet roll, and this magnetic toner layer is brought into contact with an electrostatic image carrier moving in the same direction to visualize an electrostatic image. In a photographic developing method, the sleeve is moved in the same direction at a surface movement speed approximately 1.3 times faster than the surface movement speed of the electrostatic image holder, and is brought to a developing position closest to the electrostatic image holder and the sleeve. A magnet of one polarity is disposed on the opposing magnet rolls, and the toner layer on the sleeve at the development position bulges outward in the radial direction by the action of the magnetic field lines, thereby forming a soft brush part and forming a static brush. The gap between the image holder and the sleeve at the developing position is set to a length in the range between the unrestrained maximum expansion height of the soft brush portion and the height of the toner layer, and the soft brush portion is kept static. A peak voltage of about 800 to 1500 V and a frequency of about 1 are applied to the soft brush portion, which is brought into sliding contact with the image holder.
An electrophotographic developing method characterized by applying an alternating current electric field of ~3 kHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14746984A JPS6127561A (en) | 1984-07-18 | 1984-07-18 | Developing method of electrophotography |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14746984A JPS6127561A (en) | 1984-07-18 | 1984-07-18 | Developing method of electrophotography |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6127561A true JPS6127561A (en) | 1986-02-07 |
| JPH0528380B2 JPH0528380B2 (en) | 1993-04-26 |
Family
ID=15431085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14746984A Granted JPS6127561A (en) | 1984-07-18 | 1984-07-18 | Developing method of electrophotography |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6127561A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63286873A (en) * | 1987-05-19 | 1988-11-24 | Fuji Xerox Co Ltd | Developing device for image forming device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5532059A (en) * | 1978-08-29 | 1980-03-06 | Canon Inc | Method and apparatus for electrophotographic developing |
| JPS5662275A (en) * | 1979-10-25 | 1981-05-28 | Canon Inc | Developing method |
| JPS56154770A (en) * | 1980-05-02 | 1981-11-30 | Canon Inc | Developing device using one-component magnetic toner |
-
1984
- 1984-07-18 JP JP14746984A patent/JPS6127561A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5532059A (en) * | 1978-08-29 | 1980-03-06 | Canon Inc | Method and apparatus for electrophotographic developing |
| JPS5662275A (en) * | 1979-10-25 | 1981-05-28 | Canon Inc | Developing method |
| JPS56154770A (en) * | 1980-05-02 | 1981-11-30 | Canon Inc | Developing device using one-component magnetic toner |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63286873A (en) * | 1987-05-19 | 1988-11-24 | Fuji Xerox Co Ltd | Developing device for image forming device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0528380B2 (en) | 1993-04-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |