JPS6235098Y2 - - Google Patents
Info
- Publication number
- JPS6235098Y2 JPS6235098Y2 JP17527280U JP17527280U JPS6235098Y2 JP S6235098 Y2 JPS6235098 Y2 JP S6235098Y2 JP 17527280 U JP17527280 U JP 17527280U JP 17527280 U JP17527280 U JP 17527280U JP S6235098 Y2 JPS6235098 Y2 JP S6235098Y2
- Authority
- JP
- Japan
- Prior art keywords
- toner
- sleeve
- developing sleeve
- developing
- developing device
- 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
- 230000005291 magnetic effect Effects 0.000 claims description 10
- 108091008695 photoreceptors Proteins 0.000 claims description 8
- 238000000034 method Methods 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-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
- 239000011230 binding agent Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Landscapes
- Magnetic Brush Developing In Electrophotography (AREA)
Description
【考案の詳細な説明】
本考案は絶縁性磁性トナーで現像スリーブ上に
磁気ブラシを形成し、導電性支持部材上に感光層
を有する感光体上に形成された静電潜像を現像す
る電子写真現像装置に関する。[Detailed description of the invention] This invention uses an insulating magnetic toner to form a magnetic brush on a developing sleeve, and develops an electrostatic latent image formed on a photoreceptor having a photosensitive layer on a conductive support member. The present invention relates to a photographic developing device.
絶縁性磁性トナーを用いた現像方法は、例えば
特開昭51−26046号公報に記載されている。この
現像方法による現像装置は、その構造を簡単にで
き、保守を容易にして普通紙上に鮮明な転写像を
得ることができる等、従来にない種々の利点を有
している。しかし、このような利点を有する反
面、トナーが摩擦帯電により現像に必要な大きさ
以上の電荷を持つに至り、それが原因でカブリ即
ち地汚れを生ずるという改良すべき欠点をも有し
ている。 A developing method using an insulating magnetic toner is described in, for example, Japanese Patent Laid-Open No. 51-26046. A developing device using this developing method has various advantages not found before, such as a simple structure, easy maintenance, and the ability to obtain clear transferred images on plain paper. However, while it has these advantages, it also has a drawback that should be improved: the toner becomes charged more than necessary for development due to frictional charging, which causes fogging, that is, scumming. .
本考案の目的は、上記装置の改良を成し、カブ
リが生じない電子写真装置を提供することにあ
る。この目的を達成するための本考案の基本的構
成は、現像スリーブと、該現像スリーブの周囲に
現像スリーブ上の磁気ブラシと接触する如く設け
られた部材とに、トナーの摩擦帯電により生ずる
極性と逆極性の直流電圧を、同電位となるように
印加したことを特徴とするものである。 SUMMARY OF THE INVENTION An object of the present invention is to provide an electrophotographic apparatus which is an improvement over the above-mentioned apparatus and which does not cause fogging. The basic structure of the present invention for achieving this purpose is that a developing sleeve and a member provided around the developing sleeve so as to be in contact with a magnetic brush on the developing sleeve have polarity generated by frictional electrification of toner. This is characterized in that DC voltages of opposite polarity are applied so that they have the same potential.
以下図面を用いながら本考案を詳細に説明す
る。 The present invention will be explained in detail below with reference to the drawings.
図は本考案に係る電子写真現像装置の一実施例
を示す構成図である。図において、１は現像剤と
しての絶縁性磁性トナー２を落下させるホツパ、
３は導電性で且つ非磁性の現像スリーブ、４はス
リーブ３と共にトナー溜りを形成する現像器後壁
である。絶縁性磁性トナー２は、キヤリア粒子を
含まないトナー粒子から成るもので、強磁性で且
つ絶縁性を有するものである。特に、比抵抗1014
Ωcm以上の高絶縁性であることが好ましい。５は
異極交互配列の静止磁石群で、スリーブ３の内側
に配置されている。６は現像器後壁４の下端に取
り付けられた穂立規制板で、この先端とスリーブ
３とで穂切板間隙７が形成される。８は導電性の
摩擦帯電用部材である。この摩擦帯電用部材８は
穂立規制板６の後段に配置されている。９は例え
ばアルミニウム製ドラム等の導電性支持部材で、
この上には例えば酸化亜鉛あるいは有機半導体の
如き電子写真用感光層が設けられ、感光体１０が
構成されている（図には導電性支持部材９及び感
光体１０の一部を図示した）。そして、感光体１
０とスリーブ３との間隙が現像間隙１１を成して
いる。尚、導電性支持部材９は接地されている。
１２は出力電圧が可変の直流電圧源で、その出力
電圧は、スリーブ３、穂立規制板６及び摩擦帯電
用部材８に印加されている。 The figure is a configuration diagram showing an embodiment of an electrophotographic developing device according to the present invention. In the figure, 1 is a hopper that drops insulating magnetic toner 2 as a developer;
3 is an electrically conductive and non-magnetic developing sleeve; 4 is a rear wall of the developing device forming a toner reservoir together with the sleeve 3; The insulating magnetic toner 2 is made of toner particles that do not contain carrier particles, and is ferromagnetic and has insulating properties. In particular, resistivity 10 14
It is preferable that the material has high insulation properties of Ωcm or more. Reference numeral 5 denotes a group of stationary magnets with different polarity alternately arranged, and is arranged inside the sleeve 3. Reference numeral 6 denotes a spike regulating plate attached to the lower end of the rear wall 4 of the developing device, and the tip of this plate and the sleeve 3 form a gap 7 between the spike cutting plates. 8 is a conductive frictional charging member. This frictional charging member 8 is disposed after the spike control plate 6 . 9 is a conductive support member such as an aluminum drum;
A photosensitive layer for electrophotography such as zinc oxide or an organic semiconductor is provided on this layer to constitute a photoreceptor 10 (the conductive support member 9 and a part of the photoreceptor 10 are shown in the figure). And photoreceptor 1
0 and the sleeve 3 constitutes a developing gap 11. Note that the conductive support member 9 is grounded.
Reference numeral 12 denotes a DC voltage source with a variable output voltage, and the output voltage is applied to the sleeve 3, the spike control plate 6, and the frictional charging member 8.
次にこのように構成された本考案装置の作動を
説明する。まず、ホツパ１からトナー２をスリー
ブ３と現像器後壁４とで形成するトナー溜りへ落
下させ、現像器内に収納する。ここで、スリーブ
３を時計方向に回転させると、トナー２は穂切板
間隙７を通して、スリーブ３の回転方向に移動
し、穂切板間隙７に対応した薄層としてスリーブ
３上に導き出される。更に、トナー２は磁石群５
の作用によつて穂立ちの状態を保持しながら移動
し、摩擦帯電用部材８の間隙を経て現像間隙１１
に到達する。この現像間隙１１にて主磁石５ａの
作用により毛羽立つた状態になつたトナー２は、
感光体１０に接触し、静電潜像の現像がなされ
る。尚、静電潜像の作成には公知の方法が用いら
れている。 Next, the operation of the device of the present invention constructed as described above will be explained. First, the toner 2 is dropped from the hopper 1 into a toner reservoir formed by the sleeve 3 and the rear wall 4 of the developing device, and is stored in the developing device. Here, when the sleeve 3 is rotated clockwise, the toner 2 moves in the direction of rotation of the sleeve 3 through the cutting plate gap 7, and is guided onto the sleeve 3 as a thin layer corresponding to the cutting plate gap 7. Furthermore, the toner 2 is transferred to the magnet group 5.
It moves while maintaining its standing state due to the action of
reach. The toner 2 that has become fluffy due to the action of the main magnet 5a in the development gap 11 is
It contacts the photoreceptor 10, and the electrostatic latent image is developed. Note that a known method is used to create the electrostatic latent image.
この構成の実施例装置においては、摩擦帯電に
よりトナー２が持つ電荷を、直流電圧源１２の出
力電圧を調整することによつて、一定の範囲内に
おさえることができる。したがつて、トナー２の
過度の帯電によるカブリは生じない。 In the apparatus of this embodiment having this configuration, the charge held by the toner 2 due to frictional charging can be suppressed within a certain range by adjusting the output voltage of the DC voltage source 12. Therefore, fogging due to excessive charging of the toner 2 does not occur.
カブリの発生原因となる必要以上の電荷をもつ
たトナーはその電荷極性が静電潜像の極性と逆極
性を有していた。本実施例においては、この必要
以上の電荷を現像スリーブ、穂立ち規制板または
摩擦帯電用部材に静電潜像の極性と同極性となる
ように電圧を印加し、制御することによりカブリ
の発生を防ぐことができた。印加される電圧は、
感光体が酸化亜鉛−樹脂バインダー分散タイプの
場合、約−20〜−300v程度で優れたカブリ防止
効果を示した。 Toner having an excessive charge that causes fogging has a charge polarity opposite to that of the electrostatic latent image. In this embodiment, this excess charge is controlled by applying a voltage to the developing sleeve, spike control plate, or frictional charging member so that the polarity is the same as that of the electrostatic latent image, thereby preventing fogging. could be prevented. The applied voltage is
When the photoreceptor was of the zinc oxide-resin binder dispersion type, excellent antifogging effects were exhibited at about -20 to -300V.
尚、上記実施例は、直流電圧源１２からの出力
電圧を、スリーブ３、穂立規制板６及び摩擦帯電
板８に印加する構成となつているが、本考案はこ
れに限定するものではない。又、摩擦帯電用部材
８は必ずしも必要ではない。 Although the above embodiment has a configuration in which the output voltage from the DC voltage source 12 is applied to the sleeve 3, the spike control plate 6, and the friction charging plate 8, the present invention is not limited to this. . Further, the frictional charging member 8 is not necessarily required.
以上説明したように、本考案においては、スリ
ーブ及びその周囲の部材に、トナーの摩擦帯電に
より生ずる極性と逆極性の直流電圧を、これらが
同電位となるように印加して、トナーが摩擦によ
つて得る帯電量を制御するため、カブリのない鮮
明な画像を得ることができる。 As explained above, in the present invention, a DC voltage of opposite polarity to that generated by frictional electrification of the toner is applied to the sleeve and the surrounding members so that they have the same potential, so that the toner is frictionally charged. Since the amount of charge obtained is controlled, clear images without fog can be obtained.
図は本考案に係る現像装置の一実施例を示す構
成図である。
１……ホツパ、２……トナー、３……スリー
ブ、５……磁石群、６……穂立規制板、８……摩
擦帯電用部材、９……導電性支持部材、１０……
感光体、１２……直流電圧源。
The figure is a configuration diagram showing an embodiment of a developing device according to the present invention. DESCRIPTION OF SYMBOLS 1... Hopper, 2... Toner, 3... Sleeve, 5... Magnet group, 6... Ear standing regulation plate, 8... Frictional charging member, 9... Conductive support member, 10...
Photoreceptor, 12...DC voltage source.
Claims (1)
気ブラシを形成し、導電性支持部材上に感光層を
有する感光体上に形成された静電潜像を現像する
電子写真現像装置において、前記現像スリーブ
と、該現像スリーブの周囲に現像スリーブ上の磁
気ブラシと接触する如く設けられた部材とに、前
記トナーの摩擦帯電により生ずる極性と逆極性の
直流電圧を、同電位となるように印加したことを
特徴とする電子写真現像装置。 In an electrophotographic developing device that uses insulating magnetic toner to develop an electrostatic latent image formed on a photoreceptor having a photosensitive layer on a conductive support member by forming a magnetic brush on a developing sleeve, the developing sleeve and a member provided around the developing sleeve so as to be in contact with the magnetic brush on the developing sleeve, applying a DC voltage of opposite polarity to that generated by the frictional charging of the toner so that the same potential is applied. An electrophotographic developing device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17527280U JPS6235098Y2 (en) | 1980-12-06 | 1980-12-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17527280U JPS6235098Y2 (en) | 1980-12-06 | 1980-12-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5798457U JPS5798457U (en) | 1982-06-17 |
| JPS6235098Y2 true JPS6235098Y2 (en) | 1987-09-07 |
Family
ID=29967571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17527280U Expired JPS6235098Y2 (en) | 1980-12-06 | 1980-12-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6235098Y2 (en) |
-
1980
- 1980-12-06 JP JP17527280U patent/JPS6235098Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5798457U (en) | 1982-06-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH03145664A (en) | Developing apparatus and development | |
| JPS5911105B2 (en) | Seiden Zou Nojiki Brush Gen Zouhou | |
| JPH0114587B2 (en) | ||
| JPS6235098Y2 (en) | ||
| US4657374A (en) | Development system for photoreceptor having surface potential and a large amount of charge | |
| JPH0451028B2 (en) | ||
| JPS6255147B2 (en) | ||
| JPS61273563A (en) | Electrostatic latent image developing device | |
| JPS5612672A (en) | Wet type developing device | |
| JPS58149076A (en) | Dry type developing device | |
| JPH0341827B2 (en) | ||
| JPS5948383B2 (en) | developing device | |
| JP2576688B2 (en) | One-component developing device | |
| JPH0121319Y2 (en) | ||
| JP3124322B2 (en) | Developing device | |
| JPS58176662A (en) | Developing device electrophotographic copying machine | |
| JP2946898B2 (en) | Electrophotographic charging device | |
| JPH01219871A (en) | Image forming device | |
| JPS5930268B2 (en) | Developing method of magnetic toner developing device | |
| JPS597972A (en) | Developing device | |
| JPH01169472A (en) | Developing device for electrophotographic device | |
| JPS6380269A (en) | Developing method | |
| JPS6137624B2 (en) | ||
| JPS5994771A (en) | Developing device of electrophotography | |
| JPH0462585B2 (en) |