JP3146788B2 - Brush charging device - Google Patents

Brush charging device

Info

Publication number
JP3146788B2
JP3146788B2 JP24189393A JP24189393A JP3146788B2 JP 3146788 B2 JP3146788 B2 JP 3146788B2 JP 24189393 A JP24189393 A JP 24189393A JP 24189393 A JP24189393 A JP 24189393A JP 3146788 B2 JP3146788 B2 JP 3146788B2
Authority
JP
Japan
Prior art keywords
brush
voltage
charging device
charging
charged
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 - Fee Related
Application number
JP24189393A
Other languages
Japanese (ja)
Other versions
JPH0798534A (en
Inventor
真文 柏原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP24189393A priority Critical patent/JP3146788B2/en
Priority to US08/291,883 priority patent/US5479244A/en
Publication of JPH0798534A publication Critical patent/JPH0798534A/en
Application granted granted Critical
Publication of JP3146788B2 publication Critical patent/JP3146788B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明はブラシ帯電装置、特に電
子写真プロセスを用いたプリンタやファクシミリ、複写
機等の画像形成装置のブラシ帯電装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brush charging device, and more particularly to a brush charging device for an image forming apparatus such as a printer, a facsimile or a copying machine using an electrophotographic process.

【0002】[0002]

【従来の技術】従来、この種の電子写真プロセスに用い
られるプロセスカートリッジにおいては、感光体等の像
担持体面の帯電を行う方法としてコロナ放電装置が広く
利用されている。コロナ放電装置は像担持体面を均一
に、かつ所定の電位に帯電を行う方法としては有効であ
る。しかし、コロナ放電を利用していることにより発生
するオゾンの問題がある。このコロナ帯電装置に対し
て、オゾンの発生を押さえることが可能な帯電部材を被
帯電体に接触させて帯電を行うブラシ帯電装置、ローラ
帯電装置等の接触帯電装置が有る。ブラシ帯電装置は絶
縁性基板とその上に電圧を印加する導電層、さらに低抵
抗の毛ブラシ繊維からなる多層構成をとり、ブラシをロ
ーラ状にしたブラシローラを回転して使うものと、平板
状のブラシを固定して使うものとがある。
2. Description of the Related Art Heretofore, in a process cartridge used in this type of electrophotographic process, a corona discharge device has been widely used as a method for charging an image carrier surface such as a photosensitive member. The corona discharge device is effective as a method for uniformly charging the surface of the image carrier to a predetermined potential. However, there is a problem of ozone generated by using corona discharge. For this corona charging device, there are contact charging devices such as a brush charging device and a roller charging device which perform charging by bringing a charging member capable of suppressing generation of ozone into contact with a member to be charged. The brush charging device has a multi-layer structure consisting of an insulating substrate, a conductive layer for applying a voltage on it, and a low-resistance bristle brush fiber. Some brushes are fixed and used.

【0003】[0003]

【発明が解決しようとする課題】上述した従来のブラシ
帯電装置においては、直流電圧のみ印加しており、低温
低湿ではブラシの抵抗が高くなり、帯電電位が低くな
り、逆に高温高湿ではブラシの抵抗が低くなり帯電電位
が高くなり、環境により帯電電位の変動が大きいという
問題がある。また、特に低温低湿下ではストリーマ放電
を起こし、全面網点印字に白斑点が生じる問題もある。
さらにまた、感光体に接触しているため、感光体上のト
ナー、及び感光体の削れ粉が蓄積されること、感光体の
回転によりブラシの毛が回転方向の下流側へ次第に倒れ
ること等により帯電電位が低下したり、感光体の回転に
よりブラシの毛が抜けたり、飛び出したりすることによ
り、その毛が現像器やクリーナに入って悪影響を与えた
り、露光を遮り印字画像がその部分だけ白く抜ける現象
が生じるという問題点もある。なおまた、低抵抗の毛ブ
ラシからなるブラシ帯電装置により被帯電体である感光
体を帯電するとき、感光体にピンホールや打痕による傷
があると、そこに大電流が流れ込み、火花放電が発生す
る。その結果、電圧降下が生じることにより、ピンホー
ルや傷がブラシを通過するまで帯電不良を起こすとか、
ピンホールや傷が触れたブラシは火花放電により溶融す
るという欠点がある。
In the above-described conventional brush charging device, only a DC voltage is applied. At low temperatures and low humidity, the resistance of the brush increases, and the charging potential decreases. And the charging potential increases, and the charging potential varies greatly depending on the environment. In addition, there is also a problem that streamer discharge is caused particularly under low temperature and low humidity, and white spots are generated on the entire halftone dot printing.
Furthermore, since the toner is in contact with the photoreceptor, the toner on the photoreceptor and shavings of the photoreceptor are accumulated, and the rotation of the photoreceptor causes the bristles of the brush to gradually fall to the downstream side in the rotation direction. If the charged potential drops, or the brush hairs come off or fly out due to the rotation of the photoreceptor, the hairs may enter the developing unit or cleaner and have an adverse effect, or the exposure may be interrupted and the printed image may become whiter at that part. There is also a problem that a phenomenon of falling off occurs. In addition, when the photoreceptor to be charged is charged by a brush charging device composed of a low-resistance bristle brush, if the photoreceptor is damaged by pinholes or dents, a large current flows into the photoreceptor and spark discharge occurs. appear. As a result, due to the voltage drop, poor charging may occur until pinholes and scratches pass through the brush,
A brush touched by a pinhole or a scratch has a disadvantage that it is melted by spark discharge.

【0004】[0004]

【課題を解決するための手段】本発明のブラシ帯電装置
は、電子写真プロセスに用いる被帯電体に電圧を印加し
た帯電部材を接触して被帯電体を帯電させるブラシ帯電
装置において、印加する電圧が直流電圧に交流電圧を重
畳した重畳電圧であり、導電性を有するステンレス材か
ら成るプレート上に保持されアクリル繊維からなる帯電
部材であるブラシと、帯電部材であるブラシの下流側に
ABS樹脂から成るブラシ倒れ防止のガードと、ブラシ
から被帯電体の回転により抜けたり飛び出すブラシの繊
維を取り除くためのブラシの繊維長より長く被帯電体幅
を有するPETフィルムまたはウレタンシートから成る
フィルムとを備える。
SUMMARY OF THE INVENTION A brush charging device according to the present invention applies a voltage to a member to be charged used in an electrophotographic process.
Brush to charge the charged object by contacting the charged member
In the equipment, the applied voltage overlaps the DC voltage with the AC voltage.
It is a superimposed voltage that is folded and is a stainless steel material with conductivity
Made of acrylic fiber held on a plate made of
On the downstream side of the brush which is the member and the brush which is the charging member
Brush fall prevention guard made of ABS resin and brush
The brush fibers that come off or fly out of the
Charged object width longer than the fiber length of the brush for removing fibers
Consisting of PET film or urethane sheet having
And a film.

【0005】[0005]

【0006】[0006]

【0007】[0007]

【実施例】次に、本発明について図面を参照して説明す
る。
Next, the present invention will be described with reference to the drawings.

【0008】図1は本発明の第1の実施例による電子写
真カートリッジの縦断面図である。図1の電子写真カー
トリッジは半導電性繊維から成るブラシ帯電装置1に直
流電圧と交流電圧との重畳電圧を印加して、静電潜像担
持体として従来から使用されているOPC、またはSe
系等の感光体3を一様に帯電させ、感光体3の表面に初
期電位を与えるものである。感光体3はその後、図示さ
れていないレーザ、LED、または液晶等の光源から、
画像データの露光2を施して、静電潜像を形成する。ト
ナー7は、攪拌部材8により、導電性ないしは絶縁性の
スポンジ、アルミ等の材料から成る供給ローラ5に導か
れ、シリコンゴム、ウレタンゴム、ニトリルブチレンゴ
ム、天然ゴム、またはスポンジの表面処理を施した部材
などのような可撓性材料から成るトナー担持体4に導か
れる。トナー担持体4に導かれたトナー7は、ステンレ
ス、リン青銅、または洋白等の金属のバネ材から成る規
制ブレード6によって規制されて、均一な薄層に形成さ
れると共に、摩擦によって帯電される。トナー担持体4
上に帯電した薄層のトナー7は、感光体3に対向したと
きに、電界によって感光体3上の静電潜像に付着し、現
像が行われる。次に感光体3上のトナー画像を、図示し
ない転写手段で用紙、OHP用ファイルやハガキ等の記
録媒体に転写し、図示しない定着手段でトナー画像を記
録媒体に定着させて画像を得る。
FIG. 1 is a longitudinal sectional view of an electrophotographic cartridge according to a first embodiment of the present invention. The electrophotographic cartridge of FIG. 1 applies a superimposed voltage of a DC voltage and an AC voltage to a brush charging device 1 made of a semiconductive fiber, and OPC or Se conventionally used as an electrostatic latent image carrier.
This is for uniformly charging the photosensitive member 3 such as a system and giving an initial potential to the surface of the photosensitive member 3. The photoreceptor 3 is then irradiated from a light source such as a laser (not shown), an LED, or a liquid crystal.
Exposure 2 of the image data is performed to form an electrostatic latent image. The toner 7 is guided by a stirring member 8 to a supply roller 5 made of a material such as conductive or insulating sponge or aluminum, and subjected to surface treatment of silicon rubber, urethane rubber, nitrile butylene rubber, natural rubber, or sponge. To the toner carrier 4 made of a flexible material such as a removed member. The toner 7 guided to the toner carrier 4 is regulated by a regulating blade 6 made of a metal spring material such as stainless steel, phosphor bronze, or nickel silver, is formed into a uniform thin layer, and is charged by friction. You. Toner carrier 4
When the thinly charged toner 7 facing the photosensitive member 3 is opposed to the photosensitive member 3, the toner is adhered to the electrostatic latent image on the photosensitive member 3 by an electric field and is developed. Next, the toner image on the photoreceptor 3 is transferred to a recording medium such as a sheet, an OHP file or a postcard by a transfer unit (not shown), and the toner image is fixed to the recording medium by a fixing unit (not shown) to obtain an image.

【0009】図2は図1の電子写真カートリッジに用い
られるブラシ帯電装置の縦断面図であり、ブラシ1a
と、プレート1bと、ガード1cで構成されている。ブ
ラシ1aはアクリルの繊維からなっており、長さは5m
m、幅5mm、繊維の太さは6.2デニール、ブラシ密
度が10万F/inch2 であり、プレート1bにより
保持されている。プレート1bは、導電性を有するステ
ンレス材からなっている。ガード1cはABS樹脂によ
り構成される。ブラシ1aとプレート1bとガード1c
とで構成された第1の実施例では、感光体3に対してブ
ラシ1aが1mm接触する状態で保持した。
[0009] Figure 2 is a longitudinal sectional view of <br/> be Lube brush charging device used in an electrophotographic cartridge of Figure 1, the brush 1a
, A plate 1b, and a guard 1c. The brush 1a is made of acrylic fiber and has a length of 5 m.
m, width 5 mm, fiber thickness 6.2 denier, brush density 100,000 F / inch2, held by plate 1b. The plate 1b is made of a conductive stainless steel material. The guard 1c is made of ABS resin. Brush 1a, plate 1b and guard 1c
In the first embodiment, the brush 1a is held in contact with the photosensitive member 3 by 1 mm.

【0010】以上の構成でブラシ1aの繊維の抵抗が1
03 Ω・cmと105 Ω・cmとの2種類のブラシを用
い、それぞれでプレート1bには、周波数450Hzを
もつ交流成分に直流成分Vdc=−700Vを重畳した
電圧をかけ、交流成分のpeak to peak電圧
Vppを変えて、解像度240dpi、プロセススピー
ド33mm/sのプリンタ装置として、面積率12.5
%の網点画像を印字し、印字品質を主観評価した一例の
結果を表1に示す。
With the above configuration, the resistance of the fiber of the brush 1a is 1
Two types of brushes of 03 Ω · cm and 10 5 Ω · cm are used, and a voltage obtained by superimposing a DC component Vdc = −700 V on an AC component having a frequency of 450 Hz is applied to each plate 1 b, and a peak to AC component is applied. By changing the peak voltage Vpp, an area ratio of 12.5 as a printer device having a resolution of 240 dpi and a process speed of 33 mm / s was obtained.
Table 1 shows the results of an example of printing a% dot image and subjectively evaluating the print quality.

【0011】 [0011]

【0012】図3は図1の電子写真カートリッジに用い
られるブラシ帯電装置の縦断面図である。図3はブラシ
1aと、帯電部材であるブラシをおさえる機構を有した
プレート1dとで構成されている。ブラシ1aは図2の
場合と同じで、アクリルの繊維からなっており、長さは
5mm、幅5mm、繊維の太さは6.2デニール、ブラ
シ密度が10万F/inch2 であり、プレート1dに
より保持されている。プレート1dは導電性を有するス
テンレス材からなっている。ブラシ1aとプレート1d
で構成された帯電装置においても、感光体3に対して、
ブラシ1aが1mm接触する状態で保持した。また図2
の場合と同様にプレート1dには周波数450Hz、V
pp=1.2kVの交流成分に直流成分Vdc=−70
0Vを重畳した電圧をかけ、解像度240dpi、プロ
セススピード33mm/sのプリンタ装置にて、印字し
たところ良好な画像が得られ、ブラシの毛の倒れを防ぐ
ことができた。
[0012] FIG. 3 is a longitudinal sectional view of <br/> be Lube brush charging device used in an electrophotographic cartridge of FIG. FIG. 3 includes a brush 1a and a plate 1d having a mechanism for holding a brush as a charging member. The brush 1a is the same as that of FIG. 2 and is made of acrylic fiber, the length is 5 mm, the width is 5 mm, the thickness of the fiber is 6.2 denier, the brush density is 100,000 F / inch2, and the plate 1d Is held by The plate 1d is made of a conductive stainless steel material. Brush 1a and plate 1d
Even in the produced strip collector in, the photosensitive member 3,
The brush 1a was held in a state of contacting 1 mm. FIG. 2
As in the case of the above, the frequency of 450 Hz, V
DC component Vdc = -70 to AC component of pp = 1.2 kV
When a voltage superimposed on 0 V was applied and printing was performed using a printer device with a resolution of 240 dpi and a process speed of 33 mm / s, a good image was obtained, and the fall of the brush hair could be prevented.

【0013】図4は図1の電子写真カートリッジに用い
られる第の実施例に係るブラシ帯電装置の縦断面図で
ある。図4の実施例はブラシ1aと、プレート1bと、
ガード1cと、フィルム1eとで構成されている。ブラ
シ1aは図2の場合と同じで、アクリルの繊維からなっ
ており、長さは5mm、幅5mm、繊維の太さは6.2
デニール、ブラシ密度が10万F/inch2 であり、
プレート1bにより保持されている。プレート1bは、
導電性を有するステンレス材からなっている。ガード1
cも図2の場合の同じくABS樹脂を用いた。図4に示
すように、フィルム1PETフィルムまたはウレタ
ンシートからなっていて、ブラシ1aから感光体3の回
転により抜けたり飛び出すブラシ1aの繊維を取り除く
ためにブラシ1aの繊維長より長い感光体3幅を有して
いる。ブラシ1aとプレート1bとフィルム1dで構成
された第の実施例の帯電装置は感光体3に対して、ブ
ラシ1aが1mm接触する状態で保持した。以上の構成
のプレート1bには周波数450Hz、Vpp=1.2
kVの交流成分に直流成分Vdc=−700Vを重畳し
た電圧をかけ、解像度240dpi、プロセススピード
33mm/sのプリンタ装置として、フィルム1の厚
みを変えて、印字したところ、厚みが0.1〜0.3m
mのとき、ブラシ1aから感光体の回転によって抜けた
り、飛び出す毛を防ぎ良好な画像を得られた。
FIG. 4 is a longitudinal sectional view of a brush charging device according to a first embodiment used in the electrophotographic cartridge of FIG. In the embodiment of FIG. 4, a brush 1a, a plate 1b,
It is composed of a guard 1c and a film 1e. The brush 1a is the same as that of FIG. 2 and is made of acrylic fiber. The length is 5 mm, the width is 5 mm, and the thickness of the fiber is 6.2.
Denier, brush density is 100,000 F / inch2,
It is held by the plate 1b. Plate 1b is
It is made of conductive stainless steel. Guard 1
For c, the same ABS resin as in FIG. 2 was used. As shown in FIG.
As described above, the film 1e is made of a PET film or a urethane sheet, and the rotation of the photosensitive member 3 from the brush 1a.
Remove the fibers of the brush 1a that fall out or fly out by rolling
With a width of the photoconductor 3 longer than the fiber length of the brush 1a
I have. The charging device according to the first embodiment, which includes the brush 1a, the plate 1b, and the film 1d, holds the brush 1a in contact with the photoreceptor 3 by 1 mm. A frequency of 450 Hz and Vpp = 1.2 are applied to the plate 1b having the above configuration.
A voltage obtained by superimposing a DC component Vdc = −700 V on an AC component of kV was applied, and printing was performed by changing the thickness of the film 1 e as a printer device having a resolution of 240 dpi and a process speed of 33 mm / s. ~ 0.3m
In the case of m, the hair was prevented from coming off or jumping out of the brush 1a due to the rotation of the photosensitive member, and a good image was obtained.

【0014】図5は図1の電子写真カートリッジに用い
られるブラシ帯電装置の縦断面図である。図5のブラシ
部は図3と同じで、ブラシ1aと、プレート1dで構成
されている。そして図1の感光体3の代えてアルマイト
処理を施し高抵抗皮膜3cを有するアルミ素管3bと感
光層3aからなる感光体を有して、この感光体に対し
て、ブラシ1aが1mm接触する状態で保持されてい
る。以上の構成のプレート1bには周波数450Hz、
Vpp=1.2kVの交流成分に直流成分Vdc=−7
00Vを重畳した電圧をかけ、解像度240dpi、プ
ロセススピード33mm/sのプリンタ装置として、印
字したところ、感光体の打痕やピンホールによるブラシ
の溶融をなくすことができた。
[0014] FIG. 5 is used in an electrophotographic cartridge shown in FIG. 1
It is a longitudinal sectional view of a brush charging device. The brush part of FIG. 5 is the same as that of FIG. 3, and includes a brush 1a and a plate 1d. In addition, a photoreceptor composed of an aluminum tube 3b having a high-resistance film 3c and a photosensitive layer 3a and having been subjected to an alumite treatment in place of the photoreceptor 3 of FIG. Held in state. The plate 1b having the above configuration has a frequency of 450 Hz,
Vpp = 1.2 kV AC component and DC component Vdc = -7
When a voltage superimposed on 00 V was applied and printing was performed as a printer device with a resolution of 240 dpi and a process speed of 33 mm / s, the nicks on the photoconductor and the melting of the brush due to pinholes could be eliminated.

【0015】[0015]

【発明の効果】以上説明したように本発明、ブラシとプ
レートで構成されたブラシ帯電装置、若しくはこれにガ
ードを設けた帯電装置を、感光体に接触させた状態で保
持し、プレートにはR・S/25.4±100Hz、V
ppが0.9〜1.3kVをもつ交流電圧に絶対値が
0.5〜1.2kVの直流電圧を重畳した電圧をかける
ことによって、特に網点画像においてモアレ画像や白い
縦スジおよび定温低湿下でのストリーマ放電による薄斑
点が発生すること無く、良好な画像を得られる効果があ
る。また、ガードやガードにフィルムを付けることによ
って感光体の回転による毛の倒れや抜け毛、飛び出し毛
を防ぎ、安定した帯電を行うことができ、また、素管に
高抵抗皮膜を有する感光体と組み合わせることにより、
ブラシの溶融を防ぐことができるという効果がある。
As described above, according to the present invention, the brush charging device composed of the brush and the plate or the charging device provided with the guard is held in contact with the photosensitive member, and the plate has the R・ S / 25.4 ± 100Hz, V
By applying a voltage obtained by superimposing a DC voltage having an absolute value of 0.5 to 1.2 kV on an AC voltage having a pp of 0.9 to 1.3 kV, particularly in a halftone image, a moire image, white vertical stripes, and constant temperature and low humidity are obtained. There is an effect that a good image can be obtained without the occurrence of thin spots due to streamer discharge below. In addition, by attaching a film to the guard or guard, it is possible to prevent the hair from falling down, falling out, or popping out due to the rotation of the photoreceptor, to perform stable charging, and to combine with a photoreceptor having a high resistance coating on the base tube By doing
There is an effect that melting of the brush can be prevented.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の電子写真カートリッジの縦断面図であ
る。
1 is a longitudinal sectional view of the electronic photographic cartridge of the present invention.

【図2】本発明に関連するブラシ帯電装置の縦断面図で
ある。
FIG. 2 is a longitudinal sectional view of a brush charging device according to the present invention.

【図3】本発明に関連するブラシ帯電装置の縦断面図で
ある。
FIG. 3 is a longitudinal sectional view of a brush charging device related to the present invention.

【図4】本発明の第の実施例のブラシ帯電装置の縦断
面図である。
FIG. 4 is a vertical sectional view of the brush charging device according to the first embodiment of the present invention.

【図5】本発明に関連するブラシ帯電装置の縦断面図で
ある。
FIG. 5 is a vertical sectional view of a brush charging device according to the present invention.

【符号の説明】[Explanation of symbols]

1 ブラシ帯電装置 1a ブラシ 1b,1d プレート 1c ガード 1e フィルム 2 露光 3 感光体 3a 感光層 3b アルミ素管 3c 高抵抗皮膜 4 トナー担持体 5 供給ローラ 6 規制ブレード 7 トナー 8 攪拌部材 9 トナーホッパ 10 クリーナ 11 シャッタ DESCRIPTION OF SYMBOLS 1 Brush charging device 1a Brush 1b, 1d plate 1c Guard 1e Film 2 Exposure 3 Photoconductor 3a Photosensitive layer 3b Aluminum pipe 3c High resistance film 4 Toner carrier 5 Supply roller 6 Regulator blade 7 Toner 8 Stirrer 9 Toner hopper 10 Cleaner 11 Shutter

フロントページの続き (56)参考文献 特開 昭57−72157(JP,A) 特開 昭57−64754(JP,A) 特開 昭60−220587(JP,A) 特開 昭57−58169(JP,A) 特開 平5−80567(JP,A) 特開 平5−11572(JP,A) 実開 昭62−111200(JP,U) (58)調査した分野(Int.Cl.7,DB名) G03G 15/02 101 A46B 15/00 Continuation of the front page (56) References JP-A-57-72157 (JP, A) JP-A-57-64754 (JP, A) JP-A-60-220587 (JP, A) JP-A-57-58169 (JP) JP-A-5-80567 (JP, A) JP-A-5-11572 (JP, A) JP-A-62-1111200 (JP, U) (58) Fields studied (Int. Cl. 7 , DB Name) G03G 15/02 101 A46B 15/00

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 電子写真プロセスに用いる被帯電体に電
圧を印加した帯電部材を接触して被帯電体を帯電させる
ブラシ帯電装置において、印加する電圧が直流電圧に交
流電圧を重畳した重畳電圧であり、導電性を有するステ
ンレス材から成るプレート上に保持されアクリル繊維か
らなる帯電部材であるブラシと、帯電部材であるブラシ
の下流側にABS樹脂から成るブラシ倒れ防止のガード
と、ブラシから被帯電体の回転により抜けたり飛び出す
ブラシの繊維を取り除くためのブラシの繊維長より長く
被帯電体幅を有するPETフィルムまたはウレタンシー
トから成るフィルムとを備えることを特徴とするブラシ
帯電装置。
1. A superimposed Oite contact charging member a voltage is applied to the member to be charged used in the electrophotographic process to a brush charging device for charging the member to be charged, the voltage to be applied is an AC voltage superimposed on a DC voltage Voltage and conductive stage
Acrylic fiber held on a plate of stainless steel
Brush as a charging member, and a brush as a charging member
Brush guard made of ABS resin on the downstream side
, It comes off or jumps out of the brush due to the rotation of the charged object
Longer than the brush fiber length to remove brush fibers
PET film or urethane with a width to be charged
Brush charging device, characterized in that it comprises a film made of and.
JP24189393A 1993-09-29 1993-09-29 Brush charging device Expired - Fee Related JP3146788B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP24189393A JP3146788B2 (en) 1993-09-29 1993-09-29 Brush charging device
US08/291,883 US5479244A (en) 1993-09-29 1994-08-17 Charger for charging an image holding member included in an image forming apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24189393A JP3146788B2 (en) 1993-09-29 1993-09-29 Brush charging device

Publications (2)

Publication Number Publication Date
JPH0798534A JPH0798534A (en) 1995-04-11
JP3146788B2 true JP3146788B2 (en) 2001-03-19

Family

ID=17081124

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24189393A Expired - Fee Related JP3146788B2 (en) 1993-09-29 1993-09-29 Brush charging device

Country Status (1)

Country Link
JP (1) JP3146788B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200485357Y1 (en) * 2015-05-18 2017-12-27 쿠안-룽 린 Pre-embedded/pre-reserved perforation device and pipe arrangement box having pre-embedded perforation device

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3438795B2 (en) * 1994-11-07 2003-08-18 ミノルタ株式会社 Image forming device
JPH11219003A (en) * 1998-01-30 1999-08-10 Nec Niigata Ltd Electrifying device
JPH11295966A (en) * 1998-04-14 1999-10-29 Nec Niigata Ltd Brush type electrifier
US6400916B1 (en) 1998-11-30 2002-06-04 Canon Kabushiki Kaisha Process cartridge and electrophotographic apparatus
EP1431843A3 (en) * 2002-08-30 2004-09-15 Ricoh Company, Ltd. Cleanerless image forming apparatus and process cartridge for use in the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200485357Y1 (en) * 2015-05-18 2017-12-27 쿠안-룽 린 Pre-embedded/pre-reserved perforation device and pipe arrangement box having pre-embedded perforation device

Also Published As

Publication number Publication date
JPH0798534A (en) 1995-04-11

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