JPH03131877A - Developing device - Google Patents
Developing deviceInfo
- Publication number
- JPH03131877A JPH03131877A JP1269455A JP26945589A JPH03131877A JP H03131877 A JPH03131877 A JP H03131877A JP 1269455 A JP1269455 A JP 1269455A JP 26945589 A JP26945589 A JP 26945589A JP H03131877 A JPH03131877 A JP H03131877A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- developer
- developing sleeve
- end parts
- developing
- 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
- 238000000576 coating method Methods 0.000 claims abstract description 18
- 239000011248 coating agent Substances 0.000 claims description 16
- 230000032258 transport Effects 0.000 claims description 3
- 238000007790 scraping Methods 0.000 abstract description 5
- 238000011109 contamination Methods 0.000 abstract description 4
- 238000010186 staining Methods 0.000 abstract 2
- 238000007789 sealing Methods 0.000 description 17
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 4
- 239000004677 Nylon Substances 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- 238000005524 ceramic coating Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 108091008695 photoreceptors Proteins 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Landscapes
- Dry Development In Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
の１ 里
本発明は、電子写真方式や静電記録方式等を利用した画
像形成装置において、像担持体上に形成した静電潜像を
現像するのに用いられる現像装置に関し、特に現像剤を
担持して、搬送する現像剤担持体の両端部に端部シール
部材を配設した現像装置に関するものである。Detailed Description of the Invention No. 1 The present invention relates to a developing device used to develop an electrostatic latent image formed on an image carrier in an image forming apparatus using an electrophotographic method, an electrostatic recording method, or the like. The present invention relates to an apparatus, and particularly to a developing apparatus in which end seal members are disposed at both ends of a developer carrier carrying and transporting developer.
１えΩ且ｌ
電子写真方式や静電記録方式等を利用した画像形成装置
において使用される現像装置は、第３図（ａ）、（ｂ）
に示すように、現像容器２内に収容された現像剤８を、
マグネット５を内蔵した現像剤担持体としての現像スリ
ーブ６に担持して、非磁性ブレード３により現像剤８の
量を適正量に規制しながら、像担持体１との現像位置へ
と搬送し、像担持体ｌ上に形成された静電潜像を現像剤
８で現像して、トナー像として可視化するものである
このような現像装置では、現像スリーブ６の回転および
攪拌棒９による現像剤８の撹拌により、現像剤８のトナ
ーが現像容器２から飛散し、画像形成装置内を汚染する
ので、それを防止するためにシール手段として、トナー
飛散防止用遮蔽板７の他に、現像スリーブ６の両端部に
植毛弾性体や弾性樹脂等からなる端部シール部材４を設
けている。1eΩandl The developing device used in an image forming apparatus using an electrophotographic method, an electrostatic recording method, etc. is shown in FIGS. 3(a) and (b).
As shown in FIG.
The developer 8 is carried on a developing sleeve 6 as a developer carrier having a built-in magnet 5, and is transported to a developing position with the image carrier 1 while regulating the amount of developer 8 to an appropriate amount by a non-magnetic blade 3. In such a developing device, the electrostatic latent image formed on the image carrier L is developed with the developer 8 and visualized as a toner image. Due to the stirring, the toner in the developer 8 scatters from the developer container 2 and contaminates the inside of the image forming apparatus. To prevent this, in addition to the shielding plate 7 for preventing toner scattering, the developing sleeve 6 is used as a sealing means. An end sealing member 4 made of flocked elastic material, elastic resin, etc. is provided at both ends.
が しよ と る
しかしながら、トナー飛散用遮蔽板７やシール部材４に
よって現像容器２内の現像剤８のトナーの流出を防止す
ることはできるものの、像担持体１と現像スリーブ６と
が対向した現像位置の箇所では、シール部材４を設ける
ことができないことから、そのシール部材４のない部分
に飛散したトナーが、現像スリーブ６の両端部（金属鏡
面部）に付着する。However, although it is possible to prevent the toner from the developer 8 in the developer container 2 from flowing out using the toner scattering shielding plate 7 and the sealing member 4, it is possible to prevent the toner from flowing out of the developer 8 in the developer container 2. Since the sealing member 4 cannot be provided at the developing position, the toner scattered in the area where the sealing member 4 is not provided adheres to both ends (metallic mirror surface portions) of the developing sleeve 6.
そしてその付着したトナーが現像バイアスにより像担持
体１に飛翔して、像担持体１両端部にトナーによる地汚
れを生じたり、その像担持体ｌに飛翔したトナーが端部
シール材４により掻き落とされ、こぼれ落ちて、トナー
による画像形成装置内の汚染が生じる。The adhered toner may fly onto the image carrier 1 due to the developing bias, causing toner background stains on both ends of the image carrier 1, or the toner that has flown onto the image carrier 1 may be scratched by the end sealing material 4. Dropped and spilled toner contaminates the image forming apparatus.
これらのことは、現像スリーブの現像位置における両端
部へのトナーの回り込みによっても、同様に生じる。These things also occur when the toner wraps around to both ends of the developing sleeve at the developing position.
従って、本発明の目的は、現像スリーブなど現像剤担持
体両端部へのトナーの付着や回り込みを防止して、像担
持体両端部のトナーによる地汚れやトナーの掻き落とし
による画像形成装置内の汚染をなくした現像装置を提供
することである。Therefore, it is an object of the present invention to prevent toner from adhering to or sneaking around to both ends of a developer carrier such as a developing sleeve, and to prevent scumming caused by toner on both ends of the image carrier and the inside of an image forming apparatus caused by toner scraping. It is an object of the present invention to provide a developing device free from contamination.
を るための 上記目的は本発明の現像装置にて達成される。in order to The above object is achieved by the developing device of the present invention.
要約すれば本発明は、像担持体上に形成された静電潜像
を現像する現像剤を担持して、搬送する現像剤担持体両
端部に端部シール部材を配設した現像装置において、前
記現像剤担持体の両端部に、前記現像剤のトナーと同極
性に帯電する絶縁性部材からなる被覆を設けたことを特
徴とする現像装置である０本発明の一態様によれば、前
記絶縁性部材は、前記端部シール部材および前記現像剤
との摺擦により、前記トナーと同極性に摩擦帯電される
。To summarize, the present invention provides a developing device in which end seal members are disposed at both ends of a developer carrier that carries and transports a developer for developing an electrostatic latent image formed on an image carrier. According to one aspect of the present invention, the developing device is characterized in that a coating made of an insulating member that is charged to the same polarity as the toner of the developer is provided at both ends of the developer carrier. The insulating member is triboelectrically charged to the same polarity as the toner by rubbing against the end seal member and the developer.
宜」Ｌ例
第１図（ａ）は、本発明の現像装置の一実施例を示す構
成図、第１図（ｂ）は、第１図（ａ）のＡ−Ａ線矢視図
である。FIG. 1(a) is a configuration diagram showing one embodiment of the developing device of the present invention, and FIG. 1(b) is a view taken along the line A--A in FIG. 1(a). .
第１図（ａ）、（ｂ）に示すように、現像装置は、現像
剤８を収容した現像容器２内に、現像剤担持体としての
現像スリーブ６を矢印ａ方向に回転自在に設置している
。現像容器２内には現像スリーブ６へ現像剤８を供給す
る撹拌棒９が設けられ、現像スリーブ６内には供給され
た現像剤８を担持させるマグネット５が不動に設置され
、現像スリーブ６上には担持された現像剤８の量を規制
する非磁性ブレード３が設けられる。マグネット５によ
り現像スリーブ６上に担持された現像剤８は、ブレード
３により適正量に規制され、スリーブ８の回転により像
担持体ｌと対向した現像位置へと搬送される。As shown in FIGS. 1(a) and 1(b), the developing device includes a developing sleeve 6 as a developer carrying member installed in a developing container 2 containing a developer 8 so as to be rotatable in the direction of arrow a. ing. A stirring rod 9 for supplying the developer 8 to the developing sleeve 6 is provided in the developing container 2, and a magnet 5 for supporting the supplied developer 8 is installed immovably in the developing sleeve 6. is provided with a non-magnetic blade 3 that regulates the amount of developer 8 carried thereon. The developer 8 carried on the developing sleeve 6 by the magnet 5 is regulated to an appropriate amount by the blade 3, and is conveyed to a developing position facing the image carrier 1 by rotation of the sleeve 8.
本実施例では、現像スリーブ６は非磁性材料製とされ、
現像剤８はマイナス帯電性非磁性トナーおよび絶縁性樹
脂コート磁性キャリアからなる２成分現像剤とされてい
る。また像担持体１はアモルファスＳｉ感光体とされて
いる。In this embodiment, the developing sleeve 6 is made of a non-magnetic material,
The developer 8 is a two-component developer consisting of a negatively charged non-magnetic toner and an insulating resin-coated magnetic carrier. Further, the image carrier 1 is an amorphous Si photoreceptor.
像担持体１との現像位置へ搬送された現像剤８は、そこ
でマグネット５の現像極Ｓ、により磁気ブラシを形成し
、そして現像スリーブ６に印加された直流電圧と交番電
圧により、トナーが潜像担持体１へ飛翔して、潜像担持
体１上の静電潜像に付着し、静電潜像がトナー像として
可視化、現像される。The developer 8 conveyed to the development position with the image carrier 1 forms a magnetic brush by the development pole S of the magnet 5, and the toner is latent by the DC voltage and alternating voltage applied to the development sleeve 6. The toner flies to the image carrier 1 and adheres to the electrostatic latent image on the latent image carrier 1, and the electrostatic latent image is visualized and developed as a toner image.
このような現像過程で現像剤８から遊離または浮遊した
トナーの飛散を防止するために、従来と同様、現像スリ
ーブ６の両端部に、非磁性ブレード３の箇所から像担持
体ｌと対向した現像位置へ掛かる部分を囲むように、ト
ナー飛散防止用遮蔽板７が設けられる。また同様に、現
像スリーブ６の両端部に端部シール部材４が設けられる
。In order to prevent scattering of the toner that is free or floating from the developer 8 during such a development process, as in the past, a developer is installed at both ends of the developing sleeve 6 from the non-magnetic blade 3 facing the image carrier l. A shielding plate 7 for preventing toner scattering is provided so as to surround the portion that extends to the position. Similarly, end seal members 4 are provided at both ends of the developing sleeve 6.
端部シール部材４は現像スリーブ６の両端部の現像位置
と反対側の部分を、非磁性ブレード３の箇所から下部に
掛けて覆うように設けられる。端部シール部材４は間隙
４ａを有する断面コ字状に形成されており、シール部材
４を現像容器２の側壁２ａに設けた凹部２ｂ内に収容し
て、間隙４ａ内に充填部材１１を押入することにより、
シール部材４を現像スリーブ６の両端部に押し付けてい
る。端部シール部材４は４フツ化エチレン系の弾性体樹
脂からなる。The end sealing members 4 are provided so as to cover the opposite ends of the developing sleeve 6 from the position of the non-magnetic blade 3 on the side opposite to the developing position. The end sealing member 4 is formed into a U-shaped cross section with a gap 4a, and the sealing member 4 is accommodated in a recess 2b provided in the side wall 2a of the developer container 2, and the filling member 11 is pushed into the gap 4a. By doing so,
A sealing member 4 is pressed against both ends of the developing sleeve 6. The end seal member 4 is made of a tetrafluoroethylene-based elastic resin.
本発明によれば、トナーの飛散防止をより確実にするた
めに、現像スリーブ６の両端部に絶縁性部材からなる被
覆１０が設けられる。この被覆１０は、端部シール部材
４および現像剤８との摺擦により、現像剤８のトナーと
同極性に摩擦帯電するようになっている０本実施例では
、被覆１０は現像剤８のマイナス帯電性のトナーと同極
性に帯電するフッ素樹脂からなり、現像スリーブ６にフ
ッ素樹脂を数１０μｍ厚に均一にコートし、真空焼付け
により形成した。現像スリーブ６は５ＵＳ３１６製のも
のを用いた。上述したように、本実施例では端部シール
部材４は４フツ化エチレン系の樹脂を用いたが、フッ素
樹脂からなる被覆１０をより強くマイナスに帯電させる
ためには、端部シール部材４はナイロン、ポリカーボネ
ート、アクリル等の弾性体樹脂から形成することがよい
。According to the present invention, the coating 10 made of an insulating member is provided at both ends of the developing sleeve 6 in order to more reliably prevent toner from scattering. This coating 10 is triboelectrically charged to the same polarity as the toner in the developer 8 due to the friction between the end seal member 4 and the developer 8. The developing sleeve 6 is made of a fluororesin that is charged to the same polarity as the negatively charged toner, and is formed by uniformly coating the developing sleeve 6 with the fluororesin to a thickness of several tens of micrometers and vacuum baking. The developing sleeve 6 was made of 5US316. As mentioned above, in this embodiment, the end seal member 4 is made of tetrafluoroethylene resin, but in order to more strongly negatively charge the coating 10 made of fluororesin, the end seal member 4 is made of It is preferably formed from an elastic resin such as nylon, polycarbonate, or acrylic.
上記のような被覆ｌＯを構成する絶縁性部材としては、
トナーがネガトナー場合、フッ素系樹脂、ポリエチレン
、ポリプロピレン、ポリエステル等が使用できる。また
ＰＶＤＦ等のセラミックコート材も使用可能である。一
方トナーがポジトナーの場合は、ナイロン、ポリカーボ
ネート、アクリル等が使用可能である。As an insulating member constituting the above-mentioned coating lO,
When the toner is a negative toner, fluororesin, polyethylene, polypropylene, polyester, etc. can be used. Furthermore, ceramic coating materials such as PVDF can also be used. On the other hand, when the toner is a positive toner, nylon, polycarbonate, acrylic, etc. can be used.
本発明の現像装置は以上のように構成される。The developing device of the present invention is configured as described above.
前述したように、像担持体１と現像スリーブ６とが対向
した現像位置の箇所では、シール部材４を設けることが
できないことから、その端部シール部材４のない部分に
飛散したトナーが、従来は現像スリーブ６の両端部に付
着していた。また現像スリーブの現像位置における両端
部へのトナーの回り込みによっても、両端部にトナーの
付着が生じていた。このとき本発明では、現像スリーブ
６の両端部にトナーと同極性に帯電するフッ素樹脂から
なる被覆１０を設けているので、飛散したトナーが現像
スリーブ６の両端部に付着することかない。このため、
従来生じていた付着したトナーが現像バイアスにより像
担持体ｌに飛翔して、像担持体ｌにトナーによる地汚れ
を発生したり、その像担持体１に飛翔したトナーの端部
シール材４による掻き落としによって、画像形成装置内
へのトナーの飛散が発生したりする現象がな（なる。As mentioned above, since the sealing member 4 cannot be provided at the development position where the image carrier 1 and the developing sleeve 6 face each other, the toner scattered at the end where the sealing member 4 is not provided is were attached to both ends of the developing sleeve 6. Furthermore, toner adhesion to both ends also occurred due to the toner flowing around to both ends of the developing sleeve at the development position. At this time, in the present invention, since the coating 10 made of fluororesin which is charged to the same polarity as the toner is provided on both ends of the developing sleeve 6, the scattered toner does not adhere to both ends of the developing sleeve 6. For this reason,
Conventionally, adhered toner flies to the image carrier 1 due to the development bias, causing background smudges due to toner on the image carrier 1, and the toner that flies to the image carrier 1 is caused by the edge sealing material 4. This eliminates the phenomenon of toner scattering into the image forming apparatus due to scraping.
また本発明によれば、端部シール部材４のシール不良お
よびそのシール不良によるシール部材４の箇所からのト
ナーの漏れに対しても、現像スリーブ６の両端部に被覆
１０を設けることと、その被覆ｌＯがトナーと同極性に
帯電することから、シール性が大巾に改善され、トナー
の漏れもな（なる。Further, according to the present invention, the coating 10 is provided at both ends of the developing sleeve 6, and the coating 10 is provided at both ends of the developing sleeve 6 to prevent sealing failure of the end sealing member 4 and toner leakage from the sealing member 4 due to the sealing failure. Since the coating 1O is charged to the same polarity as the toner, the sealing performance is greatly improved and toner leakage is eliminated.
更に被覆ｌＯがフッ素樹脂からなるために、現像スリー
ブ６の両端部の滑り摩擦係数が小さくなり、現像スリー
ブ６の駆動負荷の軽減および現像スリーブ６両端部の摩
擦によるスリーブ６の温度上昇も低減する等の効果もあ
る。Furthermore, since the coating 1O is made of fluororesin, the coefficient of sliding friction at both ends of the developing sleeve 6 is reduced, reducing the driving load on the developing sleeve 6 and also reducing the rise in temperature of the sleeve 6 due to friction at both ends of the developing sleeve 6. There are also other effects.
以上の実施例では、現像剤８として非磁性トナーと磁性
キャリアからなる２成分現像剤を用いた場合を示したが
、本発明はこれに限定されず、現像剤８として１成分磁
性トナー、２成分非磁性トナーを用いることもできる。In the above embodiments, a two-component developer consisting of a non-magnetic toner and a magnetic carrier was used as the developer 8, but the present invention is not limited thereto. Component non-magnetic toners can also be used.
第２図（ａ）は、本発明の現像装置の他の実施例を示す
構成図、第２図（ｂ）は、第２図（ａ）のＡ−Ａ線矢視
図である。FIG. 2(a) is a block diagram showing another embodiment of the developing device of the present invention, and FIG. 2(b) is a view taken along the line A--A in FIG. 2(a).
第２図（ａ）、（ｂ）に示すように、本実施例の現像装
置では、現像スリーブ６の両端部の被覆ｌＯを厚く形成
することによって、現像スリーブ６の両端部に被覆ｌＯ
による段差１０ａを設け、そして端部シール部材４の被
覆１０側の部分を現像スリーブ６に沿って内方向に延出
して、その延出部に段差１０ａを覆う鍔部４ｂを設けた
ことが特徴である。本現像装置のその他の構成は第１図
（ａ）、（ｂ）に示した現像装置と基本的に同じで、第
２（ａ）、（ｂ）において第１図（ａ）、（ｂ）に付し
た符号と同一の符号は同一の部材を示す。As shown in FIGS. 2(a) and 2(b), in the developing device of this embodiment, by forming the coating lO thickly on both ends of the developing sleeve 6, the coating lO is formed on both ends of the developing sleeve 6.
A feature is that a step 10a is provided, and a portion of the end seal member 4 on the covering 10 side extends inward along the developing sleeve 6, and a flange portion 4b that covers the step 10a is provided at the extended portion. It is. The other configurations of this developing device are basically the same as those shown in FIGS. 1(a) and (b), and the developing device shown in FIGS. The same reference numerals as the reference numerals denote the same members.
本実施例の現像装置では、現像スリーブ４の両端部に被
覆１０による段差１０ａを設けて、その段差１０ａを端
部シール部材４の延出部の鍔部４ｂで覆うので、トナー
の回り込み防止がより向上でき、現像スリーブ６両端部
へのトナーの付着防止を一段と向上できる。In the developing device of this embodiment, a step 10a formed by the coating 10 is provided at both ends of the developing sleeve 4, and the step 10a is covered by the flange 4b of the extending portion of the end seal member 4, so that toner can be prevented from going around. It is possible to further improve the prevention of toner adhesion to both ends of the developing sleeve 6.
免艶二激１
以上説明したように、本発明は、像担持体上に形成され
た静電潜像を現像する現像剤を担持して、搬送する現像
剤担持体両端部に端部シール部材を配設した現像装置に
おいて、現像剤担持体の両端部に、現像剤のトナーと同
極性に帯電する絶縁性部材からなる被覆を設けたので、
現像剤担持体両端部へのトナーの付着や回り込みを防止
でき、像担持体両端部のトナーによる地汚れやトナーの
掻き落としによる画像形成装置内の汚染がなくなる。As described above, the present invention provides end seal members at both ends of the developer carrier that supports and transports the developer for developing the electrostatic latent image formed on the image carrier. In the developing device equipped with this, a coating made of an insulating member that is charged to the same polarity as the toner of the developer is provided at both ends of the developer carrier.
It is possible to prevent toner from adhering to and wrapping around both ends of the developer carrier, and to eliminate background smudges caused by toner at both ends of the image carrier and contamination within the image forming apparatus due to scraping of toner.
第１図（ａ）は、本発明の現像装置の一実施例を示す構
成図、第１図（ｂ）は、第１図（ａ）のＡ−Ａ線矢視図
である。
第２図（ａ）は、本発明の現像装置の他の実施例を示す
構成図、第２図（ｂ）は、第２図（ａ）のＡ−Ａ線矢視
図である。
第３図（ａ）は、従来の現像装置を示す構成図、第３図
（ｂ）は、第３図（ａ）のＡ−Ａ線矢視図である。
ｂ
０
０ａ
：像担持体
：端部シール部材
：鍔部
：現像スリーブ
：現像剤
：被覆
：段差
第１図
（ａ）
第２図
（ａ）
−Ｌ」−FIG. 1(a) is a block diagram showing one embodiment of the developing device of the present invention, and FIG. 1(b) is a view taken along the line A--A in FIG. 1(a). FIG. 2(a) is a block diagram showing another embodiment of the developing device of the present invention, and FIG. 2(b) is a view taken along the line A--A in FIG. 2(a). FIG. 3(a) is a configuration diagram showing a conventional developing device, and FIG. 3(b) is a view taken along the line A--A in FIG. 3(a). b 0 0a: Image carrier: End sealing member: Flange: Developing sleeve: Developer: Covering: Step Figure 1 (a) Figure 2 (a) -L''-
Claims (1)
を担持して、搬送する現像剤担持体の両端部に端部シー
ル部材を配設した現像装置において、前記現像剤担持体
の両端部に、前記現像剤のトナーと同極性に帯電する絶
縁性部材からなる被覆を設けたことを特徴とする現像装
置。 ２）前記絶縁性部材は、前記端部シール部材および前記
現像剤との摺擦により、前記トナーと同極性に摩擦帯電
する請求項１記載の現像装置。[Scope of Claims] 1) A developing device in which end seal members are disposed at both ends of a developer carrier that supports and transports a developer for developing an electrostatic latent image formed on an image carrier. A developing device characterized in that a coating made of an insulating member that is charged to the same polarity as the toner of the developer is provided on both ends of the developer carrier. 2) The developing device according to claim 1, wherein the insulating member is triboelectrically charged to the same polarity as the toner by rubbing against the end seal member and the developer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1269455A JPH03131877A (en) | 1989-10-17 | 1989-10-17 | Developing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1269455A JPH03131877A (en) | 1989-10-17 | 1989-10-17 | Developing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03131877A true JPH03131877A (en) | 1991-06-05 |
Family
ID=17472676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1269455A Pending JPH03131877A (en) | 1989-10-17 | 1989-10-17 | Developing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03131877A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0913741A2 (en) * | 1997-10-30 | 1999-05-06 | Canon Kabushiki Kaisha | Magnetic seal for a developing apparatus |
| JP2008185663A (en) * | 2007-01-29 | 2008-08-14 | Canon Inc | Developing device, and image forming apparatus |
| US7668481B2 (en) | 2005-09-02 | 2010-02-23 | Murata Machinery, Ltd. | Developing device and image forming device including a seal member |
-
1989
- 1989-10-17 JP JP1269455A patent/JPH03131877A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0913741A2 (en) * | 1997-10-30 | 1999-05-06 | Canon Kabushiki Kaisha | Magnetic seal for a developing apparatus |
| EP0913741A3 (en) * | 1997-10-30 | 2000-07-26 | Canon Kabushiki Kaisha | Magnetic seal for a developing apparatus |
| EP1494091A2 (en) * | 1997-10-30 | 2005-01-05 | Canon Kabushiki Kaisha | Magnetic seal for a developing apparatus |
| EP1494091A3 (en) * | 1997-10-30 | 2005-01-19 | Canon Kabushiki Kaisha | Magnetic seal for a developing apparatus |
| US7668481B2 (en) | 2005-09-02 | 2010-02-23 | Murata Machinery, Ltd. | Developing device and image forming device including a seal member |
| JP2008185663A (en) * | 2007-01-29 | 2008-08-14 | Canon Inc | Developing device, and image forming apparatus |
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