JPH0753089Y2 - Development device - Google Patents
Development deviceInfo
- Publication number
- JPH0753089Y2 JPH0753089Y2 JP1986095252U JP9525286U JPH0753089Y2 JP H0753089 Y2 JPH0753089 Y2 JP H0753089Y2 JP 1986095252 U JP1986095252 U JP 1986095252U JP 9525286 U JP9525286 U JP 9525286U JP H0753089 Y2 JPH0753089 Y2 JP H0753089Y2
- Authority
- JP
- Japan
- Prior art keywords
- developer
- toner
- scraper
- sleeve
- 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.)
- Expired - Lifetime
Links
Landscapes
- Magnetic Brush Developing In Electrophotography (AREA)
- Dry Development In Electrophotography (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は乾式２成分現像剤を用いた２成分現像法、特に
小径現像スリーブへの現像剤補給・搬送及び混合・撹拌
をそれぞれ独立に行ないうる小型・軽量・安価な現像装
置を提供するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is a two-component developing method using a dry two-component developer, and in particular, the developer replenishment / conveyance and the mixing / agitation to a small-diameter developing sleeve are independently performed. The present invention provides a compact, lightweight, and inexpensive developing device.
従来現像剤担持体としての現像スリーブ軸方向に現像剤
の搬送・供給する系では、スクリュ等で現像剤を軸方向
に搬送しながらスリーブへ即時的に供給するためのもの
があある。この場合、新しい補給用トナーを供給する
と、補給されたトナーが帯電不十分であるにもかかわら
ず、補給されたトナーが良く攪拌・混合されずにスリー
ブへ移動し、画像に地カブリ、反転カブリとして現れる
欠点があった。2. Description of the Related Art Conventionally, a system for conveying and supplying a developer in the axial direction of a developing sleeve as a developer carrying member is for supplying the developer to the sleeve immediately while conveying the developer in the axial direction with a screw or the like. In this case, if new replenishment toner is supplied, the replenished toner moves to the sleeve without being well stirred and mixed, and the background fog and reversal fog are generated on the image even though the replenished toner is not sufficiently charged. There was a defect that appeared as.
また、特開昭51-15443に示される現像法も同様の傾向に
あった。The developing method disclosed in JP-A-51-15443 has the same tendency.
本考案は上述従来例の欠点を除去し、単純な構成で画質
を良好にし、画像カブリ現象を解消することにある。The present invention eliminates the above-mentioned drawbacks of the conventional example, improves the image quality with a simple configuration, and eliminates the image fog phenomenon.
上記目的を達成する本考案は、現像剤を担持する現像剤
担持体と、この現像剤担持体上の現像剤をかき取るスク
レーパと、このスクレーパより上方に設けられ現像剤担
持体にむけて現像剤を供給する第１現像剤搬送手段と、
スクレーパより下方にホッパー内の新しい現像剤を補給
する現像剤補給手段と、スクレーパより下方に設けられ
スクレーパによりかき取られた現像剤と現像剤補給手段
によって補給された現像剤を第１現像剤搬送手段へ供給
する第２現像剤搬送手段と、を有することを特徴とする
現像装置である。The present invention that achieves the above object is to provide a developer carrying member carrying a developer, a scraper for scraping off the developer on the developer carrying member, and a developing device provided above the scraper for the developer carrying member. First developer transporting means for supplying the developer,
The developer replenishing means for replenishing the new developer in the hopper below the scraper, the developer scraped off by the scraper provided below the scraper and the developer replenished by the developer replenishing means, and the first developer conveying means. And a second developer transporting means for supplying the developing means to the developing means.
本考案によれば、補給されたトナー粒子が不用意に現像
域へ供給されることがなくなり、良好な画像形成が達成
された。又、耐久や環境変動での画質低下も防止するに
至った。According to the present invention, the replenished toner particles are prevented from being carelessly supplied to the developing area, and good image formation is achieved. Further, it has been possible to prevent deterioration of image quality due to durability and environmental changes.
第１図に本考案の実施例を数々の好ましい条件とともに
示す。FIG. 1 shows an embodiment of the present invention together with a number of preferable conditions.
１は像担持体、２は現像剤担持体（以下、現像スリーブ
と表する）、３は現像剤担持体２の内部に固定されたマ
グネツトと、担持体２は現像部で像担持体と同方向に回
転する。スリーブ２に配置されたマグネツト３により現
像剤が像担持体側に搬送され、現像極S1によりキヤリア
粒子とトナー粒子とを有している磁気ブラシを形成し、
静電潜像に対応した現像を行なう。Reference numeral 1 is an image carrier, 2 is a developer carrier (hereinafter referred to as a developing sleeve), 3 is a magnet fixed inside the developer carrier 2, and carrier 2 is the same as the image carrier in the developing section. Rotate in the direction. The magnet 3 arranged on the sleeve 2 conveys the developer to the image carrier side, and the developing pole S 1 forms a magnetic brush having carrier particles and toner particles,
Develop corresponding to the electrostatic latent image.
ここで第１図の断面図からもわかるように現像スリーブ
２に対向する部分では、上・下スクリユ41,4のみで現像
スリーブ２への供給搬送を行ない攪拌・混合する手段は
設けていない。Here, as can be seen from the cross-sectional view of FIG. 1, in the portion facing the developing sleeve 2, only the upper and lower screws 41, 4 are used to supply and convey to the developing sleeve 2, and no means for stirring and mixing is provided.
別途上・下スクリユ41・４は、第２図（ａ）に示すよう
にスリーブ長より長くなっており、現像域及びスリーブ
２より長く伸長した領域Ｃでキャリアとトナーの確実な
攪拌・混合が行われる。Separately, the upper and lower screws 41.4 are longer than the sleeve length as shown in FIG. 2 (a), and the carrier and toner are surely stirred and mixed in the developing region and the region C extending longer than the sleeve 2. Done.
それぞれ、独立した機能を小型・軽量で達成した。以下
で詳しく説明する。Each has achieved independent functions with a small size and light weight. This will be described in detail below.
一度現像に寄与し、トナー濃度の低下した現像剤が下ス
クリユ４によって領域Ｃで曲率をもったチユーブ内に搬
送され、上スクリユ部まで運ばれる。この時、不図示の
トナー濃度検出器からの指令でトナー攪拌棒12により供
給されたトナーも現像剤収納部トナーホツパ11からメツ
シユ開口部13のトナー補給口16を経て供給され、一緒に
チユーブ内に運ばれる領域Ｃのスクリユにより両者が十
分攪拌・混合され規定のトナー濃度になった現像剤が連
結開口42で上スクリユ41に受け渡され現像スリーブの上
部へ搬送される。この時上スクリユは隔壁５によってあ
る一定量現像剤を貯めた状態でスリーブの手前から奥へ
と現像剤が搬送される。そして隔壁５には開口部51が図
に示すように開いており一定量以上の現像剤は、開口部
51からスリーブへと供給される。この時、上スクリユ
は、隔壁５によってスリーブから隔離されており、スリ
ーブに保持された現像剤の動きを妨害することはない。
上スクリユから供給された現像剤はスクレーパ６とキヤ
リア返し８、さらにマグネツトの搬送極とカツト極N1に
よって搬送・混合された十分電荷を附与される。そし
て、ドクターブレード７で規制され、適量の現像剤だけ
が、現像極側へ搬送され、現像極で磁気ブラシを形成し
現像がなされる。The developer which once contributed to the development and whose toner concentration is lowered is conveyed by the lower screw 4 into the tube having the curvature in the region C, and is conveyed to the upper screw portion. At this time, the toner supplied by the toner agitation rod 12 in response to a command from a toner concentration detector (not shown) is also supplied from the toner container 11 of the developer accommodating portion through the toner replenishing port 16 of the mesh opening 13 and together in the tube. The developer having a prescribed toner concentration by sufficiently mixing and mixing them by the screw in the conveyed region C is transferred to the upper screw 41 at the connection opening 42 and is conveyed to the upper part of the developing sleeve. At this time, in the upper screw, the developer is conveyed from the front side to the back side of the sleeve while the developer is stored in a certain amount by the partition wall 5. The partition wall 5 has an opening 51 as shown in FIG.
Supplied from 51 to the sleeve. At this time, the upper screw is separated from the sleeve by the partition wall 5 and does not interfere with the movement of the developer held in the sleeve.
The developer supplied from the upper screw is provided with a sufficient electric charge which is conveyed and mixed by the scraper 6, the carrier 8 and the magnet conveying pole and the cutting pole N 1 . Then, the developer is regulated by the doctor blade 7, and only a proper amount of the developer is conveyed to the developing electrode side, and a magnetic brush is formed at the developing electrode to perform the development.
現像に寄与した現像剤は再び現像器内にスリーブ回転に
順じて搬送され、この現像剤の一部である、現像剤のう
ちトナー残量の少ない表面部はスクレーパ６によってか
き取られ、スリーブから離れた位置にある下スクリュ４
側に供給され補給トナーを受けるべく領域Ｃに搬送され
ることとなる。The developer that has contributed to the development is conveyed again into the developing unit in accordance with the rotation of the sleeve, and a part of the developer, which has a small amount of remaining toner, is scraped off by the scraper 6 and the sleeve is removed. Lower screw 4 located away from
The toner is supplied to the side and is conveyed to the area C to receive the replenishment toner.
これらの過程でスクレーパ６はスリーブの現像極での穂
立ち長と同レベルか又はそれより小さい間隙を設けてス
リーブに対向させている。これにより現像時に最も現像
に寄与した最上層のトナー濃度の低下した現像剤のみス
クレーパ６によりかき取れる。その時のブラシ高さｄと
すると、現像部ブラシ高さｌと同じかそれよりも小でス
クレーパの先端がブラシの高さｄよりも小さい間隙を形
成する。結果として完全にスリーブに塗布された現像剤
をかき取った場合と同様の効果が得られると共に接続ク
レープの場合に生じがちなスリーブの回転負荷の増大
や、スリーブ表面に現像剤が融着する問題は解消され
た。In these processes, the scraper 6 faces the sleeve with a gap equal to or smaller than the spike length of the sleeve at the developing pole. As a result, at the time of development, only the developer whose toner concentration in the uppermost layer that has contributed most to development is reduced can be scraped off by the scraper 6. Assuming that the brush height is d at that time, a gap that is equal to or smaller than the developing unit brush height 1 and the tip of the scraper is smaller than the brush height d is formed. As a result, the same effect as when the developer completely applied to the sleeve is scraped off is obtained, and the rotational load of the sleeve tends to increase in the case of a connection crepe and the developer is fused to the sleeve surface. Has been resolved.
さらに、スクレーパ６は、上スクリユ41から供給された
適正のトナー濃度現像剤を実質的な現像剤溜まり（大き
く循環していても、わずかにに循環してても良い）23と
して保持し、現像スリーブに現像能力の安定したものを
安定供給する役目を果たす。Further, the scraper 6 holds the proper toner concentration developer supplied from the upper scraper 41 as a substantial developer pool (may be largely circulated or may be slightly circulated) 23, and is developed. It plays a role of supplying a stable developing ability to the sleeve.
上・下スクリユの搬送力が大きく異なると下スクリユ側
に現像剤が滞留し、下オケ部からの現像剤のあふれを起
したり上スクリユ側に、現像剤が充満して現像剤の動き
がなくなり、剤の劣化、画質の著しい低下さらに現像器
破壊を生じる危険があるので本実施例では、上スクリユ
41の搬送力を下スクリユ４の搬送力より強くし、かつス
リーブに対向していないスクレーパ端部に下スクリユ側
への開口を設け、上スクリユ側からの余剰現像剤は下ス
クリユ側へ移動可能にした。これにより、溜まり23を安
定形成できる。以上により現像剤閉回路中を１方向に循
環する系でかつ上スクリユ側にも下スクリユ側にも現像
剤が溜まり過ぎることのない平衡状態をより容易に保つ
ことが可能となった。If the conveying force of the upper and lower screws is significantly different, the developer will stay on the lower screw side, causing the developer to overflow from the lower pocket part, and the developer filling the upper screw side, causing the developer to move. In this embodiment, there is a risk that the developer will be deteriorated, the image quality will be significantly deteriorated, and the developing device will be destroyed.
The conveying force of 41 is stronger than that of the lower screw 4, and an opening to the lower screw side is provided at the end of the scraper that does not face the sleeve, and excess developer from the upper screw side can move to the lower screw side. I chose Thereby, the reservoir 23 can be stably formed. As described above, it is possible to more easily maintain the equilibrium state in which the developer circulates in the closed circuit of the developer in one direction and the developer is not excessively accumulated on the upper screw side and the lower screw side.
さらに、スクレーパ６は現像極と同一極性の磁極範囲内
にあることが望ましい（半値巾内にスクレーパ先端を設
定する方より望ましい）。スリーブ回転に対して、磁性
穂は回転しながら進むため、同一極でなければ現像極で
現像に寄与した現像剤のみの表層部かき取りがスクレー
パで行なえないからである。Further, it is desirable that the scraper 6 be within the magnetic pole range having the same polarity as the developing pole (more desirable than setting the scraper tip within the half width). This is because the magnetic brush advances while rotating with respect to the rotation of the sleeve, and therefore the surface layer portion of only the developer that has contributed to the development at the developing pole cannot be scraped off by the scraper unless it has the same pole.
本実施例では、スリーブ回転方向に対してスクレーパよ
り下流側の現像剤（トナー濃度一定の現像剤）の動きを
より活発化させるために、非磁性カツトブレードとスク
レーパの間に、N2（Ｎ極），S2（Ｓ極）の２極をもうけ
かつ夫々現像部の磁極の磁束密度よりも磁束密度を小さ
くした。具体的な数値例は、現像極S1の約半分程度であ
る。このような関係に溜まり23内に発生する磁性不動層
が弱くなり、スリーブ２の回転に応じた現像剤の活発な
動きが生まれるので、より好ましい現像剤帯電の均一化
が達成される。In this embodiment, in order to activate the movement of the developer (developer having a constant toner concentration) on the downstream side of the scraper in the sleeve rotation direction, N 2 (N pole), has a small magnetic flux density than the magnetic flux density of the magnetic poles of the profit and each developing unit two poles of S 2 (S pole). A specific numerical example is about half of the developing pole S 1 . In such a relationship, the magnetic immovable layer generated in the pool 23 becomes weak, and the developer moves actively according to the rotation of the sleeve 2, so that more preferable uniform charging of the developer is achieved.
従って、さらに、トナーへの電荷附与が行なわれること
になる。この場合、溜まり23内に設ける磁極は３つ以上
を含めた複数個が良い。又、本例では、現像部と同極性
の磁極S2をスクレーパ６の先端よりスリーブ回転方向下
流側に位置させることで、スクレーパ６より下流側で現
像に寄与していない適正のトナー濃度の維持した現像剤
（スクレーパでかき取られた後の現像剤）を溜まり23側
へ確実に搬送する搬送力を生み出し、さらに、スクレー
プ下流側の溜まり23内の現像剤の動きを活発化させるの
に役立つ。又、下スクリユ側へ現像剤表面を安定してカ
ツトして供給できる。同極のS1，S2の間のN2極は、現像
極S1と同レベルの磁束密度の強さにし、不動層をより強
く発生させて、現像器下部からのトナーの吹き出し及び
現像剤のもれを防止する。又、図中、20,21は薄いフイ
ルムはマイラによりできており、20はドラムに軽い当接
させドラム上流側へのトナー飛散を防止し、21はスリー
ブ２に軽く当接させ、現像器下部からのトナー飛散を防
止する役目を果たす。特に21はスリーブ接線方向に腹当
り気味に当接させるのが好ましい。Therefore, the charge is further applied to the toner. In this case, a plurality of magnetic poles, including three or more, should be provided in the pool 23. Further, in this example, the magnetic pole S 2 having the same polarity as that of the developing unit is located on the downstream side in the sleeve rotation direction from the tip of the scraper 6 to maintain the proper toner concentration not contributing to the development on the downstream side of the scraper 6. Generates a conveying force that reliably conveys the developed developer (developer after scraped by the scraper) to the pool 23 side, and further helps activate the movement of the developer in the pool 23 on the scrape downstream side. . Further, the developer surface can be stably cut and supplied to the lower screen side. The N 2 pole between S 1 and S 2 of the same pole has a magnetic flux density of the same level as that of the developing pole S 1 to more strongly generate the immobile layer, and blows out toner from the lower part of the developing device and develops it. Prevents drug leakage. Further, in the figure, 20 and 21 are thin films made of mylar, 20 is abutted lightly on the drum to prevent toner scattering to the upstream side of the drum, and 21 is abutted lightly on the sleeve 2 to lower the developing device. It plays the role of preventing the toner from scattering. In particular, 21 is preferably brought into contact with the sleeve in the tangential direction of the sleeve so as to slightly touch it.
さて、このように優れた現像装置でも、不十分な帯電の
直接溜まり23に供給されると現像不良トナーを生じるこ
とがある。従って、本例ではメツシユの付いたトナー補
給口16とスクレーパのスリーブ反対側の開口24を通して
上から新規トナー補給を下スクリユ側にのみに行なって
いる。この時新規トナー案内部材としてのトナー遮蔽板
22は、開口16に近接し、下スクリユ側に向ってトナーを
導くように突出しており、トナーをスクレーパ上部現像
剤溜まり23中に供給させず、確実に開口24を通って下ス
クリユへ導く。この時、開口24には、溜まり23を安定形
成するために余分に供給された現像剤の流れ25が下方に
向って流れるので、流れ25が、実質的なトナー飛散防止
効果を奏するので好ましい。Now, even in such an excellent developing device, if the toner is directly supplied to the reservoir 23 of insufficient charge, the developing failure toner may occur. Therefore, in this example, new toner is replenished only to the lower screw side from above through the toner replenishing port 16 with a mesh and the opening 24 on the opposite side of the scraper sleeve. At this time, a toner shielding plate as a new toner guide member
22 is proximate to the opening 16 and protrudes so as to guide the toner toward the lower screw side, does not supply the toner into the scraper upper developer reservoir 23, and reliably guides it through the opening 24 to the lower screw. At this time, the flow 25 of the developer, which is additionally supplied for stably forming the pool 23, flows downward in the opening 24, so that the flow 25 has a substantial toner scattering prevention effect, which is preferable.
いずれにしても、トナー遮蔽板22は重要であり、もしな
ければスクレーパ上部にトナーが入り、即時的にスリー
ブ供給され、良く攪拌・混合されず十分な電荷が附与さ
れないトナーが現像極上に搬送されてしまう。これによ
り地カブリ、反転カブリ現象が生じてしまうのである。In any case, the toner shield plate 22 is important.If it does not exist, the toner enters the scraper upper part, is immediately supplied to the sleeve, and the toner that is not well agitated and mixed and does not have a sufficient charge is conveyed to the developing pole. Will be done. As a result, the ground fog and the reversal fog phenomenon occur.
下スクリユ側に供給されたトナーは、第１図の現像剤の
動きでスリーブ側に直接供給されずに、上スクリユに搬
送されるのである。この時、スクレーパによりかき取ら
れたトナー不足の現像剤が供給されるので、キヤリア粒
子との接触が確実となる効果も含まって下スクリユ４側
へ供給されたトナーはすべて、下スクリユ４により領域
Ｃに搬送され、十分攪拌・混合されることになるのであ
る。いずれにしても新規トナーが溜まり23に直接供給し
ないことは重要である。The toner supplied to the lower screen side is not directly supplied to the sleeve side due to the movement of the developer in FIG. 1, but is conveyed to the upper screen side. At this time, since the insufficient toner developer scraped off by the scraper is supplied, all the toner supplied to the lower screw 4 side is also included by the lower screw 4 including the effect of ensuring contact with the carrier particles. It is transported to the area C and sufficiently stirred and mixed. In any case, it is important that new toner is not directly supplied to the pool 23.
ここで、図示していないが、領域Ｃの狭い領域を利用し
てトナー濃度検出器が設けられ、攪拌・混合された現像
剤のトナー濃度を逐次検知し、トナー補給攪拌棒12の駆
動を制御している。Here, although not shown, a toner concentration detector is provided by utilizing the narrow region C, and the toner concentration of the agitated and mixed developer is sequentially detected, and the drive of the toner replenishment agitator 12 is controlled. is doing.
以上第１図に示すように現像スリーブの後方に大きなス
ペースを取ることなく十分攪拌・混合され常に一定にト
ナー濃度を保った現像剤がスリーブ軸方向に均一供給さ
れ、濃度ウス、濃度ムラ、地カブリ、反転カブリを完全
になくし耐久においても所期画質を維持することが可能
となったわけである。As described above, as shown in FIG. 1, the developer, which is sufficiently stirred and mixed without taking a large space behind the developing sleeve and always keeps the toner concentration constant, is uniformly supplied in the axial direction of the sleeve. By eliminating fog and reversal fog completely, it is possible to maintain the desired image quality in durability.
但し、トナー補給口を下スクリユ側に設けた場合は現像
剤の溜まりによりトナー補給量が一定にならない欠点が
生じるため、現像剤の溜まりのない空間部にトナー補給
口を設けなければならない。However, if the toner replenishing port is provided on the lower screw side, the toner replenishment amount is not constant due to the developer accumulation. Therefore, the toner replenishing port must be provided in the space where the developer is not accumulated.
上記実施例の上・下スクリユは、リブ付円筒の回転体や
ベルト状回転体でも良く、実質的な搬送手段であれば良
いが、回転して長手方向に強い搬送を行えるものである
ことがより好ましい。The upper and lower screws of the above-mentioned embodiment may be a cylindrical rotating body with ribs or a belt-like rotating body, and may be a substantial conveying means, but they can rotate to perform strong conveying in the longitudinal direction. More preferable.
新規トナー案内部材としては、上記現像剤溜まり部を形
成する構成の装置に対しては、補給用開口16と溜まり部
との間に位置させることが好ましく、現像装置を回転さ
せたりするものでは、開口16を全部覆って、下方搬送手
段まで案内路を形成することが好ましい。案内部材とし
てはモールドの樹脂が良いが、マイラや細かい（トナー
が出ない）メツシユ状のものでもよいが、穴のない平
板、曲板が良い。As a new toner guide member, it is preferable to position it between the replenishment opening 16 and the reservoir with respect to the device configured to form the developer reservoir, and in the case of rotating the developing device, It is preferable to cover the entire opening 16 and form a guide path to the lower conveying means. As the guide member, a mold resin is preferable, but a mylar or a fine mesh member (which does not emit toner) may be used, but a flat plate without holes or a curved plate is preferable.
本考案によれば、案内部材によって、新規現像剤による
地カブリ、反転カブリを防止して、十分な帯電を与える
ことができるので、耐久による画質低下も防止できる。
従って、良質な現像像を長期にわたって形成できるもの
である。According to the present invention, the guide member can prevent the background fog and the reversal fog due to the new developer and can give sufficient charging, so that the deterioration of the image quality due to the durability can be prevented.
Therefore, a high quality developed image can be formed over a long period of time.
第１図は本考案の実施例の全体説明図、第２図（ａ），
（ｂ）は上・下スクリユの部分説明図である。１は像担
持体、２は現像剤担持体、４は下スクリユ、41は上スク
リユ、５は上スクリユ側の隔壁、51は隔壁５の開口部、
６がスクレーパ、７はドクター・ブレード、８はキヤリ
ア返し、９はトナー飛散防止板、10は現像剤、11はトナ
ーホツパー、12はトナー補給用攪拌棒、16はトナー補給
口である。FIG. 1 is an overall explanatory view of an embodiment of the present invention, FIG. 2 (a),
(B) is a partial explanatory view of the upper and lower screw. 1 is an image carrier, 2 is a developer carrier, 4 is a lower screw, 41 is an upper screw, 5 is a partition on the upper screw side, 51 is an opening of the partition 5,
6 is a scraper, 7 is a doctor blade, 8 is a carrier return, 9 is a toner scattering prevention plate, 10 is a developer, 11 is a toner hopper, 12 is a toner replenishing stirring rod, and 16 is a toner replenishing port.
Claims (1)
像剤担持体上の現像剤をかき取るスクレーパと、このス
クレーパより上方に設けられ現像剤担持体にむけて現像
剤を供給する第１現像剤搬送手段と、スクレーパより下
方にホッパー内の新しい現像剤を補給する現像剤補給手
段と、スクレーパより下方に設けられスクレーパにより
かき取られた現像剤と現像剤補給手段によって補給され
た現像剤を第１現像剤搬送手段へ供給する第２現像剤搬
送手段と、を有することを特徴とする現像装置。1. A developer carrying member carrying a developer, a scraper for scraping off the developer on the developer carrying member, and a developer provided above the scraper and directed toward the developer carrying member. The first developer carrying means, the developer replenishing means for replenishing a new developer in the hopper below the scraper, the developer scraped off by the scraper provided below the scraper and the developer replenishing means A second developer transporting means for supplying the developer to the first developer transporting means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986095252U JPH0753089Y2 (en) | 1986-06-20 | 1986-06-20 | Development device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986095252U JPH0753089Y2 (en) | 1986-06-20 | 1986-06-20 | Development device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS632964U JPS632964U (en) | 1988-01-09 |
| JPH0753089Y2 true JPH0753089Y2 (en) | 1995-12-06 |
Family
ID=30959584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986095252U Expired - Lifetime JPH0753089Y2 (en) | 1986-06-20 | 1986-06-20 | Development device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0753089Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1124382A (en) * | 1997-07-03 | 1999-01-29 | Minolta Co Ltd | Developing device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3117296C2 (en) * | 1981-04-30 | 1984-01-19 | Siemens AG, 1000 Berlin und 8000 München | Developer station for developing charge images generated on a charge image carrier |
| JPS58163968A (en) * | 1982-03-24 | 1983-09-28 | Konishiroku Photo Ind Co Ltd | Developing device |
| JPS5921076A (en) * | 1982-07-27 | 1984-02-02 | Nec Corp | Photo receiving semiconductor device |
| JPS6147974A (en) * | 1984-08-16 | 1986-03-08 | Fuji Xerox Co Ltd | Magnetic brush developing device |
-
1986
- 1986-06-20 JP JP1986095252U patent/JPH0753089Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS632964U (en) | 1988-01-09 |
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