JPH05333691A - Developer circulation method for magnetic brush developing device - Google Patents
Developer circulation method for magnetic brush developing deviceInfo
- Publication number
- JPH05333691A JPH05333691A JP4137024A JP13702492A JPH05333691A JP H05333691 A JPH05333691 A JP H05333691A JP 4137024 A JP4137024 A JP 4137024A JP 13702492 A JP13702492 A JP 13702492A JP H05333691 A JPH05333691 A JP H05333691A
- Authority
- JP
- Japan
- Prior art keywords
- developer
- auger
- magnetic brush
- carrier
- 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.)
- Granted
Links
Landscapes
- Magnetic Brush Developing In Electrophotography (AREA)
- Dry Development In Electrophotography (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、電子写真複写装置に用
いられる磁気ブラシ現像装置の現像剤循環方法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a developer circulating method for a magnetic brush developing device used in an electrophotographic copying machine.
【0002】[0002]
【従来の技術】図を用いて電子写真複写装置に用いられ
る磁気ブラシ現像装置を説明する。図1は、磁気ブラシ
現像装置の断面図であり、図2は図1のA−A線の断面
で示した正面概略断面図である。2. Description of the Related Art A magnetic brush developing device used in an electrophotographic copying machine will be described with reference to the drawings. 1 is a cross-sectional view of the magnetic brush developing device, and FIG. 2 is a schematic front cross-sectional view taken along the line AA of FIG.
【0003】図1および図2に示されるように、電子写
真複写装置に用いられる磁気ブラシ現像装置1は、複数
のオーガーの少なくとも2本の主たるオーガー2,5を
隔壁4を介して上下に配置し、各々が相反する方向に現
像剤9を搬送するように構成され、いずれか一方のオー
ガー2に隣接して固定配置された所定の分布に磁力を有
しその外周が回転するように成された現像剤担持体7を
有しており、隣接する一方のオーガー2により搬送され
た現像剤9を該現像剤坦持体7へ供給し、剤担持体上の
現像剤が感光体10を現像し、残余の現像剤は前述他方
のオーガー5へ還元されるように構成されている。この
ような磁気ブラシ現像装置1は、現像剤担持体7より他
方のオーガー5に戻された現像剤9が、前述した一方の
オーガー2へ循環搬送され、そこから再び剤担持体7へ
の供給が行われる為、現像剤9が剤担持体に留まること
なく新たな現像剤に取り替えられるため現像剤中のトナ
ー濃度が変化せず、安定して均一な現像剤の循環が形成
され均一な画像を得ることができるという利点があっ
た。(特公平3−16026号公報参照)As shown in FIGS. 1 and 2, in a magnetic brush developing device 1 used in an electrophotographic copying machine, at least two main augers 2 and 5 of a plurality of augers are arranged vertically with a partition wall 4 interposed therebetween. However, each of them is configured to convey the developer 9 in opposite directions, and has a magnetic force in a predetermined distribution fixedly arranged adjacent to any one of the augers 2 so that its outer periphery rotates. Has a developer carrier 7 and supplies the developer 9 carried by the adjacent one auger 2 to the developer carrier 7, and the developer on the developer carrier develops the photoconductor 10. However, the remaining developer is configured to be returned to the other auger 5 described above. In such a magnetic brush developing apparatus 1, the developer 9 returned from the developer carrier 7 to the other auger 5 is circulated and conveyed to the one auger 2 described above, and is supplied to the developer carrier 7 again. Therefore, since the developer 9 is replaced with a new developer without remaining on the developer carrier, the toner concentration in the developer does not change, and a stable and uniform circulation of the developer is formed to form a uniform image. There was an advantage that can be obtained. (See Japanese Patent Publication No. 3-16026)
【0004】しかしながら、従来の磁気ブラシ現像装置
にあっては、オーガー2,5の現像剤搬送能力、すなわ
ち、供給側現像剤溜り3に現像剤を供給する能力が剤担
持体7の現像剤搬送能力、すなわち、該供給側現像剤溜
りから現像剤が該剤坦持体を介して、撹拌側現像剤溜り
へと搬送される能力に比べて小さく構成されているため
に、供給側現像剤溜りに撹拌側現像剤溜り6から搬送さ
れる現像剤の量よりも多くの現像剤の量が現像剤坦持体
に供給され、坦持体7から撹拌側現像剤溜り6に戻され
る残余の現像剤の量が、下オーガー5によって供給側現
像剤溜り3に搬送供給される現像剤の量に比べて多くな
るので、現像剤9が撹拌側現像剤溜り6のオーガー5の
下流側に片寄って溜り易く、前述のような残余の現像剤
を剤担持体から剥離し再循環させることを妨げることに
より、剤担持体に形成される磁気ブラシのトナー濃度が
長手方向にわたって不均一になるという不具合を生じて
いた。However, in the conventional magnetic brush developing device, the developer carrying capacity of the augers 2 and 5, that is, the ability to supply the developer to the supply side developer reservoir 3 is carried by the developer carrying member 7. Since the capacity, that is, the ability of the developer to be conveyed from the supply side developer reservoir to the stirring side developer reservoir via the agent carrier, is smaller than the supply side developer reservoir, Is supplied to the developer carrier more than the amount of the developer conveyed from the stirring side developer reservoir 6, and the remaining development is returned from the carrier 7 to the stirring side developer reservoir 6. Since the amount of the developer is larger than the amount of the developer conveyed and supplied to the supply side developer reservoir 3 by the lower auger 5, the developer 9 is deviated to the downstream side of the auger 5 in the stirring side developer reservoir 6. It is easy to accumulate and removes the residual developer as described above from the agent carrier. And by interfering with recirculating the toner density of the magnetic brush formed on the carrying member has occurred a problem that becomes uneven along the longitudinal direction.
【0005】特にカラー複写機の場合は大面積を現像す
ることが多い為、このような磁気ブラシのトナー濃度が
長手方向にわたって不均一となることを招き易く、画像
の質の低下を招来し大きな問題となった。Particularly in the case of a color copying machine, since a large area is often developed, the toner density of such a magnetic brush is likely to become non-uniform in the longitudinal direction, resulting in deterioration of image quality. It became a problem.
【0006】[0006]
【発明が解決しようとする課題】本発明は、前記のよう
な問題を解決し、磁気ブラシ現像装置内の現像剤を円滑
に循環させることができ、現像剤坦持体上に常に安定し
たトナー濃度の均一な磁気ブラシを形成させる方法を提
供することを目的とする。SUMMARY OF THE INVENTION The present invention solves the above problems and allows a developer in a magnetic brush developing device to be smoothly circulated, and a toner that is always stable on a developer carrier. An object is to provide a method for forming a magnetic brush having a uniform concentration.
【0007】[0007]
【課題を解決するための手段】図1および図2に示す如
く、隔壁4によって上下に配置された供給側現像剤溜り
3および撹拌側現像剤溜り6内にそれぞれ配置され、各
々相反する方向に現像剤9を搬送する上オーガー2およ
び下オーガー5を有する磁気ブラシ現像装置1におい
て、現像剤9は下オーガー5により撹拌側現像剤溜り6
内を送られた後撹拌側現像剤溜り6の端部11に衝突
し、矢印dに示されるように上オーガー2が配置された
供給側現像剤溜り3へと押し上げ補給され、上オーガー
2によって前記下オーガー5とは反対方向に搬送され
る。このとき、供給側現像剤溜り3に補給された現像剤
9は、矢印aで示すように該現像剤溜りに隣接する現像
剤担持体7へ供給された後穂立規制部材8によって該坦
持体上に所定の穂立ちに規制された磁気ブラシを形成
し、感光体10上に形成された静電潜像を可視化現像す
る。その後現像剤は、矢印bに示されるように該坦持体
から剥離され撹拌側現像剤溜り6へ戻される。現像剤坦
持体7上に供給されなかった余剰の現像剤9は、前述と
反対側の位置12で撹拌側現像剤溜り6に矢印dに示さ
れるように自然に落下して、下オーガー6へと戻され再
循環される。As shown in FIG. 1 and FIG. 2, the supply side developer reservoir 3 and the stirring side developer reservoir 6 are arranged one above the other by a partition wall 4, respectively, in opposite directions. In the magnetic brush developing device 1 having the upper auger 2 and the lower auger 5 that convey the developer 9, the developer 9 is agitated by the lower auger 5 and the developer pool 6 on the stirring side.
After being fed inside, it collides with the end portion 11 of the developer pool 6 on the stirring side, and is pushed up and replenished to the developer pool 3 on the supply side where the upper auger 2 is arranged as shown by an arrow d, and the upper auger 2 It is conveyed in the opposite direction to the lower auger 5. At this time, the developer 9 replenished in the supply-side developer reservoir 3 is carried by the trailing edge regulating member 8 supplied to the developer carrier 7 adjacent to the developer reservoir as shown by an arrow a. A magnetic brush regulated to have a predetermined spike is formed on the body, and the electrostatic latent image formed on the photoconductor 10 is visualized and developed. After that, the developer is peeled from the carrier as shown by the arrow b and returned to the developer pool 6 on the stirring side. The surplus developer 9 not supplied onto the developer carrier 7 naturally drops into the developer pool 6 on the stirring side at the position 12 on the opposite side to the above as shown by the arrow d, and the lower auger 6 It is returned to and recycled.
【0008】このような磁気ブラシ現像装置において、
剤担持体7の現像剤搬送能力(W1g/sec)を、前
記規制部材8によって規制される量(Ag/cm2)と剤
担持体の半径(rcm)、回転数(Rrps)及び剤担持体
長(lcm)の積 W1=A×2πr×R×l で表したとき、撹拌側現像剤溜り6の端部11領域にお
いて下オーガー5によって押し上げられる現像剤の量、
すなわち、オーガーの現像剤搬送能力(Wdg/se
c)を W1〈Wd≦3W1 となるよう、オーガー径、オーガー回転数および、オー
ガーピッチを設定することによって、現像剤坦持体7上
に常に安定して濃度の均一な磁気ブラシを形成する。In such a magnetic brush developing device,
The developer carrying capacity (W 1 g / sec) of the agent carrier 7 is regulated by the regulating member 8 (Ag / cm 2 ), the radius of the agent carrier (rcm), the rotation speed (Rrps) and the agent. When the product W 1 = A × 2πr × R × l of the carrier length ( 1 cm) is represented, the amount of the developer pushed up by the lower auger 5 in the end 11 region of the developer pool 6 on the stirring side,
That is, the developer conveying capacity (Wdg / se
By setting the auger diameter, the auger rotation number, and the auger pitch so that c) becomes W 1 <Wd ≦ 3W 1 , a magnetic brush having a stable and uniform concentration is always formed on the developer carrier 7. To do.
【0009】[0009]
【実施例】以下、本発明の構成を実施例に基づいて説明
する。本発明の構成において、現像剤搬送能力Wdを測
定するにあたり、現像剤担持体7を停止させ、上下オー
ガー2,5のみ回転させ現像装置1内の現像剤9の循環
が安定したところで、図2に示されるように供給側現像
剤溜り3から撹拌側現像剤溜り6に供給される現像剤の
流れCを現像剤搬送能力Wdとして測定した結果を図3
に示す。タイプIのオーガーは、直径23.5mm、ピッ
チ18mmで、金属板を螺旋状に巻いたものであり、タイ
プIIのオーガーはタイプIのオーガーのピッチを30mm
としたものである。オーガーの現像剤搬送能力はオーガ
ーの回転数に比例することが理解できる。なお30g/
secに示される破線は、現像剤坦持体7の現像剤搬送
能力W1を示している。EXAMPLES The structure of the present invention will be described below based on examples. In the configuration of the present invention, in measuring the developer carrying capacity Wd, the developer carrier 7 is stopped and only the upper and lower augers 2 and 5 are rotated to stabilize the circulation of the developer 9 in the developing device 1. As shown in FIG. 3, the result of measuring the flow C of the developer supplied from the supply-side developer reservoir 3 to the stirring-side developer reservoir 6 as the developer transport capacity Wd is shown in FIG.
Shown in. The type I auger has a diameter of 23.5 mm and a pitch of 18 mm, and is a spirally wound metal plate. The type II auger has a pitch of 30 mm for the type I auger.
It is what It can be understood that the developer carrying capacity of the auger is proportional to the rotation speed of the auger. 30g /
The broken line indicated by sec indicates the developer carrying capacity W 1 of the developer carrier 7.
【0010】ここで上記の各々のオーガーを用いた現像
装置を、現像剤担持体7の現像剤搬送能力(W1g/s
ec)が30g/secとなるような条件下において、
連続的に剤担持体7の全長に渡って均一に現像させてト
ナーを消費させ、剤担持体7上の現像剤9のトナー濃度
を3ケ所の領域に分割して測定した。このとき剤担持体
を3等分し、各々現像剤9が上オーガーのある供給側現
像剤溜り3から下オーガー5のある撹拌側現像剤溜り6
へと落下する側12より、順次、領域1、領域2、領域
3とした。また、現像されているトナー重量を測定し、
現像装置内のトナーが均一に消費されたものとし、トナ
ー濃度の減少を計算し、各々の測定値と比較した。Here, the developing device using each of the above-mentioned augers is equipped with a developer carrying capacity (W 1 g / s) of the developer carrying member 7.
Under the condition that ec) is 30 g / sec,
The toner was consumed by continuously developing it uniformly over the entire length of the agent carrier 7, and the toner concentration of the developer 9 on the agent carrier 7 was measured by dividing it into three regions. At this time, the agent carrier is divided into three equal parts, and each developer 9 is supplied from the supply side developer reservoir 3 with the upper auger to the stirring side developer reservoir 6 with the lower auger 5.
Area 1, area 2, and area 3 are sequentially arranged from the side 12 that falls into the area. Also, measure the weight of the toner being developed,
Assuming that the toner in the developing device was uniformly consumed, the decrease in toner concentration was calculated and compared with each measured value.
【0011】(実施例1)タイプIのオーガー(18mm
ピッチ)を回転数227rpmで回転したときには、オ
ーガーの現像剤搬送能力Wdは、26.5g/secで
あった。すなわち、この実施例のオーガーの現像剤搬送
能力Wdは剤担持体の現像剤搬送能力W1=30g/s
ec以下であった。(Example 1) Type I auger (18 mm
When the pitch) was rotated at a rotation speed of 227 rpm, the developer transporting capacity Wd of the auger was 26.5 g / sec. That is, the developer transporting capacity Wd of the auger of this embodiment is the developer transporting capacity W 1 of the agent carrier W = 30 g / s
It was ec or less.
【0012】(実施例2)タイプIIのオーガー(30mm
ピッチ)を回転数227rpmで回転した場合のオーガ
ーの現像剤搬送能力Wdは、44g/secで剤担持体
7の現像剤搬送能力W1=30g/secを超えてい
る。(Embodiment 2) Type II auger (30 mm
The developer carrying capacity Wd of the auger when the pitch) is rotated at a rotation speed of 227 rpm is 44 g / sec and exceeds the developer carrying capacity W 1 = 30 g / sec of the developer carrier 7.
【0013】(実施例3)タイプIのオーガー(18mm
ピッチ)を用い、回転数を400rpmとしてオーガー
の現像剤搬送能力Wdを42g/secとした。この実
施例のオーガーの現像剤搬送能力Wdは剤坦持体の現像
剤搬送能力W1を超えている。(Embodiment 3) Type I auger (18 mm
Pitch), the rotation speed was 400 rpm, and the developer transporting capacity Wd of the auger was 42 g / sec. The developer transport capacity Wd of the auger of this embodiment exceeds the developer transport capacity W 1 of the agent carrier.
【0014】(実施例4)タイプIIのオーガーを用いて
回転数を500rpmにあげ、オーガーの現像剤搬送能
力を極めて大きなものとして現像装置内の現像剤を観察
した。この時のオーガーの現像剤搬送能力Wdは,90
g/secで剤担持体7の現像剤搬送能力W1=30g
/secの3倍を超えていた。(Example 4) Using a type II auger, the number of revolutions was increased to 500 rpm, and the developer in the developing device was observed with the developer conveying ability of the auger being extremely large. The developer transport capacity Wd of the auger at this time is 90
Developer carrying capacity W 1 = 30 g of the agent carrier 7 in g / sec
It was more than 3 times / sec.
【0015】[0015]
【発明の効果】各実施例の効果は以下のようであった。The effects of each embodiment are as follows.
【0016】(実施例1)実施例1のように、オーガー
の現像剤搬送能力Wdが剤坦持体の現像剤搬送能力W1
よりも小さいときには、トナー消費時におけるトナー濃
度の測定結果は、図4に示す如く、現像剤が溜り易い下
オーガー5の下流となる領域2、領域3において、現像
時間が長くなる、すなわち、連続してトナーを消費して
いくに連れ極度に剤担持体上のトナー濃度が低下してい
る。このことから、領域2,領域3では、撹拌側現像剤
溜り6下流側では、堆積している現像剤によってトナー
の消費された現像済みの現像剤が現像剤坦持体7から剥
離しにくくなり、剤担持体上の現像剤の入れ替わりが円
滑に行なわれず、同じ現像剤の一部が連続的に剤担持体
上に溜っていることが理解できる。これは、感光体10
上で現像された画像の濃度が十分でないことを意味し、
均一な画像を得ることができないと云う不都合を生じ
る。(Embodiment 1) As in Embodiment 1, the developer carrying capacity Wd of the auger is equal to the developer carrying capacity W 1 of the agent carrier.
When it is smaller than the above, the measurement result of the toner density at the time of toner consumption shows that the developing time becomes long in the regions 2 and 3 which are downstream of the lower auger 5 where the developer is likely to accumulate, that is, the continuous development, as shown in FIG. Then, as the toner is consumed, the toner concentration on the agent carrier is extremely reduced. From this, in the regions 2 and 3, on the downstream side of the stirring-side developer reservoir 6, the developed developer whose toner has been consumed by the accumulated developer is less likely to be peeled off from the developer carrier 7. It can be understood that the replacement of the developer on the agent carrier is not smoothly performed, and a part of the same developer is continuously accumulated on the agent carrier. This is the photoconductor 10.
Meaning that the density of the image developed above is not sufficient,
The inconvenience occurs that a uniform image cannot be obtained.
【0017】(実施例2)実施例2のように、オーガー
の現像剤搬送能力Wdが現像剤坦持体の現像剤搬送能力
W1より十分に大きいときには、トナー消費テスト結果
は、図5に示すとおりで、連続してトナーを消費しても
時間の経過にともなって均質にトナーが消費され、剤担
持体7全域において良好なトナー濃度を示し、現像剤が
円滑に循環されていることが理解できる。この現像方法
によれば、感光体上に現像された画像の濃度は現像剤坦
持体の長手方向にわたって均質な画像を得ることができ
る。(Embodiment 2) As in Embodiment 2, when the developer carrying capacity Wd of the auger is sufficiently larger than the developer carrying capacity W 1 of the developer carrier, the toner consumption test result is shown in FIG. As shown in the drawing, even if the toner is continuously consumed, the toner is uniformly consumed over time, a good toner concentration is exhibited in the entire area of the agent carrier 7, and the developer is smoothly circulated. It can be understood. According to this developing method, it is possible to obtain an image in which the density of the image developed on the photoreceptor is uniform over the longitudinal direction of the developer carrier.
【0018】(実施例3)実施例3のように、オーガー
の現像剤搬送能力Wdが現像剤坦持体の現像剤搬送能力
W1より十分に大きいときには、実施例2と同様な結果
が得られた。(Embodiment 3) As in Embodiment 3, when the developer carrying capacity Wd of the auger is sufficiently larger than the developer carrying capacity W 1 of the developer carrier, the same results as in Embodiment 2 are obtained. Was given.
【0019】(実施例4)実施例4に示されるように、
オーガーの現像剤搬送能力Wdを現像剤坦持体の現像剤
搬送能力W1より極めて大きく(Wd>3W1)したとき
には、上オーガー2の上流側、すなわち押し上げ運ばれ
てきた現像剤9が最初に剤担持体7に供給される領域
(領域3)に現像剤が著しく片寄って溜っており、供給
側現像剤溜りの上流端部11に、現像剤が高圧力で詰め
込まれていることが観察され、また、現像装置の駆動力
が大きくなっていた。このことから、現像剤へのストレ
スや現像装置におけるペアリング等装置の耐久性、信頼
性への影響を合わせ考えると、オーガーの現像剤搬送能
力(Wd)が極端に大きいことは不都合を生じ好ましく
ない。現像剤への過度のストレスは、トナーの帯電性能
を劣化させる。したがって、装置の駆動力は小さい方が
好ましく、本実施例においても剤坦持体の現像剤搬送能
力W1の3倍程以下にオーガーの現像剤搬送能力Wdを
設定する必要がある。以上説明したように、本発明内容
によって、常に円滑な現像剤の循環が行われる為、剤担
持体に安定して均一な磁気ブラシを形成することがで
き、本発明による現像装置による電子写真装置では、安
定して均一な濃度の画質を達成する。(Embodiment 4) As shown in Embodiment 4,
When the developer carrying capacity Wd of the auger is significantly larger than the developer carrying capacity W 1 of the developer carrier (Wd> 3W 1 ), the developer 9 which has been pushed up and carried upstream of the upper auger 2 is first. It is observed that the developer is remarkably biased and accumulated in the region (region 3) supplied to the developer carrier 7, and the developer is packed at a high pressure in the upstream end portion 11 of the supply-side developer reservoir. In addition, the driving force of the developing device is increased. From this fact, considering the stress on the developer and the effects on the durability and reliability of the device such as pairing in the developing device, it is preferable that the auger has an extremely large developer transporting capacity (Wd). Absent. Excessive stress on the developer deteriorates the charging performance of the toner. Therefore, it is preferable that the driving force of the apparatus is small, and in this embodiment also, it is necessary to set the developer transporting capacity Wd of the auger to about 3 times or less the developer transporting capacity W 1 of the agent carrier. As described above, according to the contents of the present invention, since the developer is constantly circulated smoothly, it is possible to form a stable and uniform magnetic brush on the agent carrier, and the electrophotographic apparatus according to the present invention. Then, a stable and uniform image quality is achieved.
【図1】 磁気ブラシ現像装置の断面図。FIG. 1 is a sectional view of a magnetic brush developing device.
【図2】 図1に示す磁気ブラシ現像装置のオーガーの
配置及び現像剤の流れを示す正面該略断面図。2 is a schematic front sectional view showing the arrangement of an auger and the flow of developer in the magnetic brush developing device shown in FIG.
【図3】 所定のオーガー構成による現像剤搬送能力W
dの測定結果を示す特性図。FIG. 3 is a developer transport capacity W with a predetermined auger configuration
The characteristic view which shows the measurement result of d.
【図4】 現像時間と現像ロール上のトナー濃度の変化
を示す特性図。FIG. 4 is a characteristic diagram showing changes in developing time and toner density on a developing roll.
【図5】 現像時間と現像ロール上のトナー濃度の変化
を示す特性図。FIG. 5 is a characteristic diagram showing changes in developing time and toner concentration on a developing roll.
1.磁気ブラシ現像装置、2.上オーガー、3.供給側
現像剤溜り、4.隔壁、5.下オーガー、6.撹拌側現
像剤溜り、7.現像剤坦持体、8.規制部材、9.現像
剤、10.感光体、11.撹拌側現像剤溜りの下流側端
部、12.供給側現像剤溜りの下流側端部1. Magnetic brush developing device, 2. Upper auger, 3. Supply side developer reservoir, 4. Partition wall, 5. Lower auger, 6. Agitator side developer pool, 7. Developer carrier, 8. Regulating member, 9. Developer, 10. Photoreceptor, 11. 12. The downstream end of the agitating developer pool, 12. Downstream end of developer reservoir
───────────────────────────────────────────────────── フロントページの続き (72)発明者 加藤 正則 神奈川県海老名市本郷2274番地 富士ゼロ ックス株式会社海老名事業所内 (72)発明者 金子 伸太郎 神奈川県海老名市本郷2274番地 富士ゼロ ックス株式会社海老名事業所内 (72)発明者 矢加部 豊 神奈川県海老名市本郷2274番地 富士ゼロ ックス株式会社海老名事業所内 (72)発明者 倉本 新一 神奈川県海老名市本郷2274番地 富士ゼロ ックス株式会社海老名事業所内 (72)発明者 新田 達也 神奈川県海老名市本郷2274番地 富士ゼロ ックス株式会社海老名事業所内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Masanori Kato 2274 Hongo, Ebina, Ebina, Kanagawa Fuji Xerox Co., Ltd.Ebina business office (72) Shintaro Kaneko 2274, Hongo, Ebina, Kanagawa Fuji Xerox Co., Ltd. Ebina business (72) Inventor Yutaka Yakabe 2274 Hongo, Ebina City, Kanagawa Prefecture Fuji Xerox Co., Ltd.Ebina Works (72) Inventor Shinichi Kuramoto 2274 Hongo, Ebina City, Kanagawa Fuji Xerox Co., Ltd. Ebina Business Office (72) Invention Tatsuya Nitta 2274 Hongo, Ebina City, Kanagawa Prefecture Fuji Xerox Co., Ltd.
Claims (1)
オーガーを上下に配置し、現像剤が、前述オーガーによ
り撹拌用現像剤溜りと供給用現像剤溜りの間を循環搬送
されるとともに、前述供給用現像剤溜りに配置されたオ
ーガーの一方にり隣接する固定された磁石を有する現像
剤担持体へ供給され、その後撹拌用現像剤溜りに配置さ
れた他のオーガーへ剥離移動するように構成された磁気
ブラシ現像装置の現像剤循環方法において、前述オーガ
ーの現像剤搬送能力(単位時間あたりに運ばれる現像剤
の量)が現像剤担持体の現像剤搬送能力よりも高く3倍
以下であることを特徴とする磁気ブラシ現像装置の現像
剤循環方法。1. Two augers are arranged one above the other so that the respective conveying directions are opposite to each other, and the developer is circulated and conveyed between the agitating developer reservoir and the supplying developer reservoir by the auger. , Is supplied to a developer carrier having a fixed magnet adjacent to one of the augers arranged in the supply developer reservoir, and then is peeled and moved to another auger disposed in the stirring developer reservoir. In the developer circulating method of the magnetic brush developing device configured as described above, the developer carrying capacity of the auger (the amount of developer carried per unit time) is higher than the developer carrying capacity of the developer carrier and is 3 times or less. And a method of circulating a developer in a magnetic brush developing device.
Priority Applications (1)
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JP04137024A JP3104722B2 (en) | 1992-05-28 | 1992-05-28 | Developer circulating device and developer circulating method for magnetic brush developing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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JP04137024A JP3104722B2 (en) | 1992-05-28 | 1992-05-28 | Developer circulating device and developer circulating method for magnetic brush developing device |
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JPH05333691A true JPH05333691A (en) | 1993-12-17 |
JP3104722B2 JP3104722B2 (en) | 2000-10-30 |
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JP04137024A Expired - Lifetime JP3104722B2 (en) | 1992-05-28 | 1992-05-28 | Developer circulating device and developer circulating method for magnetic brush developing device |
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