JPH038548B2 - - Google Patents
Info
- Publication number
- JPH038548B2 JPH038548B2 JP56165909A JP16590981A JPH038548B2 JP H038548 B2 JPH038548 B2 JP H038548B2 JP 56165909 A JP56165909 A JP 56165909A JP 16590981 A JP16590981 A JP 16590981A JP H038548 B2 JPH038548 B2 JP H038548B2
- Authority
- JP
- Japan
- Prior art keywords
- toner
- magnetic
- carrier
- storage container
- container
- 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
- 230000014759 maintenance of location Effects 0.000 claims description 13
- 238000005086 pumping Methods 0.000 claims description 6
- 239000000696 magnetic material Substances 0.000 claims description 4
- 230000000717 retained effect Effects 0.000 claims description 3
- 108091008695 photoreceptors Proteins 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000969 carrier Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
- G03G15/0806—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller
- G03G15/0808—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller characterised by the developer supplying means, e.g. structure of developer supply roller
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
- G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Magnetic Brush Developing In Electrophotography (AREA)
- Dry Development In Electrophotography (AREA)
Description
【発明の詳細な説明】
本発明は磁性トナーを用いて潜像を現像するた
めの現像装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a developing device for developing a latent image using magnetic toner.
第１図は磁性トナーを用いたコンパクト化した
現像装置の断面図を示す。図において、静電潜像
や磁気潜像を有する像保持ドラムで、このドラム
１に対して磁性トナー２が内部に磁界を有した非
磁性スリーブ３に担持され、ドラム１上の潜像を
現像する。トナー２は現像装置の容器を兼ねるト
ナー収納容器４にあり、自重によりスリーブ３面
に供給される。この収納容器４内にトナーを補給
するときは、上部に円形断面部５に沿つて予め開
口を設けたトナーカートリツジ６を装填し、開口
部６ａが下に向く様に回転させる。 FIG. 1 shows a sectional view of a compact developing device using magnetic toner. In the figure, an image holding drum having an electrostatic latent image or a magnetic latent image is shown. Magnetic toner 2 is carried by a non-magnetic sleeve 3 having an internal magnetic field with respect to this drum 1, and the latent image on the drum 1 is developed. do. The toner 2 is in a toner storage container 4 which also serves as a container for the developing device, and is supplied to the sleeve 3 by its own weight. When replenishing toner into the storage container 4, a toner cartridge 6 having an opening in advance along the circular cross section 5 is loaded and rotated so that the opening 6a faces downward.
上記方式の現像装置では、従来のスリーブを用
いた現像装置の如く、ホツパーからトナー溜め部
にトナーを移し、このトナーをスリーブが磁界に
より汲み上げる方式の装置と比較して大幅に小型
化している。しかし、上記第１図の装置では容器
内のトナー量により現像結果に変化を生じること
がある。更にトナーの消費に伴うトナー補給に際
しては、カートリツジを用いているため、トナー
容器の他にカートリツジのためのスペースも要求
される。 The developing device of the above type is significantly smaller in size than a conventional developing device using a sleeve in which toner is transferred from a hopper to a toner reservoir and a sleeve draws up the toner using a magnetic field. However, in the apparatus shown in FIG. 1, the development result may vary depending on the amount of toner in the container. Furthermore, since a cartridge is used to replenish toner as the toner is consumed, space for the cartridge is also required in addition to the toner container.
本発明の目的は上記従来装置の問題点を解決
し、トナーの収納容器内のトナー量により現像結
果に変化が生じるのを防止し、更にトナー補給を
容易にした極めて小型化して現像装置を提供する
ものである。 An object of the present invention is to solve the problems of the conventional device described above, to prevent changes in development results due to the amount of toner in a toner storage container, and to provide an extremely miniaturized developing device that facilitates toner replenishment. It is something to do.
上記目的を達成する本発明は、内部に固定磁石
を有し、磁力により表面磁性トナーを担持して被
現像面にこのトナーを供給するトナー担持体と、
磁性トナーを収納しトナー担持体とは独立した構
成を有して装置本体に対して着脱可能なトナー収
納容器と、トナー担持体近傍で上記磁極に対向し
て位置し、上記磁極との間に形成される磁界によ
つてトナー担持体との間の間〓部にトナーを滞留
させておく、着磁体又は磁性体のトナー滞留部材
と、上記トナー収納容器内で回転し、上記トナー
滞留部材とトナー担持体間の間〓部にトナーを汲
み上げるトナー汲み上げ手段と、を有し、トナー
担持体はトナーの滞留せしめられた上記間〓部か
ら被現像面にトナーを供給する現像装置である。 To achieve the above object, the present invention includes a toner carrier having a fixed magnet therein, supporting magnetic toner on its surface by magnetic force, and supplying the toner to a surface to be developed;
A toner storage container that stores magnetic toner and has a configuration independent of the toner carrier and is removable from the apparatus main body, and a toner container that is located near the toner carrier and opposite to the magnetic pole, and is located between the magnetic pole and the toner container. a toner retention member made of a magnetized or magnetic material that retains toner in a space between the toner carrier and the toner carrier by a generated magnetic field; and a toner retention member that rotates within the toner storage container and The toner carrier is a developing device that includes a toner pumping means for pumping up the toner in the space between the toner carriers, and the toner carrier supplies the toner to the surface to be developed from the space where the toner is retained.
上記被現像面としては静電潜像を有した感光体
や絶縁体、又は磁気潜像を有した磁性体等があ
る。また、トナー担持体としては磁気手段を内包
した非磁性スリーブや、表面に着磁模様を施した
磁性スリーブ等を用い得る。 The surface to be developed may be a photoreceptor or insulator having an electrostatic latent image, or a magnetic material having a magnetic latent image. Further, as the toner carrier, a non-magnetic sleeve containing magnetic means, a magnetic sleeve with a magnetized pattern on its surface, etc. can be used.
上記構成によりトナー滞溜部材の存在のためト
ナー収納容器からトナー担持体には一定量のトナ
ーが供給されるため、収納容器内のトナー量変化
による現像結果に変化を生じることがない。そし
て、同時にトナー収納容器が本体装置に対して着
脱可能となつているため、この収納容器を交換す
るのみでトナー補給が行え、現像装置にはホツパ
ーの如き付加的な構成は必要としない。従つて、
現像装置が小型化できたのみならず、被現像面に
対して高い位置精度が求められるトナー担持体を
本体装置から取出す必要がないため、現像装置の
位置決めを容易にすることが可能となる。 With the above configuration, a constant amount of toner is supplied from the toner storage container to the toner carrier due to the presence of the toner storage member, so that there is no change in the development result due to a change in the amount of toner in the storage container. At the same time, since the toner container is removably attached to the main unit, toner can be replenished simply by replacing the container, and the developing device does not require any additional structure such as a hopper. Therefore,
Not only can the developing device be made smaller, but it is also possible to position the developing device easily because there is no need to take out the toner carrier, which requires high positional accuracy with respect to the surface to be developed, from the main device.
ところで、上記被現像面に感光体を用いる場
合、感光体の劣化による使用耐久性が問題にな
る。この様な場合、感光体の交換を行なうが、こ
の感光体の耐久度をトナー収納容器内のトナー量
に関連付け、トナーを消費したとき感光体の寿命
が終える様に設定しておき、感光体を本体装置か
ら取出すことにより、同時にトナー収納容器も本
体装置から一体的に取出すことにより、像形成部
の保守が極めて簡易化される。そして、本発明の
構成によれば現像装置の要部でコストも高いトナ
ー担持体部を本体装置を残して消耗品部のみ交換
できるため、経済的でもある。 By the way, when a photoreceptor is used as the surface to be developed, durability in use becomes a problem due to deterioration of the photoreceptor. In such a case, the photoconductor should be replaced, but the durability of the photoconductor should be related to the amount of toner in the toner storage container, and the life of the photoconductor should be set so that the life of the photoconductor ends when the toner is consumed. By taking out the toner storage container from the main unit, and simultaneously taking out the toner storage container from the main unit, maintenance of the image forming section is extremely simplified. Further, according to the configuration of the present invention, it is possible to replace only the consumable part while leaving the main body of the developing device, which is an expensive toner carrier part, which is an important part of the developing device, which is also economical.
以下本発明を一実施例に従つて説明する。 The present invention will be explained below according to one embodiment.
第２図は本発明を適用した電子写真複写機の要
部断面図で、被現像面を構成する感光ドラム７に
対し本発明の現像装置８が対向配置されている。
導電ドラムと表面の光導電層より成るこの感光ド
ラム７は、軸９に軸支されており矢印方向に回転
する。ドラム７の周囲には回転方向にコロナ放電
器１０、原稿像の露光１１、上記現像装置８、転
写用コロナ放電器１２、分離部材１３、そして、
残留トナーを清掃するクリーニング器１４が配設
されている。 FIG. 2 is a sectional view of a main part of an electrophotographic copying machine to which the present invention is applied, in which a developing device 8 of the present invention is disposed opposite to a photosensitive drum 7 constituting a surface to be developed.
This photosensitive drum 7, which is composed of a conductive drum and a photoconductive layer on its surface, is supported by a shaft 9 and rotates in the direction of the arrow. Around the drum 7, in the rotational direction, there are a corona discharger 10, an original image exposure 11, the developing device 8, a transfer corona discharger 12, a separation member 13, and,
A cleaning device 14 for cleaning residual toner is provided.
上記現像装置８の上部には軸１５により固定さ
れた磁気ローラ１６と、そのローラの周囲を矢印
方向に回転する非磁性スリーブ１７及びこのスリ
ーブ１７上のトナー量を均一化するための磁性体
ブレード１８が軸１９を中心に矢印方向に回転す
る枠体２０に取付けられている。そして、この枠
体２０は自重により時計方向に回転し、後述する
トナー収納容器２１に係止してＮ２による磁力に
より磁性体ブレード１８がスリーブ１７の方向に
力を受け図の状態を保つている。また、枠体２０
は磁力に抗して回転させると、枠体２０に設けた
凸部２２が本体側の凹部と噛み合つて、ブレード
１８が容器２１から離れ、且つスリーブ１７も感
光ドラム７面から離れた状態を保つ。 At the top of the developing device 8, there is a magnetic roller 16 fixed by a shaft 15, a non-magnetic sleeve 17 rotating around the roller in the direction of the arrow, and a magnetic blade for making the amount of toner on the sleeve 17 uniform. 18 is attached to a frame body 20 that rotates in the direction of the arrow around a shaft 19. The frame 20 rotates clockwise due to its own weight and is locked to a toner storage container 21, which will be described later, and the magnetic blade 18 is forced in the direction of the sleeve 17 by the magnetic force of N2, thereby maintaining the state shown in the figure. . In addition, the frame body 20
When rotated against magnetic force, the convex portion 22 provided on the frame body 20 engages with the concave portion on the main body side, and the blade 18 is separated from the container 21 and the sleeve 17 is also separated from the surface of the photosensitive drum 7. keep.
上記現像装置８の下部にはトナーを収容する容
器２１があり、この容器は感光ドラムの回転軸方
向にガイド兼支持部材２４に沿つて押し込むこと
により本体に装填、又は引出すことにより本体か
ら離脱する。この容器２１の内側は円形断面を有
し、この内周面に沿つて回転可能な円筒２５が配
設してある。この円筒２５は軸方向に伸びた開口
２５ａを有し、この開口からスリーブに対しトナ
ーを供給したり又は回収したりする。円筒２５は
容器２１の外側に連続するつまみ（図示せず）を
回転させることにより、その位置を変え得る。 At the bottom of the developing device 8, there is a container 21 for storing toner, and this container is loaded into the main body by pushing it along the guide/support member 24 in the direction of the rotation axis of the photosensitive drum, or detached from the main body by pulling it out. . The inside of this container 21 has a circular cross section, and a rotatable cylinder 25 is disposed along the inner peripheral surface. The cylinder 25 has an axially extending opening 25a through which toner is supplied to and collected from the sleeve. The cylinder 25 can be changed in position by rotating a continuous knob (not shown) on the outside of the container 21.
上記容器２１の内側の円筒２５の中心部には、
この円筒の支持軸をも兼ねた回転軸２６があり、
この軸２６には矢印方向に回転するトナー撹拌ア
ーム２７が設けられており、その先端部には100
〜200μmの樹脂シートによるトナー供給部２８が
ある。このアーム２７の回転半径の外側で容器２
１とスリーブ１７との間にはトナー滞溜部材であ
る着磁棒２９が設けてある。上記供給部２８及び
着磁棒２９は、スリーブ１７の全幅に渡りスリー
ブ面と平行に配設されている。 In the center of the cylinder 25 inside the container 21,
There is a rotating shaft 26 that also serves as a support shaft for this cylinder.
This shaft 26 is provided with a toner stirring arm 27 that rotates in the direction of the arrow.
There is a toner supply section 28 made of a resin sheet of ~200 μm. The container 2 is located outside the radius of rotation of this arm 27.
1 and the sleeve 17 is provided with a magnetized rod 29 which is a toner retention member. The supply section 28 and the magnetized rod 29 are arranged parallel to the sleeve surface over the entire width of the sleeve 17.
上記現像装置による感光ドラムの現像について
以下述べる。現像装置が駆動されているときは、
スリーブ１７は感光体の周速に近い速度で回転さ
せる。一方、回転軸２６は上記スリーブ１７の回
転数の1/5〜1/20程度の回転数で回転させると良
いが、この回転数はトナーの汲上げ量によつて決
定すると良い。この汲上げ量が多すぎるとトナー
の飛散をきたし、逆に少なすぎるとスリーブへの
トナー供給量が低下し現像濃度の低下を招いたり
前回の感光体上の画像部によつてスリーブ１７か
ら持ち去られた部分にトナー塗付が十分に行なわ
れず次回の現像の際にゴースト像が現われる。 The development of the photosensitive drum by the above-mentioned developing device will be described below. When the developing device is being driven,
The sleeve 17 is rotated at a speed close to the circumferential speed of the photoreceptor. On the other hand, the rotating shaft 26 is preferably rotated at a rotation speed of about 1/5 to 1/20 of the rotation speed of the sleeve 17, and this rotation speed is preferably determined depending on the amount of toner pumped up. If the amount pumped up is too large, the toner will scatter, and if it is too small, the amount of toner supplied to the sleeve will decrease, leading to a decrease in developing density, or the toner will be removed from the sleeve 17 by the image area on the previous photoreceptor. The toner is not sufficiently applied to the exposed areas, and ghost images appear during the next development.
汲上げられたトナーは磁気ローラ１６の磁極S1
と着磁棒２９とが形成する磁界により、スリーブ
１７とこの着磁棒との間に所定量だけ保持され
る。そして、汲上げにより過剰になつたトナー
は、自重により落下し収納容器内に戻る。この着
磁棒は磁極S1の存在により単なる磁性棒に換える
こともできる。第２図の実施例では、外径約30mm
のスリーブ１７上でS1極により約600ガウス発生
させ、このスリーブ上10mmの間隙を保つて直径３
mmの着磁棒２９を設けている。これによりスリー
ブ上のS1極による磁界は５から６割も増加し、ト
ナーの滞溜量は着磁棒がない場合と比較して５か
ら６割も増加できる。この着磁棒はスリーブ１７
にあまり近過ぎるとトナーが固化するので注意を
要す。この様にスリーブ上に一定量のトナーを保
持しておくことにより、トナー不足による前の現
像像がゴーストとして再生されることがなくな
り、一方、過剰トナーは自重により落下する。 The pumped up toner is applied to the magnetic pole S 1 of the magnetic roller 16.
Due to the magnetic field formed by the sleeve 17 and the magnetized rod 29, a predetermined amount is held between the sleeve 17 and the magnetized rod. Then, the excess toner that has been pumped up falls due to its own weight and returns into the storage container. This magnetized bar can also be replaced with a simple magnetic bar due to the presence of the magnetic pole S1 . In the example shown in Figure 2, the outer diameter is approximately 30 mm.
Approximately 600 Gauss is generated by S 1 pole on the sleeve 17 of
A magnetized rod 29 of mm is provided. As a result, the magnetic field due to the S1 pole on the sleeve increases by 50 to 60%, and the amount of accumulated toner can increase by 50 to 60% compared to the case without the magnetized rod. This magnetized rod is sleeve 17
If it is too close to the toner, the toner will solidify, so be careful. By retaining a certain amount of toner on the sleeve in this manner, a previously developed image will not be reproduced as a ghost due to insufficient toner, while excess toner will fall due to its own weight.
スリーブ１７上に供給されたトナーは、ブレー
ド１８により均一な厚さに規制され、スリーブの
回転により現像位置に至る。このときブレードの
上流側には少量のトナーが滞溜するだけでトナー
の固化は生じない。磁気ローラの磁極N2はブレ
ード１８に対向しており、磁極N1は感光ドラム
に対向している。 The toner supplied onto the sleeve 17 is regulated to a uniform thickness by the blade 18, and reaches the developing position by rotation of the sleeve. At this time, only a small amount of toner accumulates on the upstream side of the blade, and the toner does not solidify. The magnetic roller's magnetic pole N2 faces the blade 18, and its magnetic pole N1 faces the photosensitive drum.
上記構成によりスリーブ１７には常時一定量の
トナーのみが供給されているため、トナー量の変
動による現像結果に変化をきたすことがない。ま
た、トナー収納容器２１は従来の補給用のホツパ
をも兼ねているため、現像装置が極めて小型化と
なつている。なお、磁性トナーの使用によりトナ
ーの汲上げは樹脂フイルムによらず、滞溜部に生
じている磁界よりも弱い磁力を有する棒又は板状
の磁性体であつても良い。また、滞溜部について
も着磁棒に限らず、磁力を有したもしくは有さな
い磁性体の棒又は板状の部材に置換することがで
きる。 With the above configuration, only a constant amount of toner is always supplied to the sleeve 17, so the development result does not change due to fluctuations in the amount of toner. Further, since the toner storage container 21 also serves as a conventional replenishment hopper, the developing device is extremely miniaturized. Note that when magnetic toner is used, the toner is not drawn up by a resin film, but may be drawn up by a bar or plate-shaped magnetic body having a magnetic force weaker than the magnetic field generated in the retention portion. Further, the retention portion is not limited to the magnetized rod, but may be replaced with a magnetic rod or plate-shaped member with or without magnetic force.
上記現像装置に対するトナーの補給方法につい
て以下述べる。 A method of replenishing toner to the developing device will be described below.
収納容器２１内のトナーを使い切つてしまつた
ときは、この容器内にトナーを補給するか、又は
感光ドラムの劣化を考慮してドラム７ごと容器を
交換する。例えば、容器２１のみを交換する場合
について述べると、スリーブ１７を支持する枠体
２０を反時計方向に回転させて、容器からスリー
ブを遠ざけ、凸部２２を凹部に噛合せて固定す
る。そして、第３図の如く容器２１内の円筒２５
を回転させることで、スリーブ１７に対する容器
２１の開口を塞ぎ、同時に着磁棒２９を回転させ
てトナーをスリーブより良好に除去して、ガイド
２４に沿つて容器２１を取出す。そして、次に、
トナーが十分に内包された新たな容器を装填する
か、又は本体装置外で容器２１にトナーを充填し
た後に再び装填する。容器を装填したら枠体２０
を時計方向に回転させ、ブレード１８を容器の一
部に当接させてスリーブ１７とドラム７との位置
を出し、画像形成工程を開始する。なお、第２図
の３３は容器とブレードとの間に設けた弾性体で
トナーの密閉作用をしている。 When the toner in the storage container 21 is used up, either the toner is replenished into the container, or the container is replaced with the drum 7 in consideration of deterioration of the photosensitive drum. For example, when only the container 21 is replaced, the frame 20 supporting the sleeve 17 is rotated counterclockwise to move the sleeve away from the container, and the protrusion 22 is engaged with the recess and fixed. Then, as shown in FIG. 3, the cylinder 25 inside the container 21 is
is rotated to close the opening of the container 21 to the sleeve 17, and at the same time, the magnetized rod 29 is rotated to better remove toner from the sleeve and take out the container 21 along the guide 24. And then,
Either a new container containing enough toner is loaded, or the container 21 is filled with toner outside the main device and then loaded again. After loading the container, frame 20
is rotated clockwise to bring the blade 18 into contact with a portion of the container to position the sleeve 17 and drum 7, and to start the image forming process. Note that 33 in FIG. 2 is an elastic body provided between the container and the blade, which functions to seal the toner.
ところで、第３図の場合、着磁棒２９は円筒２
５の側板に付けられていたが、その他容器側に取
付けても良く、円筒側に固定しても良い。また、
円筒２５は本発明において必須の要件ではなく、
勿論、容器のみを使用も可能であり、円筒は着脱
時のトナーの飛散防止に効果がある。 By the way, in the case of FIG. 3, the magnetized rod 29 is attached to the cylinder 2.
Although it was attached to the side plate of No. 5, it may be attached to other container sides, or it may be fixed to the cylinder side. Also,
The cylinder 25 is not an essential requirement in the present invention;
Of course, it is also possible to use only the container, and the cylinder is effective in preventing toner from scattering during attachment and detachment.
ところで、容器２１内のトナーが全部消費され
る時間と感光ドラムの寿命とを一致させておく場
合は、トナー収納容器のみの交換ではなく、感光
ドラムとともにこの容器を一体構造にして本体装
置から取出し、新たなドラム及び容器とが一体構
造となつているものを装填すれば良い。この場合
も枠体２０は上記同様感光ドラム及び容器から離
れた位置に固定しておく。勿論、ドラムの周囲の
クリーニング器、分離部材、１次又は転写用放電
器は、従来の感光体を取出す場合のように、ドラ
ム７から離したり取出しておく。後者の様にドラ
ムとトナー容器とを一体的に構成するには、感光
ドラム７の両側を側板で支持し、この側板の延長
上にトナー収納容器２１を固設すれば良い。第４
図は感光ドラムとトナー容器とを一体化したもの
の斜視図を示し、図中、３０，３１が側板、３２
が取出し用のハンドルを示す。 By the way, if you want to match the time it takes for all the toner in the container 21 to be consumed with the lifespan of the photosensitive drum, instead of replacing only the toner storage container, it is possible to make this container together with the photosensitive drum into an integral structure and remove it from the main unit. , it is sufficient to load a new drum and container that have an integral structure. In this case as well, the frame 20 is fixed at a position away from the photosensitive drum and the container as described above. Of course, the cleaning devices, separation members, and primary or transfer dischargers around the drum can be separated from or removed from the drum 7, as in the case of conventional photoreceptor removal. In order to integrally configure the drum and the toner container like the latter, both sides of the photosensitive drum 7 may be supported by side plates, and the toner storage container 21 may be fixedly installed on an extension of the side plates. Fourth
The figure shows a perspective view of an integrated photosensitive drum and toner container, in which 30 and 31 are side plates, 32
indicates the eject handle.
第１図は従来の現像装置の断面図、第２図は本
発明の一実施例を示す断面図、第３図はトナー収
納容器の断面斜視図、第４図は一体化したドラム
及び現像装置の斜視図を示す。
図において、７は像担持体である感光ドラム、
１７はトナーを担持するためのスリーブ、２１は
トナー収納容器、２８はトナーの汲上げ部材、２
９はトナーの滞溜部材である着磁棒を示す。
Fig. 1 is a sectional view of a conventional developing device, Fig. 2 is a sectional view showing an embodiment of the present invention, Fig. 3 is a sectional perspective view of a toner storage container, and Fig. 4 is an integrated drum and developing device. A perspective view of the figure is shown. In the figure, 7 is a photosensitive drum which is an image carrier;
17 is a sleeve for carrying toner, 21 is a toner storage container, 28 is a toner pumping member, 2
Reference numeral 9 indicates a magnetized rod which is a toner retention member.
Claims (1)
性トナーを担持して被現像面にこのトナーを供給
するトナー担持体と、磁性トナーを収納しトナー
担持体とは独立した構成を有して装置本体に対し
て着脱可能なトナー収納容器と、トナー担持体近
傍で上記磁極に対向して位置し、上記磁極との間
に形成される磁界によつてトナー担持体との間の
間〓部にトナーを滞留させておく、着磁体又は磁
性体のトナー滞留部材と、上記トナー収納容器内
で回転し、上記トナー滞留部材とトナー担持体間
の間〓部にトナーを汲み上げるトナー汲み上げ手
段と、を有し、トナー担持体はトナーの滞留せし
められた上記間〓部から被現像面にトナーを供給
する現像装置。 ２ 上記トナー滞留部材はトナー収納容器側に固
定されており、トナー収納容器とともに装置本体
に対して着脱する特許請求の範囲第１項に記載の
現像装置。 ３ 内部に固定磁石を有し、磁力により表面に磁
性トナーを担持して被現像面にこのトナーを供給
するトナー担持体と、上記トナー担持体とは独立
した構成を有して装置本体に対して潜像担持体と
ともに着脱可能なトナー収納容器と、トナー担持
体近傍で上記磁極に対向して位置し、上記磁極と
の間に形成される磁界によつてトナー担持体との
間の間〓部にトナーを滞留させておく、着磁体又
は磁性体のトナー滞留部材と、上記トナー収納容
器内で回転し、上記トナー滞留部材とトナー担持
体間の間〓部にトナーを汲み上げるトナー汲み上
げ手段と、を有し、トナー担持体はトナーの滞留
せしめられた上記間〓部から被現像面にトナーを
供給する現像装置。[Scope of Claims] 1. A toner carrier that has a fixed magnet inside, carries magnetic toner on its surface by magnetic force, and supplies this toner to a surface to be developed, and a toner carrier that stores magnetic toner and is independent of the toner carrier. a toner storage container that is removably attached to the main body of the apparatus, and a toner storage container that is located near the toner carrier and faces the magnetic pole, and that is connected to the toner carrier by a magnetic field formed between the magnetic pole and the toner carrier. A toner retention member made of a magnetized or magnetic material that retains toner in the space between the toner retention member and the toner retention member that rotates within the toner storage container and deposits the toner in the space between the toner retention member and the toner carrier. and a toner pumping means for pumping up toner, and the toner carrier supplies the toner to the surface to be developed from the intermediate portion where the toner is retained. 2. The developing device according to claim 1, wherein the toner retention member is fixed to the toner storage container and is detachable from the device body together with the toner storage container. 3. A toner carrier that has a fixed magnet inside, carries magnetic toner on its surface by magnetic force, and supplies the toner to the surface to be developed; between the toner storage container, which is removable together with the latent image carrier, and the toner carrier, which is located near the toner carrier and facing the magnetic pole, due to the magnetic field formed between the toner carrier and the magnetic pole. a toner retention member made of a magnetized or magnetic material that retains toner in a portion thereof; and a toner pumping means that rotates within the toner storage container and pumps up toner to a portion between the toner retention member and the toner carrier. A developing device comprising: a toner carrier that supplies toner to a surface to be developed from the intermediate portion where toner is retained;
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56165909A JPS5866977A (en) | 1981-10-16 | 1981-10-16 | Developing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56165909A JPS5866977A (en) | 1981-10-16 | 1981-10-16 | Developing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5866977A JPS5866977A (en) | 1983-04-21 |
| JPH038548B2 true JPH038548B2 (en) | 1991-02-06 |
Family
ID=15821306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56165909A Granted JPS5866977A (en) | 1981-10-16 | 1981-10-16 | Developing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5866977A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60122974A (en) * | 1983-12-08 | 1985-07-01 | Matsushita Electric Ind Co Ltd | Developing device |
| JP3016877B2 (en) * | 1990-09-06 | 2000-03-06 | 株式会社リコー | Developing device for electrophotographic equipment |
| JP2005292301A (en) * | 2004-03-31 | 2005-10-20 | Ricoh Co Ltd | Development device, process cartridge and image forming apparatus |
| JP4751177B2 (en) * | 2005-10-27 | 2011-08-17 | 株式会社リコー | Developing device and image forming apparatus |
| US20070248385A1 (en) * | 2006-04-24 | 2007-10-25 | Patrick Dougherty | Material supply device |
-
1981
- 1981-10-16 JP JP56165909A patent/JPS5866977A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5866977A (en) | 1983-04-21 |
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