JPH0546945B2 - - Google Patents
Info
- Publication number
- JPH0546945B2 JPH0546945B2 JP59095532A JP9553284A JPH0546945B2 JP H0546945 B2 JPH0546945 B2 JP H0546945B2 JP 59095532 A JP59095532 A JP 59095532A JP 9553284 A JP9553284 A JP 9553284A JP H0546945 B2 JPH0546945 B2 JP H0546945B2
- Authority
- JP
- Japan
- Prior art keywords
- roll
- developer
- developing
- development
- photoreceptor
- 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
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
- G03G15/09—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Magnetic Brush Developing In Electrophotography (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は電子複写機の磁気現像方法に関する。
更に詳しく言えば本発明は現像に使用しないとき
に現像剤を感光体から迅速に離す方法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magnetic development method for an electronic copying machine.
More particularly, the present invention relates to a method for rapidly removing developer material from a photoreceptor when not being used for development.
従来技術
電子複写機において現像機は感光体に近接して
配設されているが、カラー複写機で複数の現像機
が備えられ１色ごとに現像を行なう型式のもので
は、混色および潜像の破壊を防ぐために現像して
いない色の現像剤を感光体から離す必要がある。
そのため現像終了後、感光体に不要な現像剤が接
触しない方法として、現像機本体を感光体から離
す方法および現像ロール上から現像剤を除去する
方法が提案されているが、本発明は後者の方法に
関するものである。Prior Art In electronic copying machines, the developing machine is placed close to the photoreceptor, but in color copying machines that are equipped with multiple developing machines and develop each color separately, color mixing and latent image problems occur. To prevent destruction, it is necessary to separate undeveloped color developer from the photoreceptor.
Therefore, as a method to prevent unnecessary developer from coming into contact with the photoreceptor after development, a method of separating the developing machine body from the photoreceptor and a method of removing the developer from the developing roll have been proposed, but the present invention is directed to the latter method. It is about the method.
特開昭58−100143号公報に記載の方法は、現像
を終了した現像機において、現像ロールを回転さ
せつつ、現像剤を現像ロールに供給するトランス
ポートロールの回転を停止させるか、あるいは現
像ロールを回転させつつトランスポートロールを
逆回転させることによつて現像部から現像剤を除
去する方法である。 The method described in Japanese Patent Application Laid-Open No. 58-100143 is to stop the rotation of a transport roll that supplies developer to the developing roll while rotating the developing roll in the developing machine that has completed the development, or to stop the rotation of the transport roll that supplies the developer to the developing roll. In this method, the developer is removed from the developing section by rotating the transport roll in the opposite direction while rotating the transport roll.
第１図はこの方法に使用されている現像機例の
概略断面図である。現像機１内には現像ロール
３、トランスポートロール４およびブレンダー５
がそれぞれ回転可能に配設されている。そして現
像ロール３に近接して磁気ブラシの高さを規制す
る現像剤規制板６が備えられている。現像が終了
して、トランスポートロール４の回転が停止する
と、現像ロール３には現像剤が供給されず、現像
ロールの回転につれて周面の現像剤は落下して行
くが、規制板６によつて規制され、たまつていた
余分な現像剤が徐々に磁気ロールに供給され磁気
ブラシを形成して行く。したがつて現像ロール３
からすべての現像剤がなくなるまでに時間がかか
り、プロセススピードが速い場合には次の現像時
に現像剤が除去されていないことがあり、未現像
の静電潜像を破壊するなど複写に悪影響を与える
という欠点がある。 FIG. 1 is a schematic cross-sectional view of an example of a developing machine used in this method. Inside the developing machine 1 are a developing roll 3, a transport roll 4, and a blender 5.
are arranged rotatably. A developer regulating plate 6 is provided close to the developing roll 3 to regulate the height of the magnetic brush. When the development is completed and the rotation of the transport roll 4 is stopped, the developer is not supplied to the development roll 3, and as the development roll rotates, the developer on the circumferential surface falls. The accumulated excess developer is gradually supplied to the magnetic roll and forms a magnetic brush. Therefore, the developing roll 3
It takes time for all the developer to be used up, and if the process speed is fast, the developer may not be removed during the next development, which may have a negative impact on copying, such as destroying the undeveloped electrostatic latent image. It has the disadvantage of giving.
発明の目的
本発明の目的は、現像終了後の現像ロールから
短時間で完全に現像剤を除去する現像方法を提供
することにある。OBJECT OF THE INVENTION An object of the present invention is to provide a developing method that completely removes the developer from the developing roll in a short period of time after completion of development.
発明の構成
本発明は、感光体に近接して回転する現像ロー
ルと、現像ロールに近接して回転しながら現像剤
を供給するためのトランスポートロールとを有
し、トランスポートロールの近傍に配設された現
像剤規制板のみにより現像剤の供給量を規制する
電子複写機の現像機において、現像終了直後トラ
ンスポートロールを停止させて、現像ロール上の
現像剤が除去された後に現像ロールを停止させる
磁気現像方法である。Structure of the Invention The present invention includes a developing roll that rotates close to a photoreceptor, and a transport roll that supplies developer while rotating close to the developing roll, and is arranged near the transport roll. In a developing machine of an electronic copying machine that regulates the amount of developer supplied only by a developer regulating plate installed, the transport roll is stopped immediately after development is completed, and the developer roll is removed after the developer on the developing roll is removed. This is a magnetic development method that stops the process.
本発明では現像が終了した直後にトランスポー
トロールのみを停止させ、現像ロールは現像剤が
供給されない状態で回転を続ける。したがつてト
ランスポートロール及びブレンダーが停止した時
から、新たな磁気ブラシは形成されず、またそれ
まで磁着していた現像剤の磁気ブラシは感光体を
摺擦した後に、現像ロール内の磁石の作用により
落下して除去される。そして、現像ロール周面に
はまつたく現像剤が付着していない状態となつた
時に、現像ロールの回転を停止させる。 In the present invention, only the transport roll is stopped immediately after the development is completed, and the development roll continues to rotate without being supplied with developer. Therefore, from the time the transport roll and blender stop, no new magnetic brush is formed, and the magnetic brush of the developer that had been magnetized until then rubs against the photoreceptor, and then the magnet in the developing roll It falls and is removed by the action of Then, when there is no developer attached to the peripheral surface of the developing roll, the rotation of the developing roll is stopped.
このように本発明の方法によれば現像終了後の
感光体は現像剤の付着してない現像ロール面と対
向することになるので、転写あるいは停止中に感
光体表面に現像剤が付着することはない。 In this way, according to the method of the present invention, the photoreceptor after development is opposed to the developing roll surface to which no developer is attached, so that developer does not adhere to the surface of the photoreceptor during transfer or stop. There isn't.
実施例
以下に添付図面を参照しながら、本発明方法の
実施例を説明する。Examples Examples of the method of the present invention will be described below with reference to the accompanying drawings.
第２図は本発明の方法を実施する現像機例の現
像時の概略側面図である。現像機１内には現像ロ
ール３、トランスポートロール４、ブレンダー５
が回転可能に備えられており、現像ロール３が感
光体２に近接して配設されている。現像ロール
３、トランスポートロール４およびブレンダー５
は矢印の方向に回転しており、現像が始まると、
ブレンダー５によつて撹拌された現像剤がトラン
スポートロール４によつて現像ロール３に搬送さ
れる。トランスポートロール４の外周近傍にはト
ランスポートロール４によつて搬送される現像剤
の量を規制するための現像剤規制板６が備えられ
ており、現像剤は現像ロール３に均一に搬送され
て、現像ロール３に磁着し、磁気ブラシを形成す
る。そして現像ロール３上の磁気ブラシが感光体
２を摺擦して感光体表面の静電潜像を顕像化した
直後、トランスポートロール４及びブレンダー５
を停止させて現像ロール３への現像剤の供給を中
止する。このとき現像ロール３はなお回転を続
け、現像ロール３上の残つていた磁気ブラシは
徐々に落下して行く。所定の時間後に現像ロール
３上に磁気ブラシはすべて除去され、感光体２に
現像剤が接しない状態となつたときに現像ロール
３を停止させる。従来の方法では現像ロール上の
現像剤がすべて除去されるまでに約１秒を要した
が、この発明の方法では約0.2〜0.3秒で現像剤が
完全に除去することができる。 FIG. 2 is a schematic side view of an example of a developing machine implementing the method of the present invention during development. Inside the developing machine 1 are a developing roll 3, a transport roll 4, and a blender 5.
is rotatably provided, and a developing roll 3 is disposed close to the photoreceptor 2. Developing roll 3, transport roll 4 and blender 5
is rotating in the direction of the arrow, and when development begins,
The developer stirred by the blender 5 is conveyed to the developing roll 3 by the transport roll 4. A developer regulating plate 6 is provided near the outer periphery of the transport roll 4 to regulate the amount of developer transported by the transport roll 4, and the developer is uniformly transported to the developing roll 3. Then, it is magnetically attached to the developing roll 3 to form a magnetic brush. Immediately after the magnetic brush on the developing roll 3 rubs the photoreceptor 2 and visualizes the electrostatic latent image on the surface of the photoreceptor, the transport roll 4 and the blender 5
, and the supply of developer to the developing roll 3 is stopped. At this time, the developing roll 3 continues to rotate, and the magnetic brush remaining on the developing roll 3 gradually falls. After a predetermined time, all the magnetic brushes on the developing roll 3 are removed and the developing roll 3 is stopped when the developer is no longer in contact with the photoreceptor 2. In the conventional method, it took about 1 second to remove all the developer on the developing roll, but with the method of the present invention, the developer can be completely removed in about 0.2 to 0.3 seconds.
このように本発明の方法では現像終了後、短時
間で感光体には現像剤は接触しなくなり、感光体
表面に現像剤が付着することはない。特にカラー
複写機のように複数の現像機を備えている装置に
おいては、個々の現像機の現像終了時に、上述し
た本発明の方法で現像ロールを停止させることに
よつて、未現像の静電潜像が破壊させることはな
い。 As described above, in the method of the present invention, the developer does not come into contact with the photoreceptor in a short time after the development is completed, and the developer does not adhere to the surface of the photoreceptor. Particularly in an apparatus equipped with a plurality of developing machines such as a color copying machine, by stopping the developing roll using the method of the present invention described above when the development of each developing machine is completed, it is possible to remove the undeveloped electrostatic charge. The latent image cannot be destroyed.
発明の効果
本発明によれば、現像終了後、現像ロールには
現像剤が供給されず、ロール周面に付着していた
現像剤がすべて落下した後に現像ロールが停止す
るので、現像終了後の転写中あるいは停止中の感
光体に現像剤が接触することはない。また、現像
ロール上の現像剤を除去する時間が短縮され、従
つて複写サイクルが短くなり複写速度が速くな
る。Effects of the Invention According to the present invention, after the development is completed, no developer is supplied to the development roll, and the development roll is stopped after all the developer attached to the circumferential surface of the roll has fallen. The developer does not come into contact with the photoreceptor during transfer or during transfer. Also, the time to remove the developer on the developer roll is reduced, thus shortening the copying cycle and increasing the copying speed.
第１図は従来の現像装置の概略側面図、第２図
および第３図は本発明方法を実施するための装置
の概略側面図であり、第２図は現像中の状態を表
わし第３図は現像後の状態を表わす。
図中符号：１……現像機；２……感光体；３…
…現像ロール；４……トランスポートロール；５
……ブレンダー；６……現像剤規制板。
FIG. 1 is a schematic side view of a conventional developing device, FIGS. 2 and 3 are schematic side views of the device for carrying out the method of the present invention, FIG. 2 shows the state during development, and FIG. represents the state after development. Codes in the figure: 1...Developing machine; 2...Photoreceptor; 3...
...Development roll; 4...Transport roll; 5
...Blender; 6...Developer regulation plate.
Claims (1)
現像ロールに近接して回転しながら現像剤を供給
するためのトランスポートロールとを有し、前記
トランスポートロールの近傍に配設された現像剤
規制板のみにより現像剤の供給量を規制する電子
複写機の現像機において、 現像終了直後に前記トランスポートロールを停
止させて、前記現像ロール上の現像剤が除去され
た後に前記現像ロールを停止させることを特徴と
する電子複写機における磁気現像方法。[Scope of Claims] 1. A developing roll that rotates close to the photoconductor, and a transport roll that rotates close to the developing roll and supplies a developer, the transport roll being close to the transport roll. In a developing machine of an electronic copying machine in which the amount of developer supplied is regulated only by a developer regulating plate disposed on the developing machine, the transport roll is stopped immediately after development is completed, and the developer on the developing roll is removed. 1. A magnetic development method for an electronic copying machine, characterized in that the development roll is stopped after the development is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59095532A JPS60239783A (en) | 1984-05-15 | 1984-05-15 | Magnetic developing method of electronic copying machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59095532A JPS60239783A (en) | 1984-05-15 | 1984-05-15 | Magnetic developing method of electronic copying machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60239783A JPS60239783A (en) | 1985-11-28 |
| JPH0546945B2 true JPH0546945B2 (en) | 1993-07-15 |
Family
ID=14140164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59095532A Granted JPS60239783A (en) | 1984-05-15 | 1984-05-15 | Magnetic developing method of electronic copying machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60239783A (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4053218A (en) * | 1975-11-10 | 1977-10-11 | Xerox Corporation | Development system |
| JPS6020751B2 (en) * | 1977-04-25 | 1985-05-23 | 株式会社リコー | magnetic brush developing device |
| JPS5555370A (en) * | 1978-10-20 | 1980-04-23 | Ricoh Co Ltd | Magnetic brush developing unit |
| JPS592740B2 (en) * | 1980-01-14 | 1984-01-20 | 新日本製鐵株式会社 | Chemical containers with excellent corrosion resistance and high temperature resistance against embrittlement during use |
-
1984
- 1984-05-15 JP JP59095532A patent/JPS60239783A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60239783A (en) | 1985-11-28 |
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