JPS6337392B2 - - Google Patents
Info
- Publication number
- JPS6337392B2 JPS6337392B2 JP55116771A JP11677180A JPS6337392B2 JP S6337392 B2 JPS6337392 B2 JP S6337392B2 JP 55116771 A JP55116771 A JP 55116771A JP 11677180 A JP11677180 A JP 11677180A JP S6337392 B2 JPS6337392 B2 JP S6337392B2
- Authority
- JP
- Japan
- Prior art keywords
- toner
- developing
- printing
- image
- master
- 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
Links
- 238000004140 cleaning Methods 0.000 claims description 16
- 238000012546 transfer Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 8
- 239000000843 powder Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 210000000078 claw Anatomy 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
- G03G21/0005—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge for removing solid developer or debris from the electrographic recording medium
- G03G21/0064—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge for removing solid developer or debris from the electrographic recording medium using the developing unit, e.g. cleanerless or multi-cycle apparatus
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2215/00—Apparatus for electrophotographic processes
- G03G2215/06—Developing structures, details
- G03G2215/0634—Developing device
- G03G2215/0636—Specific type of dry developer device
- G03G2215/0648—Two or more donor members
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2221/00—Processes not provided for by group G03G2215/00, e.g. cleaning or residual charge elimination
- G03G2221/0005—Cleaning of residual toner
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、電子写真装置、特に電子写真複写の
原理を応用した印刷装置、即ち静電印刷装置に於
けるクリーニング兼用現像装置に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrophotographic apparatus, and more particularly to a cleaning/developing device in an electrophotographic printing apparatus, that is, an electrostatic printing apparatus.
電子写真方式により印刷を行うことは古くから
知られている。例えば米国特許第2576047号に於
けるゼロプリンテイング方式、あるいは特公昭43
−1554の電子印写装置等である。これは静電写真
方法によつて、光導電板上に粉像を形成させて融
着または定着させ、光導電板上に非感光性の絶縁
性像図形、つまり印刷マスターを形成させ、次に
この印刷マスターを一様に帯電し、さらに一様に
光を照射する。それにより電荷は非感光性の像区
域上にのみ保持されて、感光性部分では放電され
るから、一部分荷電された上記板に帯電した粉末
を付着させて粉像を形成し、粉像を適当な像支持
体上に転写する方法で、以上の工程を反復させる
ものである。 Printing by electrophotography has been known for a long time. For example, the zero printing method in U.S. Patent No. 2,576,047, or the
-1554 electronic printing devices, etc. This is done by forming a powder image on a photoconductive plate and fusing or fixing it to form a non-photosensitive insulating image figure, that is, a printing master, on the photoconductive plate by an electrostatographic method, and then This printing master is uniformly charged and then uniformly irradiated with light. The charge is thereby retained only on the non-photosensitive image areas and discharged on the photosensitive areas, so that a charged powder is deposited on the partially charged plate to form a powder image and the powder image is This is a method of transferring the image onto a suitable image support, and the above steps are repeated.
特に特公昭43−1554には第１図に示されるごと
くの装置が示されている。第１図に於いて１は回
転ドラムで、その周面に抑え爪を有し、感光紙１
０を支持する様になつている。回転ドラム１を囲
んで周囲にはクリーニング装置８、帯電器４、一
様露光ランプ１３、現像機５、及び転写コロトロ
ン６、感光紙１０上のトナー像を定着する赤外線
定着器７、等が設置されている。 In particular, Japanese Patent Publication No. 43-1554 shows a device as shown in FIG. In Fig. 1, numeral 1 is a rotating drum, which has a presser claw on its circumferential surface, and a photosensitive paper 1
It seems to support 0. A cleaning device 8, a charger 4, a uniform exposure lamp 13, a developing device 5, a transfer corotron 6, an infrared fixing device 7 for fixing the toner image on the photosensitive paper 10, etc. are installed surrounding the rotating drum 1. has been done.
印刷マスターの作成は感光紙１０が回転ドラム
１に巻きつき支持された後、帯電器４で帯電さ
れ、さらに原稿照明ランプ１４で照明された原稿
台３上の原稿は、投影レンズ２を介して感光紙１
０上に投影され、静電潜像を形成する。次に潜像
は現像機５で顕像化され、赤外線定着器７でトナ
ー像は感光紙１０上に溶融定着され、印刷マスタ
ーが形成される。 To create a print master, the photosensitive paper 10 is wound around the rotating drum 1 and supported, and then charged with the charger 4.The original on the original platen 3, which is illuminated with the original illumination lamp 14, is then projected through the projection lens 2. Photosensitive paper 1
0 to form an electrostatic latent image. Next, the latent image is visualized by a developing device 5, and the toner image is fused and fixed onto photosensitive paper 10 by an infrared fixing device 7, thereby forming a printing master.
上記印刷マスターを用いた多数枚の静電印刷は
次の様にして行なわれる。感光紙上のトナー像を
有する印刷マスターは帯電器４で帯電され、さら
に一様露光ランプ１３で一様全面露光される。一
様に帯電された感光紙１０上の電荷は、不感性で
かつ非光導電性のトナー像部分のみ残して一様露
光によつて流出する。従つてトナー像部分のみ電
荷を有した印刷マスターが形成され、現像機５に
よつて顕像化される。次に転写紙１１が回転ドラ
ム１の回転と同期して転写部へ送られ、転写コロ
トロン６によつて印刷マスター上のトナー像が転
写紙に転写され、さらに定着装置９によつて定着
画像となり、排紙トレイに導びかれて複写物を得
る。 Electrostatic printing of a large number of sheets using the printing master described above is performed in the following manner. A printing master having a toner image on photosensitive paper is charged by a charger 4, and further exposed uniformly over the entire surface by a uniform exposure lamp 13. The charge on the uniformly charged photosensitive paper 10 is drained by uniform exposure leaving only the toner image portions that are insensitive and non-photoconductive. Therefore, a printing master is formed in which only the toner image portion has an electric charge, and is visualized by the developing device 5. Next, the transfer paper 11 is sent to the transfer section in synchronization with the rotation of the rotary drum 1, and the toner image on the print master is transferred to the transfer paper by the transfer corotron 6, and then becomes a fixed image by the fixing device 9. , and are guided to the paper output tray to obtain copies.
一方、転写後の印刷マスター上の残留トナーは
クリーニング装置８によつてクリーニングされ、
一回の印刷サイクルが終了す。その後、必要とさ
れる複写物の枚数だけ印刷サイクルが繰り返され
る。 On the other hand, residual toner on the print master after transfer is cleaned by a cleaning device 8,
One print cycle ends. The printing cycle is then repeated for the number of copies required.
しかしながら、この様な静電印刷機では、多量
の複写印刷物をとるので印刷マスター上の残留ト
ナーを除去するクリーニング装置内には、大量の
使用済のトナーが堆積してしまい、使用済トナー
の廃却等の保守点検が必要となる。又、他の従来
技術の中にはこの問題に対し、現像機にクリーニ
ング機能を付与して、クリーニング専用装置の除
去をはかる方法もある。そして、この様な従来の
クリーニング兼用現像装置を使用するに当つて
は、１枚の複写物をとる為に回転ドラムを２回転
させ、現像とクリーニングを交互に行なうこと、
あるいは現像装置に印加されるバイアス電圧を現
像時とクリーニング時で変えることがなされてき
た。 However, since such electrostatic printing machines produce a large number of copies, a large amount of used toner accumulates in the cleaning device that removes residual toner from the printing master, and the used toner is discarded. Maintenance and inspection such as removal will be required. In addition, among other conventional techniques, there is a method to solve this problem by providing a cleaning function to the developing machine, thereby eliminating the need for a dedicated cleaning device. When using such a conventional cleaning/developing device, the rotating drum is rotated twice in order to take one copy, and developing and cleaning are performed alternately.
Alternatively, the bias voltage applied to the developing device has been changed between developing and cleaning.
しかしながら、この方法は装置が複雑になる
上、２回転で１複写物しか得られないので高速複
写には向かないなどの欠点があつた。 However, this method has disadvantages in that it requires a complicated apparatus and is not suitable for high-speed copying because only one copy can be obtained in two revolutions.
本発明の目的は、印刷マスター上の残留トナー
のクリーニング効果を有する現像装置を提供し、
かつクリーニング専用装置を不用とした１回転１
複写物を得ることが出来る印刷装置を提供するこ
とにあり、その構成は光導電板上にトナー像を固
着してなる印刷マスターを形成し、この印刷マス
ターを帯電、一様露光し、現像して得た印刷マス
ター上のトナー像を転写してなる静電印刷に於い
て、複数本の現像ロールを具備した現像機を用
い、第１番目の現像ロールのトナー含有量を他の
現像ロールのトナー含有量より低減せしめて用い
ることにより主に第１のロールで前回の印刷サイ
クルの残留トナーを除去し他のロールで新トナー
による現像をなしうるものである。 An object of the present invention is to provide a developing device having the effect of cleaning residual toner on a printing master,
1 revolution without the need for special cleaning equipment
The purpose is to provide a printing device that can obtain copies, and its configuration is to form a printing master by fixing a toner image on a photoconductive plate, charge the printing master, uniformly expose it to light, and develop it. In electrostatic printing, which involves transferring a toner image on a printing master obtained by a process, a developing machine equipped with multiple developing rolls is used, and the toner content of the first developing roll is compared with that of the other developing rolls. By using a lower amount of toner than the toner content, residual toner from the previous printing cycle can be mainly removed in the first roll, and development can be performed with new toner in the other rolls.
以下に本発明のクリーニング兼用現像装置を第
２図に基づいて詳しく説明する。 The cleaning/developing device of the present invention will be explained in detail below with reference to FIG.
光導電性シート１０上にトナー像が固着された
印刷マスターは回転ドラム１上に支持される。 A printing master with a toner image affixed to a photoconductive sheet 10 is supported on a rotating drum 1 .
第１回目の印刷サイクルで、帯電、一様露光、
現像、転写を経た印刷マスター上には残留トナー
像がある。この残留トナー像は転写コロトロン及
び第２回転目の帯電処理を受けて、印刷マスター
の静電像と同極性に帯電しており、結果として印
刷マスターに対する残留トナーの付着力は弱まつ
ている。 In the first printing cycle, charging, uniform exposure,
There is a residual toner image on the print master that has been developed and transferred. This residual toner image is charged to the same polarity as the electrostatic image of the print master by the transfer corotron and second rotation charging process, and as a result, the adhesion of the residual toner to the print master is weakened.
第２回目の印刷サイクルでの現像に於いて、図
では２本の現像ロールを示すが、複数本の現像ロ
ールのうち進入側の１番目の現像ロール１５の担
持する現像剤中のトナー含有量を他のロール１６
のそれに比して低減せしめることにより印刷マス
ター上の付着力の弱まつた残留トナーは第１のロ
ール１５によつて掻き落されると同時に少々新し
いトナーが静電像に付着する。次にその他の現像
ロール１６により、正規の濃度になるべく新しい
トナーによつて現像が施され、転写紙に転写され
て、その後定着される。 In the development in the second printing cycle, although two developing rolls are shown in the figure, the toner content in the developer carried by the first developing roll 15 on the entrance side among the plurality of developing rolls. the other roll 16
The residual toner whose adhesion on the print master has been weakened by reducing the adhesion compared to that of 1 is scraped off by the first roll 15, and at the same time, a slightly new toner adheres to the electrostatic image. Next, the other developing roll 16 develops the toner to the normal density using as new toner as possible, transfers it to transfer paper, and then fixes it.
本発明では、第１番目の現像ロール１５の担持
する現像剤のトナー含有量を低減させる方法とし
て第１の現像ロール１５上の現像剤を規制部材１
８によつて均一な現像剤量に調整し、次に第１の
現像ロール１５に対しバイアスを印加したトナー
ピツクアツプロール１９と接触させ、そしてピツ
クアツプロール上にトナーを移行させ、結果とし
て第１の現像ロール１５上の現像剤中のトナー含
有量を低減せしめる。トナーピツクアツプロール
１９に付着したトナーはスクレーパー２０によつ
て除去される。 In the present invention, as a method for reducing the toner content of the developer carried by the first developing roll 15, the developer on the first developing roll 15 is transferred to the regulating member 1.
8 to adjust the amount of developer to be uniform, then the first developing roll 15 is brought into contact with the toner pick-up roll 19 to which a bias is applied, and the toner is transferred onto the pick-up roll. Toner content in the developer on the developing roll 15 is reduced. The toner adhering to the toner pick-up roll 19 is removed by a scraper 20.
以下のごとく本発明にあつては、他の現像ロー
ルに対しトナー含有量を低減せしめた現像剤を担
持する第１番目の現像ロールを用意することによ
つて、クリーニング専用装置を不用とし、かつ１
回転１複写物を得ることが出来るものである。 As described below, the present invention eliminates the need for a dedicated cleaning device by providing the first developing roll that carries a developer with a reduced toner content compared to the other developing rolls. 1
It is possible to obtain a one-rotation copy.
第１図は、電子印写装置の概略断面図、第２図
は、本発明クリーニング兼用現像装置。
図中符号、１……回転ドラム、２……投影レン
ズ、３……原稿台、４……帯電器、５……現像
機、６……転写コロトロン、７……赤外線定着
器、８……クリーニング装置、９……定着装置、
１０……光導電性シート、１１……転写紙、１２
……排紙トレイ、１３……一様露光ランプ、１４
……原稿照明ランプ。
FIG. 1 is a schematic sectional view of an electronic printing device, and FIG. 2 is a cleaning and developing device of the present invention. Symbols in the figure: 1... Rotating drum, 2... Projection lens, 3... Document table, 4... Charger, 5... Developer, 6... Transfer corotron, 7... Infrared fixing device, 8... cleaning device, 9...fixing device,
10... Photoconductive sheet, 11... Transfer paper, 12
... Paper output tray, 13 ... Uniform exposure lamp, 14
...Manuscript illumination lamp.
Claims (1)
有し、印刷マスターの進入側の１番目の現像ロー
ルが他の残る現像ロールよりトナー付着量を少な
くしてなることを特徴とするクリーニング兼用現
像装置。1. A cleaning/developing device in which an electrostatic printing device has a plurality of developing rolls, and the first developing roll on the entry side of the printing master has a smaller amount of toner adhesion than the other remaining developing rolls. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55116771A JPS5741677A (en) | 1980-08-25 | 1980-08-25 | Cleaning-developing-device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55116771A JPS5741677A (en) | 1980-08-25 | 1980-08-25 | Cleaning-developing-device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5741677A JPS5741677A (en) | 1982-03-08 |
| JPS6337392B2 true JPS6337392B2 (en) | 1988-07-25 |
Family
ID=14695314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55116771A Granted JPS5741677A (en) | 1980-08-25 | 1980-08-25 | Cleaning-developing-device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5741677A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0677166B2 (en) * | 1983-01-20 | 1994-09-28 | 株式会社東芝 | Image forming device |
| US4494521A (en) * | 1983-04-04 | 1985-01-22 | Hoyt/Easton Archery Co. | Archery bow having bow limb assembly and adjustment |
| US5752146A (en) * | 1995-12-08 | 1998-05-12 | Brother Kogyo Kabushiki Kaisha | Electrophotographic type image forming device providing positive charge to toners |
-
1980
- 1980-08-25 JP JP55116771A patent/JPS5741677A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5741677A (en) | 1982-03-08 |
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