JPH0466037B2 - - Google Patents
Info
- Publication number
- JPH0466037B2 JPH0466037B2 JP58034458A JP3445883A JPH0466037B2 JP H0466037 B2 JPH0466037 B2 JP H0466037B2 JP 58034458 A JP58034458 A JP 58034458A JP 3445883 A JP3445883 A JP 3445883A JP H0466037 B2 JPH0466037 B2 JP H0466037B2
- Authority
- JP
- Japan
- Prior art keywords
- opening
- photosensitive material
- photosensitive
- toner
- 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
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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
- G03G15/10—Apparatus for electrographic processes using a charge pattern for developing using a liquid developer
- G03G15/101—Apparatus for electrographic processes using a charge pattern for developing using a liquid developer for wetting the recording material
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Wet Developing In Electrophotography (AREA)
- Combination Of More Than One Step In Electrophotography (AREA)
Description
【発明の詳細な説明】
本発明は電子写真装置の現像ヘツド部に関し、
液状のトナーの付与による現像後の液切り（以下
スクイズと称する）を効率良くなし得るよう改良
したものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a developing head of an electrophotographic apparatus,
This has been improved so that liquid toner can be efficiently removed after development (hereinafter referred to as "squeeze") by applying liquid toner.
銀塩写真料を感光体とする写真フイルムと異な
り電子写真装置は感光材料の露光、未露光に関係
なく現像後でも定着前であればクリーニングする
ことによつて再使用が可能である。この再使用が
可能であるという特長を活かしロールフイルム状
やフイツシユフイルム状に形成された電子写真感
光材料は、部分的に帯電、露光、現像、定着によ
り画像を記録し、更にこれによつて得た画像を未
記録の部分とともに例えば投影などの用途に供し
た後、未記録の部分に新たな記録を追加していく
マイクロフイルム現像処理装置等に用いられてい
る。 Unlike a photographic film using a silver salt photographic material as a photoreceptor, an electrophotographic device can be reused by cleaning it even after development but before fixing, regardless of whether the photosensitive material is exposed or not. Taking advantage of this reusable feature, electrophotographic materials formed into roll films or fixed films record images by partially charging, exposing, developing, and fixing, and further It is used in a microfilm development processing apparatus, etc., which uses the obtained image together with unrecorded parts for purposes such as projection, and then adds new records to the unrecorded parts.
上述の如き電子写真装置のうち液状のトナーに
より静電潜像を現像する、所謂湿式タイプの電子
写真装置では一駒毎に帯電、露光、現像及び定着
を行なうので、現像処理中あるいは現像処理後感
光材料の画像領域以外にトナーが滲み出ないこと
が好ましい。したがつて、感光材料を現像部から
離して時の処理部に移動する前に余分の現像液を
取り除くスクイズを行なう必要がある。 Among the above-mentioned electrophotographic apparatuses, so-called wet-type electrophotographic apparatuses that develop electrostatic latent images using liquid toner perform charging, exposure, development, and fixing for each frame. It is preferable that the toner does not ooze out other than the image area of the photosensitive material. Therefore, it is necessary to squeeze the photosensitive material to remove excess developer before separating it from the developing section and moving it to the processing section.
液状のトナーを用いた従来技術に係る電子写真
装置が特開昭50−9437号公報に開示されており、
この装置の現像部の基本構成を第１図に基づいて
説明する。同図に示すように、現像ヘツド１には
マスク１ａが備えられており、このマスク１ａは
感光材料２の一駒に対応する広さの開口部１ｂを
介して感光材料２に接している。この結果、感光
材料２の一駒分の感光面２ａは開口部１ｂに臨ん
でおり、この開口部１ｂを介して液状のトナー４
を感光面２ａに付与することにより所定の潜像を
現像する。かかる現像に引き続き感光面２ａに付
着したトナー４のスクイズを行なう必要がある
が、このスクイズも同様に前記開口部１ｂを介し
て感光面２ａに、例えば空気等の気体を付与する
ことにより行なう。そこで、トナー４及び空気を
開口部１ｂまで搬送する必要があるが、この搬送
はタンク５に貯留されているトナー４を真空ポン
プ６で吸い上げるとともに、弁７の開放により大
気中から空気を同様に真空ポンプ６で吸い込むこ
とにより行なつている。即ち、タンク５から現像
ヘツド１の内部に至る流路８、大気に開放されて
いる端部から弁７を通り現像ヘツド１の内部に至
り開口部１ｂの上流で前記流路８に合流する流路
９、開口部１ｂから現像ヘツド１の外部に至り真
空ポンプ６を通つてタンク５に戻る流路１０が形
成されている。 A prior art electrophotographic device using liquid toner is disclosed in Japanese Patent Application Laid-Open No. 1983-9437,
The basic structure of the developing section of this apparatus will be explained based on FIG. As shown in the figure, the developing head 1 is equipped with a mask 1a, which is in contact with the photosensitive material 2 through an opening 1b having a width corresponding to one frame of the photosensitive material 2. As a result, the photosensitive surface 2a of one frame of the photosensitive material 2 faces the opening 1b, and the liquid toner 4 passes through the opening 1b.
is applied to the photosensitive surface 2a to develop a predetermined latent image. Following this development, it is necessary to squeeze the toner 4 adhering to the photosensitive surface 2a, and this squeezing is similarly performed by applying a gas such as air to the photosensitive surface 2a through the opening 1b. Therefore, it is necessary to transport the toner 4 and air to the opening 1b, but this transport involves sucking up the toner 4 stored in the tank 5 with the vacuum pump 6, and also sucking up the toner 4 from the atmosphere by opening the valve 7. This is done by suctioning with a vacuum pump 6. That is, a flow path 8 leads from the tank 5 to the inside of the developing head 1, and a flow passes from the end open to the atmosphere to the inside of the developing head 1 through the valve 7 and joins the flow path 8 upstream of the opening 1b. A flow path 10 is formed which extends from the opening 1b to the outside of the developing head 1, passes through the vacuum pump 6, and returns to the tank 5.
このように上記電子写真装置の現像部では、真
空ポンプ６により吸い上げた液状のトナー４を感
光面２ａに付与することにより所定の潜像を現像
し、引き続き同様に真空ポンプ６により吸い込ん
だ空気を感光面２ａに付与することによりクイズ
を行なう。かかる現像及びスクイズ工程が終了し
た後感光材料２に対する押え板３による押圧が解
除され、感光材料２は次の駒へと駒送りが行なわ
れる。 In this manner, in the developing section of the electrophotographic apparatus, a predetermined latent image is developed by applying the liquid toner 4 sucked up by the vacuum pump 6 to the photosensitive surface 2a, and subsequently, the air sucked in by the vacuum pump 6 is applied to the photosensitive surface 2a. A quiz is performed by applying the information to the photosensitive surface 2a. After the development and squeezing steps are completed, the pressure of the presser plate 3 on the photosensitive material 2 is released, and the photosensitive material 2 is moved to the next frame.
前述の従来技術では液状のトナーを吸引ポンプ
により搬送しているため現像部からの液の滲み出
しはあまりないが、吸引ポンプという高価な吸引
手段を使用しなければならないという欠点を有す
るとともに、スクイズ用の気体を感光面２ａに付
与することにより液状のトナー４のスクイズを行
なつてはいるが、充分には行なわれないという欠
点を有する。このとき時間をかければ充分なスク
イズは可能であるが、今度は単位時間当りの処理
能力が低下するという問題が発生する。 In the above-mentioned conventional technology, liquid toner is transported by a suction pump, so there is little chance of liquid seeping out from the developing section. Although the squeezing of the liquid toner 4 is performed by applying a gas to the photosensitive surface 2a, it has the disadvantage that it is not performed satisfactorily. At this time, sufficient squeezing is possible if time is spent, but this time a problem arises in that the processing capacity per unit time decreases.
本発明は、上記従来技術に鑑み、短時間で充分
なスクイズを行ない得る低コストな電子写真装置
の現像ヘツド部を提供することを目的とする。か
かる目的を達成する本発明は感光材料の駒送りの
際に現像ヘツドの開口部周縁の少なくとも一部と
前記感光材料の感光面との間に形成される僅かな
間隙を介して液を吸引するようにした点をその技
術思想の基礎とするものである。 SUMMARY OF THE INVENTION In view of the above-mentioned prior art, it is an object of the present invention to provide a low-cost developing head for an electrophotographic apparatus that can perform sufficient squeezing in a short period of time. The present invention achieves this object by sucking a liquid through a small gap formed between at least a part of the periphery of the opening of the developing head and the photosensitive surface of the photosensitive material when the photosensitive material is fed frame by frame. This is the basis of its technical philosophy.
尚、本発明の如き電子写真感光材料の一駒分の
感光面に液状トナーを供給することにより、前記
感光面に形成された静電潜像を現像する電子写真
装置の現像ヘツドとしては、特公昭49−23378号、
特開昭49−90948号、特公昭49−27446号、特公昭
51−13415号及び特公昭54−13786号の各公報並び
に米国特許第3820890号明細書に開示があるが、
現像室開口部周縁に減圧を発生させ、液状トナー
を吸引させるという発想は開示されておらず、更
に米国特許第3936854号には現像室の周囲を弾性
部材で２重にシーリングし、現像後２重シーリン
グ部材の間隙より、乾燥風を付与することによ
り、現像液を乾燥させる技術が開示されている
が、この技術も、負圧作用により、駒送りの際に
現像ヘツドの開口部周縁の少なくとも一部と感光
材料との間に形成される僅かな間隙を介して液を
吸引するという技術とは異なるものである。 The developing head of an electrophotographic apparatus that develops an electrostatic latent image formed on the photosensitive surface by supplying liquid toner to the photosensitive surface of one frame of the electrophotographic photosensitive material according to the present invention is particularly suitable. Publication No. 49-23378,
Japanese Patent Publication No. 49-90948, Special Publication No. 49-27446, Special Publication No.
Although it is disclosed in the publications of Japanese Patent Publication No. 51-13415 and Japanese Patent Publication No. 54-13786, as well as the specification of U.S. Patent No. 3820890,
The idea of generating reduced pressure around the opening of the developing chamber and sucking the liquid toner is not disclosed, and US Pat. A technique has been disclosed in which the developer is dried by applying drying air through the gap between the heavy sealing members, but this technique also uses negative pressure to dry at least the periphery of the opening of the developing head during frame feeding. This is different from a technique in which liquid is sucked through a small gap formed between a portion of the photosensitive material and the photosensitive material.
以下本発明の実施例を図面に基づき詳細に説明
する。第２図に示すように、現像ヘツド１１には
マスク１１ａが備えられており、このマスク１１
ａは感光材料１２の一駒に対応する広さの開口部
１１ｂを有して感光材料１２に接している。この
結果、感光材料１２の一駒分の感光面１２ａは開
口部１１ｂに臨んでおり、押え板１３により感光
材料１２を現像ヘツド１１に押圧した状態で前記
開口部１１ｂを介して液状のトナー１４を付与す
ることにより静電潜像を現像した後、前記感光面
１２ａに空気を付与してスクイズを行なう。更に
詳言すると、トナー１４はこれが貯留されている
タンク１５からポンプ１６により汲み上げられト
ナー用流路１７を介して搬送される。一方、スク
イズ用の気体である空気は、一端が大気中に開口
し途中に気体圧送手段１８が介装されている気体
用流路１９を介して搬送される。即ち、トナー１
４及び空気の搬送は前記従来技術の如き吸入方式
に対し圧送方式を採つている。そこで気体用流路
１９には弁２０を設け、トナー圧送時にトナーが
気体用流路１９若しくは気体圧送手段１８の中に
入に込まないようにしてある。感光面１２ａにト
ナーを付与して現像した後の余剰のトナー１４及
びスクイズ後の空気は、現像ヘツド１１内の開口
部１１ｂから排出用流路２１に向かつて形成され
た流出路１１ｄから排出用流路２１を通りタンク
１５に戻される。かくて、ポンプ１６により汲み
上げた液状のトナー１４を感光面１２ａに付与す
ることにより所定の潜像を現像し、引き続いて気
体圧送手段１８により吸入した空気を感光面１２
ａに付与することによりスクイズを行なう。かか
る現像及びスクイズ工程が終了した後感光材料１
２に対する押え板１３による押圧が解除され、感
光材料１２は次の駒へと駒送りが行なわれる。 Embodiments of the present invention will be described in detail below based on the drawings. As shown in FIG. 2, the developing head 11 is equipped with a mask 11a.
A has an opening 11b having a width corresponding to one frame of the photosensitive material 12 and is in contact with the photosensitive material 12. As a result, the photosensitive surface 12a of one frame of the photosensitive material 12 faces the opening 11b, and while the photosensitive material 12 is pressed against the developing head 11 by the presser plate 13, the liquid toner 14 is passed through the opening 11b. After developing the electrostatic latent image by applying , air is applied to the photosensitive surface 12a to perform squeezing. More specifically, the toner 14 is pumped up by a pump 16 from a tank 15 in which it is stored and conveyed through a toner channel 17. On the other hand, air, which is a gas for squeezing, is conveyed through a gas channel 19 that opens into the atmosphere at one end and has a gas pressure feeding means 18 interposed therebetween. That is, toner 1
4. Air is conveyed by a pressure-feeding method, as opposed to the suction method used in the prior art. Therefore, a valve 20 is provided in the gas flow path 19 to prevent toner from entering the gas flow path 19 or the gas pressure feeding means 18 during toner pressure feeding. Excess toner 14 after toner is applied to the photosensitive surface 12a for development and air after squeezing are discharged from an outflow path 11d formed from an opening 11b in the developing head 11 to a discharge flow path 21. It passes through the flow path 21 and is returned to the tank 15. In this way, a predetermined latent image is developed by applying the liquid toner 14 pumped up by the pump 16 to the photosensitive surface 12a, and subsequently, the air sucked in by the gas pressure feeding means 18 is applied to the photosensitive surface 12a.
Squeeze is performed by adding a to a. After the development and squeeze steps are completed, the photosensitive material 1
2 is released from the presser plate 13, and the photosensitive material 12 is moved to the next frame.
本実施例の現像ヘツド１１には更に吸引路１１
ｅが形成してある。この吸引路１１ｅは開口部１
１ｆを介して一端が大気中に開放されるととも
に、途中にトラツプ２２及び減圧手段、例えば吸
引ポンプ２３が介装され大気中に開放されている
吸引用流路２４に他端が連結されている。同時に
吸引路１１ｅの吸引部１１ｆは、開口部１１ｂの
下端１１ｇに現像ヘツド１１と感光材料１２との
間の隙間を介して連通し得るようになつている。
かくて、吸引ポンプ２３の作動時で、同時に感光
材料１２が押え板１３により現像ヘツド１１に押
圧されている時は吸引部１１ｆを介して空気を吹
い込み排出用流路２１を介して大気中に排出して
いるが、感光材料１２の駒送りの際に押え板１３
による感光材料１２の押圧が解除されると開口部
１１ｂの下端１１ｇと感光材１２の間に隙間がで
きるので、この隙間を介して開口部１１ｂ部分に
も吸引ポンプ２３による吸引力が作用する。 The developing head 11 of this embodiment further includes a suction path 11.
e is formed. This suction path 11e is the opening 1
One end is open to the atmosphere via 1f, and the other end is connected to a suction channel 24 which is equipped with a trap 22 and a pressure reducing means, such as a suction pump 23, and is open to the atmosphere. . At the same time, the suction portion 11f of the suction path 11e can communicate with the lower end 11g of the opening 11b through the gap between the developing head 11 and the photosensitive material 12.
Thus, when the suction pump 23 is activated and at the same time the photosensitive material 12 is pressed against the developing head 11 by the holding plate 13, air is blown into the atmosphere through the suction section 11f and discharged through the discharge channel 21. However, when feeding the frame of the photosensitive material 12, the presser plate 13
When the pressure on the photosensitive material 12 is released, a gap is created between the lower end 11g of the opening 11b and the photosensitive material 12, so that the suction force by the suction pump 23 also acts on the opening 11b through this gap.
かかる本実施例においてはトナー１４を付与し
て現像を行ない気体の付与によるスクイズが終了
した後、駒送りのため押え板１３による感光材料
１２の押圧を解除すると、感光材料１２と現像ヘ
ツド１１との間に隙間ができるので、この部分に
吸引ポンプ２３の吸引力が作用し、スクイズによ
り下降し開口部１１ｂの下端１１ｇに溜まつてい
る液滴を吸引し吸引用流路２４、フイルタ機能を
有するトラツプ２２を介して大気中に排出され
る。かかる構成とすることにより感光面１２ａの
余分な液状トナーのスクイズが充分行なわれる。
因に従来技術におけるスクイズでは感光面１２ａ
の１cm2当りに１〜２mg程度の液滴が残つたが、本
実施例によればこれが0.3mg程度となつた。この
とき各部の寸法t1＝0.1〜0.5mm、t2＝0.3〜0.5mm、
また吸引ポンプ２３は−50mmH2O程度のもので
良く、ベーンポンプ、電磁ポンプ、ダイヤフラム
ポンプ、ギヤポンプ、その他の減圧手段により廉
価に構成し得る。 In this embodiment, after the toner 14 is applied and development is completed and the squeeze by gas application is completed, when the pressure on the photosensitive material 12 by the presser plate 13 for frame feeding is released, the photosensitive material 12 and the developing head 11 are separated. Since a gap is created between the two, the suction force of the suction pump 23 acts on this part, and the droplets descend by squeezing and are collected at the lower end 11g of the opening 11b, and the suction channel 24 and the filter function are activated. It is discharged to the atmosphere through a trap 22 having a trap 22. With this configuration, excess liquid toner on the photosensitive surface 12a can be sufficiently squeezed.
Incidentally, in the conventional squeeze, the photosensitive surface 12a
About 1 to 2 mg of droplets remained per 1 cm 2 of the liquid, but according to this example, this amount was reduced to about 0.3 mg. At this time, the dimensions of each part t 1 = 0.1 to 0.5 mm, t 2 = 0.3 to 0.5 mm,
The suction pump 23 may be of the order of -50 mmH 2 O, and can be constructed at low cost using a vane pump, electromagnetic pump, diaphragm pump, gear pump, or other pressure reducing means.
本実施例では吸引ポンプ２３の前にトラツプ２
２を設け、液滴と気体を分離し、吸引ポンプ２３
に液体が流入しない構成としているが、耐溶剤性
ポンプを使用すればあえてトラツプ２２を設ける
必要はなく、液滴を直接タンク１５に戻す構成と
しても良い。 In this embodiment, the trap 2 is installed before the suction pump 23.
2 to separate the droplets and gas, and a suction pump 23
Although the structure is such that liquid does not flow into the tank 15, if a solvent-resistant pump is used, there is no need to provide the trap 22, and the structure may be such that the liquid droplets are directly returned to the tank 15.
第３図は電子写真の各プロセス処理部を一体化
した処理ヘツドを正面から見た時に正面に接する
面のみを記載した前記処理部の一実施例の図面で
ある。同図中３１は帯電／露光室、１１ｂは現
像／スクイズ室、３２は乾燥室、３３は定着室の
各開口部である。本実施例は液状トナー及びスク
イズ用気体を開口部１１ｂの上方から下方に向つ
て流れる構成としているので、吸引部１１ｆは開
口部１１ｂの下流側に設け、更に帯電／露光室側
へのトナー液の滲み出しを防止するため、吸引部
１１ｆを帯電／露光室側端にまで設けた構造とし
てあるが、更に乾燥室側端に設けても良い。スク
イズ用の気体を上方から付与するのではなく側方
から付与する時は、吸引部１１ｆを気体の流れの
下流端に設けるのが効果的である。以上述べたよ
うに吸引部１１ｆは現像／スクイズ室の開口部１
１ｂの下端あるいはスクイズ用気体の流れの下流
端に設けることが効果的であり、更に開口部１１
ｂの他の周縁部に設け、感光材料１２と接するマ
スク１１ａの端に残る液滴を吸引する構造とする
とより高い効果が得られる。 FIG. 3 is a drawing of an embodiment of the processing section, showing only the surface that contacts the front when a processing head in which various processing sections for electrophotography are integrated is viewed from the front. In the figure, 31 is a charging/exposure chamber, 11b is a developing/squeezing chamber, 32 is a drying chamber, and 33 is an opening of a fixing chamber. In this embodiment, the liquid toner and squeeze gas are configured to flow downward from above the opening 11b, so the suction section 11f is provided on the downstream side of the opening 11b, and the toner liquid flows toward the charging/exposure chamber side. In order to prevent oozing out, the structure is such that the suction section 11f is provided up to the end on the side of the charging/exposure chamber, but it may also be provided further on the end on the side of the drying chamber. When squeezing gas is applied from the side instead of from above, it is effective to provide the suction part 11f at the downstream end of the gas flow. As described above, the suction section 11f is the opening 1 of the developing/squeezing chamber.
It is effective to provide the opening 11 at the lower end of the opening 1b or at the downstream end of the squeeze gas flow.
A higher effect can be obtained by providing a structure in which the liquid droplets are provided at the other peripheral edge of the mask 11a and sucking the droplets remaining at the edge of the mask 11a in contact with the photosensitive material 12.
なお、吸引ポンプ２３は原理的には駒送りのた
めの押え板１３による押圧の解除の際のみに前記
間隙部分に吸引力を作用せしめ得るようにすれば
良いが、一般には現像処理中を含めて連続的に運
転していても構わない。また本実施例ではトナー
の送液を加圧ポンプを用いる例で述べたが、従来
の吸引ポンプ等の吸引装置にてトナーの送液を行
ない更にスクイズ後の液滴を吸引するために本発
明の吸引手段を付加する構成としても良いことは
云うまでもない。 In principle, the suction pump 23 may be configured to apply suction force to the gap only when the pressure from the presser plate 13 for frame feeding is released, but in general It doesn't matter if you run it continuously. Furthermore, in this embodiment, the toner is fed using a pressure pump, but the present invention can be used to feed the toner using a suction device such as a conventional suction pump and further suck the droplets after squeezing. Needless to say, a configuration may also be adopted in which a suction means is added.
以上実施例とともに具体的に説明したように本
発明によれば、感光面に対する気体の付与による
スクイズの後、このスクイズにより現像ヘツドの
下部に溜まつた液滴を、駒送りの際に形成される
感光面と現像ヘツドとの間の隙間を介して吸引す
るようにしたので短時間に充分なスクイズを行な
うことができる。 As specifically explained above in conjunction with the embodiments, according to the present invention, after squeezing the photosensitive surface by applying gas, droplets accumulated at the bottom of the developing head due to this squeeze are removed from the liquid droplets that are formed during frame feeding. Since the suction is carried out through the gap between the photosensitive surface and the developing head, sufficient squeezing can be carried out in a short period of time.
第１図は従来技術を示す断面図、第２図は本発
明の実施例を示す断面図、第３図はその処理ヘツ
ドを正面から見た時に正面に接する面のみを記載
した説明図である。
図面中、１は現像ヘツド、１ｂは開口部、１ｅ
は吸引路、１ｇは下端、２は感光材料、１２ａは
感光面、１４はトナー、２３は吸引ポンプであ
る。
FIG. 1 is a sectional view showing a conventional technique, FIG. 2 is a sectional view showing an embodiment of the present invention, and FIG. 3 is an explanatory view showing only the surface that contacts the front when the processing head is viewed from the front. . In the drawing, 1 is a developing head, 1b is an opening, and 1e is
1g is a suction path, 2 is a photosensitive material, 12a is a photosensitive surface, 14 is a toner, and 23 is a suction pump.
Claims (1)
駒分の開口部が形成された現像ヘツドを有し、前
記感光材料を該現像ヘツドに押圧した状態で前記
開口部を介して前記感光面に液状トナーを付与し
て現像した後、前記開口部を介し前記感光面に気
体を付与して前記液状トナーの液切りを一駒毎に
行なう電子写真装置の現像ヘツド部において、少
なくとも前記感光材料の前記現像ヘツドによる押
圧が解除されたとき、前記現像ヘツドの開口部周
縁の少なくとも一部と前記感光材料の感光面との
間隙に負圧が作用する如く減圧手段を設けたこと
を特徴とする電子写真装置の現像ヘツド部。1. A developing head facing the photosensitive surface of the photosensitive material and having an opening for one frame of the photosensitive surface, and with the photosensitive material being pressed against the developing head, the photosensitive material is exposed to the photosensitive material through the opening. In a developing head section of an electrophotographic apparatus, which applies gas to the photosensitive surface through the opening to drain off the liquid toner frame by frame after applying liquid toner to the photosensitive surface and developing the photosensitive surface, at least the photosensitive surface is A pressure reducing means is provided so that when the material is released from being pressed by the developing head, a negative pressure is applied to the gap between at least a part of the periphery of the opening of the developing head and the photosensitive surface of the photosensitive material. The developing head of an electrophotographic device.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3445883A JPS59160154A (en) | 1983-03-04 | 1983-03-04 | Developing head of electrophotographic apparatus |
| US06/564,493 US4613226A (en) | 1982-12-23 | 1983-12-22 | Developing head for electrophotographic apparatus |
| DE8383113080T DE3374232D1 (en) | 1982-12-23 | 1983-12-23 | Developing head for electrophotographic apparatus |
| EP83113080A EP0115628B1 (en) | 1982-12-23 | 1983-12-23 | Developing head for electrophotographic apparatus |
| FR8402387A FR2542108B1 (en) | 1983-03-04 | 1984-02-17 | DEVELOPMENT HEAD FOR ELECTROPHOTOGRAPHIC APPARATUS |
| GB08405492A GB2137905B (en) | 1983-03-04 | 1984-03-02 | Electrophotographic developing head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3445883A JPS59160154A (en) | 1983-03-04 | 1983-03-04 | Developing head of electrophotographic apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59160154A JPS59160154A (en) | 1984-09-10 |
| JPH0466037B2 true JPH0466037B2 (en) | 1992-10-21 |
Family
ID=12414803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3445883A Granted JPS59160154A (en) | 1982-12-23 | 1983-03-04 | Developing head of electrophotographic apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59160154A (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5883036A (en) * | 1981-11-10 | 1983-05-18 | Kinugawa Rubber Ind Co Ltd | Thermoplastic composition |
-
1983
- 1983-03-04 JP JP3445883A patent/JPS59160154A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59160154A (en) | 1984-09-10 |
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