JPS61256366A - Image forming device - Google Patents
Image forming deviceInfo
- Publication number
- JPS61256366A JPS61256366A JP60099158A JP9915885A JPS61256366A JP S61256366 A JPS61256366 A JP S61256366A JP 60099158 A JP60099158 A JP 60099158A JP 9915885 A JP9915885 A JP 9915885A JP S61256366 A JPS61256366 A JP S61256366A
- Authority
- JP
- Japan
- Prior art keywords
- picture quality
- image quality
- image
- fixing device
- normal
- 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.)
- Pending
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
- G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fixing For Electrophotography (AREA)
- Fax Reproducing Arrangements (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、記録シート上に形成された未定着粉体像を記
録シート上に定着する通常定着装置と、これにより定着
された画質を向上する画質向上装置とを備えた画像形成
装置に関するものである。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a general fixing device that fixes an unfixed powder image formed on a recording sheet onto the recording sheet, and a fixing device that improves the quality of the fixed image thereby. The present invention relates to an image forming apparatus including an image quality improvement device.
一般に、記録シート上に粉体像（以下、トナー像と称す
る）を形成しこれを加熱または加圧定着する型式の電子
写真複写装置その他の画像形成装置は単一の定着装置し
か備えていない。そのため、厚手の記録シート或いはＯ
ＨＰ用シート等の定着性の劣る特殊な記録シートに定着
を行う場合には、加熱定着用ローラの温度を調整する等
の付加的手段を備えていた。Generally, electrophotographic copying machines and other image forming apparatuses that form a powder image (hereinafter referred to as a toner image) on a recording sheet and fix it by heating or pressure are equipped with only a single fixing device. Therefore, please use a thick recording sheet or
When fixing is performed on a special recording sheet with poor fixing properties, such as a HP sheet, additional means such as adjusting the temperature of the heat fixing roller are provided.
特に、ＯＨＰ用シートのカラーコピーは通常定着状態で
あるとトナー表面の凹凸のため投影光が屈折散乱し、有
彩色投影画像が得られず不具合を生じていた。In particular, when a color copy of an OHP sheet is in a normal fixing state, projection light is refracted and scattered due to the unevenness of the toner surface, resulting in a problem in that a chromatic color projection image cannot be obtained.
本発明の目的は以上の欠点を解決し、記録シートの質に
応じて選択的に画質を向上し、ＯＨＰ用シートの場合に
おいても有彩色投影画像を得ることができ、又、コピー
の画像濃度向上をも得ることのできる画像形成装置を与
える事にある。The purpose of the present invention is to solve the above-mentioned drawbacks, improve the image quality selectively according to the quality of the recording sheet, make it possible to obtain a chromatic color projection image even in the case of an OHP sheet, and improve the image density of copies. The object of the present invention is to provide an image forming apparatus that can also provide improvements.
本発明による画像形成装置は、通常定着装置と、画質向
上装置と、画質向上信号に応じて通常定着後画質向上を
行い画質向上信号がないときは通常定着を行う選択処理
手段とを備えていることを特徴とするものである。The image forming apparatus according to the present invention includes a normal fixing device, an image quality improvement device, and a selection processing means that performs image quality improvement after normal fixing according to an image quality improvement signal, and performs normal fixing when there is no image quality improvement signal. It is characterized by this.
以下、図面を参照して本発明の実施例について説明する
。Embodiments of the present invention will be described below with reference to the drawings.
第１図は本発明を電子写真複写機に適用した実施例の構
成説明図である。第１図において、１は透明な部材よシ
なる原稿載置台で矢印方向に往復動する。２は集束性光
伝送体で、原稿載置台１上にある原稿像の光像を感光ド
ラム３上にスリット露光する。感光ドラム３は矢印方向
に回転する。FIG. 1 is an explanatory diagram of the configuration of an embodiment in which the present invention is applied to an electrophotographic copying machine. In FIG. 1, reference numeral 1 denotes a document mounting table made of a transparent member, which reciprocates in the direction of the arrow. Reference numeral 2 denotes a converging light transmitting body which exposes a light image of the original image on the original table 1 onto the photosensitive drum 3 through a slit. The photosensitive drum 3 rotates in the direction of the arrow.
４はコロナ帯電器であシ感光ドラムに一様に帯電を施す
。５は現像器であシ、一様に帯電された感光ドラムに集
束性光伝送体２によシ光像露光して形成した静電潜像を
顕像化する。4 is a corona charger which uniformly charges the photosensitive drum. A developing device 5 exposes a uniformly charged photosensitive drum to a light image through the convergent light transmitting member 2 to visualize an electrostatic latent image formed thereon.
一方、記録シート、すなわち転写紙Ｐは給紙ローラ６及
びレジスターロー２７によυドラム面に送υ込まれ、転
写帯電器８によりドラム」二の画像の転写を受ける。そ
の後、転写紙は分離手段１３によシトラムから分離され
、ガイド９を通２て通常定着装置１０に送られる。On the other hand, the recording sheet, ie, the transfer paper P, is fed onto the drum surface by the paper feed roller 6 and the register row 27, and receives the image transfer on the drum 2 by the transfer charger 8. Thereafter, the transfer paper is separated from the citrum by a separating means 13 and sent through a guide 9 2 to a fixing device 10.
定着装置１０は通常の定着モードで定着を行う通常定着
装置であって、この定着装置１０により転写紙上のトナ
ー像が定着され、転写紙は排紙ロー２１１により上段の
トレイ１２上に排出される。The fixing device 10 is a normal fixing device that performs fixing in a normal fixing mode, and the fixing device 10 fixes the toner image on the transfer paper, and the transfer paper is discharged onto the upper tray 12 by a paper discharge row 211. .
感光ドラム３上に残ったトナーは、クリーニング手段１
４により落とされ回収される。１５は原稿を露光する照
明系、１６は熱線吸収フィルター等のフィルターである
。The toner remaining on the photosensitive drum 3 is removed by cleaning means 1.
Dropped and recovered by 4. 15 is an illumination system for exposing the original, and 16 is a filter such as a heat ray absorption filter.
厚手の転写紙またはＯＨＰ用シート等の定着性の劣る記
録シートへ定着されたトナー像の画質を向上させるため
に、通常定着装置１０の他に、画質向上装置１７が設け
られる。In addition to the fixing device 10, an image quality improving device 17 is usually provided in order to improve the image quality of a toner image fixed on a recording sheet with poor fixing properties, such as a thick transfer paper or an OHP sheet.
本発明は、記録シートの質に応じて選択的に定着画像の
画質を向上できる装置を提供するものであって、そのた
めに、画質向上信号のない時には通常定着装置１０のみ
による通常定着を行い、また、画質向上信号が与えられ
た時には、この信号に応じて通常定着装置１０による通
常定着の後に記録シートを画質向上装置１７に送って選
択的に画質向上を行う選択処理手段が設けられる。この
ように手段の一例を第２図に示す。The present invention provides an apparatus that can selectively improve the image quality of a fixed image according to the quality of the recording sheet, and for this purpose, when there is no image quality improvement signal, normal fixing is performed only by the normal fixing device 10, Further, when an image quality improvement signal is given, a selection processing means is provided which selectively improves the image quality by sending the recording sheet to the image quality improvement device 17 after normal fixing by the normal fixing device 10 in response to this signal. An example of such means is shown in FIG.
第２図に示す例では、通常定着装置１０を通って通常定
着された記録シートは排紙ローラ１１によってトレイ１
２上に排出されるが、画質向上の場合には、この記録シ
ートをスイッチパックして、画質向上装置１７に送るス
イッチパック機構が設けられる。このスイッチパック機
構は、記録シートの通路内に回動可能に枢着された案内
板１８、並びに、光センサ２０と支点２１で枢着された
揺動レバー２２よ構成るアクチェータを含む。図中、２
３は案内板１８を１８ａの位置と１８ｂの位置の間に変
位させる変位手段、２４はスイッチパック機構の運動を
制御する制御手段、２５は排紙四−ラを矢印ａまたはｂ
の方向に駆動する駆動手段、２６は上記の制御手段に与
えられる画質向上信号を示す。In the example shown in FIG.
However, in the case of image quality improvement, a switch pack mechanism is provided to switch pack the recording sheet and send it to the image quality improvement device 17. This switch pack mechanism includes a guide plate 18 pivotally mounted within the path of the recording sheet, and an actuator constituted by an optical sensor 20 and a swinging lever 22 pivotally mounted at a fulcrum 21. In the figure, 2
3 is a displacement means for displacing the guide plate 18 between the positions 18a and 18b, 24 is a control means for controlling the movement of the switch pack mechanism, and 25 is a paper ejecting four-ra in the direction of arrow a or b.
26 indicates an image quality improvement signal given to the above control means.
上記のスイッチパック機構は次のように作用する。The switch pack mechanism described above operates as follows.
画質向上信号２６がない時には、案内板１８は１８ａの
位置にあり、排紙ローラ１１は矢印ａで示す方向に回転
している。記録シートＰは通常定着装置１０によって定
着され案内板１８上を排紙ローラ１１に送られて、トレ
イ１２上に排紙される。次に、画質向上信号２６が与え
られた時には、通常定着装置１０を通過する記録シート
Ｐの先端がアクチェータをオンとし、すなわち揺動レバ
ー２２を上げてレノ々−２２が光センサ２０をよこぎる
ようにし、これによって記録シートの存在が検知される
。このとき、案内板１８は１８ａの位置にあって、記録
シートは排紙ローラ１１に送られる。記録シートの後端
が通過して揺動レバー２２を下げて所定位置に戻どるこ
とによってアクチェータがオフとなると、排紙ローラ１
１の矢印ａ方向の回転が停止され、矢印す方向への回転
に切換えられる。これと共に案内板１８はｉｓｂの位置
に変位される。その手段としては、回転軸の回転または
プラン・シャ等の周知の手段を使用できる。When there is no image quality improvement signal 26, the guide plate 18 is at the position 18a, and the paper discharge roller 11 is rotating in the direction shown by arrow a. The recording sheet P is normally fixed by a fixing device 10, is sent on a guide plate 18 to a paper discharge roller 11, and is discharged onto a tray 12. Next, when the image quality improvement signal 26 is given, the leading edge of the recording sheet P passing through the fixing device 10 normally turns on the actuator, that is, raises the swing lever 22 and causes the recording sheet 22 to pass the optical sensor 20. This allows the presence of the recording sheet to be detected. At this time, the guide plate 18 is at the position 18a, and the recording sheet is sent to the paper discharge roller 11. When the rear end of the recording sheet passes and the actuator is turned off by lowering the swing lever 22 and returning to the predetermined position, the paper ejection roller 1
1 is stopped from rotating in the direction of arrow a, and is switched to rotation in the direction of arrow A. At the same time, the guide plate 18 is displaced to the isb position. As a means for this, known means such as rotation of a rotating shaft or a plansha can be used.
排紙ローラの停止時、記録シートの端は排紙ロー２１１
の対に挾持されていて、排紙ローラの逆方向回転により
案内板１８によυ下方に導かれ、がイド４０により画質
向上装置１７に導入される。When the paper ejection roller stops, the edge of the recording sheet is placed on the paper ejection roller 211.
The sheet is held between a pair of sheets, guided downward by the guide plate 18 by the reverse rotation of the sheet discharge roller, and introduced into the image quality improvement device 17 by the id 40.
画質向上装置１７には、エンドレスのオーバーフィルム
２７がモータ内蔵のローラ２８と加圧ローラ２９との間
に挾み込壕れておシ、ローラ２８と同期した線速度で回
転している。ローラ３０゜３１はオーバーフィルム２７
の保持ローラである。In the image quality improvement device 17, an endless overfilm 27 is inserted between a motorized roller 28 and a pressure roller 29, and rotates at a linear speed synchronized with the roller 28. Roller 30°31 is over film 27
This is a holding roller.
オーバーフィルム２７ば、例えば３０μの厚さをもつポ
リエステル、ポリエチレン等の平滑な表面をもつ合成樹
脂フィルムよ構成シ、画質向上装置１７に送られた記録
シートＰのトナー画像面はオーバーフィルム２７を介し
て加圧熱定着され有彩色投影画像が得られる状態となり
排出ローラ３２によシ下段トレイ３３上に排出される。The over film 27 is made of a synthetic resin film having a smooth surface, such as polyester or polyethylene, with a thickness of 30 μm, for example. The image is fixed under pressure and heat to obtain a chromatic color projection image, and is discharged onto the lower tray 33 by the discharge roller 32.
このように、通常定着装置によシ定着された記録シート
はガイド４０を通って画像面が薄いフィルムから成るオ
ーバーフィルムで処理され、画質を向上される。In this way, the recording sheet fixed by the normal fixing device passes through the guide 40 and the image surface is treated with an overfilm made of a thin film, thereby improving the image quality.
第３図、第４図は画質向上装置１７を通過する前後の０
Ｉ（Ｐフィルム３４上のトナー３０の状態を示した図で
ある。第３図は通過前であシ、ＯＨＰフィルム３４上の
トナー３５ａはトナー粒子表面に凹凸があシ透過光径路
は３６ａのごとくなり投影光が屈折散乱し、有彩色投影
画像は得られない。3 and 4 show 0 before and after passing through the image quality improvement device 17.
I(P) is a diagram showing the state of the toner 30 on the P film 34. FIG. As a result, the projection light is refracted and scattered, making it impossible to obtain a chromatic projection image.
第４図゛は第λ＠画質向上装置通過後の状態でありＯＨ
Ｐフィルム３４上のトナー３５ｂは互いに溶融し、又オ
ーバーフィルムにより表面層が平滑になり透過光径路は
３６ｂのように改善される。Figure 4 shows the state after passing through the λth image quality improvement device.
The toners 35b on the P film 34 are melted together, and the surface layer is smoothed by the overfilm, so that the transmitted light path is improved as shown in 36b.
以上の実施例はＯＨＰフィルムに関しての効果を示；７
たが一般紙のトナー画像の濃度向上にも効果がある。又
、画質向上装置の圧力、線速度については通常定着装置
に比べ圧力は高く線速度は遅く設定した方が効果が大き
い事はいうまでもない。The above examples show the effect on OHP films; 7
However, it is also effective in improving the density of toner images on general paper. It goes without saying that the pressure and linear velocity of the image quality improvement device will be more effective if the pressure is set higher and the linear velocity is lower than that of a normal fixing device.
なお、図示の実施例では、オーバーフィルムはエンドレ
ス方式であるが一方向に巻き取る方式のものも可能であ
る。また、画質向上信号としては透光性が要求されるト
ラペン（樹脂シート）への像形成、特にカラー像形成の
選択又は指令信号が適切なものであυ、通常のハガキへ
のコピーのように所望画質向上を行いたい時でも行なえ
る選択指定キーの信号でも良い。In the illustrated embodiment, the overfilm is of an endless type, but it is also possible to use a type of winding in one direction. In addition, as an image quality improvement signal, image formation on a translucent resin sheet (resin sheet), especially the selection or command signal of color image formation, is appropriate. It may also be a signal from a selection designation key that can be used even when desired image quality improvement is desired.
本発明は以上の様な構成であり、記録シートの質に応じ
て、選択的に画像を通常定着としたり或いは画質向上を
することが可能で、例えばＯＨＰシートの場合において
も有彩色投影画像を得ることができ、また、定着性の劣
る用紙使用においても品質の高いコピーを得る事ができ
る。The present invention is configured as described above, and it is possible to selectively fix an image to normal fixation or to improve the image quality depending on the quality of the recording sheet. For example, even in the case of an OHP sheet, it is possible to print a chromatic projection image Furthermore, high-quality copies can be obtained even when paper with poor fixing properties is used.
【図面の簡単な説明】
第１図は本発明で電子写真複写機に適用した実施例の構
成説明図、第２図は通常定着装置と画質向上装置の周辺
の詳細図、第３図は画質向上装置を通過前のＯＨＰフィ
ルム上のトナーの状態を示した図、第４図は画質向上装
置を通過後のＯＨＰフィルム上のトナーの状態を示した
６る。
１・・・原稿載置台 ２・・・集束性光伝送体３・
・・感光ドラム ４・・・コロナ帯電器１０・・
・通常定着装置 １１・・・排紙ローラ１２・・・ト
レイ １７・・・画質向上装置１８・・・案内
板 ２ｏ・・・光センサ２２・・・揺動レバー
２３・・・変位手段２４・・・制御手段
２５・・・駆動手段２６・・・画質向上信号 ２７・
・・オーバーフィルム２８．２９・・・ローラ ３０
．３１・・・保持ローラ３４ ・ＯＨＰフィルム ３
５ ａ ｅ ３５ ｂ ・” ）ナー３６ａ、３６ｂ・
・・透過光径路。[Brief Description of the Drawings] Fig. 1 is an explanatory diagram of the configuration of an embodiment of the present invention applied to an electrophotographic copying machine, Fig. 2 is a detailed view of the vicinity of a normal fixing device and an image quality improvement device, and Fig. 3 is an image quality FIG. 4 shows the state of the toner on the OHP film before passing through the image quality improving device, and FIG. 4 shows the state of the toner on the OHP film after passing through the image quality improving device. 1... Document mounting table 2... Focusing light transmission body 3.
...Photosensitive drum 4...Corona charger 10...
- Normal fixing device 11... Paper ejection roller 12... Tray 17... Image quality improvement device 18... Guide plate 2o... Optical sensor 22... Rocking lever 23... Displacement means 24.・Control means
25... Drive means 26... Image quality improvement signal 27.
...Over film 28.29...Roller 30
．． 31... Holding roller 34 ・OHP film 3
5 a e 35 b ・”）ner 36a, 36b・
...Transmitted light path.
Claims (1)
応じて通常定着後画質向上を行い画質向上信号がないと
きは通常定着を行う選択処理手段とを備えていることを
特徴とする画像形成装置。1. An image characterized by comprising a normal fixing device, an image quality improvement device, and a selection processing means that improves the image quality after normal fixing according to an image quality improvement signal and performs normal fixing when there is no image quality improvement signal. Forming device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60099158A JPS61256366A (en) | 1985-05-10 | 1985-05-10 | Image forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60099158A JPS61256366A (en) | 1985-05-10 | 1985-05-10 | Image forming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61256366A true JPS61256366A (en) | 1986-11-13 |
Family
ID=14239861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60099158A Pending JPS61256366A (en) | 1985-05-10 | 1985-05-10 | Image forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61256366A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1126331A1 (en) * | 2000-02-18 | 2001-08-22 | Canon Kabushiki Kaisha | Image forming apparatus for compensating thicker image recording material with respect to is heat capacity by using a smaller amount of toner |
-
1985
- 1985-05-10 JP JP60099158A patent/JPS61256366A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1126331A1 (en) * | 2000-02-18 | 2001-08-22 | Canon Kabushiki Kaisha | Image forming apparatus for compensating thicker image recording material with respect to is heat capacity by using a smaller amount of toner |
| US6434345B2 (en) | 2000-02-18 | 2002-08-13 | Canon Kabushiki Kaisha | Image forming apparatus |
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