JPH06175511A - Toner fixing device for electrophotography and the like - Google Patents
Toner fixing device for electrophotography and the likeInfo
- Publication number
- JPH06175511A JPH06175511A JP32571092A JP32571092A JPH06175511A JP H06175511 A JPH06175511 A JP H06175511A JP 32571092 A JP32571092 A JP 32571092A JP 32571092 A JP32571092 A JP 32571092A JP H06175511 A JPH06175511 A JP H06175511A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- heater
- recording material
- heating
- endless belt
- 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
Landscapes
- Fixing For Electrophotography (AREA)
- Combination Of More Than One Step In Electrophotography (AREA)
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、静電印刷、電子写真等
におけるトナー定着装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toner fixing device for electrostatic printing, electrophotography and the like.
【０００２】[0002]
【従来の技術】従来の静電印刷、電子写真等におけるプ
ロセスは、現像、転写、定着の順で最終的に紙等の印刷
媒体にトナーを定着固定している。この定着装置におけ
る加熱定着ローラでは、トナー加熱源としてハロゲンラ
ンプを用い、温度を一定に制御するためにサーミスタ等
を使った温度制御回路を設けている。さらに最近では例
えば、特開平１−２３１０７８号公報（公知例Ａ）で
は、トナー加熱定着ローラー本体そのものをセラミック
赤外線ヒーター等で形成したもの、特公昭６４−４１７
６号公報（公知例Ｂ）では、加工を容易にするためにガ
ラス等の結着材中にＰＴＣセラミックを分散させたもの
が開示されている。2. Description of the Related Art In conventional processes such as electrostatic printing and electrophotography, toner is finally fixed and fixed on a print medium such as paper in the order of development, transfer and fixing. In the heat fixing roller in this fixing device, a halogen lamp is used as a toner heating source, and a temperature control circuit using a thermistor or the like is provided to control the temperature at a constant level. More recently, for example, in Japanese Unexamined Patent Publication No. 1-21078 (known example A), the toner heating and fixing roller main body itself is formed of a ceramic infrared heater or the like, Japanese Patent Publication No. 64-417.
Japanese Unexamined Patent Publication No. 6 (Publication B) discloses a PTC ceramic dispersed in a binder such as glass for facilitating the processing.
【０００３】[0003]
【発明が解決しようとする課題】しかし、上記従来の定
着装置では下記のような問題点があった。 （イ）上記現像、転写、定着の順で記録材上にトナーを
固定するプロセスを持つ定着装置では、小型化を図る上
でスペース的に限界がある。 （ロ）トナー加熱源としてハロゲンランプを用いたもの
では、トナー加熱定着ローラ本体に熱を伝える手段とし
て熱輻射を利用しているため伝熱効率が悪く、定着装置
の電源をＯＮしてからトナー加熱定着ローラ本体表面が
所定温度になるまでの時間（以下、ウォームアップ時間
という）が長く、このため電力ロスが大きくなる問題が
ある。 （ハ）また、上記公知例Ａでは定着ローラー表面のクラ
ウン加工等精密加工が難しく、寸法制御が困難で加工コ
ストが高くなる。 （ニ）上記公知例Ｂでは結着材を用いているため、ＰＴ
Ｃ特性の低下等によりトナーの定着性が悪化するおそれ
がある。However, the above-mentioned conventional fixing device has the following problems. (A) In the fixing device having the process of fixing the toner on the recording material in the order of development, transfer and fixing, there is a space limit in achieving miniaturization. (B) In the case of using a halogen lamp as a toner heating source, heat radiation efficiency is poor because heat radiation is used as a means for transmitting heat to the toner heating and fixing roller main body, so that the toner is heated after the power of the fixing device is turned on. There is a problem that the time required for the surface of the fixing roller main body to reach a predetermined temperature (hereinafter referred to as warm-up time) is long, resulting in a large power loss. (C) Further, in the above-mentioned known example A, precision processing such as crown processing on the surface of the fixing roller is difficult, dimension control is difficult, and the processing cost is high. (D) In the above-mentioned known example B, since the binder is used, PT
The fixing property of the toner may be deteriorated due to the deterioration of the C characteristic or the like.
【０００４】本発明の目的は、上記各問題点を解消し、
転写及び定着プロセスを同時に行うための新プロセスを
提供すると共にウォームアップ時間の大幅な短縮を実現
できる定着装置を提供しようとするものである。The object of the present invention is to solve the above problems.
It is an object of the present invention to provide a new process for simultaneously performing the transfer and fixing processes and a fixing device capable of significantly reducing the warm-up time.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に、本発明の第１発明は、電子写真、静電印刷その他現
像、転写、定着手段を備えたトナー定着装置において、
トナー加熱用ヒーター上に無端ベルト状シートを設け、
この無端ベルト状シート上を走行する記録材の移送手段
を設け、前記記録材上に転写されたトナー像を前記無端
ベルト状シートを介して前記トナー加熱用ヒーターで加
熱定着させるようにし、前記無端ベルト状シートは前記
トナー加熱用ヒーター上でテンションがかからないよう
に接触し、前記記録材の進行方向に移動可能とした電子
写真等のトナー定着装置とし、また第２発明は、電子写
真、静電印刷その他現像、転写、定着手段を備えたトナ
ー定着装置において、トナー加熱用ヒーター上に無端ベ
ルト状シートを設け、この無端ベルト状シート上を走行
する記録材の移送手段を設け、前記無端ベルト状シート
と記録材を介して前記トナー加熱用ヒーターと対面する
位置にトナーが現像されたドラム状感光体を設けた電子
写真等のトナー定着装置とし、さらに第３発明は、トナ
ー加熱用ヒーターとドラム状感光体とが、無端ベルト状
シートと記録材とを介して接触している電子写真等のト
ナー定着装置とし、さらに又第４発明は、無端ベルト状
シートとドラム状感光体との間に隙間を設けた電子写真
等のトナー定着装置とした。In order to achieve the above object, a first invention of the present invention is to provide a toner fixing device equipped with electrophotographic, electrostatic printing and other developing, transferring and fixing means.
Provide an endless belt-like sheet on the heater for heating the toner,
A means for transporting the recording material running on the endless belt-shaped sheet is provided, and the toner image transferred on the recording material is heated and fixed by the toner heating heater via the endless belt-shaped sheet. The belt-shaped sheet is a toner fixing device for electrophotography or the like, which is in contact with the heater for heating the toner so as not to apply tension, and is movable in the traveling direction of the recording material. In a toner fixing device equipped with printing, development, transfer, and fixing means, an endless belt-shaped sheet is provided on a heater for heating toner, and a transfer means for a recording material running on the endless belt-shaped sheet is provided. Toner fixing for electrophotography, etc., in which a drum-shaped photosensitive member with toner developed is provided at a position facing the heater for heating the toner through a sheet and a recording material. A third aspect of the invention is a toner fixing device for electrophotography, in which a heater for heating a toner and a drum-shaped photoreceptor are in contact with each other via an endless belt-shaped sheet and a recording material, and a fourth invention. Is a toner fixing device for electrophotography or the like in which a gap is provided between the endless belt-shaped sheet and the drum-shaped photosensitive member.
【０００６】また、第５発明は、トナー加熱用ヒーター
が所定の温度で自己温度制御機能を有するＰＴＣ材料
（正の温度係数を有する材料）からなる板状ヒーターで
ある定着装置とした。The fifth invention is a fixing device in which the heater for heating the toner is a plate heater made of a PTC material (a material having a positive temperature coefficient) having a self-temperature control function at a predetermined temperature.
【０００７】[0007]
【作用】本発明の第１発明は、従来の加熱定着ローラと
は異なり、走行する記録材の下方側にトナー加熱用ヒー
ターを設け、このトナー加熱用ヒーター上に無端ベルト
状シートを設けたので、熱は無端ベルト状シートを介し
て記録材の裏面側より伝達され、転写されたトナー像を
確実に溶融定着することができる。無端ベルト状シート
は、トナー加熱用ヒーター上にテンションがかからない
状態で接触し、記録材の進行方向に移動可能としたの
で、移送手段により記録材が移送されてくると、無端ベ
ルト状シートが進行方向に移動するので記録材はトナー
加熱用ヒーターの表面上を滑るように移動し、定着装置
への突入とトナーの加熱溶融による記録材への定着固定
が安定して行われるようになった。In the first aspect of the present invention, unlike the conventional heat fixing roller, the toner heating heater is provided below the running recording material, and the endless belt-like sheet is provided on the toner heating heater. The heat is transferred from the back surface side of the recording material via the endless belt-like sheet, and the transferred toner image can be reliably fused and fixed. The endless belt-shaped sheet comes into contact with the toner heating heater without tension and is movable in the moving direction of the recording material.When the recording material is transferred by the transfer means, the endless belt-shaped sheet advances. As the recording material moves in the direction, the recording material slides on the surface of the heater for heating the toner, and the fixing and fixing to the recording material due to the rush into the fixing device and the heating and melting of the toner are stably performed.
【０００８】また第２発明、第３発明及び第４発明は、
トナー加熱用ヒーターと対面する位置に無端ベルト状シ
ートと記録材を介して、トナーが現像されたドラム状感
光体を設けたので、トナー像の記録材への転写と定着が
同じ位置で同時に行うことができるようになった。従っ
て、移送手段により記録材が移送されてくると、前記ド
ラム状感光体が記録材の表面にトナーを転写し、同時に
前記トナー加熱用ヒーターが記録材の裏面から熱を伝達
してトナーの加熱定着を行う。トナー加熱用ヒーター上
の無端ベルト状シートは記録材の進行方向に移動するの
で、第１発明と同様に記録材上のトナーの加熱定着が安
定して行える。The second invention, the third invention and the fourth invention are
Since the drum-shaped photoconductor in which the toner is developed is provided through the endless belt-shaped sheet and the recording material at a position facing the heater for heating the toner, the transfer and the fixing of the toner image to the recording material are simultaneously performed at the same position. I was able to do it. Therefore, when the recording material is transferred by the transfer means, the drum-shaped photoconductor transfers the toner onto the surface of the recording material, and at the same time, the toner heating heater transfers heat from the back surface of the recording material to heat the toner. Fix it. Since the endless belt-shaped sheet on the heater for heating the toner moves in the traveling direction of the recording material, the heat fixing of the toner on the recording material can be stably performed as in the first invention.
【０００９】第３発明では、トナー加熱用ヒーターとド
ラム状感光体とを無端ベルト状シートと記録材とを介し
て接触するようにしたので、トナー加熱用ヒーターの熱
を効率良く記録材のトナーへ伝達でき、しかもドラム状
感光体からトナーを記録材上に正確に転写することがで
きる。第４発明では、ドラム状感光体が無端ベルト状シ
ートから離れているが、ドラム状感光体から記録材上へ
のトナーの転写と記録材の移動及びトナー加熱用ヒータ
ーによる加熱定着を同期させることにより正確な転写と
定着が安定して行われる。According to the third aspect of the invention, since the heater for heating the toner and the drum-shaped photosensitive member are brought into contact with each other via the endless belt-shaped sheet and the recording material, the heat of the heater for heating the toner is efficiently transferred to the toner of the recording material. The toner can be accurately transferred onto the recording material from the drum-shaped photosensitive member. In the fourth aspect of the invention, the drum-shaped photoconductor is separated from the endless belt-shaped sheet, but the transfer of the toner from the drum-shaped photoconductor to the recording material, the movement of the recording material, and the heat fixing by the toner heating heater are synchronized. As a result, accurate transfer and fixing are stably performed.
【００１０】また第５発明では、トナー加熱用ヒーター
がＰＴＣ材料で構成された板状ヒーターとしたので、熱
容量を小さくでき、その結果トナー加熱用ヒーターの表
面を短時間で所定の温度にすることができると共に温度
制御回路がなくともこの温度を維持することができる。In the fifth aspect of the invention, since the heater for heating the toner is a plate heater made of PTC material, the heat capacity can be reduced, and as a result, the surface of the heater for heating the toner can be brought to a predetermined temperature in a short time. In addition, the temperature can be maintained without the temperature control circuit.
【００１１】[0011]
【実施例】本発明の一実施例として示した電子写真等の
トナー定着装置について、図面を参照して説明する。図
１において、１はトナー加熱用ヒーター、２は無端ベル
ト状シートで、その形状を筒状とし、又、テンションが
かからないようにトナー加熱用ヒーター１上で接触し、
記録材の進行方向に移動可能に設けてある。そして、こ
の無端ベルト状シート２は、ＰＦＡやＰＴＦＥ等のフッ
ソ樹脂、ポリアミドやポリイミド等の有機物等や、金属
等の耐熱性のある材質から構成されている。DESCRIPTION OF THE PREFERRED EMBODIMENTS A toner fixing device for electrophotography and the like shown as an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, 1 is a heater for heating toner, 2 is an endless belt-shaped sheet, and the shape thereof is cylindrical, and contact is made on the heater for heating toner 1 so that tension is not applied,
It is provided so as to be movable in the traveling direction of the recording material. The endless belt-shaped sheet 2 is made of a fluorine resin such as PFA or PTFE, an organic material such as polyamide or polyimide, or a heat-resistant material such as metal.
【００１２】３、４は移送手段としてのテンションロー
ラ、５は記録材で、記録材５はテンションローラ３、４
によりトナー加熱用ヒーター１上を走行するようにして
いる。６はトナーが現像されたドラム状感光体で、トナ
ー加熱用ヒーター１と対面する位置に無端ベルト状シー
ト２と記録材５を介して設けている。又、７は帯電器
で、前記ドラム状感光体６内でトナー加熱用ヒーター側
に固定している。ドラム状感光体６は、露光時に光電流
を流すための閉回路を形成しているが、前記帯電器７よ
り電荷を与えてドラム状感光体６の内部表面に電位差を
形成させるために転写コロトロン動作時には、前記閉回
路をカットするような回路を設定している。８はトナー
で、このトナー特性については、溶融時の表面エネルギ
ーを調整して、記録材に溶融固定化して定着されるよう
にバインダーの粘弾性特性を調整しておけばよい。Reference numerals 3 and 4 are tension rollers as a transfer means, and 5 is a recording material.
Thus, the toner is heated on the heater 1 for heating the toner. Reference numeral 6 denotes a drum-shaped photosensitive member on which toner has been developed, which is provided at a position facing the heater 1 for heating the toner, with the endless belt-shaped sheet 2 and the recording material 5 interposed therebetween. Further, 7 is a charger, which is fixed to the toner heating heater side in the drum-shaped photoreceptor 6. The drum-shaped photoconductor 6 forms a closed circuit for passing a photocurrent at the time of exposure, but in order to form a potential difference on the inner surface of the drum-shaped photoconductor 6 by giving an electric charge from the charger 7, the transfer corotron. At the time of operation, a circuit that cuts the closed circuit is set. Reference numeral 8 denotes a toner. Regarding this toner property, the surface energy at the time of melting may be adjusted so that the viscoelastic property of the binder is adjusted so that the binder is melted and fixed on the recording material and fixed.
【００１３】本実施例のトナー定着装置では、記録材５
がテンションローラ３、４によりトナー加熱用ヒーター
１上を走行する際、無端ベルト状シート２が記録材の進
行方向に移動できるようにしているので、記録材５の安
定した走行が得られる。従って、トナー加熱用ヒーター
１と対面する位置にドラム状感光体６がなく、別途に記
録材５上にトナー像を転写する場合、又はドラム状感光
体６がトナー加熱用ヒーター１と対面していても離れて
いる場合でも記録材５の安定走行とトナーの加熱溶融に
よる定着が実現できるようになっている。In the toner fixing device of this embodiment, the recording material 5
Since the endless belt-shaped sheet 2 is allowed to move in the traveling direction of the recording material when traveling on the heater 1 for heating the toner by the tension rollers 3 and 4, the stable traveling of the recording material 5 can be obtained. Therefore, there is no drum-shaped photoconductor 6 at a position facing the toner heating heater 1, and when the toner image is separately transferred onto the recording material 5, or the drum-shaped photoconductor 6 faces the toner heating heater 1. Even if they are far apart, stable running of the recording material 5 and fixing by heating and melting the toner can be realized.
【００１４】トナー加熱用ヒーター１が無端ベルト状シ
ート２、記録材５とを介して接触している場合、トナー
加熱用ヒーター１と無端ベルト状シート２との摩擦係数
μ１が、無端ベルト状シート２と記録材５との摩擦係数
μ２及びドラム状感光体６と記録材５との摩擦係数μ３
よりも小さくなるように設定すれば記録材５の安定走行
が得られる。When the heater 1 for heating the toner is in contact with the endless belt-shaped sheet 2 and the recording material 5, the friction coefficient μ1 between the heater 1 for heating the toner and the endless belt-shaped sheet 2 is 2 and the recording material 5 friction coefficient μ2, and the drum-shaped photoconductor 6 and the recording material 5 friction coefficient μ3
If it is set to be smaller than that, stable running of the recording material 5 can be obtained.
【００１５】具体的にはトナー加熱用ヒーター１表面の
潤滑材、無端ベルト状シート２の表裏の表面平滑性及び
ドラム状感光体６の表面材質を、μ３＞μ２＞μ１の関
係が成立するように設定している。従って、このように
摩擦係数を設定することで、記録材５の安定した走行性
を確保できると共にトナー表面に擦れることなく良好な
定着を行うことが可能となった。無端ベルト状シートの
材質については、金属箔やフィルム等、特に限定される
ものではなく、上記条件を満足するものであればよい。Specifically, the lubricant on the surface of the heater 1 for heating the toner, the surface smoothness of the front and back surfaces of the endless belt-shaped sheet 2, and the surface material of the drum-shaped photosensitive member 6 have a relationship of μ3>μ2> μ1. Is set to. Therefore, by setting the friction coefficient in this way, stable running of the recording material 5 can be ensured, and good fixing can be performed without rubbing the toner surface. The material of the endless belt-shaped sheet is not particularly limited, such as a metal foil or a film, and may be any material that satisfies the above conditions.
【００１６】図１に示した実施例は、トナー加熱用ヒー
ター１とドラム状感光体６が無端ベルト状シート２と記
録材５とを介して接触するようにしている。このため記
録材５がテンションローラ３、４により移送されてくる
と、ドラム状感光体６内に固定されている帯電器７がト
ナー８と同極の電荷を与えてトナー８を分離し、記録材
５の表面へ正確に転写する。同時にトナー加熱用ヒータ
ー１が、無端ベルト状シート２を介して前記記録材５の
裏面から熱を効率良くトナー８へ伝達し、このトナー８
を加熱溶融して記録材５の表面へ定着させる。In the embodiment shown in FIG. 1, the toner heating heater 1 and the drum-shaped photosensitive member 6 are in contact with each other via the endless belt-shaped sheet 2 and the recording material 5. Therefore, when the recording material 5 is transferred by the tension rollers 3 and 4, the charger 7 fixed in the drum-shaped photoconductor 6 gives a charge of the same polarity as the toner 8 to separate the toner 8, and the recording is performed. Accurately transfer to the surface of the material 5. At the same time, the toner heating heater 1 efficiently transfers heat from the back surface of the recording material 5 to the toner 8 via the endless belt-shaped sheet 2, and the toner 8
Is melted by heating and fixed on the surface of the recording material 5.
【００１７】図２は他実施例を示すもので、無端ベルト
状シート２とドラム状感光体６との間に隙間を設けたも
のである。図３は、図１及び図２で示した定着装置に用
いたトナー加熱用ヒーター１の拡大断面図である。トナ
ー加熱用ヒーター１は板状のＰＴＣセラミックヒーター
を有するものである。９はトナー加熱用ヒーターの支持
台で、この支持台９はＰＰＳ（ポリフェニレンサルファ
イト）等の耐熱性樹脂や金属等で形成されている。10は
ＰＴＣセラミックヒーターである。11、12は電極で、Ｐ
ＴＣセラミックヒーター10の上下にそれぞれ設け、これ
ら電極11、12はＡｌ等の熱伝導性の良好な導電性材料で
構成されている。また、ＰＴＣセラミックヒーター10と
電極11、 ＰＴＣセラミックヒーター10と電極12との間の
接合は導電性接着剤13により行われる。FIG. 2 shows another embodiment, in which a gap is provided between the endless belt-shaped sheet 2 and the drum-shaped photosensitive member 6. FIG. 3 is an enlarged cross-sectional view of the toner heating heater 1 used in the fixing device shown in FIGS. 1 and 2. The toner heating heater 1 has a plate-shaped PTC ceramic heater. Reference numeral 9 is a support for the heater for heating the toner, and the support 9 is made of a heat-resistant resin such as PPS (polyphenylene sulfite) or a metal. 10 is a PTC ceramic heater. 11 and 12 are electrodes, P
The electrodes 11 and 12 are provided above and below the TC ceramic heater 10, respectively, and are made of a conductive material having good thermal conductivity such as Al. Further, the PTC ceramic heater 10 and the electrode 11 and the PTC ceramic heater 10 and the electrode 12 are joined by a conductive adhesive 13.
【００１８】電極11の表面には無端ベルト状シートとの
滑り性を良くするため、ＰＦＡ（四弗化エチレン樹脂）
などの滑材14をコーティングしている。又、電極11、12
の材料、取り方等はこの例に限られるものではない。さ
らに、ＰＴＣセラミックヒーター10を化学式で示すと、
Ｂａ１−ＸＰｂＸＴｉＯ３（Ｘ＝０．０１〜０．３）で
あり、電圧印加時にトナー加熱用ヒーター１の表面温度
が１８０℃±５℃になるようにＰＴＣ特性を調節してあ
る。またＰＴＣセラミックヒーター10と支持台９との固
定は非熱伝導性の耐熱性接着剤を用いている。尚、ＰＴ
Ｃセラミックヒーター10の発熱温度はトナーの溶融温度
に応じてＰＴＣ特性を調整すればよい。The surface of the electrode 11 is made of PFA (tetrafluoroethylene resin) in order to improve the sliding property with the endless belt-like sheet.
Such as lubricant 14 is coated. Also, the electrodes 11, 12
The material, method of taking, etc. are not limited to this example. Furthermore, when the PTC ceramic heater 10 is represented by a chemical formula,
Ba1-XPbXTiO3 (X = 0.01 to 0.3), and the PTC characteristic is adjusted so that the surface temperature of the heater 1 for heating the toner becomes 180 ° C. ± 5 ° C. when a voltage is applied. Further, the PTC ceramic heater 10 and the supporting base 9 are fixed to each other by using a non-heat conductive heat resistant adhesive. Incidentally, PT
The heat generation temperature of the C ceramic heater 10 may be adjusted by adjusting the PTC characteristic according to the melting temperature of the toner.
【００１９】図３のＰＴＣセラミックヒーター10を用
い、温度制御用回路を取外した状態で、ウォームアップ
時間並びにトナー加熱用ヒーター１の表面温度分布につ
いて試験を行った。試験方法として、図４に示すように
トナー加熱用ヒーター１のＡからＥの５箇所に熱電対15
Ａ〜15Ｅを取付け、ＰＴＣセラミックヒーター用電源16
（ＡＣ１００Ｖ）をＯＮして各部における温度の経時変
化をレコーダーにより記録した。この記録は、表１に示
す。Using the PTC ceramic heater 10 shown in FIG. 3, the temperature control circuit was removed, and the warm-up time and the surface temperature distribution of the toner heating heater 1 were tested. As a test method, as shown in FIG. 4, a thermocouple 15 is provided at five points A to E of the toner heating heater 1.
Attach A to 15E, power supply for PTC ceramic heater 16
(AC100V) was turned on and the time-dependent change in the temperature of each part was recorded by a recorder. This record is shown in Table 1.
【００２０】[0020]
【表１】 [Table 1]
【００２１】上記表１から判るように、ＰＴＣセラミッ
クヒーター10は熱容量が極力小さいため、従来のキセノ
ンランプ等を用いた定着装置に比べ、ウォームアップ時
間が約４秒程度で済み、大幅に短縮されている。しかも
トナー加熱用ヒーター表面の温度を全体的にむらなく均
一に所定温度で維持している。As can be seen from Table 1 above, since the PTC ceramic heater 10 has a heat capacity as small as possible, the warm-up time is about 4 seconds as compared with the conventional fixing device using a xenon lamp, which is greatly reduced. ing. In addition, the temperature of the surface of the heater for heating the toner is uniformly maintained at a predetermined temperature without unevenness.
【００２２】また、図１で示した電子写真等のトナー定
着装置をレーザービームプリンタ（松下電器産業株式会
社製 ＫＸ−Ｐ４４５０）に温度制御用回路を取外す等
一部改造して装着し、連続印字試験を行った。試験は低
温／低湿（１０℃／２０％ＲＨ）、常温／常湿（２０℃
／６０％ＲＨ）、高温／高湿（３２．５℃／８０％Ｒ
Ｈ）のそれぞれの環境下で１０万枚まで行ったが、いず
れの場合もホットオフセット、コールドオフセット、定
着むら等の現象は見られず良好な定着性を示した。Further, the toner fixing device for electrophotography shown in FIG. 1 is mounted on a laser beam printer (KX-P4450 manufactured by Matsushita Electric Industrial Co., Ltd.) with some modifications such as the temperature control circuit removed for continuous printing. The test was conducted. The test is low temperature / low humidity (10 ℃ / 20% RH), normal temperature / normal humidity (20 ℃)
/ 60% RH), high temperature / high humidity (32.5 ° C / 80% R)
Under each environment of H), the process was repeated up to 100,000 sheets, but in all cases, phenomena such as hot offset, cold offset, and uneven fixing were not observed, and good fixability was exhibited.
【００２３】上記のように本実施例によると、表１から
も明らかなようにウォームアップ時間を大幅に短縮する
ことができる。また、温度制御用回路を使用せずにトナ
ー加熱用ヒーターの表面を均一に所望の温度で維持する
ことが可能となった。しかも、温度の経時変化がほどん
どなく、連続印字試験においても良好な定着性が得られ
る。さらに又、ＰＴＣセラミックヒーターの寸法精度に
かなりの自由度があるので加工コストも低減できる。As described above, according to the present embodiment, the warm-up time can be greatly shortened as is apparent from Table 1. Further, the surface of the heater for heating the toner can be uniformly maintained at a desired temperature without using a temperature control circuit. In addition, the temperature hardly changes with time, and good fixability can be obtained even in the continuous printing test. Furthermore, since the PTC ceramic heater has a great degree of freedom in dimensional accuracy, the processing cost can be reduced.
【００２４】[0024]
【発明の効果】本発明の第１発明は、上記のようにトナ
ー加熱用ヒーター上でテンションがかからないように接
触し、記録材の進行方向に移動可能な無端ベルト状シー
トを設けたので、移送手段による記録材の走行が安定す
ると共にトナー加熱用ヒーターからの熱を無端ベルト状
シートを介して記録材の裏面側から確実に伝達でき、ト
ナーの溶融と、定着が確実にしかも迅速に行えウォーム
アップ時間の短縮化も実現できるようになった。As described above, according to the first aspect of the present invention, since the endless belt-shaped sheet which is in contact with the heater for heating the toner so as not to apply tension and is movable in the traveling direction of the recording material is provided, the transfer is performed. The stable running of the recording material by the means and the heat from the heater for heating the toner can be reliably transmitted from the back side of the recording material through the endless belt-like sheet, and the toner can be melted and fixed reliably and quickly. It has also become possible to shorten the uptime.
【００２５】また第２発明、第３発明及び第４発明は、
トナーが現像されたドラム状感光体を、トナー加熱用ヒ
ーターと対面する位置に無端ベルト状シートと記録材と
を介して設けたので、従来の電子写真等のプロセスであ
る現象、転写、定着を順々に行うプロセスに代わって、
転写、定着を同時に行う新しいプロセスを提供すること
が可能となり、その結果トナー定着装置の小型化を実現
することができるようになった。The second invention, the third invention and the fourth invention are
Since the drum-shaped photosensitive member on which the toner is developed is provided at a position facing the heater for heating the toner via the endless belt-shaped sheet and the recording material, the phenomenon, transfer, and fixing, which are processes of the conventional electrophotography, can be performed. Instead of a step-by-step process,
It has become possible to provide a new process in which transfer and fixing are performed simultaneously, and as a result, it has become possible to realize downsizing of the toner fixing device.
【００２６】第３発明では、トナー加熱用ヒーターとド
ラム状感光体とを、無端ベルト状シートと記録材とを介
して接触させたので、ドラム状感光体からのトナーの転
写を正確にできると共にトナー加熱用ヒーターの熱を効
率良く記録材上のトナーに伝達し、トナーの定着時間を
より一層短縮することができた。さらに第５発明は、ト
ナー加熱用ヒーターがＰＴＣ材料からなる板状ヒーター
を用いて熱容量を極力小さくしたので、ウォームアップ
時間を従来のものに比べ大幅に短縮できた。しかも、温
度制御用回路を使用せずにトナー加熱用ヒーターの表面
を均一に所望の温度で維持することができ、連続印字す
る場合にも定着むらのない良好な定着性を得る電子写真
等のトナー定着装置を提供できた。In the third aspect of the invention, since the heater for heating the toner and the drum-shaped photoconductor are brought into contact with each other through the endless belt-shaped sheet and the recording material, the toner can be accurately transferred from the drum-shaped photoconductor. The heat of the heater for heating the toner was efficiently transferred to the toner on the recording material, and the fixing time of the toner could be further shortened. Furthermore, in the fifth aspect of the invention, the heater for heating the toner is a plate heater made of a PTC material, and the heat capacity is made as small as possible, so that the warm-up time can be greatly shortened compared to the conventional one. Moreover, the surface of the heater for heating the toner can be uniformly maintained at a desired temperature without using a temperature control circuit, and even in continuous printing, good fixing property without fixing unevenness can be obtained. A toner fixing device could be provided.
【図１】本発明の一実施例を示す電子写真等のトナー定
着装置の説明図FIG. 1 is an explanatory diagram of a toner fixing device for electrophotography showing an embodiment of the present invention.
【図２】同トナー定着装置の他実施例を示す説明図FIG. 2 is an explanatory view showing another embodiment of the toner fixing device.
【図３】トナー定着装置に用いるトナー加熱用ヒーター
の拡大断面図FIG. 3 is an enlarged sectional view of a toner heating heater used in a toner fixing device.
【図４】トナー加熱用ヒーターの温度立ち上がり特性試
験を行う装置の要部説明図FIG. 4 is an explanatory view of a main part of an apparatus for performing a temperature rising characteristic test of a heater for heating a toner.
１ トナー加熱用ヒーター ２ 無端ベルト状シート ３、４ 移送手段 ５ 記録材 ６ ドラム状感光体 ８ トナー 1 Heater for heating toner 2 Endless belt-shaped sheet 3, 4 Transfer means 5 Recording material 6 Drum-shaped photoconductor 8 Toner
Claims (5)
定着手段を備えたトナー定着装置において、トナー加熱
用ヒーター上に無端ベルト状シートを設け、この無端ベ
ルト状シート上を走行する記録材の移送手段を設け、前
記記録材上に転写されたトナー像を前記無端ベルト状シ
ートを介して前記トナー加熱用ヒーターで加熱定着させ
るようにし、前記無端ベルト状シートは前記トナー加熱
用ヒーター上でテンションがかからないように接触し、
前記記録材の進行方向に移動可能としたことを特徴とす
る電子写真等のトナー定着装置。1. Electrophotography, electrostatic printing and other development, transfer,
In a toner fixing device having a fixing means, an endless belt-shaped sheet is provided on a heater for heating a toner, and a recording material transfer means for traveling on the endless belt-shaped sheet is provided, and a toner image transferred onto the recording material is provided. Through the endless belt-shaped sheet is heated and fixed by the heater for heating the toner, the endless belt-shaped sheet is contacted without tension on the heater for heating the toner,
A toner fixing device for electrophotography or the like, which is movable in the traveling direction of the recording material.
定着手段を備えたトナー定着装置において、トナー加熱
用ヒーター上に無端ベルト状シートを設け、この無端ベ
ルト状シート上を走行する記録材の移送手段を設け、前
記無端ベルト状シートと記録材を介して前記トナー加熱
用ヒーターと対面する位置にトナーが現像されたドラム
状感光体を設けたことを特徴とする電子写真等のトナー
定着装置。2. Electrophotography, electrostatic printing and other development, transfer,
In a toner fixing device provided with a fixing means, an endless belt-shaped sheet is provided on a heater for heating toner, and a recording material transfer means for traveling on the endless belt-shaped sheet is provided, and the endless belt-shaped sheet and the recording material are interposed. A toner fixing device for electrophotography or the like, wherein a drum-shaped photosensitive member on which toner is developed is provided at a position facing the heater for heating the toner.
とが、無端ベルト状シートと記録材とを介して接触して
いることを特徴とする請求項２記載の電子写真等のトナ
ー定着装置。3. The toner fixing device for electrophotography according to claim 2, wherein the heater for heating the toner and the drum-shaped photosensitive member are in contact with each other via the endless belt-shaped sheet and the recording material.
の間に隙間を設けたことを特徴とする請求項２記載の電
子写真等のトナー定着装置。4. The toner fixing device for electrophotography according to claim 2, wherein a gap is provided between the endless belt-shaped sheet and the drum-shaped photosensitive member.
度に応じた所定の温度で自己温度制御機能を持つＰＴＣ
材料（正の温度係数を有する材料）で構成された板状ヒ
ーターであることを特徴とする請求項３又は請求項４記
載の電子写真等のトナー定着装置。5. A PTC in which the heater for heating the toner has a self-temperature control function at a predetermined temperature according to the melting temperature of the toner.
The toner fixing device for electrophotography according to claim 3 or 4, which is a plate heater made of a material (a material having a positive temperature coefficient).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32571092A JPH06175511A (en) | 1992-12-04 | 1992-12-04 | Toner fixing device for electrophotography and the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32571092A JPH06175511A (en) | 1992-12-04 | 1992-12-04 | Toner fixing device for electrophotography and the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06175511A true JPH06175511A (en) | 1994-06-24 |
Family
ID=18179841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32571092A Pending JPH06175511A (en) | 1992-12-04 | 1992-12-04 | Toner fixing device for electrophotography and the like |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06175511A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103995447A (en) * | 2013-02-15 | 2014-08-20 | 京瓷办公信息***株式会社 | Image forming device |
-
1992
- 1992-12-04 JP JP32571092A patent/JPH06175511A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103995447A (en) * | 2013-02-15 | 2014-08-20 | 京瓷办公信息***株式会社 | Image forming device |
| JP2014157218A (en) * | 2013-02-15 | 2014-08-28 | Kyocera Document Solutions Inc | Image forming apparatus |
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