JPH09190112A - Fixing device and image forming device - Google Patents
Fixing device and image forming deviceInfo
- Publication number
- JPH09190112A JPH09190112A JP1810996A JP1810996A JPH09190112A JP H09190112 A JPH09190112 A JP H09190112A JP 1810996 A JP1810996 A JP 1810996A JP 1810996 A JP1810996 A JP 1810996A JP H09190112 A JPH09190112 A JP H09190112A
- Authority
- JP
- Japan
- Prior art keywords
- transfer material
- heating
- fixing device
- conveying means
- developer image
- 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)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、現像剤を加熱によ
り溶融して定着せしめる定着装置及びこの定着装置を備
えた電子写真方式の画像形成装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing device for melting and fixing a developer by heating, and an electrophotographic image forming apparatus equipped with this fixing device.
【0002】[0002]
【従来の技術】従来、電子写真方式の画像形成装置の一
つであるフルカラープリンタは図7に示すように構成さ
れている。図7において、1はレーザースキャナユニッ
トであり、該レーザースキャナユニット1からレーザー
ドライバ(図示せず)のON/OFF信号に基づいて照
射したレーザービームを感光ドラム2上に結像、走査さ
せて、感光ドラム2上に潜像を形成している。2. Description of the Related Art A conventional full-color printer, which is one of electrophotographic image forming apparatuses, is constructed as shown in FIG. In FIG. 7, reference numeral 1 is a laser scanner unit, which forms an image of a laser beam emitted from the laser scanner unit 1 on the basis of an ON / OFF signal of a laser driver (not shown) on the photosensitive drum 2 and scans it, A latent image is formed on the photosensitive drum 2.
【0003】そして、この潜像は、矢印で示すように反
時計回りに回転する現像ロータリユニット3に収容され
た現像カートリッジによって現像される。つまり、各現
像カートリッジ内には、それぞれマゼンタ、シアン、イ
エロー、ブラックの4色のトナーが収容されており、各
現像カートリッジが現像時に感光ドラム2に対して例え
ば300μm程度の一定の間隙を有して対向することに
より、感光ドラム2上の潜像に各トナーを付着させ、例
えばマゼンタ、シアン、イエロー、ブラックの順で現像
する。The latent image is developed by the developing cartridge housed in the developing rotary unit 3 which rotates counterclockwise as shown by the arrow. That is, each developing cartridge contains four color toners of magenta, cyan, yellow, and black, and each developing cartridge has a constant gap of about 300 μm with respect to the photosensitive drum 2 during development. By facing each other, each toner is attached to the latent image on the photosensitive drum 2, and for example, development is performed in the order of magenta, cyan, yellow, and black.
【0004】一方、給紙カセット4に収容されている紙
等の転写材5は、上記工程に伴って給紙カセット4から
供給され、レジストローラ6に挟まれた状態で一旦停止
するが、転写ドラム7に当接した吸着ローラ8によって
転写ドラム7上に静電気が付与され、転写材5は転写ド
ラム7と吸着ローラ8との間を通過した後、静電吸着し
て転写ドラム7に巻き付き、この時点で吸着ローラ8は
転写ドラム7から離れる。On the other hand, the transfer material 5 such as paper accommodated in the paper feed cassette 4 is supplied from the paper feed cassette 4 in the above process, and is temporarily stopped while being sandwiched by the registration rollers 6. Static electricity is applied to the transfer drum 7 by the attraction roller 8 that is in contact with the drum 7, and the transfer material 5 passes between the transfer drum 7 and the attraction roller 8 and then electrostatically attracts and winds around the transfer drum 7. At this point, the suction roller 8 separates from the transfer drum 7.
【0005】このようにして転写ドラム7に巻き付いた
転写材5上に、マゼンタ、シアン、イエロー、ブラック
の各色ごと形成されたトナー像が各色ごとに転写され、
色の重ね合わせによるフルカラー画像が形成される。In this way, the toner image formed for each color of magenta, cyan, yellow, and black is transferred on each color on the transfer material 5 wound around the transfer drum 7,
A full-color image is formed by superimposing colors.
【0006】次に、フルカラー画像の転写が行われた転
写材5は、転写ドラム7に当接した分離爪9により転写
ドラム7から分離され、転写材搬送手段たる定着ローラ
10と加圧ローラ11とを有する定着装置に搬送され
る。Next, the transfer material 5 on which the full-color image has been transferred is separated from the transfer drum 7 by the separating claw 9 which is in contact with the transfer drum 7, and a fixing roller 10 and a pressure roller 11 which are transfer material conveying means. And is conveyed to a fixing device having.
【0007】そして、転写材5上のフルカラートナー画
像は該定着ローラ10と加圧ローラ11によって加熱及
び加圧されることにより転写材5上に定着され、その
後、排紙コロ12を介して機外へ排出される。Then, the full-color toner image on the transfer material 5 is fixed on the transfer material 5 by being heated and pressed by the fixing roller 10 and the pressure roller 11, and after that, the full-color toner image is transferred through the paper discharge roller 12 to the machine. It is discharged to the outside.
【0008】なお、転写工程が終わった転写ドラム7
は、転写クリーナユニット13によて、転写ドラム7に
残留したトナーの回収と転写ドラムのクリーニング、除
電ローラ14にって残留電荷の除去が行われる。The transfer drum 7 after the transfer process is completed.
The transfer cleaner unit 13 collects the toner remaining on the transfer drum 7, cleans the transfer drum, and removes the residual charge by the charge eliminating roller 14.
【0009】以上の全工程で、1枚のフルカラーの画像
形成が行われ、紙等の転写材に色再現性の優れた画像を
形成していた。In all of the above steps, one full-color image was formed, and an image with excellent color reproducibility was formed on a transfer material such as paper.
【0010】[0010]
【発明が解決しようとする課題】しかしながら、上記従
来例では、一般に離型性を良くするため、定着ローラ1
0は金属製のローラ表面にシリコーンゴムをコートして
いるが、転写材5が定着装置を通るときに定着ローラ1
0の熱を奪って温度低下を起こし、シリコーンゴムの熱
伝導率が小さく温度上昇に時間がかかるため、定着ロー
ラ10の1周目と2周目以降で定着温度差が生じること
があった。その結果、定着温度が高ければ光沢も高くな
り、逆に定着温度が低ければ光沢も低くなるので画像光
沢ムラが発生し、見た目が悪くなるとことがあった。例
えば、定着ローラ10内に配設された加熱手段たるハロ
ゲンヒータ(図示せず)の平均電力を220W、ローラ
周速100mm/sec、ニップ部は5〜6m幅程度、
定着温度170℃として、秤量80g/m2 の一般的な
コピー用紙を定着装置50に突入させると、定着ローラ
10の表面温度は1周目と2周目で10℃程低下するこ
とが本実験より得られている。However, in the above-mentioned conventional example, in order to improve the releasability, the fixing roller 1 is generally used.
In No. 0, the surface of the metallic roller is coated with silicone rubber, but when the transfer material 5 passes through the fixing device, the fixing roller 1
Since the heat of 0 is taken to cause a temperature drop, the silicone rubber has a small thermal conductivity and takes a long time to rise in temperature, so that a fixing temperature difference may occur between the first and second rounds of the fixing roller 10. As a result, if the fixing temperature is high, the gloss becomes high, and conversely, if the fixing temperature is low, the gloss becomes low, so that uneven glossiness of the image occurs, and the appearance may deteriorate. For example, an average electric power of a halogen heater (not shown), which is a heating unit disposed in the fixing roller 10, is 220 W, a roller peripheral speed is 100 mm / sec, a nip portion has a width of about 5 to 6 m,
When a fixing temperature of 170 ° C. and a standard copy paper having a basis weight of 80 g / m 2 are thrust into the fixing device 50, the surface temperature of the fixing roller 10 decreases by about 10 ° C. in the first and second laps. Is better obtained.
【0011】そこで、シリコーンゴム層の厚みを薄くす
ることが考えられるが、この場合、定着ニップ部は図8
(A)に示すような状態となり、図8(B)のように、
転写材上のトナーを定着ローラ10が包み込むようにし
て定着する定着効率が良い効果(包み込み効果)が得ら
れなくなり、カラー画像の多重トナー上層の端部では定
着不良を生じることがあった。特に透明転写材を定着し
たとき、オーバーヘッドプロジェクターによりスクリー
ンに投影した場合顕著に現われ、カラー画像の一部が暗
くなる疑似輪郭を生じることがあった。Therefore, it is conceivable to reduce the thickness of the silicone rubber layer. In this case, the fixing nip portion is formed as shown in FIG.
As shown in FIG. 8B, the state becomes as shown in FIG.
The effect of good fixing efficiency (wrapping effect) of fixing the toner on the transfer material by wrapping it in the fixing roller 10 cannot be obtained, and fixing failure may occur at the end of the upper layer of the multiple toner of the color image. In particular, when a transparent transfer material is fixed, it appears remarkably when projected on a screen by an overhead projector, and a pseudo contour in which a part of a color image becomes dark may occur.
【0012】また、温度低下をヒータの温度上昇により
補うことも考えられるが、定着ローラ10の熱容量が大
きいため定着ローラ10の表面の急激な温度上昇は望め
ない。また、性能を向上したヒータに変え急激な温度上
昇を行うと、界面温度の上昇により定着ローラ10の材
質変形、劣化、コスト上昇、耐久、安全性の低下や、金
属製のローラとシリコーンゴムの剥れ、さらには、オー
バーシュート等が生じるがあった。Although it is considered that the temperature decrease is compensated for by the temperature increase of the heater, a rapid temperature increase on the surface of the fixing roller 10 cannot be expected because the heat capacity of the fixing roller 10 is large. Further, when a heater having improved performance is used and the temperature is rapidly raised, the interface temperature rises, resulting in material deformation, deterioration, cost increase, durability and safety deterioration of the fixing roller 10, and metal roller and silicone rubber There were peeling and further overshoot.
【0013】そこで、本発明は、シリコーンゴム層を薄
くすることなく、また、定着ローラに内包したヒータに
よる急激な温度上昇を行うことなく、画像光沢ムラを抑
制することのできる定着装置及び画像形成装置を提供す
ることを目的とする。Therefore, according to the present invention, the fixing device and the image forming apparatus can suppress the uneven glossiness of the image without thinning the silicone rubber layer and without causing a rapid temperature rise by the heater contained in the fixing roller. The purpose is to provide a device.
【0014】[0014]
【課題を解決するための手段】本出願に係る第1の発明
によれば、上記目的は、未定着現像剤像を担持した転写
材を挟持搬送する転写材搬送手段と、該転写材搬送手段
を介して転写材及び未定着現像剤像を加熱せしめる加熱
手段とを有し、転写材を挟持搬送しながら加熱すること
により未定着現像剤像を溶融させて転写材上に定着させ
る定着装置において、上記加熱手段は、少なくとも上記
転写材搬送手段の挟持部よりも転写材搬送方向上流側で
上記転写材搬送手段の転写材との接触面側を加熱する位
置に配設されていることにより達成される。According to the first invention of the present application, the above object is to provide a transfer material transporting means for sandwiching and transporting a transfer material carrying an unfixed developer image, and the transfer material transporting means. And a heating means for heating the transfer material and the unfixed developer image through the sheet, and fixing the fixing material on the transfer material by melting the unfixed developer image by heating while nipping and transporting the transfer material. The heating means is provided at least at a position for heating the contact surface side of the transfer material conveying means with the transfer material at a position upstream of the sandwiching portion of the transfer material conveying means in the transfer material conveying direction. To be done.
【0015】また、本出願に係る第2の発明によれば、
上記目的は、上記第1の発明の加熱手段の他に、転写材
搬送手段の転写材との非接触面側から加熱を行う加熱手
段を備え、上記第1の発明の加熱手段が、転写材が挟持
搬送される際、転写材搬送手段の転写材との接触面が1
周した後に加熱駆動されることにより達成される。According to the second invention of the present application,
In addition to the heating means of the first invention, the above-mentioned object is provided with a heating means for heating from a non-contact surface side of the transfer material conveying means with the transfer material, wherein the heating means of the first invention is a transfer material. When the sheet is nipped and conveyed, the contact surface of the transfer material conveying means with the transfer material is 1
This is achieved by heating after driving.
【0016】さらに、本出願に係る第3の発明によれ
ば、上記目的は、転写材に未定着現像剤像を形成する画
像形成部と、転写材を挟持搬送しながら加熱することに
より未定着現像剤像を溶融させて転写材上に定着させる
定着装置とを備え、該定着装置が、未定着現像剤像を担
持した転写材を挟持搬送する転写材搬送手段と、該転写
材搬送手段を介して転写材及び未定着現像剤像を加熱せ
しめる加熱手段とを有している画像形成装置において、
上記定着装置の加熱手段は、上記転写材搬送手段の挟持
部よりも転写材搬送方向上流側で上記転写材搬送手段の
転写材との接触面側を加熱する位置と、上記転写材搬送
手段の転写材との非接触面側から加熱を行う位置に配設
されており、上記転写材搬送手段の転写材との接触面側
を加熱する位置に配設された加熱手段を、転写材が挟持
搬送される際、転写材搬送手段の転写材との接触面が1
周した後に加熱駆動するように設定された制御手段を備
えたことにより達成される。Further, according to the third invention of the present application, the above-mentioned object is to fix an unfixed image by forming an unfixed developer image on the transfer material and heating the transfer material while sandwiching and conveying the transfer material. A fixing device that melts the developer image and fixes it on the transfer material is provided, and the fixing device includes a transfer material transporting means for sandwiching and transporting the transfer material carrying the unfixed developer image, and the transfer material transporting means. An image forming apparatus having a transfer member and a heating unit for heating the unfixed developer image through
The heating means of the fixing device has a position for heating the contact surface side of the transfer material conveying means with the transfer material on the upstream side in the transfer material conveying direction with respect to the nipping portion of the transfer material conveying means, and a position of the transfer material conveying means. The transfer material is arranged at a position where heating is performed from the non-contact surface side with the transfer material, and the transfer material sandwiches the heating means arranged at a position where the contact surface side with the transfer material of the transfer material conveying means is heated. When being conveyed, the contact surface of the transfer material conveying means with the transfer material is 1
This is achieved by providing a control means set to drive the heating after the circuit is completed.
【0017】また、本出願に係る第4の発明によれば、
上記目的は、上記第1の発明の加熱手段が、転写材搬送
手段の転写材との接触面側だけでなく、転写材搬送手段
の挟持部に突入前の転写材を加熱する位置に配設されて
おり、転写材の該挟持部への突入の前後にわたって加熱
駆動されることにより達成される。According to the fourth aspect of the present invention,
The above-mentioned object is arranged not only on the contact surface side of the transfer material conveying means with the transfer material, but also at the position where the heating means of the transfer material conveying means heats the transfer material before entering the holding portion of the transfer material conveying means. This is achieved by heating and driving the transfer material before and after the transfer material enters the holding portion.
【0018】さらに、本出願に係る第5の発明によれ
ば、上記目的は、転写材に未定着現像剤像を形成する画
像形成部と、転写材を挟持搬送しながら加熱することに
より未定着現像剤像を溶融させて転写材上に定着させる
定着装置とを備え、該定着装置が、未定着現像剤像を担
持した転写材を挟持搬送する転写材搬送手段と、該転写
材搬送手段を介して転写材及び未定着現像剤像を加熱せ
しめる加熱手段とを有している画像形成装置において、
上記定着装置の加熱手段は、上記転写材搬送手段の挟持
部よりも転写材搬送方向上流側で上記転写材搬送手段の
転写材との接触面側を加熱する位置であって、上記転写
材搬送手段の挟持部に突入前の転写材を加熱する位置に
配設されており、該加熱手段を、転写材の該挟持部への
突入の前後にわたって加熱駆動するように設定された制
御手段を備えたことにより達成される。Further, according to the fifth invention of the present application, the above-mentioned object is to fix an unfixed image by forming an unfixed developer image on the transfer material and heating the transfer material while nipping and transporting the transfer material. A fixing device that melts the developer image and fixes it on the transfer material is provided, and the fixing device includes a transfer material transporting means for sandwiching and transporting the transfer material carrying the unfixed developer image, and the transfer material transporting means. An image forming apparatus having a transfer member and a heating unit for heating the unfixed developer image through
The heating means of the fixing device is a position for heating the contact surface side of the transfer material conveying means with the transfer material on the upstream side in the transfer material conveying direction with respect to the nipping portion of the transfer material conveying means. The holding means of the device is provided at a position for heating the transfer material before the plunging, and the heating means is provided with a control means set to drive heating before and after the plunging of the transfer material into the sandwiching portion. Will be achieved.
【0019】また、本出願に係る第6の発明によれば、
上記目的は、未定着現像剤像を担持した転写材を挟持搬
送する転写材搬送手段と、該転写材搬送手段を介して転
写材及び未定着現像剤像を加熱せしめる加熱手段とを有
し、転写材を挟持搬送しながら加熱することにより未定
着現像剤像を溶融させて転写材上に定着させる定着装置
において、上記転写材搬送手段は、転写材を挟持搬送す
る際、転写材との接触面の1周目よりも2周目の方が遅
いスピードで駆動されることにより達成される。According to a sixth aspect of the present invention,
The above object has a transfer material conveying means for sandwiching and conveying a transfer material carrying an unfixed developer image, and a heating means for heating the transfer material and the unfixed developer image via the transfer material conveying means, In a fixing device in which an unfixed developer image is melted and fixed on a transfer material by heating while sandwiching and transferring the transfer material, the transfer material conveying means makes contact with the transfer material when nipping and transferring the transfer material. This is achieved by driving the surface in the second lap at a slower speed than in the first lap.
【0020】さらに、本出願に係る第7の発明によれ
ば、上記目的は、転写材に未定着現像剤像を形成する画
像形成部と、転写材を挟持搬送しながら加熱することに
より未定着現像剤像を溶融させて転写材上に定着させる
定着装置とを備え、該定着装置が、未定着現像剤像を担
持した転写材を挟持搬送する転写材搬送手段と、該転写
材搬送手段を介して転写材及び未定着現像剤像を加熱せ
しめる加熱手段とを有している画像形成装置において、
上記転写材搬送手段を、転写材の挟持搬送時に、転写材
との接触面の1周目よりも2周目の方が遅いスピードで
駆動するように設定された制御手段を備えたことにより
達成される。Further, according to the seventh invention of the present application, the above-mentioned object is to fix an unfixed image by forming an unfixed developer image on the transfer material and heating the transfer material while nipping and transporting the transfer material. A fixing device that melts the developer image and fixes it on the transfer material is provided, and the fixing device includes a transfer material transporting means for sandwiching and transporting the transfer material carrying the unfixed developer image, and the transfer material transporting means. An image forming apparatus having a transfer member and a heating unit for heating the unfixed developer image through
Achieved by providing the transfer material conveying means with a control means set to drive the transfer material at a speed slower in the second lap than in the first lap of the contact surface with the transfer material when the transfer material is nipped and conveyed. To be done.
【0021】また、本出願に係る第8の発明によれば、
上記目的は、未定着現像剤像を担持した転写材を挟持搬
送する転写材搬送手段と、該転写材搬送手段を介して転
写材及び未定着現像剤像を加熱せしめる加熱手段とを有
し、転写材を挟持搬送しながら加熱することにより未定
着現像剤像を溶融させて転写材上に定着させる定着装置
において、上記転写材搬送手段の転写材との接触部の外
周の長さは、規定されている転写材の長さより長いこと
により達成される。According to the eighth aspect of the present invention,
The above object has a transfer material conveying means for sandwiching and conveying a transfer material carrying an unfixed developer image, and a heating means for heating the transfer material and the unfixed developer image via the transfer material conveying means, In a fixing device that melts an unfixed developer image by heating it while sandwiching and transporting the transfer material to fix it on the transfer material, the outer peripheral length of the contact portion of the transfer material transport means with the transfer material is regulated. Is achieved by being longer than the length of the transfer material being used.
【0022】つまり、本出願に係る第1の発明において
は、加熱手段は、少なくとも転写材搬送手段の挟持部よ
りも転写材搬送方向上流側で転写材搬送手段の転写材と
の接触面側を加熱する位置に配設されているので、転写
材搬送手段の転写材との接触面を直接加熱し、転写材及
び現像剤像によって奪われた熱を補う。That is, in the first invention of the present application, the heating means is at least on the upstream side in the transfer material conveying direction of the transfer material conveying means with respect to the contact surface side of the transfer material conveying means with the transfer material. Since it is arranged at a heating position, the contact surface of the transfer material conveying means with the transfer material is directly heated, and the heat taken by the transfer material and the developer image is supplemented.
【0023】また、本出願に係る第2の発明において
は、上記第1の発明の加熱手段の他に、転写材搬送手段
の転写材との非接触面側から加熱を行う加熱手段を備
え、上記第1の発明の加熱手段が、転写材が挟持搬送さ
れる際、転写材搬送手段の転写材との接触面が1周した
後に加熱駆動されるので、この1周のうちに転写材及び
現像剤像によって奪われた熱を直ちに補い、1周目と2
周目とでの温度変化を無くす。Further, in the second invention according to the present application, in addition to the heating means of the first invention, there is provided heating means for heating from the non-contact surface side of the transfer material conveying means with the transfer material, When the transfer material is nipped and conveyed, the heating means of the first aspect of the invention is driven to heat after the contact surface of the transfer material conveying means with the transfer material makes one round. Immediately compensates for the heat lost by the developer image, and the first lap and 2
Eliminates temperature change between the first and second laps.
【0024】さらに、本出願に係る第3の発明において
は、定着装置に、転写材搬送手段の挟持部よりも転写材
搬送方向上流側で転写材搬送手段の転写材との接触面側
を加熱する加熱手段と、転写材搬送手段の転写材との非
接触面側から加熱を行う加熱手段とを備え、画像形成装
置の制御手段により、上記転写材搬送手段の転写材との
接触面側を加熱する加熱手段を、転写材が挟持搬送され
る際、転写材搬送手段の転写材との接触面が1周した後
に加熱駆動せしめるので、この1周のうちに転写材及び
現像剤像によって奪われた熱を直ちに補い、1周目と2
周目とでの温度変化を無くす。Further, in the third invention of the present application, the fixing device is heated on the contact surface side of the transfer material conveying means with the transfer material on the upstream side in the transfer material conveying direction with respect to the nipping portion of the transfer material conveying means. And a heating means for heating from the non-contact surface side of the transfer material conveying means with the transfer material, and the contact surface side of the transfer material conveying means with the transfer material is controlled by the control means of the image forming apparatus. When the transfer material is nipped and conveyed, the heating means for heating is driven to heat after the contact surface of the transfer material conveying means with the transfer material makes one round, so that the transfer material and the developer image are captured within one round. Immediately compensates for the heat that is lost
Eliminates temperature change between the first and second laps.
【0025】また、本出願に係る第4の発明において
は、上記第1の発明の加熱手段が、転写材搬送手段の転
写材との接触面側だけでなく、転写材搬送手段の挟持部
に突入前の転写材を加熱する位置に配設されており、転
写材の該挟持部への突入の前後にわたって加熱駆動され
るので、転写材と転写材搬送手段の温度差が小さくな
り、転写材が転写材搬送手段から奪う熱量を小さくす
る。Further, in the fourth invention of the present application, the heating means of the first invention is provided not only on the contact surface side of the transfer material conveying means with the transfer material but also on the sandwiching portion of the transfer material conveying means. It is arranged at a position to heat the transfer material before the plunging, and is heated and driven before and after the plunging of the transfer material into the nipping portion. Reduces the amount of heat taken from the transfer material conveying means.
【0026】さらに、本出願に係る第5の発明において
は、定着装置に、転写材搬送手段の転写材との接触面側
だけでなく、転写材搬送手段の挟持部に突入前の転写材
を加熱する加熱手段を備え、画像形成装置の制御手段に
より、該加熱手段を転写材の該挟持部への突入の前後に
わたって加熱駆動するので、転写材と転写材搬送手段の
温度差が小さくなり、転写材が転写材搬送手段から奪う
熱量を小さくする。Further, in the fifth invention of the present application, the fixing device is provided with not only the transfer material of the transfer material conveying means, which is in contact with the transfer material, but also the transfer material before being rushed into the nipping portion of the transfer material conveying means. Since the heating means is provided with heating means for heating, and the heating means is driven by the control means of the image forming apparatus before and after the transfer material enters the nip portion, the temperature difference between the transfer material and the transfer material conveying means becomes small, The amount of heat taken by the transfer material from the transfer material conveying means is reduced.
【0027】また、本出願に係る第6の発明によれば、
転写材搬送手段は、転写材を挟持搬送する際、転写材と
の接触面の1周目よりも2周目の方が遅いスピードで駆
動されるので、2周目における画像光沢度を低下させな
い。According to the sixth invention of the present application,
When the transfer material is nipped and conveyed, the transfer material conveying means is driven at a speed slower in the second rotation than in the first rotation of the contact surface with the transfer material, so that the image glossiness in the second rotation is not reduced. .
【0028】さらに、本出願に係る第7の発明において
は、定着装置の転写材搬送手段を、画像形成装置の制御
手段により、転写材を挟持搬送する際、転写材との接触
面の1周目よりも2周目の方が遅いスピードで駆動する
ので、2周目における画像光沢度を低下させない。Further, in the seventh invention of the present application, when the transfer material conveying means of the fixing device is nipped and conveyed by the control means of the image forming apparatus, the transfer material conveying means makes one round of the contact surface with the transfer material. Since the second lap drives at a slower speed than the second lap, the image glossiness in the second lap is not reduced.
【0029】また、本出願に係る第6の発明において
は、転写材搬送手段の転写材との接触部の外周の長さ
を、規定されている転写材の長さより長くしたので、転
写材の定着は転写材搬送手段の該転写材との接触面が1
周するうちに終了するので、転写材によって熱を奪われ
た部分によって定着が行われることがなく光沢ムラを発
生させない。Further, in the sixth aspect of the present application, the length of the outer circumference of the contact portion of the transfer material conveying means with the transfer material is made longer than the prescribed length of the transfer material. For fixing, the contact surface of the transfer material conveying means with the transfer material is 1
Since the process is completed during the circumference, fixing is not performed by the portion where heat is taken by the transfer material, and uneven gloss does not occur.
【0030】[0030]
【発明の実施の形態】以下、本発明の実施の形態を添付
図面に基づいて説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings.
【0031】(第1の実施形態)まず、本発明の第1の
実施の形態を図1及び図2に基づいて説明する。本実施
形態の画像形成装置は図2に示すように従来例と同様な
電子写真方式のプリンタであるが、定着ローラ10の外
側にもヒータ16が設けられているところが従来例と異
なる。なお、従来例との共通箇所には同一符号を付して
説明を省略する。(First Embodiment) First, a first embodiment of the present invention will be described with reference to FIGS. 1 and 2. The image forming apparatus of the present embodiment is an electrophotographic printer similar to the conventional example as shown in FIG. 2, but differs from the conventional example in that a heater 16 is provided outside the fixing roller 10. In addition, the same reference numerals are given to the common parts with the conventional example, and the description is omitted.
【0032】図1は本発明の第1の実施形態における定
着装置を示す図であり、同図においては10は転写材搬
送手段たる定着ローラであり、該定着ローラ10は、カ
ラー画像の単色から四色の多重のトナーの厚さ(数μm
〜数十μm)に対処するためにアルミニウム等の芯金に
シリコーンゴム等の弾性層が数十μm以上設けられてい
る。FIG. 1 is a diagram showing a fixing device according to a first embodiment of the present invention. In FIG. 1, 10 is a fixing roller which is a transfer material conveying means. Thickness of multiple toner of four colors (several μm
In order to cope with this, an elastic layer of silicone rubber or the like is provided on a core metal of aluminum or the like of several tens of μm or more.
【0033】この定着ローラ10には同じく転写材搬送
手段たる加圧ローラ11が圧接するように配設されてお
り、互いに回転しながら圧接部で転写材5を挟持搬送す
るが、定着ローラ10及び加圧ローラ11の内部には、
加熱手段たるハロゲンヒータ15が配設されているた
め、転写材5及び転写材5上の未定着現像剤像は、加圧
及び加熱を受け、定着されて排紙される。A pressure roller 11, which is a transfer material conveying means, is also arranged in pressure contact with the fixing roller 10, and the transfer material 5 is nipped and conveyed by the pressure contact portion while rotating with each other. Inside the pressure roller 11,
Since the halogen heater 15, which is a heating unit, is provided, the transfer material 5 and the unfixed developer image on the transfer material 5 are pressed and heated to be fixed and discharged.
【0034】従って、定着ローラ10の熱は、転写材5
及び転写材5上の現像剤像によって奪われ、温度低下を
起こし、定着ローラ10の1周目と2周目で温度差を生
ずることがある。Therefore, the heat of the fixing roller 10 is applied to the transfer material 5
In addition, the developer image on the transfer material 5 may be deprived of the toner, resulting in a decrease in temperature and a temperature difference between the first and second laps of the fixing roller 10.
【0035】そこで、本実施形態では、補助的な加熱手
段としてヒータ16を、熱効率等の理由から定着ローラ
10の表面の転写材突入側に配置し、また、定着ローラ
10の表面のシリコーンゴムの変形、劣化等を防止する
ため、定着ローラ10の表面温度が200℃以下になる
ように設定する。Therefore, in this embodiment, the heater 16 is arranged as an auxiliary heating means on the transfer material rushing side of the surface of the fixing roller 10 for reasons such as thermal efficiency, and the silicone rubber on the surface of the fixing roller 10 is used. In order to prevent deformation and deterioration, the surface temperature of the fixing roller 10 is set to 200 ° C. or lower.
【0036】そして、この定着ローラ10付近に設置し
た補助的なヒータ16を、定着ローラ10が1周し終え
たタイミングで点灯させることにより、定着ローラ10
の表面を加熱する。これにより、転写材5及び現像剤像
により奪われた熱量を定着ローラ10の表面に直接与
え、定着ローラ10の1周目と2周目の定着温度の変化
を抑えることにより光沢ムラを防止できる。Then, the auxiliary heater 16 installed in the vicinity of the fixing roller 10 is turned on at the timing when the fixing roller 10 has completed one revolution, whereby the fixing roller 10 is turned on.
Heat the surface. As a result, the amount of heat taken by the transfer material 5 and the developer image is directly applied to the surface of the fixing roller 10 to suppress the change in the fixing temperature between the first and second rounds of the fixing roller 10, thereby preventing uneven gloss. .
【0037】なお、補助的なヒータ16は、ハロゲンヒ
ータ、セラミックヒータ、電熱線等でも良い。The auxiliary heater 16 may be a halogen heater, a ceramic heater, a heating wire or the like.
【0038】また、ヒータ15及びヒータ16の制御手
段としては、公知のCPU等を用いれば良く、制御手段
は定着装置側に配設しても、画像形成装置本体側に配設
しても良い。A well-known CPU or the like may be used as the control means for the heater 15 and the heater 16, and the control means may be provided on the fixing device side or the image forming apparatus main body side. .
【0039】(第2の実施形態)次に、本発明の第2の
実施形態を図3に基づいて説明する。なお、第1の実施
形態との共通箇所には同一符号を付して説明を省略す
る。(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIG. The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.
【0040】図3は本発明の第2の実施形態における定
着装置を示す図であり、同図に示すように、本実施形態
は、定着ローラ10の加熱手段であるヒータ17を定着
ローラ10の外側に設け、転写材5と定着ローラ10の
表面を加熱するようにしたものである。FIG. 3 is a view showing a fixing device according to a second embodiment of the present invention. As shown in FIG. 3, in this embodiment, the heater 17 which is a heating means of the fixing roller 10 is attached to the fixing roller 10. It is provided outside to heat the surfaces of the transfer material 5 and the fixing roller 10.
【0041】このヒータ17により、定着ローラ10の
表面温度を例えば170℃に、また転写材5の表面温度
をトナーの融解点、例えば65℃付近になるように設定
する。The heater 17 sets the surface temperature of the fixing roller 10 to 170 ° C. and the surface temperature of the transfer material 5 to the melting point of the toner, for example, around 65 ° C.
【0042】これにより、第1の実施形態の効果に加
え、転写材5と定着ローラ10の温度差が小さくなるこ
とで、転写材5が定着ローラ10の表面から奪う熱量を
小さくし、定着ローラ10の1周目と2周目の定着温度
の変化を抑えることにより光沢ムラを防止できる。As a result, in addition to the effects of the first embodiment, the temperature difference between the transfer material 5 and the fixing roller 10 becomes small, so that the amount of heat taken by the transfer material 5 from the surface of the fixing roller 10 can be made small, and the fixing roller can be made small. By suppressing the change in the fixing temperature between the first and second rounds of No. 10, uneven gloss can be prevented.
【0043】さらに、定着時転写材5に急激な温度上昇
が起き、転写材5に含まれていた水分が水蒸気となり、
定着前のトナーを吹き飛ばし画像を乱す現象を同様の理
由から防ぐことができる。Furthermore, the temperature of the transfer material 5 suddenly rises during fixing, and the moisture contained in the transfer material 5 becomes water vapor,
For the same reason, it is possible to prevent the phenomenon that the toner before being fixed is blown off and the image is disturbed.
【0044】なお、ヒータは、ハロゲンヒータ、セラミ
ックヒータ、電熱線等でも良い。The heater may be a halogen heater, a ceramic heater, a heating wire or the like.
【0045】また、ヒータ17の制御手段としては、公
知のCPU等を用いれば良く、制御手段は定着装置側に
配設しても、画像形成装置本体側に配設しても良い。A known CPU or the like may be used as the control means for the heater 17, and the control means may be provided on the fixing device side or the image forming apparatus main body side.
【0046】(第3の実施形態)次に、本発明の第3の
実施形態を図4及び図5に基づいて説明する。なお、第
1の実施形態との共通箇所には同一符号を付して説明を
省略する。(Third Embodiment) Next, a third embodiment of the present invention will be described with reference to FIGS. The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.
【0047】図4は本発明の第3の実施形態に係る図面
であり、同図において、18は定着用モータコントロー
ル回路、19は定着用モータであり、該定着用モータ1
9により公知の駆動伝達手段を用いて定着ローラ10を
回転駆動するようになっている。なお、加圧ローラ11
は定着ローラ10に従動回転するようになっている。FIG. 4 is a drawing according to a third embodiment of the present invention. In FIG. 4, 18 is a fixing motor control circuit, 19 is a fixing motor, and the fixing motor 1
9, the fixing roller 10 is rotationally driven by using a known drive transmission means. The pressure roller 11
Is rotated by the fixing roller 10.
【0048】図5は、通紙実験を行ったときの定着スピ
ードに対する光沢ムラの関係を示しており、本実施形態
においては、この関係に基づいて定着スピードを制御す
るようにしたものである。FIG. 5 shows a relationship between the gloss unevenness and the fixing speed when a paper passing experiment is performed. In this embodiment, the fixing speed is controlled based on this relationship.
【0049】つまり、転写材が定着装置に突入すると、
定着用モータコントロール回路18により、定着ローラ
10の1周目よりも2周目の定着スピードを抑制するこ
とにより、1周目に温度が低下しても2周目において転
写材及び現像剤に十分な熱を付与し、光沢ムラを防止す
る。That is, when the transfer material plunges into the fixing device,
The fixing motor control circuit 18 suppresses the fixing speed of the fixing roller 10 in the second lap rather than in the first lap so that even if the temperature decreases in the first lap, the fixing material is sufficient for the transfer material and the developer in the second lap. Applying sufficient heat to prevent uneven gloss.
【0050】なお、制御手段たる定着用モータコントロ
ール回路は、定着装置側に配設しても、画像形成装置本
体側に配設しても良い。The fixing motor control circuit as the control means may be arranged on the fixing device side or the image forming apparatus main body side.
【0051】(第4の実施形態)次に、本発明の第4の
実施形態を図6に基づいて説明する。なお、第1の実施
形態との共通箇所には同一符号を付して説明を省略す
る。(Fourth Embodiment) Next, a fourth embodiment of the present invention will be described with reference to FIG. The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.
【0052】図6は本発明の第4の実施形態に定着装置
を示す図であり、同図に示すように、本実施形態の定着
ローラ10の外周は、規定されている転写材の長さより
大きくなっている。A4紙縦送りの画像形成装置の場
合、定着ローラ10の外周がA4紙縦の長さ297mm
より大きければ良い。この条件を満たすとき、転写材は
定着ローラ10が1周する内に定着が行われるので光沢
ムラを防止できる。FIG. 6 is a diagram showing a fixing device according to a fourth embodiment of the present invention. As shown in FIG. 6, the outer circumference of the fixing roller 10 of the present embodiment is larger than the prescribed length of the transfer material. It is getting bigger. In the case of an image forming apparatus that feeds A4 paper vertically, the outer circumference of the fixing roller 10 is 297 mm in the length of A4 paper.
It is better if it is larger. When this condition is satisfied, the transfer material is fixed within one revolution of the fixing roller 10, so uneven gloss can be prevented.
【0053】また、転写材を連続通紙する場合、常に定
着ローラのある位置に転写材が突入するように、定着ロ
ーラの周長、周速、紙間等を設定することで、定着の均
一化を図ることができる。Further, when the transfer material is continuously fed, the peripheral length of the fixing roller, the peripheral speed, the paper interval, etc. are set so that the transfer material always rushes to the position where the fixing roller is provided, so that the fixing is uniform. Can be realized.
【0054】なお、上記の各実施形態においては、定着
装置の転写材搬送手段として定着ローラを用いたが、特
開昭63−313182号公報、特開平2−15787
8号公報、特開平4−44075〜44083号公報等
に開示のように、転写材搬送手段として耐熱性フィルム
を用い、耐熱性のフィルムの一面側に加熱手段を、他面
側に転写材を密着させて転写材をフィルムと共に走行移
動させて加熱手段の熱エネルギーをフィルムを介して転
写材及び該転写材上の現像剤像に付与する方式の定着装
置にも、本発明は適用できる。In each of the above-mentioned embodiments, the fixing roller is used as the transfer material conveying means of the fixing device, but it is disclosed in JP-A-63-313182 and JP-A-2-15787.
As disclosed in JP-A No. 8 and JP-A-4-44075 to 44083, a heat-resistant film is used as a transfer material conveying means, a heating means is provided on one side of the heat-resistant film, and a transfer material is provided on the other side. The present invention can also be applied to a fixing device of a type in which the transfer material is moved in contact with the transfer material along with the film to apply the thermal energy of the heating means to the transfer material and the developer image on the transfer material via the film.
【0055】[0055]
【発明の効果】以上説明したように、本出願に係る第1
の発明によれば、加熱手段を、少なくとも転写材搬送手
段の挟持部よりも転写材搬送方向上流側で転写材搬送手
段の転写材との接触面側を加熱する位置に配設したの
で、転写材及び現像剤像によって奪われた熱を補い、光
沢ムラを防ぐことができる。As described above, the first embodiment according to the present application is described.
According to the invention, since the heating means is arranged at a position for heating at least the contact surface side of the transfer material conveying means with the transfer material at the upstream side in the transfer material conveying direction with respect to the nipping portion of the transfer material conveying means, It is possible to supplement the heat taken by the material and the developer image and prevent uneven gloss.
【0056】また、本出願に係る第2の発明によれば、
上記第1の発明の加熱手段の他に、転写材搬送手段の転
写材との非接触面側から加熱を行う加熱手段を備え、上
記第1の発明の加熱手段が、転写材が挟持搬送される
際、転写材搬送手段の転写材との接触面が1周した後に
加熱駆動するようにしたので、この1周のうちに転写材
及び現像剤像によって奪われた熱を直ちに補い、1周目
と2周目との温度差を小さくして光沢ムラを防止するこ
とができる。According to the second invention of the present application,
In addition to the heating means of the first invention, a heating means for heating the transfer material conveying means from the non-contact surface side of the transfer material is provided, and the heating means of the first invention nips and conveys the transfer material. In this case, since the contact surface of the transfer material conveying means with the transfer material makes one revolution, the heating is driven, so that the heat taken by the transfer material and the developer image is immediately compensated for in one revolution. It is possible to prevent uneven glossiness by reducing the temperature difference between the second eye and the second round.
【0057】さらに、本出願に係る第3の発明によれ
ば、定着装置に、転写材搬送手段の挟持部よりも転写材
搬送方向上流側で転写材搬送手段の転写材との接触面側
を加熱する加熱手段と、転写材搬送手段の転写材との非
接触面側から加熱を行う加熱手段とを備え、画像形成装
置の制御手段により、上記転写材搬送手段の転写材との
接触面側を加熱する加熱手段を、転写材が挟持搬送され
る際、転写材搬送手段の転写材との接触面が1周した後
に加熱駆動せしめるので、この1周のうちに転写材及び
現像剤像によって奪われた熱を直ちに補い、1周目と2
周目とでの温度変化を無くして光沢ムラを防ぐことがで
きる。Further, according to the third invention of the present application, in the fixing device, the contact surface side of the transfer material conveying means with the transfer material is located on the upstream side in the transfer material conveying direction with respect to the nipping portion of the transfer material conveying means. A heating means for heating and a heating means for heating from the non-contact surface side of the transfer material conveying means with the transfer material are provided, and the contact surface side of the transfer material conveying means with the transfer material is controlled by the control means of the image forming apparatus. When the transfer material is nipped and conveyed, the heating means for heating the sheet is heated and driven after the contact surface of the transfer material conveying means with the transfer material makes one round. Immediately supplement the heat taken away, and the first lap and 2
It is possible to prevent uneven glossiness by eliminating the temperature change between the first and second rounds.
【0058】また、本出願に係る第4の発明によれば、
上記第1の発明の加熱手段を、転写材搬送手段の転写材
との接触面側だけでなく、転写材搬送手段の挟持部に突
入前の転写材を加熱する位置に配設して、転写材の該挟
持部への突入の前後にわたって加熱駆動するので、転写
材と転写材搬送手段の温度差が小さくなり、転写材が転
写材搬送手段から奪う熱量を小さくして光沢ムラを防ぐ
ことができる。さらに、定着時に転写材に急激な温度上
昇が起き、転写材に含まれていた水分が水蒸気となり、
定着前のトナーを吹き飛ばし画像を乱す現象も防ぐこと
ができる。According to the fourth invention of the present application,
The heating means of the first invention is arranged not only on the contact surface side of the transfer material conveying means with the transfer material but also at a position for heating the transfer material before entering the holding portion of the transfer material conveying means. Since the heating is driven before and after the material rushes into the holding portion, the temperature difference between the transfer material and the transfer material conveying means becomes small, and the amount of heat taken by the transfer material from the transfer material conveying means can be reduced to prevent uneven gloss. it can. Furthermore, the temperature of the transfer material suddenly rises during fixing, and the water contained in the transfer material becomes water vapor.
It is also possible to prevent the phenomenon that the toner before being fixed is blown off and the image is disturbed.
【0059】さらに、本出願に係る第5の発明において
は、定着装置に、転写材搬送手段の転写材との接触面側
だけでなく、転写材搬送手段の挟持部に突入前の転写材
を加熱する加熱手段を備え、画像形成装置の制御手段に
より、該加熱手段を転写材の該挟持部への突入の前後に
わたって加熱駆動するので、転写材と転写材搬送手段の
温度差が小さくなり、転写材が転写材搬送手段から奪う
熱量を小さくして光沢ムラを防ぐことができる。さら
に、定着時に転写材に急激な温度上昇が起き、転写材に
含まれていた水分が水蒸気となり、定着前のトナーを吹
き飛ばし画像を乱す現象も防ぐことができる。Further, in the fifth aspect of the present invention, the fixing device is provided with not only the transfer material of the transfer material conveying means, which is in contact with the transfer material, but also the transfer material before being rushed into the nipping portion of the transfer material conveying means. Since the heating means is provided with heating means for heating, and the heating means is driven by the control means of the image forming apparatus before and after the transfer material enters the nip portion, the temperature difference between the transfer material and the transfer material conveying means becomes small, The amount of heat taken by the transfer material from the transfer material transporting means can be reduced to prevent uneven gloss. Further, it is possible to prevent a phenomenon in which the temperature of the transfer material suddenly rises at the time of fixing, the moisture contained in the transfer material becomes water vapor, and the toner before fixing is blown off to disturb the image.
【0060】また、本出願に係る第6の発明によれば、
転写材搬送手段は、転写材を挟持搬送する際、転写材と
の接触面の1周目よりも2周目の方が遅いスピードで駆
動されるので、2周目における画像光沢度の低下を防
ぎ、光沢ムラを防ぐことができる。According to the sixth invention of the present application,
When the transfer material is nipped and conveyed, the transfer material conveying means is driven at a speed slower in the second lap than in the first lap of the contact surface with the transfer material, so that the image glossiness in the second lap is lowered. It can prevent uneven gloss.
【0061】さらに、本出願に係る第7の発明において
は、定着装置の転写材搬送手段を、画像形成装置の制御
手段により、転写材を挟持搬送する際、転写材との接触
面の1周目よりも2周目の方が遅いスピードで駆動する
ので、2周目における画像光沢度を低下を防ぎ、光沢ム
ラを防ぐことができる。Further, in the seventh invention of the present application, when the transfer material conveying means of the fixing device is nipped and conveyed by the control means of the image forming apparatus, the transfer material conveying means makes one round of the contact surface with the transfer material. Since the second lap is driven at a slower speed than the second lap, it is possible to prevent the image glossiness in the second lap from decreasing and prevent uneven gloss.
【0062】また、本出願に係る第6の発明において
は、転写材搬送手段の転写材との接触部の外周の長さ
を、規定されている転写材の長さより長くしたので、転
写材の定着は転写材搬送手段の該転写材との接触面が1
周するうちに終了するので、転写材によって熱を奪われ
た部分によって定着が行われることがなく光沢ムラを防
ぐことができる。さらに、定着スピードの高速化も可能
となる。Further, in the sixth aspect of the present application, the outer peripheral length of the contact portion of the transfer material conveying means with the transfer material is made longer than the prescribed length of the transfer material. For fixing, the contact surface of the transfer material conveying means with the transfer material is 1
Since the process is completed during the circumference, fixing is not performed by a portion where heat is taken by the transfer material, and uneven gloss can be prevented. Further, the fixing speed can be increased.
【図1】本発明の第1の実施形態における定着装置の模
式図である。FIG. 1 is a schematic diagram of a fixing device according to a first embodiment of the present invention.
【図2】本発明の第1の実施形態における画像形成装置
の模式図である。FIG. 2 is a schematic diagram of an image forming apparatus according to the first embodiment of the present invention.
【図3】本発明の第2の実施形態における定着装置の模
式図である。FIG. 3 is a schematic diagram of a fixing device according to a second embodiment of the present invention.
【図4】本発明の第3の実施形態における定着モータ制
御のブロック図である。FIG. 4 is a block diagram of fixing motor control according to a third embodiment of the present invention.
【図5】本発明の第3の実施形態における定着スピード
と光沢度の関係を示す図である。FIG. 5 is a diagram showing a relationship between fixing speed and glossiness in a third embodiment of the present invention.
【図6】本発明の第4の実施形態における定着装置の模
式図である。FIG. 6 is a schematic diagram of a fixing device according to a fourth embodiment of the present invention.
【図7】従来の画像形成装置の模式図である。FIG. 7 is a schematic diagram of a conventional image forming apparatus.
【図8】包み込み効果を説明する図である。FIG. 8 is a diagram illustrating a wrapping effect.
5 転写材 10 定着ローラ(転写材搬送手段) 11 加圧ローラ(転写材搬送手段) 15 ヒータ(転写材搬送手段の転写材との非接触面側
から加熱する加熱手段) 16 ヒータ(転写材搬送手段の転写材との接触面側か
ら加熱する加熱手段) 17 ヒータ(転写材搬送手段の転写材との接触面側か
ら転写材搬送手段及び転写材を加熱する加熱手段) 18 定着モータコントローラ(転写材搬送手段のスピ
ードの制御手段)5 Transfer Material 10 Fixing Roller (Transfer Material Conveying Means) 11 Pressure Roller (Transfer Material Conveying Means) 15 Heater (Heating Means Heating from Non-Contact Surface Side of Transfer Material Conveying Means with Transfer Material) 16 Heater (Transfer Material Conveying) Heating means for heating from the contact surface side of the transfer material with the transfer material) 17 Heater (heating means for heating the transfer material conveying means and the transfer material from the contact surface side of the transfer material conveying means with the transfer material) 18 Fixing motor controller (transfer) Control means for speed of material conveying means)
Claims (8)
搬送する転写材搬送手段と、該転写材搬送手段を介して
転写材及び未定着現像剤像を加熱せしめる加熱手段とを
有し、転写材を挟持搬送しながら加熱することにより未
定着現像剤像を溶融させて転写材上に定着させる定着装
置において、上記加熱手段は、少なくとも上記転写材搬
送手段の挟持部よりも転写材搬送方向上流側で上記転写
材搬送手段の転写材との接触面側を加熱する位置に配設
されていることを特徴とする定着装置。1. A transfer material carrying means for sandwiching and carrying a transfer material carrying an unfixed developer image, and a heating means for heating the transfer material and the unfixed developer image via the transfer material carrying means. In a fixing device that melts and fixes an unfixed developer image on a transfer material by heating the transfer material while sandwiching and transporting the transfer material, the heating means transports the transfer material more than at least the sandwiching portion of the transfer material transporting means A fixing device, characterized in that the fixing device is arranged at a position upstream of the transfer material conveying means for heating the contact surface side of the transfer material conveying means with the transfer material.
材搬送手段の転写材との非接触面側から加熱を行う加熱
手段を備え、請求項1に記載の加熱手段は、転写材が挟
持搬送される際、転写材搬送手段の転写材との接触面が
1周した後に加熱駆動されることとする請求項1に記載
の定着装置。2. In addition to the heating means according to claim 1, a heating means for heating from a non-contact surface side of the transfer material conveying means with the transfer material is provided, and the heating means according to claim 1, The fixing device according to claim 1, wherein when the material is nipped and conveyed, heating is driven after the contact surface of the transfer material conveying means with the transfer material makes one round.
形成部と、転写材を挟持搬送しながら加熱することによ
り未定着現像剤像を溶融させて転写材上に定着させる定
着装置とを備え、該定着装置が、未定着現像剤像を担持
した転写材を挟持搬送する転写材搬送手段と、該転写材
搬送手段を介して転写材及び未定着現像剤像を加熱せし
める加熱手段とを有している画像形成装置において、上
記定着装置の加熱手段は、上記転写材搬送手段の挟持部
よりも転写材搬送方向上流側で上記転写材搬送手段の転
写材との接触面側を加熱する位置と、上記転写材搬送手
段の転写材との非接触面側から加熱を行う位置に配設さ
れており、上記転写材搬送手段の転写材との接触面側を
加熱する位置に配設された加熱手段を、転写材が挟持搬
送される際、転写材搬送手段の転写材との接触面が1周
した後に加熱駆動するように設定された制御手段を備え
たことを特徴とする画像形成装置。3. An image forming section for forming an unfixed developer image on a transfer material, and a fixing device for melting the unfixed developer image by heating while heating the transfer material while sandwiching and fixing it on the transfer material. The fixing device includes a transfer material conveying means for sandwiching and conveying a transfer material carrying an unfixed developer image, and a heating means for heating the transfer material and the unfixed developer image via the transfer material conveying means. In the image forming apparatus having the above, the heating means of the fixing device heats the contact surface side of the transfer material conveying means with the transfer material on the upstream side in the transfer material conveying direction with respect to the nipping portion of the transfer material conveying means. And a position for heating from the non-contact surface side of the transfer material conveying means with the transfer material, and a position for heating the contact surface side of the transfer material conveying means with the transfer material. When the transfer material is nipped and conveyed by the heated heating means, the transfer material is An image forming apparatus comprising: a control unit that is set to drive heating after the contact surface of the transfer unit with the transfer material makes one round.
送手段の転写材との接触面側だけでなく、転写材搬送手
段の挟持部に突入前の転写材を加熱する位置に配設され
ており、転写材の該挟持部への突入の前後にわたって加
熱駆動されることとする請求項1に記載の定着装置。4. The heating means according to claim 1 is arranged not only on the contact surface side of the transfer material conveying means with the transfer material, but also at a position for heating the transfer material before entering the holding portion of the transfer material conveying means. The fixing device according to claim 1, wherein the fixing device is provided and is heated and driven before and after the transfer material is thrust into the holding portion.
形成部と、転写材を挟持搬送しながら加熱することによ
り未定着現像剤像を溶融させて転写材上に定着させる定
着装置とを備え、該定着装置が、未定着現像剤像を担持
した転写材を挟持搬送する転写材搬送手段と、該転写材
搬送手段を介して転写材及び未定着現像剤像を加熱せし
める加熱手段とを有している画像形成装置において、上
記定着装置の加熱手段は、上記転写材搬送手段の挟持部
よりも転写材搬送方向上流側で上記転写材搬送手段の転
写材との接触面側を加熱する位置であって、上記転写材
搬送手段の挟持部に突入前の転写材を加熱する位置に配
設されており、該加熱手段を、転写材の該挟持部への突
入の前後にわたって加熱駆動するように設定された制御
手段を備えたことを特徴とする画像形成装置。5. An image forming portion for forming an unfixed developer image on a transfer material, and a fixing device for melting the unfixed developer image by heating while heating the transfer material while sandwiching and fixing the image on the transfer material. The fixing device includes a transfer material conveying means for sandwiching and conveying a transfer material carrying an unfixed developer image, and a heating means for heating the transfer material and the unfixed developer image via the transfer material conveying means. In the image forming apparatus having the above, the heating means of the fixing device heats the contact surface side of the transfer material conveying means with the transfer material on the upstream side in the transfer material conveying direction with respect to the nipping portion of the transfer material conveying means. And a position for heating the transfer material before the transfer material is conveyed to the nipping portion of the transfer material conveying means, and the heating means is driven to heat the transfer material before and after the transfer material enters the nipping portion. To have a control means set to A characteristic image forming apparatus.
搬送する転写材搬送手段と、該転写材搬送手段を介して
転写材及び未定着現像剤像を加熱せしめる加熱手段とを
有し、転写材を挟持搬送しながら加熱することにより未
定着現像剤像を溶融させて転写材上に定着させる定着装
置において、上記転写材搬送手段は、転写材を挟持搬送
する際、転写材との接触面の1周目よりも2周目の方が
遅いスピードで駆動されることを特徴とする定着装置。6. A transfer material carrying means for sandwiching and carrying a transfer material carrying an unfixed developer image, and a heating means for heating the transfer material and the unfixed developer image via the transfer material carrying means. In a fixing device that melts an unfixed developer image by heating it while sandwiching and transporting the transfer material to fix the transfer material on the transfer material, the transfer material transporting unit transfers the transfer material to the transfer material when sandwiching and transporting the transfer material. The fixing device is characterized in that the contact surface is driven at a slower speed on the second lap than on the first lap.
形成部と、転写材を挟持搬送しながら加熱することによ
り未定着現像剤像を溶融させて転写材上に定着させる定
着装置とを備え、該定着装置が、未定着現像剤像を担持
した転写材を挟持搬送する転写材搬送手段と、該転写材
搬送手段を介して転写材及び未定着現像剤像を加熱せし
める加熱手段とを有している画像形成装置において、上
記転写材搬送手段を、転写材の挟持搬送時に、転写材と
の接触面の1周目よりも2周目の方が遅いスピードで駆
動するように設定された制御手段を備えたことを特徴と
する画像形成装置。7. An image forming portion for forming an unfixed developer image on a transfer material, and a fixing device for melting the unfixed developer image by heating while heating the transfer material while sandwiching the transfer material. The fixing device includes a transfer material conveying means for sandwiching and conveying a transfer material carrying an unfixed developer image, and a heating means for heating the transfer material and the unfixed developer image via the transfer material conveying means. In the image forming apparatus having the above-mentioned configuration, the transfer material conveying means is set to be driven at a speed slower in the second lap than in the first lap of the contact surface with the transfer material when the transfer material is nipped and conveyed. An image forming apparatus comprising the control means described above.
搬送する転写材搬送手段と、該転写材搬送手段を介して
転写材及び未定着現像剤像を加熱せしめる加熱手段とを
有し、転写材を挟持搬送しながら加熱することにより未
定着現像剤像を溶融させて転写材上に定着させる定着装
置において、上記転写材搬送手段の転写材との接触部の
外周の長さは、規定されている転写材の長さより長いこ
とを特徴とする定着装置。8. A transfer material carrying means for sandwiching and carrying a transfer material carrying an unfixed developer image, and a heating means for heating the transfer material and the unfixed developer image via the transfer material carrying means. In a fixing device that melts an unfixed developer image by heating it while sandwiching and transporting the transfer material to fix it on the transfer material, the outer peripheral length of the contact portion of the transfer material transporting means with the transfer material is A fixing device characterized in that it is longer than the specified length of the transfer material.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1810996A JPH09190112A (en) | 1996-01-09 | 1996-01-09 | Fixing device and image forming device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1810996A JPH09190112A (en) | 1996-01-09 | 1996-01-09 | Fixing device and image forming device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH09190112A true JPH09190112A (en) | 1997-07-22 |
Family
ID=11962457
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1810996A Pending JPH09190112A (en) | 1996-01-09 | 1996-01-09 | Fixing device and image forming device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH09190112A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6061544A (en) * | 1998-11-20 | 2000-05-09 | Eastman Kodak Company | Maximizing image gloss uniformity by minimizing the effect of temperature droop in a fuser for reproduction apparatus |
JP2006313234A (en) * | 2005-05-09 | 2006-11-16 | Konica Minolta Business Technologies Inc | Image forming apparatus |
JP2006330253A (en) * | 2005-05-25 | 2006-12-07 | Konica Minolta Business Technologies Inc | Image forming apparatus |
US7251427B2 (en) | 2003-02-18 | 2007-07-31 | Canon Kabushiki Kaisha | Heating apparatus |
JP2007206327A (en) * | 2006-02-01 | 2007-08-16 | Canon Inc | Heating device, control method for heating device and image forming apparatus |
KR100846700B1 (en) * | 2006-11-16 | 2008-07-16 | 주식회사 에이팩 | Heating roller with heater of far infrared ray |
-
1996
- 1996-01-09 JP JP1810996A patent/JPH09190112A/en active Pending
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6061544A (en) * | 1998-11-20 | 2000-05-09 | Eastman Kodak Company | Maximizing image gloss uniformity by minimizing the effect of temperature droop in a fuser for reproduction apparatus |
US7251427B2 (en) | 2003-02-18 | 2007-07-31 | Canon Kabushiki Kaisha | Heating apparatus |
US7504605B2 (en) | 2003-02-18 | 2009-03-17 | Canon Kabushiki Kaisha | Heating apparatus |
US9040877B2 (en) | 2003-02-18 | 2015-05-26 | Canon Kabushiki Kaisha | Heating apparatus |
JP2006313234A (en) * | 2005-05-09 | 2006-11-16 | Konica Minolta Business Technologies Inc | Image forming apparatus |
JP2006330253A (en) * | 2005-05-25 | 2006-12-07 | Konica Minolta Business Technologies Inc | Image forming apparatus |
JP4714893B2 (en) * | 2005-05-25 | 2011-06-29 | コニカミノルタビジネステクノロジーズ株式会社 | Image forming apparatus |
JP2007206327A (en) * | 2006-02-01 | 2007-08-16 | Canon Inc | Heating device, control method for heating device and image forming apparatus |
KR100846700B1 (en) * | 2006-11-16 | 2008-07-16 | 주식회사 에이팩 | Heating roller with heater of far infrared ray |
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