JP2740207B2 - Fixing heating element, fixing device and office equipment - Google Patents
Fixing heating element, fixing device and office equipmentInfo
- Publication number
- JP2740207B2 JP2740207B2 JP63282777A JP28277788A JP2740207B2 JP 2740207 B2 JP2740207 B2 JP 2740207B2 JP 63282777 A JP63282777 A JP 63282777A JP 28277788 A JP28277788 A JP 28277788A JP 2740207 B2 JP2740207 B2 JP 2740207B2
- Authority
- JP
- Japan
- Prior art keywords
- heating element
- fixing
- fixing device
- heat generating
- generating portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Description
本発明はトナーの定着させるのに好適な定着用加熱
体、定着装置および事務用機器に関する。The present invention relates to a heating body for fixing, a fixing device, and office equipment suitable for fixing toner.
今日、複写機等の事務用機器（OA機器）においては、
静電的な手段によって例えば記録紙等の記録材に熱融着
性の樹脂等よりなるトナーを付着させ、この記録材を細
長い形状を有する加熱体上に摺接させてトナーを加熱し
定着させる定着装置が用いられている。そして、例えば
複写機においては種々の大きさの記録材に均一なトナー
の定着が行えるように、この複写機で使われる最大判の
記録材の幅よりも大きい長さの発熱部を有する加熱体が
用いられる。 この定着装置としては従来、管形赤外線電球や棒状ヒ
ータ等を中空のローラの中心部に加熱源として配置した
ヒートローラと、これに並設させた加圧用のローラとを
具備するものがある。そして、これらヒートローラと加
圧用ローラとの間にトナーを付着させた記録材を挟圧し
ながら搬送してトナーを加熱溶融して定着するものが知
られている。 しかしながら、この定着装置では加熱源がローラの中
に挿入されているため、ヒートローラの表面が所望の温
度に発熱するまでに時間がかかる結果、定着前の予熱が
必要であり電力の消費量が大きくなるという欠点があ
る。 また、トナーを定着させるものではないが、例えば感
熱材が被着された記録材を加熱させて、印字等の画像を
生成するサーマルヘッドが多用されている。 このようなサーマルヘッドは細長い基体上にドット形
状の複数の抵抗発熱体が連設され、これがガラス質保護
膜で覆われて形成されているものである。また、これら
抵抗発熱体のそれぞれの両端部に電極が配設され、それ
ぞれの電極に通電のための配線がろう付けなどで取付け
られているものである。 しかしながら、トナー定着用の加熱体は、摺接させる
記録材の全面を一様に加熱する必要があるため抵抗発熱
膜がドット形状に形成されているこの種のサーマルヘッ
ドでは、記録材を一様に加熱することができない。ま
た、このサーマルヘッドは、抵抗発熱体がドット形状に
連接されているから抵抗発熱体が形成されている部分は
形成されていない部分に比較して厚み方向に突出してお
り、記録材を摺接させる面が平坦面でなくなり定着むら
が発生してしまうという不具合がある。 そこで、従来のヒートローラを用いた定着装置の代わ
りに、例えばアルミナセラミックス等からなる電気絶縁
性の細長い基体の表面に、その長手方向に沿った細長い
直線状の抵抗発熱体を厚膜により形成し、この直線状の
抵抗発熱体の端部に導電膜を積層して導電性端子を形成
した平板状の定着用加熱体を用いた定着装置が開発され
た。 ここで、一般にこのような定着用加熱体は高速で定着
を行なうために発熱量が大きいものが求められている。
しかし、この種の定着用加熱体は、一般に商用電源等を
電源として動作するために印加電圧を増大させることが
できないため、大電流が流せるように低いシート抵抗値
を有する材料を用いて形成されている。このためシート
抵抗値の小さな、銀・パラジウム合金を主成分として形
成している。Today, in office equipment (OA equipment) such as copiers,
For example, a toner made of a heat-fusible resin or the like is attached to a recording material such as recording paper by electrostatic means, and the recording material is slid into contact with a heating body having an elongated shape to heat and fix the toner. A fixing device is used. For example, in a copying machine, a heating element having a heating portion having a length larger than the width of the largest recording material used in the copying machine so that the toner can be uniformly fixed on the recording materials of various sizes. Is used. Conventionally, as the fixing device, there is a fixing device including a heat roller in which a tube-shaped infrared light bulb, a rod-shaped heater, or the like is disposed as a heating source in the center of a hollow roller, and a pressure roller arranged in parallel with the heat roller. A recording material having toner adhered between the heat roller and the pressure roller is conveyed while being pressed, and the toner is heated and melted and fixed. However, in this fixing device, since the heating source is inserted into the roller, it takes time for the surface of the heat roller to generate heat to a desired temperature. As a result, preheating before fixing is necessary, and power consumption is reduced. There is a disadvantage that it becomes larger. In addition, a thermal head that does not fix a toner but generates an image such as a print by heating a recording material on which a heat-sensitive material is adhered, for example, is often used. In such a thermal head, a plurality of dot-shaped resistance heating elements are continuously provided on an elongated base body, and are formed by being covered with a glassy protective film. Electrodes are provided at both ends of each of these resistance heating elements, and wiring for energization is attached to each of the electrodes by brazing or the like. However, since the heating element for fixing the toner needs to uniformly heat the entire surface of the recording material to be brought into sliding contact, in a thermal head of this type in which the resistance heating film is formed in a dot shape, the recording material is uniformly heated. Can not be heated. Also, in this thermal head, since the resistance heating element is connected in a dot shape, the portion where the resistance heating element is formed protrudes in the thickness direction as compared with the portion where the resistance heating element is not formed, and the recording material slides. There is a problem that the surface to be formed is not a flat surface and uneven fixing occurs. Therefore, instead of a fixing device using a conventional heat roller, a long and thin linear resistance heating element along the longitudinal direction is formed on a surface of an electrically insulative elongated base made of, for example, alumina ceramic by a thick film. A fixing device using a flat-shaped fixing heating element in which a conductive terminal is formed by laminating a conductive film on the end of the linear resistance heating element has been developed. Here, in general, such a heating element for fixing is required to generate a large amount of heat in order to perform fixing at a high speed.
However, this type of fixing heating element is generally formed using a material having a low sheet resistance value so that a large current can flow because an applied voltage cannot be increased because it operates using a commercial power supply or the like as a power supply. ing. Therefore, a silver-palladium alloy having a small sheet resistance is used as a main component.
上記の平板状の定着用加熱体の発熱量を増やすため
に、大きな電流を通電して反復使用すると、抵抗発熱体
と導電性端子との境界部で断線するものがあることが判
明した。そこで、この断線した加熱体を調査したとこ
ろ、抵抗発熱体と導電性端子とが積層されている部分の
近傍までその温度は高く、これに対して導電性端子の温
度が相対的に低いため、この温度差、換言すれば抵抗発
熱体と導電性端子との境界における温度勾配が急峻なた
めに、抵抗発熱体と導電性端子との熱膨張率の違いに起
因する熱歪により断線が発生し易いことが解明された。 本発明者らの調査の結果、抵抗発熱体から導電性端子
にかけて温度勾配が存在することを発見し、この温度勾
配が大きいために上記の熱歪が大きくなることを発見し
た。 そこで、本発明は、抵抗発熱体と導電性端子との間で
発生しやすい断線を低減できる定着用加熱体、定着装置
および事務用機器を提供することを目的とする。It has been found that when a large current is applied repeatedly to increase the amount of heat generated by the above-mentioned fixing heater in the form of a flat plate, repeated use may occur at the boundary between the resistance heating element and the conductive terminal. Therefore, when investigating the disconnected heating element, the temperature is high up to the vicinity of the portion where the resistance heating element and the conductive terminal are stacked, and the temperature of the conductive terminal is relatively low. Since the temperature difference, in other words, the temperature gradient at the boundary between the resistance heating element and the conductive terminal is steep, disconnection occurs due to thermal strain caused by a difference in the coefficient of thermal expansion between the resistance heating element and the conductive terminal. It was found that it was easy. As a result of the investigation by the present inventors, the inventors have found that a temperature gradient exists from the resistance heating element to the conductive terminal, and that the thermal strain is increased due to the large temperature gradient. Therefore, an object of the present invention is to provide a fixing heating element, a fixing device, and office equipment that can reduce disconnection that easily occurs between a resistance heating element and a conductive terminal.
請求項１記載の定着用加熱体は、電気絶縁性の細長い
基体と；基体の長手方向に沿った細長い発熱部、および
この発熱部の端部に一体的に形成された発熱部より幅の
広い幅広部とを有し、銀・パラジウム合金を主成分とし
て基体上に被着された抵抗発熱体と；幅広部の幅と略同
じ幅を有し幅広部に重合した導電性端子と；幅広部の少
なくとも一部と発熱部を被覆するガラス質保護膜と；を
具備していることを特徴とする。 なお、本発明において、基体はアルミナセラミックス
やムライトセラミクスにより形成するのが適当である
が、これには限定されない。また、基体は細長い形状で
あれば特に大きさや細部の形状は限定されない。 抵抗発熱体や導電性端子は基体の表面に直接に形成さ
れている必要はなく、例えばガラス質のグレーズ層等を
解して形成してもよい。 ガラス質保護膜は形成が容易で比較的熱伝導の良いガ
ラス質のものであれば成分は限定されない。 本発明によれば、抵抗発熱材料で形成されている抵抗
発熱体の端部は幅広部となっているため、この幅広部で
の電流密度は発熱部に対して低減されて、幅広部の発熱
量は発熱部に比較して相対的に抑制される。そして、発
熱部と導電性端子とは幅広部を介して電気接続されてい
るため、発熱部と導電性端子との間の温度勾配が緩やか
になり、熱歪によって誘発されやすい断線の発生が低減
できる。さらには、幅広部の少なくとも一部と発熱部を
覆うようにガラス保護層が被覆されているため、この保
護層を介して熱伝導が生じて発熱部と幅広部または導電
性端子との温度の不均衡が緩和される。その結果、最終
的には発熱部と導電性端子との間の温度勾配は一層緩や
かになる。よって、抵抗発熱体の発熱部と導電性端子と
の境界部における熱歪が小さくなって断線を低減し得
る。 請求項２記載の定着装置は、定着装置本体と；定着装
置本体に収容された請求項１記載の定着用加熱体と；を
具備していることを特徴とする。 この定着装置によれば、請求項１記載の定着用加熱体
の作用により、定着用加熱体の断線に起因する発熱不良
による定着不良を低減し得る。 請求項３記載の事務用機器は、事務用機器本体と；画
像形成装置本体に収容された請求項２記載の定着装置
と；を具備していることを特徴とする。 この事務用機器によれば、請求項２記載の定着装置と
同様の作用を僧する、A heating body for fixing according to claim 1, wherein the heating body has an electrically insulating elongated body; an elongated heating section extending in the longitudinal direction of the base; and a heating section formed wider at an end of the heating section. A resistive heating element having a wide portion and having a silver / palladium alloy as a main component and attached to a substrate; a conductive terminal having a width substantially equal to the width of the wide portion and being superimposed on the wide portion; And a vitreous protective film that covers the heat generating portion. In the present invention, the substrate is suitably formed of alumina ceramics or mullite ceramics, but is not limited thereto. The size and the shape of the details are not particularly limited as long as the base is elongated. The resistance heating element and the conductive terminal need not be formed directly on the surface of the base, but may be formed by breaking a glassy glaze layer, for example. The components of the vitreous protective film are not limited as long as it is easy to form and has a relatively good thermal conductivity. According to the present invention, since the end of the resistance heating element formed of the resistance heating material is a wide portion, the current density in the wide portion is reduced with respect to the heating portion, and the heat generation in the wide portion is reduced. The amount is relatively suppressed as compared to the heating part. And since the heating part and the conductive terminal are electrically connected via the wide part, the temperature gradient between the heating part and the conductive terminal becomes gentle, and the occurrence of disconnection that is easily induced by thermal strain is reduced. it can. Further, since the glass protective layer is coated so as to cover at least a part of the wide portion and the heat generating portion, heat conduction occurs through the protective layer, and the temperature of the heat generating portion and the wide portion or the conductive terminal are reduced. Imbalances are reduced. As a result, the temperature gradient between the heat generating portion and the conductive terminal eventually becomes gentler. Therefore, thermal distortion at the boundary between the heat generating portion of the resistance heating element and the conductive terminal is reduced, and disconnection can be reduced. According to a second aspect of the present invention, there is provided a fixing device comprising: a fixing device main body; and a fixing heating body according to the first aspect housed in the fixing device main body. According to this fixing device, by the action of the fixing heating element according to the first aspect, it is possible to reduce fixing defects due to heat generation failure due to disconnection of the fixing heating element. According to a third aspect of the present invention, there is provided an office equipment comprising: an office equipment main body; and a fixing device according to the second aspect housed in the image forming apparatus main body. According to this office equipment, the same operation as the fixing device according to claim 2 is performed.
以下に本発明の実施の形態を図１なしい図３を参照し
て説明する。 第１図は本発明の定着用加熱体の一実施例を示す一部
を切欠いた正面図、第２図は同じく一部を切欠いた長手
方向縦断面図、第３図は同じく端分を拡大した長手方向
縦断面図である。なお、第２図と第３図は抵抗発熱体等
を厚さ方向に拡大して描いてある。 図において、１は例えばアルミナセラミックス等から
なる電気絶縁性の基体、２は基体１上に設けられた抵抗
発熱体、３はこの抵抗発熱体２を被覆したガラス質保護
膜である。上記基体１は、長さ約300mm、幅約10mm、厚
さ約1.5mmの細長い平板をなす。４は基体１と抵抗発熱
体２との間に形成されたグレーズ層である。 グレーズ層４はPbO・B2O3・SiO2なる化学組成を有す
るガラス質層で基体１の表面に30ないし150μｍの厚さ
を有し、熱伝導率が低い特性を有する。 抵抗発熱体２は、銀・パラジウム合金を主成分とする
抵抗ペーストをグレーズ層４表面にスクリーン印刷法に
より印刷した後に焼成してなるものである。抵抗発熱体
の中央部には細長い発熱部21が形成され、この発熱部21
の両端に幅広部23、23が形成される。なお第３図に発熱
部21と幅広部23との境界を仮想的な境界線Ｂで示した。
幅広部23、23表面には導電性端子24、24が形成されてい
る。この導電性端子24、24は、銀を主成分とする導電性
ペーストをスリーン印刷法により印刷した後に焼成して
形成する。そして、発熱部21から幅広部23、23まで連続
して基体１の幅の全面にわたりガラス質保護膜３が被覆
されている。 上記実施形態の定着用加熱体は、定着装置に組み込ま
れ、さらに例えば複写機等の周知の事務用機器に組み込
まれる。 次に本実施形態の作用を説明する。この定着用加熱体
は、電流密度は発熱部21に対して少なく発熱量が相対的
に抑制された幅広部23、23を介して発熱部21と導電性端
子24、24が電気接続されているため、発熱部21と導電性
端子24、24との間の温度勾配が緩やかになり、熱歪によ
って誘発されやすい断線の発生が低減できる。また、本
実施形態においては幅広部23、23の一部と発熱部21はガ
ラス質保護層３で被覆されているため、この保護層を介
して熱伝導が生じて発熱部21と幅広部23、23の一部との
温度の不均衡が緩和され、この幅広部23、23の一部を介
することによって、発熱部21と導電性端子24、24との間
の温度勾配は一層緩やかになって、発熱部21と導電性端
子24、24との境界部における熱歪がさらに小さくなって
断線を低減し得るものである。 ここで、この作用効果を確認するために、本実施形態
の定着用加熱体について断線試験を行った。試験は、導
電性端子24、24間に140Vの電圧を印加し50Hzのパルス電
流を１時間流して、断線の有無を調べるものである。な
お、この試験における定着用加熱体の消費電力は約400W
となる。また、比較のため、発熱部に直接に導電性端子
を接続し、この発熱部のみをガラス質保護層で覆った従
来の定着用加熱体についても同様の試験を行った。この
試験の結果を次の表に示す。 なお、本実施形態の定着用加熱体は、基体１の表面に
PbO・B2O3・SiO2組成のガラス質グレーズ層４を設けた
ので、発熱部21の熱が熱伝導の良りアルミナセラミクス
の基体１に伝わりにくくなり、したがって熱効率が高く
始動の際の立上がりが速いという利点がある。なお、こ
のグレーズ層４の厚さは30μｍ未満ならば効果がなく、
また150μｍを越えると断線が増加して不適当であるこ
とも判明した。An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a partially cutaway front view showing an embodiment of the fixing heating element of the present invention, FIG. 2 is a longitudinal longitudinal sectional view also partially cut away, and FIG. FIG. 5 is a longitudinal sectional view taken in the longitudinal direction. 2 and 3 illustrate the resistance heating element and the like in an enlarged manner in the thickness direction. In the figure, reference numeral 1 denotes an electrically insulating base made of, for example, alumina ceramics, 2 denotes a resistance heating element provided on the base 1, and 3 denotes a glassy protective film covering the resistance heating element 2. The substrate 1 is an elongated flat plate having a length of about 300 mm, a width of about 10 mm, and a thickness of about 1.5 mm. Reference numeral 4 denotes a glaze layer formed between the base 1 and the resistance heating element 2. The glaze layer 4 is a vitreous layer having a chemical composition of PbO.B 2 O 3 .SiO 2 , has a thickness of 30 to 150 μm on the surface of the substrate 1, and has a characteristic of low thermal conductivity. The resistance heating element 2 is formed by printing a resistance paste containing a silver-palladium alloy as a main component on the surface of the glaze layer 4 by a screen printing method and then firing the same. An elongated heating part 21 is formed at the center of the resistance heating element.
Wide portions 23, 23 are formed at both ends. In FIG. 3, the boundary between the heat generating portion 21 and the wide portion 23 is indicated by a virtual boundary line B.
Conductive terminals 24, 24 are formed on the surfaces of the wide portions 23, 23. The conductive terminals 24, 24 are formed by printing a conductive paste containing silver as a main component by a screen printing method and then firing the paste. Then, the vitreous protective film 3 is covered over the entire width of the base 1 continuously from the heat generating portion 21 to the wide portions 23, 23. The heating element for fixing of the above embodiment is incorporated in a fixing device, and further incorporated in well-known office equipment such as a copying machine. Next, the operation of the present embodiment will be described. In this fixing heater, the heat generating portion 21 and the conductive terminals 24, 24 are electrically connected through the wide portions 23, 23 in which the current density is smaller than that of the heat generating portion 21 and the amount of generated heat is relatively suppressed. Therefore, the temperature gradient between the heat generating portion 21 and the conductive terminals 24, 24 becomes gentle, and the occurrence of disconnection that is easily induced by thermal strain can be reduced. Further, in the present embodiment, since the heat generating portion 21 and a part of the wide portions 23, 23 are covered with the vitreous protective layer 3, heat conduction occurs through the protective layer, and the heat generating portion 21 and the wide portion 23 are formed. , 23 are alleviated, and the temperature gradient between the heat generating portion 21 and the conductive terminals 24, 24 becomes gentler by passing through the wide portions 23, 23. Thus, the thermal strain at the boundary between the heat generating portion 21 and the conductive terminals 24, 24 is further reduced, and the disconnection can be reduced. Here, in order to confirm this effect, a disconnection test was performed on the fixing heating body of the present embodiment. In the test, a voltage of 140 V is applied between the conductive terminals 24, 24, and a pulse current of 50 Hz is applied for one hour to check for disconnection. The power consumption of the fixing heater in this test was about 400W
Becomes For comparison, a similar test was also performed on a conventional fixing heating element in which a conductive terminal was directly connected to a heat generating portion and only this heat generating portion was covered with a vitreous protective layer. The results of this test are shown in the following table. Note that the fixing heating element of the present embodiment is provided on the surface of the base 1.
Since the vitreous glaze layer 4 having the composition of PbO.B 2 O 3 .SiO 2 is provided, the heat of the heat generating portion 21 is hard to be transmitted to the alumina ceramic base 1 with good heat conduction, and therefore, the heat efficiency is high and the start-up time is reduced. There is an advantage that the rise is fast. If the thickness of the glaze layer 4 is less than 30 μm, there is no effect.
It was also found that if the thickness exceeds 150 μm, disconnection increases and it is inappropriate.
請求項１記載の発明によれば、電流密度が発熱部に対
して低減されて発熱部に対して過度に発熱しない幅広部
を介して発熱部と導電性端子が電気接続されているた
め、発熱部と導電性端子との間の温度勾配が緩やかにな
って、熱歪によって誘発されやすい断線の発生が低減で
きる。さらには、幅広部の少なくとも一部と発熱部を覆
うガラス保護層により熱伝導が生じて発熱部と幅広部ま
たは導電性端子との温度の不均衡が緩和される。その結
果、最終的には発熱部と導電性端子との間の温度勾配は
一層緩やかになる。よって、抵抗発熱体の発熱部と導電
性端子との境界部における熱歪が小さくなって断線の発
生しにくい定着用加熱体を提供し得る。 請求項２記載の発明によれば、請求項１記載の定着用
加熱体の作用により、定着用加熱体の断線低減して、定
着不良を低減し得る定着装置を提供できる。 請求項３記載の発明によれば、請求項２記載の定着装
置と同様の効果を有する事務用機器を提供できる。According to the first aspect of the present invention, the current density is reduced with respect to the heat generating portion, and the heat generating portion and the conductive terminal are electrically connected to each other through the wide portion which does not generate excessive heat. The temperature gradient between the portion and the conductive terminal is moderated, and the occurrence of disconnection easily induced by thermal strain can be reduced. Furthermore, heat conduction is caused by the glass protective layer covering at least a part of the wide portion and the heat generating portion, so that the temperature imbalance between the heat generating portion and the wide portion or the conductive terminal is reduced. As a result, the temperature gradient between the heat generating portion and the conductive terminal eventually becomes gentler. Therefore, it is possible to provide a fixing heating element in which thermal distortion at the boundary between the heat generating portion of the resistance heating element and the conductive terminal is reduced and disconnection is less likely to occur. According to the second aspect of the present invention, it is possible to provide a fixing device capable of reducing disconnection of the fixing heating element and reducing defective fixing by the operation of the fixing heating element according to the first aspect. According to the third aspect of the invention, it is possible to provide office equipment having the same effects as the fixing device according to the second aspect.
【図１】 第１図は本発明の加熱体の実施例の平面図である。FIG. 1 is a plan view of an embodiment of a heating element according to the present invention.
【図２】 第２図は同じく断面図である。FIG. 2 is a sectional view of the same.
【図３】 第３図は同じく要部拡大断面図である。FIG. 3 is an enlarged sectional view of a main part of the same.
【符号の説明】 １……基体、２……抵抗発熱体、 21……発熱部、23……幅広部、 24……導電性端子、３……ガラス質保護膜[Description of Signs] 1... Base, 2... Resistive Heating Element, 21... Heating Part, 23.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 佐藤 滋洋 神奈川県横須賀市船越町１―201―１ 株式会社東芝横須賀工場内 (56)参考文献 特開 昭52−142527（ＪＰ，Ａ) 特開 昭62−105647（ＪＰ，Ａ) 特開 昭59−169871（ＪＰ，Ａ) 特開 昭62−92863（ＪＰ，Ａ) 実開 昭56−151151（ＪＰ，Ｕ) 実開 昭61−70394（ＪＰ，Ｕ) 特公 昭63−51359（ＪＰ，Ｂ２) ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Shigehiro Sato 1-1201-1, Funakoshi-cho, Yokosuka-shi, Kanagawa Prefecture Toshiba Yokosuka Factory (56) References JP-A-52-142527 (JP, A) JP-A Sho JP-A-59-169871 (JP, A) JP-A-62-92863 (JP, A) JP-A-56-151151 (JP, U) JP-A-61-70394 (JP, A) U) JP-B 63-51359 (JP, B2)
Claims (3)
部の端部に一体的に形成された発熱部より幅の広い幅広
部とを有し、銀・パラジウム合金を主成分として基体上
に被着された抵抗発熱体と： 幅広部の幅と略同じ幅を有し幅広部に重合した導電性端
子と； 幅広部の少なくとも一部と発熱部を被覆するガラス質保
護膜と； を具備していることを特徴とする定着用加熱体。1. An electrically insulating elongated base; an elongated heat generating portion along a longitudinal direction of the base; and a wide portion wider than the heat generating portion integrally formed at an end of the heat generating portion. A resistive heating element, which is mainly composed of a silver-palladium alloy and is adhered to a substrate; and a conductive terminal having a width substantially equal to the width of the wide portion and superposed on the wide portion; And a vitreous protective film for covering the portion.
と； を具備していることを特徴とする定着装置。2. A fixing device comprising: a fixing device main body; and the fixing heating body according to claim 1 housed in the fixing device main body.
と； を具備していることを特徴とする事務用機器。3. An office equipment comprising: an office equipment main body; and the fixing device according to claim 2 housed in the image forming apparatus main body.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63282777A JP2740207B2 (en) | 1988-11-09 | 1988-11-09 | Fixing heating element, fixing device and office equipment |
| DE68921124T DE68921124T2 (en) | 1988-08-25 | 1989-08-22 | Heating strips. |
| EP89308485A EP0360418B1 (en) | 1988-08-25 | 1989-08-22 | Strip heater |
| US07/396,700 US5068517A (en) | 1988-08-25 | 1989-08-22 | Printed strip heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63282777A JP2740207B2 (en) | 1988-11-09 | 1988-11-09 | Fixing heating element, fixing device and office equipment |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3067992A Division JPH04215285A (en) | 1991-03-07 | 1991-03-07 | Heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02129883A JPH02129883A (en) | 1990-05-17 |
| JP2740207B2 true JP2740207B2 (en) | 1998-04-15 |
Family
ID=17656943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63282777A Expired - Lifetime JP2740207B2 (en) | 1988-08-25 | 1988-11-09 | Fixing heating element, fixing device and office equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2740207B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4911910B2 (en) * | 2005-03-31 | 2012-04-04 | 日本碍子株式会社 | NOx measuring electrode part structure, method for forming the same, and NOx sensor element |
| JP4741924B2 (en) * | 2005-10-07 | 2011-08-10 | パナソニック株式会社 | Infrared bulb and heating device |
| JP5381255B2 (en) * | 2009-04-08 | 2014-01-08 | 東芝ライテック株式会社 | Ceramic heater, heating device, image forming device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL105701B1 (en) * | 1977-03-11 | 1979-10-31 | Instytut Przemyslu Organicznego Te Warschau En Politechnika Wroclawska Te Wroclaw Polen | PARASITIC AGENT |
| JPS56151151U (en) * | 1980-04-12 | 1981-11-12 | ||
| JPS59169871A (en) * | 1983-03-17 | 1984-09-25 | Fujitsu Ltd | Thermal head |
| JPS6292863A (en) * | 1985-10-18 | 1987-04-28 | Alps Electric Co Ltd | Thermal head |
| JPS62105647A (en) * | 1985-11-01 | 1987-05-16 | Oki Electric Ind Co Ltd | Thermal head and manufacture thereof |
| JPH0733354B2 (en) * | 1986-08-20 | 1995-04-12 | 大日本インキ化学工業株式会社 | Optically active biphenyl ester derivative |
-
1988
- 1988-11-09 JP JP63282777A patent/JP2740207B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02129883A (en) | 1990-05-17 |
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