JPH10221984A - Ceramic heater for fixing device and heat fixing device - Google Patents
Ceramic heater for fixing device and heat fixing deviceInfo
- Publication number
- JPH10221984A JPH10221984A JP2028197A JP2028197A JPH10221984A JP H10221984 A JPH10221984 A JP H10221984A JP 2028197 A JP2028197 A JP 2028197A JP 2028197 A JP2028197 A JP 2028197A JP H10221984 A JPH10221984 A JP H10221984A
- Authority
- JP
- Japan
- Prior art keywords
- fixing device
- ceramic heater
- heating element
- ceramic
- heat
- 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
- 239000000919 ceramic Substances 0.000 title claims abstract description 73
- 238000010438 heat treatment Methods 0.000 claims abstract description 55
- 239000000758 substrate Substances 0.000 claims abstract description 38
- 239000004020 conductor Substances 0.000 claims abstract description 8
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 claims description 5
- 239000000463 material Substances 0.000 description 12
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 6
- 238000009792 diffusion process Methods 0.000 description 6
- 239000011521 glass Substances 0.000 description 4
- 239000011241 protective layer Substances 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000007650 screen-printing Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Landscapes
- Fixing For Electrophotography (AREA)
- Resistance Heating (AREA)
Abstract
(57)【要約】
【課題】 発熱体を大型化することなく、全体の温度分
布が均一な定着器用セラミックスヒーター、並びにこの
セラミックスヒーターを用いた定着性にむらのない加熱
定着装置を提供する。
【解決手段】 セラミックスヒータは、電気絶縁性のセ
ラミックス基板２の一表面に発熱体３を有し、その反対
側の表面にセラミックス基板２内又はその側面に設けた
導体４ａにより発熱体３と電気的に接続された電極４を
備えいえいる。このセラミックスヒーターを用いたプリ
ンター等の加熱定着装置は、中央部と端部とでトナーの
定着性にむらがなく、消費電力も少ない。
(57) [Problem] To provide a ceramic heater for a fixing device having a uniform overall temperature distribution without increasing the size of a heating element, and a heating / fixing device using the ceramic heater, which has a uniform fixing property. SOLUTION: The ceramic heater has a heating element 3 on one surface of an electrically insulating ceramic substrate 2, and electrically connects the heating element 3 with a conductor 4a provided in or on the side surface of the ceramic substrate 2 on the opposite surface. It has electrodes 4 which are electrically connected. In a heat fixing device such as a printer using the ceramic heater, the fixability of the toner is not uneven between the center and the end, and the power consumption is small.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、複写機やプリンタ
ー等に用いられる定着器用のセラミックスヒーター、及
びこのヒーターを用いた加熱定着装置に関する。[0001] 1. Field of the Invention [0002] The present invention relates to a ceramic heater for a fixing device used in a copying machine, a printer, and the like, and a heating and fixing device using the heater.
【０００２】[0002]
【従来の技術】ファクシミリや複写機、プリンター等に
おけるトナー画像の定着装置では、加熱ローラと該加熱
ローラに接する加圧ローラとによって、感光ドラムから
未定着のトナー画像が転写された記録紙等の転写材を挟
持搬送しつつ加熱することにより、未定着のトナー画像
を転写材上に定着する加熱ローラ方式が一般に多用され
ている。2. Description of the Related Art In a fixing device of a toner image in a facsimile, a copying machine, a printer, or the like, a heating roller and a pressure roller in contact with the heating roller are used to transfer a non-fixed toner image from a photosensitive drum to a recording paper or the like. A heating roller method of fixing an unfixed toner image on a transfer material by heating the transfer material while nipping and transporting the transfer material is generally widely used.
【０００３】この加熱ローラ方式における従来の加熱ロ
ーラは、円筒状の金属ロール中にハロゲンランプなどの
熱源を設置し、その熱で金属ロールを加熱することによ
り、トナー画像を定着させるものであった。A conventional heating roller in this heating roller system is such that a heat source such as a halogen lamp is installed in a cylindrical metal roll and the metal roll is heated by the heat to fix a toner image. .
【０００４】近年、加熱ローラの加熱部にセラミックス
ヒーターを用いたもの、即ち電気絶縁性のアルミナ基板
上に線状の発熱体を設け、この発熱体にパルス通電して
加熱するものが実用化されている。この方式の加熱定着
装置は、特開平１−２６３６７９号公報、特開平２−１
５７８７８号公報、特開昭６３−３１３１８２号公報等
に記載されている。In recent years, a heater using a ceramic heater in the heating portion of a heating roller, that is, a heater in which a linear heating element is provided on an electrically insulating alumina substrate, and the heating element is heated by applying a pulse current has been put to practical use. ing. This type of heat fixing device is disclosed in JP-A-1-263679 and JP-A-2-2-1.
No. 57878 and JP-A-63-313182.
【０００５】具体的には、例えば図１に示すように、セ
ラミックス基板上に発熱体を設けたセラミックスヒータ
ー１を樹脂製の支持体６に取り付けて加熱ローラとし、
このセラミックスヒーター１に接して加圧ローラ７を配
置し、更にセラミックスヒーター１と加圧ローラ７との
間に加圧ローラ７とほぼ同一の速度で耐熱性フィルム８
を移動させることにより転写材９を搬送し、加圧ローラ
７による加圧と耐熱性フィルム８を介したセラミックス
ヒーター１による加熱とによって、トナー画像１０を転
写材９に定着させている。Specifically, as shown in FIG. 1, for example, a ceramic heater 1 having a heating element provided on a ceramic substrate is attached to a resin support 6 to form a heating roller.
A pressure roller 7 is disposed in contact with the ceramic heater 1, and a heat-resistant film 8 is provided between the ceramic heater 1 and the pressure roller 7 at substantially the same speed as the pressure roller 7.
The toner image 10 is fixed on the transfer material 9 by conveying the transfer material 9 by moving the transfer roller 9 and applying pressure by the pressure roller 7 and heating by the ceramic heater 1 via the heat-resistant film 8.
【０００６】このようなセラミックスヒーターを用いた
加熱ローラ方式の加熱定着装置においては、セラミック
スヒーターの熱容量が金属製のロールを用いた従前の方
式に比較して非常に小さいため、消費電力を低減できる
などの利点がある。In such a heating roller type fixing device using a ceramic heater, since the heat capacity of the ceramic heater is very small as compared with the conventional type using a metal roll, power consumption can be reduced. There are advantages such as.
【０００７】[0007]
【発明が解決しようとする課題】このように、加熱ロー
ラ方式の加熱定着装置では、支持体にセラミックスヒー
ターを取り付けた加熱ローラと、表面がゴム等の弾性体
からなる加圧ローラとの間に耐熱性フィルムを走らせ、
両ローラ間に未定着のトナー画像を形成した転写材を定
速で送り込むことによって、トナー画像が加熱加圧され
て転写材上に定着される。As described above, in the heat roller type heat fixing device, the heating roller having the ceramic heater attached to the support and the pressure roller having a surface made of an elastic material such as rubber are disposed between the heating roller and the pressure roller. Run a heat-resistant film,
By feeding the transfer material on which an unfixed toner image is formed between the two rollers at a constant speed, the toner image is heated and pressurized and fixed on the transfer material.
【０００８】しかしながら、従来のセラミックスヒータ
ーは、図２に示すように、電気絶縁性のセラミックス基
板２の一表面の中心部に発熱体３を形成し、発熱体３の
両端部又は片方の端部に給電用の電極４を形成している
ため、加圧ローラと対向する定着部の両側又は片側に電
極４を形成した部分が突き出た形状になっている。尚、
セラミックスヒーター１の表面には、発熱体３を覆うよ
うにガラス等の保護層５が設けてある。However, in the conventional ceramic heater, as shown in FIG. 2, a heating element 3 is formed at the center of one surface of an electrically insulating ceramic substrate 2, and both ends or one end of the heating element 3 are formed. Since the power supply electrode 4 is formed in the fixing portion, the portion where the electrode 4 is formed protrudes on both sides or one side of the fixing portion facing the pressure roller. still,
A protective layer 5 made of glass or the like is provided on the surface of the ceramic heater 1 so as to cover the heating element 3.
【０００９】このため、セラミックスヒーター１の動作
時においては、発熱体３で発生した熱がセラミックス基
板２の電極４を設けた端部にまで伝わるため、発熱体３
の端部では常に中心部より温度が低くなり、転写材の両
側端部におけるトナーの定着性が低下するという問題が
あった。For this reason, when the ceramic heater 1 is operated, the heat generated by the heating element 3 is transmitted to the end of the ceramic substrate 2 where the electrode 4 is provided.
There is a problem that the temperature is always lower at the end portion than at the center portion, and the fixability of the toner at both end portions of the transfer material is reduced.
【００１０】この問題を解決するため、従来は発熱体の
長さを転写材の幅より大幅に長くすることによって、定
着部内で温度が均一になるようにしている。しかし、発
熱体を長くする分だけセラミックスヒーターが大型化す
るうえ、消費電力が大きくなるなどの欠点があった。In order to solve this problem, conventionally, the length of the heating element is made much longer than the width of the transfer material so that the temperature is made uniform in the fixing section. However, there are drawbacks such as the ceramic heater becoming larger and the power consumption being increased by the length of the heating element.
【００１１】本発明は、このような従来の事情に鑑み、
発熱体を大型化することなく、全体の温度分布を均一に
なし得るセラミックスヒーター、並びにこのセラミック
スヒーターを用いることにより、トナー定着性に優れ、
消費電力の低減が可能な加熱定着装置を提供することを
目的とする。The present invention has been made in view of such a conventional situation,
Without increasing the size of the heating element, a ceramic heater that can make the entire temperature distribution uniform, and by using this ceramic heater, excellent toner fixability,
An object of the present invention is to provide a heat fixing device capable of reducing power consumption.
【００１２】[0012]
【課題を解決するための手段】上記の目的を達成するた
め、本発明が提供する定着器用セラミックスヒーター
は、電気絶縁性のセラミックス基板の一表面に発熱体を
有し、その反対側の表面にセラミックス基板内又はその
側面に設けた導体により発熱体と電気的に接続された電
極を備えることを特徴とするものである。Means for Solving the Problems To achieve the above object, a ceramic heater for a fixing device provided by the present invention has a heating element on one surface of an electrically insulating ceramic substrate, and has a heating element on the opposite surface. An electrode electrically connected to the heating element by a conductor provided in or on a side surface of the ceramic substrate is provided.
【００１３】また、本発明の加熱定着装置は、支持体に
取り付けられて加熱ローラを構成するセラミックスヒー
ターとして、上記本発明の定着器用セラミックスヒータ
ーを用いることを特徴とするものである。Further, the heat-fixing apparatus of the present invention is characterized in that the above-described ceramic heater for a fixing device of the present invention is used as a ceramic heater attached to a support and constituting a heating roller.
【００１４】[0014]
【発明の実施の形態】本発明では、発熱体をセラミック
ス基板上の一表面に形成し、このセラミックス基板の一
表面と反対側の表面に電極を形成し、発熱体と電極とを
セラミックス基板内又はその側面に設けた導体で電気的
に接続することにより、電極から発熱体に給電するよう
にしてある。DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a heating element is formed on one surface of a ceramic substrate, and an electrode is formed on a surface opposite to the one surface of the ceramic substrate. Alternatively, power is supplied from the electrodes to the heating element by being electrically connected by a conductor provided on the side surface thereof.
【００１５】このように給電用の電極を発熱体と反対側
の表面に設けたことにより、セラミックス基板と発熱体
の長さの差を従来に比べて極めて小さくすることがで
き、従って発熱体で発生した熱がセラミックス基板の長
手方向に拡がるスペースが減少し、相対的に定着部以外
への熱の拡散を抑えることができる。その結果、セラミ
ックスヒーター内における温度分布が均一になり、ヒー
ター中央部の温度とヒーター端部の温度差が小さくな
る。このため、従来は定着部の中でも温度が低下しやす
いヒーター端部での定着性がヒーター中央部よりも劣っ
ていたが、その差を大幅に低減することができる。By providing the power supply electrode on the surface opposite to the heating element in this manner, the difference in length between the ceramic substrate and the heating element can be made extremely small as compared with the prior art. The space in which the generated heat spreads in the longitudinal direction of the ceramic substrate is reduced, and the diffusion of heat to portions other than the fixing portion can be relatively suppressed. As a result, the temperature distribution in the ceramic heater becomes uniform, and the difference between the temperature at the center of the heater and the temperature at the end of the heater is reduced. For this reason, in the related art, the fixing property at the heater end, where the temperature tends to decrease, is lower than that at the center of the heater, but the difference can be greatly reduced.
【００１６】また、従来のセラミックスヒーターでは、
セラミックス基板の端部（電極側）への熱の拡散を抑制
するため、熱伝導率が２０Ｗ／ｍＫ程度のアルミナから
なる基板が用いられていたが、本発明ではセラミックス
基板端部への熱の拡散が殆どなくなるので、高熱伝導性
の窒化アルミニウムからなる基板も使用することができ
る。即ち、本発明ではセラミックス基板と発熱体がほぼ
同一長さであるからセラミックス基板端部への熱の拡散
がなくなり、熱伝導率が８０Ｗ／ｍＫ以上である窒化ア
ルミニウム基板でも支障なく使用することができる。In the conventional ceramic heater,
A substrate made of alumina having a thermal conductivity of about 20 W / mK has been used to suppress the diffusion of heat to the end portion (electrode side) of the ceramic substrate. A substrate made of aluminum nitride having high thermal conductivity can be used because diffusion is almost eliminated. That is, in the present invention, since the ceramic substrate and the heating element have substantially the same length, diffusion of heat to the end of the ceramic substrate is eliminated, and the aluminum nitride substrate having a thermal conductivity of 80 W / mK or more can be used without any problem. it can.
【００１７】このように、本発明のセラミックスヒータ
ーでは、その端部への熱の拡散が殆どないので、ヒータ
ー全体の温度が極めて均一化され、従って本発明のセラ
ミックスヒーターを備えた加熱定着装置においては転写
材の両端の部分でも中央部分とほぼ同等のトナー定着性
を得ることができる。As described above, in the ceramic heater according to the present invention, since the heat is hardly diffused to the end portion, the temperature of the entire heater is extremely uniform, and therefore, in the heating and fixing apparatus provided with the ceramic heater according to the present invention. Can obtain toner fixability almost equal to that of the central portion even at both ends of the transfer material.
【００１８】しかも、本発明では定着性に関与しない余
分な熱の拡散が減少し、更にはセラミックスヒーター自
体の熱容量が低減する。このため、定着する際に加熱定
着装置を余熱するために必要な電力も低減することがで
き、加えて定着時においても熱の拡散が小さくなること
から消費電力を低減することができる。この消費電力の
低減効果は、特に熱伝導率の高い窒化アルミニウム基板
を使用した場合に顕著である。Moreover, in the present invention, the diffusion of excess heat not involved in the fixing property is reduced, and the heat capacity of the ceramic heater itself is reduced. Therefore, it is possible to reduce the electric power required for preheating the heat fixing device when fixing, and also to reduce the power consumption because the heat diffusion is reduced during fixing. This effect of reducing power consumption is remarkable especially when an aluminum nitride substrate having high thermal conductivity is used.
【００１９】尚、セラミックス基板と発熱体の長手方向
の長さは同じにすることが望ましいが、電気的な規制も
あり難しい場合には、その範囲内で長さの差をできるだ
け少なくすることが好ましい。また、発熱体と電極との
電気的な接続は、セラミックス基板の側面に沿って導体
で接続することもできるが、セラミックス基板内部を貫
通するスルホールに充填した導体により接続する方法
が、接続導体が外部に露出せず、電気的な信頼性が高い
ため更に好ましい。It is desirable that the lengths of the ceramic substrate and the heating element in the longitudinal direction be the same. However, if it is difficult due to electric restrictions, it is necessary to minimize the difference in length within the range. preferable. In addition, the electrical connection between the heating element and the electrode can be made by a conductor along the side surface of the ceramic substrate. It is more preferable because it is not exposed to the outside and has high electrical reliability.
【００２０】[0020]
【実施例】電気絶縁性のセラミックス基板として、それ
ぞれ長さ２４０ｍｍ×幅１０ｍｍ×厚さ０.６３５ｍｍ
のＡｌ2Ｏ3基板とＡｌＮ基板を用意した。それぞれのセ
ラミックス基板上の両端部の所定の位置に直径０.３ｍ
ｍのスルホールをレーザーにより穿孔した。このスルー
ホールに導体としてＡｇペーストを充填した後、各セラ
ミックス基板の一表面にＡｇ−Ｐｄペーストをスクリー
ン印刷法によりスルーホールと接続するように塗布し、
焼成して長さ２３５ｍｍ×幅１.５ｍｍの発熱体を形成
した。DESCRIPTION OF THE PREFERRED EMBODIMENTS As electrically insulating ceramic substrates, each is 240 mm long × 10 mm wide × 0.635 mm thick.
Al 2 O 3 substrate and AlN substrate were prepared. 0.3 m diameter at both ends of each ceramic substrate
m was pierced by a laser. After filling the through holes with an Ag paste as a conductor, an Ag-Pd paste is applied to one surface of each ceramic substrate so as to be connected to the through holes by a screen printing method.
By baking, a heating element having a length of 235 mm and a width of 1.5 mm was formed.
【００２１】次に、上記発熱体を形成した各セラミック
ス基板の一表面と反対側の表面に、Ａｇペーストを用い
てスクリーン印刷により電極を形成し、大気中において
８８０℃で１０分間焼成した。その後、セラミックス基
板の発熱体を形成した一表面にガラスペーストをスクリ
ーン印刷により塗布し、大気中において６００℃で１０
分間焼成して保護層を形成した。Next, electrodes were formed by screen printing using an Ag paste on the surface opposite to the one surface of each of the ceramic substrates on which the heating elements were formed, and baked at 880 ° C. for 10 minutes in the air. Thereafter, a glass paste is applied by screen printing to one surface of the ceramic substrate on which the heating element is formed, and the glass paste is applied at 600 ° C. in air at 10 ° C.
After baking for minutes, a protective layer was formed.
【００２２】かくして得られた各セラミックスヒーター
は、図３及び図４に示すように、Ａｌ2Ｏ3又はＡｌＮか
らなる各セラミックス基板２の一表面にＡｇ−Ｐｄの発
熱体３を有し、その反対表面の両端部にはＡｇの電極４
を備え、発熱体３の両端部にはセラミックス基板２内を
貫通して発熱体３と電極４を電気的に接続するＡｇの導
体４ａが設けてあり、発熱体３を形成したセラミックス
基板２の一表面をガラスの保護層５で被覆した構造を有
していた。Each of the ceramic heaters thus obtained has an Ag-Pd heating element 3 on one surface of each ceramic substrate 2 made of Al 2 O 3 or AlN, as shown in FIGS. Ag electrodes 4 on both ends of the opposite surface
Ag conductors 4a that penetrate through the inside of the ceramic substrate 2 and electrically connect the heating element 3 and the electrodes 4 are provided at both ends of the heating element 3. The ceramic substrate 2 on which the heating element 3 is formed is provided. It had a structure in which one surface was covered with a glass protective layer 5.
【００２３】その後、図１に示すように、上記各実施例
のＡｌ2Ｏ3とＡｌＮの各セラミックスヒーターを通常の
ごとく樹脂製の支持体６に固定して加熱ローラとし、更
に加圧ローラ７及び耐熱性フィルム８と組み合わせて、
プリンタの加熱定着装置を構成した。これらの加熱定着
装置を用いて、実際に転写材である用紙にトナーを加熱
定着させたときの定着性を評価すると共に、その時の消
費電力を積算電力計にて測定し、得られた結果を下記表
１に示した。Thereafter, as shown in FIG. 1, the ceramic heaters of Al 2 O 3 and AlN of each of the above embodiments are fixed to a resin support 6 in the usual manner to form a heating roller, and a pressure roller 7. And in combination with the heat-resistant film 8,
The heat fixing device of the printer was constructed. Using these heat fixing devices, the fixing performance when the toner is actually heated and fixed on the paper as the transfer material is evaluated, and the power consumption at that time is measured by an integrating wattmeter, and the obtained result is measured. The results are shown in Table 1 below.
【００２４】また、比較例として、上記と同じＡｌ2Ｏ3
とＡｌＮからなる各セラミックス基板、Ａｇ−Ｐｄの発
熱体、及びＡｇの電極を用いたが、図２に示すように、
電極４を発熱体３が設けられたセラミックス基板２の同
一表面上の両端部に形成した構造を有する従来のＡｌ2
Ｏ3及びＡｌＮの各セラミックスヒーターを用意した。
これらのセラミックスヒーターを用いた加熱定着装置に
ついても、上記と同様に定着性を評価すると共にその時
の消費電力を積算電力計にて測定し、その結果を表１に
併せて示した。As a comparative example, the same Al 2 O 3
A ceramic substrate made of AlN and AlN, a heating element of Ag-Pd, and an electrode of Ag were used, as shown in FIG.
A conventional Al 2 having a structure in which electrodes 4 are formed at both ends on the same surface of a ceramic substrate 2 provided with a heating element 3
O 3 and AlN ceramic heaters were prepared.
With respect to the heat fixing device using these ceramic heaters, the fixing property was evaluated in the same manner as described above, and the power consumption at that time was measured by an integrating wattmeter. The results are shown in Table 1.
【００２５】尚、上記の定着性及び消費電力の評価試験
は、Ａ４の用紙を用いて４枚／分の定着速度で実施し
た。また、トナーの定着性は、用紙上に定着されたトナ
ー画像を紙でこすったとき、トナーの剥がれ及び脱落が
全くなく、良好な定着状態のものを「◎」、若干のトナ
ーが脱落するものを「○」、トナーが半分程度脱落又は
剥がれるものを「△」で表示した。消費電力について
は、「余熱時」とは用紙が加熱定着器に挿入されるまで
に消費される電力、「定着時」とは用紙が加熱定着器で
定着されているときに消費されている電力をいう。The above-described evaluation tests of the fixing property and the power consumption were carried out using A4 paper at a fixing speed of 4 sheets / min. In addition, the toner fixability was evaluated as follows: when the toner image fixed on the paper was rubbed with paper, no peeling or falling off of the toner was observed. Is indicated by “○”, and the toner from which about half of the toner is removed or peeled is indicated by “△”. Regarding the power consumption, "when remaining heat" means the power consumed until the paper is inserted into the heat fixing device, and "when fixing" means the power consumed when the paper is fixed by the heat fixing device. Say.
【００２６】[0026]
【表１】 セラミックス トナー定着性 消 費 電 力（Ｗｈ） ヒーター試料 紙中央 紙端部 余熱時 定着時 合 計 Ａｌ2Ｏ3 ○ ○ 1.08 0.40 1.48 ＡｌＮ ◎ ○ 0.88 0.39 1.27 Ａｌ2Ｏ3＊ ○ △ 1.23 0.53 1.73 ＡｌＮ ＊ ◎ △ 1.05 0.51 1.56 （注）表中の＊を付した試料は比較例である。[Table 1] Ceramic toner fixing power consumption Power (Wh) Heater Sample paper Total edge when fixing at the end of paper edge Al 2 O 3 ○ ○ 1.08 0.40 1.48 AlN ◎ ○ 0.88 0.39 1.27 Al 2 O 3 * ○ △ 1.23 0.53 1.73 AlN * ◎ △ 1.05 0.51 1.56 (Note) Samples marked with * in the table are comparative examples.
【００２７】[0027]
【発明の効果】本発明によれば、発熱体を大型化するこ
となく、アルミナ及び窒化アルミニウムのいずれのセラ
ミックス基板を用いても、全体の温度分布が均一なセラ
ミックスヒーターを提供することができる。従って、こ
のセラミックスヒーターを用いた加熱定着装置は、トナ
ー定着性を改善できると共に、消費電力も低減すること
が可能である。According to the present invention, it is possible to provide a ceramic heater having a uniform temperature distribution as a whole, regardless of whether the substrate is made of alumina or aluminum nitride without increasing the size of the heating element. Therefore, the heat fixing device using the ceramic heater can improve the toner fixing property and reduce the power consumption.
【図１】セラミックスヒーターを用いた加熱定着装置の
一具体例を示す概略の断面図である。FIG. 1 is a schematic sectional view showing a specific example of a heat fixing device using a ceramic heater.
【図２】従来のセラミックスヒーターを示す概略の平面
図である。FIG. 2 is a schematic plan view showing a conventional ceramic heater.
【図３】本発明のセラミックスヒーターの一具体例を示
す概略の平面図である。FIG. 3 is a schematic plan view showing a specific example of the ceramic heater of the present invention.
【図４】本発明の図３のセラミックスヒーターの概略の
断面図である。4 is a schematic sectional view of the ceramic heater of FIG. 3 of the present invention.
１ セラミックスヒーター ２ セラミックス基板 ３ 発熱体 ４ 電極 ４ａ 導体 ５ 保護層 ６ 支持体 ８ 耐熱性フィルム ９ 転写材 １０ トナー REFERENCE SIGNS LIST 1 ceramic heater 2 ceramic substrate 3 heating element 4 electrode 4 a conductor 5 protective layer 6 support 8 heat-resistant film 9 transfer material 10 toner
Claims (3)
に発熱体を有し、その反対側の表面にセラミックス基板
内又はその側面に設けた導体により前記発熱体と電気的
に接続された電極を備えることを特徴とする定着器用セ
ラミックスヒーター。A heating element is provided on one surface of an electrically insulating ceramic substrate, and an electrode electrically connected to the heating element by a conductor provided in or on the side of the ceramic substrate is provided on the opposite surface. A ceramic heater for a fixing device, comprising:
アルミニウムを主成分とすることを特徴とする、特許請
求第１項記載の定着器用セラミックスヒーター。2. The ceramic heater for a fixing device according to claim 1, wherein the electrically insulating ceramic substrate contains aluminum nitride as a main component.
ラミックスヒーターを用いることを特徴とする加熱定着
装置。3. A heating and fixing device using the ceramic heater for a fixing device according to claim 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2028197A JPH10221984A (en) | 1997-02-03 | 1997-02-03 | Ceramic heater for fixing device and heat fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2028197A JPH10221984A (en) | 1997-02-03 | 1997-02-03 | Ceramic heater for fixing device and heat fixing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10221984A true JPH10221984A (en) | 1998-08-21 |
Family
ID=12022796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2028197A Pending JPH10221984A (en) | 1997-02-03 | 1997-02-03 | Ceramic heater for fixing device and heat fixing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10221984A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001358079A (en) * | 2000-06-15 | 2001-12-26 | Sumitomo Electric Ind Ltd | Ceramic heater unit for semiconductor manufacturing equipment and semiconductor manufacturing equipment |
| JP2004039647A (en) * | 2003-08-20 | 2004-02-05 | K-Tech Devices Corp | Resistive heating element and its manufacturing method |
-
1997
- 1997-02-03 JP JP2028197A patent/JPH10221984A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001358079A (en) * | 2000-06-15 | 2001-12-26 | Sumitomo Electric Ind Ltd | Ceramic heater unit for semiconductor manufacturing equipment and semiconductor manufacturing equipment |
| JP2004039647A (en) * | 2003-08-20 | 2004-02-05 | K-Tech Devices Corp | Resistive heating element and its manufacturing method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH11260533A (en) | Heating body assembly, heating device, and image forming apparatus | |
| JPH10221984A (en) | Ceramic heater for fixing device and heat fixing device | |
| JP2002236426A (en) | Fixing device and image forming device | |
| JP2000223244A (en) | Heating element and fixing device | |
| JP2600835B2 (en) | Fixing heating element, fixing device, and image forming apparatus | |
| KR100388862B1 (en) | Ceramic Settling Heater Containing Silicon Nitride | |
| JP2740207B2 (en) | Fixing heating element, fixing device and office equipment | |
| JP2001223068A (en) | Heating body, method of manufacturing heating body, image heating apparatus, and image forming apparatus | |
| JPH09269687A (en) | Fixing heater, fixing device, and image forming device | |
| JP2003109727A (en) | Plate-shaped heater, fixing device, and image forming apparatus | |
| JP2004047247A (en) | Electrode structure, heating element, heating device, and image forming device | |
| JP2002108120A (en) | Fixing heater, fixing device, and image forming device | |
| JPH11174875A (en) | Heating and fixing device | |
| JP2000012196A (en) | Heating element, fixing device, and image forming device | |
| JPH11282290A (en) | Fixing heater, fixing device, and image forming device | |
| JPH10247025A (en) | Ceramic heater and heat fixing device | |
| JPH10301424A (en) | Heater and fixing device for fixing toner image | |
| JP2004047177A (en) | Heating device and image forming device | |
| JP3917288B2 (en) | Plate heater, fixing device, and image forming apparatus | |
| JP3857344B2 (en) | Heater | |
| JPH08227239A (en) | Thermal fixing device | |
| JP2000284619A (en) | Fixing heater and image forming apparatus | |
| JPH09269686A (en) | Heater, fixing device and image forming apparatus | |
| JPH11212384A (en) | Heat fixing device | |
| JP2001209264A (en) | Fixing heater, fixing device, and image forming device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A977 | Report on retrieval |
Effective date: 20050412 Free format text: JAPANESE INTERMEDIATE CODE: A971007 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20050426 |
|
| A521 | Written amendment |
Effective date: 20050623 Free format text: JAPANESE INTERMEDIATE CODE: A523 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20060912 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20061109 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20061219 |