JPH0580666A - Belt fixing device - Google Patents
Belt fixing deviceInfo
- Publication number
- JPH0580666A JPH0580666A JP3243617A JP24361791A JPH0580666A JP H0580666 A JPH0580666 A JP H0580666A JP 3243617 A JP3243617 A JP 3243617A JP 24361791 A JP24361791 A JP 24361791A JP H0580666 A JPH0580666 A JP H0580666A
- Authority
- JP
- Japan
- Prior art keywords
- belt
- roller
- pressure roller
- fixing device
- hardness
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電子写真複写機、ファ
クシミリあるいはプリンター等の画像形成装置におい
て、トナー像をベルトを用いて定着するベルト定着装置
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt fixing device for fixing a toner image on a belt in an image forming apparatus such as an electrophotographic copying machine, a facsimile or a printer.
【０００２】[0002]
【従来の技術】画像形成装置に用いられるベルト定着装
置においては、定着ベルト内面に発熱部材を配置し、こ
の発熱部材を介してローラを押し当てニップ部を形成
し、そのニップ部でトナー像などの未定着画像が転写さ
れた転写紙を挾持搬送し定着を行なっている。2. Description of the Related Art In a belt fixing device used in an image forming apparatus, a heat generating member is arranged on the inner surface of a fixing belt, a roller is pressed against the heat generating member to form a nip portion, and a toner image or the like is formed at the nip portion. The transfer paper on which the unfixed image is transferred is nipped and conveyed to be fixed.
【０００３】とろこで、上記定着ベルトは耐久性等を考
慮して、ポリアミド等の耐熱フィルム表層に四弗化エチ
レン樹脂（テフロン「商品名」）がコーティングされて
いる。そのため、上記ベルト定着装置を用いて転写紙上
のトナー像を定着すると、従来から知られているテフロ
ン加工がなされた押圧ローラを用いて画像定着するとき
に現れる梨地画像と同様の梨地画像が発生してしまう。
この梨地画像は、未定着画像(トナー像）側を剛体でつ
ぶしてもトナー層の表面の凹凸を慣らすことができず、
部分部分に凹部が残りその凹部で光が乱反射することで
発生するものである。そこで、上記ベルトにテフロンに
変わってシリコーンゴム等の弾性材をコーティングする
ことで、上記梨地画像の発生を防止することができる。In consideration of durability and the like, the fixing belt has a surface layer of a heat-resistant film such as polyamide coated with tetrafluoroethylene resin (Teflon "trade name"). Therefore, when the toner image on the transfer paper is fixed by using the belt fixing device, a satin image similar to a satin image that appears when the image is fixed by using the conventionally known Teflon-processed pressure roller is generated. Will end up.
In this satin image, even if the unfixed image (toner image) side is crushed with a rigid body, the unevenness of the surface of the toner layer cannot be used,
This is caused by the fact that a concave portion remains in the partial portion and light is diffusely reflected in the concave portion. Therefore, by coating the belt with an elastic material such as silicone rubber instead of Teflon, it is possible to prevent the occurrence of the satin image.
【０００４】[0004]
【発明が解決しようとする課題】上述した定着ベルトに
コーティングするシリコーンゴムは、肉厚（１ｍｍ程
度）にコーティングすることで、上記梨地画像の発生防
止に効果があるが、シリコーンゴムはコストが高い上や
わらかく、ベルト定着装置のコスト上昇を招くと共に耐
久性に問題が発生してしまう。本発明の目的は、低コス
トで耐久性に富むベルト定着装置を提供することにあ
る。The silicone rubber coated on the fixing belt described above is effective in preventing the occurrence of the satin image by coating it with a thickness (about 1 mm), but the silicone rubber is high in cost. It is soft and causes an increase in cost of the belt fixing device and causes a problem in durability. An object of the present invention is to provide a belt fixing device that is low in cost and has high durability.
【０００５】[0005]
【課題を解決するための手段】そこで、請求項１に記載
した発明では、表面に弾性体層を有する高熱伝導率の無
端ベルトを複数本のベルトローラに巻き掛け、上記ベル
トをその内側面に位置する対向ローラと、その外側面に
位置する加圧ローラとにより挾圧し、該ベルトと上記加
圧ローラにより形成されるニップ部によってトナー像を
加熱溶解定着するベルト定着装置において、上記対向ロ
ーラの表面硬度をＡ、上記弾性体層の硬度をＢ、上記加
圧ローラの表面硬度をＣとしたとき、Ａ≧Ｂ，Ｃ≧Ｂを
満たし、かつ上記弾性体層の厚みが１００μｍ以上であ
ることを特徴としている。Therefore, in the invention described in claim 1, an endless belt having a high thermal conductivity having an elastic layer on the surface is wound around a plurality of belt rollers, and the belt is attached to the inner surface thereof. In a belt fixing device in which a toner image is heated and melted and fixed by a nip portion formed by the belt and the pressure roller, a pressure is applied between the opposed roller and a pressure roller located on the outer side surface of the opposed roller. When the surface hardness is A, the hardness of the elastic layer is B, and the surface hardness of the pressure roller is C, A ≧ B and C ≧ B are satisfied, and the thickness of the elastic layer is 100 μm or more. Is characterized by.
【０００６】また、請求項２記載の発明では、上記対向
ローラが剛体よりなり、加圧ローラＣが円筒形であるこ
とを特徴としており、請求項３記載の発明では、上記対
向ローラが弾性体よりなり、加圧ローラＣが円筒形もし
くは鼓形状であることを特徴としている。Further, in the invention of claim 2, the opposed roller is made of a rigid body, and the pressure roller C is cylindrical, and in the invention of claim 3, the opposed roller is an elastic body. The pressure roller C has a cylindrical shape or a drum shape.
【０００７】[0007]
【作用】ベルトの弾性体層の厚みを１００μｍ以上と
し、対向ローラの表面硬度Ａと加圧ローラの表面硬度Ｃ
を該弾性体層の硬度Ｂと同一もしくは硬く形成するの
で、転写紙の未定着画像側のトナー層の表面に直接当た
る該弾性体層がつぶれ、該トナー層の凹凸が慣らされ、
梨地画像の発生が抑えられる。The elastic layer of the belt has a thickness of 100 μm or more, the surface hardness A of the facing roller and the surface hardness C of the pressure roller.
Is formed to be the same as or harder than the hardness B of the elastic layer, the elastic layer that directly contacts the surface of the toner layer on the unfixed image side of the transfer paper is crushed, and the unevenness of the toner layer is smoothed,
Generation of a satin image is suppressed.
【０００８】[0008]
【実施例】以下、図を用いて本発明の第１の実施例を詳
細に説明する。符号１０１は複写機の定着装置を示す。
この定着装置１０１は、内部に発熱体４を有する正逆回
転可能なベルト加熱ロ−ラ２と従動ローラー３に巻き掛
けられた無端ベルト１と、このベルト１の内側で上記ロ
ーラー２，３の間に位置する対向ローラー６と、ベルト
１を挾んで対向ローラー６に圧接する正逆回転可能で発
熱体７を内蔵した加圧ロ−ラ５とで、主要部が構成され
ている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described in detail below with reference to the drawings. Reference numeral 101 indicates a fixing device of the copying machine.
This fixing device 101 includes a belt heating roller 2 having a heating element 4 therein and capable of rotating in the forward and reverse directions, an endless belt 1 wound around a driven roller 3, and inside the belt 1, the rollers 2 and 3 above. The opposing roller 6 located between them and the pressure roller 5 that is in contact with the opposing roller 6 while sandwiching the belt 1 and is rotatable in forward and reverse directions and has a built-in heating element 7 constitute a main part.
【０００９】加圧ローラ５の周面の前後には、現像剤の
溶剤が浸透しやすい普通紙からなる転写紙Ｐが搬送され
る搬送路を構成するガイド１１，１２が配設されるとと
もに、転写紙Ｐの搬送方向下流側（図において左側）に
は加圧ローラ５に接した分離爪８と一対の排紙ローラ
９，１０が配置されている。Before and after the peripheral surface of the pressure roller 5, guides 11 and 12 are provided which constitute a transport path for transporting a transfer paper P made of plain paper, into which the solvent of the developer easily penetrates. A separation claw 8 in contact with the pressure roller 5 and a pair of paper discharge rollers 9 and 10 are arranged on the downstream side (the left side in the drawing) of the transfer paper P in the conveying direction.
【００１０】ベルト加熱ローラ２により加熱されるベル
ト１と発熱体７により加熱する加圧ローラ５との接触部
位は、図示しない転写部で転写紙Ｐに転写されたトナー
像を加熱溶解定着する定着部（ニップ部）を形成してお
り、定着温度を所定値に保つためローラ２，５には温度
センサ２０，２１がそれぞれ設置されている。The contact portion between the belt 1 heated by the belt heating roller 2 and the pressure roller 5 heated by the heating element 7 is a fixing portion for heating, melting and fixing the toner image transferred onto the transfer paper P at a transfer portion (not shown). Parts (nip parts) are formed, and temperature sensors 20 and 21 are installed on the rollers 2 and 5, respectively, in order to maintain the fixing temperature at a predetermined value.
【００１１】一方、上述したベルト１の表面には、弾性
体層であるゴム硬度４５ＨＳ’のシリコ−ンゴムが２０
０μｍの層厚でコーティングされている。また、対向ロ
ーラ６にはゴム材が用いられ、加圧ローラ５にもゴム材
が巻装されており、両者に用いられているゴム材は、ベ
ルト１にコーティングしたシリコーンゴムの硬度と同じ
硬度４５ＨＳ'のものが用いられている。On the other hand, on the surface of the belt 1 described above, 20 silicone rubber having a rubber hardness of 45HS 'which is an elastic layer is formed.
It is coated with a layer thickness of 0 μm. A rubber material is used for the facing roller 6, and a rubber material is also wound around the pressure roller 5. The rubber material used for both is the same hardness as the silicone rubber coated on the belt 1. 45HS 'is used.
【００１２】ここで、本発明者は、弾性体層の表面硬度
（Ｂ）と加圧ローラ５及び対向ロ−ラ６の表面硬度
（Ａ）,（Ｃ）との関係における梨地画像の発生の有無
について、実験を行なった。以下、その実験について図
２を用いて説明する。The inventors of the present invention have found that the occurrence of a satin image in the relationship between the surface hardness (B) of the elastic layer and the surface hardness (A), (C) of the pressure roller 5 and the opposing roller 6 is generated. An experiment was conducted for the presence or absence. The experiment will be described below with reference to FIG.
【００１３】図２(ａ）は、ベルト１にコーティングす
るシリコーンゴムに（ＪＩＳ−Ａ）の規格でゴム硬度４
５ＨＳ'のものを層厚１００μｍにして使用し、図２
(ｂ)は、同シリコーンゴムの層厚を３００μｍとし、さ
らに、対向ローラ６と加圧ローラ５に用いるゴム材の硬
度をそれぞれ３０，４５，６０ＨＳ'に設定し、各組合
せによる梨地の発生状態について５段階の評価をしたも
のである。FIG. 2 (a) shows that the silicone rubber coated on the belt 1 has a rubber hardness of 4 according to the (JIS-A) standard.
2HS 'was used with a layer thickness of 100 μm.
(b) shows that the layer thickness of the silicone rubber is 300 μm, and the hardness of the rubber material used for the opposing roller 6 and the pressure roller 5 is set to 30, 45, and 60 HS ', respectively, and the state of occurrence of satin finish by each combination Is a five-level evaluation.
【００１４】梨地の状態はランク１が梨地の発生が多
く、ランク５が梨地の発生がない状態、すなわち転写紙
上に定着された画像状態が極めて良い状態を示し、ラン
ク４以上を合格（採用ライン）と定めた。また、固定条
件として、画像はフルカラー３色重ねで、トナー付着量
は１ｍｇ／ｃｍ2のべた画像、ニップ部の面圧は１ｋｇ
ｆ／ｃｍ2とした。Regarding the satin finish, rank 1 shows a lot of satin finish, and rank 5 shows no pear finish, that is, the state of the image fixed on the transfer paper is very good. ). As fixed conditions, the image is a three-color full-color image, the toner adhesion amount is 1 mg / cm 2 , and the surface pressure at the nip portion is 1 kg.
It was set to f / cm 2 .
【００１５】図２(ａ)，(ｂ）によると、シリコーンゴ
ムの層厚が１００μｍｍの場合、加圧ローラ５，対向ロ
ーラ６の硬度(Ｃ),(Ａ)が共に４５ＨＳ'以上の時は、ラ
ンク４から５を示し、シリコーンゴムの層厚が３００μ
ｍの場合、加圧ローラ５，対向ローラ６の硬度(Ｃ),
(Ａ)が共に４５ＨＳ'の時で、最高のランクである５を
示している。また、図示はしていないが、シリコーンゴ
ムの層厚が５０μｍの場合には、加圧ローラ５，対向ロ
ーラ６の硬度(Ｃ),(Ａ)が共に６０ＨＳ'の場合のみ、ラ
ンク４であり、その他の組合せではランク３以下であっ
た。According to FIGS. 2 (a) and 2 (b), when the layer thickness of the silicone rubber is 100 μm and the hardnesses (C) and (A) of the pressure roller 5 and the opposing roller 6 are both 45HS 'or more, , Ranks 4 to 5, with a silicone rubber layer thickness of 300μ
In the case of m, the hardness (C) of the pressure roller 5 and the counter roller 6,
When (A) is both 45HS ', it shows 5 which is the highest rank. Although not shown, when the layer thickness of the silicone rubber is 50 μm, the rank is 4 only when the hardness (C) and (A) of the pressure roller 5 and the opposing roller 6 are both 60HS '. , And other combinations were ranked 3 or lower.
【００１６】従って梨地が発生しない条件としては、 ベルト１のシリコーンゴム層厚１００μｍｍ以上 対向ローラ６のゴム硬度(Ａ)≧ベルト１のシリコーンゴ
ム硬度(Ｂ) 加圧ローラ５のゴム硬度(Ｃ)≧ベルト１のシリコーンゴ
ム硬度(Ｂ) という条件を満たせば良いことになる。Therefore, the conditions under which the satin finish does not occur are that the thickness of the silicone rubber layer of the belt 1 is 100 μm or more, the rubber hardness of the facing roller 6 (A) ≧ the silicone rubber hardness of the belt 1 (B), the rubber hardness of the pressure roller 5 (C) It suffices if the condition of ≧ belt 1 silicone rubber hardness (B) is satisfied.
【００１７】換言すると、上記条件は、トナー像に直接
当たるシリコーンゴム層をつぶすことができれば、梨地
は形成されることはなくなる。但し、上記シリコーンゴ
ム層が５０μｍではつぶれる量が少なく、ベルト１が剛
体のときと同様の作用が働いてしまうので、梨地画像が
発生してしまうことになる。In other words, under the above conditions, if the silicone rubber layer directly hitting the toner image can be crushed, the satin finish will not be formed. However, when the silicone rubber layer has a thickness of 50 μm, the amount of crushing is small, and the same action as when the belt 1 is a rigid body works, so that a satin image is generated.
【００１８】従って、本実施例では、ベルト１にゴム硬
度４５ＨＳ'のシリコ−ンゴムがコーティングされ、対
向ローラ６と加圧ローラ５には硬度４５ＨＳ'のゴム材
が用いられているので、転写紙Ｐが定着部に搬送される
と、発熱体４によって加熱されたローラ２を介して蓄熱
されるベルト１に、自身の内部より加熱される加圧ロ−
ラ５が押圧すると、対向ローラ６と加圧ローラ５に挾ま
れるベルト１は十分に弾性変形して転写紙上の未定着画
像（トナー像）を挾圧し加熱溶解定着する。そして、定
着がなされた転写紙Ｐは、ガイド１２に案内されて排紙
ローラー９，１０により図示しない排紙トレー上に排出
される。Therefore, in this embodiment, the belt 1 is coated with silicone rubber having a rubber hardness of 45HS ', and the opposing roller 6 and the pressure roller 5 are made of a rubber material having a hardness of 45HS'. When P is conveyed to the fixing unit, the belt 1 that is heated by the heating element 4 and stores heat through the roller 2 is heated by the pressure roller.
When the roller 5 presses, the belt 1 sandwiched between the opposing roller 6 and the pressure roller 5 is sufficiently elastically deformed, and the unfixed image (toner image) on the transfer paper is pinched to heat, melt, and fix it. Then, the fixed transfer paper P is guided by the guide 12 and discharged onto a paper discharge tray (not shown) by the paper discharge rollers 9 and 10.
【００１９】次に、本発明の第２の実施例について説明
する。第２の実施例は、上記第１の実施例におけるベル
ト１にコーティングしたシリコーンゴム層だけをより弾
性変形させる（つぶす）ために、対向ローラ６と加圧ロ
ーラ５の材質を第１の実施例よりも硬質としたものであ
る。Next, a second embodiment of the present invention will be described. In the second embodiment, in order to more elastically deform (crush) only the silicone rubber layer coated on the belt 1 in the first embodiment, the materials of the facing roller 6 and the pressure roller 5 are set to the first embodiment. It is harder than.
【００２０】具体的には、対向ローラー６をステンレス
（ＳＵＳ）製にし、加圧ローラ５にテフロンローラを使
用して、更に、このテフロンローラの外周面を内側に
０．０８ｍｍ窪ませた鼓形状とし、ベルト１にコーティ
ングするシリコーンゴムの層厚が１００μｍと３００μ
ｍにおける梨地画像の発生状態の実験を行なところ、シ
リコーンゴムの層厚１００μｍ，３００μｍ共にランク
５を示す結果が得られた。しかし、ここで新たな問題が
発生した。Specifically, the opposing roller 6 is made of stainless steel (SUS), a Teflon roller is used as the pressure roller 5, and the outer peripheral surface of the Teflon roller is recessed inward by 0.08 mm. The thickness of the silicone rubber coating on the belt 1 is 100 μm and 300 μm.
An experiment was conducted on the generation state of a satin image at m, and the results showing rank 5 were obtained for both the silicone rubber layer thicknesses of 100 μm and 300 μm. However, a new problem arose here.
【００２１】つまり、対向ローラ６と加圧ローラ５をあ
る程度硬質にしてもベルト１の弾性体層を厚くすれば梨
地の発生を防ぐことはできたが、加圧ローラ５を鼓形状
にしたために転写部の中央部に定着不足が発生した。In other words, even if the opposing roller 6 and the pressure roller 5 are hardened to a certain extent, it is possible to prevent the occurrence of the satin finish by making the elastic layer of the belt 1 thick, but since the pressure roller 5 has a drum shape. Insufficient fixing occurred in the center of the transfer area.
【００２２】そこで、加圧ローラ５の鼓量を変化させる
と共に、対向ローラ６の材質にゴム材とステンレス（Ｓ
ＵＳ）材とを用いて、定着性の実験を行なった。その時
の実験結果を示すものが図３である。図に示す○×印は
定着度の良不を示したもので、○印が定着状態良好で×
印が良くない状態を示す。Therefore, the drum amount of the pressure roller 5 is changed, and the opposing roller 6 is made of rubber or stainless steel (S).
US) material was used to perform the fixing property experiment. FIG. 3 shows the experimental result at that time. The ◯ mark in the figure shows the quality of the fixing, and the ◯ mark means the fixing condition is good.
Indicates that the mark is not good.
【００２３】この図によると、対向ローラ６が（ＳＵ
Ｓ）の場合、加圧ローラ５に鼓量がないとき定着状態が
よく、対向ローラ６がゴム製であるときは、加圧ローラ
５に鼓量があっても満足のいく定着状態を示している。
つまり、対向ローラ６が剛体である時、加圧ローラ５は
円筒形がよく、対向ローラ６が弾性材であれば加圧ロー
ラ５は円筒形でも鼓形状でもどちらでも良いということ
である。According to this figure, the opposing roller 6 is (SU
In the case of S), the fixing state is good when the pressure roller 5 does not have a drumbeat, and when the opposing roller 6 is made of rubber, a satisfactory fixing state is shown even if the pressure roller 5 has a drumbeat. There is.
That is, when the opposed roller 6 is a rigid body, the pressure roller 5 is preferably cylindrical, and if the opposed roller 6 is an elastic material, the pressure roller 5 may be cylindrical or drum-shaped.
【００２４】すなわち、対向ローラ６が剛体で加圧ロー
ラ５が円筒形であると、ニップ幅が均一に得られ、良好
な定着性を得ることができ、対向ローラ６が弾性体であ
ると、それが加圧ローラ５の表面形状にそって弾性変形
するので、加圧ローラ５が円筒形でなく鼓形状であって
も所定のニップ幅を得られ、シワのない良好な画像が形
成されるということである。That is, when the opposed roller 6 is rigid and the pressure roller 5 is cylindrical, a uniform nip width can be obtained and good fixing performance can be obtained, and when the opposed roller 6 is an elastic body, Since it elastically deforms along the surface shape of the pressure roller 5, a predetermined nip width can be obtained even if the pressure roller 5 is not a cylindrical shape but a drum shape, and a good image without wrinkles is formed. That's what it means.
【００２５】[0025]
【発明の効果】以上、本発明によれば、定着ベルトの弾
性体層の厚みや表面硬度、対向、加圧の各ローラの表面
硬度を調整することにより、上記定着ベルトにコーティ
ングする弾性体層の肉厚が薄くとも良好な転写画像を得
ることができ、コストが低く耐久性に富むベルト定着装
置を提供することができる。As described above, according to the present invention, the elastic layer coated on the fixing belt by adjusting the thickness and surface hardness of the elastic layer of the fixing belt and the surface hardness of each of the facing roller and the pressing roller. A good transfer image can be obtained even if the thickness is small, and a belt fixing device having low cost and high durability can be provided.
【図１】本発明を実施したベルト定着装置の構成を示す
構成図である。FIG. 1 is a configuration diagram showing a configuration of a belt fixing device embodying the present invention.
【図２】（ａ),(ｂ）は定着ベルト、対向ローラ、加圧
ローラの硬度と厚みの関係を示す実験データである。2A and 2B are experimental data showing a relationship between hardness and thickness of a fixing belt, a facing roller, and a pressure roller.
【図３】対向ローラと加圧ローラの材質と形状の関係を
示す実験データである。FIG. 3 is experimental data showing a relationship between materials and shapes of a facing roller and a pressure roller.
１ 無端ベルト ５ 加圧ローラ ６ 対向ローラ Ａ 対向ローラの表面硬度 Ｂ 弾性体層の硬度 Ｃ 加圧ローラの表面硬度 Ｐ 転写紙 1 Endless Belt 5 Pressure Roller 6 Opposing Roller A Surface Hardness of Opposing Roller B Hardness of Elastic Layer C Surface Hardness of Pressure Roller P Transfer Paper
Claims (3)
ベルトを複数本のベルトローラに巻き掛け、上記ベルト
をその内側面に位置する対向ローラと、その外側面に位
置する加圧ローラとにより挾圧し、該ベルトと上記加圧
ローラにより形成されるニップ部によってトナー像を加
熱溶解定着するベルト定着装置において、 上記対向ローラの表面硬度をＡ、上記弾性体層の硬度を
Ｂ、上記加圧ローラの表面硬度をＣとしたとき、 Ａ≧Ｂ，Ｃ≧Ｂを満たし、かつ上記弾性体層の厚みが１
００μｍ以上であることを特徴とするベルト定着装置。1. A high thermal conductivity endless belt having an elastic layer on the surface thereof is wound around a plurality of belt rollers, and the belt is provided with an opposing roller located on the inner side surface thereof and a pressure roller located on the outer side surface thereof. In a belt fixing device in which the toner image is melted and fixed by a nip portion formed by the belt and the pressure roller, the surface hardness of the facing roller is A, the hardness of the elastic layer is B, and When the surface hardness of the pressure roller is C, A ≧ B and C ≧ B are satisfied, and the thickness of the elastic layer is 1
A belt fixing device having a diameter of at least 00 μm.
ラＣが円筒形であることを特徴とする請求項１記載のベ
ルト定着装置。2. The belt fixing device according to claim 1, wherein the opposed roller is made of a rigid body, and the pressure roller C has a cylindrical shape.
ーラＣが円筒形もしくは鼓形状であることを特徴とする
請求項１記載のベルト定着装置。3. The belt fixing device according to claim 1, wherein the facing roller is made of an elastic material, and the pressure roller C is cylindrical or drum-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03243617A JP3073805B2 (en) | 1991-09-24 | 1991-09-24 | Belt fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03243617A JP3073805B2 (en) | 1991-09-24 | 1991-09-24 | Belt fixing device |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP36085099A Division JP3558939B2 (en) | 1999-12-20 | 1999-12-20 | Belt fixing device and image forming device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0580666A true JPH0580666A (en) | 1993-04-02 |
| JP3073805B2 JP3073805B2 (en) | 2000-08-07 |
Family
ID=17106488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03243617A Expired - Lifetime JP3073805B2 (en) | 1991-09-24 | 1991-09-24 | Belt fixing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3073805B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6091926A (en) * | 1998-03-27 | 2000-07-18 | Ricoh Company, Ltd. | Fixing device using a belt for an image forming apparatus |
| US6137983A (en) * | 1998-02-04 | 2000-10-24 | Minolta Co., Ltd. | Fixing belt, fixing apparatus equipped with fixing belt, and method of manufacturing fixing belt |
| US6181891B1 (en) * | 1998-06-01 | 2001-01-30 | Nitto Kogyo Co., Ltd. | Toner image fixing apparatus capable of keeping constant fixing roller temperature |
| US6243559B1 (en) | 1996-10-04 | 2001-06-05 | Ricoh Company, Ltd. | Belt fixing device |
| US6895205B2 (en) | 2002-07-17 | 2005-05-17 | Fuji Xerox Co., Ltd. | Image fixing apparatus with cooling unit and image fixing method |
| US7177580B2 (en) | 2003-11-28 | 2007-02-13 | Ricoh Co., Ltd. | Image forming method and apparatus for fixing an image |
| US11592770B2 (en) | 2021-03-19 | 2023-02-28 | Ricoh Company, Ltd. | Pressing device, fixing device, and image forming apparatus incorporating fixing device |
-
1991
- 1991-09-24 JP JP03243617A patent/JP3073805B2/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6243559B1 (en) | 1996-10-04 | 2001-06-05 | Ricoh Company, Ltd. | Belt fixing device |
| US6137983A (en) * | 1998-02-04 | 2000-10-24 | Minolta Co., Ltd. | Fixing belt, fixing apparatus equipped with fixing belt, and method of manufacturing fixing belt |
| US6091926A (en) * | 1998-03-27 | 2000-07-18 | Ricoh Company, Ltd. | Fixing device using a belt for an image forming apparatus |
| US6181891B1 (en) * | 1998-06-01 | 2001-01-30 | Nitto Kogyo Co., Ltd. | Toner image fixing apparatus capable of keeping constant fixing roller temperature |
| US6333490B1 (en) | 1998-06-01 | 2001-12-25 | Nitto Kogyo Co., Ltd. | Toner image fixing apparatus capable of keeping constant fixing roller temperature |
| US6895205B2 (en) | 2002-07-17 | 2005-05-17 | Fuji Xerox Co., Ltd. | Image fixing apparatus with cooling unit and image fixing method |
| US7177580B2 (en) | 2003-11-28 | 2007-02-13 | Ricoh Co., Ltd. | Image forming method and apparatus for fixing an image |
| US7570911B2 (en) | 2003-11-28 | 2009-08-04 | Ricoh Co., Ltd. | Image forming method and apparatus for fixing an image |
| US11592770B2 (en) | 2021-03-19 | 2023-02-28 | Ricoh Company, Ltd. | Pressing device, fixing device, and image forming apparatus incorporating fixing device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3073805B2 (en) | 2000-08-07 |
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