JPH04301669A - Fixing roller and fixing device - Google Patents
Fixing roller and fixing deviceInfo
- Publication number
- JPH04301669A JPH04301669A JP6583091A JP6583091A JPH04301669A JP H04301669 A JPH04301669 A JP H04301669A JP 6583091 A JP6583091 A JP 6583091A JP 6583091 A JP6583091 A JP 6583091A JP H04301669 A JPH04301669 A JP H04301669A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- tubes
- fixing
- roller
- layer
- 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
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000000126 substance Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 7
- 239000000853 adhesive Substances 0.000 abstract description 3
- 230000001070 adhesive effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000002265 prevention Effects 0.000 abstract 1
- 230000003578 releasing effect Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 29
- 239000002184 metal Substances 0.000 description 8
- 239000004810 polytetrafluoroethylene Substances 0.000 description 6
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 6
- 239000002344 surface layer Substances 0.000 description 6
- 239000002356 single layer Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000002087 whitening effect Effects 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000004944 Liquid Silicone Rubber Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005686 electrostatic field Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Landscapes
- Fixing For Electrophotography (AREA)
- Control Of Resistance Heating (AREA)
- Laminated Bodies (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は複写機、プリンタ等の画
像形成装置に使用され未定着画像を定着するための定着
用ローラ及び定着装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing roller and a fixing device used in image forming apparatuses such as copying machines and printers for fixing unfixed images.
【０００２】［背景技術］定着装置の一例を図２に示す
。[Background Art] An example of a fixing device is shown in FIG.
【０００３】１は未定着トナー５，５´と接する定着ロ
ーラ、２は定着ローラ１と圧接する加圧ローラでニップ
Ｎを形成している。A nip N is formed by a fixing roller 1 in contact with the unfixed toners 5 and 5', and a pressure roller 2 in pressure contact with the fixing roller 1.
【０００４】定着ローラ１は剛体金属パイプより成る芯
金１１上にＰＦＡ又はＰＴＦＥ等の耐熱性・高離型性を
有する表面層１２をプライマ等により接着焼成したもの
が用いられる。The fixing roller 1 is made by adhering and firing a surface layer 12 of PFA or PTFE having heat resistance and high mold releasability onto a core metal 11 made of a rigid metal pipe using a primer or the like.
【０００５】ヒータ３により定着ローラ１は内面加熱さ
れ、ローラ表面温度を温度センサー（不図示）によりモ
ニターして、ヒータ３をオン・オフすることにより一定
の表面温度に保たれる。加圧ローラ２は金属棒より成る
芯金２１上に弾性ゴム層２２を形成し、その上にＰＦＡ
又はＰＴＦＥ等の耐熱性、高離型性を有する表面層２３
をプライマ等により接着焼成される。The inner surface of the fixing roller 1 is heated by the heater 3, and the surface temperature of the roller is monitored by a temperature sensor (not shown) and kept at a constant surface temperature by turning the heater 3 on and off. The pressure roller 2 has an elastic rubber layer 22 formed on a core bar 21 made of a metal rod, and a PFA
Or a surface layer 23 having heat resistance and high mold release properties such as PTFE.
are bonded and fired using a primer or the like.
【０００６】加圧ローラ２はバネ等の付勢手段（不図示
）により定着ローラ１に押圧される。The pressure roller 2 is pressed against the fixing roller 1 by a biasing means (not shown) such as a spring.
【０００７】未定着の粉体トナーを支持した紙葉体４は
、矢印方向が回転するローラ対のニップＮに挿通され、
加熱、加圧作用によりトナー５は紙葉体４に永久定着さ
れる。The paper sheet 4 supporting the unfixed powder toner is inserted into a nip N between a pair of rollers rotating in the direction of the arrow.
The toner 5 is permanently fixed on the paper sheet 4 by heating and pressure.
【０００８】６は芯金１１にトナー５と同極性のバイア
ス電圧を付与するバイアス電源で、ニップＮ内でトナー
５を定着ローラ１から引離す静電界を形成し、表面層１
２へのトナー５の吸着を防ぎ、後続の紙葉体４の被画像
部の汚れ（所謂オフセット現象）を防ぐものである。A bias power source 6 applies a bias voltage of the same polarity as that of the toner 5 to the core metal 11, which forms an electrostatic field that separates the toner 5 from the fixing roller 1 within the nip N, and the surface layer 1
This prevents the toner 5 from adhering to the sheet 2 and prevents the image area of the subsequent paper sheet 4 from becoming dirty (so-called offset phenomenon).
【０００９】またバイアス電圧を加えてオフセットを防
止するためにはダイオード等を使用することもできる。A diode or the like may also be used to apply a bias voltage and prevent offset.
【００１０】このようにバイアス電圧による電界により
静電的にオフセットを防止する場合、バイアス電圧のリ
ークを防止するために定着ローラ１の表面層１２は絶縁
性とし、できる限りピンホール等の局部的な電気的ブレ
イクダウンの生じない層構成とすることが好ましい。When offset is electrostatically prevented by an electric field generated by a bias voltage, the surface layer 12 of the fixing roller 1 is made insulative to prevent leakage of the bias voltage, and localized pinholes etc. are prevented as much as possible. It is preferable to have a layer structure that does not cause electrical breakdown.
【００１１】このためＰＦＡやＰＴＦＥをスプレー塗布
して加熱溶融させて層と成すコーティング法によるもの
よりも、熱収縮チュープ状に形成されたＰＦＡやＰＴＦ
Ｅを芯金１１に被覆して加熱溶融させて層と成すチュー
ブ法による方が層の均一性が得られるために優れている
。For this reason, PFA or PTF formed into a heat-shrinkable tube is preferable to a coating method in which PFA or PTFE is spray-coated and heated and melted to form a layer.
The tube method, in which E is coated on the core metal 11 and heated and melted to form a layer, is better because it provides uniformity of the layer.
【００１２】また、加圧ローラの表面層としても層がよ
り均一に構成出来るチュープを用いた方が、コーティン
グ法によるものよりも紙葉体４の通紙を繰返した時の紙
葉体の末端部の摩耗が少ない等強度的に優れている。更
には紙葉体４との摩擦帯電により加圧ローラ２がチャー
ブアップして、電源６による静電回を打ち消し、オフセ
ット減少を将来することがあるので、表面層２３として
は例えばＰＦＡにカーボンを分散して体積抵抗率１０７
−１０Ω・ｃｍとした導電性チューブを用いることが好
ましい。Furthermore, it is better to use a tube as the surface layer of the pressure roller because it can form a more uniform layer than when using a coating method. Excellent strength with less wear on parts. Furthermore, the pressure roller 2 may char up due to frictional charging with the paper sheet 4, canceling out the electrostatic charge generated by the power source 6, and reducing the offset in the future. By dispersing the volume resistivity 107
It is preferable to use a conductive tube with a resistance of −10 Ω·cm.
【００１３】[0013]
【発明が解決しょうとする問題点】しかし、芯金１１に
電源６よりバイアス電圧を印加してトナー５を載せた紙
葉体４を通紙すると、表面層１２のチューブ上にトナー
５が局所的に付着することがある。図３に、その様子を
示した。実際に付着したトナー５をアルコール拭き等で
除去するとチューブ１２の該当箇所には白化した跡が認
められるが、所謂ピンホールの如き光学的に認定できる
“穴”は生じていない。このトナー付着のメカニズムは
、以下のように推定される：チューブ１２の成形時にＰ
ＦＡやＰＴＦＥが熱変性し、特に押出し成形機内の滞留
を生ずるような箇所では炭化が生じるため、このような
電気的には導電的な異物がチューブ１２内に混入するこ
とにより、目視では一見して均一に見えるものの電気的
にはブレイクダウンを生じ易い弱い箇所７（以下、リー
クサイト７と称する）が発生する。リークサイト７はロ
ーラが使用されるに従い、電気的にブレイクダウンして
そこに電流が集中しチューブ１２の白化が生じる。電界
はリークサイト７部に集中するため、トナー５は誘電分
極してリークサイト７に吸引される。又、トナー５の中
に微量に混じっている反対極性のトナー５´は、特にリ
ークサイト７に吸引され易く、リークサイト７部にトナ
ー５、トナー５´の塊が形成される。[Problems to be Solved by the Invention] However, when a bias voltage is applied to the core metal 11 from the power supply 6 and the paper sheet 4 carrying the toner 5 is passed through, the toner 5 is locally deposited on the tube of the surface layer 12. may adhere to surfaces. Figure 3 shows the situation. When the adhered toner 5 is actually removed by alcohol wiping or the like, whitening traces are found in the corresponding portions of the tube 12, but no optically recognizable "holes" such as so-called pinholes are formed. The mechanism of this toner adhesion is estimated as follows: when forming the tube 12, P
FA and PTFE are thermally denatured and carbonized, especially in areas where they accumulate inside the extrusion molding machine, so if such electrically conductive foreign matter gets into the tube 12, it may not be visible to the naked eye. Although it appears uniform, electrically weak points 7 (hereinafter referred to as leak sites 7) that are likely to cause breakdown occur. As the roller is used, the leak site 7 electrically breaks down and current concentrates there, causing whitening of the tube 12. Since the electric field is concentrated at the leak site 7, the toner 5 is dielectrically polarized and attracted to the leak site 7. Further, the toner 5' of the opposite polarity, which is mixed in a small amount in the toner 5, is particularly easily attracted to the leak site 7, and a lump of toner 5 and toner 5' is formed at the leak site 7.
【００１４】また、加圧ローラにチューブを設ける場合
、成形時にチューブの破損を生じることがある。Furthermore, when a tube is provided on the pressure roller, the tube may be damaged during molding.
【００１５】図４に成形方法の一例を示す。FIG. 4 shows an example of the molding method.
【００１６】金型８の内壁に内面に接着剤を付与したチ
ューブ２３を沿わせ、チューブを金型８の外側に折り返
してストッパ９で固定する。次に芯金２１をセットし、
蓋１０，１０´を閉めて液状ゴムを蓋１０の注入口より
入れ、余剰分を蓋１０´の排出口より出す。金型８内に
液状ビムが充満した時点で加熱し、ゴムを架橋させて弾
性層２２とする。架橋工程終了後、蓋１０，１１を外し
、芯金２１上に弾性層２２及びチューブ２３が形成され
たものを取出し、両端をカットして加圧ローラ２とし、
再度加熱して、加圧ローラ２が完成する。A tube 23 whose inner surface is coated with adhesive is placed along the inner wall of the mold 8, and the tube is folded back to the outside of the mold 8 and fixed with a stopper 9. Next, set the core bar 21,
The lids 10 and 10' are closed, liquid rubber is introduced through the inlet of the lid 10, and the excess is taken out through the outlet of the lid 10'. Once the mold 8 is filled with liquid VIM, it is heated to crosslink the rubber and form the elastic layer 22. After the crosslinking process is completed, the lids 10 and 11 are removed, and the core bar 21 with the elastic layer 22 and tube 23 formed thereon is taken out, and both ends are cut to form the pressure roller 2.
The pressure roller 2 is completed by heating again.
【００１７】成形工程において、チューブ２３を金型８
にセットし、上・下でチューブ２３の径を引き延ばす際
にチューブ２３の破損が生じることがある。特にＰＦＡ
中にカーボンを分散した導電性チューブの場合には、純
粋ＰＦＡチューブに比べて強度が下がるので、破損が生
じ易く、加圧ローラ２成形工程の歩留りを低下させる大
きな要因である。In the molding process, the tube 23 is placed in a mold 8.
The tube 23 may be damaged when the diameter of the tube 23 is stretched at the top and bottom. Especially PFA
In the case of a conductive tube in which carbon is dispersed, its strength is lower than that of a pure PFA tube, so it is easily damaged, which is a major factor in reducing the yield of the pressure roller 2 forming process.
【００１８】[0018]
【問題点を解決するための手段】上記問題点を解決する
本発明は、被定着画像を支持した支持材を挟持搬送して
定着するための定着用ローラにおいて、表面を複数層の
チューブで被覆したことを特徴とするもの、及び、未定
着画像を支持した支持材を挟持搬送して定着するための
定着ローラ対と、このローラ対の少なくとも一方にバイ
アス電圧を加えるバイアス手段と、を有する定着装置に
おいて、上記定着ローラ対の少なくとも一方は表面を複
数層のチューブで被覆したことを特徴とするものである
。[Means for Solving the Problems] The present invention solves the above-mentioned problems by providing a fixing roller for nipping and conveying and fixing a support material supporting a fixed image, the surface of which is covered with a plurality of layers of tubes. A fixing device comprising: a pair of fixing rollers for nipping and conveying a support material supporting an unfixed image and fixing the image; and a bias means for applying a bias voltage to at least one of the pair of rollers. The apparatus is characterized in that the surface of at least one of the pair of fixing rollers is covered with a plurality of layers of tubes.
【００１９】[0019]
【実施例】以下本発明の実施例を図面に基づき説明する
。[Embodiments] Hereinafter, embodiments of the present invention will be explained based on the drawings.
【００２０】尚、同一部材には同一番号を符してある。Note that the same members are designated by the same numbers.
【００２１】図１は本発明の大１実施例の定着用の定着
ローラ１の斜視図である。１２１及び１２２はともにＰ
ＦＡ又はＰＴＦＥ等の耐熱性・離型性に優れたビュアな
フッ素樹脂からなるチューブである。FIG. 1 is a perspective view of a fixing roller 1 for fixing according to a first embodiment of the present invention. 121 and 122 are both P
The tube is made of a transparent fluororesin with excellent heat resistance and mold releasability, such as FA or PTFE.
【００２２】このチューブ１２１，１２２は同一材料か
らなり、押出し成形により２層構成チューブ１２´とし
て、芯金１１上に接着剤を介して加熱成形したものであ
る。オフセット現象防止の目的ではチュープ１２´の総
厚は３０〜２００μｍの範囲であるのが好ましい。チュ
ーブ１２´を構成するチューブ１２１及びチューブ１２
２の厚さは、成形工程管理上は同じ厚さがある方が好ま
しいが、以下に述べるリークサイト７に起因するトナー
塊の発生を防止する上では、チューブ１２１とチューブ
１２２の厚さが異なる場合でも同様の効果が期待できる
。The tubes 121 and 122 are made of the same material and are extrusion-molded to form a two-layered tube 12' on the core bar 11 using an adhesive. For the purpose of preventing the offset phenomenon, the total thickness of the tube 12' is preferably in the range of 30 to 200 μm. Tube 121 and tube 12 that constitute tube 12'
It is preferable for tubes 121 and 122 to have the same thickness in terms of molding process control, but in order to prevent the generation of toner lumps caused by leak site 7 described below, the thicknesses of tubes 121 and 122 are different. A similar effect can be expected in any case.
【００２３】図５に図２に示される装置で図１に示され
る第１実施例の定着ローラを用いた定着装置のニップの
拡大断面図を示す。FIG. 5 shows an enlarged sectional view of the nip of the fixing device using the fixing roller of the first embodiment shown in FIG. 1 in the apparatus shown in FIG.
【００２４】単層のチューブ１２を用いた場合、リーク
サイトによるトナー付着は１０％のローラで発生したが
、２層チューブ１２´としたことでトナー付着の発生率
は１％未満に減少した。これは、チューブ１２１の中の
リークサイト７とチューブ１２２の中のリークサイトが
重なり合わぬ限り電界集中は生じないためで、こうした
重なり合いの確率はチューブ１２´を２層構成とするこ
とにより、単層におけるリークサイト７の存在確率（≪
１）の２乗の存在確率となるために、トナー付着の発生
率が大きく減少する。When the single-layer tube 12 was used, toner adhesion due to leak sites occurred in 10% of the rollers, but by using the double-layer tube 12', the incidence of toner adhesion was reduced to less than 1%. This is because electric field concentration will not occur unless the leak sites 7 in the tube 121 and the leak sites in the tube 122 overlap, and the probability of such overlap can be reduced by making the tube 12' have a two-layer structure. Existence probability of leak site 7 in the layer (≪
Since the probability of existence is the square of 1), the incidence of toner adhesion is greatly reduced.
【００２５】尚、リークサイト７のような電気的局部欠
陥の箇所を除けば、層が均一に形成されている限りはＰ
ＦＡ又はＰＴＦＥの場合チューブ１２１，１２２の厚さ
が２５μあれば１ＫＶの耐圧を十分に有している。この
ように２層チューブ１２´とすることにより、定着ロー
ラ１の成形歩留りが飛躍的に向上する。[0025] As long as the layer is formed uniformly, except for locations with electrical local defects such as the leak site 7, P
In the case of FA or PTFE, if the tubes 121 and 122 have a thickness of 25 μm, they have a sufficient withstand voltage of 1 KV. By forming the two-layer tube 12' in this manner, the molding yield of the fixing roller 1 is dramatically improved.
【００２６】又、同様の効果は芯金１１上に一担チュー
ブ１２１を加熱成形した上で、更にチューブ１２２を加
熱成形することでも得られるが、２層チューブ１２´を
一度に加熱成形する方が工程数が減らせるというメリッ
トがある。The same effect can also be obtained by heat-forming the single-layer tube 121 on the core bar 11 and then heat-forming the tube 122, but it is better to heat-form the two-layer tube 12' at once. has the advantage of reducing the number of steps.
【００２７】図６は本発明の第２実施例の定着用の加圧
ローラ２を示すもので、前出と同符号は同部材を示す。
２３´は２層チューブであり、２３１はＰＦＡチューブ
であり、２３２はカーボンを分散したＰＦＡチューブで
ある。つまり、加圧ローラ２は金型８に２層チューブ２
３´をチューブ２３１が内面となり、チューブ２３２が
壁面に沿うようにしてセットされ、導電性の液状シリコ
ンゴムを注型して成形される。弾性層２２は、１０２〜
１０１０Ω・ｃｍの体積抵抗率を有し、ＰＦＡチューブ
２３１は２５〜１００μｍ、低抵抗物質であるカーボン
を分散した導電性ＰＦＡチューブ２３２は２５〜１００
μｍの厚さで、２層チューブ２３´の総厚は５０〜１５
０μｍとすることで、オフセット現象は防止出来る。FIG. 6 shows a pressure roller 2 for fixing according to a second embodiment of the present invention, and the same reference numerals as above indicate the same members. 23' is a two-layer tube, 231 is a PFA tube, and 232 is a PFA tube in which carbon is dispersed. In other words, the pressure roller 2 is attached to the mold 8 with the two-layer tube 2
3' is set so that the tube 231 becomes the inner surface and the tube 232 runs along the wall surface, and is molded by casting conductive liquid silicone rubber. The elastic layer 22 has 102~
The PFA tube 231 has a volume resistivity of 1010 Ω·cm, and the conductive PFA tube 232 has a volume resistivity of 25 to 100 μm, and the conductive PFA tube 232 in which carbon, which is a low resistance substance, is dispersed has a volume resistivity of 25 to 100 μm.
With a thickness of μm, the total thickness of the double-layer tube 23' is 50-15
By setting it to 0 μm, the offset phenomenon can be prevented.
【００２８】本実施例のように、強度的に弱い低抵抗物
質を分散した導電性ＰＦＡチューブ２３２を強度の十分
に大きな純粋ＰＦＡチューブ２３１と組合せて２層チュ
ーブ２３´とすることで、総合的な強度を従来の単層の
導電性ＰＦＡチューブ２３よりも向上させ、金型８への
チューブ２３´セットの時の破損が防止出来て、成形上
の歩留りが向上するとともに、最表層に導電性ＰＦＡチ
ューブ２３２があり、加圧ローラ２全体としても抵抗値
が１０５〜１０１１Ω程度に維持されることで紙葉体４
との摩擦帯電が効果的に防止出来、オフセット現象が防
止される。As in this embodiment, by combining the conductive PFA tube 232 in which a low-resistance material with weak strength is dispersed with the pure PFA tube 231 with sufficient strength to form a two-layer tube 23', the overall The strength of the conductive PFA tube 23 has been improved compared to the conventional single-layer conductive PFA tube 23, and damage when setting the tube 23' into the mold 8 can be prevented, improving molding yield, and the outermost layer is conductive. There is a PFA tube 232, and the resistance value of the pressure roller 2 as a whole is maintained at about 105 to 1011Ω, so that the paper sheet 4
Frictional charging can be effectively prevented, and the offset phenomenon can be prevented.
【００２９】図８の第１実施例の定着ローラと第２実施
例の加圧ローラを共に用いた定着装置の断面図であり、
更に装置としての信頼性を高めることができる。FIG. 9 is a sectional view of a fixing device using both the fixing roller of the first embodiment shown in FIG. 8 and the pressure roller of the second embodiment;
Furthermore, the reliability of the device can be improved.
【００３０】尚、本実施例においてもダイオード等によ
りバイアス電圧を加えてもよい。In this embodiment as well, a bias voltage may be applied using a diode or the like.
【００３１】以上の実施例においては、２層構成のチュ
ーブ１２´，２３´につき説明したが、本発明の主旨は
２層に限定されるものではなく、例えば図７に示すよう
に３層構成のチューブ１２″により、リークサイト７起
因のトナー付着は第１実施例よりも更に有効に防止出来
ることは明らかである。つまり、この場合は実質的なリ
ークサイト７の存在確率は単層チューブ１２におけるリ
ークサイト７の存在確率（≪１）の３乗の存在確率とな
り、第１実施例におけるよりも更にトナー付着が発生す
る確率が減る。In the above embodiments, the tubes 12' and 23' having a two-layer structure have been described, but the gist of the present invention is not limited to two layers, and for example, a three-layer structure as shown in FIG. It is clear that toner adhesion caused by the leak site 7 can be prevented more effectively than in the first embodiment by using the tube 12''.In other words, in this case, the substantial probability of the existence of the leak site 7 is The existence probability is the cube of the existence probability (≪1) of the leak site 7 in , and the probability that toner adhesion will occur is further reduced than in the first embodiment.
【００３２】[0032]
【発明の効果】以上説明した通り本発明によれば成形の
歩留が非常に向上し、且つ、オフセットの発生を大きく
減少させることができる。As explained above, according to the present invention, the molding yield can be greatly improved and the occurrence of offset can be greatly reduced.
【図１】本発明の第１実施例である定着ローラの斜視図
、FIG. 1 is a perspective view of a fixing roller according to a first embodiment of the present invention;
【図２】本発明の背景となる定着装置の断面図である。FIG. 2 is a sectional view of a fixing device that is the background of the present invention.
【図３】図２に示した装置のニップＮ付近の拡大断面図
、FIG. 3 is an enlarged sectional view of the device shown in FIG. 2 near the nip N;
【図４】加圧ローラの成形方法を示す説明図である。FIG. 4 is an explanatory diagram showing a method of forming a pressure roller.
【図５】本発明の定着装置のニップＮ付近の拡大断面図
である。FIG. 5 is an enlarged sectional view of the vicinity of the nip N of the fixing device of the present invention.
【図６】本発明の第２実施例の加圧ローラの斜視図であ
る。FIG. 6 is a perspective view of a pressure roller according to a second embodiment of the present invention.
【図７】本発明の第３実施例の定着ローラ１の斜視図で
ある。FIG. 7 is a perspective view of a fixing roller 1 according to a third embodiment of the present invention.
【図８】本発明の別の実施例の定着装置の断面図である
。FIG. 8 is a sectional view of a fixing device according to another embodiment of the present invention.
１ 定着ローラ ２ 加圧ローラ ３ ヒータ ４ 紙葉体 ５ トナー ６ 電源 ７ リークサイト ８ 金型 ９ ストッパ １０，１０´ 蓋 １１ 芯金 １２ 単層チューブ １２´ ２層チューブ １２″ ３層チューブ ２１ 芯金 ２２ 弾性層 ２３ 単層チューブ ２３´ ２層チューブ 1 Fixing roller 2 Pressure roller 3 Heater 4 Paper leaf 5 Toner 6 Power supply 7 Leak site 8 Mold 9 Stopper 10,10´ Lid 11 Core metal 12 Single layer tube 12´ 2 layer tube 12″ 3 layer tube 21 Core metal 22 Elastic layer 23 Single layer tube 23´ Double layer tube
Claims (8)
送して定着するための定着用ローラにおいて、表面を複
数層のチューブで被覆したことを特徴とする定着用ロー
ラ。1. A fixing roller for nip-conveying and fixing a support material supporting a fixed image, the surface of which is covered with a plurality of layers of tubes.
ることを特徴とする請求項１の定着用ローラ。2. The fixing roller according to claim 1, wherein the plurality of tubes are made of the same material.
質を含有したフッ素樹脂からなることを特徴とする請求
項１もしくは２の定着用ローラ。3. The fixing roller according to claim 1, wherein each of the plurality of tubes is made of a fluororesin containing a low resistance substance.
送して定着するための定着ローラ対と、このローラ対の
少なくとも一方にバイアス電圧を加えるバイアス手段と
、を有する定着装置において、上記定着ローラ対の少な
くとも一方は表面を複数層のチューブで被覆したことを
特徴とする定着装置。4. A fixing device comprising: a pair of fixing rollers for nipping and conveying and fixing a supporting material supporting an unfixed image; and bias means for applying a bias voltage to at least one of the pair of rollers, A fixing device characterized in that at least one of the pair of rollers has a surface covered with a plurality of layers of tube.
ーラは未定着画像と接しているローラであることを特徴
とする請求項４の定着装置。5. The fixing device according to claim 4, wherein the roller covered with the plurality of layers of tubes is a roller that is in contact with an unfixed image.
ーラは未定着画像と接するローラに圧接するローラであ
ることを特徴とする請求項４の定着装置。6. The fixing device according to claim 4, wherein the roller covered with the plurality of layers of tubes is a roller that comes into pressure contact with a roller that is in contact with an unfixed image.
ることを特徴とする請求項４から６の定着装置。7. The fixing device according to claim 4, wherein the plurality of tubes are made of the same material.
質を含有したフッ素樹脂からなることを特徴とする請求
項４から７のの定着装置。8. The fixing device according to claim 4, wherein each of the plurality of tubes is made of a fluororesin containing a low resistance substance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03065830A JP3093303B2 (en) | 1991-03-29 | 1991-03-29 | Fixing roller and fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03065830A JP3093303B2 (en) | 1991-03-29 | 1991-03-29 | Fixing roller and fixing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04301669A true JPH04301669A (en) | 1992-10-26 |
| JP3093303B2 JP3093303B2 (en) | 2000-10-03 |
Family
ID=13298333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03065830A Expired - Fee Related JP3093303B2 (en) | 1991-03-29 | 1991-03-29 | Fixing roller and fixing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3093303B2 (en) |
-
1991
- 1991-03-29 JP JP03065830A patent/JP3093303B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP3093303B2 (en) | 2000-10-03 |
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