JPH11295979A - Developing roller and image forming device provided therewith - Google Patents
Developing roller and image forming device provided therewithInfo
- Publication number
- JPH11295979A JPH11295979A JP9618398A JP9618398A JPH11295979A JP H11295979 A JPH11295979 A JP H11295979A JP 9618398 A JP9618398 A JP 9618398A JP 9618398 A JP9618398 A JP 9618398A JP H11295979 A JPH11295979 A JP H11295979A
- Authority
- JP
- Japan
- Prior art keywords
- roller
- developing roller
- roller surface
- developing
- toner
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 9
- 239000004945 silicone rubber Substances 0.000 claims abstract description 8
- 150000001336 alkenes Chemical class 0.000 claims abstract description 6
- 230000001678 irradiating effect Effects 0.000 claims abstract description 6
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229920002545 silicone oil Polymers 0.000 claims abstract description 5
- 230000000903 blocking effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 238000010894 electron beam technology Methods 0.000 abstract description 10
- 239000002245 particle Substances 0.000 abstract description 10
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 abstract description 6
- 238000000576 coating method Methods 0.000 abstract description 4
- 239000011248 coating agent Substances 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 2
- 238000005507 spraying Methods 0.000 abstract description 2
- 108091008695 photoreceptors Proteins 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 6
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- -1 polysiloxane Polymers 0.000 description 3
- 239000002390 adhesive tape Substances 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229910002012 Aerosil® Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
Landscapes
- Dry Development In Electrophotography (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は電子写真プリンタ、
複写機等に用いられる画像形成装置に係り、特に現像ロ
−ラに関する。The present invention relates to an electrophotographic printer,
The present invention relates to an image forming apparatus used for a copying machine or the like, and particularly to a developing roller.
【０００２】[0002]
【従来の技術】従来、電子写真プリンタ、複写機等に用
いられる画像形成装置には、所定の方向に回転する感光
ドラムの表面を一定の電位、例えば負電位に帯電し、帯
電された感光ドラムの表面に光ヘッドによりほぼ電位０
Ｖの静電潜像を形成し、その静電潜像に負電荷を帯びた
トナ−を現像ロ−ラにより供給し、静電効果を用いて現
像化し、現像トナ−像を正電荷を帯びた印刷媒体に転写
するものがある。2. Description of the Related Art Conventionally, an image forming apparatus used in an electrophotographic printer, a copying machine or the like includes a photosensitive drum rotating in a predetermined direction, which is charged to a constant potential, for example, a negative potential, and the charged photosensitive drum is charged. Potential is almost zero by the optical head on the surface of
A negatively charged toner is supplied to the electrostatic latent image by a developing roller, and the electrostatic latent image is developed using an electrostatic effect. The developed toner image is positively charged. Some are transferred to printed media.
【０００３】現像ロ−ラはロ−ラ表面が所定の粗さに仕
上げられたのち、現像ロ−ラに耐久性を持たせるため
に、紫外線や電子線等の高エネルギ−を有する電磁波を
ロ−ラ面に照射して、ロ−ラ面に細かい凹凸を設けると
ともに固くなるように表面改質を行うことにより長寿命
化を図られている。[0003] After the roller surface is finished to a predetermined roughness, the developing roller applies electromagnetic waves having high energy such as ultraviolet rays and electron beams in order to impart durability to the developing roller. -Longer life is achieved by irradiating the roller surface to provide fine irregularities on the roller surface and performing surface modification so that the roller surface becomes hard.
【０００４】[0004]
【発明が解決しようとする課題】従来の画像形成装置に
あっては、高温高湿環境で印刷を行うと、空気中の水分
子が現像ロ−ラの表面に吸着してロ−ラ表面の電気抵抗
が低下し、電荷のリ−クからトナ−帯電位が低下すると
ともに、水分子がトナ−と摩擦帯電を起こす際にトナ−
から電子を吸引してプラスの電荷を帯びた逆帯電トナ−
を生成するので、トナ−が感光ドラム表面の印刷背景部
にも付着するカブリ現象を発生するという問題点があっ
た。In a conventional image forming apparatus, when printing is performed in a high-temperature and high-humidity environment, water molecules in the air are adsorbed on the surface of the developing roller and the surface of the developing roller is removed. The electric resistance is reduced, the toner charge potential is reduced from the charge leak, and the toner is charged when the water molecules cause triboelectric charging with the toner.
-Charged oppositely charged toner that attracts electrons from
Therefore, there is a problem that the toner causes a fogging phenomenon in which the toner adheres also to a printing background portion on the surface of the photosensitive drum.
【０００５】この原因は、現像ロ−ラのロ−ラ面に紫外
線や電子線等の電磁波を照射した際に、シリコ−ンゴム
が雰囲気中の水分子と反応してシリコ−ンゴムの分子を
構成する基の一部を水酸基と置換し、この水酸基が空気
中の水分子を引き寄せるからである。[0005] This is because when the roller surface of the developing roller is irradiated with an electromagnetic wave such as an ultraviolet ray or an electron beam, the silicone rubber reacts with water molecules in the atmosphere to form the silicone rubber molecules. This is because some of the groups are replaced with hydroxyl groups, and the hydroxyl groups attract water molecules in the air.
【０００６】本発明は空気中の水分子をロ−ラ面に引き
寄せにくい現像ロ−ラ及びその現像ロ−ラを搭載した画
像形成装置を提供することを目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to provide a developing roller which hardly attracts water molecules in the air to a roller surface and an image forming apparatus equipped with the developing roller.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に本発明の現像ロ−ラにおいては、ロ−ラ表面を所定の
荒さに仕上げたのち、ロ−ラ面から水分子を遮断する処
理を施して高エネルギ−を有する電磁波を照射し、ロ−
ラ面に表面改質層を形成する。In order to achieve the above object, a developing roller according to the present invention comprises a step of finishing the surface of the roller to a predetermined roughness and then blocking water molecules from the roller surface. To irradiate electromagnetic waves having high energy,
A surface modification layer is formed on the surface.
【０００８】[0008]
【発明の実施の形態】本発明の実施の形態について図面
を参照しながら説明する。尚、各図面に共通な要素には
同一符号を付す。第１の実施の形態 図２は画像形成装置の概略構造を示す模式図である。矢
印Ａ方向に回転する感光ドラム１の周囲には、それぞれ
矢印方向に回転する帯電ロ−ラ２、現像ロ−ラ３、転写
ロ−ラ４、クリ−ニングロ−ラ５が感光ドラム１の表面
に接触している。帯電ロ−ラ２と現像ロ−ラ３との間に
は、光ヘッド６が配置してある。Embodiments of the present invention will be described with reference to the drawings. Elements common to the drawings are denoted by the same reference numerals. First Embodiment FIG. 2 is a schematic diagram showing a schematic structure of an image forming apparatus. Around the photosensitive drum 1 rotating in the direction of arrow A, a charging roller 2, a developing roller 3, a transfer roller 4, and a cleaning roller 5 rotating in the direction of the arrow are provided on the surface of the photosensitive drum 1. Is in contact with An optical head 6 is arranged between the charging roller 2 and the developing roller 3.
【０００９】帯電ロ−ラ２は感光ドラム１の表面に圧接
し、例えば、負の電圧が印加され、感光ドラム１の表面
を所定電位に帯電する。光ヘッド６は所定電位に帯電さ
れた感光ドラム１の表面に印刷デ−タに基づいて光を照
射し、ほぼ電位０Ｖの静電潜像を形成する。The charging roller 2 is pressed against the surface of the photosensitive drum 1 and applies a negative voltage, for example, to charge the surface of the photosensitive drum 1 to a predetermined potential. The optical head 6 irradiates the surface of the photosensitive drum 1 charged to a predetermined potential with light based on print data, and forms an electrostatic latent image having a potential of almost 0V.
【００１０】現像ロ−ラ３はトナ−搬送ロ−ラ７が搬送
してくるトナ−を現像ブレ−ド８により薄層化し、薄層
化する際に摩擦帯電により感光ドラム１の表面の電荷と
同じ負電荷を帯びたトナ−を感光ドラム１の表面に供給
し、静電効果により静電潜像を現像化する。The developing roller 3 thins the toner conveyed by the toner conveying roller 7 by a developing blade 8 and charges the surface of the photosensitive drum 1 by frictional charging when the toner is thinned. Is supplied to the surface of the photosensitive drum 1 to develop the electrostatic latent image by the electrostatic effect.
【００１１】転写ロ−ラ４は正の電圧が印加され、印刷
媒体９に正電荷を供給し、現像化されたトナ−像を感光
ドラム１の表面から印刷媒体９に転写させる。When a positive voltage is applied to the transfer roller 4, a positive charge is supplied to the print medium 9, and the developed toner image is transferred from the surface of the photosensitive drum 1 to the print medium 9.
【００１２】クリ−ニングロ−ラ５は正の電圧が印加さ
れ、感光ドラム１の表面に残留したトナ−をクリ−ニン
グロ−ラ５に移動させたのち、再度微量ずつ感光ドラム
１に戻され、現像ロ−ラ３に回収される。After a positive voltage is applied to the cleaning roller 5, toner remaining on the surface of the photosensitive drum 1 is moved to the cleaning roller 5, and then the toner is returned to the photosensitive drum 1 by a small amount again. The toner is collected by the developing roller 3.
【００１３】図１は第１の実施の形態による現像ロ−ラ
の外観斜視図である。現像ロ−ラ３は導電性シャフト３
ａに半導電性のシリコ−ンゴムロ−ラ３ｂの弾性層が同
軸に形成され、ロ−ラ面に表面改質層３ｃを有する。FIG. 1 is an external perspective view of a developing roller according to the first embodiment. The developing roller 3 is a conductive shaft 3
An elastic layer of a semiconductive silicone rubber roller 3b is formed coaxially on a, and has a surface modified layer 3c on the roller surface.
【００１４】シリコ−ンゴムロ−ラ３ｂには以下の材料
を用い、導電性シャフト３ａに成形して現像ロ−ラ３を
得る。先ず、ジメチルシロキサン９９．８５モル％とメ
チルビニルシロキサン０．１５モル％とからなる平均重
合度が凡そ８０００のポリシロキサンと、処理シリカＲ
−９７２（日本アエロジル社の商標）と、球状シリコ−
ンエラストマ−粒子（シリコ−ンパウダ−）ＫＭＰ５９
４（信越化学工業社の商標）とをそれぞれ１００部、２
０部、１３０部の割合で配合し、さらにアセチレンブラ
ックを１３部添加して混練する。The following materials are used for the silicone rubber roller 3b, and are molded into the conductive shaft 3a to obtain the developing roller 3. First, a polysiloxane having an average degree of polymerization of about 8000, comprising 99.85 mol% of dimethylsiloxane and 0.15 mol% of methylvinylsiloxane, and treated silica R
972 (trademark of Aerosil Japan) and spherical silicone
Elastomer particles (silicone powder) KMP59
4 (trademark of Shin-Etsu Chemical Co., Ltd.)
0 parts and 130 parts are blended, and 13 parts of acetylene black is further added and kneaded.
【００１５】さらに2,5-ジメチル-2,5（ｔ−ブチルパ−
オキサイド）ヘキサンを１．６部混練して得られたコン
パウンドを導電性シャフト３ａとともに成形金型に収納
し、温度１７０℃、時間１５分、圧力３０Ｋｇ／ の成
形条件で成形し、乾燥機で温度２００℃で２時間加熱す
る。Further, 2,5-dimethyl-2,5 (t-butyl par-
The compound obtained by kneading 1.6 parts of (oxide) hexane was housed in a molding die together with the conductive shaft 3a, molded at a temperature of 170 ° C., for 15 minutes, at a pressure of 30 kg / m 2, and dried by a dryer. Heat at 200 ° C. for 2 hours.
【００１６】こうして得られたシリコ−ンゴムロ−ラ３
ｂのロ−ラ面を円筒研磨機で所定の直径に、且つロ−ラ
表面が所定の粗さ、例えば、Ｒｚ（１０点平均粗さ）で
６〜１２μｍに仕上げられて現像ロ−ラ３を得る。The silicone rubber roller 3 thus obtained
The roller surface b is finished to a predetermined diameter by a cylindrical grinder and the surface of the roller is finished to a predetermined roughness, for example, 6 to 12 μm by Rz (10-point average roughness), and the developing roller 3 is finished. Get.
【００１７】次に、現像ロ−ラ３のロ−ラ面にトルエン
で１／１０に希釈したシリコ−ンオイル、あるいはオレ
フィンオイルをスプレ−で塗布する。この場合感光ドラ
ム１への汚染防止のために、塗布量を０．１ｇ〜０．５
ｇ程度が望ましい。Next, a silicone oil or olefin oil diluted 1/10 with toluene is applied to the roller surface of the developing roller 3 by spraying. In this case, in order to prevent the photosensitive drum 1 from being contaminated, the coating amount is 0.1 g to 0.5 g.
g is desirable.
【００１８】オイルを塗布した後、ロ−ラ面に紫外線や
電子線等の高エネルギ−粒子を照射して、図３に示すよ
うに、ロ−ラ面に細かい凹凸を設けるとともに固くなる
ように表面改質を行う。図３で波形の大きい凹凸は研磨
面であり、小さい凹凸が高エネルギ−粒子照射によるも
のである。After applying the oil, the roller surface is irradiated with high energy particles such as ultraviolet rays or electron beams so that the roller surface is provided with fine irregularities and hardened as shown in FIG. Perform surface modification. In FIG. 3, the irregularities having large waveforms are polished surfaces, and the small irregularities are due to high energy particle irradiation.
【００１９】図４は高温高湿環境下で実験した第１の実
施の形態によるカブリ現象の割合を示す説明図である。
カブリの測定方法は、図２に示した画像形成装置にオイ
ル塗布処理無しの現像ロ−ラを装着し、印刷時と同じ条
件で所定回数回転駆動させる。但し、静電潜像は形成さ
せない。次に感光ドラム表面に粘着テ−プ、例えば市販
のスコッチテ−プを貼付して剥がし、白紙に貼付する。
この際、比較するために感光ドラム表面に貼付しない粘
着テ−プも貼付する。次に両テ−プに光を照射し、色彩
色差計ＣＲ−２００（ミノルタ社製）を用いて反射率を
測定し、反射率の差をカブリとする。FIG. 4 is an explanatory diagram showing the rate of fogging according to the first embodiment, which was tested in a high-temperature, high-humidity environment.
In the fog measurement method, a developing roller without oil application processing is mounted on the image forming apparatus shown in FIG. 2, and the image forming apparatus is rotated a predetermined number of times under the same conditions as during printing. However, no electrostatic latent image is formed. Next, an adhesive tape, for example, a commercially available scotch tape, is attached to the surface of the photosensitive drum, peeled off, and attached to a white paper.
At this time, an adhesive tape that is not attached to the surface of the photosensitive drum is also attached for comparison. Next, both tapes are irradiated with light, the reflectance is measured using a colorimeter CR-200 (manufactured by Minolta), and the difference between the reflectances is defined as fog.
【００２０】次にオイル塗布処理有りの現像ロ−ラを装
着し、同様にして反射率の差を求める。このようにして
求めた結果が図４に示す高温高湿カブリである。Next, a developing roller having an oil coating process is mounted, and the difference in reflectance is determined in the same manner. The result obtained in this way is the high-temperature and high-humidity fog shown in FIG.
【００２１】Ｎｏ１はオイル塗布処理無しの場合であり
高温高湿カブリ３５〜４０％、Ｎｏ２及びＮｏ３はそれ
ぞれシリコ−ンオイル、オレフィンオイルを塗布した場
合で共に高温高湿カブリ５〜１０％である。カブリが大
幅に減少していることは、テ−プにトナ−が付着してい
ず、感光ドラム表面へのトナ−のカブリ現象が大幅に減
少していることを示している。No. 1 is a case where no oil coating treatment is performed, that is, 35 to 40% of high-temperature and high-humidity fog. Significant reduction in fog indicates that toner is not attached to the tape, and the fogging phenomenon of toner on the surface of the photosensitive drum is greatly reduced.
【００２２】この理由は、現像ロ−ラ３のロ−ラ面にシ
リコ−ンオイル、またはオレフィンオイルを塗布してロ
−ラ面と水分子とを遮断したのち、ロ−ラ面に紫外線や
電子線等の高エネルギ−粒子を照射するようにしたこと
により、空気中の水分子をロ−ラ面に引き付ける水酸基
が生成されず、空気中の水分子がロ−ラ面に引き寄せら
れないので、ロ−ラ面のトナ−帯電位が維持されるとと
もに、プラスの電荷を帯びた逆帯電トナ−が生成されな
いからである。The reason is that a silicone oil or an olefin oil is applied to the roller surface of the developing roller 3 to block the roller surface from water molecules, and then the ultraviolet or electron beam is applied to the roller surface. By irradiating high-energy particles such as lines, hydroxyl groups that attract water molecules in the air to the roller surface are not generated, and water molecules in the air are not attracted to the roller surface. This is because the toner charged position on the roller surface is maintained, and no positively charged oppositely charged toner is generated.
【００２３】第１の実施の形態によれば、現像ロ−ラの
ロ−ラ面にシリコ−ンオイル、またはオレフィンオイル
を塗布してロ−ラ面と水分子とを遮断したのち、ロ−ラ
面に紫外線や電子線等の高エネルギ−粒子を照射するよ
うにしたので、ロ−ラ面に水酸基が生成されず、空気中
の水分子がロ−ラ面に引き寄せられないので、トナ−が
感光ドラム表面の印刷背景部に付着するカブリ現象が大
幅に減少する。According to the first embodiment, a silicone oil or an olefin oil is applied to the roller surface of the developing roller to block the roller surface from water molecules, and then the roller is applied. Since the surface is irradiated with high energy particles such as ultraviolet rays and electron beams, hydroxyl groups are not generated on the roller surface, and water molecules in the air are not attracted to the roller surface. The fog phenomenon attached to the printing background portion on the surface of the photosensitive drum is greatly reduced.
【００２４】第２の実施の形態 第１の実施の形態では現像ロ−ラのロ−ラ面にシリコ−
ンオイル、またはオレフィンオイルを塗布してロ−ラ面
と水分子とを遮断したのち、ロ−ラ面に紫外線や電子線
等の高エネルギ−粒子を照射するようにしたが、第２の
実施の形態はオイル塗布する代わりに、現像ロ−ラを１
５０℃〜１８０℃で５時間加熱し、シリコ−ンゴムロ−
ラ３ｂに含まれる低分子量成分（重合度２０以下）をロ
−ラ表面にしみださせ、ロ−ラ面が低分子量成分で覆わ
られたのち、紫外線や電子線等の高エネルギ−粒子を照
射する。 Second Embodiment In the first embodiment, a silicon roller is provided on the roller surface of the developing roller.
After applying roller oil or olefin oil to block the roller surface from water molecules, the roller surface is irradiated with high energy particles such as ultraviolet rays and electron beams. Instead of applying oil, use a developing roller with 1
Heat at 50 ° C to 180 ° C for 5 hours.
The low molecular weight component (degree of polymerization: 20 or less) contained in the rubber 3b is exuded onto the roller surface, and after the roller surface is covered with the low molecular weight component, it is irradiated with high energy particles such as ultraviolet rays and electron beams. I do.
【００２５】図５は高温高湿環境下で実験した第２の実
施の形態によるカブリ現象の割合を示す説明図であり、
カブリ現象の割合の求め方は第１の実施の形態と同様で
ある。Ｎｏ１は加熱無しで高温高湿カブリ３５〜４０
％、Ｎｏ２は加熱温度１５０℃で加熱した場合で高温高
湿カブリ３５〜４０％、Ｎｏ３は加熱温度１８０℃で加
熱した場合で高温高湿カブリ５〜１０％である。FIG. 5 is an explanatory diagram showing the rate of fog phenomenon according to the second embodiment, which was tested in a high-temperature, high-humidity environment.
The method of calculating the ratio of the fogging phenomenon is the same as in the first embodiment. No1 is high temperature and high humidity fog 35-40 without heating
%, No. 2 is a high-temperature and high-humidity fog of 35 to 40% when heated at a heating temperature of 150 ° C., and No. 3 is a high-temperature and high-humidity fog of 5 to 10% when heated at a heating temperature of 180 ° C.
【００２６】この理由は、現像ロ−ラ３のロ−ラ面が低
分子量成分で覆わられたのち、紫外線や電子線等の高エ
ネルギ−粒子を照射するようにしたことにより、空気中
の水分子をロ−ラ面に引き付ける水酸基が生成されず、
空気中の水分子がロ−ラ面に引き寄せられないので、ロ
−ラ面のトナ−帯電位が維持されるとともに、プラスの
電荷を帯びた逆帯電トナ−が生成されないからである。The reason for this is that after the roller surface of the developing roller 3 is covered with a low molecular weight component, it is irradiated with high energy particles such as ultraviolet rays and electron beams, so that water in the air No hydroxyl groups are generated to attract molecules to the roller surface,
This is because the water molecules in the air are not attracted to the roller surface, so that the toner charged position on the roller surface is maintained and no positively charged oppositely charged toner is generated.
【００２７】第２の実施の形態によれば、現像ロ−ラ３
のロ−ラ面が低分子量成分で覆わられたのち、紫外線や
電子線等の高エネルギ−粒子を照射するようにしたの
で、空気中の水分子をロ−ラ面に引き付ける水酸基が生
成されず、空気中の水分子がロ−ラ面に引き寄せられな
いので、トナ−が感光ドラム表面の印刷背景部に付着す
るカブリ現象が大幅に減少する。According to the second embodiment, the developing roller 3
After the roller surface is covered with a low molecular weight component, it is irradiated with high energy particles such as ultraviolet rays and electron beams, so that hydroxyl groups that attract water molecules in the air to the roller surface are not generated. Since the water molecules in the air are not attracted to the roller surface, the fogging phenomenon that the toner adheres to the printing background portion on the photosensitive drum surface is greatly reduced.
【００２８】[0028]
【発明の効果】本発明は、以上説明したように構成され
ているので以下に記載される効果を奏する。ロ−ラ表面
を所定の荒さに仕上げたのち、ロ−ラ面から水分子を遮
断する処理を施して高エネルギ−を有する電磁波を照射
し、ロ−ラ面に表面改質層を形成したことにより、高温
高湿環境で印刷を行っても、空気中の水分子が現像ロ−
ラのロ−ラ面に引き寄せられないので、ロ−ラ面のトナ
−帯電位が維持されるとともに、プラスの電荷を帯びた
逆帯電トナ−の生成されないので、トナ−が感光ドラム
表面の印刷背景部に付着するカブリ現象を防止できる。Since the present invention is configured as described above, it has the following effects. After finishing the surface of the roller to a predetermined roughness, a treatment for blocking water molecules from the roller surface and irradiating electromagnetic waves having high energy to form a surface modified layer on the roller surface. Therefore, even when printing is performed in a high-temperature and high-humidity environment, water molecules in the air are developed by the developing process.
The toner is not attracted to the roller surface of the roller, so that the toner charged position on the roller surface is maintained, and no oppositely charged toner having a positive charge is generated, so that the toner is printed on the surface of the photosensitive drum. The fogging phenomenon attached to the background can be prevented.
【図１】第１の実施の形態による現像ロ−ラの外観斜視
図である。FIG. 1 is an external perspective view of a developing roller according to a first embodiment.
【図２】画像形成装置の概略構造を示す模式図である。FIG. 2 is a schematic diagram illustrating a schematic structure of an image forming apparatus.
【図３】表面改質された現像ロ−ラ面の拡大図である。FIG. 3 is an enlarged view of a developing roller surface whose surface has been modified.
【図４】第１の実施の形態によるカブリ現象の割合を示
す説明図である。FIG. 4 is an explanatory diagram showing a ratio of a fog phenomenon according to the first embodiment.
【図５】第２の実施の形態によるカブリ現象の割合を示
す説明図である。FIG. 5 is an explanatory diagram showing a ratio of a fog phenomenon according to the second embodiment.
３ 現像ロ−ラ ３ｃ 表面改質層 3 Developing roller 3c Surface modified layer
───────────────────────────────────────────────────── フロントページの続き (72)発明者 礒田 雅夫 東京都港区芝浦４丁目11番地22号 株式会 社沖データ内 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Masao Isoda 4-11-11 Shibaura, Minato-ku, Tokyo Inside Oki Data Corporation
Claims (4)
ゴムの弾性層を同心に形成した現像ロ−ラにおいて、 ロ−ラ表面を所定の荒さに仕上げたのち、ロ−ラ面から
水分子を遮断する処理を施して高エネルギ−を有する電
磁波を照射し、ロ−ラ面に表面改質層を形成したことを
特徴とする現像ロ−ラ。1. A developing roller in which a conductive shaft is provided with a semiconductive silicone rubber elastic layer concentrically, and after the roller surface is finished to a predetermined roughness, water molecules are removed from the roller surface. A developing roller having a surface modified layer formed on a roller surface by irradiating a high-energy electromagnetic wave by performing a treatment for blocking the surface of the developing roller.
コ−ンオイル、またはオレフィンオイルを塗布した請求
項１記載の現像ロ−ラ。2. The developing roller according to claim 1, wherein said blocking treatment comprises applying a silicone oil or an olefin oil to the surface of the developing roller.
１８０℃で加熱してシリコ−ンゴムロ−ラに含まれる低
分子量成分をロ−ラ表面にしみださせ、ロ−ラ面を低分
子量成分で覆うようにした請求項１記載の現像ロ−ラ。3. The shut-off process is carried out at a temperature of 150.degree.
2. The developing roller according to claim 1, wherein the low molecular weight component contained in the silicone rubber roller is heated to 180.degree. C. to exude to the roller surface, and the roller surface is covered with the low molecular weight component.
ドラムにトナ−を供給して現像化する現像ロ−ラを備え
た画像形成装置において、 上記現像ロ−ラに請求項２記載、又は請求項３記載の現
像ロ−ラを搭載することを特徴とした画像形成装置。4. An image forming apparatus comprising a developing roller for supplying toner to a photosensitive drum having an electrostatic latent image formed on the surface of the drum and developing the photosensitive drum, wherein the developing roller is provided. An image forming apparatus comprising the developing roller according to claim 3 mounted thereon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9618398A JP3133029B2 (en) | 1998-04-08 | 1998-04-08 | Developing roller and image forming apparatus equipped with the developing roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9618398A JP3133029B2 (en) | 1998-04-08 | 1998-04-08 | Developing roller and image forming apparatus equipped with the developing roller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11295979A true JPH11295979A (en) | 1999-10-29 |
| JP3133029B2 JP3133029B2 (en) | 2001-02-05 |
Family
ID=14158212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9618398A Expired - Fee Related JP3133029B2 (en) | 1998-04-08 | 1998-04-08 | Developing roller and image forming apparatus equipped with the developing roller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3133029B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7190926B2 (en) | 2004-04-07 | 2007-03-13 | Oki Data Corporation | Developer bearing body and image forming apparatus |
| JP2007212842A (en) * | 2006-02-10 | 2007-08-23 | Tokai Rubber Ind Ltd | Developing roll and its production method |
-
1998
- 1998-04-08 JP JP9618398A patent/JP3133029B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7190926B2 (en) | 2004-04-07 | 2007-03-13 | Oki Data Corporation | Developer bearing body and image forming apparatus |
| JP2007212842A (en) * | 2006-02-10 | 2007-08-23 | Tokai Rubber Ind Ltd | Developing roll and its production method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3133029B2 (en) | 2001-02-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0522813B1 (en) | Electrophotographic recording apparatus | |
| JP2542373B2 (en) | Toner carrier | |
| CN100474138C (en) | Method for forming composite color image | |
| JPH08292640A (en) | Rubber roll, rubber composition, and image forming apparatus | |
| JPH04268583A (en) | charging device | |
| CN101140433A (en) | Carrier for electrostatic image development, developer, developer cartridge, process cartridge, and image forming apparatus | |
| KR20020040616A (en) | Image carrier and apparatus and method for recording image using image carrier | |
| EP0354310A1 (en) | Method and apparatus for electrophotographic printing | |
| JPH01219881A (en) | Cleaning method and device | |
| JPH0799442B2 (en) | Contact charging device | |
| JP3133029B2 (en) | Developing roller and image forming apparatus equipped with the developing roller | |
| JPH1173006A (en) | Semiconductive roll and developing device using thereof | |
| JP3966578B2 (en) | Semiconductive roll and developing device | |
| JP4445146B2 (en) | Electrostatic latent image liquid developing device | |
| JPH09197801A (en) | Conductive silicon based rubber roll | |
| JP3016600B2 (en) | Electrostatic recording device | |
| JPH10104868A (en) | Electrophotographic developer and image forming method | |
| JP3690051B2 (en) | Electrophotographic developer carrier, electrophotographic developer, and image forming apparatus | |
| JP2000258990A (en) | Electrophotographic developing device | |
| JPS5818B2 (en) | Image holding member | |
| JPH1031360A (en) | Image forming device | |
| JPH06301234A (en) | Nonmagnetic one-component developer and nonmagnetic one-component developing device | |
| JP2000284585A (en) | Electrophotographic recording roller | |
| JPH0915964A (en) | Developing unit | |
| JPH0331882A (en) | Liquid developing system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20001107 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081124 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081124 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091124 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091124 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101124 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101124 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111124 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111124 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121124 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121124 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131124 Year of fee payment: 13 |
|
| LAPS | Cancellation because of no payment of annual fees |