JPS6015068B2 - Developer triboelectric charging device - Google Patents
Developer triboelectric charging deviceInfo
- Publication number
- JPS6015068B2 JPS6015068B2 JP1592677A JP1592677A JPS6015068B2 JP S6015068 B2 JPS6015068 B2 JP S6015068B2 JP 1592677 A JP1592677 A JP 1592677A JP 1592677 A JP1592677 A JP 1592677A JP S6015068 B2 JPS6015068 B2 JP S6015068B2
- Authority
- JP
- Japan
- Prior art keywords
- developer
- developing roller
- circumferential surface
- charging member
- triboelectric charging
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Dry Development In Electrophotography (AREA)
Description
【発明の詳細な説明】
この発明は、1成分系の現像剤を用いる静露潜像現像方
式において、現像ローラーの間面に保持され、現像部へ
搬送される現像剤を、現像すべき静電潜像と逆極性に帯
電させるための装置に関する。DETAILED DESCRIPTION OF THE INVENTION In a static exposure latent image development method using a one-component developer, the developer held between the developing rollers and conveyed to the developing section is The present invention relates to a device for charging to a polarity opposite to that of a latent image.
1成分系の現像剤を現像ローラーの間面に保持し、現像
ローラーの回動により搬送しつつ、静電溶像と逆樋性に
摩擦帯電させて、上記静電潜像の現像に供する現像方式
が知られている。A developer in which a one-component developer is held between the developing rollers and transported by the rotation of the developing rollers, and frictionally charged in a reverse gutter manner with the electrostatic solution to develop the electrostatic latent image. The method is known.
今、第1図および第2図を参照して、この現像方式の概
略およびその問題点を述べる。An outline of this developing method and its problems will now be described with reference to FIGS. 1 and 2.
第1図において、現像ローラー1は、金属性のシリンダ
ー11の周面を、導電性ゴム層12で被覆してなり、軸
13のまわりに矢印方向へ回動可能であるように設けら
れている。In FIG. 1, the developing roller 1 is formed by covering the circumferential surface of a metal cylinder 11 with a conductive rubber layer 12, and is provided so as to be rotatable around a shaft 13 in the direction of the arrow. .
この現像ローラー1の上位には、現像剤Dを貯えたホツ
パー2が設けられている。A hopper 2 in which developer D is stored is provided above the developing roller 1.
ホッパー2の下部は、現像剤補給用の関口部となってお
り、この関口部は、現像ローラー1の上部周面に、あた
かも、この周面部を以て、ホッパー2の底部とするかの
ように近接している。The lower part of the hopper 2 is a gate for replenishing the developer. are doing.
現像剤Dは、粉体であって、非磁性トナーのみで構成さ
れた1成分系である。現像剤Dは、ホッパー2の開口部
から、現像ローラ−1の周面に供給されると、導電性ゴ
ム層12の表面の微視的な凹凸、表面エネルギーによる
付着力、トナー同志の付着力などにより、一部が上記周
面上に保持される。The developer D is a powder and is a one-component system composed only of non-magnetic toner. When the developer D is supplied from the opening of the hopper 2 to the circumferential surface of the developing roller 1, it is affected by microscopic irregularities on the surface of the conductive rubber layer 12, adhesion force due to surface energy, and adhesion force between toner particles. A portion thereof is held on the circumferential surface by, for example, the following.
そこで、現像ローフーーを矢印方向へ回動させれば、上
言己周面に保持された現像剤Dは、上記周面とともに移
動することにより搬送され、現像ローラー1が1回転す
れば、現像剤Dは、現像ローラー1の周面上を層状に覆
う。現像ローラー1の周面上に保持される現像剤層の層
厚は、ホツパー2の開口部をなす、側板端部、特に、現
像剤Dを送り出す側の側板機縁と現像ローラー1の周面
との間隙の大きさにより規制される。Therefore, when the developing roller 1 is rotated in the direction of the arrow, the developer D held on its circumferential surface is transported by moving together with the circumferential surface, and when the developing roller 1 rotates once, the developer D is D covers the circumferential surface of the developing roller 1 in a layered manner. The thickness of the developer layer held on the circumferential surface of the developing roller 1 is determined by the thickness of the side plate edge forming the opening of the hopper 2, especially the edge of the side plate on the side from which the developer D is sent out, and the circumferential surface of the developing roller 1. It is regulated by the size of the gap.
すなわち、側板21の下方端緑と現像ローラーーの周面
との間隙の大きさが一定に保たれることにより、上記層
厚は一定の大きさに保たれるのである。側板21の下方
機縁はまた、該例においては、現像剤Dを、静電潜像と
逆犠牲に摩擦帯電させる機能を付与されている。That is, by keeping the gap between the lower end of the side plate 21 and the circumferential surface of the developing roller constant, the layer thickness can be kept constant. In this example, the lower edge of the side plate 21 is also provided with a function of triboelectrically charging the developer D inversely to the electrostatic latent image.
即ち、側板21の少くとも下方端縁近傍の部分は、現像
剤Dを、静電潜像と逆犠牲に摩擦帯電させうるような材
質で形成されているのである。従って、現像ローラー1
の周面に保持された現像剤層の、少くとも層表面部のト
ナーは、帯電している。That is, at least the portion near the lower edge of the side plate 21 is formed of a material that can triboelectrically charge the developer D in a manner opposite to the electrostatic latent image. Therefore, the developing roller 1
The toner on at least the surface portion of the developer layer held on the peripheral surface of the developer layer is electrically charged.
ところで、現像ローラー1には、静亀潜像と同極性の電
位が印放されて、現像部に、現像用バイアス電圧が生ず
るようになっている。Incidentally, a potential having the same polarity as the static latent image is applied to the developing roller 1, so that a developing bias voltage is generated in the developing section.
現像すべき静電港像を形成された潜像担持体3は、矢印
方法へ搬送され、現像部においては、静雷潜像を形成さ
れた側の面が、現像ローラー1の周面の現像剤層の表面
に、騒く近接するかあるいは軽く当接し、そのさし、ト
ナ−の電荷と静電潜像との電気的相互作用により現像が
行なわれ、潜像担持体3上に、粉体の可視像V.1が形
成されるのである。The latent image carrier 3 on which the electrostatic latent image to be developed is formed is conveyed in the direction of the arrow, and in the developing section, the surface on which the electrostatic latent image is formed is exposed to the developing surface of the developing roller 1. The surface of the toner layer is brought into close proximity or lightly abutted, and development is performed by electrical interaction between the charge of the toner and the electrostatic latent image, and powder is deposited on the latent image carrier 3. Visible image of the bodyV. 1 is formed.
さて、このような現像方式で重要なことは、現像ローラ
ー1の周面に、現像剤Dを均一に、且つなるべく小さい
層厚で保持させることである。Now, what is important in such a developing method is to hold the developer D uniformly and in a layer thickness as small as possible on the circumferential surface of the developing roller 1.
すなわち、現像剤Dを現像ローラー1の周面に保つ力は
、上記したように、現像ローラー1の導電性ゴム層12
の表面の微視的凹凸によるトラップ力、表面エネルギー
による付着力、トナー粒子同志の付着力、現像ローラー
1と帯電トナーとの電気的引力等であり、これらは総合
しても、さほど大きな力とはならず、現像ローラーーの
周面上の現像剤層の層厚が大きくなると、現像剤Dの保
持性が悪くなり、現像剤Dは現像ローラー1から分離し
やすくなり、地汚れが生じやすくなり、現像剤Dの補給
性も悪くなるのである。また、現像剤Dの層が均一でな
ければ、現像された可視像V.1において濃度むらが発
生するのある。ところで、第1図に示すごとき装置にお
いて、現像ローラー1の周面に、非常に薄くて均一な現
像剤層を形成するためには、ホッパー2の側板21の下
方端縁と、現像ローラー1の周面との間隙の大きさを、
極めて小さくし、且つ、上詫間隙の大きさを、現像ロー
ラー1の鞠方向にわたって一様に保たねばならず、これ
は技術的に極めて困難であり、上記端縁と現像ローラー
1の周面とが接触したりすることがあり、上記周面が損
傷するなどという欠点があった。That is, as described above, the force that keeps the developer D on the circumferential surface of the developing roller 1 is
These forces include the trapping force due to microscopic irregularities on the surface, the adhesion force due to surface energy, the adhesion force between toner particles, and the electrical attraction between the developing roller 1 and the charged toner, and these forces are not very large when taken together. However, if the thickness of the developer layer on the circumferential surface of the developing roller becomes large, the retention of the developer D will deteriorate, and the developer D will easily separate from the developing roller 1, making it more likely that background stains will occur. , replenishment of the developer D also deteriorates. Also, if the layer of developer D is not uniform, the developed visible image V. 1, density unevenness may occur. By the way, in the apparatus shown in FIG. 1, in order to form a very thin and uniform developer layer on the circumferential surface of the developing roller 1, it is necessary to The size of the gap with the surrounding surface,
It is necessary to keep the size of the upper vertical gap extremely small and uniform across the circumferential direction of the developing roller 1, which is technically extremely difficult. There was a drawback that the above-mentioned peripheral surface was damaged due to contact between the two.
そこで、このような欠点を除去する目的で、第2図に示
すごとき現像剤摩擦帯電装置が提案された。Therefore, in order to eliminate such drawbacks, a developer triboelectric charging device as shown in FIG. 2 was proposed.
すなわち、該装置の主要部は、摩擦帯電部材4と圧縮性
のばね5とにより構成されている。That is, the main part of the device is composed of a frictional charging member 4 and a compressible spring 5.
摩擦帯電部材4は、図面に垂直な方向へ細長い板であっ
て、その長さ方向に沿う一方の側綾部は、図に示すよう
に、滑らかに丸められている。摩擦帯電部材4の、長さ
方向に沿う他方の側縁部には、圧縮性のばね5の一端が
固定され、ばね5の他端は、不動部材6に当綾している
。しかして、摩擦帯電部材4は、上記滑らかに丸められ
た側の側綾部を、現像ローラーーの上部の周面に当接さ
せ、図示されない保持手段により、図に示す如き態位に
維持される。すると、上記滑らかに丸められた側縁部は
、ばね5の弾発力により現像ローラーーの周面に長さ方
向にわたって圧接する。現像剤Dは、摩擦帯電部材卑と
現像ローラー1の圧藤部上位に適宜供給される。現像ロ
ーラー1が矢印方向へ回動すると、現像剤Dは、摩擦帯
電部材4により摩擦帯電されつつ、現像ローラー1の周
面とともに移動し、上記局面上に層を形成する。The frictional charging member 4 is an elongated plate in the direction perpendicular to the drawing, and one side twill along its length is smoothly rounded as shown in the drawing. One end of a compressible spring 5 is fixed to the other longitudinal side edge of the frictional charging member 4, and the other end of the spring 5 is in contact with the immovable member 6. The frictional charging member 4 is maintained in the position shown in the figure by a holding means (not shown) with the smoothly rounded side twill abutting against the upper circumferential surface of the developing roller. Then, the smoothly rounded side edges come into pressure contact with the circumferential surface of the developing roller in the length direction due to the elastic force of the spring 5. The developer D is appropriately supplied to the base of the triboelectric charging member and the upper part of the pressing portion of the developing roller 1. When the developing roller 1 rotates in the direction of the arrow, the developer D moves along with the circumferential surface of the developing roller 1 while being triboelectrically charged by the triboelectrically charging member 4 to form a layer on the curved surface.
この厚さは、摩擦帯電部材4の、現像ローラー1への圧
薮の強さ、即ち、ばね6の弾発力により規制される。し
かし、この装置の場合、次の如き問題点が存する。This thickness is regulated by the strength of the pressure applied by the frictional charging member 4 to the developing roller 1, that is, by the elastic force of the spring 6. However, this device has the following problems.
すなわち、現象剤Dは、摩擦帯電部材4の側縁部が滑ら
かに丸められているため、上記側綾部と現像ローラー周
面との閥を通過しやすく、ともすれば、現像ローラー1
の周面上に保持される現像剤層の層厚が大きくなり勝ち
なのである。そこで、この層厚を小さくおさえようとす
ると、摩擦帯電部材4の、現像ローラー1への圧髪力を
大きくしなければならない。しかるに上記圧薮力を大き
くすると、現像剤Dが、現像ローフー1の周面上で凝集
したり固化したりしやすくなる。現像剤Dが凝集したり
固化したりすると、現像機能が著しく損なわれ、可視像
の藤質が低下するのである。現像剤Dの、凝集、固化が
生ずるのは、摩擦帯電4の側縁部の曲率により、現像ロ
ーラー1の周面とともに移動する現像剤が、進行に伴い
、連続的に圧縮されるためである。That is, since the side edges of the frictional charging member 4 are smoothly rounded, the developing agent D easily passes through the gap between the side twill portion and the circumferential surface of the developing roller.
The thickness of the developer layer held on the circumferential surface of the developer tends to be large. Therefore, in order to keep this layer thickness small, it is necessary to increase the pressing force of the frictional charging member 4 on the developing roller 1. However, when the pressing force is increased, the developer D tends to aggregate or solidify on the circumferential surface of the development loaf 1. If the developer D aggregates or solidifies, the developing function will be significantly impaired and the quality of the visible image will deteriorate. The aggregation and solidification of the developer D occur because the developer moving along with the circumferential surface of the developing roller 1 is continuously compressed as it advances due to the curvature of the side edge of the triboelectric charger 4. .
本発明の目的は、上記の如き不都合を除去すべく、現像
剤摩擦帯電装置を改良することである。SUMMARY OF THE INVENTION An object of the present invention is to improve a developer triboelectric charging device in order to eliminate the above-mentioned disadvantages.
以下、図示の実施例に別して、本発明を説明する。ただ
し、繁雑をさげるため、混同のおそれのないものについ
ては、第3図以下においても、第1図、第2図における
と同一の符号を用いる。第3図は、本発明の一実施例を
略図的に示している。本発明による現像剤摩擦帯電装置
は、摩擦帯電部材7および圧縮性のばね8および図示さ
れていないが摩擦帯電部材7の配設態位を維持するため
の手段とにより構成されている。EMBODIMENT OF THE INVENTION Hereinafter, the present invention will be explained separately with reference to illustrated embodiments. However, in order to reduce complexity, the same reference numerals as in FIGS. 1 and 2 are used in FIGS. 3 and below for items that are unlikely to be confused. FIG. 3 schematically shows an embodiment of the invention. The developer tribo-charging device according to the present invention is comprised of a tribo-charging member 7, a compressible spring 8, and means (not shown) for maintaining the disposed position of the tribo-charging member 7.
即ち、構成上は本発明による現像剤摩擦帯電と、第2図
に示す摩擦帯電装置とは、殆ど同じである。本発明の特
徴とする所は、摩擦帯電部材7の形状ならびに、その配
設態位に存する。すなわち、摩擦帯電部材7は、第3図
で図面に垂直な方向を長手方向とし、上記長さ方向に沿
う直線状の端緑部を有する板であるが、上記直線状の端
綾部は、第4図に示すように、基面71と斜面72とに
より先端が0.釈以下の尖緑に形成されている。That is, in terms of construction, the developer frictional charging device according to the present invention and the frictional charging device shown in FIG. 2 are almost the same. The characteristics of the present invention reside in the shape of the frictional charging member 7 and its arrangement. That is, the frictional charging member 7 is a plate whose longitudinal direction is the direction perpendicular to the drawing in FIG. As shown in FIG. 4, the base surface 71 and the slope 72 make the tip end 0. It is formed into a green leaf below the peak.
基面71と斜面72とのなす角を8,とする。摩擦帯電
部材7は、これを、現像剤Dをして、現像すべき静電港
像と逆樋性に摩擦帯電させうる材質により形成しても良
いし、又は任意の硬質材料を図の如く形成し、その尖綾
部を上記材質で被覆して用いても良い。The angle between the base surface 71 and the slope 72 is assumed to be 8. The frictional charging member 7 may be formed of a material that can be frictionally charged with the developer D to reverse the electrostatic port image to be developed, or may be formed of any hard material as shown in the figure. It may also be used by forming a ring and covering the pointed portion with the above-mentioned material.
尖綾部のまるみを、0〜0.波までの間のどの値にする
かは、ローラーとトナ−、トナーとブレード材料の相互
間の摩擦係数、プレード圧力によって決定される。摩擦
帯電部村7は、その尖緑が、現像ローフー1の周面に、
現像ローラー1の軸万向にわたって当接するように、且
つ、現像ローラー1の回動に逆らうように配設されてい
る。Adjust the roundness of the cusps from 0 to 0. The value of the wave length is determined by the coefficient of friction between the roller and toner, the toner and blade material, and the blade pressure. The frictional charging part 7 has its pointed green surface on the circumferential surface of the developing roller 1.
It is disposed so as to be in contact with the developing roller 1 in all directions of its axis, and to oppose the rotation of the developing roller 1 .
このとき、摩擦帯電部材7の基面71が、移動する現像
剤Dを迎える側に向くようにする。今、現像ローラー1
の周面に、垂直に交わる面を法面と呼び、摩擦帯電部村
7の尖線と上記周面との当後部において立てた法面を第
3図に符号nで示す。At this time, the base surface 71 of the frictional charging member 7 is made to face the side that receives the moving developer D. Now, developing roller 1
A surface that perpendicularly intersects with the circumferential surface is called a slope, and the slope erected at the rear of the point line of the friction charging section 7 and the circumferential surface is indicated by the symbol n in FIG.
すると、摩擦帯電部材7の配設態位が、現像ローラー1
の回動に逆らうように定められるとは、上記法面nに対
し、基面71が、尖縁を中心として、oo以上、時計方
向へ傾いていることを意味する。Then, the arrangement position of the frictional charging member 7 changes to the position of the developing roller 1.
The term ``determined so as to oppose the rotation'' means that the base surface 71 is tilted clockwise by more than oo with respect to the slope n, with the apical edge as the center.
上記法面nと基面71とのなす角を02とする。The angle formed by the slope n and the base surface 71 is assumed to be 02.
角8,および角a2 は、次の条件を満足しなければな
らない。Corner 8 and angle a2 must satisfy the following conditions.
すなわち、その条件とは、oo<8,S90o o0
S82<900 および00<8,十82 S900
である。That is, the condition is oo<8, S90o o0
S82<900 and 00<8,182 S900
It is.
これが、摩擦帯電部材7の形状、および配設態位を定め
るということの内容である。現像剤Dは、該例では、摩
擦帯電部村7と現像ローラー1との当鞍部上位に適宜供
給される。場合によっては、摩擦帯電部材7を、第1図
に示すホツパー2の側板21として用いても良い。さて
、摩擦帯電部材7の、尖緑と逆側の側端面には、圧縮性
のばね8の一端が固定され、このばね8の池端は、不動
部村6に当綾しており、ばね8の弾性力により、摩擦帯
電部材8の尖緑は、現像ローラー1の筒面に圧接する。
さて、摩擦帯電部材7の尖線形状および配設態位が、上
記の条件を満たすように定められるとき、現像ローラー
ーの周面とともに移動する現像剤Dは、摩擦帯電部材7
によって、圧縮されることは少なく、従って、現像剤の
凝集や固化は生じにくい状態に保たれる。This is the content of determining the shape and disposition of the frictional charging member 7. In this example, the developer D is appropriately supplied to the upper part of the saddle between the frictional charging section 7 and the developing roller 1. In some cases, the frictional charging member 7 may be used as the side plate 21 of the hopper 2 shown in FIG. Now, one end of a compressible spring 8 is fixed to the side end surface of the frictional charging member 7 on the opposite side to the pointed green. Due to the elastic force of the triboelectric charging member 8, the green point of the frictional charging member 8 is pressed against the cylindrical surface of the developing roller 1.
Now, when the triangular shape and arrangement position of the triboelectric charging member 7 are determined to satisfy the above-mentioned conditions, the developer D moving together with the circumferential surface of the developing roller is
As a result, the developer is less likely to be compressed, and therefore the developer is kept in a state where aggregation and solidification are less likely to occur.
また、摩擦帯電部材7の、現像ローラー1に対する圧接
部が尖緑となっているため、上記圧後部に圧嬢力が有効
に集中し、従って、ばね8の弾性力が比較的小さくても
、現像ローラー1の周面に、十分に薄い「均一な現像剤
層を形成しうるのである。Furthermore, since the portion of the frictional charging member 7 that is pressed against the developing roller 1 has a pointed green shape, the pressing force is effectively concentrated on the pressing portion, and therefore, even if the elastic force of the spring 8 is relatively small, A sufficiently thin and uniform developer layer can be formed on the circumferential surface of the developing roller 1.
もちろん、ばね8の弾性力が強すぎれば、現像剤Dは、
凝集したり固化したりすることもあるから、ばね8の強
さは、このようなことがないような大きさに設定しなけ
ればならない。Of course, if the elastic force of the spring 8 is too strong, the developer D will
Since agglomeration and solidification may occur, the strength of the spring 8 must be set to a value that prevents this from occurring.
なお、現像ローラー1の回動スピードなど「現像条件は
、従来どうりで良い。Note that the developing conditions, such as the rotational speed of the developing roller 1, may be the same as conventional ones.
以上、本発明によれば、1成分系現像剤を用いる現像方
式において、現像機能を向上させうる現像剤摩擦帯電装
置を提供できる。As described above, according to the present invention, it is possible to provide a developer triboelectric charging device that can improve the developing function in a developing system using a one-component developer.
第1図および第2図は、従来知られている1成分現像剤
を用いる現像装置の例を示す説明図、第3図は、本発明
の一実施例を、その要部のみ示す説明図的正面図、第4
図は、摩擦帯電部材の形状を説明するための部分斜視図
である。
1・・・・・・現像ローフー、12・・・・・・導電性
ゴム層、7・・・・・・摩擦帯電部材、71…・・・基
面、72・・・・・・斜面、8・・・・・・圧縮性のば
ね、D・・・・・・現像剤。
稀イ図猪2図
棒3図
第4図1 and 2 are explanatory diagrams showing an example of a developing device using a conventionally known one-component developer, and FIG. 3 is an explanatory diagram showing only the essential parts of an embodiment of the present invention. Front view, 4th
The figure is a partial perspective view for explaining the shape of the frictional charging member. DESCRIPTION OF SYMBOLS 1...Development roller, 12...Conductive rubber layer, 7...Frictional charging member, 71...Base surface, 72...Slope, 8... Compressible spring, D... Developer. Rare illustration of boar, 2 figures of sticks, 3 figures, 4th figure
Claims (1)
ーラーの周面に、粉体の非磁性トナーのみで構成された
1成分系の現像剤を薄層状に保持し、現像ローラーの回
動により搬送しつつ、現像すべき静電潜像と逆極性に帯
電させて、静電潜像の現像に供する現像方式において、
現像剤を摩擦帯電させるための装置であって、直線状の
端縁部を有する板の、上記端縁部の先端を尖縁に成形し
てなる摩擦帯電部材と、上記尖縁が、装置空間の定位置
で、現像ローラーの周面に、長さ方向にわたって、当接
するように、上記摩擦帯電部材の態位を維持する手段と
を有し、上記摩擦帯電部材の尖縁を、上記基面が、現像
剤を迎える側に向くようにして、且つ上記現像ローラー
の回動にさからうように、上記現像ローラーに圧接させ
、上記尖縁における基面と斜面とのなす角θ_1および
、圧接部における現像ローラー周面の法面と上記基面と
のなす角θ_2とが、条件0°<θ_1≦90°、0°
≦θ_2<90°、0°<θ_1+θ_2≦90°を満
足するように、上記尖縁の形状および上記摩擦帯電部材
の配設態位を定め、トナーの凝集固化が生じないように
したことを特徴とする現像剤摩擦帯電装置。1 A thin layer of a one-component developer made only of powdered non-magnetic toner is held on the circumferential surface of a developing roller whose circumferential surface is made of conductive rubber, and is transported by the rotation of the developing roller. However, in a development method in which the electrostatic latent image is charged to a polarity opposite to that of the electrostatic latent image to be developed, the electrostatic latent image is developed.
A device for triboelectrically charging a developer, wherein the triboelectric charging member is formed by forming a tip of the edge of a plate having a straight edge into a sharp edge, and the sharp edge is arranged in an apparatus space. means for maintaining the position of the triboelectric charging member so as to be in contact with the circumferential surface of the developing roller in the longitudinal direction at a fixed position, the tip of the triboelectric charging member being brought into contact with the base surface. is brought into pressure contact with the developing roller so that it faces the side that receives the developer and opposes the rotation of the developing roller, and the angle θ_1 between the base surface and the slope at the tip and the angle θ_1 at the pressure contact portion are The angle θ_2 between the slope of the circumferential surface of the developing roller and the base surface meets the conditions 0°<θ_1≦90°, 0°
The shape of the pointed edge and the arrangement position of the frictional charging member are determined so as to satisfy ≦θ_2<90°, 0°<θ_1+θ_2≦90°, and the toner is prevented from coagulating and solidifying. A developer triboelectric charging device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1592677A JPS6015068B2 (en) | 1977-02-16 | 1977-02-16 | Developer triboelectric charging device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1592677A JPS6015068B2 (en) | 1977-02-16 | 1977-02-16 | Developer triboelectric charging device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS53101431A JPS53101431A (en) | 1978-09-04 |
JPS6015068B2 true JPS6015068B2 (en) | 1985-04-17 |
Family
ID=11902375
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1592677A Expired JPS6015068B2 (en) | 1977-02-16 | 1977-02-16 | Developer triboelectric charging device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6015068B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01112183U (en) * | 1988-01-23 | 1989-07-27 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5988761A (en) * | 1982-11-15 | 1984-05-22 | Ricoh Co Ltd | Developing device |
JP2920917B2 (en) * | 1988-08-08 | 1999-07-19 | ミノルタ株式会社 | Developing device |
JPH03108254U (en) * | 1990-02-23 | 1991-11-07 |
-
1977
- 1977-02-16 JP JP1592677A patent/JPS6015068B2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01112183U (en) * | 1988-01-23 | 1989-07-27 |
Also Published As
Publication number | Publication date |
---|---|
JPS53101431A (en) | 1978-09-04 |
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