JPS60250376A - Electrostatic latent image developing device - Google Patents

Electrostatic latent image developing device

Info

Publication number
JPS60250376A
JPS60250376A JP10732084A JP10732084A JPS60250376A JP S60250376 A JPS60250376 A JP S60250376A JP 10732084 A JP10732084 A JP 10732084A JP 10732084 A JP10732084 A JP 10732084A JP S60250376 A JPS60250376 A JP S60250376A
Authority
JP
Japan
Prior art keywords
toner
latent image
magnetic
magnetic field
electrostatic latent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP10732084A
Other languages
Japanese (ja)
Inventor
Takasumi Wada
孝澄 和田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kyocera Corp
Original Assignee
Kyocera Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kyocera Corp filed Critical Kyocera Corp
Priority to JP10732084A priority Critical patent/JPS60250376A/en
Publication of JPS60250376A publication Critical patent/JPS60250376A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/09—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Brush Developing In Electrophotography (AREA)

Abstract

PURPOSE:To reinforce a toner carrying force, and also to always feed a uniform toner to a latent image supporting body by forming a magnetic field generating layer magnetized by inclining a band-shaped anisotropic magnet in the carrying direction, on a toner carrying belt. CONSTITUTION:A magnetic field generating layer 8 on which an N pole and an S pole have been magnetized at a prescribed inclination angle with respect to a toner carrying direction is formed on a toner carrying belt 7. As for the magnetic field generating layer 8, an anisotropic magnet whose magnetic force is stronger than that of an isotropic magnet is used. Therefore, a toner can be carried by a strong magnetic force. Also, the magnetized direction is diagonal, therefore, even if an uneven adsorption of a magnetic toner exists in the axial direction of a latent image supporting body, when the carrying belt 7 turns, the magnetic toner is fed at the next time point, therefore, a uniform toner can always be fed to the latent image supporting body.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、少なくとも磁性粉末およびバインダー樹脂よ
り成る磁性トナーとよばれる一成分系現像剤を用いて、
電子写真方式複写機やファクシミリ等の静電潜像支持体
を現像する新たな装置Ｉこ関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention uses a one-component developer called a magnetic toner consisting of at least magnetic powder and a binder resin.
This invention relates to a new apparatus I for developing an electrostatic latent image support such as an electrophotographic copying machine or a facsimile machine.

〔従来の技術及びその問題点〕[Conventional technology and its problems]

磁性トナーは従来の非磁性トナーとキャリヤーの混合粉
体である二成分系トナーと異なり、現像剤は消耗するの
みで、キャリヤーの疲労などがないため補給のみですみ
、トナーとキャリヤーの摩擦帯電を良好ならしめ、ざら
に均一なトナー濃度とするための混合を必要としないな
ど数々の利点を有するため、二成分系トナ一に代って電
子写真式複写機やファクシミリ等をこ急激に採用されつ
つある。） 従来の磁性トナーの現像方式としては、第２図に示すよ
うにスリーブとよばれる円筒状のトナー支持体１と該ス
リーブ１の内部に同軸的に磁界発生手段２をもうけ、前
記スリーブ１と磁界発生手段２とを相対的に回転移動さ
せ、前記スリーブ１上の磁性トナー３を静電潜像支持体
４と接触・摺擦することにより現像するいわゆる磁気ブ
ラシ法がある。Unlike conventional two-component toner, which is a mixed powder of non-magnetic toner and carrier, magnetic toner only needs to be replenished because the developer is only consumed and there is no carrier fatigue. Because it has many advantages such as good toner toner and no need for mixing to obtain a roughly uniform toner density, it has been rapidly adopted in electrophotographic copying machines and facsimile machines instead of two-component toner. It's coming. ) As shown in FIG. 2, a conventional magnetic toner developing system includes a cylindrical toner support 1 called a sleeve and a magnetic field generating means 2 coaxially provided inside the sleeve 1. There is a so-called magnetic brush method in which the magnetic toner 3 on the sleeve 1 is brought into contact with and rubbed against the electrostatic latent image support 4 by rotating the magnetic field generating means 2 relative to the magnetic field generating means 2 for development.

しかしながらこの方法は、スリーブ１の表面が硬質であ
るため、静電潜像支持体４に傷をっけやすく、またトナ
ーの搬送力が弱くかつ高価である等の欠点を有している
。However, this method has drawbacks such as the hard surface of the sleeve 1, which easily scratches the electrostatic latent image support 4, and the toner conveying force is weak and expensive.

一方かかる欠点を解決する現像装置として、第３図１こ
示す搬送ベル）ｌこよるものが提案されている。On the other hand, as a developing device to solve this drawback, a conveyor belt shown in FIG. 3 has been proposed.

この方法は、第３図に示すように、磁性トナー３は、磁
性トナー搬送ベルト５より発生される磁界により該ベル
ト５表面に磁気的に吸着されて、静電潜像支持体４に搬
送される。第４図は磁性トナー搬送ベルト５の磁化領域
をあられしたものである。In this method, as shown in FIG. 3, the magnetic toner 3 is magnetically attracted to the surface of the magnetic toner conveying belt 5 by a magnetic field generated by the belt 5, and is conveyed to the electrostatic latent image support 4. Ru. FIG. 4 shows the magnetized region of the magnetic toner conveying belt 5. As shown in FIG.

搬送ベルトによる磁性トナーの吸着・搬送は第２図に示
す磁気ブラシ法ｆこ比べて搬送力もアップし、静電潜像
支持体を傷つける々し）う問題はなくなるが、従来の搬
送ベルトには次のような欠点がある。Compared to the magnetic brush method shown in Fig. 2, magnetic toner is attracted and transported by a conveyor belt, and the conveyance force is increased, eliminating the problem of damaging the electrostatic latent image support. It has the following drawbacks:

すなわち第３図に示すように従来の搬送ベルトの場合、
ベルト表面の磁界発生層として等方性磁石を着磁して使
用しているので、磁力が弱く磁性トナーの搬送力も弱く
なるという問題点がある。In other words, as shown in Fig. 3, in the case of a conventional conveyor belt,
Since an isotropic magnet is magnetized and used as the magnetic field generation layer on the belt surface, there is a problem that the magnetic force is weak and the magnetic toner conveying force is also weak.

さらに、搬送ベルト上の磁界発生層６は、第４図のよう
にＮ極・：３極を交互に縦方向に着磁しであるために、
横方向つまり静電潜像支持体の軸方向では磁性トナーの
吸着が均一とはならず、現像の強弱すなわち現像むらを
生じてしまうという欠点があった。Furthermore, since the magnetic field generating layer 6 on the conveyor belt is vertically magnetized with N poles and three poles alternately as shown in FIG.
In the lateral direction, that is, in the axial direction of the electrostatic latent image support, the magnetic toner is not attracted uniformly, and there is a drawback that the strength of development is varied, that is, uneven development occurs.

〔問題点を解決するための手段〕[Means for solving problems]

上記問題点を解決するために講じた本発明の手段は次の
通りである。げ）トナー搬送ベルトの磁界発生層を異方
性磁石の着磁によって形成する、（ロ）磁界発生層の表
面形状をトナー搬送方向に対し傾斜させトナーの搬送量
を平均化させる。The measures of the present invention taken to solve the above problems are as follows. g) The magnetic field generating layer of the toner conveying belt is formed by magnetizing an anisotropic magnet. (b) The surface shape of the magnetic field generating layer is inclined with respect to the toner conveying direction to equalize the amount of toner conveyed.

〔作用〕[Effect]

本発明は上述のように構成されているので、ホ立ユ異方
性磁石によって形成される磁界発生層の着磁力が強くな
り、トナーの搬送力も強化されるとともに、該磁界発生
層の形状が傾斜しているので回動するベルトと静電潜像
支持体の接触面において常に均−Ｅこトナーが供給され
ることとなる。Since the present invention is configured as described above, the magnetizing force of the magnetic field generating layer formed by the anisotropic magnet is strengthened, the toner conveying force is also strengthened, and the shape of the magnetic field generating layer is Since the belt is tilted, toner is always uniformly supplied to the contact surface between the rotating belt and the electrostatic latent image support.

〔実施例〕〔Example〕

第１図は本発明の一実施例であり、磁性トナー搬送ベル
ト７を正面からみた図である。図示するように、本発明
の搬送ベルト７は、その表面に矢印で示すトナー搬送方
向に対し所定の傾斜角度をもってＮ極・Ｓ極が着磁され
た磁界発生層８が形成されている１、ざら【こ該磁界発
生層８は等方性磁石よりも磁力の強い異方性磁石を用い
ている。FIG. 1 shows one embodiment of the present invention, and is a view of a magnetic toner conveying belt 7 viewed from the front. As shown in the figure, the conveyor belt 7 of the present invention has a magnetic field generating layer 8 formed on its surface with north and south poles magnetized at a predetermined inclination angle with respect to the toner conveyance direction shown by the arrow 1. The magnetic field generating layer 8 uses an anisotropic magnet having a stronger magnetic force than an isotropic magnet.

本発明の搬送ベルト７は以上のように構成されているの
で、第３図に示すものと同じように搬送ベルト７を回動
させることによって搬送ベルト７上の磁界発生層８が常
に静電潜像支持体重こ磁性トナーを均一に供給すること
ができる。すなわち搬送ベルト７上の着磁方向が斜めで
あるので静電潜像支持体の軸方向で磁性トナーの吸着Ｇ
こムラがあっても、眼送ベルト７の回動により次の時点
では磁性トナーの供給が行なわれ、連続的には均一のト
ナー供給が行なわれるからである。Since the conveyor belt 7 of the present invention is constructed as described above, by rotating the conveyor belt 7 in the same manner as shown in FIG. The magnetic toner can be uniformly supplied to the image support. In other words, since the direction of magnetization on the conveyor belt 7 is oblique, the magnetic toner is attracted G in the axial direction of the electrostatic latent image support.
This is because even if there is unevenness, the magnetic toner is supplied at the next time due to the rotation of the eye feed belt 7, and the toner is continuously and uniformly supplied.

なお磁界発生層８の形成は、搬送ベルト７の回動速度及
び静電潜像支持体の回転速度に応じてその着磁方向の傾
斜角度を定めればよい。The magnetic field generating layer 8 may be formed by determining the inclination angle of its magnetization direction depending on the rotational speed of the conveyor belt 7 and the rotational speed of the electrostatic latent image support.

〔効果〕〔effect〕

以上説明したように本発明は、トナー搬送ベルトに異方
性磁石の磁界発生層を静電潜像支持体に対し傾斜角度を
もって形成したので強い磁力でトナーを搬送することが
できるとともに、常に均一１こトナーを静電潜像支持体
に供給することができる。As explained above, in the present invention, the magnetic field generating layer of the anisotropic magnet is formed on the toner conveying belt at an angle of inclination to the electrostatic latent image support, so that the toner can be conveyed with strong magnetic force and always uniformly. One toner can be applied to the electrostatic latent image support.

したがってトナーの供給むらによっておこる現像の強弱
を生じさせることのない安価な現像装置を得ることがで
きるという効果を有する。Therefore, it is possible to obtain an inexpensive developing device that does not cause variations in the strength of development caused by uneven supply of toner.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明ｔとよるトナー搬送ベルトを示す正面図
である。 第２図及び第３図は従来の現像装置を示す断面図である
。第４図は従来のトナー搬送ベルトを示す正面図である
。 ４・・・・・静電潜像支持体 ５．７・・・磁性トナー搬送ベルト ６．８　・・磁　界　発　生　肩 出願人　京セラ株式会社FIG. 1 is a front view showing a toner conveying belt according to the present invention. FIGS. 2 and 3 are cross-sectional views showing a conventional developing device. FIG. 4 is a front view showing a conventional toner conveying belt. 4... Electrostatic latent image support 5.7... Magnetic toner transport belt 6.8... Magnetic field generation Shoulder Applicant: Kyocera Corporation

Claims (1)

【特許請求の範囲】[Claims] 磁性トナー粒子を搬送ベルトを介して静電潜像支持体に
接触させることにより現像する静電潜像現像装置におい
て、前記搬送ベルト上に帯状の異方性磁石を搬送方向に
対して傾斜角度をもって着磁して磁界発生層を形成した
ことを特徴とする静電潜像現像装置。In an electrostatic latent image developing device that develops magnetic toner particles by bringing them into contact with an electrostatic latent image support via a conveyor belt, a belt-shaped anisotropic magnet is placed on the conveyor belt at an inclined angle with respect to the conveyance direction. An electrostatic latent image developing device characterized in that a magnetic field generating layer is formed by magnetization.
JP10732084A 1984-05-25 1984-05-25 Electrostatic latent image developing device Pending JPS60250376A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10732084A JPS60250376A (en) 1984-05-25 1984-05-25 Electrostatic latent image developing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10732084A JPS60250376A (en) 1984-05-25 1984-05-25 Electrostatic latent image developing device

Publications (1)

Publication Number Publication Date
JPS60250376A true JPS60250376A (en) 1985-12-11

Family

ID=14456073

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10732084A Pending JPS60250376A (en) 1984-05-25 1984-05-25 Electrostatic latent image developing device

Country Status (1)

Country Link
JP (1) JPS60250376A (en)

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