JPS61147264A - Method and device for forming toner layer - Google Patents
Method and device for forming toner layerInfo
- Publication number
- JPS61147264A JPS61147264A JP26844184A JP26844184A JPS61147264A JP S61147264 A JPS61147264 A JP S61147264A JP 26844184 A JP26844184 A JP 26844184A JP 26844184 A JP26844184 A JP 26844184A JP S61147264 A JPS61147264 A JP S61147264A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- toner layer
- magnetic
- carrier
- thickness
- 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
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
Description
【発明の詳細な説明】
「産業上の利用分野」
本発明は磁性トナーを用いて現像を行う電子写真現像装
置に適用Ｘれるトナー層形成方法及びその装置に関する
。DETAILED DESCRIPTION OF THE INVENTION "Industrial Application Field" The present invention relates to a toner layer forming method and an apparatus therefor which are applied to an electrophotographic developing device that performs development using magnetic toner.
「従来の技術」
従来より電子写真現像装置に適用されるトナー層形成方
法として、現像位置にトナーを搬送させるトナー担持体
にマイラーと呼ばれる薄板物質を接触させて、その接触
圧によりトナー層厚を規制する方法と、前記トナー担持
体上にドクターブレードと呼ばれるトナー層厚規制部材
を対向して配置し、両者の離間間隔によりトナー層厚を
規制する方法とが存在する。``Prior Art'' As a toner layer forming method conventionally applied to electrophotographic developing devices, a thin plate material called Mylar is brought into contact with a toner carrier that transports toner to a development position, and the toner layer thickness is controlled by the contact pressure. There is a method of regulating the toner layer thickness, and a method of arranging toner layer thickness regulating members called doctor blades facing each other on the toner carrier and regulating the toner layer thickness by the spacing between the two.
「発明が解決しようとする問題点」
しかしながら前者においては接触圧によりトナー層を形
成する為に、トナー層面に筋むらが出来易く、又かかる
筋むらを防止する為にトナー担持体表面を凹凸構造にし
、且つその断面形状を種々工夫したものが存在するが（
特開昭５５−１４０８５号）、流動性の悲いトナーを用
いた場合やトナーの凝集がある場合には、尚、前記欠点
を完全に解消することは出来なかった。"Problems to be Solved by the Invention" However, in the former method, since the toner layer is formed by contact pressure, streaks are likely to occur on the surface of the toner layer, and in order to prevent such streaks, the surface of the toner carrier has an uneven structure. However, there are products with various cross-sectional shapes (
However, in the case of using a toner with poor fluidity or in the case of toner aggregation, the above-mentioned drawbacks could not be completely eliminated.
又、後者においても、前記ドクターブレードにより形成
されたトナー層厚は、一般にブレードと担持体間離間間
隔よりいくぶん厚いものになる為ｉｆｉ記離間間隔は極
めて微小間隔に設定する必要があり、この為前記離間間
隔にトナーの凝集やっまりが発生し易く、■つその微小
間隔設定の為に極めて高い機械的精度が要求されるとい
う問題が発生していた。Also, in the latter case, the thickness of the toner layer formed by the doctor blade is generally somewhat thicker than the spacing between the blade and the carrier, so the ifi recording spacing must be set to an extremely small spacing. A problem has arisen in that toner agglomeration and clumps are likely to occur at the above-mentioned spacing, and extremely high mechanical precision is required to set the minute spacing.
かかる欠点を解消する為にトナー担持体に内包される固
定磁石集成体の周面に磁極を埋設し、又Ｉ・ナー担持体
を介して前記磁極と対向して配置されたトナー層厚規制
部材を磁性ブレードで構成することにより、トナー担持
体と磁性ブレードとの期間間隔間に磁力線を作用させ、
該磁力線によりトナー層厚規制位置に搬送されるトナー
量の規制と該トナーの解きほぐしを行い、均一なトナー
層の形成と前記離間間隔をトナー層厚より大、好ましく
は１．５倍量」二に設定可能に構成した装置が提案され
ている。（４￥開昭５５−１０３５６７号他）しかしな
がらかかる従来技術においても、基本的には前記トナー
担持体と非接触の状態で配置した磁性ブレードによりト
ナー層厚規制を行う為に、磁力線を作用させない他の従
来技術はどではないにしても尚、前記離間間隔を精度よ
く設定する必要があり、その調整が面倒である。In order to eliminate this drawback, a magnetic pole is embedded in the circumferential surface of a fixed magnet assembly included in a toner carrier, and a toner layer thickness regulating member is placed opposite to the magnetic pole via the toner carrier. By configuring the magnetic blade with a magnetic blade, lines of magnetic force act between the toner carrier and the magnetic blade,
The magnetic lines of force regulate the amount of toner conveyed to the toner layer thickness regulating position and loosen the toner, forming a uniform toner layer and making the distance larger than the toner layer thickness, preferably 1.5 times the amount. A device has been proposed that can be set to (4￥Kokai No. 55-103567, etc.) However, even in such conventional technology, the toner layer thickness is basically controlled by a magnetic blade arranged in a non-contact state with the toner carrier, so that no magnetic lines of force are applied. In other conventional techniques, it is still necessary to set the spacing with high precision, and the adjustment is troublesome.
又、前記のようにトナーの解きほぐしとトナー層厚規制
を同時に行うトナー層形成方法では、トナー担持体の高
速化を図った場合、トナーの解きほぐしが十分行われな
い間にトナーの層厚規制が行われる可能性もあり、均一
なトナー層の形成が困難になる場合がある。In addition, in the toner layer forming method that simultaneously loosens the toner and regulates the toner layer thickness as described above, if the speed of the toner carrier is increased, the regulation of the toner layer thickness may occur while the toner is not sufficiently loosened. This may make it difficult to form a uniform toner layer.
更に、前記従来技術によれば磁性ブレードの上流側壁面
にトナーが堆積し易く、面も前記磁性ブレードの離間間
隔がトナー層規制厚より犬に設定している為に、該堆積
したトナーが磁性ブレード下流側又は前記離間間隔位置
に侵入し易く、整形されたトナー層を乱す恐れもある。Furthermore, according to the prior art, toner tends to accumulate on the upstream side wall surface of the magnetic blade, and since the spacing between the magnetic blades is set to be smaller than the toner layer regulation thickness, the deposited toner tends to accumulate on the upstream wall surface of the magnetic blade. It is easy to enter the downstream side of the blade or the spaced apart position, and there is a possibility that the shaped toner layer may be disturbed.
本発明が解決しようとする他の技術的課題は、前記トナ
ー層厚規制とトナーの解きほぐしを個別に、且つ最も好
ましい状態で行い、均一なトナー層の形成とトナー層厚
の薄膜化を達成し得るトナー層形成方法及びその装置を
提供することを目的とする。Another technical problem to be solved by the present invention is to perform the toner layer thickness regulation and toner loosening separately and in the most favorable conditions, thereby achieving the formation of a uniform toner layer and a reduction in the toner layer thickness. An object of the present invention is to provide a toner layer forming method and an apparatus therefor.
「第１発明の概要」
第１発明は前記技術的課題を達成する為に、トナー担持
体上に担持されながら現像位置方向に移動するトナーを
、接触圧により所定の層厚に規制した後、該層厚規制さ
れたトナー層に磁力線を作用させ、トナーの解きほぐし
を行わしめたトナー層形成方法を提案する。"Summary of the First Invention" In order to achieve the above-mentioned technical problem, the first invention aims to regulate the toner, which is carried on a toner carrier and moves in the direction of the development position, to a predetermined layer thickness by contact pressure. We propose a toner layer forming method in which lines of magnetic force are applied to the toner layer whose thickness is regulated to loosen the toner.
かかる構成によれば前記接触圧でトナー層厚の規制を行
いつつも、その下流側でトナーの解きほぐしを行う為に
、トナー層面に筋むらその他が発生した場合でもこれを
解消し、均一なトナー層形成が可能となる。According to this configuration, while the toner layer thickness is regulated by the contact pressure, the toner is loosened on the downstream side, so even if streaks or other unevenness occurs on the toner layer surface, this can be eliminated and a uniform toner can be produced. Layer formation becomes possible.
又、前記トナーの解きほぐしは、一般に磁性ブレードを
用いて行う訳であるが、本発明は磁性ブレードをトナー
層厚規制に関与させる必要がない為に、トナー担持体間
の離間間隔をラフに設定出来、その精度調整が容易であ
る。Further, the toner is generally loosened using a magnetic blade, but in the present invention, since there is no need for the magnetic blade to be involved in regulating the toner layer thickness, the spacing between the toner carriers is set roughly. It is easy to adjust the accuracy.
更に、前記磁性ブレードは前記トナー層厚規制手段の下
流側に磁性ブレードを配置させている為に、磁性ブレー
ド上流側壁面にトナーが堆積する恐れはなく、トナー層
の乱れを完全に防止し得る。Furthermore, since the magnetic blade is arranged downstream of the toner layer thickness regulating means, there is no risk of toner being deposited on the upstream wall surface of the magnetic blade, and disturbance of the toner layer can be completely prevented. .
又本発明によれば、前記トナー層厚規制とトナーの解き
ほぐしを個別に行う為に、トナー担持体の高速化を図っ
た場合でも、トナーの層厚規制とトナーの解きはぐしか
確実に行われ、均一なトナー層の形成が容易になる。Further, according to the present invention, since the toner layer thickness regulation and toner loosening are performed separately, even if the speed of the toner carrier is increased, only the toner layer thickness regulation and toner loosening can be performed reliably. , it becomes easier to form a uniform toner layer.
更に本発明によれば前記磁性ブレードとトナー担持体間
に形成された反発磁界形成領域中でトナーの解きほぐし
を行うことにより、該解きはぐしか一層完全になる。Further, according to the present invention, by disentangling the toner in the repulsion magnetic field forming region formed between the magnetic blade and the toner carrier, the disentangling becomes more complete.
更に又本発明によれば、トナー層厚規制後のトナー層」
二方空間が、トナーの解きほぐし位置に達するまで隠蔽
させることにより、外部よりの浮遊トナーや凝集トナー
の侵入を抑えることが出来。Furthermore, according to the present invention, the toner layer after regulating the toner layer thickness.
By concealing the two-sided space until it reaches the toner loosening position, it is possible to suppress the intrusion of floating toner and aggregated toner from the outside.
効果的なトナーの解きはぐしと均一トナー層の整形が容
易になる。Effective toner loosening and shaping of a uniform toner layer become easier.
更に本発明によれば前記トナー層厚の規制を接触圧に加
えて磁気的吸引力により行うことにより、トナー担持体
の振動その他により生ずる接触圧のバラツキを吸収し、
一層均一なトナー層厚の形成が可能となる。Furthermore, according to the present invention, the toner layer thickness is regulated by magnetic attraction force in addition to contact pressure, thereby absorbing variations in contact pressure caused by vibrations of the toner carrier, etc.
It becomes possible to form a more uniform toner layer thickness.
更に前記トナーの層厚規制位置において、トナーＩＦ！
持体と接触圧との協同作用により、トナー押持体反移動
方向への逆戻しをｔｉｎ Ｉｈし、ｎ、つ前記接触位置
で回転又は撹拌されながらトナー層形成を行うよう構成
することにより、一層均一なトナー層の形成が可能とな
る。Furthermore, at the toner layer thickness regulation position, toner IF!
By the cooperative action of the holding body and the contact pressure, the toner holding body is moved back in the opposite direction of movement, and the toner layer is formed while being rotated or stirred at the contact position. A more uniform toner layer can be formed.
「第２発明の概要」
第２発明は前記第１発明を円滑に達成する為に発明され
たトナー層形成装置で、現像位置−Ｌ流側のＩ・ナー枦
持体Ｉ−に、該トナー担持体移動方向に沿って順次、ト
ナー層厚規制手段と磁界形成手段とを設け、該規制手段
により層厚規制されたトナー層が、前記磁界形成領域中
で解きほぐされた後、現像位置に達するよう構成した事
にあり、前記トナー層形成手段は一般的に弾性を有する
非磁性薄板をトナー担持体−Ｌにトナー層を介して圧接
することにより構成することが出来、又磁界形成手段は
トナーＩＩ″！持体の背面側に配設した固定磁極と実質
的に対向する位置にトナ−１１持体」−に磁性ブレード
を配置して構成する事が出来る。"Summary of the Second Invention" The second invention is a toner layer forming apparatus invented to smoothly achieve the first invention, in which the toner A toner layer thickness regulating means and a magnetic field forming means are sequentially provided along the carrier moving direction, and after the toner layer whose thickness is regulated by the regulating means is loosened in the magnetic field forming region, the toner layer is moved to a developing position. The toner layer forming means can generally be constructed by pressing an elastic non-magnetic thin plate onto the toner carrier-L via the toner layer, and the magnetic field forming means Toner II''! can be constructed by arranging a magnetic blade on the toner holder at a position substantially facing the fixed magnetic pole provided on the back side of the holder.
尚、前記磁界形成手段として、トナー担持体の背面側に
同極性の固定磁石を隣接して配置し、該固定磁石により
形成Ｘれる反発磁界形成領域中に磁性ブレードを位置せ
しめ、該ブレードの離間間隔位置に生ずる反発磁界によ
り解きほぐしを行うよう構成する事により一層効果的な
解きほぐしを行うことが出来る。As the magnetic field forming means, fixed magnets of the same polarity are arranged adjacent to each other on the back side of the toner carrier, a magnetic blade is positioned in a repulsive magnetic field forming region formed by the fixed magnet, and the separation of the blades is More effective loosening can be achieved by configuring the loosening to be performed by repulsive magnetic fields generated at intervals.
又本発明によれば前記トナー層厚規制手段を構成する非
磁性薄板を前記磁性ブレードより」二流側に引き出し、
その自由端側か前記トナー担持体上に圧接されるよう構
成する事により、層厚規制位置よりトナーの解きほぐし
位置までのトナー層のに実空間を隠蔽することが出来、
而も前記非磁性薄板を支持固定する為の特別な部材も不
要となり、装置の小型化が達成される。Further, according to the present invention, the non-magnetic thin plate constituting the toner layer thickness regulating means is pulled out from the magnetic blade to the second flow side,
By configuring the free end side to be pressed against the toner carrier, it is possible to hide the real space in the toner layer from the layer thickness regulation position to the toner loosening position,
Furthermore, there is no need for any special member for supporting and fixing the non-magnetic thin plate, and the device can be miniaturized.
更に本発明によれば、前記非磁性薄板の自由端側の背面
側、即ちトナー担持体との圧接面の背面側に磁性体を配
置し、非磁性薄板がトナー担持体に向け、磁気的吸引力
を生じるように構成することにより、振動その他から生
じるトナー層規制厚のバラツキを防止出来る。Further, according to the present invention, a magnetic material is disposed on the back side of the free end side of the non-magnetic thin plate, that is, on the back side of the surface in pressure contact with the toner carrier, so that the non-magnetic thin plate is directed toward the toner carrier, and magnetically attracted. By configuring the device to generate force, it is possible to prevent variations in the toner layer regulation thickness caused by vibrations and other factors.
更に又本発明によれば、前記非磁性薄板と接するトナー
担持体表面に、トナー担持体の移動方向に対しその両側
に所定角度傾斜させて形成される格子状凹溝を形成する
ことにより、該トナー担持体に圧接される非磁性薄板と
の協同作用により、トナー担持体反移動方向への逆戻し
を阻１トし、且つ前記接触位置で回転又は撹拌されなが
らトナー規制を行うことが出来、流動性の悪いトナーを
用いた場合や凝集したトナーが存在する場合でも均一な
トナー層形成が可能となる。Furthermore, according to the present invention, lattice-like grooves are formed on the surface of the toner carrier in contact with the non-magnetic thin plate and are inclined at a predetermined angle on both sides with respect to the moving direction of the toner carrier. Through a cooperative action with a non-magnetic thin plate pressed against the toner carrier, it is possible to prevent the toner carrier from returning in the opposite direction of movement, and to regulate the toner while being rotated or stirred at the contact position; Even when toner with poor fluidity is used or aggregated toner is present, it is possible to form a uniform toner layer.
尚、このようにトナ−１１持体表面を凹凸構造にする技
術は既に種々存在し、例えばブラスト処理により四部を
散在して形成したもの、又はトナー担持体の移動方向と
直交する方向（軸線方向）に門構を形成したものが存在
する。There are already various techniques for making the surface of the toner carrier 11 have an uneven structure, such as one in which the surface of the toner carrier 11 is formed with four parts scattered about by blasting, and one in which the surface is formed in four parts by a blasting process, or in a direction perpendicular to the direction of movement of the toner carrier (in the axial direction). ), there is one that formed a gate structure.
しかしながら前者においては凹部が散在している為に、
後者においても移動方向に対し直交する方向に凹溝が形
成されている為に、該凹部等に収納されたトナーが移動
しながら回転又は撹拌されるという作用を達成し得ない
。However, in the former case, since the recesses are scattered,
In the latter case as well, since the grooves are formed in a direction perpendicular to the moving direction, it is impossible to achieve the effect that the toner stored in the grooves is rotated or stirred while moving.
又本実施例と異なり、前記凹溝を移動方向に沿って平行
に形成した場合は、前記回転又は撹拌は可能であるが、
筋溝が出来易くなり、やはり問題が生じる。Also, unlike this embodiment, if the grooves are formed parallel to the moving direction, the rotation or stirring is possible;
This makes it easier for muscle grooves to form, which also causes problems.
尚、前記凹溝源さは、トナー平均粒径の１／４〜３倍に
して、且つ隣接する凹溝間圧＃（ピッチ）が、凹溝幅の
１〜５倍に設定するのが好ましい。The width of the groove source is preferably set to 1/4 to 3 times the average particle diameter of the toner, and the pressure # (pitch) between adjacent grooves is preferably set to 1 to 5 times the width of the groove. .
すなわち、前記凹溝源５がトナー平均粒径の１／４以下
、又は凹溝ピッチが凹溝幅の５倍以上では、凹溝形成効
果が達せられず、又前記凹溝源さがトナー平均粒径の３
倍以上では現像の際、画像形成に悪影響を及ぼす。更に
、凹溝ピッチが凹溝幅の１倍以下では、非磁性薄板との
摺擦により摩耗し耐久性が低下する。That is, if the groove source 5 is 1/4 or less of the average particle diameter of the toner, or if the groove pitch is 5 times or more the groove width, the groove forming effect cannot be achieved, and the groove source 5 is particle size 3
If it is more than double the amount, it will adversely affect image formation during development. Furthermore, if the pitch of the grooves is less than 1 times the width of the grooves, abrasion occurs due to friction with the non-magnetic thin plate, resulting in decreased durability.
「実施例」
以下、図面を参照して本発明の好適な実施例を例示的に
詳しく説明する。ただしこの実施例に記載されている構
成部品の・Ｊ法、材質、形状、その相対配置などは特に
特定的な記載がない限りは、この発明の範囲をそれのみ
に限定する趣旨ではなく、弔なる説明例に過ぎない。"Embodiments" Hereinafter, preferred embodiments of the present invention will be described in detail by way of example with reference to the drawings. However, unless otherwise specified, the J method, material, shape, relative arrangement, etc. of the component parts described in this example are not intended to limit the scope of this invention. This is just an illustrative example.
第１図は本発明に基ずいて構成された現像装置の概略構
成を示す。FIG. 1 shows a schematic structure of a developing device constructed based on the present invention.
ｌは表面に光導電層が形成された感光体ドラム、２は固
定磁石集成体３を内包する非磁性スリーブで、両部材１
．２は現像位置（最近接位置）において空隙間隔が約２
００川になるよう対向して配置すると共に、感光体ドラ
ム１は時計方向、非磁性スリーブ２は反時計方向に、夫
々等しい周速で回転するよう構成する。1 is a photosensitive drum having a photoconductive layer formed on its surface; 2 is a nonmagnetic sleeve containing a fixed magnet assembly 3;
．． 2 has a gap distance of approximately 2 at the development position (nearest position)
The photosensitive drum 1 and the non-magnetic sleeve 2 are arranged to face each other in a clockwise direction, and the non-magnetic sleeve 2 is rotated counterclockwise at the same circumferential speed.
現像位置１−流側の固定磁石集成体３外周面一１−には
軸線方向に沿って平行に、同極性の固定磁石４ａ、４ｂ
を所定間隔離間させて隣接配置し、該固定磁石４ａ、４
ｂにより非磁性スリーブ２−ｈに反発磁界が形成される
よう構成する。Fixed magnets 4a and 4b of the same polarity are arranged parallel to the axial direction on the outer circumferential surface of the fixed magnet assembly 3 on the downstream side of the developing position 1.
are arranged adjacent to each other with a predetermined spacing between them, and the fixed magnets 4a, 4
b, so that a repulsive magnetic field is formed in the non-magnetic sleeve 2-h.
即ち、前記固定磁石４ａ、４ｂは非磁性スリーブ２−、
Ｉ＝の最大磁束密度が夫々６００ガウスになるよう形成
され、而も該固定磁石４ａ、４ｂ間の中間位置における
磁束落込み量が１００ガウス以」−になるよう固定磁石
４ａ、４ｂの離間間隔を設定している。つまり前記磁束
落込み量が１００ガウス以下では良好な反発磁界の形成
が困難になる。That is, the fixed magnets 4a and 4b are attached to the non-magnetic sleeve 2-,
The fixed magnets 4a and 4b are spaced so that the maximum magnetic flux density of I= is 600 Gauss each, and the magnetic flux drop at the intermediate position between the fixed magnets 4a and 4b is 100 Gauss or more. is set. In other words, if the amount of magnetic flux drop is less than 100 Gauss, it becomes difficult to form a good repulsive magnetic field.
そして前記固定磁石４ａ、４ｂの隣接間隔内の非磁性ス
リーブ２」―には所定間隔離間させて、前記固定磁石４
ａ 、 ４ｂと逆極性の磁石体ブレード６が配置され、
その先端面が前記反発磁界形成領域Ｈ中に位置するよう
構成する。具体的には、磁石体ブレード６は前記固定磁
石４ａ、４ｂの離間間隔内に位置され、その先端を矩形
状に形成すると共に、肉厚を０．３〜２ｆｆｌＩ１１の
範囲に設定している。The fixed magnets 4a and 4b are spaced apart from each other by a predetermined distance in the non-magnetic sleeves 2'' in the adjacent space between the fixed magnets 4a and 4b.
A magnetic blade 6 having a polarity opposite to that of a and 4b is arranged,
The tip surface thereof is configured to be located in the repelling magnetic field forming region H. Specifically, the magnet blade 6 is located within the distance between the fixed magnets 4a and 4b, has a rectangular tip, and has a wall thickness in the range of 0.3 to 2fflI11.
又前記磁石体ブレード６のトナー搬送方向下流側壁面に
は弾性を有する非磁性薄板７が取り伺けられ、下方に垂
下する非磁性薄板７の自由端側な磁石体ブレードの」二
流側に延設せしめ、前記−の固定磁石４ａと対応する位
置で非磁性スリーブ２表面に接するよう構成する。Further, an elastic non-magnetic thin plate 7 is provided on the downstream wall surface of the magnetic blade 6 in the toner conveying direction, and extends to the second flow side of the magnetic blade on the free end side of the non-magnetic thin plate 7 hanging downward. It is configured to contact the surface of the non-magnetic sleeve 2 at a position corresponding to the fixed magnet 4a (-).
勿論該非磁性薄板７の接触位置は前記固定磁石４ａｌｖ
！設位置より更に上流側でもよく、又前記磁石体ブレー
ド６の−に流側であれば、固定磁石４ａ配設位置の下流
側でもよいが、前記磁石体ブレード６に余りに近接し過
ぎると、反発磁界により層厚規制の規制厚にバラツキが
生じ易く、又余りに遠ざかると、前記反発磁界形成領域
Ｈ内に達する前に振動その他により層厚が乱れ、適正な
解きほぐしが行われない場合がある。Of course, the contact position of the non-magnetic thin plate 7 is the fixed magnet 4alv.
! It may be further upstream from the installation position, or it may be downstream from the installation position of the fixed magnet 4a as long as it is on the downstream side of the - of the magnet blade 6. However, if it is too close to the magnet blade 6, repulsion may occur. Variations in the regulation thickness of the layer thickness regulation are likely to occur due to the magnetic field, and if the regulation thickness is too far away, the layer thickness may be disturbed by vibration or other factors before reaching the repulsive magnetic field forming region H, and proper loosening may not be performed.
そしてこのような非磁性薄板７は一般に弾性ゴム、有機
樹脂等により形成可能であるが塩ビシートを用いると、
トナー層Ａとの摺擦により前記シート面にトナーが溶着
する恐れがあり、好ましいものではない。又前記非磁性
薄板７の肉厚は弾性力、非磁性スリーブ２との離間間隔
、及び該薄板の弾性係数等との関係により必要とする弾
性力に応じた肉厚が適宜決定される訳であるが、少なく
とも１００ ｐ、ｒａ以−には必要である。Such a non-magnetic thin plate 7 can generally be formed from elastic rubber, organic resin, etc., but if a PVC sheet is used,
There is a possibility that the toner will be welded to the sheet surface due to the friction with the toner layer A, which is not preferable. Furthermore, the thickness of the non-magnetic thin plate 7 is appropriately determined depending on the elastic force required, the distance from the non-magnetic sleeve 2, the elastic modulus of the thin plate, etc. However, it is necessary for at least 100 p, ra or higher.
第２図は前記非磁性薄板７と接する非磁性ス 。FIG. 2 shows a non-magnetic strip in contact with the non-magnetic thin plate 7.
リーブ２の表面形状を示す拡大展開図であり、第ｂ ３図はその断面図である。It is an enlarged developed view showing the surface shape of the rib 2, and Figure 3 is a sectional view thereof.
本図より理解される如く、非磁性スリーブ２表面には、
該スリーブ２の回転方向に対しその両側に４５°角度変
位させた傾斜線に沿って格子状の凹溝８が形成されてい
る。As understood from this figure, on the surface of the non-magnetic sleeve 2,
A lattice-shaped concave groove 8 is formed on both sides of the sleeve 2 along inclined lines displaced at an angle of 45 degrees with respect to the direction of rotation of the sleeve 2.
そして前記凹溝８の深さＤ及びピッチＰは前述した条件
によって設定されるが、トナー平均粒子径が１０ｇｍと
すると、前記深８０は３〜３０１１．Ｉｌｌ、ピッチｐ
は１０〜５０ｐｍ程度が適当である。そしてかかる凹溝
８の断面形状は第３図に示す如く矩形状に形成しても又
半円状に形成してもよい。The depth D and pitch P of the groove 8 are set according to the conditions described above, but if the average particle diameter of the toner is 10 gm, the depth 80 is 3 to 3011. Ill, pitch p
Appropriately, it is about 10 to 50 pm. The cross-sectional shape of the groove 8 may be rectangular as shown in FIG. 3 or semicircular.
又非磁性スリーブ２の回転方向に対する凹溝８の傾斜角
度は、１５〜７５度の範囲、好ましくは３０〜６０度の
範囲で任意に設定することが出来、又該凹溝８の格子形
状を必ずしも対称形状に形成する必要もない。The inclination angle of the grooves 8 with respect to the rotational direction of the non-magnetic sleeve 2 can be set arbitrarily in the range of 15 to 75 degrees, preferably in the range of 30 to 60 degrees. It is not necessarily necessary to form it into a symmetrical shape.
そしてこのような凹溝８の加工は、針状バイトを多数列
状に埋め込んだ金属ブラシやサンドベルトを前記スリー
ブ２表面に軸線方向に沿って当接させた後、該スリーブ
２を軸線方向に移動させながら正回転及び逆回転をさせ
ることにより簡単に形成出来る。勿論このような機械加
工でなく、高周波処理やエツチング等の電気的、化学的
加工方法を用いてもよい。Machining of such a groove 8 is carried out by bringing a metal brush or a sand belt in which many rows of needle-like bits are embedded into contact with the surface of the sleeve 2 along the axial direction, and then moving the sleeve 2 in the axial direction. It can be easily formed by rotating forward and backward while moving. Of course, instead of such mechanical processing, electrical or chemical processing methods such as high frequency processing or etching may be used.
かかる実施例によれば、前記非磁性スリーブ２の回転に
より非磁性薄板７の当接位置まで達したトナー層＾は、
該非磁性薄板７との圧接面に入り込みなから層厚規制さ
れた後、反発磁界形成領域Ｈ内に達すると、前記再固定
磁石４ａ、４ｂの反発力により非磁性スリーブ２の拘束
が解かれ、該スリーブ２より僅かに浮き−Ｌがり空中遊
泳状態を維持した後、そのトナー密度が相になったトナ
ー穂＾１を前記磁石体ブレード６により層厚した後、下
流側の固定磁石４ｂにより非磁性スリーブ２上に均−口
、つ密な状態で再配列され、極めて薄膜なトナー薄層Ａ
２が形成出来る。According to this embodiment, the toner layer ^ that has reached the contact position with the nonmagnetic thin plate 7 due to the rotation of the nonmagnetic sleeve 2 is
After the layer thickness is regulated to prevent it from entering the pressure contact surface with the non-magnetic thin plate 7, when it reaches the repulsive magnetic field forming region H, the restraint of the non-magnetic sleeve 2 is released by the repulsive force of the re-fixing magnets 4a and 4b. After maintaining the floating state in the air by floating slightly above the sleeve 2, the toner ears ^1 whose toner density has become a phase are layered by the magnetic blade 6, and then released by the fixed magnet 4b on the downstream side. An extremely thin toner layer A is rearranged evenly and densely on the magnetic sleeve 2.
2 can be formed.
尚、本実施例に使用された磁性トナーは、ポリスチレン
樹脂、磁性体（フェライト）、カーボンブラック、荷電
制御剤からなり、磁性体が３０〜４０屯量部含むものを
使用した。The magnetic toner used in this example consisted of a polystyrene resin, a magnetic material (ferrite), carbon black, and a charge control agent, and contained 30 to 40 parts by weight of the magnetic material.
かかる実施例においては、非磁性薄板７自由端側を非磁
性スリーブ２に圧接してトナー層厚の規制を行う為に、
外部部材よりの振動伝帳その他により該非磁性薄板７が
揺動し、接触圧が不安定になり易い。In this embodiment, in order to regulate the toner layer thickness by press-contacting the free end side of the non-magnetic thin plate 7 to the non-magnetic sleeve 2,
The non-magnetic thin plate 7 is likely to oscillate due to vibration transmission from an external member, and the contact pressure may become unstable.
第４図は、かかる実施例の欠点の解消を図った他の実施
例で、前記実施例との差異を中心に説明すると、前記非
磁性薄板７自由端側の非磁性スリーブ２表面との圧接位
置を前記−の固定磁石４ａと対応する位置に定め、該非
磁性薄板７の圧接面背面側に磁性体又は逆極性の磁石薄
板９を配設し、非磁性薄板７が非磁性スリーブ２へ向け
、磁気的吸引力が生じるように構成する。FIG. 4 shows another embodiment which aims to eliminate the drawbacks of the above embodiment.The differences from the previous embodiment will be mainly explained. The position is set at a position corresponding to the above fixed magnet 4a, and a magnetic thin plate 9 of magnetic material or of opposite polarity is arranged on the back side of the pressure contact surface of the non-magnetic thin plate 7, and the non-magnetic thin plate 7 is directed toward the non-magnetic sleeve 2. , configured to generate a magnetic attraction force.
この結果、前記磁気的吸引力により接触圧が安定化し、
振動その他から生じるトナー層規制厚のバラツキを防止
出来る。As a result, the contact pressure is stabilized by the magnetic attraction force,
It is possible to prevent variations in the toner layer regulation thickness caused by vibrations and other factors.
尚、逆極性の磁石薄板９を配設した場合は、前記非磁性
スリーブ２表面との圧接位置を固定磁石４ａと対応する
位置に定めなくても、磁気的吸引力が発生する。In addition, when the magnetic thin plate 9 of opposite polarity is provided, a magnetic attraction force is generated even if the position in pressure contact with the surface of the non-magnetic sleeve 2 is not set at a position corresponding to the fixed magnet 4a.
第１図は本発明の実施例に係る現像装置の全体概略図、
第２図はトナー担持体の表面形状を指示す拡大展開図、
第３図はその断面図、第４図は他の実施例に係る要部概
略図である。
第１図
７．′ｆ開昭ＦＥＩ−１４７２６４（７）第２図FIG. 1 is an overall schematic diagram of a developing device according to an embodiment of the present invention;
Figure 2 is an enlarged developed view showing the surface shape of the toner carrier;
FIG. 3 is a sectional view thereof, and FIG. 4 is a schematic diagram of main parts according to another embodiment. Figure 17. 'f Kaisho FEI-147264 (7) Fig. 2
Claims (1)
動するトナーを、接触圧により所定の層厚に規制した後
、該層厚規制されたトナー層に磁力線を作用させた事を
特徴とするトナー層形成方法 ２）層厚規制されたトナー層に磁力線を作用させること
によりトナーの解きほぐしを行わしめたことを特徴とす
る特許請求範囲第１項記載のトナー層形成方法。 ３）前記トナーの解きほぐしを、磁性ブレードとトナー
担持体間に形成された反発磁界形成領域中で行うことを
特徴とする特許請求の範囲第２項記載のトナー層形成方
法 ４）前記トナーの層厚規制を、弾性力を有する非磁性薄
板により行う事を特徴とする特許請求の範囲第１項から
第３項までのいずれか一項記載のトナー層形成方法 ５）層厚規制されたトナー層の上方空間が、トナーの解
きほぐし位置に達するまで隠蔽されていることを特徴と
する特許請求の範囲第１項から第４項までのいずれか一
項記載のトナー層形成方法 ６）前記トナー層厚の規制を、接触圧に加えて磁気的吸
引力を印加して行なう事を特徴とする特許請求の範囲第
１項から第５項までのいずれか一項記載のトナー層形成
方法。 ７）前記トナーの層厚規制位置において、該層厚規制さ
れるトナーの逆戻りが阻止され、且つ前記規制位置で回
転又は撹拌されながらトナー規制が行われる事を特徴と
する特許請求の範囲第１項から第６項までのいずれか一
項記載のトナー層形成方法。 ８）現像位置上流側のトナー担持体上に、該トナー担持
体移動方向に沿って順次、トナー層厚規制手段と磁界形
成手段とを設け、該規制手段により層厚規制されたトナ
ー層が、前記磁界形成領域中で解きほぐされた後、現像
位置に達するよう構成した事を特徴とするトナー層形成
装置 ９）前記トナー層厚規制手段が、弾性を有する非磁性薄
板をトナー層を介してトナー担持体上に圧接させること
により構成されたことを特徴とする特許請求の範囲第８
項記載のトナー層形成装置 １０）前記磁界形成手段が、トナー担持体上に所定間隔
離間して配した磁性ブレードと実質的に対向するトナー
担持体の背面側に固定磁極を配置して構成したことを特
徴とする特許請求の範囲第８項記載のトナー層形成装置 １１）トナー担持体の背面側に同極性の固定磁石を隣接
して配置し、該固定磁石により形成される反発磁界形成
領域中に磁性ブレードを位置せしめた事を特徴とする特
許請求の範囲第８項記載のトナー層形成装置 １２）前記非磁性薄板を磁性ブレードより上流側に引き
出し、その自由端側が前記トナー担持体上に圧接される
よう構成した事を特徴とする特許請求の範囲第９項から
第１１項までのいずれか一項記載のトナ層ー形成装置。 １３）前記非磁性薄板の、トナー担持体との圧接面の背
面側に磁性体を配置し、非磁性薄板がトナー担持体へ向
け、磁気的吸引力が生じるように構成した事を特徴とす
る特許請求の範囲第９項から第１２項までのいずれか一
項記載のトナー層形成装置。 １４）前記非磁性薄板と接するトナー担持体表面に、ト
ナー担持体の移動方向に対しその両側に所定角度傾斜さ
せて格子状凹溝を形成した事を特徴とする特許請求の範
囲第９項から第１３項までのいずれか一項記載のトナー
層形成装置。 １５）前記凹溝深さが、トナー平均粒径の１／４〜３倍
にして、且つ隣接する凹溝間距離（ピッチ）が、凹溝幅
の１〜５倍に設定したことを特徴とする特許請求の範囲
第１４項記載のトナー層形成装置 １６）前記トナー層厚規制手段を反発磁界形成領域より
引き出された可撓性の非磁性薄板で形成し、該非磁性薄
板が反発磁界形成領域の上流側でトナー層を介してトナ
ー担持体と接するよう構成した特許請求の範囲第８項記
載のトナー層形成装置 １７）前記非磁性薄板と接するトナー担持体表面に凹凸
面を形成し、該凹凸を形成する境界壁（辺）がトナー担
持体の移動方向の左右両側に存在し、且つその境界壁間
の内角が１８０度以下であることを特徴とする特許請求
の範囲第１６項記載のトナー層形成装置 １８）前記凹凸面を形成する凹部深さがトナー平均粒径
の１／４〜３倍であることを特徴とする特許請求の範囲
第１７項記載のトナー層形成装置 １９）隣接する凹部間距離が、前記境界壁と直交する断
面上で、凹部幅の１〜５倍であることを特徴とする特許
請求の範囲第１７項記載のトナー層形成装置[Claims] 1) After regulating the toner, which is carried on a toner carrier and moving in the direction of the development position, to a predetermined layer thickness by contact pressure, lines of magnetic force are applied to the toner layer whose thickness has been regulated. 2) A method for forming a toner layer according to claim 1, characterized in that the toner is loosened by applying lines of magnetic force to the toner layer whose thickness is regulated. . 3) The toner layer forming method according to claim 2, characterized in that the toner is loosened in a repulsion magnetic field forming region formed between a magnetic blade and a toner carrier 4) The toner layer 5) Toner layer forming method according to any one of claims 1 to 3, characterized in that the thickness is regulated by a non-magnetic thin plate having elastic force. 5) Toner layer with regulated thickness 6) The toner layer forming method according to any one of claims 1 to 4, wherein the upper space is hidden until a toner loosening position is reached. 6) The toner layer thickness. The toner layer forming method according to any one of claims 1 to 5, characterized in that the regulation is performed by applying magnetic attraction force in addition to contact pressure. 7) At the toner layer thickness regulation position, the toner whose layer thickness is regulated is prevented from returning, and the toner regulation is performed while being rotated or stirred at the regulation position. 6. The method for forming a toner layer according to any one of items 6 to 6. 8) A toner layer thickness regulating means and a magnetic field forming means are sequentially provided on the toner carrier upstream of the development position along the moving direction of the toner carrier, and the toner layer whose thickness is regulated by the regulating means is 9) The toner layer forming device is configured such that the toner layer reaches a developing position after being unraveled in the magnetic field forming region. Claim 8, characterized in that the toner is formed by being brought into pressure contact with the toner carrier.
10) The magnetic field forming means is configured by arranging a fixed magnetic pole on the back side of the toner carrier substantially facing the magnetic blades arranged on the toner carrier at a predetermined distance. 11) A toner layer forming apparatus according to claim 8, characterized in that fixed magnets of the same polarity are arranged adjacent to each other on the back side of the toner carrier, and a repulsive magnetic field forming region formed by the fixed magnets. 12) The toner layer forming device according to claim 8, characterized in that a magnetic blade is positioned therein. 12) The non-magnetic thin plate is pulled out upstream from the magnetic blade, and its free end side is placed on the toner carrier. The toner layer forming device according to any one of claims 9 to 11, characterized in that the toner layer forming device is configured to be pressed against the toner layer forming device. 13) A magnetic material is arranged on the back side of the surface of the non-magnetic thin plate that comes into pressure contact with the toner carrier, and the non-magnetic thin plate is directed toward the toner carrier to generate a magnetic attraction force. A toner layer forming apparatus according to any one of claims 9 to 12. 14) A lattice-shaped concave groove is formed on the surface of the toner carrier in contact with the non-magnetic thin plate on both sides thereof at a predetermined angle with respect to the moving direction of the toner carrier. The toner layer forming device according to any one of items up to item 13. 15) The depth of the groove is set to 1/4 to 3 times the average particle diameter of the toner, and the distance (pitch) between adjacent grooves is set to 1 to 5 times the width of the groove. Toner layer forming apparatus according to claim 14 16) The toner layer thickness regulating means is formed of a flexible non-magnetic thin plate drawn out from the repulsive magnetic field forming area, and the non-magnetic thin plate is formed in the repulsive magnetic field forming area. 17) A toner layer forming device according to claim 8, configured to contact the toner carrier through a toner layer on the upstream side of the toner carrier. Claim 16, wherein the boundary walls (sides) forming the unevenness are present on both left and right sides in the moving direction of the toner carrier, and the internal angle between the boundary walls is 180 degrees or less. Toner layer forming device 18) Adjacent toner layer forming device 19) as set forth in claim 17, wherein the depth of the concave portion forming the uneven surface is 1/4 to 3 times the average particle diameter of the toner. The toner layer forming apparatus according to claim 17, wherein the distance between the recesses is 1 to 5 times the width of the recesses on a cross section perpendicular to the boundary wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26844184A JPS61147264A (en) | 1984-12-21 | 1984-12-21 | Method and device for forming toner layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26844184A JPS61147264A (en) | 1984-12-21 | 1984-12-21 | Method and device for forming toner layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61147264A true JPS61147264A (en) | 1986-07-04 |
Family
ID=17458539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26844184A Pending JPS61147264A (en) | 1984-12-21 | 1984-12-21 | Method and device for forming toner layer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61147264A (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61166571A (en) * | 1985-01-18 | 1986-07-28 | Konishiroku Photo Ind Co Ltd | Developing device |
| JPS63135974A (en) * | 1986-11-27 | 1988-06-08 | Konica Corp | Developing device |
| JPS6394461U (en) * | 1986-12-09 | 1988-06-17 | ||
| JPH01114880A (en) * | 1987-10-28 | 1989-05-08 | Canon Inc | Developing device |
| JP2007127907A (en) * | 2005-11-04 | 2007-05-24 | Ricoh Co Ltd | Image forming apparatus |
| JP2007140082A (en) * | 2005-11-17 | 2007-06-07 | Seiko Epson Corp | Method for manufacturing developer carrier, developer carrier, developing device, and image forming apparatus |
| JP2007140080A (en) * | 2005-11-17 | 2007-06-07 | Seiko Epson Corp | Method for manufacturing developer carrier, developer carrier, developing device, and image forming apparatus |
| JP2007140081A (en) * | 2005-11-17 | 2007-06-07 | Seiko Epson Corp | Method for manufacturing developer carrier, developer carrier, developing device, and image forming apparatus |
| JP2007178901A (en) * | 2005-12-28 | 2007-07-12 | Seiko Epson Corp | Developing device, and image forming apparatus and system |
| JP2008116852A (en) * | 2006-11-07 | 2008-05-22 | Seiko Epson Corp | Developing roller, its manufacturing method, developing device, and image forming apparatus |
| US7599650B2 (en) | 2005-11-04 | 2009-10-06 | Ricoh Company Limited | Developer bearing member, developing device, process cartridge and image forming apparatus |
| JP2011064861A (en) * | 2009-09-16 | 2011-03-31 | Kyocera Mita Corp | Developing device and image forming apparatus comprising the same |
| US8086152B2 (en) | 2007-05-30 | 2011-12-27 | Seiko Epson Corporation | Developing device, image forming apparatus, image forming system, developing method, and toner bearing member |
| US8086150B2 (en) | 2005-11-02 | 2011-12-27 | Seiko Epson Corporation | Toner particle-bearing roller with projection portion, developing device having such toner particle-bearing roller, and image forming apparatus having such developing device |
| US8087170B2 (en) | 2005-11-17 | 2012-01-03 | Seiko Epson Corporation | Developing agent carrier manufacturing method, developing agent carrier, developing device and image forming apparatus |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5821772A (en) * | 1981-07-31 | 1983-02-08 | Konishiroku Photo Ind Co Ltd | Developing device for electrostatic latent image |
| JPS593459A (en) * | 1982-06-29 | 1984-01-10 | Canon Inc | Developing device |
-
1984
- 1984-12-21 JP JP26844184A patent/JPS61147264A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5821772A (en) * | 1981-07-31 | 1983-02-08 | Konishiroku Photo Ind Co Ltd | Developing device for electrostatic latent image |
| JPS593459A (en) * | 1982-06-29 | 1984-01-10 | Canon Inc | Developing device |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61166571A (en) * | 1985-01-18 | 1986-07-28 | Konishiroku Photo Ind Co Ltd | Developing device |
| JPS63135974A (en) * | 1986-11-27 | 1988-06-08 | Konica Corp | Developing device |
| JPS6394461U (en) * | 1986-12-09 | 1988-06-17 | ||
| JPH01114880A (en) * | 1987-10-28 | 1989-05-08 | Canon Inc | Developing device |
| US8401443B2 (en) | 2005-11-02 | 2013-03-19 | Seiko Epson Corporation | Toner-particle bearing roller, developing device, and image forming apparatus |
| US8086150B2 (en) | 2005-11-02 | 2011-12-27 | Seiko Epson Corporation | Toner particle-bearing roller with projection portion, developing device having such toner particle-bearing roller, and image forming apparatus having such developing device |
| JP2007127907A (en) * | 2005-11-04 | 2007-05-24 | Ricoh Co Ltd | Image forming apparatus |
| US7599650B2 (en) | 2005-11-04 | 2009-10-06 | Ricoh Company Limited | Developer bearing member, developing device, process cartridge and image forming apparatus |
| JP4628932B2 (en) * | 2005-11-04 | 2011-02-09 | 株式会社リコー | Image forming apparatus |
| JP2007140082A (en) * | 2005-11-17 | 2007-06-07 | Seiko Epson Corp | Method for manufacturing developer carrier, developer carrier, developing device, and image forming apparatus |
| JP2007140080A (en) * | 2005-11-17 | 2007-06-07 | Seiko Epson Corp | Method for manufacturing developer carrier, developer carrier, developing device, and image forming apparatus |
| JP2007140081A (en) * | 2005-11-17 | 2007-06-07 | Seiko Epson Corp | Method for manufacturing developer carrier, developer carrier, developing device, and image forming apparatus |
| US8087170B2 (en) | 2005-11-17 | 2012-01-03 | Seiko Epson Corporation | Developing agent carrier manufacturing method, developing agent carrier, developing device and image forming apparatus |
| JP2007178901A (en) * | 2005-12-28 | 2007-07-12 | Seiko Epson Corp | Developing device, and image forming apparatus and system |
| US8192339B2 (en) | 2006-11-07 | 2012-06-05 | Seiko Epson Corporation | Developing roller, manufacturing method thereof, developing apparatus and image forming apparatus |
| JP2008116852A (en) * | 2006-11-07 | 2008-05-22 | Seiko Epson Corp | Developing roller, its manufacturing method, developing device, and image forming apparatus |
| US8086152B2 (en) | 2007-05-30 | 2011-12-27 | Seiko Epson Corporation | Developing device, image forming apparatus, image forming system, developing method, and toner bearing member |
| JP2011064861A (en) * | 2009-09-16 | 2011-03-31 | Kyocera Mita Corp | Developing device and image forming apparatus comprising the same |
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