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JPS58157103A - Magnet roll - Google Patents

Magnet roll

Info

Publication number
JPS58157103A
JPS58157103A JP3991682A JP3991682A JPS58157103A JP S58157103 A JPS58157103 A JP S58157103A JP 3991682 A JP3991682 A JP 3991682A JP 3991682 A JP3991682 A JP 3991682A JP S58157103 A JPS58157103 A JP S58157103A
Authority
JP
Japan
Prior art keywords
magnets
magnet
holding layer
magnetic
magnetic force
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
Application number
JP3991682A
Other languages
Japanese (ja)
Other versions
JPS6131602B2 (en
Inventor
Kunio Okumura
奥村 邦夫
Atsuo Tanaka
田中 敦雄
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.)
Yamauchi Rubber Industry Co Ltd
Original Assignee
Yamauchi Rubber Industry Co Ltd
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 Yamauchi Rubber Industry Co Ltd filed Critical Yamauchi Rubber Industry Co Ltd
Priority to JP3991682A priority Critical patent/JPS58157103A/en
Priority to CA000400935A priority patent/CA1198766A/en
Priority to US06/368,998 priority patent/US4517719A/en
Priority to EP82103277A priority patent/EP0063377B1/en
Priority to DE8282103277T priority patent/DE3272271D1/en
Priority to DK175882A priority patent/DK156498C/en
Publication of JPS58157103A publication Critical patent/JPS58157103A/en
Priority to US06/692,681 priority patent/US4640808A/en
Publication of JPS6131602B2 publication Critical patent/JPS6131602B2/ja
Granted legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/06Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/09Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush
    • G03G15/0921Details concerning the magnetic brush roller structure, e.g. magnet configuration

Landscapes

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

Abstract

PURPOSE:To warrant better reproducibility by a construction wherein a plurality of magnets are held in a plastic holding layer of Shore 40 D hardness or more in a body and a recessed groove for absorbing distortion is formed in the holding layer other than what generates magnetic force. CONSTITUTION:Accuracy in fitting magnets 2, 3a-3e to a holding layer 4 is important and accordingly it should be avoided to use soft plastics for the holding layer 4. Since a plurality of magnets 2, 3a-3e are provided in parallel in such a manner that the polarity of each magnetic pole corresponds to the opposite pole of the counterpart, powerful attracting force always works and consequently, if an elastic material is used for the holding layer 4, the deformation produced will cause the setting position to change, giving a bad effect to reproducibility. Where the magnets 2, 3a-3e are held and fixed is the part generating magnetic force and the magnets are not provided in the part of the holding layer other than what generates the magnetic force and instead a recessed groove 5 for absorbing distortion is provided therein. This is intended to avoid a phenomenon in which the roll is curved by the difference of thermal distortion between the magnetic force generating part and that where the magnets are not provided, and a phenomenon of peeling off of the interfaces between the holding layer 4 and magnets 2, 3a-3e.

Description

【発明の詳細な説明】 この発明は、主として複写@、7アタシミリ。[Detailed description of the invention] This invention is mainly a copy @, 7th attachment.

プリンター勢の静電記録装置における磁気ブラシ現像に
使用されるマグネットロールに関する。
This invention relates to a magnet roll used for magnetic brush development in electrostatic recording devices of printers.

これら静電記録装置における磁気ブラシ現像は。Magnetic brush development in these electrostatic recording devices.

永久磁石な査するマグネットロールO外局に非磁性体ス
リーブを親御し、そのm面に磁性トナー轡の現曹剤を1
151保持させて磁気ブラシを形成し。
Place a non-magnetic sleeve on the outer part of the magnet roll O that is inspected by a permanent magnet, and apply one coat of magnetic toner to the m side of the non-magnetic sleeve.
151 to form a magnetic brush.

スリーブを感光体等に対し相対的に移動せしめることに
Lり、感光体等上に形成された静電潜像を摺擦してなさ
れる。
This is done by moving the sleeve relative to the photoreceptor, etc., and rubbing the electrostatic latent image formed on the photoreceptor, etc.

このような磁気ブラシ現像に使用されるマグネットロー
ルとしては、従来、ロール軸の周囲に数個の円板状の保
持フランジを@り付け、その保持フクンジの所定部分に
互いに異極となる複数個の棒状の焼結フェライト磁石体
を保持したマグネットロールが使用されている。
Conventionally, a magnet roll used for such magnetic brush development has several disc-shaped holding flanges attached around the roll axis, and a plurality of disc-shaped holding flanges with different polarities are attached to predetermined parts of the holding flanges. A magnet roll holding a rod-shaped sintered ferrite magnet is used.

しかしながら、この種のマグネットロールでは磁石体の
取り付は精度が要求されることから、その製造にあたっ
て特にロール軸への保持7クンジの敗9f”Jけ作業と
、その保持フランジへの磁石体の取り付は作業に著しく
手間を要し、また磁石の保持フランジへの接着剤による
固定が困離であり、全体の構造自体も複雑で、重たくて
取扱いづらく。
However, since this type of magnetic roll requires precision when attaching the magnet, in manufacturing it there is particular work involved in attaching the magnet to the roll shaft and attaching the magnet to the holding flange. Installation is extremely time-consuming, it is difficult to fix the magnet to the holding flange with adhesive, and the overall structure itself is complex, heavy, and difficult to handle.

しかも&価となる等の欠点を有していた。Moreover, it had drawbacks such as low price.

これらの欠点を改良すべく、実開昭66−16905号
等において様々な提案がなされたが1種々問題があった
In order to improve these shortcomings, various proposals have been made in Utility Model Application Publication No. 16905/1983, etc., but there are various problems.

一方、特開昭55−1055−1O05おイテ、ロール
軸の周囲に弾性体層を設け、さらにその周囲に磁性体層
を設けた磁気転写用ロールが提案されている。 この磁
気転写用ロールは磁気転写時に変形する必要があること
から、その弾性体層がスポンジの工うな軟質で弾力性の
′ある−ので構成されていた。 しかし、とのよ、うな
軟質弾性体層では、焼結磁石体のような磁石体を位置精
度を高く保って保持しえないと考えられる。
On the other hand, in JP-A-55-1055-1O05, a magnetic transfer roll has been proposed in which an elastic layer is provided around the roll shaft and a magnetic layer is further provided around the elastic layer. Since this magnetic transfer roll needs to be deformed during magnetic transfer, its elastic layer is made of a soft and elastic material such as sponge material. However, it is thought that such a soft elastic layer cannot hold a magnet such as a sintered magnet with high positional accuracy.

この発明の発勇者は、種々検討の結果、上記従来のロー
ルの欠点を一挙に解決しうるマグネットロールを開発す
ることに成功した。
As a result of various studies, the inventor of this invention succeeded in developing a magnetic roll that can solve all the drawbacks of the conventional rolls mentioned above.

すなわち、この発明によれば、ロール軸の周囲にショア
ーD硬940以上の合成樹脂製保持層が設けられ、その
保持層の所定部分に複数個の磁石体が保持層と一体的に
保持固設されて磁力発生部が構成され、かつその磁力発
生部以外の他の保持層部分に歪吸収用凹溝が形設されて
なるマグネットミールが提供される。
That is, according to the present invention, a synthetic resin retaining layer having a Shore D hardness of 940 or more is provided around the roll shaft, and a plurality of magnet bodies are held and fixed integrally with the retaining layer at predetermined portions of the retaining layer. A magnetic meal is provided in which a magnetic force generating section is formed by forming a magnetic force generating section, and strain absorbing grooves are formed in a portion of the holding layer other than the magnetic force generating section.

この発明のマグネットロールの一つの特徴は、[40以
上の合成樹脂層を介[2て行うことにあるが、これによ
シ従来に比べて製造が格段に容易になり、重量が軽量化
される効果がある。 ショアーD硬[40以上と限定し
たのは磁石体の!iitり付けfIIf上の観点からで
、これにエフ磁石体が安定に保持可能になる。
One of the features of the magnetic roll of the present invention is that it is made through 40 or more synthetic resin layers, which makes manufacturing much easier and lighter in weight than conventional methods. It has the effect of Shore D hardness [Limited to 40 or more is the magnetic body! From the viewpoint of attachment fIIf, the F magnet can be stably held there.

この発明のマグネットロールの他の一つの特徴は、磁石
体が@り付けられる磁カ発生部以外の保持層部分に歪吸
収用凹溝を形設したことにある。
Another feature of the magnet roll of the present invention is that strain absorbing grooves are formed in the holding layer portion other than the magnetic force generating portion to which the magnet body is attached.

磁石体の保持に関し、前述した特徴によって機械的安定
性が得られたが、この特徴に工って熱的安定性も得られ
ろことになる。
Regarding the holding of the magnet, mechanical stability was obtained by the above-mentioned feature, but thermal stability could also be obtained by utilizing this feature.

以下1図に示す実施的に基いて、さらにこの発明を詳説
する。
The present invention will be further explained in detail based on the embodiment shown in FIG.

a1図に示すIは、この発明のマグネットロールの一実
施鉤である。
I shown in Fig. a1 is an implementation hook of the magnetic roll of the present invention.

ロール軸(1) ti、アルミニウム、ステンレススチ
ール、合成樹脂等の非磁性体お工び鉄、パーマロイ、合
成樹脂とバリウムフェライトなどとの混合物等の磁性体
が使用される。 これらのうち、磁気回路の形成上すな
わち具体的にはハーミアンス保数の増大、ll洩磁束の
減少9着磁処通性の改善SOx点から磁性体の使用が好
ましい。 軸構造としては、中実、中空いずれでも工い
Roll shaft (1) A non-magnetic material such as Ti, aluminum, stainless steel, or synthetic resin, or a magnetic material such as permalloy, a mixture of synthetic resin and barium ferrite, etc. is used. Among these, it is preferable to use a magnetic material from the viewpoint of forming a magnetic circuit, specifically, from the viewpoint of increasing the harmeance coefficient, reducing leakage flux, improving magnetization permeability, and SOx. The shaft structure can be either solid or hollow.

保持層(4)としては、エポキシ樹脂、フェノール樹脂
、不飽和ポリエステル樹脂、メクニン樹脂、シリコン樹
脂、ジアリルフタレート樹脂等O熱硬化性樹脂、ポリエ
チレン、ポリ塩化ビニール、フッ素樹脂、アクリル樹脂
、ポリアミド樹脂、ポリスチレン、ポリカーボネート樹
脂等の熱可塑性樹脂、ポリウレタン及びこれらの発泡体
が使用される。
As the retaining layer (4), epoxy resin, phenol resin, unsaturated polyester resin, Mekunin resin, silicone resin, diallyl phthalate resin, etc., O thermosetting resin, polyethylene, polyvinyl chloride, fluororesin, acrylic resin, polyamide resin, Thermoplastic resins such as polystyrene and polycarbonate resins, polyurethane, and foams thereof are used.

これらの合成樹脂中のボリクレタンフオーム等の発泡体
を使用するとロールの軽量化の点で好適でToり1%K
RIMポリウレタンフォームによる保持層(4)の形成
が製造容易性等から最適で参る。
The use of foams such as polycrethane foam in these synthetic resins is suitable for reducing the weight of the roll, and the To
Formation of the retaining layer (4) using RIM polyurethane foam is optimal from the viewpoint of ease of manufacture.

合成樹脂発泡体の場合1発泡倍率はL2〜8.6倍の範
囲内で選択使用される。 発泡倍率が1.2倍未満では
合成樹脂量が大Kかり熱歪量が大きく、逆″yct6倍
なこえると空気層が多くなって強度上問題となる場合が
ある。 発泡倍率1.8〜2−6倍のものが特に強縦、
熱歪の点で好適である。
In the case of synthetic resin foam, the expansion ratio is selected within the range of L2 to 8.6 times. If the expansion ratio is less than 1.2 times, the amount of synthetic resin will be large and the amount of thermal distortion will be large. If the expansion ratio exceeds 6 times the reverse "yct", there will be a large number of air spaces, which may cause problems in terms of strength. Those with 2-6 times are especially strong and vertical.
This is preferable in terms of thermal distortion.

エポキシ樹脂、ポリエステル樹脂等を用い次場合には常
圧にて保持層(4)を形成できる点で有利である。
This is advantageous in that the retaining layer (4) can be formed using epoxy resin, polyester resin, etc. under normal pressure.

保持層(4)には磁石体(2)(8m)〜(8・)が保
持固設されるが、磁石体(2)(Jla)〜(8e)の
位置がズレると複写性能が変わる。 そこで保持層(4
)への磁石体(21(Jlm) 〜(Is)の*pmけ
111度が重要である。
Magnets (2) (8m) to (8.) are held and fixed in the retention layer (4), but if the positions of the magnets (2) (Jla) to (8e) are shifted, the copying performance changes. Therefore, the retention layer (4
) to the magnet body (21 (Jlm) to (Is) *pm minus 111 degrees is important.

この点において、保持層(4)の合成樹脂に軟質のtの
を使うことは避けるべきである。 普た複数個の磁石体
[21(8m)〜(8e)は磁力が強力な上に相互に異
極を対応させてlII接して並設されるものなので、そ
れらの間には常時強力な引力が働いている。
In this respect, the use of soft synthetic resin for the retaining layer (4) should be avoided. Usually, multiple magnets [21 (8m) to (8e) have strong magnetic force and are arranged side by side in contact with each other with different polarities, so there is always a strong attraction between them. is working.

そこで保持層(4)に弾性に富む材料を用いると1次a
!に1g+記引力により変形が生じ、磁石体(z+ts
a)〜(8e)の取p付は位置が変わるので現像剤の吸
着特性が変わ夕複写性能に悪影響を及ばず。 このmA
から、保持層(4)の合成樹脂材料には変形しやすい弾
性材料は使用すべきではなく、ショアーDii![40
以上の硬度を有する材料を使用すべきである。
Therefore, if a highly elastic material is used for the retaining layer (4), the primary a
! Deformation occurs due to an attractive force of 1g+, and the magnetic body (z+ts
Since the mounting positions in a) to (8e) are changed, the adsorption characteristics of the developer are changed and the copying performance is not adversely affected. This mA
Therefore, elastic materials that are easily deformed should not be used as the synthetic resin material of the retaining layer (4), and Shore Dii! [40
Materials with a hardness higher than or equal to the hardness should be used.

磁石体(21(Im ) 〜’(8e ) Kは、磁性
トナー勢の現像剤の吸着用磁石体(2)および現像剤保
持用の磁石体(8a)〜(8・)がある。 現像剤吸着
用磁石体(2)としては、磁力の強い棒状の焼結フェラ
イト磁石、アルニコ磁石、希土類磁石等が使用される。
The magnet bodies (21 (Im) to '(8e) K include a magnet body (2) for attracting a magnetic toner-based developer and a magnet body (8a) to (8.) for holding a developer. Developer As the attracting magnet (2), a rod-shaped sintered ferrite magnet, an alnico magnet, a rare earth magnet, etc. with strong magnetic force is used.

 なお、必要ならば、この磁石体(りOff’面に磁気
回路を構成するための磁性体エタなるキーパ−を設置し
てもよい。 また磁性トナー等の現像剤保持用磁石体(
8a)〜(8e)としては、前記現像剤吸着用磁石体(
21と同様の棒状又は板状7工クイト磁石(シート状ゴ
ム磁石等を含む)などが使用される。
If necessary, a keeper called a magnetic material for forming a magnetic circuit may be installed on the Off' side of this magnet body.
8a) to (8e) include the developer adsorption magnet (
A rod-shaped or plate-shaped 7-piece magnet (including sheet-shaped rubber magnets, etc.) similar to No. 21 is used.

なお、棒状又は板状磁石体は、長尺物の使用が好適であ
るが、蚤丁れば短尺物を接着剤にて接着一体化しても1
い。 この場合には、短尺物量の磁力の低下を防ぐため
、この短尺物一体磁石Oamにシート状ゴム磁石轡を装
置してもよい。
Note that it is preferable to use long rod-shaped or plate-shaped magnets, but in the case of flea knives, even if short pieces are glued together with adhesive, it will not work.
stomach. In this case, in order to prevent the magnetic force of the short object from decreasing, a sheet-like rubber magnet holder may be installed on the short object integrated magnet Oam.

上記磁石体(21(8m )〜(I・)tI&一般され
る保持層(4)の所定部分とは、保持層(4)の全局で
はなく、一部のjIi面である。 この一部の周面内に
おいて、磁性トナー等の現像剤t−吸着しかつ均一に保
持するのに必要な配置で、磁石体(21(8a )〜(
8e)が保持層(4)K一体的に保持固設される。 配
置は、当該分野で知られた磁石体配置を適宜利用するこ
とができる。
The above-mentioned magnet body (21 (8 m ) to (I・)tI & the general predetermined portion of the retention layer (4) is not the whole of the retention layer (4) but a part of the jIi plane. Within the circumferential surface, magnet bodies (21 (8a) to (
8e) is held and fixed integrally with the holding layer (4)K. For the arrangement, any magnet arrangement known in the art can be used as appropriate.

磁石体(21(Im)〜(1・)が保持固設され九部分
は磁力発生部となり、磁性トナー等を吸着・保持する部
分となる。
The magnet bodies (21 (Im) to (1.) are held and fixed, and the 9th part becomes a magnetic force generating part, and becomes a part that attracts and holds magnetic toner and the like.

一方、磁力発生部以外の他の保持層部分には磁石体が設
けられず、かわ夕に歪吸収用の凹@(51が設けられる
。 磁石体を設けないのけ、現像て使用されなかった残
余の磁性トナー等を(ハ)収するのに磁力が不要だから
である。 歪吸収用の凹Wa(51を設けるのは、磁石
体(21(ll&)〜(8c)が固設されている磁力発
生部と磁石体が設けられないこの部分との間の熱歪の差
異でロールが湾曲する現像。
On the other hand, no magnets were provided in the other parts of the holding layer other than the magnetic force generating part, and instead, concave holes (51) for strain absorption were provided. This is because magnetic force is not required to collect the remaining magnetic toner, etc. The concave Wa (51) for strain absorption is provided because the magnet bodies (21(ll&) to (8c) are fixedly installed). Development in which the roll curves due to the difference in thermal distortion between the magnetic force generating part and this part where no magnet is provided.

保持層(4)と磁石体(2)(al)〜(8e)の界面
が剥離する現象等を防ぐためである。
This is to prevent a phenomenon in which the interface between the retaining layer (4) and the magnet bodies (2) (al) to (8e) peels off.

凹#I(&)の形状1幅、深さなどは、本発明の用途。The shape 1 width, depth, etc. of the concave #I (&) are used in the present invention.

ロール径、保持層(4)の厚み等にエフ決定されるが。It is determined by the roll diameter, the thickness of the retaining layer (4), etc.

例示すれば底の浅い断ff1U字形の軸方向に沿りた溝
が挙けられる。 りまり後述する実施例で示される凹溝
の形状1幅、深さを適宜変更したtのが挙げられる。 
しかし、これに限定されず、要するに保持層(4)の合
成樹脂と磁石体(通常焼結磁石体) (2) (IIm
)〜(lie)間C))まり異種材料量の熱変形の差異
を吸収しうる形状、帳、深さであればよい。
An example is a shallow ff1U-shaped groove along the axial direction. An example of the shape of the concave groove shown in an embodiment described later is 1, in which the width and depth are changed as appropriate.
However, the present invention is not limited to this, and in short, the synthetic resin of the retention layer (4) and the magnet (usually a sintered magnet) (2) (IIm
) to (lie) C)) It is sufficient if the shape, thickness, and depth can absorb the difference in thermal deformation between different amounts of materials.

凹溝(5)は通常1個であるが、複数個設けてt工いO なお、この発明のマグネットロールを磁気ブラシ現*に
使用する場合Kt1.アルミニウム、ステンレススチー
ル等の材料からなる非磁性体スリーブが、マグネットロ
ールの外周に同心に装着される。
Although there is usually one groove (5), it is possible to provide a plurality of grooves (5). Note that when the magnet roll of the present invention is used as a magnetic brush generator, Kt1. A non-magnetic sleeve made of a material such as aluminum or stainless steel is attached concentrically to the outer periphery of the magnet roll.

この発明のマグネットロールは、以上の説明から理解さ
れるように、複数個の磁石体がロール軸の所定部分にシ
ョアーDi1140以上の合成樹脂屑で一体に強固に保
持され、かつ前記所定部分以外の部分の合成樹脂層に熱
歪吸収用の凹溝が形成されてなるものであるから、従来
の円板状保持フランジを用いる場合に比べて製造が格段
に容易になり軽量・安価になると共に、広い温度範囲(
たとえば−26℃〜+70℃)での使用に耐えうる工う
になる。 換言すれば、広い温度範囲でロール自体にそ
りが発生せず、湾曲しないロールとすることが出来る。
As can be understood from the above description, the magnetic roll of the present invention has a plurality of magnet bodies firmly held together at a predetermined portion of the roll shaft with synthetic resin scraps having a Shore Di of 1140 or higher, and Since grooves for absorbing thermal strain are formed in the synthetic resin layer of the parts, manufacturing is much easier, lighter and cheaper than when using conventional disk-shaped holding flanges, and Wide temperature range (
For example, it can withstand use at temperatures ranging from -26°C to +70°C. In other words, the roll itself does not warp or curve over a wide temperature range.

 従って、たとえば磁気ブラシ現像に使用した場合、ロ
ール外周に同心に装着される非磁性体スリーブとのギャ
ップを可及的に小さくし得るので、スリーブ馬面の磁力
の均一性ひいては喪好な複写性能を保証し得る。
Therefore, when used for magnetic brush development, for example, the gap between the non-magnetic sleeve and the non-magnetic sleeve installed concentrically around the roll can be made as small as possible, which improves the uniformity of the magnetic force on the sleeve surface and improves poor copying performance. I can guarantee it.

実施1lii11 本実施例は、諷1図〜纂8図に示される構造で、ロール
軸(υと、磁性トナー吸着用の異方性棒状磁石体(2)
と、磁性トナー保持用の異方性棒状磁石体(8m)(8
b)(!Ic)(lld)(8e)と、これらを強固に
保持一体化する保持層(4)エフ構成され、前記保持用
磁石体(8a)から(8・)までの間の部分で磁力発生
部が構成され、磁石体のない馬面部分に鷹の浅いU字形
溝(5)が形成されている。 1にお、161はスライ
ダーである。
Embodiment 1lii11 This embodiment has the structure shown in Figs.
and an anisotropic bar magnet (8 m) for holding magnetic toner (8 m).
b) (!Ic) (lld) (8e) and a retaining layer (4) that firmly holds and integrates them, and is composed of the retaining magnet (8a) to (8・). A magnetic force generating section is constructed, and a shallow U-shaped groove (5) is formed in the horse's surface area where there is no magnet body. 1, 161 is a slider.

このようなマグネットロール(7)の外周には、表面が
粗面化され、かつ一端に1転軸+91を有し他端にキャ
ップ(2)を有する非磁性体製スリーブ(8)が同心に
!i着され、磁気ブフシ現僚用ロール■が得られる。 
各素材および寸法は次のようである。
Concentrically on the outer periphery of such a magnet roll (7) is a sleeve (8) made of a non-magnetic material with a roughened surface and having one rotational axis +91 at one end and a cap (2) at the other end. ! 1, and a magnetic roll (2) for current use is obtained.
The materials and dimensions are as follows.

ロール軸(1)二  鉄 直径smx長さ88481 磁石体(2):  焼結磁石 1 !WX 1 !霧X ! II !g磁石体(8b
)(8c) :  焼結磁石6腸×6腸刈■!閤 磁石体(8m)(lid)(as) :  ゴム磁石8
swXIImX!I!m 保持層(4) :  RI M発泡ポリウレタン(発泡
倍率1s倍) 外径47m×長さ2g2m 凹溝(5):  断面U字形 幅28■×深さ8.6■×長さ293■
Roll shaft (1) 2 Iron diameter sm x length 88481 Magnet body (2): Sintered magnet 1! WX1! Fog X! II! g Magnet (8b
) (8c): Sintered magnet 6 pieces x 6 pieces ■! Magnet body (8m) (lid) (as): Rubber magnet 8
swXIImX! I! m Retaining layer (4): RI M polyurethane foam (foaming ratio 1s times) Outer diameter 47m x length 2g2m Concave groove (5): U-shaped cross section width 28 x depth 8.6 x length 293

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

SXSは、この発明のマグネットロールを含む磁気ブラ
シ現像用ロールの線部破断斜視図、纂2図は同縦断面図
、gi図は、纂1図に示す磁気ブラシ現像用ロールの非
磁性体スリーブの斜視図である。 (1)・−・ロール軸、(2)・・・磁性トナー吸着用
異方性棒状磁石体、 (1m)〜(Ic)・・・磁性ト
ナー保持用異方性棒状磁石体、(4)・−・保持層、(
5)・・・凹溝、(7)・・・マグネットロール。
SXS is a cutaway perspective view of a magnetic brush developing roll including the magnet roll of the present invention, Figure 2 is a vertical sectional view thereof, and Figure gi is a non-magnetic sleeve of the magnetic brush developing roll shown in Figure 1. FIG. (1)...Roll shaft, (2)...Anisotropic bar-shaped magnet for magnetic toner adsorption, (1m)-(Ic)...Anisotropic bar-shaped magnet for holding magnetic toner, (4)・−・Retention layer, (
5)... Concave groove, (7)... Magnet roll.

Claims (1)

【特許請求の範囲】[Claims] L ロール軸のjiI囲にショアーD硬度40以上の合
成樹脂製保持層が設けられ、その保持層の所定部分に複
数個の磁石体が保持層と一体的に保持固設されて磁力発
生部が構成され、かつその磁力発生部以外の他の保持層
部分に歪吸収用凹溝が形設されてなるiグネットロール
A retaining layer made of synthetic resin having a Shore D hardness of 40 or more is provided around the jiI of the L roll shaft, and a plurality of magnet bodies are held and fixed integrally with the retaining layer at predetermined portions of the retaining layer to form a magnetic force generating section. 1. An i-gnet roll in which strain-absorbing grooves are formed in a holding layer portion other than the magnetic force generating portion.
JP3991682A 1981-04-20 1982-03-12 Magnet roll Granted JPS58157103A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP3991682A JPS58157103A (en) 1982-03-12 1982-03-12 Magnet roll
CA000400935A CA1198766A (en) 1981-04-20 1982-04-14 Magnetic rolls and a method of making the same
US06/368,998 US4517719A (en) 1981-04-20 1982-04-16 Magnetic rolls for electrostatic recording devices
EP82103277A EP0063377B1 (en) 1981-04-20 1982-04-19 Magnetic rolls and a method of making the same
DE8282103277T DE3272271D1 (en) 1981-04-20 1982-04-19 Magnetic rolls and a method of making the same
DK175882A DK156498C (en) 1981-04-20 1982-04-20 MAGNETIC ROLL FOR AN ELECTROSTATIC REPRESENTATION SYSTEM
US06/692,681 US4640808A (en) 1981-04-20 1985-01-18 Method for making magnetic rolls

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3991682A JPS58157103A (en) 1982-03-12 1982-03-12 Magnet roll

Publications (2)

Publication Number Publication Date
JPS58157103A true JPS58157103A (en) 1983-09-19
JPS6131602B2 JPS6131602B2 (en) 1986-07-21

Family

ID=12566255

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3991682A Granted JPS58157103A (en) 1981-04-20 1982-03-12 Magnet roll

Country Status (1)

Country Link
JP (1) JPS58157103A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2630934A1 (en) * 1988-08-17 1989-11-10 Clark Maurice Device for the mechanical cleaning of bundles of tubes employing a magnetic field

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01252303A (en) * 1988-03-30 1989-10-09 Mitsubishi Heavy Ind Ltd Cutting tool tip

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2630934A1 (en) * 1988-08-17 1989-11-10 Clark Maurice Device for the mechanical cleaning of bundles of tubes employing a magnetic field

Also Published As

Publication number Publication date
JPS6131602B2 (en) 1986-07-21

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