JP2766790B2 - Raw material supply device in airflow classifier - Google Patents
Raw material supply device in airflow classifierInfo
- Publication number
- JP2766790B2 JP2766790B2 JP7215713A JP21571395A JP2766790B2 JP 2766790 B2 JP2766790 B2 JP 2766790B2 JP 7215713 A JP7215713 A JP 7215713A JP 21571395 A JP21571395 A JP 21571395A JP 2766790 B2 JP2766790 B2 JP 2766790B2
- Authority
- JP
- Japan
- Prior art keywords
- raw material
- material supply
- classifying
- classification
- chamber
- 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 - Lifetime
Links
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- Combined Means For Separation Of Solids (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】この発明は、粉体原料を高速
度で旋回して微粉と粗粉に遠心分離する気流分級機の原
料供給装置に関するものである。
【０００２】
【従来の技術】本体ケーシング内に分級室を設け、その
分級室内に粉体原料を供給し、その粉体原料を分級室内
で旋回させて粗粉と微粉とに遠心分離する気流分級機は
従来から知られている。
【０００３】上記のような気流分級機の分級室に対する
粉体原料の供給には、特開昭６１−９３８８０号公報、
および実開昭６２−７９５８２号公報に記載されている
ように、分級室内に粉体原料を直接噴射する方法が存在
する。
【０００４】しかし、上記の原料供給方法においては、
分級室の外周一部から粉体原料を供給するため、分級室
における旋回気流に乱れが生じ、分級精度に悪影響をお
よぼすという問題がある。また、分級室の外周一部から
の供給であるため、分級室における原料の分布が不均一
になり易く、効率よく分級することができないという問
題もある。
【０００５】特公昭５６−２０９１３号公報には、本願
の図３に示す原料供給装置が記載されている。この原料
供給装置は、本体ケーシング２０の上部に原料供給筒２
５を接続し、その原料供給筒２５の外周上部に接続した
原料流出筒２６から原料供給筒２５内に原料を供給して
旋回させ、原料供給筒２５の内径面に沿って下方向に移
動する原料をその原料供給筒２５内の下部外周囲に形成
した環状の供給孔２７から分級室２１内に流入させるよ
うにしている。
【０００６】ここで、分級室２１内に供給された原料
は、その分級室２１内で旋回して粗粉と微粉とに遠心分
離され、粗粉は、分級板２２の外周の粗粉排出口２３か
ら排出され、微粉は分級板２２の中央に接続した微粉排
出パイプ２４から排出される。
【０００７】図３に示すように、原料供給筒２５内で原
料を旋回させ乍ら、環状の供給孔２７から分級室２１内
に原料を供給することより、供給原料の旋回流と分級室
２１内における旋回流とが同じ向きであるため、分級室
２１内における旋回流に乱れを生じさせることが殆んど
なく、分級室に原料を直接供給する場合に比較して、原
料を高精度に分級することができるという特徴を有す
る。
【０００８】
【発明が解決しようとする課題】ところで、図３に示す
原料供給装置においては、原料と空気の混合流が原料供
給装置の一箇所から取り入れられる構成であるため、原
料供給筒２５内における原料の旋回速度が遅くなり、原
料供給筒２５内の下部において粉体原料が凝集し易く、
原料供給孔の一部から固まりの状態で分級室２１に流入
することが多い。このため、分級室における分布が不均
一になり、原料を効率よく分級処理することができない
という不都合がある。
【０００９】また、付着性の強い原料の場合には、原料
供給筒２５内の下部において付着し、連続運転すること
ができないという不都合もある。
【００１０】
【発明の課題】この発明の課題は、上記の不都合を解消
し、分級室に粉体原料を原料供給孔の全周から分散供給
することができるようにして分級精度および処理能力の
向上を図り、付着性の強い原料でも、連続的に分級処理
することができるようにした原料供給装置を提供するこ
とである。
【００１１】
【課題を解決するための手段】上記の課題を解決するた
めに、この発明においては、上部が開口する本体ケーシ
ング１内に円錐形の分級カバー４と、その下方に円錐形
の分級板６を設けて両者間に分級室７を形成し、本体ケ
ーシング１の上部に端板１３を有する原料供給筒１２を
接続し、その原料供給筒１２の上部から原料供給筒１２
内の外周接線方向に向けて原料を供給し、上記原料供給
筒１２内を旋回し乍ら下降する原料を前記分級カバー４
の外周囲に形成された環状の原料供給孔５から分級室７
に旋回流入させて粗粉と微粉とに遠心分離する気流分級
機の原料供給装置において、前記原料供給筒１２の上部
円周上に原料の旋回方向に傾斜する複数の案内羽根１５
を所要の間隔をおいて設けて隣接する案内羽根１５間に
外部と原料供給筒１２内とを連通させる二次空気流入路
１６を形成し、その二次空気流入路１６に高圧エアと共
に原料を原料供給筒１２内に噴射するエア噴射ノズル１
７を挿入した構成を採用している。
【００１２】上記の構成を採用したことにより、エア噴
射ノズル１７から原料供給筒１２内に原料を噴射する
と、その原料は、案内羽根１５に対する衝突と、案内羽
根１５間の二次空気流入路１６から流入する二次空気に
よって分散されると共に、その二次空気によって旋回速
度が高められる。このため、原料が原料供給筒１２内の
下部において凝集するのを防止することができると共
に、原料の旋回流の傾むきが小さくなるので、原料を環
状の原料供給孔５の全体から分級室７内に均一に分散供
給することができる。さらに、二次空気の導入によって
原料の旋回速度が上がるので、原料供給筒で供給時に凝
集していた原料が分散されて、分散状態のままで原料供
給孔に供給することができる。
【００１３】
【発明の実施の形態】以下、この発明の実施の形態を図
１及び図２に基づいて説明する。
【００１４】図示のように本体ケーシング１は、上部ケ
ーシング２と下部ケーシング３とから成り、上部ケーシ
ング２の内側には円錐形の分級カバー４が設けられ、そ
の分級カバー４の外周と上部ケーシング２の内周間に環
状の原料供給孔５が形成されている。
【００１５】また、分級カバー４の下方には、その分級
カバー４との間に分級室７を形成する円錐形の分級板６
が設けられ、この分級板６の外縁部とケーシング１の内
周間に環状の粗粉排出孔８が設けられている。
【００１６】分級板６の中央部には微粉排出筒９が接続
されている。微粉排出筒９はＬ形をなし、その端部は下
部ケーシング３を貫通して外部に臨んでいる。
【００１７】上部ケーシング２と下部ケーシング３との
間に複数の案内羽根１０が等間隔に環状に配置されてい
る。この案内羽根１０は、分級室７内において旋回する
原料の旋回方向に傾斜し、隣接する案内羽根１０間に形
成された二次空気流入路１１によって外部と分級室７内
が連通されている。
【００１８】前記上部ケーシング２の上部には原料供給
筒１２が接続され、その原料供給筒１２の上部端板１３
の中心部に排気筒１４が接続されている。
【００１９】原料供給筒１２は、上下に分割され、その
分割面間に複数の案内羽根１５が等間隔に環状に配置さ
れている。案内羽根１５は、原料供給筒１２内において
旋回する原料の旋回方向に傾斜し、隣接する案内羽根１
５間の二次空気流入路１６によって外部と原料供給筒１
２の内部が連通されている。
【００２０】二次空気流入路１６には、原料供給筒１２
の内部接線方向に向けて高圧エアを噴射するエア噴射ノ
ズル１７の先端部が挿入されている。このエア噴射ノズ
ル１７内のエア通路に原料ホッパ１８の下部出口が接続
され、エア噴射ノズル１７に高圧エアを供給すると、ノ
ズル１７内を流動する高圧エアによって原料ホッパ１８
の内部の原料がノズル１７の内部に吸引され、ノズル１
７の先端から原料供給筒１２の内部に噴射される。
【００２１】実施の形態で示す気流分級機の原料供給装
置は上記の構造から成り、粉体原料の分級に際しては、
微粉排出筒９および排気筒１４に吸引力を付与し、その
状態において、エア噴射ノズル１７から原料供給筒１２
の内部に粉体原料を供給する。
【００２２】いま、エア噴射ノズル１７に高圧エアを供
給して原料供給筒１２内に粉体原料を供給すると、上記
粉体原料は、案内羽根１５に対する衝突と、二次空気流
入路１６から原料供給筒１２内に流入する二次空気によ
って分散されると共に、上記二次空気によって旋回速度
が高められる。
【００２３】このため、原料は分散状態で原料供給筒１
２の内部を高速度で旋回し乍ら下降すると共に、その旋
回流の傾きは小さく、分級カバー４の外周に設けられた
粉体供給孔５の全体から均等に分級室７内に流入する。
【００２４】上記の原料は、分級室７内において旋回
し、このとき、分級室７のまわりの二次空気流入路１１
から外部のエアが分級室７内に流入するため、原料は高
速旋回して粗粉と微粉とに遠心分離され、粗粉は粗粉排
出孔８から下部ケーシング３に排出され、微粉は微粉排
出筒９から取り出される。
【００２５】
【発明の効果】以上のように、この発明は、原料供給筒
の上部円周上に複数の案内羽根を設け、隣接する案内羽
根間の二次空気流入路に高圧エアと共に原料を原料供給
筒内に噴射するエア噴射ノズルを設けたことにより、そ
のエア噴射ノズルから噴射された原料は案内羽根に対す
る衝突と、二次空気流入路から流入する二次空気とによ
ってきわめて効果的に分散させることができると共に、
上記二次空気によって原料の旋回速度を高めることがで
きる。その原料の旋回速度の高速化に伴って旋回流の傾
きが小さくなり、その結果、分散状態の原料を原料供給
孔の全体から分級室内に均等に導入することができ、分
級精度および処理能力の向上を図ることができる。
【００２６】また、付着性の強い原料でも分級室にスム
ーズに流入させることができ、連続運転が可能である。
【００２７】さらに、二次空気の流入により、原料の旋
回速度を高くすることができるため、分級点を微粉側に
設定することができる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a raw material supply device of an air flow classifier for rotating a powder raw material at a high speed and centrifuging the powder raw material into fine powder and coarse powder. . [0002] A classifying chamber is provided in a main body casing, a powder material is supplied into the classifying chamber, and the powder material is swirled in the classifying chamber and centrifugally separated into coarse powder and fine powder. Machines are conventionally known. [0003] Japanese Patent Application Laid-Open No. 61-93880 discloses a method for supplying a powdery raw material to a classifying chamber of an airflow classifier as described above.
Also, as described in Japanese Utility Model Application Laid-Open No. 62-79582, there is a method of directly injecting a powder raw material into a classification chamber. However, in the above raw material supply method,
Since the powder raw material is supplied from a part of the outer periphery of the classifying chamber, there is a problem that a turbulence occurs in the swirling airflow in the classifying chamber, which adversely affects the classification accuracy. In addition, since the supply is performed from a part of the outer periphery of the classifying chamber, the distribution of the raw materials in the classifying chamber tends to be uneven, and there is a problem that the classification cannot be performed efficiently. Japanese Patent Publication No. Sho 56-20913 discloses a raw material supply apparatus shown in FIG. 3 of the present application. This raw material supply device includes a raw material supply cylinder 2
5 is connected, the raw material is supplied into the raw material supply tube 25 from the raw material outflow tube 26 connected to the upper part of the outer periphery of the raw material supply tube 25, and the raw material is turned and moved downward along the inner diameter surface of the raw material supply tube 25. The raw material is caused to flow into the classifying chamber 21 from an annular supply hole 27 formed around the lower outside of the raw material supply cylinder 25. [0006] Here, the raw material supplied into the classifying chamber 21 is swirled in the classifying chamber 21 and centrifuged into coarse powder and fine powder. The fine powder is discharged from the fine powder discharge pipe 24 connected to the center of the classification plate 22. As shown in FIG. 3, while the raw material is swirled in the raw material supply tube 25, the raw material is supplied from the annular supply hole 27 into the classifying chamber 21 so that the swirling flow of the raw material and the classification chamber 21 Since the swirling flow in the chamber is in the same direction, the swirling flow in the classifying chamber 21 is hardly disturbed, and the raw material can be supplied with higher precision than when the raw material is directly supplied to the classifying chamber. It has the feature that it can be classified. In the raw material supply device shown in FIG. 3, since the mixed flow of the raw material and the air is taken in from one place of the raw material supply device, the raw material supply tube 25 The turning speed of the raw material at the time becomes slow, and the powder raw material easily aggregates at the lower part in the raw material supply cylinder 25,
It often flows into the classification chamber 21 in a lump from a part of the raw material supply holes. For this reason, the distribution in the classification chamber becomes uneven, and there is a disadvantage that the raw material cannot be efficiently classified. Further, in the case of a raw material having a high adhesiveness, there is a disadvantage that the raw material adheres to a lower portion in the raw material supply tube 25 and cannot be continuously operated. SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned inconveniences and to improve the classification accuracy and the processing capacity by enabling the powder material to be dispersed and supplied to the classification chamber from all around the raw material supply hole. It is an object of the present invention to provide a raw material supply apparatus which can improve the quality and can continuously classify even a raw material having strong adhesion. In order to solve the above-mentioned problems, according to the present invention, a conical classification cover 4 is provided in a main body casing 1 having an open upper portion, and a conical classification cover is provided below the conical classification cover. A plate 6 is provided, a classifying chamber 7 is formed therebetween, and a raw material supply tube 12 having an end plate 13 is connected to an upper portion of the main body casing 1.
The raw material is supplied in a direction tangential to the outer circumference of the inside, and the raw material which descends while rotating inside the raw material supply cylinder 12 is classified into the classification cover 4.
From the annular raw material supply hole 5 formed around the outside of the
In a raw material supply device of an air flow classifier which is swirled into a raw material and centrifuged into coarse powder and fine powder, a plurality of guide vanes 15 inclined in a swirling direction of the raw material on an upper circumference of the raw material supply cylinder 12 are provided.
Are formed at required intervals to form a secondary air inflow passage 16 between the adjacent guide vanes 15 for communicating the outside with the inside of the raw material supply cylinder 12, and the secondary air inflow passage 16 is shared with high-pressure air.
Injection nozzle 1 for injecting raw material into raw material supply cylinder 12
7 is inserted . By adopting the above configuration, the air injection
The raw material is injected from the injection nozzle 17 into the raw material supply cylinder 12.
And the raw material is subjected to a collision with the guide blade 15 and the guide blade.
To the secondary air flowing from the secondary air inflow passage 16 between the roots 15
Therefore, while being dispersed, the swirling speed is
The degree is raised. Therefore, the raw material can be prevented from aggregating at the lower part of the material supply tube 12, the inclination direction of the raw material of the swirling flow becomes smaller, classification chamber raw material from the whole of the annular material feed holes 5 7 Can be uniformly dispersed and supplied. Further, since the rotation speed of the raw material is increased by the introduction of the secondary air, the raw material that has been aggregated at the time of supply in the raw material supply cylinder is dispersed, and the raw material can be supplied to the raw material supply hole in a dispersed state. An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. As shown in the figure, the main casing 1 comprises an upper casing 2 and a lower casing 3. A conical classifying cover 4 is provided inside the upper casing 2, and an outer periphery of the classifying cover 4 and the upper casing 2 are provided. An annular raw material supply hole 5 is formed between the inner circumferences. Below the classifying cover 4, a conical classifying plate 6 forming a classifying chamber 7 with the classifying cover 4 is provided.
And an annular coarse powder discharge hole 8 is provided between the outer edge of the classifying plate 6 and the inner periphery of the casing 1. A fine powder discharge cylinder 9 is connected to the center of the classifying plate 6. The fine powder discharge cylinder 9 has an L shape, and its end portion penetrates the lower casing 3 and faces the outside. A plurality of guide vanes 10 are annularly arranged at regular intervals between the upper casing 2 and the lower casing 3. The guide vanes 10 are inclined in the swirling direction of the raw material swirling in the classifying chamber 7, and the outside and the inside of the classifying chamber 7 are communicated with each other by a secondary air inflow path 11 formed between the adjacent guide vanes 10. A raw material supply tube 12 is connected to an upper portion of the upper casing 2, and an upper end plate 13 of the raw material supply tube 12 is provided.
The exhaust pipe 14 is connected to the center of the exhaust pipe. The raw material supply cylinder 12 is divided into upper and lower parts, and a plurality of guide blades 15 are annularly arranged at equal intervals between the divided surfaces. The guide vanes 15 are inclined in the swirling direction of the raw material swirling in the raw material supply tube 12, and are adjacent to the guide vanes 1.
Between the outside and the raw material supply cylinder 1 through the secondary air inflow passage 16 between
The inside of 2 is communicated. The secondary air inflow passage 16 is provided with the raw material supply cylinder 12.
The tip of an air injection nozzle 17 that injects high-pressure air in the tangential direction inside is inserted. The lower outlet of the raw material hopper 18 is connected to an air passage in the air injection nozzle 17. When high-pressure air is supplied to the air injection nozzle 17, the high-pressure air flowing through the nozzle 17 causes the raw material hopper 18 to flow.
Is sucked into the nozzle 17 and the nozzle 1
7 is injected into the raw material supply cylinder 12. The raw material supply device of the airflow classifier shown in the embodiment has the above-described structure.
A suction force is applied to the fine powder discharge cylinder 9 and the exhaust cylinder 14, and in that state, the air supply nozzle 17
Supply the powder raw material inside. When the high-pressure air is supplied to the air injection nozzle 17 to supply the powder raw material into the raw material supply cylinder 12, the powder raw material collides against the guide blades 15 and the secondary air flow.
The secondary air flowing into the raw material supply cylinder 12 from the inlet 16
And the swirl speed by the secondary air.
Is enhanced. For this reason, the raw materials are dispersed in the raw material supply cylinder 1.
2 while rotating at a high speed, the inclination of the swirling flow is small, and the powder flows uniformly into the classifying chamber 7 from the entire powder supply hole 5 provided on the outer periphery of the classifying cover 4. The above-mentioned raw material is swirled in the classification chamber 7, and at this time, the secondary air inflow passage 11 around the classification chamber 7 is formed.
From outside, the raw material turns into the classification chamber 7 at a high speed, and the raw material is centrifuged into coarse powder and fine powder, and the coarse powder is discharged from the coarse powder discharge hole 8 to the lower casing 3, and the fine powder is discharged as fine powder. It is taken out of the cylinder 9. As described above, according to the present invention, a plurality of guide blades are provided on the upper circumference of the raw material supply cylinder, and the raw material is supplied together with the high-pressure air to the secondary air inflow passage between the adjacent guide blades. Raw material supply
By providing an air injection nozzle that injects it into the cylinder,
The raw material injected from the air injection nozzle of the
Collision and secondary air flowing from the secondary air inflow channel
Can be dispersed very effectively
The secondary air can increase the turning speed of the raw material.
Wear. As the rotation speed of the raw material increases, the inclination of the swirling flow decreases, and as a result, the raw material in a dispersed state can be uniformly introduced from the entire raw material supply holes into the classification chamber, and the classification accuracy and the processing capacity can be improved. Improvement can be achieved. Further, even a highly adherent raw material can flow smoothly into the classification chamber, and continuous operation is possible. Furthermore, since the swirling speed of the raw material can be increased by the inflow of the secondary air, the classification point can be set to the fine powder side.
【図面の簡単な説明】
【図１】この発明に係る原料供給装置の実施の形態を示
す縦断正面図
【図２】図１の原料供給筒の横断平面図
【図３】従来の原料供給装置を示す縦断正面図
【符号の説明】
１ 本体ケーシング
４ 分級カバー
５ 原料供給孔
６ 分級板
７ 分級室
１２ 原料供給筒
１３ 端板
１５ 案内羽根
１６ 二次空気流入路BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional front view showing an embodiment of a raw material supply apparatus according to the present invention. FIG. 2 is a cross-sectional plan view of a raw material supply cylinder of FIG. 1 FIG. [Description of Signs] 1 Body casing 4 Classification cover 5 Material supply hole 6 Classification plate 7 Classification chamber 12 Material supply cylinder 13 End plate 15 Guide vane 16 Secondary air inflow path
Claims (1)
級カバー４と、その下方に円錐形の分級板６を設けて両
者間に分級室７を形成し、本体ケーシング１の上部に端
板１３を有する原料供給筒１２を接続し、その原料供給
筒１２の上部から原料供給筒１２内の外周接線方向に向
けて原料を供給し、上記原料供給筒１２内を旋回し乍ら
下降する原料を前記分級カバー４の外周囲に形成された
環状の原料供給孔５から分級室７に旋回流入させて粗粉
と微粉とに遠心分離する気流分級機の原料供給装置にお
いて、前記原料供給筒１２の上部円周上に原料の旋回方
向に傾斜する複数の案内羽根１５を所要の間隔をおいて
設けて隣接する案内羽根１５間に外部と原料供給筒１２
内とを連通させる二次空気流入路１６を形成し、その二
次空気流入路１６に高圧エアと共に原料を原料供給筒１
２内に噴射するエア噴射ノズル１７を挿入したことを特
徴とする気流分級機における原料供給装置。(1) A conical classifying cover 4 is provided in a main body casing 1 having an open upper portion, and a conical classifying plate 6 is provided below the conical classifying cover 4 to form a classifying chamber 7 therebetween. A raw material supply tube 12 having an end plate 13 is connected to an upper portion of the main body casing 1, and a raw material is supplied from the upper portion of the raw material supply tube 12 in a direction tangential to the outer periphery of the raw material supply tube 12. The raw material descending while rotating inside is swirled into the classification chamber 7 through the annular raw material supply hole 5 formed around the outside of the classification cover 4 and is centrifuged into coarse powder and fine powder. In the supply device, a plurality of guide blades 15 that are inclined in the turning direction of the raw material are provided on the upper circumference of the raw material supply cylinder 12 at a predetermined interval, and the outside and the raw material supply cylinder 12 are provided between adjacent guide blades 15.
The inner forms a secondary air inlet passage 16 for communicating, Part II
The raw material is supplied together with the high-pressure air to the raw air supply tube
2. A raw material supply device in an airflow classifier, wherein an air injection nozzle 17 for injecting the air into the airflow classifier 2 is inserted .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7215713A JP2766790B2 (en) | 1995-08-24 | 1995-08-24 | Raw material supply device in airflow classifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7215713A JP2766790B2 (en) | 1995-08-24 | 1995-08-24 | Raw material supply device in airflow classifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0857424A JPH0857424A (en) | 1996-03-05 |
| JP2766790B2 true JP2766790B2 (en) | 1998-06-18 |
Family
ID=16676944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7215713A Expired - Lifetime JP2766790B2 (en) | 1995-08-24 | 1995-08-24 | Raw material supply device in airflow classifier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2766790B2 (en) |
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| WO2008143267A1 (en) * | 2007-05-15 | 2008-11-27 | Ricoh Company, Ltd. | Pulverizing and coarse powder classifying apparatus and fine powder classifying apparatus |
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| JP2012045477A (en) * | 2010-08-26 | 2012-03-08 | Ricoh Co Ltd | Classifying apparatus and classifying method, toner and method for producing the toner |
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| JP3752096B2 (en) * | 1999-03-03 | 2006-03-08 | 日本ニューマチック工業株式会社 | Airflow classifier |
| JP4818807B2 (en) * | 2005-05-26 | 2011-11-16 | 日本ニューマチック工業株式会社 | Airflow classifier and classification plant |
| JP4907655B2 (en) * | 2006-06-13 | 2012-04-04 | 日本ニューマチック工業株式会社 | Airflow classifier and classification plant |
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| WO2012066885A1 (en) | 2010-11-16 | 2012-05-24 | 株式会社日清製粉グループ本社 | Powder classifying device |
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Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5620913A (en) * | 1979-07-30 | 1981-02-27 | Ritsupu Sa | Gas burner |
| JPS6193880A (en) * | 1984-10-15 | 1986-05-12 | 日本ニユ−マチツク工業株式会社 | Sorter |
| JPH0248076Y2 (en) * | 1985-11-05 | 1990-12-17 |
-
1995
- 1995-08-24 JP JP7215713A patent/JP2766790B2/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008143267A1 (en) * | 2007-05-15 | 2008-11-27 | Ricoh Company, Ltd. | Pulverizing and coarse powder classifying apparatus and fine powder classifying apparatus |
| US8096492B2 (en) | 2007-05-15 | 2012-01-17 | Ricoh Company, Ltd. | Pulverizing and coarse powder classifying apparatus and fine powder classifying apparatus |
| EP2090381A1 (en) | 2008-02-15 | 2009-08-19 | Ricoh Company, Ltd. | Air classifier |
| US8668091B2 (en) | 2008-02-15 | 2014-03-11 | Ricoh Company, Ltd. | Air classifier |
| JP2012045477A (en) * | 2010-08-26 | 2012-03-08 | Ricoh Co Ltd | Classifying apparatus and classifying method, toner and method for producing the toner |
| CN102416382A (en) * | 2010-08-26 | 2012-04-18 | 株式会社理光 | Classifying apparatus, classifying method, toner and method for producing the toner |
| CN102416382B (en) * | 2010-08-26 | 2015-04-01 | 株式会社理光 | Classifying apparatus, classifying method, toner and method for producing the toner |
| US9207552B2 (en) | 2010-08-26 | 2015-12-08 | Ricoh Company, Ltd. | Classifying apparatus, classifying method, toner and method for producing the toner |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0857424A (en) | 1996-03-05 |
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