JPH0435205B2 - - Google Patents
Info
- Publication number
- JPH0435205B2 JPH0435205B2 JP61052630A JP5263086A JPH0435205B2 JP H0435205 B2 JPH0435205 B2 JP H0435205B2 JP 61052630 A JP61052630 A JP 61052630A JP 5263086 A JP5263086 A JP 5263086A JP H0435205 B2 JPH0435205 B2 JP H0435205B2
- Authority
- JP
- Japan
- Prior art keywords
- nonwoven fabric
- filter
- vacuum cleaner
- filter paper
- surface charge
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/28—Plant or installations without electricity supply, e.g. using electrets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
- B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
- B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filters For Electric Vacuum Cleaners (AREA)
- Filtering Materials (AREA)
- Electrostatic Separation (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、低圧損、高捕集効率を有する袋状掃
除機用フイルタに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a bag-shaped vacuum cleaner filter having low pressure loss and high collection efficiency.
従来、袋状掃除機フイルタとして、不織布や紙
織物フイルタを用いたものがあるが、掃除機の吸
引性能を向上するため低圧損性にすると捕集効率
が低下する。又反対に高捕集性にすると掃除機の
吸引能力が低下するという欠点があつた。
Conventionally, bag-shaped vacuum cleaner filters have been made using non-woven fabric or paper fabric filters, but if they are made to have low pressure loss in order to improve the suction performance of the vacuum cleaner, the collection efficiency decreases. On the other hand, if the collection property is high, the suction ability of the vacuum cleaner will be reduced.
本発明の目的は、前記従来の矛盾する欠点を解
消し、低圧損、高捕集性の袋状掃除機フイルタを
提供するにある。
SUMMARY OF THE INVENTION An object of the present invention is to eliminate the contradictory drawbacks of the conventional filters and to provide a bag-shaped vacuum cleaner filter with low pressure loss and high collection performance.
本発明は、表面電荷密度１×10-10c／cm2以上の
エレクトレツト不織布と濾紙が少なくとも積層さ
れ、かつ見掛密度が0.3ｇ／cm3以下である前記エ
レクトレツト不織布と、見掛密度が0.3ｇ／cm3以
上である前記濾紙とが積層されてなる粗密構造を
有することを特徴とする袋状掃除機フイルタに関
するものである。
The present invention provides an electret nonwoven fabric having a surface charge density of 1×10 -10 c/cm 2 or more and a filter paper, which are laminated at least, and an apparent density of 0.3 g/cm 3 or less, and an apparent density The present invention relates to a bag-shaped vacuum cleaner filter characterized in that it has a sparse and dense structure formed by laminating the above-mentioned filter paper having a density of 0.3 g/cm 3 or more.
本発明の実施態様を図面に基づき説明する。 Embodiments of the present invention will be described based on the drawings.
第１図は本発明の実施態様の一例である。 FIG. 1 is an example of an embodiment of the present invention.
本発明に係る袋状掃除機フイルタ１ａは、袋状
の濾紙２と、これに積層された袋状エレクトレツ
ト不織布３、及び塵埃を含むエアーの流入口を持
つ支持板４で構成されている。第２図は、フイル
タ部分の一部拡大図で、密構造を有する濾紙２と
粗構造を有するエレクトレツト不織布３とからな
る。本発明においては、該粗なエレクトレツト不
織布は見掛密度が0.3ｇ／cm3以下のものを用い、
該密な濾紙は見掛密度が0.3ｇ／cm3以上であるも
のを用いて、それらが積層されて粗密構造を呈す
るように構成されている。第３図は上記フイルタ
の表面電荷密度の分極を示す。第４図は、本発明
に係る他の実施態様の一例である。 A bag-shaped vacuum cleaner filter 1a according to the present invention is composed of a bag-shaped filter paper 2, a bag-shaped electret nonwoven fabric 3 laminated thereon, and a support plate 4 having an inlet for air containing dust. FIG. 2 is a partially enlarged view of the filter portion, which is composed of a filter paper 2 having a dense structure and an electret nonwoven fabric 3 having a coarse structure. In the present invention, the coarse electret nonwoven fabric has an apparent density of 0.3 g/cm 3 or less,
The dense filter paper has an apparent density of 0.3 g/cm 3 or more, and is constructed so that it exhibits a coarse and dense structure by laminating them. FIG. 3 shows the polarization of the surface charge density of the filter. FIG. 4 is an example of another embodiment according to the present invention.
本発明の袋状掃除機フイルタ１ｂは、濾紙２、
エレクトレツト不織布３、不織布５からなる３層
構造の袋状になつて、支持板４に取り付けられて
いる。 The bag-shaped vacuum cleaner filter 1b of the present invention includes a filter paper 2,
It is attached to a support plate 4 in the form of a bag with a three-layer structure consisting of an electret nonwoven fabric 3 and a nonwoven fabric 5.
第５図はそのフイルタ部分の拡大図を示すもの
で、密構造の濾紙２と、粗構造のエレクトレツト
不織布３と、さらに粗構造の不織布５で構成され
る。 FIG. 5 shows an enlarged view of the filter portion, which is composed of a filter paper 2 having a dense structure, an electret nonwoven fabric 3 having a coarse structure, and a nonwoven fabric 5 having a coarse structure.
第６図は上記フイルタの電気分極の様子を示
す。なお第３図および第６図の如く、エレクトレ
ツト不織布が有する表面の電荷によつて、濾紙及
び他不織布にも静電誘導による分極電荷があらわ
れる。エレクトレツト不織布は、表面電荷密度が
１×10-10c／cm2以上有するもので、更に好ましく
は３×10-10c／cm2がよい。 FIG. 6 shows the electrical polarization of the filter. As shown in FIGS. 3 and 6, polarization charges due to electrostatic induction appear on filter paper and other nonwoven fabrics due to the surface charges of the electret nonwoven fabric. The electret nonwoven fabric has a surface charge density of 1×10 −10 c/cm 2 or more, more preferably 3×10 −10 c/cm 2 .
エレクトレツト不織布はシート内部及び外部に
対して電気的作用を及ぼす。 The electret nonwoven fabric exerts an electrical effect on the inside and outside of the sheet.
又、本エレクトレツト不織布の構造は粗構造で
ある。即ち、不織布の見掛密度が小さいことをい
う。 Further, the structure of the present electret nonwoven fabric is a rough structure. In other words, the apparent density of the nonwoven fabric is low.
即ち、比較的大きな粒子、綿くずなどを捕集し
かつ、電気力によつて捕集効率を向上するのみで
なく繊維表面に強固に付着せしめ、再飛散及び密
構造を有する濾紙側へのダスト移行を防止して、
圧損上昇原因を抑制する作用を有している。 In other words, it not only collects relatively large particles, cotton waste, etc. and improves the collection efficiency using electric force, but also firmly adheres to the fiber surface and prevents the dust from re-scattering and reaching the densely structured filter paper side. Preventing migration,
It has the effect of suppressing the cause of pressure drop increase.
かかる作用効果を良好に達成する上で、本発明
者らの知見によれば、該粗なエレクトレツト不織
布は、見掛密度が0.3ｇ／cm3以下のものを用いる
ことが必要であり、さらには0.25ｇ／cm3以下がよ
い。 According to the findings of the present inventors, in order to satisfactorily achieve such effects, it is necessary to use the coarse electret nonwoven fabric having an apparent density of 0.3 g/cm 3 or less; is preferably 0.25 g/cm 3 or less.
濾紙は密構造を有し、エレクトレツト不織布を
通過した微粒子を補捉する。 The filter paper has a dense structure and traps fine particles that have passed through the electret nonwoven fabric.
エレクトレツト不織布の外部電気力によつて、
濾紙を構成する繊維にも誘起力が生じ、微粒子の
捕集効率を向上せしめる。 By the external electric force of the electret nonwoven fabric,
Inductive force is also generated in the fibers that make up the filter paper, improving the efficiency of collecting fine particles.
誘起力による捕捉効果を向上するため、エレク
トレツト不織布との積層状態下で濾紙表面での表
面電荷密度は２×10-11c／cm2以上であることが好
ましい。 In order to improve the trapping effect by induced force, it is preferable that the surface charge density on the surface of the filter paper is 2×10 −11 c/cm 2 or more in a laminated state with the electret nonwoven fabric.
このために濾紙としては、目付150ｇ／m2以下
が好ましく、さらに好ましくは100ｇ／m2以下が、
高い表面電荷密度を持つて好ましい。 For this reason, the filter paper preferably has a basis weight of 150 g/m 2 or less, more preferably 100 g/m 2 or less,
It is preferred because it has a high surface charge density.
又、密構造は、機械的捕集効率を向上する意味
から好ましいが、電気的効果を上げる意味からも
好ましく、見掛密度として0.3ｇ／cm3以上である
ことが必要であり、さらには0.35ｇ／cm3以上が好
ましい。 Further, a dense structure is preferable from the perspective of improving mechanical collection efficiency, but is also preferable from the perspective of increasing electrical effects, and the apparent density needs to be 0.3 g/cm 3 or more, and more preferably 0.35 g/cm 3 or more. g/cm 3 or more is preferable.
特に第６図に示すように、エレクトレツト不織
布３の上にさらに不織布５を積層すればさらに性
能が向上して好ましい。 In particular, as shown in FIG. 6, it is preferable to further layer a nonwoven fabric 5 on top of the electret nonwoven fabric 3, since this further improves performance.
エレクトレツト不織布に使用する不織布として
は、短繊維不織布、スパンボンド不織布、メルト
ブロー不織布、フラツシユ紡紙不織布などを用い
ることができる。 As the nonwoven fabric used for the electret nonwoven fabric, short fiber nonwoven fabric, spunbond nonwoven fabric, melt blown nonwoven fabric, flat spun paper nonwoven fabric, etc. can be used.
特にメルトブロー不織布は、1d以下の極細繊
維でできているためエレクトレツト効率が高く表
面電荷密度の向上のため好ましい。 In particular, melt-blown nonwoven fabrics are preferred because they are made of ultrafine fibers of 1 d or less, have high electret efficiency, and improve surface charge density.
又、エレクトレツト不織布の素材は、ポリオレ
フイン（ポリプロピレン、ポリエチレン、ポリス
チレン）、ポリエステル、ポリアミド、弗素系樹
脂、ポリカーボネート、ポリアクリルニトリル、
塩ビ樹脂、無機材料など、体積抵抗率が1012Ω・
cm以上の素材であれば種々用いることができる。 In addition, the materials of electret nonwoven fabric include polyolefin (polypropylene, polyethylene, polystyrene), polyester, polyamide, fluorine resin, polycarbonate, polyacrylonitrile,
Volume resistivity of PVC resin, inorganic materials, etc. is 10 12 Ω.
Various materials can be used as long as they are larger than cm.
濾紙とは、パルプ、天然繊維、合成繊維、無機
繊維などからなる抄紙技術によつて製造されたも
のをいう。 Filter paper refers to paper manufactured using papermaking technology made of pulp, natural fibers, synthetic fibers, inorganic fibers, etc.
又、一部に導電性材料など含むものあるいはコ
ーテイングなどされたものも含む。 It also includes those that partially contain a conductive material or are coated with a conductive material.
上記の濾紙であればエレクトレツト不織布によ
つて表面電荷密度を有することが可能である。 The above filter paper can have a surface charge density due to the electret nonwoven fabric.
エレクトレツト不織布は、単層のみでなく、積
層された構成を持つたものでも本発明の効果を妨
げない。 The electret nonwoven fabric may have a laminated structure as well as a single layer structure without impairing the effects of the present invention.
塵埃エアーの流入口を持つ支持板は、一般に厚
紙を用いるが、これに限定されるものではない。 The support plate having the dust air inlet is generally made of cardboard, but is not limited to this.
フイルタの積層方法であるが、単なる積層でも
よく、また、接着剤、融着剤による積層接合、
又、機械的積層接合、例えばニードルバンチ、ウ
オーターパンチ、縫製などでもよい。 As for the method of laminating filters, simple lamination may be used, and lamination bonding using adhesive or fusing agent,
Alternatively, mechanical lamination bonding such as needle bunching, water punching, sewing, etc. may be used.
袋状の形態は、掃除機の形状によつて色々の変
化をすることができる。 The bag-like form can change in various ways depending on the shape of the vacuum cleaner.
評価方法として、見掛密度、体積抵抗率、表面
電荷密度について述べる。 As evaluation methods, we will discuss apparent density, volume resistivity, and surface charge density.
見掛密度の測定は、JIS−L1079に記載の見掛
比重に準じて行なつた。 The apparent density was measured according to the apparent specific gravity described in JIS-L1079.
但し、この中で必要となる厚み測定はJIS−
L1085に準じた。 However, the required thickness measurement is JIS-
According to L1085.
体積抵抗率の測定はJIS−C2318に準じて行な
つた。表面電荷密度の測定は第７図に示す装置で
行なつた。 The volume resistivity was measured according to JIS-C2318. The surface charge density was measured using the apparatus shown in FIG.
即ち測定すべき繊維状物からなるシート６をア
ースした金属板７上に置き、他の金属電極（４cm
径）を上方より接触せしめて、試料表面に存在す
る電荷を静電誘導で金属電極８に生じせしめ、こ
の電荷をコンデンサー９にためて電位計１０でそ
の電位を測定し、下式より表面電荷密度を求め
る。 That is, a sheet 6 made of the fibrous material to be measured is placed on a grounded metal plate 7, and another metal electrode (4 cm
The electric charge existing on the sample surface is generated in the metal electrode 8 by electrostatic induction, and this electric charge is stored in the capacitor 9 and the potential is measured with the electrometer 10.The surface charge is calculated from the following formula. Find the density.
表面電荷密度（ｃ／cm2）＝Ｃ×Ｖ／Ｓ
Ｃ：コンデンサー容量（フアラツド）
Ｖ：電位（ボルト）
Ｓ：電極面積（cm2）
実施例 １
容積量２、ラグビーボール状の袋を作成し
た。構成はパルプからなる見掛密度0.43ｇ／cm3、
目付50ｇ／m2からなる濾紙と、見掛密度0.14ｇ／
cm3、目付25ｇ／m2、表面電荷密度8.5×10-10c／
cm2のポリプロピレンメルトブロー不織布からな
る。そのメルトブロー不織布の平均織度は0.05d
である。この両者を積層した。積層後の濾紙面で
の表面電荷密度は1.8×10-10c／cm2であつた。 Surface charge density (c/cm 2 )=C×V/SC C: Capacitance of capacitor (volts) V: Potential (volts) S: Electrode area (cm 2 ) Example 1 A rugby ball-shaped bag with a volume of 2 was created. did. Composed of pulp with apparent density 0.43g/cm 3 ,
Filter paper with a basis weight of 50g/ m2 and an apparent density of 0.14g/m2
cm 3 , area weight 25g/m 2 , surface charge density 8.5×10 -10 c/
Composed of cm 2 polypropylene melt-blown non-woven fabric. The average weave degree of the melt-blown nonwoven fabric is 0.05d
It is. Both were laminated. The surface charge density on the filter paper surface after lamination was 1.8×10 −10 c/cm 2 .
本発明のフイルタに直径が0.3μｍのポリスチレ
ン粒子を面風速1.5ｍ／minで送風して初期捕集
効率を測定した。その結果、99.1％であつた。 The initial collection efficiency was measured by blowing polystyrene particles having a diameter of 0.3 μm through the filter of the present invention at a surface velocity of 1.5 m/min. The result was 99.1%.
その後１週間運転継続して測定したが、捕集効
率の変化は認められなかつた。また圧損上昇も
0.3mmａ ｑ以下であつた。 After that, the operation was continued for one week and measurements were taken, but no change in collection efficiency was observed. Also, the pressure drop increases
It was less than 0.3 mmaq.
比較例 １
エレクトレツト化していない他は実施例１と同
様のメルトブロー不織布と濾紙を用いて、積層し
たフイルムで測定した結果、捕集効率は89.1％で
あつた。Comparative Example 1 Using the same melt-blown nonwoven fabric and filter paper as in Example 1 except that they were not electrified, measurement was performed on a laminated film, and the collection efficiency was 89.1%.
実施例 ２
実施例１の袋状掃除機フイルタの内側に更に、
見掛密度0.12ｇ／cm3、目付40ｇ／m2、繊度3dのス
パンボンド不織布を積層した袋状掃除機フイルタ
を作成した。Example 2 Inside the bag-shaped vacuum cleaner filter of Example 1,
A bag-shaped vacuum cleaner filter was prepared by laminating spunbond nonwoven fabrics having an apparent density of 0.12 g/cm 3 , a basis weight of 40 g/m 2 , and a fineness of 3 d.
積層後の濾紙面の表面電荷密度は、７×
10-11c／cm2、不織布面での表面電荷密度は６×
10-11c／cm2であつた。 The surface charge density of the filter paper after lamination is 7×
10 -11 c/cm 2 , surface charge density on the nonwoven fabric surface is 6×
It was 10 -11 c/ cm2 .
本フイルタに実施例１と同条件でフイルタ性能
を評価した結果、初期捕集効率で99.6％であり、
２週間後の捕集効率も殆ど変化なかつた。 The filter performance of this filter was evaluated under the same conditions as in Example 1, and the initial collection efficiency was 99.6%.
There was almost no change in the collection efficiency after two weeks.
圧力損失の上昇は0.4mmaq以下であつた。 The increase in pressure drop was less than 0.4 mmaq.
本発明の掃除機フイルタは、低圧損、高捕集効
率で、掃除機の吸引能力を向上し、排気するエア
ーもクリーン度が高いものを提供することができ
る。
The vacuum cleaner filter of the present invention has low pressure drop and high collection efficiency, improves the suction ability of the vacuum cleaner, and can provide highly clean air to be exhausted.
また、掃除機からの着脱も自在にでき、寿命に
なつた場合には、廃棄または清掃することもでき
る。 Moreover, it can be attached and detached from the vacuum cleaner freely, and when its lifespan is reached, it can be disposed of or cleaned.
第１図は本発明に係る掃除機用フイルタの一例
をあらわす模式図、第２図は第１図のフイルタ部
分の一部拡大図、第３図は第１図のフイルタの表
面電荷密度の分極をあらわす説明図、第４図は本
発明に係る袋状掃除機用フイルタの他の一例をあ
らわす模式図、第５図は第４図のフイルタの一部
拡大図、第６図は第４図のフイルタの表面電荷密
度の分極をあらわす説明図、第７図は表面電荷密
度の測定装置をあらわす説明図である。
１ａ，１ｂ：本発明に係る袋状掃除機用フイル
タ、２：濾紙、３：エレクトレツト不織布、４：
支持板、５：不織布、６：繊維状シート（試料）、
７：アース電極、８：金属電極、９：コンデンサ
ー、１０：電位計。
Fig. 1 is a schematic diagram showing an example of a filter for a vacuum cleaner according to the present invention, Fig. 2 is a partially enlarged view of the filter portion of Fig. 1, and Fig. 3 is a polarization of the surface charge density of the filter of Fig. 1. FIG. 4 is a schematic diagram showing another example of the filter for a bag-shaped vacuum cleaner according to the present invention, FIG. 5 is a partially enlarged view of the filter in FIG. 4, and FIG. FIG. 7 is an explanatory diagram showing the polarization of the surface charge density of the filter. FIG. 7 is an explanatory diagram showing the surface charge density measuring device. 1a, 1b: Bag-shaped vacuum cleaner filter according to the present invention, 2: Filter paper, 3: electret nonwoven fabric, 4:
Support plate, 5: Nonwoven fabric, 6: Fibrous sheet (sample),
7: Earth electrode, 8: Metal electrode, 9: Capacitor, 10: Electrometer.
Claims (1)
レツト不織布と濾紙が少なくとも積層され、かつ
見掛密度が0.3ｇ／cm3以下である前記エレクトレ
ツト不織布と、見掛密度が0.3ｇ／cm3以上である
前記濾紙とが積層されてなる粗密構造を有するこ
とを特徴とする掃除機フイルタ。 ２ 濾紙表面の表面電荷密度が２×10-11c／cm2以
上である特許請求の範囲第１項記載の掃除機フイ
ルタ。 ３ フイルタの構造が着脱自在である特許請求の
範囲第１項記載の掃除機フイルタ。[Scope of Claims] 1. The electret nonwoven fabric having a surface charge density of 1×10 -10 c/cm 2 or more and a filter paper are laminated at least, and has an apparent density of 0.3 g/cm 3 or less; A vacuum cleaner filter characterized in that it has a dense structure formed by laminating the filter paper with an apparent density of 0.3 g/cm 3 or more. 2. The vacuum cleaner filter according to claim 1, wherein the surface charge density of the filter paper is 2×10 −11 c/cm 2 or more. 3. The vacuum cleaner filter according to claim 1, wherein the filter structure is removable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5263086A JPS62210026A (en) | 1986-03-12 | 1986-03-12 | Cleaner filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5263086A JPS62210026A (en) | 1986-03-12 | 1986-03-12 | Cleaner filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62210026A JPS62210026A (en) | 1987-09-16 |
| JPH0435205B2 true JPH0435205B2 (en) | 1992-06-10 |
Family
ID=12920138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5263086A Granted JPS62210026A (en) | 1986-03-12 | 1986-03-12 | Cleaner filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62210026A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2098915A2 (en) | 2008-03-03 | 2009-09-09 | Ricoh Company, Ltd. | A development device comprising a process cartridge and an image formation apparatus comprising the development device |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3812849C3 (en) * | 1988-04-18 | 1996-03-21 | Gessner & Co Gmbh | Dust filter bag, its manufacture and use |
| US4917942A (en) * | 1988-12-22 | 1990-04-17 | Minnesota Mining And Manufacturing Company | Nonwoven filter material |
| JPH06241701A (en) * | 1993-02-15 | 1994-09-02 | Kikoo Kk | Excess weld metal height gauge and method for measuring excess weld metal height using it |
| JP3920200B2 (en) * | 2002-11-27 | 2007-05-30 | シャープ株式会社 | Electric vacuum cleaner |
| JP2006061582A (en) * | 2004-08-30 | 2006-03-09 | Toshiba Tec Corp | Electric vacuum cleaner |
| JP4974620B2 (en) * | 2006-09-07 | 2012-07-11 | 三菱電機株式会社 | Dust collection bag for electric vacuum cleaner and electric vacuum cleaner |
| JP4485537B2 (en) * | 2007-01-05 | 2010-06-23 | 日立アプライアンス株式会社 | Vacuum cleaner |
| CN104907174B (en) * | 2015-06-22 | 2017-02-01 | 上海智东实业有限公司 | Double airbag electrostatic periodic adsorption dust collection device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5624013A (en) * | 1979-05-04 | 1981-03-07 | Nitta Kk | Structure of air filter element |
| JPS60244316A (en) * | 1984-05-21 | 1985-12-04 | Kotsukou Seishi Kk | Sheet like article for filter |
-
1986
- 1986-03-12 JP JP5263086A patent/JPS62210026A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2098915A2 (en) | 2008-03-03 | 2009-09-09 | Ricoh Company, Ltd. | A development device comprising a process cartridge and an image formation apparatus comprising the development device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62210026A (en) | 1987-09-16 |
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