JPH0630869A - Throwaway paper bag filter for vacuum cleaner - Google Patents
Throwaway paper bag filter for vacuum cleanerInfo
- Publication number
- JPH0630869A JPH0630869A JP21072692A JP21072692A JPH0630869A JP H0630869 A JPH0630869 A JP H0630869A JP 21072692 A JP21072692 A JP 21072692A JP 21072692 A JP21072692 A JP 21072692A JP H0630869 A JPH0630869 A JP H0630869A
- Authority
- JP
- Japan
- Prior art keywords
- filter
- vacuum cleaner
- paper bag
- bag filter
- support layer
- 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
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、水と共に湿潤したゴミ
も集塵することができる電気掃除機に適用され、内部に
集積したゴミ、微細な塵埃と共に捨てるのに好適な電気
掃除機用の使い捨て紙袋フィルターに関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to an electric vacuum cleaner capable of collecting moistened dust with water, and is suitable for throwing away dust accumulated inside and fine dust. The present invention relates to a disposable paper bag filter.
【０００２】[0002]
【従来の技術】従来から存在する電気掃除機用のフィル
ターとして使用される紙袋フィルターは、内部に集積し
たゴミや塵埃と共に使い捨てることを前提としているの
で、坪量が３０〜８０ｇ／ｍ2 程度であって、比較的安
価な濾紙を使用しているものが多い。しかし、上記した
従来の使い捨てフィルターに使用される濾紙は、反復使
用するフィルター用として使用される織布、不織布、発
泡ウレタン等の素材に比べて単位面積あたりの集塵量が
小さく、強度特性も劣るという欠点があるため、種々の
素材を使用する試みがなされてきた。 2. Description of the Related Art A conventional paper bag filter used as a filter for an electric vacuum cleaner has a basis weight of about 30 to 80 g / m 2 because it is supposed to be disposed of together with dust and dirt accumulated inside. However, many use relatively inexpensive filter paper. However, the filter paper used for the above-mentioned conventional disposable filter has a smaller dust collection amount per unit area and strength characteristics as compared with materials such as woven cloth, non-woven cloth, and urethane foam used for repeatedly used filters. Attempts have been made to use various materials due to their inferior disadvantages.
【０００３】例えば、特開昭６２−４２７１７号公報や
特公昭６３−５６８１１号公報に記載のフィルターは、
全体若しくは単位面積あたりの構成比率として４０重量
％以上に不織布を使用して単位面積あたりの集塵量を大
きくする試みが記載されている。また、特公昭５４−１
４７８０号公報に記載のフィルターは、寒冷紗の両面に
接着剤を塗布し、両面にクレープを付けた紙（濾紙）を
貼合して強度特性を向上させ、且つ単位面積あたりの集
塵量を大きくする試みが記載されている。For example, the filters described in JP-A-62-42717 and JP-B-63-56811 are
An attempt is made to increase the amount of dust collected per unit area by using a non-woven fabric in an amount of 40% by weight or more as a whole or a composition ratio per unit area. In addition,
The filter described in Japanese Patent No. 4780 has an adhesive applied to both sides of a ginseng, and paper (filter paper) with crepes attached to both sides is bonded to improve strength characteristics, and the amount of dust collected per unit area is increased. Attempts to do so are described.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、従来の
使い捨て紙袋フィルターには次のような欠点がある。即
ち、使い捨て紙袋フィルターに使用される濾紙の多く
は、木材パルプやマニラ麻パルプ等の天然繊維とレーヨ
ン繊維等を主原料にしているが、これらの繊維は全て親
水性のセルロース繊維であり、乾燥時の強度に比べて湿
潤時の強度が著しく低下するという欠点がある。また、
寒冷紗の両面に濾紙層を配する３層構造にすると、各濾
紙層の坪量をそれぞれ低減させることとなるので、十分
な湿潤強度が得られない。即ち、濾紙の湿潤強度に対す
る坪量の寄与率は非常に高く、同質の濾紙で坪量を半減
させるとその湿潤強度は３０％以下に低下する。However, the conventional disposable paper bag filter has the following drawbacks. That is, many of the filter papers used for disposable paper bag filters are mainly made of natural fibers such as wood pulp and Manila hemp pulp and rayon fibers, but these fibers are all hydrophilic cellulose fibers, and when dried There is a drawback that the strength when wet is significantly lower than the strength of. Also,
When a three-layer structure in which filter paper layers are arranged on both sides of a ginseng cloth is used, the basis weight of each filter paper layer is reduced, and sufficient wet strength cannot be obtained. That is, the contribution ratio of the grammage to the wet strength of the filter paper is very high, and when the grammage of the filter paper of the same quality is reduced by half, the wet strength thereof is reduced to 30% or less.
【０００５】上記した欠点のうち、湿潤強度の向上を図
るため、エポキシ化ポリアミド樹脂やメラミン樹脂等の
熱硬化性の合成樹脂を介在させることにより繊維間に架
橋結合を形成させる例もある。また、ポリエステルやポ
リオレフィン系の熱可塑性合成樹脂繊維を使用し、加熱
処理を行って繊維の溶融・可塑変形により新たな繊維間
結合を形成させ湿潤強度の向上を図る例もある。Among the above-mentioned drawbacks, there is an example in which a crosslink bond is formed between fibers by interposing a thermosetting synthetic resin such as an epoxidized polyamide resin or a melamine resin in order to improve wet strength. There is also an example in which polyester or polyolefin-based thermoplastic synthetic resin fiber is used, and heat treatment is performed to form a new interfiber bond by melting and plastic deformation of the fiber to improve wet strength.
【０００６】しかし、上記したような樹脂を使用する方
法だけでは、湿潤時の強度の低下を防止することに限界
があり、濾紙が濡れると紙袋フィルターが破断する危険
がある。また、湿潤強度の強いポリエステルやポリオレ
フィン系の合成繊維を主体とした織布や不織布の層を設
ける場合、紙袋フィルターを製造する時に使用される比
較的安価な酢酸ビニル樹脂系接着剤では十分な接着力が
得られず、また、不織布層等が嵩張るので複数枚を重ね
合わせて接着する既存形態の紙袋フィルターを製造する
ことが困難である。However, there is a limit to the prevention of the decrease in strength when wet by only the method using the resin as described above, and there is a risk that the paper bag filter is broken when the filter paper gets wet. In addition, when a layer of woven or non-woven fabric composed mainly of polyester or polyolefin synthetic fiber with high wet strength is provided, a relatively inexpensive vinyl acetate resin adhesive used when manufacturing a paper bag filter will provide sufficient adhesion. It is difficult to produce a paper bag filter of the existing form in which a plurality of sheets are superposed and adhered to each other because the strength is not obtained and the nonwoven fabric layer is bulky.
【０００７】上記したような紙袋フィルターの現状に鑑
み、使い捨て紙袋フィルター方式を採用している電気掃
除機の多くは、濡れたゴミ等は集塵しないように使用上
の注意書きを記載している例が多い。一方、内部に貯水
タンク等の集水機構を有し、ゴミの状態に注意すること
なく液体と共にゴミも集塵することができるような電気
掃除機も市販されているが、これらの掃除機には使い捨
て方式の紙袋フィルターを採用している例は少なく、濾
紙フィルターを使用している例はほとんどなかった。従
って、湿潤状態でも破袋する危険がなく、且つ安価な電
気掃除機用の使い捨て紙袋フィルターが希求されてい
た。[0007] In view of the current state of the paper bag filter as described above, many vacuum cleaners adopting the disposable paper bag filter method have written precautions for use so as not to collect wet dust. There are many examples. On the other hand, there are electric vacuum cleaners on the market that have a water collection mechanism such as a water storage tank and can collect dust together with liquid without paying attention to the state of dust. There are few cases that use disposable paper bag filters, and there are few cases that use filter paper filters. Therefore, there is a need for an inexpensive disposable paper bag filter for an electric vacuum cleaner that does not have a risk of breaking the bag even in a wet state.
【０００８】[0008]
【課題を解決するための手段】本発明は上記に鑑み提案
されたもので、坪量５〜３０ｇ／ｍ2 の合成樹脂製網目
支持層と坪量３０〜７０ｇ／ｍ2 の濾紙層を接合し、且
つ濾紙層の構成比率が単位面積あたり６０〜９５重量％
の範囲にある積層濾紙を使用して袋状のフィルターに形
成したことを特徴とする電気掃除起用の使い捨て紙袋フ
ィルターに関するものである。The present invention SUMMARY OF THE INVENTION It is an proposed in view of the above, a basis weight of 5 to 30 g / m 2 of synthetic resin mesh support layer and the basis weight 30~70g / m 2 of bonding the filter paper layer And the composition ratio of the filter paper layer is 60 to 95% by weight per unit area.
The present invention relates to a disposable paper bag filter for electric cleaning, characterized by being formed into a bag-like filter using the laminated filter paper in the range of.
【０００９】上記した本発明に使用する支持層として
は、フラットヤーン織布、フィラメントヤーン織布、経
緯直交積層不織布、紗等を使用することができ、１本の
ヤーンが２ｋｇｆ以上の湿潤強度を有するものが好適で
ある。この支持層は３〜３５ｍｍの格子目間隔（開口
部）を有するものが望ましく、格子目間隔が３ｍｍ以下
であると通気特性が極端に悪化し、３５ｍｍ以上である
と構成される積層濾紙は湿潤引張強さが十分でない。支
持層はダスト保持量やダスト捕集率等のフィルター特性
には殆ど関与しないので、支持層の坪量はフィルター特
性の観点から極力小さい方が望ましい。例えば、支持層
の坪量を３０ｇ／ｍ2 以上（濾紙層の構成比率が４０％
以下）にすると積層濾紙が剛直となり、紙袋フィルター
としての展開性を著しく損い、十分なダスト保持量を確
保できなくなる。加えて、使用後のゴミとしての分別方
法を考慮すると、積層濾紙全体で合成樹脂材の比率が６
０％以上となり紙袋フィルターの意義が薄れる。さら
に、この支持層は開口率を７０％以上にすることが望ま
しく、この場合、支持層表面にも濾紙層の多くが存する
ので、従来と同じ接着方法で紙袋フィルターを作製する
ことができる。As the support layer used in the present invention, a flat yarn woven fabric, a filament yarn woven fabric, a cross-latitude cross-woven nonwoven fabric, a gauze or the like can be used, and one yarn has a wet strength of 2 kgf or more. Those having are preferred. This support layer preferably has a lattice spacing (openings) of 3 to 35 mm, and when the lattice spacing is 3 mm or less, the ventilation characteristics are extremely deteriorated, and the laminated filter paper configured to be 35 mm or more is wet. Not enough tensile strength. Since the support layer has almost no relation to the filter characteristics such as the amount of dust retained and the dust collection rate, it is desirable that the basis weight of the support layer is as small as possible from the viewpoint of filter characteristics. For example, the basis weight of the support layer is 30 g / m 2 or more (the composition ratio of the filter paper layer is 40%.
When set to (1) or less, the laminated filter paper becomes rigid, the spreadability as a paper bag filter is significantly impaired, and a sufficient dust holding amount cannot be secured. In addition, considering the method of separating waste after use, the ratio of synthetic resin material in the entire laminated filter paper is 6%.
It becomes 0% or more and the significance of the paper bag filter diminishes. Further, it is desirable that the support layer has an aperture ratio of 70% or more. In this case, since most of the filter paper layer also exists on the surface of the support layer, the paper bag filter can be manufactured by the same adhesion method as the conventional one.
【００１０】次に、本発明に使用する濾紙層は、集塵さ
れたゴミと液体の大多数が濾紙層に衝突して濾過される
ので、濾紙層もある程度の湿潤強度を必要とする。即
ち、濾紙層単独でも０．５０ｋｇｆ／１５ｍｍ以上の湿
潤引張強さ（横方向）を有することが望ましい。Next, in the filter paper layer used in the present invention, most of the collected dust and liquid collide with the filter paper layer and are filtered, so that the filter paper layer also needs a certain degree of wet strength. That is, it is desirable that the filter paper layer alone has a wet tensile strength (transverse direction) of 0.50 kgf / 15 mm or more.
【００１１】本発明の紙袋フィルターは、上記したよう
な支持層と濾紙層とを接合した積層濾紙を袋状に加工し
てなる。この積層濾紙の湿潤引張強さ試験を行うと、濾
紙層が先に破断するが、この時の強さを積層濾紙の湿潤
引張強さと仮定すると、１．５０ｋｇｆ／１５ｍｍ以上
の湿潤引張強さ（横方向）があることが望ましい。ま
た、支持層と濾紙層の接合は、湿潤状態でも接合強度の
低下しない接合方法で行う必要があり、例えばヒートシ
ールラミネート加工や耐水性の接着剤を使用した貼合加
工が好適である。The paper bag filter of the present invention comprises a laminated filter paper obtained by joining the above-mentioned support layer and filter paper layer into a bag shape. When the wet tensile strength test of this laminated filter paper is performed, the filter paper layer breaks first, but assuming that the strength at this time is the wet tensile strength of the laminated filter paper, the wet tensile strength of 1.50 kgf / 15 mm or more ( It is desirable to have (horizontal direction). The support layer and the filter paper layer must be joined by a joining method that does not reduce the joining strength even in a wet state. For example, heat seal laminating or laminating using a water resistant adhesive is suitable.
【００１２】[0012]
【実施例】以下に、本発明の実施例を説明する。 実施例１ 支持層には、坪量７ｇ／ｍ2 、格子目間隔１０ｍｍ、繊
維太さ３００デニールのフラットヤーン織布、商品名
『メルフレックス』（萩原工業株式会社製）を使用し
た。濾紙層には、マニラ麻パルプと針葉樹木材パルプに
抄紙用ポリプロピレン短繊維を２９重量％配合し、坪量
５７ｇ／ｍ2 に抄紙して加熱処理を行った多孔性紙を使
用した。濾紙層の湿潤強度の発現は、エポキシ化ポリア
ミド樹脂の介在による架橋結合とポリプロピレン繊維の
熱溶融・可塑変形により形成される繊維間結合とによる
ものである。そして、支持層と濾過層との接合は、熱カ
レンダーロール機に上記した支持層及び濾紙層を２層同
時に通紙し、加圧するヒートシールラミネート加工によ
り行った。本発明による積層濾紙全体の合成樹脂材の比
率は４０％である。このように作製した本発明による積
層濾紙の構造を図１に示した。図中、１は合成樹脂製網
目支持層、２は濾紙層である。EXAMPLES Examples of the present invention will be described below. Example 1 For the support layer, a flat yarn woven fabric having a basis weight of 7 g / m 2 , a lattice spacing of 10 mm, and a fiber thickness of 300 denier, a product name “Melflex” (manufactured by Hagiwara Kogyo Co., Ltd.) was used. For the filter paper layer, a porous paper was used in which Manila hemp pulp and coniferous wood pulp were blended with 29% by weight of polypropylene short fibers for papermaking, and the paper was made into a basis weight of 57 g / m 2 and heat-treated. The development of the wet strength of the filter paper layer is due to the cross-linking bond due to the interposition of the epoxidized polyamide resin and the inter-fiber bond formed by heat melting and plastic deformation of the polypropylene fiber. Then, the support layer and the filtration layer were joined by heat sealing laminating process in which two layers of the support layer and the filter paper layer described above were simultaneously passed through a hot calender roll machine and pressed. The ratio of the synthetic resin material in the whole laminated filter paper according to the present invention is 40%. The structure of the laminated filter paper according to the present invention thus produced is shown in FIG. In the figure, 1 is a synthetic resin mesh support layer, and 2 is a filter paper layer.
【００１３】比較例１ 現在市販されている電気掃除機用の使い捨て紙袋フィル
ターの１例として、商品名『日本生活協同組合連合会販
売 ＣＰ−Ｂ１』がある。この紙袋フィルターは、坪量
が５０ｇ／ｍ2 であり、マニラ麻パルプ及び針葉樹木材
パルプ、エスパルト、抄紙用ポリエステルバインダー短
繊維が使用され、合成樹脂材の比率は４５重量％であっ
た。湿潤強度の発現は実施例１の濾紙層の項で記載した
ものと同様の方法である。この濾紙は市販されている紙
袋フィルターに使用されている濾紙の中では湿潤強度の
強いものに位置する。Comparative Example 1 As an example of a disposable paper bag filter for an electric vacuum cleaner that is currently on the market, there is a trade name “Japan Consumers' Cooperative Federation Sales CP-B1”. This paper bag filter had a basis weight of 50 g / m 2 , and used Manila hemp pulp, coniferous wood pulp, esparto and polyester binder short fibers for papermaking, and the ratio of the synthetic resin material was 45% by weight. The development of the wet strength is the same as that described in the section of the filter paper layer of Example 1. This filter paper has a high wet strength among the filter papers used in commercially available paper bag filters.
【００１４】（紙質試験）上記した実施例１と比較例１
とを紙質試験した結果を表１に示す。尚、坪量の測定
は、ＪＩＳ Ｐ ８１１７の規定により行った。厚さと
密度の測定は、ＪＩＳ Ｐ ８１１８の規定により行っ
た。引張強さの測定は、ＪＩＳ Ｐ ８１１３の規定に
より行った。湿潤引張強さの測定は、ＪＩＳ Ｐ ８１
３５の規定により行った。透気度の測定は、ＪＩＳ Ｐ
８１１７の規定により行った。(Paper Quality Test) The above-mentioned Example 1 and Comparative Example 1
Table 1 shows the results of paper quality tests of and. The basis weight was measured according to JIS P 8117. The thickness and density were measured according to JIS P 8118. The tensile strength was measured according to JIS P 8113. Wet tensile strength is measured according to JIS P 81
It carried out according to the regulation of 35. The air permeability is measured according to JIS P
It was performed according to the regulations of 8117.
【００１５】[0015]
【表１】 [Table 1]
【００１６】上記した表１より、実施例１の湿潤引張強
さは比較例１に比べて明らかに強いことがわかる。From Table 1 above, it can be seen that the wet tensile strength of Example 1 is clearly higher than that of Comparative Example 1.
【００１７】（集塵試験）次に、前記した実施例１の積
層濾紙を用いて使い捨て紙袋フィルターを作製し、通常
の使い捨て紙袋フィルター方式の電気掃除機に装着し、
湿潤した試験用ダストを吸い込ませる集塵試験を行っ
た。使用した電気掃除機の吸込仕事率は３１０ｗであ
り、これを最大出力で運転することにより集塵試験を行
った。集塵試験用のダストには、砂成分１４重量部、綿
成分６重量部のダストに８０重量部の水を混合したもの
を使用した。尚、前記した比較例１の紙袋フィルターを
使用して同様の集塵試験を行い、この結果を比較した。(Dust collection test) Next, a disposable paper bag filter was produced using the laminated filter paper of Example 1 described above, and mounted on an ordinary vacuum cleaner of the disposable paper bag filter system,
A dust collection test was conducted to suck in the wet test dust. The vacuum cleaner used had a suction power of 310 w, and a dust collection test was conducted by operating this vacuum cleaner at maximum output. As the dust for the dust collection test, a mixture of 14 parts by weight of sand component, 6 parts by weight of cotton component and 80 parts by weight of water was used. The same dust collection test was performed using the paper bag filter of Comparative Example 1 described above, and the results were compared.
【００１８】上記した集塵試験の結果、実施例１の積層
濾紙を使用した紙袋フィルターでは最大２５００ｇの湿
潤したダストを集塵しても破袋することはなかった。こ
れに対して比較例１の紙袋フィルターでは１０００ｇの
ダストを集塵した段階で破袋し、湿潤したダストと水が
掃除機本体内部に飛散した。As a result of the above dust collection test, the paper bag filter using the laminated filter paper of Example 1 did not break even when collecting a maximum of 2500 g of wet dust. On the other hand, in the paper bag filter of Comparative Example 1, the bag was broken when 1000 g of dust was collected, and wet dust and water were scattered inside the cleaner body.
【００１９】[0019]
【発明の効果】以上説明したように、本発明の使い捨て
紙袋フィルターは、通常の電気掃除機は勿論、水と共に
湿潤したゴミも集塵することができる電気掃除機にも適
用することができる。そして、電気掃除機に貯水タンク
を設ければ水とゴミとを分離して捨てることもできる。
また、ゴミと一緒に紙袋フィルターを廃棄する時、紙袋
フィルターを手で絞ると過剰な水が濾過され、ゴミの重
量及び容積を低減させることもできる。As described above, the disposable paper bag filter of the present invention can be applied not only to an ordinary electric vacuum cleaner, but also to an electric vacuum cleaner capable of collecting wet dust together with water. Further, if the electric vacuum cleaner is provided with a water storage tank, water and dust can be separated and discarded.
Further, when the paper bag filter is discarded together with the dust, if the paper bag filter is squeezed by hand, excess water is filtered, and the weight and volume of the dust can be reduced.
【図１】積層濾紙断片の斜視図である。FIG. 1 is a perspective view of a piece of laminated filter paper.
１ 合成樹脂製網目支持層 ２ 濾紙層 1 Synthetic resin mesh support layer 2 Filter paper layer
Claims (5)
支持層（以下、支持層という。）と、坪量３０〜７０ｇ
／ｍ2 の濾紙層とを接合し、且つ濾紙層の構成比率が単
位面積あたり６０〜９５重量％の範囲にある積層濾紙を
使用して袋状のフィルターを構成する様にしたことを特
徴とする電気掃除機用の使い捨て紙袋フィルター。1. A synthetic resin mesh support layer having a basis weight of 5 to 30 g / m 2 (hereinafter referred to as a support layer) and a basis weight of 30 to 70 g.
/ M 2 of the filter paper layer is joined, and a bag-like filter is constructed by using a laminated filter paper in which the composition ratio of the filter paper layer is in the range of 60 to 95% by weight per unit area. Disposable paper bag filter for vacuum cleaner.
求項１に記載の電気掃除機用の使い捨て紙袋フィルタ
ー。2. The disposable paper bag filter for an electric vacuum cleaner according to claim 1, wherein the support layer is made of a flat yarn woven fabric.
る請求項１に記載の電気掃除機用の使い捨て紙袋フィル
ター。3. The disposable paper bag filter for an electric vacuum cleaner according to claim 1, wherein the support layer is made of a filament yarn woven fabric.
求項１に記載の電気掃除機用の使い捨て紙袋フィルタ
ー。4. The disposable paper bag filter for an electric vacuum cleaner according to claim 1, wherein the support layer is made of a non-woven cloth laminated in a straight direction.
気掃除機用の使い捨て紙袋フィルター。5. The disposable paper bag filter for an electric vacuum cleaner according to claim 1, wherein the support layer is made of gauze.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21072692A JP3165979B2 (en) | 1992-07-16 | 1992-07-16 | Disposable paper bag filter for vacuum cleaner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21072692A JP3165979B2 (en) | 1992-07-16 | 1992-07-16 | Disposable paper bag filter for vacuum cleaner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0630869A true JPH0630869A (en) | 1994-02-08 |
| JP3165979B2 JP3165979B2 (en) | 2001-05-14 |
Family
ID=16594092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21072692A Expired - Fee Related JP3165979B2 (en) | 1992-07-16 | 1992-07-16 | Disposable paper bag filter for vacuum cleaner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3165979B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1989007215A1 (en) * | 1988-01-28 | 1989-08-10 | Kvaerner Boving Limited | Butterfly valve blade |
| JP2003093290A (en) * | 2001-09-26 | 2003-04-02 | Kuraray Co Ltd | Dust collecting bag for vacuum cleaner |
| US8784525B2 (en) | 2007-07-06 | 2014-07-22 | Eurofilters Holding N.V. | Vacuum cleaner filter bag |
| US8852306B2 (en) | 2007-07-06 | 2014-10-07 | Eurofilters Holdings N.V. | Vacuum cleaner filter bag |
-
1992
- 1992-07-16 JP JP21072692A patent/JP3165979B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1989007215A1 (en) * | 1988-01-28 | 1989-08-10 | Kvaerner Boving Limited | Butterfly valve blade |
| JP2003093290A (en) * | 2001-09-26 | 2003-04-02 | Kuraray Co Ltd | Dust collecting bag for vacuum cleaner |
| US8784525B2 (en) | 2007-07-06 | 2014-07-22 | Eurofilters Holding N.V. | Vacuum cleaner filter bag |
| US8852306B2 (en) | 2007-07-06 | 2014-10-07 | Eurofilters Holdings N.V. | Vacuum cleaner filter bag |
| EP2011555B2 (en) † | 2007-07-06 | 2017-09-20 | Eurofilters Holding N.V. | Vacuum filter bag |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3165979B2 (en) | 2001-05-14 |
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