US6171369B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cleaner bag construction and method of operation
Assignee: Eurofilters NV
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Filing: 1999-05-07
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Granted: 2001-01-09
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Expires: 2019-05-07
Abstract
Abstract A disposable vacuum cleaner filter bag is constructed of layers which include a filtration grade meltblown fleece layer having a basis weight of about 10-50 g/m 2 and air permeability of about 100-1000 L/(m 2 ×s) and a coarse filter layer in which the coarse filter layer is placed upstream of the filtration grade meltblown fleece layer. The coarse filter layer can include either wet-laid high dust capacity paper, dry-laid high dust capacity paper, high bulk meltblown nonwoven, Spunblown (Modular) nonwoven or microdenier spunbond nonwoven. Juxtaposition of the layers causes the coarse filter layer to capture large dirt particles and permits the filtration grade meltblown fleece layer to capture much of the remaining dust particles. The novel bag exhibits high air permeability and low pressure drop at high dust loading. A method of filtering gas through such a filter is also disclosed.
Inventors
- 👤 Bas Schultink
- 👤 Jan Schultink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:32
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/1607; A; A47; A47L; A47L9/00; A47L9/10; A47L9/14; A47L9/1418; B01D39/1623; B01D39/18; B32; B32B; B32B29/00; B32B29/02; B32B5/00; B32B5/22; B32B5/24; B32B5/26; D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4374; D04H1/54; D04H1/559; D04H1/56; D04H1/58; D04H1/593; Y; Y10; Y10S; Y10S55/00; Y10S55/02; Y10S55/39
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
57 words
A disposable vacuum cleaner bag comprising a coarse filter layer comprising at least one of (a) a wet-laid high capacity paper, (b) a dry-laid high capacity paper, (c) a high bulk meltblown nonwoven, (d) a Spunblown (Modular) nonwoven, (e) a microdenier spunbond nonwoven positioned upstream in the direction of air flow of a filtration grade meltblown fleece.
Claim 2
Dependent Claim
57 words
A disposable vacuum cleaner bag comprising a coarse filter layer comprising at least one of (a) a wet-laid high capacity paper, (b) a dry-laid high capacity paper, (c) a high bulk meltblown nonwoven, (d) a Spunblown (Modular) nonwoven, (e) a microdenier spunbond nonwoven positioned upstream in the direction of air flow of a filtration grade meltblown fleece.
Claim 3
Dependent Claim
31 words
The bag of claim 1 in which the filtration grade meltblown fleece layer has a basis weight of about 10-50 g/m 2 and air permeability of about 100-1500 L/(m 2 ×s).
Claim 4
Dependent Claim
88 words
The bag of claim 2 in which the wet-laid high dust capacity paper has a basis weight of about 30-150 g/m 2 , air permeability of about 500-8000 L/(m 2 ×s)and pore size of at least about 160 μm, the dry-laid high dust capacity paper has a basis basis weight of about 30-150 g/m 2 and air permeability of about 500-8000 L/(m 2 ×s) and the high bulk meltblown nonwoven has a basis weight of about 30-180 g/m 2 and air permeability of about 300-8000 L/(m 2 ×s).
Claim 5
Dependent Claim
110 words
The bag of claim 1 further comprising downstream of the filtration grade meltblown fleece layer at least one outer layer comprising at least one of the following (i) a spunbond, wet-laid, dry-laid or hydroentangled nonwoven or netting having a basis weight of about 6-80 g/m 2 and air permeability of about 500-10,000 L/(m 2 ×s), and (ii) an odor absorbing composite comprising an activated carbon fiber layer having a basis weight of about 25-500 g/m 2 and air permeability of about 500-3000 L/(m 2 ×s) upstream of a backing layer of fleece having a basis weight of about 15-100 g/m 2 and air permeability of about 2000-5000 L/(m 2 ×s).
Claim 6
Dependent Claim
18 words
The bag of claim 1 further comprising a support layer upstream of the filtration grade meltblown fleece layer.
Claim 7
Dependent Claim
14 words
The bag of claim 5 in which the support layer is a spunbond nonwoven.
Claim 8
Dependent Claim
39 words
The bag of claim 5 in which the support layer is upstream of the coarse filter layer and is one of the following (i) a netting scrim bonded to the coarse filter layer or (ii) a wet-laid tissue fleece.
Claim 9
Dependent Claim
24 words
The bag of claim 1 in which at least one layer is of a material of suitable dielectric properties and which is electrostatically charged.
Claim 10
Dependent Claim
20 words
The bag of claim 1 in which at least one layer is bonded to an adjacent layer of the bag.
Claim 11
Dependent Claim
18 words
The bag of claim 9 in which the bonded layers are bonded with a porous hot melt adhesive.
Claim 12
Dependent Claim
12 words
The bag of claim 9 in which all adjacent layers are bonded.
Claim 13
Dependent Claim
70 words
The bag of claim 1 further comprising an odor absorbing composite upstream of the filtration grade meltblown fleece layer, the composite comprising an activated carbon fiber layer having a basis weight of about 25-500 g/m 2 and air permeability of about 500-3000 L/(m 2 ×s) downstream of a backing layer of fleece having a basis weight of about 15-100 g/m 2 and air permeability of about 2000-5000 L/m 2 /s.
Claim 14
Dependent Claim
43 words
The bag of claim 4 in which the outer layer is spunbond nonwoven having a basis weight of about 10-40 g/m 2 , and the coarse filter layer is high bulk meltblown nonwoven having a basis weight of about 30-180 g/m 2 .
Claim 15
Dependent Claim
43 words
The bag of claim 4 in which the outer layer is spunbond nonwoven having a basis weight of about 10-40 g/m 2 and the coarse filter layer is a wet-laid high dust capacity paper having air permeability of about 500-8000 L/(m 2 ×s).
Claim 16
Dependent Claim
43 words
The bag of claim 4 in which the outer layer is spunbond nonwoven having a basis weight of about 10-40 g/m 2 and the coarse filter layer is a dry-laid high dust capacity paper having air permeability of about 500-8000 L/(m 2 ×s).
Claim 17
Dependent Claim
37 words
The bag of claim 1 in which the dry-laid high capacity paper comprises bicomponent fibers having a sheath of one polymer and a core of a different polymer having a melting point higher than the one polymer.
Claim 18
Dependent Claim
20 words
The bag of claim 16 in which the bicomponent fibers comprise about 25-50% of the dry-laid high dust capacity paper.
Claim 19
Dependent Claim
16 words
The bag of claim 16 in which the core is polypropylene and the sheath is polyethylene.
Claim 20
Dependent Claim
16 words
The bag of claim 16 in which the core is disposed eccentric relative to the sheath.
Claim 21
Dependent Claim
17 words
The bag of claim 16 in which the bicomponent fibers have one polymer alongside the different polymer.
Claim 22
Dependent Claim
15 words
The bag of claim 1 in which the high bulk meltblown nonwoven is electrostatically charged.
Claim 23
Dependent Claim
63 words
A filter for removing particles entrained in a gas comprising a coarse filter layer comprising at least one of (a) a wet-laid high capacity paper, (b) a dry-laid high capacity paper, (c) a high bulk meltblown nonwoven, (d) a Spunblown (Modular) nonwoven, and (e) a microdenier spunbond nonwoven positioned upstream in the direction of air flow of a filtration grade meltblown fleece layer.
Claim 24
Dependent Claim
63 words
A filter for removing particles entrained in a gas comprising a coarse filter layer comprising at least one of (a) a wet-laid high capacity paper, (b) a dry-laid high capacity paper, (c) a high bulk meltblown nonwoven, (d) a Spunblown (Modular) nonwoven, and (e) a microdenier spunbond nonwoven positioned upstream in the direction of air flow of a filtration grade meltblown fleece layer.
Claim 25
Dependent Claim
106 words
The filter of claim 22 further comprising downstream of the filtration grade meltblown fleece layer at least one outer layer comprising one of the following (i) a nonwoven scrim of spunbond, wet-laid, dry-laid or hydroentangled fabric having a weight of about 6-80 g/m 2 and air permeability of about 500-12,000 L/(m 2 ×s), and (ii) an odor absorbing composite comprising an activated carbon fiber layer having a weight of about 25-500 g/m 2 and air permeability of about 500-3000 L/m 2 /s upstream of a backing layer of fleece having a weight of about 15-100 g/m 2 and air permeability of about 2000-5000 L/m 2 /s.
Claim 26
Independent Claim
70 words
A method of filtering a gas comprising passing a gas entrained with particles through a filter comprising a coarse filter layer comprising at least one of (a) a wet-laid high capacity paper, (b) a dry-laid high capacity paper, (c) a high bulk meltblown nonwoven, (d) a Spunblown (Modular) nonwoven, and (e) a microdenier spunbond nonwoven positioned upstream in the direction of air flow of a filtration grade meltblown fleece layer.
Claim 27
Independent Claim
70 words
A method of filtering a gas comprising passing a gas entrained with particles through a filter comprising a coarse filter layer comprising at least one of (a) a wet-laid high capacity paper, (b) a dry-laid high capacity paper, (c) a high bulk meltblown nonwoven, (d) a Spunblown (Modular) nonwoven, and (e) a microdenier spunbond nonwoven positioned upstream in the direction of air flow of a filtration grade meltblown fleece layer.
Claim 28
Dependent Claim
110 words
The method of claim 24 in which the filter further comprising downstream of the filtration grade meltblown fleece layer at least one outer layer comprising one of the following (i) a nonwoven scrim of spunbond, wet-laid, dry-laid or hydroentangled fabric having a weight of about 6-80 g/m 2 and air permeability of about 500-12,000 L/(m 2 ×s), and (ii) an odor absorbing composite comprising an activated carbon fiber layer having a weight of about 25-500 g/m 2 and air permeability of about 500-3000 L/(m 2 ×s) upstream of a backing layer of fleece having a weight of about 15-100 g/m 2 and air permeability of about 2000-5000 L/(m 2 ×s).
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-01-09 | 2004-07-10 | 2005-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-01-09 | 2008-07-10 | 2009-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-01-09 | 2012-07-10 | 2013-01-09 | $7700.00 | Window Closed / Lapsed |