US6156086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual media vacuum filter bag
Assignee: 3M Innovative Properties Co
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Filing: 1999-03-22
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Granted: 2000-12-05
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Expires: 2019-03-22
Abstract
Abstract There is provided a vacuum cleaner filer bag including at least two sidewalls which sidewalls are joined by seams. At least one first sidewall comprises a film laminate of a heat sealable film layer and a film support layer. At least one second sidewall comprises a filter laminate comprising at least a synthetic fiber filter layer and synthetic fiber support layer where the at least one first sidewall is joined to adjacent sidewalls by thermal seams. The filter layer is preferably a high efficiency microfiber filter media which provides HEPA level performance for the vacuum cleaner bag.
Inventors
- 👤 Zhiqun Zhang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:03
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/1607; B01D39/1623; A; A47; A47L; A47L9/00; A47L9/10; A47L9/14; Y; Y10; Y10S; Y10S55/00; Y10S55/02; Y10S55/39; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1362
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
72 words
A vacuum cleaner filter bag comprising at least two sidewalls joined by seams at least one first sidewall comprising a film laminate of a heat sealable film layer and a film support layer and at least one second sidewall comprising a filter laminate comprising at least a synthetic fiber filter layer and synthetic fiber support layer where the at least one first sidewall is joined to adjacent sidewalls by a thermal seam.
Claim 2
Dependent Claim
72 words
A vacuum cleaner filter bag comprising at least two sidewalls joined by seams at least one first sidewall comprising a film laminate of a heat sealable film layer and a film support layer and at least one second sidewall comprising a filter laminate comprising at least a synthetic fiber filter layer and synthetic fiber support layer where the at least one first sidewall is joined to adjacent sidewalls by a thermal seam.
Claim 3
Dependent Claim
18 words
The vacuum cleaner filter bag of claim 1 wherein said filter layer comprises a meltblown nonwoven filter layer.
Claim 4
Dependent Claim
19 words
The vacuum cleaner filter bag of claim 1 wherein said filter layer comprises a fibrillated fiber nonwoven filter layer.
Claim 5
Dependent Claim
51 words
The vacuum cleaner filter bag of claim 1 wherein said filter layer has an air permeability of from 2 to 400 m 3 /min/m 2 , a basis weight of from 10 to 200 g/m 2 and is formed at least in part of heat sealable thermoplastic fibers or fiber layers.
Claim 6
Dependent Claim
75 words
The vacuum cleaner filter bag of claim 1 wherein the filter laminate further comprises at least one inner diffusion layer formed of a nonwoven fibrous web of thermoplastic fibers having an air permeability of from 100 m 2 /min/m 2 to 1000 m 3 /min/m 2 the thermoplastic fibers are at least in part heat sealable fibers and the diffusion layer fibrous web has a basis weight of from 10 to 100 g/m 2 .
Claim 7
Dependent Claim
43 words
The vacuum cleaner filter bag of claim 1 wherein said outer support layer comprises a fibrous nonwoven web having an air permeability of from 50 to 500 m 3 /min/m 2 and a basis weight of from 10 to 100 g/m 2 .
Claim 8
Dependent Claim
17 words
The vacuum cleaner filter bag of claim 1 wherein said laminate layers are bonded along peripheral seams.
Claim 9
Dependent Claim
21 words
The vacuum cleaner filter bag of claim 1 wherein the film layer comprises a outer surface of a heat sealable thermoplastic.
Claim 10
Dependent Claim
24 words
The vacuum cleaner filter bag of claim 1 wherein the film layer has a basis weight of from 30 to 200 g/m 2 .
Claim 11
Dependent Claim
29 words
The vacuum cleaner filter bag of claim 1 wherein the film support layer is a nonwoven web having a basis weight of from 10 to 100 g/m 2 .
Claim 12
Dependent Claim
19 words
The vacuum cleaner filter bag of claim 1 wherein the film layer comprises a polypropylene polymer or copolymer film.
Claim 13
Dependent Claim
24 words
The vacuum cleaner filter bag of claim 1 wherein the film layer and the film support layer are substantially unbonded except at the seams.
Claim 14
Dependent Claim
73 words
The vacuum cleaner filter bag of claim 1 wherein the film layer comprises a polypropylene polymer or copolymer film wherein the film layer has a basis weight of from 30 to 200 g/m 2 and the film support layer is a consolidated polypropylene nonwoven web having a basis weight of from 10 to 100 g/m 2 , wherein the film layer and the film support layer are substantially unbonded except at the seams.
Claim 15
Dependent Claim
76 words
The vacuum cleaner filter bag of claim 1 wherein the filter layer is a web of electret charged fibers of a nonconductive thermoplastic resin, having a resistivity greater than 10 14 ohm-cm, which nonwoven filter web has a basis weight (BW) of less than 100 grams/m 2 , an effective fiber diameter (EFD) of less than about 5 microns and a penetration (PEN) of less than 0.03%, wherein the ratio(I); BW/(EFD·PEN) I is greater than 100.
Claim 16
Dependent Claim
22 words
The vacuum cleaner filter bag of claim 14 wherein the filter web fibers are formed from a nonconductive polyolefin resin or blend.
Claim 17
Dependent Claim
21 words
The vacuum cleaner filter bag of claim 14 wherein the filter web basis weight is less than 60 grams/m 2 .
Claim 18
Dependent Claim
23 words
The vacuum cleaner filter bag of claim 14 wherein the filter layer is formed of charged fibers of polypropylene, poly(4-methyl-1-pentene) or blends thereof.
Claim 19
Dependent Claim
18 words
The vacuum cleaner filter bag of claim 14 wherein the filter web ratio (I) is greater than 200.
Claim 20
Dependent Claim
18 words
The vacuum cleaner filter bag of claim 14 wherein the filter web ratio (I) is greater than 1,000.
Claim 21
Dependent Claim
22 words
The vacuum cleaner filter bag of claim 14 wherein the charged fibers of the nonwoven filter web have a charge enhancing additive.
Claim 22
Dependent Claim
35 words
The vacuum cleaner filter bag of claim 14 wherein the charged fibers of the nonwoven filter web have a charge enhancing additive at a weight percent of 0.2 to 10 percent of the charged fibers.
Claim 23
Dependent Claim
17 words
The vacuum cleaner filter bag of claim 21 wherein the charge enhancing additive comprises a hindered amine.
Claim 24
Dependent Claim
24 words
The vacuum cleaner filter bag of claim 14 wherein the filter web has a pressure drop of less than 10 mm H 2 O.
Claim 25
Dependent Claim
24 words
The vacuum cleaner filter bag of claim 14 wherein the filter web has a pressure drop of less than 6 mm H 2 O.
Claim 26
Dependent Claim
23 words
The vacuum cleaner filter bag of claim 14 wherein the filter web has a charge level of at least 5 μC/m 2 .
Claim 27
Dependent Claim
49 words
The vacuum cleaner filter bag of claim 21 wherein the charge enhancing additive comprises a thermally stable organic compound or oligomer containing at least one perfluorinated moiety nor thermally stable organic triazine compounds or oligomers containing at least one nitrogen atom in addition to those of the triazine group.
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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) | 2003-12-05 | 2004-06-05 | 2004-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-12-05 | 2008-06-05 | 2008-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-12-05 | 2012-06-05 | 2012-12-05 | $7700.00 | Window Closed / Lapsed |