US6045595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust filter bag
Assignee: Carl Freudenberg KG
•
Filing: 1998-07-23
•
Granted: 2000-04-04
•
Expires: 2018-07-23
Abstract
Abstract A dust filter bag made of a fiber layer laminated together with a paper layer, where the fiber layer is composed of polymer fibers and is arranged on the downstream-gas side of the paper layer.
Inventors
- 👤 Ulrich Freudenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:01
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; A; A47; A47L; A47L9/00; A47L9/10; A47L9/14; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/1607; B01D39/1623; B01D39/18; B01D46/00; B01D46/0027; B01D46/0032; B01D46/02; B01D46/023; B32B29/00; B32B29/02; B32B5/02; B32B5/022; B32B7/00; B32B7/04; B32B7/12; D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4374; D04H1/54; D04H1/559; D04H1/58; D04H1/60; D04H13/00; B01D2239/00; B01D2239/06; B01D2239/0604; B01D2239/0618; B01D2239/065; B01D2239/0663; B01D2239/0681; B32B2307/00; B32B2307/70; B32B2307/718; Y; Y10; Y10S; Y10S15/00; Y10S15/08; Y10S55/00; Y10S55/02
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
49 words
A dust filter bag comprising: an outermost, upstream paper layer having an upstream side and a downstream side; and a fiber layer laminated together with the paper layer, wherein the fiber layer is composed of synthetic, polymer fibers and is arranged on the downstream side of the paper layer.
Claim 2
Dependent Claim
49 words
A dust filter bag comprising: an outermost, upstream paper layer having an upstream side and a downstream side; and a fiber layer laminated together with the paper layer, wherein the fiber layer is composed of synthetic, polymer fibers and is arranged on the downstream side of the paper layer.
Claim 3
Dependent Claim
15 words
The dust filter bag as defined by claim 1, wherein the fibers are electrostatically charged.
Claim 4
Dependent Claim
21 words
The dust filter bag as defined by claim 1, wherein the fiber layer comprises a layer of mechanically stable non-woven material.
Claim 5
Dependent Claim
36 words
The dust filter bag as defined by claim 3, wherein the non-woven material is reinforced in that fibers of the non-woven material of which it is composed are connected together by one of interlacing and glue.
Claim 6
Dependent Claim
33 words
The dust filter bag as defined by claim 4, wherein the fiber layer has melted polymer areas and is additionally reinforced in itself and connected with the paper layer by the polymer areas.
Claim 7
Dependent Claim
20 words
The dust filter bag as defined by claim 5, wherein the polymer areas are configured so as to form pockets.
Claim 8
Dependent Claim
20 words
The dust filter bag as defined by claim 5, wherein the polymer areas are structured or distributed in bar form.
Claim 9
Dependent Claim
20 words
The dust filter bag as defined by claim 6, wherein the polymer areas are structured or distributed in bar form.
Claim 10
Dependent Claim
28 words
The dust filter bag as defined by claim 5, wherein the polymer areas are distributed to form dust chambers in the manner of a honeycomb or waffle pattern.
Claim 11
Dependent Claim
28 words
The dust filter bag as defined by claim 6, wherein the polymer areas are distributed to form dust chambers in the manner of a honeycomb or waffle pattern.
Claim 12
Dependent Claim
28 words
The dust filter bag as defined by claim 7, wherein the polymer areas are distributed to form dust chambers in the manner of a honeycomb or waffle pattern.
Claim 13
Dependent Claim
21 words
The dust filter bag as defined by claim 8, wherein the polymer areas penetrate at least partially into the paper layer.
Claim 14
Dependent Claim
21 words
The dust filter bag as defined by claim 9, wherein the polymer areas penetrate at least partially into the paper layer.
Claim 15
Dependent Claim
21 words
The dust filter bag as defined by claim 10, wherein the polymer areas penetrate at least partially into the paper layer.
Claim 16
Dependent Claim
28 words
The dust filter bag as defined by claim 11, wherein one of moisture resistance and continued tear resistance of the paper layer is improved by the polymer areas.
Claim 17
Dependent Claim
28 words
The dust filter bag as defined by claim 12, wherein one of moisture resistance and continued tear resistance of the paper layer is improved by the polymer areas.
Claim 18
Dependent Claim
18 words
The dust filter bag as defined by claim 1, wherein the fiber layer comprises at least two layers.
Claim 19
Dependent Claim
22 words
The dust filter bag as defined by claim 16, wherein the fiber layer has a first layer made of a spun-bonded material.
Claim 20
Dependent Claim
27 words
The dust filter bag as defined by claim 16, wherein the fiber layer comprises a second layer, made of microfibers, that is adjacent to the paper layer.
Claim 21
Dependent Claim
27 words
The dust filter bag as defined by claim 17, wherein the fiber layer comprises a second layer, made of microfibers, that is adjacent to the paper layer.
Claim 22
Dependent Claim
24 words
The dust filter bag as defined by claim 16, wherein the second layer has a surface weight of 5 to 40 g/m 2 .
Claim 23
Dependent Claim
29 words
The dust filter bag as defined by claim 16, wherein the fiber layer, as a whole, has a surface weight of 5 g/m 2 to 50 g/m 2 .
Claim 24
Dependent Claim
29 words
The dust filter bag as defined by claim 21, wherein the fiber layer, as a whole, has a surface weight of 5 g/m 2 to 50 g/m 2 .
Claim 25
Dependent Claim
26 words
The dust filter bag as defined by claim 1, wherein the paper layer has a surface weight of 20 g/m 2 to 100 g/m 2 .
Claim 26
Dependent Claim
26 words
The dust filter bag as defined by claim 16, wherein the paper layer has a surface weight of 20 g/m 2 to 100 g/m 2 .
Claim 27
Dependent Claim
19 words
The dust filter bag as defined by claim 1, wherein the dust filter bag is a vacuum cleaner bag.
References Cited (Backward Citations)
DE635297C
Cited
US4116648A
Cited
US4164400A
Cited
US4257791A
Cited
JPS5567314A
Cited
US4589894A
Cited
US4976858A
Cited
EP0338479A1
Cited
US4917942A
Cited
US5080702A
Cited
US5527429A
Cited
US5244703A
Cited
US5437910A
Cited
US5647881A
Cited
DE19606718A1
Cited
US5667562A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-04-04 | 2003-10-04 | 2004-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-04-04 | 2007-10-04 | 2008-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-04-04 | 2011-10-04 | 2012-04-04 | $7700.00 | Window Closed / Lapsed |