# US 8,784,525 B2 · Vacuum cleaner filter bag > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,784,525 B2 - Document ID: US8784525B2 - Status: Granted - Kind: B2 - Application number: 12/667,651 - Filed: 2008-07-03 - Published: 2010-08-26 - Granted: 2014-07-22 - Earliest claimed: 2007-07-06 - Assignees: Eurofilters Holding N.V. - Applicants: Jan Schultink; Ralf Sauer - Inventors: Jan Schultink; Ralf Sauer - Web page: https://patentgrep.com/patent/US8784525B2 ## CPC - B01D 39/1623: {of synthetic origin} - A47L 9/14: Bags or the like; {Rigid filtering receptacles;} Attachment of, or closures for, bags {or receptacles} - B01D 39/1692: {Other shaped material, e.g. perforated or porous sheets} - Y10T 156/10: Methods of surface bonding and/or assembly therefor - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - A47L: DOMESTIC WASHING OR CLEANING (brushes A46B; cleaning quantities of bottles or of other hollow articles of one kind B08B9/00; laundry D06F); SUCTION CLEANERS IN GENERAL (cleaning in general B08) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract The invention relates to a vacuum cleaner filter bag having a composite material comprising a first layer consisting of a netting or a perforated sheet with an air permeability of at least 10,000 l/(m2 s), and a first fiber layer consisting of man-made fibers and/or vegetable fibers and connected to one side of the first layer. ## Claims ### Claim 1 A vacuum cleaner filter bag having a composite material comprising: a first layer consisting of a netting with an air permeability of more than 10,000 l/(m2 s), the netting having a mesh opening of 2 mm to 30 mm and a thickness of 0.1 to 1.5 mm; and a first fibre layer consisting of man-made fibres or vegetable fibres or man-made fibres and vegetable fibres and connected to one side of the first layer. ### Claim 2 (depends on 1) A vacuum cleaner filter bag according to claim 1, wherein the netting is an extruded netting or a woven netting. ### Claim 3 (depends on 1) A vacuum cleaner filter bag according to claim 1, wherein the first layer has a mass per unit area of 5 to 30 g/m2. ### Claim 4 (depends on 1) A vacuum cleaner filter bag according to claim 1, wherein the first layer has an average hole cross-sectional area of 2 to 900 mm2 or an air permeability of at least 11,000 l/(m2 s). ### Claim 5 (depends on 1) A vacuum cleaner filter bag according to claim 1, wherein the first layer has a tensile strength in the machine direction or in the cross direction of 30 to 200 N or a tensile strength elongation in the machine direction or in the cross direction of 10 to 70%. ### Claim 6 (depends on 1) A vacuum cleaner filter bag according to claim 1, wherein the first fibre layer comprises fibres having a maximum fineness of 5 dtex. ### Claim 7 (depends on 1) A vacuum cleaner filter bag according to claim 1, wherein the composite material comprises a second fibre layer made of man-made fibres or vegetable fibres or man-made fibres and vegetable fibres, said second fibre layer being connected to the first layer on the side facing away from the first fibre layer. ### Claim 8 (depends on 1) A vacuum cleaner filter bag according to claim 1, wherein the first or a second fibre layer is thermally bonded to the first layer. ### Claim 9 (depends on 1) A vacuum cleaner filter bag according to claim 1, wherein the first or a second fibre layer comprises a non-woven layer. ### Claim 10 (depends on 1) A vacuum cleaner filter bag according to claim 1, wherein the first or a second fibre layer comprises a non-woven layer consisting of staple fibres. ### Claim 11 (depends on 1) A vacuum cleaner filter bag according to claim 1, wherein the first or a second fibre layer is a dry-laid or wet-laid non-woven layer or an extruded non-woven layer. ### Claim 12 (depends on 1) A vacuum cleaner filter bag according to claim 1, wherein the first fibre layer or a second fibre layer has a mass per unit area of 5 to 60 g/m2. ### Claim 13 (depends on 1) A vacuum cleaner filter bag according to claim 1, wherein the composite consisting of the first layer and the first fibre layer, or of the first layer, the first fibre layer and the second fibre layer, has an air permeability of 2,000 to 12,000 l/(m2s). ### Claim 14 (depends on 1) A vacuum cleaner filter bag according to claim 1, wherein the first layer, the first fibre layer or a second fibre layer define the outermost layer of a bag wall. ### Claim 15 A method of making a composite material for a vacuum cleaner filter bag, comprising the following steps: providing a first layer consisting of a netting with an air permeability of more than 10,000 l/(m2 s), the netting having a mesh opening of 2 mm to 30 mm and a thickness of 0.1 to 1.5 mm; providing, on one side of the first layer, a first fibre layer consisting of man-made fibres or vegetable fibres or man-made fibres and vegetable fibres, and connecting said first layer to said first fibre layer. ### Claim 16 (depends on 15) A method according to claim 15, wherein the connecting step is executed thermally. ### Claim 17 (depends on 15) A method according to claim 15, comprising depositing the first layer on the first fibre layer, or depositing the first fibre layer on the first layer. ### Claim 18 (depends on 15) A method according to claim 15, wherein the netting is an extruded netting or a woven netting. ### Claim 19 (depends on 15) A method according to claim 15, comprising providing the first layer as a layer having a mass per unit area of 5 to 30 g/m2. ### Claim 20 (depends on 15) A method according to claim 15, comprising providing the first layer as a layer having an average hole cross-sectional area of 2 to 900 mm2 or an air permeability of at least 11,000 l/(m2 s). ### Claim 21 (depends on 15) A method according to claim 15, comprising providing the first layer having a tensile strength in the machine direction or in the cross direction of 30 to 200 N or a tensile strength elongation in the machine direction or in the cross direction of 10 to 70%. ### Claim 22 (depends on 15) A method according to claim 15 comprising providing the first fibre layer comprising fibres having a maximum fineness of 5 dtex. ### Claim 23 (depends on 15) A method according to claim 15, further comprising the step of providing a second fibre layer, and wherein the connecting step comprises connecting said second fibre layer to the first layer on the side facing away from the first fibre layer. ### Claim 24 A method according to 16, wherein the connecting step is executed thermally by means of calendering, or by means of an adhesive.