# US 7,744,680 B2 · Vacuum-cleaner bag and method for extending the service life of vacuum-cleaner bags > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,744,680 B2 - Document ID: US7744680B2 - Status: Granted - Kind: B2 - Application number: 10/582,651 - Filed: 2004-12-17 - Published: 2007-06-14 - Granted: 2010-06-29 - Earliest claimed: 2003-12-19 - Assignees: Eurofilters N.V. - Inventors: Jan Schultink; Ralf Sauer - Web page: https://patentgrep.com/patent/US7744680B2 ## CPC - A47L 9/14: Bags or the like; {Rigid filtering receptacles;} Attachment of, or closures for, bags {or receptacles} - B01D 39/02: Loose filtering material, e.g. loose fibres - B01D 39/04: Organic material, e.g. cellulose, cotton - B01D 39/1623: {of synthetic origin} - B01D 39/18: the material being cellulose or derivatives thereof ({cork or peat B01D39/1646} ; making filter paper D21F11/14) - Y10S 55/02: Vacuum cleaner bags - 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) - 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) - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ## Abstract Described is a vacuum-cleaner bag which is made of an air-permeable filter material and forms a closed dust-collecting chamber, the vacuum-cleaner bag containing a material which can be whirled up under a given air flow. ## Claims ### Claim 1 A vacuum cleaner bag, comprising of: an air-permeable filter material disposed inside the vacuum cleaner bag, wherein the bag includes, per 1000 cm3 volume, between 1 and 30 g of the material which is whirled up under an air flow, the material being whirled up having a volume per mass unit between 5 cm3/g to 100 cm3/g, and wherein the material being whirled up is kept in circulation under the air flow in an operating state to bind sucked-in dust already in the vacuum cleaner bag. ### Claim 2 (depends on 1) The vacuum-cleaner bag according to claim 1, wherein the material includes at least one of fibres and flakes. ### Claim 3 (depends on 2) The vacuum-cleaner bag according to claim 2, wherein the fibres are at least one of chemical fibres and natural fibres. ### Claim 4 (depends on 3) The vacuum-cleaner bag according to claim 3, wherein the chemical fibres are cellulose fibres. ### Claim 5 (depends on 3) The vacuum-cleaner bag according to claim 3, wherein the chemical fibres are at least one of viscose fibres and synthetic fibres. ### Claim 6 (depends on 4) The vacuum-cleaner bag according to claim 4, wherein the synthetic fibres are selected from fibres formed from at least one of polyolefins, polyester, polyamides, polyacrylonitrile and polyvinyl alcohol. ### Claim 7 (depends on 3) The vacuum-cleaner bag according to claim 3, wherein the natural fibres are selected from at least one of cellulose, wood fibre materials, kapok, flax, jute, Manila hemp, coco, wool, cotton, Kenaf, abaca, mulberry bast and fluff pulp. ### Claim 8 (depends on 2) The vacuum-cleaner bag according to claim 2, wherein the fibres at least one of (i) are at least one of charged and triboelectric fibre mixtures and (ii) form a triboelectric combination in combination with a filter medium of a dust-collecting filter. ### Claim 9 (depends on 2) The vacuum-cleaner bag according to claim 2, wherein the fibres at least one of (i) are at least one of smooth, branched, crimped, hollow and textured and (ii) have a non-circular cross-section. ### Claim 10 (depends on 2) The vacuum-cleaner bag according to claim 2, wherein the fibres have a trilobal cross-section. ### Claim 11 (depends on 2) The vacuum-cleaner bag according to claim 2, wherein the fibres have a mean length of between 0.3 mm and 100 mm. ### Claim 12 (depends on 2) The vacuum-cleaner bag according to claim 2, wherein the fibres have a mean length of between 0.5 and 20 mm. ### Claim 13 (depends on 9) The vacuum-cleaner bag according to claim 9, wherein the fibres have a mean length of 1 to 9.5 mm. ### Claim 14 (depends on 2) The vacuum-cleaner bag according to claim 2, wherein the flakes are selected from cellular plastics, non-wovens, textiles, foamed starch, foamed polyolefins, films and recovered fibres. ### Claim 15 (depends on 14) The vacuum-cleaner bag according to claim 14, wherein the flakes have a diameter between 0.3 mm and 30 mm. ### Claim 16 (depends on 14) The vacuum-cleaner bag according to claim 14, wherein the flakes have a diameter between 0.5 and 20 mm. ### Claim 17 (depends on 14) The vacuum-cleaner bag according to claim 14, wherein the flakes have a diameter between 1 and 9.5 mm. ### Claim 18 (depends on 1) The vacuum-cleaner bag according to claim 1, wherein the material is electrostatically charged. ### Claim 19 (depends on 1) The vacuum-cleaner bag according to claim 1, wherein the vacuum-cleaner bag is dimensioned and designed to have a volume flow rate through the bag between 10 m3/h and 400 m3/h. ### Claim 20 (depends on 1) The vacuum-cleaner bag according to claim 1, wherein between 5 and 15 g of the material are contained per 1000 cm3. ### Claim 21 (depends on 1) The vacuum-cleaner bag according to claim 1, wherein the material is at least one of (i) one of a single-layer paper and a multilayer paper and (ii) a non-woven material. ### Claim 22 (depends on 1) A method for extending a service life of a vacuum-cleaner bag which is operated with a predetermined volume flow rate, comprising: utilizing the vacuum-cleaner bag according to claim 1. ### Claim 23 (depends on 22) The method according to claim 22, wherein a working volume flow rate is between 10 m3/h and 400 m3/h. ### Claim 24 (depends on 22) The method according to claim 22, comprising: introducing the material into the vacuum-cleaner bag one of (i) before a start of a first suction process and (ii) at the start of the suction process. ### Claim 25 (depends on 22) The method according to claim 22, wherein the material is present in a wrapper, and comprising: introducing the material into the vacuum-cleaner bag one of (i) before a start of a first suction process and (ii) at the start of the suction process. ### Claim 26 (depends on 25) The method according to claim 25, wherein the wrapper is destroyable at a predetermined volume flow rate. ### Claim 27 (depends on 22) The method according to claim 22, wherein the vacuum cleaner is one of a cylinder vacuum-cleaner and an upright vacuum-cleaner.