[go: up one dir, main page]

WO2002038849A1 - Appareil de nettoyage au dioxyde de carbone a panier tournant et entrainement externe - Google Patents

Appareil de nettoyage au dioxyde de carbone a panier tournant et entrainement externe Download PDF

Info

Publication number
WO2002038849A1
WO2002038849A1 PCT/US2000/030706 US0030706W WO0238849A1 WO 2002038849 A1 WO2002038849 A1 WO 2002038849A1 US 0030706 W US0030706 W US 0030706W WO 0238849 A1 WO0238849 A1 WO 0238849A1
Authority
WO
WIPO (PCT)
Prior art keywords
seal
carbon dioxide
liquid
cleaning medium
wash vessel
Prior art date
Application number
PCT/US2000/030706
Other languages
English (en)
Inventor
James B. Mcclain
Gary Schrebe
Original Assignee
Micell Technologies, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Micell Technologies, Inc. filed Critical Micell Technologies, Inc.
Priority to PCT/US2000/030706 priority Critical patent/WO2002038849A1/fr
Priority to AU2001214756A priority patent/AU2001214756A1/en
Publication of WO2002038849A1 publication Critical patent/WO2002038849A1/fr

Links

Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F43/00—Dry-cleaning apparatus or methods using volatile solvents
    • D06F43/02—Dry-cleaning apparatus or methods using volatile solvents having one rotary cleaning receptacle only
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F43/00—Dry-cleaning apparatus or methods using volatile solvents

Definitions

  • the present invention concerns washing and dry cleaning apparatus, and particularly concerns dry cleaning apparatus for use with carbon dioxide based dry cleaning systems that employ a rotating basket with an external drive.
  • Non-aqueous cleaning apparatus known as "dry cleaning” apparatus
  • Dry cleaning employs an organic solvent such as perchloroethylene in place of an aqueous system. Dry cleaning apparatus is not, in general, employed in the home, and is instead situated at a store or central plant. Problems with convention dry-cleaning systems include the toxic nature of the solvents employed.
  • Carbon dioxide has been suggested as a dry cleaning medium. See, e.g., U.S.
  • Patent No. 4,012,194 to Maffei To date, however, a feasible apparatus for carrying out carbon dioxide cleaning has not been provided.
  • One apparatus is described in
  • U.S. Patent No. 5,267,455 to Dewees et al. describes a dry cleaning system in which carbon dioxide as a cleaning medium is transferred between vessels by means of a second purge gas such as nitrogen.
  • a second purge gas such as nitrogen.
  • the use of multiple pressurized gases makes the system considerably more complex.
  • the system employs a rotating basket, but a disadvantage is that the basket is rotated by means of a magnet coupling.
  • U.S. Patent No. 5,943,721 to Lerette describes a liquified gas dry cleaning system that uses a double mechanical seal.
  • Lerette states at column at column 4 line 57 to column 5 line 15, teaches a pressure on the seal liquid less than that in the wash vessel.
  • Lerette is based upon the position that the seal is capable of "preventing leakage" when the differential pressure across seal faces is less than about 600 psig.
  • the attainment of complete prevention of leakage appears unrealistic, and further raises the risk of wash fluid (containing carbon dioxide) at least leaking through the seal and into the seal liquid. This would expose the seal face to carbon dioxide.
  • a cleaning apparatus adapted for cleaning fabrics, garments and the like with a carbon dioxide cleaning medium is disclosed.
  • the apparatus comprises:
  • seal liquid reservoir (e) a seal liquid reservoir; (f) a seal liquid inlet line connected to the seal liquid reservoir and the double mechanical seal and configured to supply seal liquid to the double mechanical seal; and
  • a pump, compressed gas line, or other pressure supply means operatively associated with the seal liquid reservoir for maintaining the pressure of seal liquid in the double mechanical seal sufficient to seal the rotating shaft when the wash vessel contains a liquid carbon dioxide cleaning medium from escape of cleaning medium around the rotating shaft.
  • Means such as a pump operatively associated with inlet and outlet lines are provided for circulating liquid carbon dioxide cleaning medium through the wash vessel during cleaning of articles therein.
  • a motor or other drive means is operatively associated with the drive shaft for rotating the rotating basket during cleaning of articles therein.
  • the seal liquid is preferably selected to be compatible with ⁇ e.g., soluble in) the cleaning medium.
  • Figure 1 is a schematic view of a carbon dioxide wash vessel with a drive shaft penetrating the back wall thereof, the drive shaft sealed with a double mechanical seal, the double mechanical, along with means for pressurizing the double mechanical seal.
  • Figure 2 is a cross-sectional view of a wash vessel of the present invention, showing the rotating basket therein, along with the double mechanical seal.
  • Figure 3 is a detailed cross sectional view of the wash vessel of Figure 2, showing the bearing cartridge and the double mechanical seal.
  • Figure 4 is an schematic view of a carbon dioxide wash vessel with a drive shaft penetrating the back wall thereof, essentially as disclosed in Figure 1, with an alternate arrangement for pressurizing the double mechanical seal.
  • the apparatus includes a wash vessel 10 having a wall portion 11.
  • a rotating basket 20 is positioned in the wash vessel (see Fig. 2).
  • a drive shaft 21 penetrates the wash vessel wall portion, with the shaft operatively associated with the rotating basket.
  • the shaft is directly connected to the rotating basket in the illustrated embodiment, but could be indirectly connected through gears, belts, chains or other drive means within the wash vessel if desired.
  • a double mechanical seal 12 is connected to the wall portion with the drive shaft passing therethrough.
  • a seal liquid reservoir 13 is connected to the double mechanical seal by a seal liquid inlet line 14 to supply seal liquid to the double mechanical seal via port 33 (Fig. 2).
  • a seal liquid outlet line 15 connected to port 34 is provided to return seal liquid from the double mechanical seal to the reservoir, though the seal liquid outlet line is optional as the seal liquid could be allowed to pass from the seal directly into the wash medium, if desired.
  • a compressed gas line 16 e.g., compressed nitrogen at about 900 to 950 psi for a wash tank at a maximum pressure of about 875 psi
  • a pressure regulator 18 serves as a pressure supply means operatively associated with the seal liquid reservoir for maintaining the pressure of seal liquid in the double mechanical seal sufficient to seal the rotating shaft when the wash vessel contains a liquid carbon dioxide cleaning medium.
  • a separate 1100 psi pressure relief valve 19 serves as a safety valve on the reservoir.
  • the reservoir is supplied with a level sensor (not shown) to insure that a sufficient quantity of seal liquid is maintained therein.
  • a motor 25 external to the wash vessel such as an electric motor, is drivingly connected to drive shaft 21 by means of a belt 26 and drive wheels 27, 28.
  • a bearing cartridge 30 is connected to the wall portion and supports the drive shaft. Note that the double mechanical seal is positioned between the bearing cartridge and the rotating basket. This facilitates removal of the bearing cartridge and servicing of the bearings.
  • any suitable drive means can be employed, including direct drives, gear drives and transmission systems, turbine drives, etc.
  • a drive shaft support in the form of an integrally formed cartridge 29 is connected to the body member back wall external to the double mechanical seal.
  • the cartridge 29 is, in a preferred embodiment, integrally formed from a single piece of steel and contains both the bearing assembly and the double mechanical seal adjacent one another.
  • the shaft is disposed in the cartridge holder to permit rotation of the basket 20 within the body member.
  • the bearing assembly is a cantilevered bearing assembly, and a pair of bearings 31, 32, which may be comprised of ball bearings, roller bearings, sleeve bearings or any other suitable bearing system. Timken tapered roller bearings are preferred. Because the bearing assembly is external to the seal, the bearing assembly may be greased in a conventional manner.
  • the double mechanical seal 12 includes an inner stator 60 and an outer stator 61, and an inner rotor 62 and an outer rotor 63.
  • a internal space 64 between the two stators is in fluid communication with a seal liquid inlet opening 65 (which is comiected to line 14 of Figurel) and a seal liquid outlet opening 66 (which is connected to line 15 of Figure 2).
  • Double mechanical seals are known. See, e.g., Intech International Technical Services, Take the Mystery Out of Mechanical Seals, (1994). Double mechanical seals are available from a variety of sources, such as Flowserve Fluid Sealing Division, Kalamazoo, Michigan, USA.
  • the other path of seal liquid release in both embodiments, is into the wash vessel or tank itself.
  • the flow into the wash vessel is between about .5 to 5 or ten milliliters of seal liquid an hour.
  • An alternate embodiment of the invention where the pressure supply means comprises a pump operatively associated with the seal liquid inlet line is illustrated in Figure 4.
  • the pressure relief valve 19' is a 1000 psi pressure relief valve. Pressure is applied by means of a pump 50 on line 14'. Manual valve 51 is normally open during operation.
  • accumulator 52 Along inlet line 14' there is an accumulator 52, a pressure indicator 53, and a pressure transducer 54.
  • a drain line 55 is supplied with a manual drain valve 56 for emptying seal liquid from the system for servicing and the like.
  • numerous other pressure supply means can be employed in carrying out the present invention, including pumps, compressors, compressed gases and the like, with or without additional components such as accumulators, pressure sensors, valves, etc., with single or multiple lines provided to the double mechanical seal, in a variety of different configurations, to supply pressure to the double mechanical seal. All that is required is that sufficient pressure be provided to the seal liquid within the double mechanical seal to substantially reduce the escape of carbon dioxide cleaning medium from the wash vessel around the drive shaft.
  • the pressure on the seal liquid is sufficient so that, if anything, seal liquid will leak into the wash vessel from the double mechanical seal.
  • the cleaning medium carbon dioxide liquid could be used as the pressure supply means by taking a line of cleaning medium from the pump outlet to the seal liquid reservoir, or by taking a line from the wash tank itself through a piston pump or the like to the seal liquid reservoir.
  • the present invention provides a method of operating a cleaning apparatus adapted for cleaning fabrics, garments and the like with a liquid carbon dioxide cleaning medium, the apparatus comprising a wash vessel having a wall portion, a rotating basket positioned in the wash vessel, and a drive shaft penetrating the wash vessel wall portion, the shaft operatively associated with the rotating basket;.
  • the method comprises providing a double mechanical seal connected to the wall portion with the drive shaft passing therethrough; filling the double mechanical seal with a seal liquid, the seal liquid comprising an organic solvent (or, with respect to the cleaning medium, an organic co-solvent); increasing the pressure in the wash vessel so that articles therein can be cleaned in a liquid carbon dioxide cleaning medium therein; and pressurizing the seal liquid for at least the time when the pressure in the wash vessel is increased, so that the escape of liquid carbon dioxide cleaning medium around the rotating shaft is reduced.
  • the step of increasing the pressure may be carried out by filling the wash vessel with compressed gas, such as carbon dioxide gas, and/or filling the wash vessel with compressed liquid, such as the liquid carbon dioxide wash medium.
  • the step of presssurizing the seal liquid may be carried out continuously (e.g., with pressure on the seal liquid being maintained between wash cycles while the pressure in the wash vessel is reduced to atmospheric pressure, or may be intermittent (e.g., with pressure on the seal liquid being increased when pressure in the wash vessel is increased, and pressure on the seal liquid being reduced when pressure in the wash vessel is reduced).
  • a liquid carbon dioxide cleaning medium is circulated through the wash vessel to clean articles therein in accordance with known techniques, and the basket is rotated by rotating the drive shaft with the external drive motor as illustrated above.
  • the liquid carbon dioxide cleaning medium may, in one preferred embodiment, contain an organic co- solvent, preferably one that is soluble in the liquid carbon dioxide.
  • the cleaning medium also contains a surfactant.
  • the seal liquid is preferably also an organic co-solvent as described herein, and is preferably soluble in the liquid carbon dioxide cleaning medium. Indeed, it is preferable that the surfactant in the cleaning medium (or at least one of the surfactants therein, where multiple surfactants are employed) is soluble in the seal liquid.
  • the present invention can be implemented with any system or means for supplying or circulating a liquid carbon dioxide dry-cleaning medium through the wash vessel, such as described in our copending patent application serial number 09/047,013, filed March 24, 1998, the disclosure of which is incorporated by reference herein in its entirety.
  • Other systems for circulating the liquid carbon dioxide dry-cleaning medium through the wash vessel that can be used in conjunction with or to carry out the present invention include those described in U.S. Patent No. 5,850,747 to Roberts et al., U.S. Patent No. 5,669,251 to Townsend et al., 5,676,705 to Jureller et al., and 5,683,473 to Jureller et al.
  • such systems include a carbon dioxide cleaning medium inlet line connected to the wash vessel (typically at the top thereof), a carbon dioxide drain line 41 connected to said wash vessel (typically at the bottom thereof), and a pump 42 such as a canned motor pump (preferably a centrifugal pump) interconnecting the outlet line and the inlet line for circulating liquid carbon dioxide cleaning medium through the wash vessel.
  • a lint filter and/or a carbon filter 43 are preferably positioned on the carbon dioxide inlet line, after the pump.
  • both a lint filter and a carbon filter are used, with a by-pass line equipped with valves included to by-pass the carbon filter when detergents or other chemical ingredients are added to the cleaning medium so that they are not removed by the carbon filter.
  • a side-stream of the liquid carbon dioxide cleaning medium can be passed through the bearing cartridge through appropriate piping to cool and lubricate the bearings, particularly where the cleaning medium contains an organic co- solvent that is sufficiently heavy (i.e., has a high flash point) in sufficient amount to serve as a lubricant, though an external bearing cartridge that is simply greased in a conventional manner is currently preferred.
  • any carbon dioxide liquid dry-cleaning medium can be used as the medium in the instant apparatus. See, e.g., U.S. Patent No. 4,012,194 to Maffei.
  • carbon dioxide is supplied by tank, and additional ingredients can be added to the carbon dioxide in the working vessel (which may optionally be supplied with a stirrer to serve as a mixing means therein), in the wash tank, or any other suitable location in the system (or combination thereof).
  • the liquid dry-cleaning medium comprises a mixture of: (a) water, (b) carbon dioxide, (c) surfactant, and, optionally but preferably, (d) an organic co-solvent. After the contacting step, the article is separated from the liquid dry cleaning composition.
  • the liquid dry cleaning composition is at ambient temperature, of about 0° C to 30° C. h one embodiment; the surfactant contains a CO 2 -philic group; in another embodiment, the surfactant does not contain a CO 2 -philic group.
  • a preferred liquid carbon dioxide dry-cleaning medium useful for carrying out the present invention typically comprises: (a) from zero or .1 to 10 percent (more preferably from .1 to 4 percent) water; (b) carbon dioxide (to balance; typically at least 30 percent); (c) surfactant (preferably from .1 or .5 percent to 5 or 10 percent); and (d) from .1 to 50 percent (more preferably 4 to 30 percent) of an organic co- solvent. Percentages herein are expressed as percentages by weight unless otherwise indicated.
  • the medium is provided in liquid form at ambient, or room, temperature, which will generally be between zero and 50° Centigrade. The medium is held at a pressure that maintains it in liquid form within the specified temperature range.
  • the washing or cleaning step is preferably carried out with the liquid medium at ambient temperature within the wash vessel, without extraneous heating or cooling of the wash vessel. All ingredients but for the carbon dioxide can be combined together to provide a detergent formulation, which is then added to the carbon dioxide to provide the dry cleaning medium.
  • the detergent formulation can be used directly as the seal liquid, as discussed below.
  • Any surfactant can be used to carry out the present invention, including both surfactants that contain a CO 2 -philic group (such as described in PCT Application WO96/27704) linked to a CO 2 -phobic group (e.g., a hpophilic group) and surfactants that do not contain a CO 2 -philic group (i.e., surfactants that comprise a hydropl ilic group linked to a hydrophobic (typically hpophilic) group).
  • a single surfactant may be used, or a combination of surfactants may be used. Numerous surfactants are known to those skilled in the art. Examples of suitable surfactants are given in U.S. Patent No.
  • the organic co-solvent is, in general, a hydrocarbon co-solvent.
  • the co-solvent is an alkane co-solvent, with Cio to C 2 o linear, branched, and cyclic alkanes, and mixtures thereof (preferably saturated) currently preferred.
  • the organic co-solvent preferably has a flash point above 140°F, and more preferably has a flash point above 170°F.
  • the organic co-solvent may be a mixture of compounds, such as mixtures of alkanes as given above, or mixtures of one or more alkanes in combination with additional compounds such as one or more alcohols (e.g., from 0 or 0.1 to 5% of a Cl to C15 alcohol (including diols, triols, etc.)).
  • additional compounds such as one or more alcohols (e.g., from 0 or 0.1 to 5% of a Cl to C15 alcohol (including diols, triols, etc.)).
  • dry-cleaning medium various additional ingredients can be included in the dry-cleaning medium, including detergents, bleaches, whiteners, softeners, sizing, starches, enzymes, hydrogen peroxide or a source of hydrogen peroxide, fragrances, etc.
  • the organic co-solvent that is employed as the seal liquid may be selected from the same group as the organic co-solvent described above which are used in the preferred liquid carbon dioxide cleaning medium (although it may be the same as or different from the organic co-solvents incorporated directly into the cleaning medium.
  • a particularly preferred solvent for the seal liquid is ISOPAR MTM organic solvent.
  • the organic co-solvent in said carbon dioxide cleaning medium and the organic co-solvent in said seal liquid are the same; and the liquid carbon dioxide cleaning medium further comprises a surfactant as described above, the seal liquid further comprises a surfactant as described above, and the cleaning medium surfactant and the seal liquid surfactant are the same.
  • the detergent formulation that is added to liquid carbon dioxide to provide the cleaning system described above can be the same formulation that is used as the seal liquid.
  • Articles that can be cleaned by the apparatus of the present invention are, in general, garments and fabrics (including woven and non-woven) formed from materials such as cotton, wool, silk, leather, rayon, polyester, acetate, fiberglass, furs, pelts, canvas, neoprene, etc., formed into items such as clothing, work gloves, tents, parachutes, sails, hats, tapestry, waders, rags, leather goods (e.g., boots, shoes, handbags and brief cases), etc.
  • the term "clean” as used herein refers to any removal of soil, dirt, grime, or other unwanted material, whether partial or complete.
  • the invention may be used to clean nonpolar stains (i.e., those which are at least partially made by nonpolar organic compounds such as oily soils, sebum and the like), polar stains (i.e., hydrophilic stains such as grape juice, coffee and tea stains), compound hydrophobic stains (i.e., stains from materials such as lipstick and candle wax), and particulate soils (i.e., soils containing insoluble solid components such as silicates, carbon black, etc.).
  • nonpolar stains i.e., those which are at least partially made by nonpolar organic compounds such as oily soils, sebum and the like
  • polar stains i.e., hydrophilic stains such as grape juice, coffee and tea stains
  • compound hydrophobic stains i.e., stains from materials such as lipstick and candle wax
  • particulate soils i.e., soils containing insoluble solid components such as silicates, carbon black, etc.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

L'invention concerne un appareil de nettoyage servant à nettoyer des tissus, des vêtements et similaires au moyen d'un fluide de nettoyage à base de dioxyde de carbone. Cet appareil comprend une cuve de nettoyage (10) comportant une partie de paroi (11) ; un panier tournant (20) placé dans la cuve de nettoyage (10) ; un arbre d'entraînement (21) pénétrant la partie de paroi (11) de la cuve de nettoyage (10), l'arbre (21) étant associé de façon opérationnelle au panier tournant (20) ; un double joint mécanique (12) relié à la partie de paroi (11) et traversé par l'arbre d'entraînement (21) ; un réservoir à liquide d'étanchéité (13) ; une conduite d'entrée de liquide d'étanchéité (14) reliée au réservoir à liquide d'étanchéité (13) et au double joint mécanique (12) et conçue pour acheminer le liquide d'étanchéité au double joint mécanique (12) ; et une pompe, une conduite de gaz comprimé (16) ou tout autre moyen d'alimentation en pression associé de façon opérationnelle au réservoir à liquide d'étanchéité (13) de façon à maintenir la pression du liquide d'étanchéité dans le double joint mécanique (12) à un niveau suffisant pour entraîner l'écoulement du liquide d'étanchéité dans la cuve de nettoyage (10) et par là même étanchéifier l'arbre de rotation (21) par rapport à l'écoulement de fluide de nettoyage hors de la cuve de nettoyage (10) lorsque cette dernière contient un fluide de nettoyage à base de dioxyde de carbone liquide. On choisira de préférence un liquide d'étanchéité qui soit compatible avec le fluide de nettoyage.
PCT/US2000/030706 2000-11-08 2000-11-08 Appareil de nettoyage au dioxyde de carbone a panier tournant et entrainement externe WO2002038849A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/US2000/030706 WO2002038849A1 (fr) 2000-11-08 2000-11-08 Appareil de nettoyage au dioxyde de carbone a panier tournant et entrainement externe
AU2001214756A AU2001214756A1 (en) 2000-11-08 2000-11-08 Carbon dioxide cleaning apparatus with rotating basket and external drive

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2000/030706 WO2002038849A1 (fr) 2000-11-08 2000-11-08 Appareil de nettoyage au dioxyde de carbone a panier tournant et entrainement externe

Publications (1)

Publication Number Publication Date
WO2002038849A1 true WO2002038849A1 (fr) 2002-05-16

Family

ID=21741975

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/030706 WO2002038849A1 (fr) 2000-11-08 2000-11-08 Appareil de nettoyage au dioxyde de carbone a panier tournant et entrainement externe

Country Status (2)

Country Link
AU (1) AU2001214756A1 (fr)
WO (1) WO2002038849A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022158927A3 (fr) * 2021-01-25 2022-09-01 Lg Electronics Inc. Lave-linge

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5267455A (en) * 1992-07-13 1993-12-07 The Clorox Company Liquid/supercritical carbon dioxide dry cleaning system
EP0679753A2 (fr) * 1994-04-29 1995-11-02 Hughes Aircraft Company Nettoyage à sec de vêtements utilisant comme produits de nettoyage du dioxyde de carbone liquide en agitation
US5669251A (en) * 1996-07-30 1997-09-23 Hughes Aircraft Company Liquid carbon dioxide dry cleaning system having a hydraulically powered basket
WO1999034051A1 (fr) * 1997-12-24 1999-07-08 Alliance Laundry Systems Llc Machine de nettoyage a sec possedant une commande d'agitation
US5943721A (en) * 1998-05-12 1999-08-31 American Dryer Corporation Liquified gas dry cleaning system
WO1999049122A1 (fr) * 1998-03-24 1999-09-30 Micell Technologies, Inc. Appareil de nettoyage
US6182318B1 (en) * 1997-12-24 2001-02-06 Alliance Laundry Systems Llc Liquified gas dry-cleaning system with pressure vessel temperature compensating compressor

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5267455A (en) * 1992-07-13 1993-12-07 The Clorox Company Liquid/supercritical carbon dioxide dry cleaning system
EP0679753A2 (fr) * 1994-04-29 1995-11-02 Hughes Aircraft Company Nettoyage à sec de vêtements utilisant comme produits de nettoyage du dioxyde de carbone liquide en agitation
US5669251A (en) * 1996-07-30 1997-09-23 Hughes Aircraft Company Liquid carbon dioxide dry cleaning system having a hydraulically powered basket
WO1999034051A1 (fr) * 1997-12-24 1999-07-08 Alliance Laundry Systems Llc Machine de nettoyage a sec possedant une commande d'agitation
US6182318B1 (en) * 1997-12-24 2001-02-06 Alliance Laundry Systems Llc Liquified gas dry-cleaning system with pressure vessel temperature compensating compressor
WO1999049122A1 (fr) * 1998-03-24 1999-09-30 Micell Technologies, Inc. Appareil de nettoyage
US6049931A (en) * 1998-03-24 2000-04-18 Micell Technologies, Inc. Cleaning apparatus
US5943721A (en) * 1998-05-12 1999-08-31 American Dryer Corporation Liquified gas dry cleaning system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022158927A3 (fr) * 2021-01-25 2022-09-01 Lg Electronics Inc. Lave-linge

Also Published As

Publication number Publication date
AU2001214756A1 (en) 2002-05-21

Similar Documents

Publication Publication Date Title
US6233772B1 (en) Carbon dioxide cleaning apparatus with rotating basket and external drive
US5412958A (en) Liquid/supercritical carbon dioxide/dry cleaning system
US6314601B1 (en) System for the control of a carbon dioxide cleaning apparatus
US6711773B2 (en) Detergent injection methods for carbon dioxide cleaning apparatus
AU2002256275B9 (en) Cleaning system utilizing an organic cleaning solvent and a pressurized fluid solvent
US6442980B2 (en) Carbon dioxide dry cleaning system
ES2270877T3 (es) Sistema de limpieza utilizando un solvente de lavado organico y un solvente fluido presurizado.
US6332342B2 (en) Methods for carbon dioxide dry cleaning with integrated distribution
WO1999010585A1 (fr) Procedes et compositions pour le nettoyage a sec
WO2002038849A1 (fr) Appareil de nettoyage au dioxyde de carbone a panier tournant et entrainement externe
US6351973B1 (en) Internal motor drive liquid carbon dioxide agitation system
JP2004515560A5 (fr)

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CR CU CZ DE DK DM DZ EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase