US3323335A - Dry cleaning machine - Google Patents
Dry cleaning machine Download PDFInfo
- Publication number
- US3323335A US3323335A US435525A US43552565A US3323335A US 3323335 A US3323335 A US 3323335A US 435525 A US435525 A US 435525A US 43552565 A US43552565 A US 43552565A US 3323335 A US3323335 A US 3323335A
- Authority
- US
- United States
- Prior art keywords
- solvent
- chamber
- wash
- storage tank
- wash chamber
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Lifetime
Links
- 238000005108 dry cleaning Methods 0.000 title claims description 32
- 239000002904 solvent Substances 0.000 claims description 96
- 238000011084 recovery Methods 0.000 claims description 22
- 238000003860 storage Methods 0.000 claims description 19
- 239000007788 liquid Substances 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000005485 electric heating Methods 0.000 claims description 3
- 230000004044 response Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 17
- 238000001035 drying Methods 0.000 description 12
- 239000003599 detergent Substances 0.000 description 10
- 239000007789 gas Substances 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 230000009977 dual effect Effects 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 4
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 4
- 229910052753 mercury Inorganic materials 0.000 description 4
- 238000009835 boiling Methods 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- CYTYCFOTNPOANT-UHFFFAOYSA-N Perchloroethylene Chemical group ClC(Cl)=C(Cl)Cl CYTYCFOTNPOANT-UHFFFAOYSA-N 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 239000013557 residual solvent Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Images
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
- D06F43/08—Associated apparatus for handling and recovering the solvents
- D06F43/081—Reclaiming or recovering the solvent from a mixture of solvent and contaminants, e.g. by distilling
Definitions
- the principal object of the present invention is to provide a dry cleaning machine in which solvent l-oss is reduced to such a low value as to make the util-ization of these expensive, low-boiling point solvents commercially practicable, and thereby attain the advantages of a considerably shortened dry cleaning cycle.
- Another important object of my invention is to provide a dry cleaning machine which utilizes -a novel drying technique for reducing the solvent loss, characterized by the employment of vacuum :and controlled heat-creating pressure and temperature conditions in which the solvent will boil out of the wash load, combined with a novel solvent purication and recovery system which causes rapid and complete condensation of dry cleaning solvent and separation thereof from entrained air.
- a further important object of my invention is to provide an automatically lubricated du-al pump system for drawing vacuum on the dry cleaning machine herein described, in order to further reduce solvent losses encountered in cyclical operation of such machines.
- FIGURE 1 depicts .a schematic view of the preferred form of my dry cleaning machine
- FIGURE 2 is a diagrammatic view of the heater and temperature control equipment
- FIGURE 3 is a schematic view of an automatic safety lubrication system for the vacuum pumps employed in my dry cleaning machine
- FIGURE 4 is a diagrammatic View of the sequence timing motor and vacuum controlled switches.
- the numeral 11 designates the wash chamber, which is cylindrical, and is designed to withstand vacuum. It is provided with :a seal-tight frontal door. Mounted within this wash chamber 11 is the wash basket 12, having perforated cylindrical wall and being rotatably supported by a sh-aft 13 passing through the back wall of the wash chamber 11.
- a driving mechanism including motor 14 and conventional drive means indicated by dotted line 16, is provided to rotate the -wash basket 12 selectively at pre-determined speeds.
- three selective speeds are; tumbling speed, at which the centrifugal force acting as the wash load is less than the gravitational force; distributing speed, at which the centrifugal force measured at somewhat smaller radius than that of the wash basket is equal to the gravitational force; and extracting speed, at which the centrifugal force is considerably greater than the gravitation-al force acting on the wash load.
- tumbling speed at which the centrifugal force acting as the wash load is less than the gravitational force
- distributing speed at which the centrifugal force measured at somewhat smaller radius than that of the wash basket is equal to the gravitational force
- extracting speed at which the centrifugal force is considerably greater than the gravitation-al force acting on the wash load.
- the electrical heater 18 Secured to the cylindrical wall of the wash basket 12 is the electrical heater 18 which, in the preferred form, consists of a metallic strip wound on the exterior surface of the wash basket and electrically insulated therefrom. lMounted on the wash basket is a thermostat 19, the function of which is to control the drying temperature in the wash chamber.
- the electrical connections of the heater 18 and the thermostat 19 are shown in FIGURE 2 of the drawing,
- the shaft 13 supporting and rotating the wash basket 12 is partially hollow and its outside end portion is provided with four insulated electric slip rings, of which 21 and 22 are connected to the heater 18 and 23 ⁇ and 24 are connected to the 'thermostat 19, by means of insulated and sealed wires passing through the interior of the hollow shaft.
- slip rings receive electrical energy ⁇ from the supply terminals 26 as controlled by the relay 27 which is so constructed that, when the thermostat closes the circuit, due to low temperature, between rings 23 and 24, the relay 27 will be energized assuming the full line position of its contacts and thereby causing the energization of the heater 18.
- the pre-set thermostat 19 will open the circuit between the slip rings 23 and 24, deenergizing the l relay 27 and causing the relay contacts to assume the dotted line position, as a result of which, the heater 18 will be deenergized and the cooling period of the wash chamber started.
- the thermostat thus serves to maintain the temperature of the wash basket within predetermined limits during the period when power is supplied to terminals 26.
- Solvent which is employed in the dry-cleaning cycle is initially stored in storage tank 31 which in its preferred form consists of two compartments 34 and 35 separated by the partition or Weir 36, which permits overflow of solvent from compartment 34 to compartment 35 to separate supernatant water from the heavier solvent in compartment 34. Solvent passes from the storage tank 31 to wash chamber 11 by line 32, controlled by solenoid valve 33 which is normally in closed position.
- a further element of my invention is a still 41 which is provided with hot water coil 42 through which hot water flow is controlled by solenoid valve 43.
- Solvent is dumped from the wash chamber 11 into the still by line 37 provided with valve 38.
- Valve 38 may be a conventional electrically-controlled solenoid valve, but in a preferred embodiment is hydraulically activated by water under pressure introduced -by line 39 as controlled by threefway solenoid valve 40. Utilization of water line pressure of about V20 p.s.i., normally available in drycleaning machine installation, to activate dump valve 38, facilitates more positive closing of this valve than could be achieved unless an expensive solenoid valve were employed, and is especially necessary to ensure positive closing should bits of lint or dirt settle on the valve facing.
- a vapor outlet from the still is provided to pass vaporized solvent by line 44 to the cold water condenser 45 provided with cold water coils 47.
- Vaporized solvent which condenses in the cold -water condenser 4S is returned by line 46 to storage tank 31.
- the cold water ow in coils 47 is controlled by valve 48 responsive to temperature sensor 49 in line 46 so that cold water is passed to the unit only at such times as required by a vapor load in the condensor.
- line 51 provided with solenoid valve 52 is provided to introduce solvent containing supernatant impurities from compartment 35 of storage tank 31 to still 41.
- Line 53 controlled by valve 54 is a pressure equalization line between wash chamber 11 and still 41, the function of which is more fully described hereinafter.
- a detergent dispenser 50 is provided having ll line 55 provided with solenoid valve 56 and dispensing line 57 provided with solenoid valve 58 leading to the wash chamber 11.
- a pressure equalization line S9 controlled by solenoid valve 60 connects the vapor space of the wash chamber 11 and of the detergent dispenser 50.
- Line 55 may be attached to a flexible hose dipping into a container of liquid detergent.
- valve 60 is opened, creating vacuum in detergent dispenser 50 which is then lled with a charge of detergent drawn up by vacuum upon opening of valve 56.
- Valve 56 is then closed, and all or a portion of the detergent charge in detergent dispenser 501 introduced into the wash chamber by line 57, upon opening of valve 58.
- Recovery chamber 61 which is so constructed as to enable operation at somewhat elevated pressure, for example up to about p.s.i.g. Chamber 61 is provided with inlet vapor line 62 and exit vapor relief valve 63 which can be adjusted to any desired pressure, for example from about 2 to about l0 p.s.i.g.
- Recovery chamber 61 is ⁇ further provided with internal refrigerated coils 64 and baffles 66, the baffles being so arranged as to direct solvent vapor entering by line 62 into contact with coils 64 which are supplied with refrigerant preferably flowing in counter current direction to solvent vapor ow and introduced by line 67 from conventional refrigeration system 68, shown in dotted box, returning thereto by line 69.
- Recovery chamber 61 is designed to have sucient volume so that the vapor velocity in the recovery chamber is less than about 50 linear feet/ minute in order to fully recover solvent from entering vapors and to avoid entrainment of droplets of condensed solvent in the air which exits by valve 63.
- Solvent vapor which condenses in recovery chamber 61 returns by line 71 and line 51 to compartment 35 of storage tank 31.
- solvent vapors which condenses in recovery chamber 61 returns by line 71 and line 51 to compartment 35 of storage tank 31.
- By-pass line 72 provided with solenoid valve 73 is provided to permit a defrost cycle which is advantageously employed for a short period of time prior to start of each 4 drying cycle to remove any frozen solvent or water which has accumulated on the coils 64.
- vacuurn pumping system consisting of two vacuum pumps 81 and 82 which are employed to draw a vacuum on wash chamber 11 by line 83 and to assist in ecient recovery of solvent.
- Pumps 81 and 82 are conventional oil lubricated piston pumps, and are cascaded in tandem in order to enable the attainment of a vacuum in the wash chamber of at least about 28 inches of mercury, and preferably as low as 291/2 inches of mercury.
- line 84 connecting pumps 81 and 82 is provided with bypass line 85 provided with solenoid valve 86, and bypass safety relief valve 90.
- Line 87 provided with check valve 88 is provided to conduct vapor exhaust from pump 82 to still 41.
- filter 89 is provided in line 83.
- vacuum pumps 81 and 82 are provided with automatic oil level control means in order to protect the pumps from bearing failure due to a lack of proper lubrication.
- pump casing 101 is shown having an inlet chamber 102 and outlet chamber 103 and piston means 104.
- the pump casing is partially filled with oil providing splash lubrication of piston driving means 106.
- Exit line 107 of the pump is provided with trap 108 in which exhaust gases are directed in a circular path resulting in Separation of oil droplets entrained in the exhaust gases. Separated oil drains by capillary line 109 to inlet chamber 102,
- An oil reservoir 111 is provided with inlet line 112 and connected by bottom entering pipe 113 to oil feed chamber 114.
- Line 116 provided with check valve 117 permits introduction of oil from feed chamber 114 to pump casing 101.
- the operation of the automatic oil level control means is as follows: In normal operation of the vacuum pump, entrained droplets of oil are continuously separated from the pump exhaust in trap 108 and returned by capillary line 109 to the inlet chamber 102 of the pump, thence passing by drain back to casing 101. Oil feed chamber 114 is under the same vacuum as pump casing 101. When the pump operation is stopped, and atmospheric air admitted to chamber 102, pump casing 101 reaches latmospheric pressure, but operation of check valve 117 prevents loss of vacuum in oil feed chamber 114. Consequently, the pressure in casing 101 applied by line 112 to oil reservoir 111 results in transfer of oil from oil reservoir 111 by line 113 to oil feed chamber 114.
- FIGURE 4 is a diagrammatic view of the sequence timing switches and electrical connections which are employed in controlling two important steps in the sequence operation of the dry cleaning machine.
- sequence timing motor 121 receives electrical energy from supply terminals 122 as controlled by switches 123, 124, 125 and 126.
- Switch 125 is responsive to pre-set vacuum in wash chamber 11 and is herein referred to as the leak sensor switch.
- Switch 123 is likewise responsive to pre-set vacuum in chamber 11 and is herein referred to as the dry sensor switch. 'Ihe function of these switches will be described hereinafter.
- switch 125 acts as a safety switch in preventing sequential operations of the machine, including filling of the wash chamber 11 with solvent, unless a proper vacuum is drawn on the Wash chamber, indicating absence of any appreciable leaks, improper sealing of the frontal door, etc.
- valve 86 Upon initiation of the sequence timing motor 121, valve 86 is closed and solenoid valve 33 opened for a predetermined period of time, admitting wash solvent from compartment 34 of storage tank 31 into the wash chamber 11 by line 32, and starting the wash period.
- Detergent contained in detergent dispenser 50 is introduced to wash chamber 11 by opening of valve 58.
- switch 125 opens because of the reduced vacuum in the wash chamber. At this time, however, switch 126 is closed, permitting continued operation of the sequence timing motor.
- the wash basket is rotated at tumbling speed for a predetermined period of time.
- solenoid valve 54 in line 53 connecting Wash chamber 11 and still 41 is opened in order to equalize the pressure in the system, and valve 52 is also opening permittingWater-contaminated solvent to drain from compartment 35 of storage tank 31 to the still by line 51.
- the addition of cold solvent to the still at this time serves the purpose of cooling hot Water coils 42 which may still be hot from previous wash cycles, and thus prevents flashing of solvent and vapor locking of line 37 when solvent is dumped from the wash chamber to the still.
- dump valve 38 in line 37 connecting the wash chamber and still is opened, permitting solvent to drain from the wash chamber, and the wash basket is rotated first at the distribution speed to cause distribution of the load, and then at the extraction speed to mechanically extract solvent from the wash load.
- spinning of the wash basket is stopped for a brief period, e.g. 20 to 30 seconds, to complete draining of solvent from the wash chamber.
- the next period is the drying period, during which the wash basket is rotated at tumbling speed, which may be interrupted for short interv-als by distribution speed.
- all valves on lines leading to the wash chamber are closed and vacuum is applied to the wash chamber by line 83 by operation of vacuum pumps 81 and 82.
- valve 52 is also closed and hot water enters coils 42 by opening of valve 43 permitting distillation of solvent in still 41 to begin.
- Check valve 8S prevents passage of vapor from the still to the pressure side of pumps 81 and 82.
- switch 126 opens thus preventing energization of the sequence timing motor 121 until such time as sulcient vacuum is attained in chamber 11 to activate dry sensor switch 123.
- switch 123 is set to close at a vacuum somewhat less than the best vacuum attainable with the vacuum pump system. Activation of switch 123 thus will not occur until substantially all solvent lvapor has been removed from wash chamber 11.
- timing motor 121 Upon closing of switch 123, e.g. upon reaching a vacuum of 28 inches of mercury in Wash chamber 11 sequence timing motor 121 is activated and solenoid valve 91 is opened, providing a controlled stream of air into the Wash chamber. The air coming in through valve 91 displaces solvent vapor remaining in the wash chamber and thus removes final traces of solvent vapor by evacuation through the pumping system.
- Pump 82 fully removes all liquid solvent from pump 81, and line 84, any residual solvent remaining being trapped in pump 82.
- solenoid valve 92 is closed, land any solvent remaining in pump 82 is conserved until the next drying cycle, pump 81 being used alone for initial evacuation of the wash chamber.
- Condensed solvent during the drying cycle, is returned continuously from recovery chamber 61 to chamber 35 by lines 71 and 51.
- final traces of solvent and water vapor evaporate from the still 41 to provide the cold solvent reserve in compartment 35 which is employed in the first stage of the subsequent cycle, whereupon valve 43 closes to cut off the hot water supply to coils 42.
- the dry cleaning machine described herein is particularly suited for the recovery of maximum amounts of expensive dry cleaning solvent, while avoiding all conditions of vapor and/or liquid blockage in the vapor and liquid transfer lines which could interfere with smooth operation of the machine.
- the condensation of exhaust vapors from the vapor space of a solvent recovery chamber is particularly advantageous in this respect, since the passage 7 of refrigerated (possibly frozen) solvent through'narrow lines or slaughters is avoided.
- the utilization of a dual pump system to provide vacuum and to avoid loss of solvent by blowing vapors into the ai-r is particularly useful in reducing solvent losses to a minimum.
- the simplicity of operation and ease of control of necessary hot and cold water utilities makes the machine eminently suitable for coin-operation with minimum attention by an attendant.
- a dry cleaning machine comprising a storage tank containing cleaning solvent; a wash chamber communieating with said storage tank by means of a pipe connection and a valve which is closed and is operated in response to pressure in said chamber; a wash basket having perforated Wall rotatably mounted within said wash chamber; driving means adapted to rotate said Wash basket at preselecfedspeed; electric heating means mounted on said wash basket; an electric supply for energizing said heating means as controlled by a thermostat creating alternating heating and cooling periods so as to maintain the temperature in said wash chamber between predetermined limits; a still communicating with said wash chamber and having an outlet for vaporized solvent; condensing means adapted to return condensed solvent vaporized from the still to the storage tank; said storage tank having a vapor outlet communicating with a vapor recovery chamber provided with refrigerating means and an exhaust port opening into the atmosphere; means for returning liquid solvent from the recovery chamber to the storage tank, vacuum pump means for evacuating the wash chamber, said vacuum pump means being adapted to conduct solvent vapor from the wash chamber to
- a dry cleaning machine comprising a storage tank containing cleaning solvent; a wash chamber communicating with said storage tank by means of a pipe connection and ya valve which is closed and is operated in response to pressure in said chamber; a wash basket having perforated wall rotatably mounted within said wash chamber; driving means adapted to rotate said wash basket at pre-selected speed; electric heating means mounted on said Wash basket; and electric supply for energizing said heating means as controlled by a thermostat creating alternating heating and cooling periods so as to maintain the temperature in said wash chamber between predetermined limits; a still communicating with said wash chamber and having an outlet for vaporized solvent; condensing means adapted to return condensed solvent vaporized from the still to the storage tank; said storage tank having a vapor outlet communicating with a vapor recovery chamber provided with refrigerating means and an exhaust port opening into the atmosphere; means for returning liquid solvent from the recovery chamber to the storage tank, vacuum pump means for evacuating the Wash chamber, said vacuum pump means being adapted to conduct solvent vapor from the wash chamber to the still
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US435525A US3323335A (en) | 1965-02-26 | 1965-02-26 | Dry cleaning machine |
FR50179A FR1468562A (fr) | 1965-02-26 | 1966-02-18 | Machine de nettoyage à sec |
DE19661610939 DE1610939A1 (de) | 1965-02-26 | 1966-02-25 | Trockenreinigungsmaschine |
GB8525/66A GB1101430A (en) | 1965-02-26 | 1966-02-25 | Dry cleaning machine |
AT181066A AT274721B (de) | 1965-02-26 | 1966-02-25 | Rückgewinnungskammer zum Rückgewinnen von flüssigem Lösungsmittel aus Lösungsmitteldampf |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US435525A US3323335A (en) | 1965-02-26 | 1965-02-26 | Dry cleaning machine |
Publications (1)
Publication Number | Publication Date |
---|---|
US3323335A true US3323335A (en) | 1967-06-06 |
Family
ID=23728746
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US435525A Expired - Lifetime US3323335A (en) | 1965-02-26 | 1965-02-26 | Dry cleaning machine |
Country Status (4)
Country | Link |
---|---|
US (1) | US3323335A (de) |
AT (1) | AT274721B (de) |
DE (1) | DE1610939A1 (de) |
GB (1) | GB1101430A (de) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3771334A (en) * | 1971-09-29 | 1973-11-13 | H Quackenbush | Dry cleaning machine |
US3990273A (en) * | 1974-06-01 | 1976-11-09 | Hoechst Aktiengesellschaft | Apparatus for cleaning textiles, leather and furs by means of organic solvents, and for working up the solvent |
US4086705A (en) * | 1977-04-01 | 1978-05-02 | Wehr Robert L | Dry cleaning system with solvent recovery |
US4421158A (en) * | 1981-05-14 | 1983-12-20 | Kirchner Robert D | Coolant recirculation system for dry cleaning plants |
US20150176168A1 (en) * | 2013-12-24 | 2015-06-25 | Dongbu Daewoo Electronics Corporation | Method for controlling drum type washing machine |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2573449A1 (fr) * | 1984-11-16 | 1986-05-23 | Frimair Sa | Procede et machine pour nettoyer a sec des articles textiles |
IT1269091B (it) * | 1994-03-31 | 1997-03-21 | Renzacci Spa | Metodo per il lavaggio a secco di biancheria con solvente idrocarburico non alogenato |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR383794A (fr) * | 1907-10-21 | 1908-03-17 | Jean Jules Giraud | Installation pour le nettoyage à sec |
US2198412A (en) * | 1935-01-02 | 1940-04-23 | Engineering Inc | Removal and recovery of solvent |
US2633646A (en) * | 1950-07-06 | 1953-04-07 | Maytag Co | Method and means of drying clothes |
US3238750A (en) * | 1962-08-27 | 1966-03-08 | Robert R Candor | Laundry machine |
-
1965
- 1965-02-26 US US435525A patent/US3323335A/en not_active Expired - Lifetime
-
1966
- 1966-02-25 DE DE19661610939 patent/DE1610939A1/de active Pending
- 1966-02-25 GB GB8525/66A patent/GB1101430A/en not_active Expired
- 1966-02-25 AT AT181066A patent/AT274721B/de active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR383794A (fr) * | 1907-10-21 | 1908-03-17 | Jean Jules Giraud | Installation pour le nettoyage à sec |
US2198412A (en) * | 1935-01-02 | 1940-04-23 | Engineering Inc | Removal and recovery of solvent |
US2633646A (en) * | 1950-07-06 | 1953-04-07 | Maytag Co | Method and means of drying clothes |
US3238750A (en) * | 1962-08-27 | 1966-03-08 | Robert R Candor | Laundry machine |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3771334A (en) * | 1971-09-29 | 1973-11-13 | H Quackenbush | Dry cleaning machine |
US3990273A (en) * | 1974-06-01 | 1976-11-09 | Hoechst Aktiengesellschaft | Apparatus for cleaning textiles, leather and furs by means of organic solvents, and for working up the solvent |
US4086705A (en) * | 1977-04-01 | 1978-05-02 | Wehr Robert L | Dry cleaning system with solvent recovery |
US4421158A (en) * | 1981-05-14 | 1983-12-20 | Kirchner Robert D | Coolant recirculation system for dry cleaning plants |
US20150176168A1 (en) * | 2013-12-24 | 2015-06-25 | Dongbu Daewoo Electronics Corporation | Method for controlling drum type washing machine |
US9518353B2 (en) * | 2013-12-24 | 2016-12-13 | Dongbu Daewoo Electronics Corporation | Method for controlling drum type washing machine |
Also Published As
Publication number | Publication date |
---|---|
GB1101430A (en) | 1968-01-31 |
DE1610939A1 (de) | 1972-03-02 |
AT274721B (de) | 1969-09-25 |
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