EP0404047A1 - Verfahren und Maschine zum Waschen und Trocknen von Textilwaren - Google Patents

Verfahren und Maschine zum Waschen und Trocknen von Textilwaren Download PDF

Info

Publication number: EP0404047A1
Authority: EP; European Patent Office
Prior art keywords: drum; washing; speed; drying; rotation
Prior art date: 1989-06-23
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.): Granted

Application number

EP90111540A

Other languages

English (en)

French (fr)

Other versions

EP0404047B1 (de

Inventor

Pierino Vellati

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Vota Roberto

Original Assignee

Vota Roberto

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.)

1989-06-23

Filing date

1990-06-19

Publication date

1990-12-27

1990-06-19 Application filed by Vota Roberto filed Critical Vota Roberto

1990-12-27 Publication of EP0404047A1 publication Critical patent/EP0404047A1/de

1995-01-18 Application granted granted Critical

1995-01-18 Publication of EP0404047B1 publication Critical patent/EP0404047B1/de

2010-06-19 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

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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
- D06F35/00—Washing machines, apparatus, or methods not otherwise provided for
- D06F35/005—Methods for washing, rinsing or spin-drying
- D06F35/006—Methods for washing, rinsing or spin-drying for washing or rinsing only

Definitions

the present invention concerns a process and a machine for washing and/or drying textile products, and namely "very delicate" textile products, i.e. those liable to dimensional shrinkage due to felting and/or relaxation, that up to now could be washed only by hand.
washing-machines are mainly used to wash in a water medium clothes and linen, and they essentially comprise a rotating drum housed in a water tight bowl and connected to an electric motor which has said drum rotate about its own longitudinal axis.
the motor is controlled for actuation by a programmer where the washing cycles or programmes are previously set; said programmes comprise at least one of the following stages: pre-washing, washing, rinsing, spinning, drying.
a detersive solution in water is used, the water being generally heated by a resistor, and the drum is rotated at a preselected speed, causing a motion which replaces the manual mechanical action; said motion provides for the partial lifting of the articles of clothing to be washed along the drum walls until they fall down on the bottom of the drum itself, in that the acceleration of gravity exceeds the centrifugal acceleration caused by the drum rotation.
pure water is used or possibly additioned with products such as softening, blueing, sizing agents, etc.
water is almost completely eliminated from the washed articles which, in the latest models of washing-machines, are then completely dried in the drying stage by means of hot air.
washing-machines lies in the fact that the above reported type of washing, which is the most commonly used, is extremely damaging for all those textile products classified as “very delicate", and specially for knitted articles, in that they are particularly liable to size shrinkage due to felting (i.e. those articles made of wool, mohair, cashmere, alpaca, camel, etc.) and/or size shrinkage due to relaxation occurring in products made of any type of textile fibres.
Object of the present invention is to solve the aforesaid problems by means of a process and a machine for washing and/or drying textile articles, especially the "very delicate” ones, that reduces and limit within acceptable values size shrinkage due to felting and/or relaxation of the treated items.
the present invention provides a process for washing and/or drying textile products, of the type using an automatic or semi-automatic washing and/or drying machine provided with a rotating drum, characterized in that during at least part of one or more stages of the washing cycle, and/or during drying, said drum is rotated at an angular speed equal or higher than the lowest speed allowing to hold the products adhering to the drum walls during each drum revolution.
the invention furthermore concerns an automatic or semi-automatic machine for washing and/or drying textile articles of the type provided with a rotating drum, characterized in that it is provided with means to control, during at least part of one or more stages of the washing cycle and/or during drying, the rotation speed of the drum at a value equal to or exceeding the lowest speed allowing to hold said products adhering to the drum walls.
the process and the machine are especially suitable for those textile articles up to now washable only by hand in that liable to size shrinkage due to felting and/or relaxation.
By these process and machine it will be possible to machine wash repeatedly (at least 20 times) all the products up to now washable only by hand, and to avoid size shrinkage, for felting and/or relaxation, exceeding 10% in area (a value deemed as the maximum acceptable one with respect to wearability).
angular speed ⁇ or of centrifugal acceleration will vary depending on the radius r of the drum of the washing-machine.
the preferred speed and acceleration will be those corresponding to a speed of rotation of the drum within the range from about 80 to about 240 revolutions per minute.
Said speed of rotation is similar to the speed used, in some of the latest models of washing-machines, during the stage of pre-spinning in order to obtain a uniform distribution of the load, but, unlike the latter ones, it is used during the whole washing cycle and/or during drying; said speed is thus maintained also in the presence of soapy water in the bowl, or vassel, as well.
a speed is preferably used during at least part of the actual washing stage, in order to have every article at least partially soaked at each revolution by the soapy solution in the bowl.
the use of the speed according to the invention provides a cleansing action that is equal and even better than that obtainable according to known washing methods.
the machine will preferably alternate periods of drum rotation at the speed according to the invention to periods of zero speed (steady drum) and/or reduced speed (20-40 revolutions per minute), in order to allow the articles to be differently positioned.
rotations of the drum at high speed are preferably performed, to remove water and/or possible soap and detergent from the articles.
the total time of actual agitation or flapping of the articles i.e. the total amount of the washing and drying cycle periods during which the textile articles are actually lifted and dropped at each drum revolution, is preferably within the range from 20 to 200 seconds.
the washing machine and the washing process according to the invention provide other advantages.
a first advantage consists in the possibility of reducing even by 40% the quantity of water used in each washing cycle.
the saving of water results in a corresponding saving of the electrical power used for heating the water up to a temperature that in a preferred embodiment is within the range from 30 to 40 degrees C.
said saving of water also involves a corresponding saving of detergent.
the detergent used will be of the liquid type with limited foam formation, but a detergent in powder can be used as well.
a typical programme of washing cycle using a process and a machine according to the invention is designed in a way as to have a first washing stage prior to heating at 30-40 degrees C the soapy solution containing the detergent, followed by the washing stage at said temperature, successively followed by 2 or 3 rinsings with cold water.
the washing takes place alternating periods of rotation of the drum at the speed according to the invention to periods of "strong spinning” (250-600 rpm) and to periods of steady drum (zero speed) and/or slow rotation (20-40 rpm) to allow the products change their position in the drum and avoid the formation of folds.
the heating of the soapy solution at the desired temperature (30-40 degrees C) may take place with steady drum or during rotation at a speed according to the invention (80-240 rpm).
the rinsing is carried out twice or three times according to the aforereported concept of alternating rotations at different speeds and pauses; at the end of each rinsing the water is discharged (with steady drum or rotation at 80-240 rpm) and a final high-speed spinning is performed.
the wetting of the products both with soapy solution or with the rinsing water occurs by temporary and at least partial immersion of the products into the bath provided in the bottom area of the drum. Said wetting may be made easier and improved by means of shower or spraying systems (in the machines which are provided with said devices).
the total time of actual agitation, or flapping, of the articles should not exceed 200 seconds.
Figure 1 is a graph showing the different behaviour of a knitted article made of "pure wool” washable only by hand (not treated for "unshrinkability") after a series of washings according to the traditional "delicate-wool" cycle and according to the invention cycle.
the dashed line shows the behaviour of the examined article washed in a household washing-machine with a gentle cycle according to the state of the art, while the continuous line indicates the behaviour of the same article washed with a cycle according to the invention.
the slope of the two curves is dramatically different: the curve of size shrinkage upon a traditional gentle cycle washing (namely with the drum rotating at about 50/60 rpm) reaches the critical value of 10% approximately only after 4-5 washings, while the curve of size shrinkage upon a washing according to the invention attains this value only after 20 washings. Since this value of 20 washings corresponds to the average number of washings which a woollen article undergoes during its life, the process according to the invention allows a woollen product "washable by hand" to be machine washed for the whole length of its average life without being aesthetically damaged or its use being prevented upon extreme size shrinkage.
the short dashed line shows the behaviour of a wool-gentle-cycle (with drum rotation at 50/60 rpm) according to the state of the art, while the continous line shows the behaviour of the washing cycle according to the invention.
the C.F.S. average felting severity of a wool washing cycle
the C.F.S. of the cycle according to the invention is below 0.4%. Thanks to the washing process according to the invention, notwithstanding such a low CFS it is possible to obtain a cleansing efficiency of the articles similar to that obtainable with the known cycles, but with minimal felting.

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Engineering & Computer Science (AREA)
Textile Engineering (AREA)
Treatment Of Fiber Materials (AREA)
Control Of Washing Machine And Dryer (AREA)

EP90111540A 1989-06-23 1990-06-19 Verfahren und Maschine zum Waschen und Trocknen von Textilwaren Expired - Lifetime EP0404047B1 (de)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
IT2096589		1989-06-23
IT8920965A IT1230903B (it)	1989-06-23	1989-06-23	Procedimento e macchina per il lavaggio e/o l'asciugatura di manufatti tessili.

Publications (2)

Publication Number	Publication Date
EP0404047A1 true EP0404047A1 (de)	1990-12-27
EP0404047B1 EP0404047B1 (de)	1995-01-18

Family

ID=11174722

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP90111540A Expired - Lifetime EP0404047B1 (de)	1989-06-23	1990-06-19	Verfahren und Maschine zum Waschen und Trocknen von Textilwaren

Country Status (5)

Country	Link
EP (1)	EP0404047B1 (de)
AT (1)	ATE117385T1 (de)
DE (1)	DE69016105T2 (de)
ES (1)	ES2068946T3 (de)
IT (1)	IT1230903B (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0726349A2 (de) *	1995-02-10	1996-08-14	CANDY S.p.A.	Verfahren zum Waschen in einer Waschmaschine
US5560061A (en) *	1993-03-31	1996-10-01	Bosch-Siemens Hausgeraete Gmbh	Washing machine with a reversing-mode washing drum
WO2004055252A1 (en) *	2002-12-18	2004-07-01	Tonello S.R.L.	Method and machine with rotating drum for the washing or dyeing treatment of textile articles
EP2426249A1 (de)	2005-06-29	2012-03-07	Indesit Company S.p.A.	Haushaltsgerät mit Spannvorrichtung für Textilien
EP2468950A1 (de)	2010-12-27	2012-06-27	Indesit Company S.p.A.	Verfahren und Maschine zum Trocknen von Wäsche
EP1961854B1 (de)	2007-02-26	2017-03-15	Samsung Electronics Co., Ltd.	Waschmaschine und Waschsteuerverfahren dafür
EP2414577B1 (de)	2009-03-31	2017-11-08	LG Electronics Inc.	Waschverfahren

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
IT1308788B1 (it) †	1999-07-05	2002-01-10	Merloni Elettrodomestici Spa	Metodo per il lavaggio di biancheria e macchina atta al lavaggio dibiancheria che implementa tale metodo.
DE102016113723A1 (de)	2016-07-26	2018-02-01	Miele & Cie. Kg	Verfahren zum Behandeln von Wäsche, Verfahren und Vorrichtung zum Betreiben einer Wäschebehandlungsmaschine und Wäschebehandlungsmaschine zum Behandeln von Wäsche

Citations (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2432766A (en) *	1942-04-23	1947-12-16	Apex Electrical Mfg Co	Apparatus for washing clothes
FR1364698A (fr) *	1963-05-13	1964-06-26		Procédé et appareil pour le traitement de tissus, notamment pour le lavage du linge
FR1418870A (fr) *	1963-07-09	1965-11-26	Maytag Co	Dispositif de commande pour machines à laver
US3388410A (en) *	1967-09-11	1968-06-18	Donald E. Marshall	Cleaning apparatus and method
FR2632329A1 (fr) *	1988-06-07	1989-12-08	Ciapem	Procede de lavage du linge de laine, et machine a laver le linge mettant en oeuvre ce procede

1989
- 1989-06-23 IT IT8920965A patent/IT1230903B/it active
1990
- 1990-06-19 EP EP90111540A patent/EP0404047B1/de not_active Expired - Lifetime
- 1990-06-19 ES ES90111540T patent/ES2068946T3/es not_active Expired - Lifetime
- 1990-06-19 AT AT90111540T patent/ATE117385T1/de not_active IP Right Cessation
- 1990-06-19 DE DE69016105T patent/DE69016105T2/de not_active Expired - Lifetime

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2432766A (en) *	1942-04-23	1947-12-16	Apex Electrical Mfg Co	Apparatus for washing clothes
FR1364698A (fr) *	1963-05-13	1964-06-26		Procédé et appareil pour le traitement de tissus, notamment pour le lavage du linge
FR1418870A (fr) *	1963-07-09	1965-11-26	Maytag Co	Dispositif de commande pour machines à laver
US3388410A (en) *	1967-09-11	1968-06-18	Donald E. Marshall	Cleaning apparatus and method
FR2632329A1 (fr) *	1988-06-07	1989-12-08	Ciapem	Procede de lavage du linge de laine, et machine a laver le linge mettant en oeuvre ce procede

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US5560061A (en) *	1993-03-31	1996-10-01	Bosch-Siemens Hausgeraete Gmbh	Washing machine with a reversing-mode washing drum
EP0726349A2 (de) *	1995-02-10	1996-08-14	CANDY S.p.A.	Verfahren zum Waschen in einer Waschmaschine
EP0726349A3 (de) *	1995-02-10	1997-03-26	Candy Spa	Verfahren zum Waschen in einer Waschmaschine
WO2004055252A1 (en) *	2002-12-18	2004-07-01	Tonello S.R.L.	Method and machine with rotating drum for the washing or dyeing treatment of textile articles
EP2426249A1 (de)	2005-06-29	2012-03-07	Indesit Company S.p.A.	Haushaltsgerät mit Spannvorrichtung für Textilien
EP1961854B1 (de)	2007-02-26	2017-03-15	Samsung Electronics Co., Ltd.	Waschmaschine und Waschsteuerverfahren dafür
EP2414577B1 (de)	2009-03-31	2017-11-08	LG Electronics Inc.	Waschverfahren
EP2468950A1 (de)	2010-12-27	2012-06-27	Indesit Company S.p.A.	Verfahren und Maschine zum Trocknen von Wäsche
ITTO20101070A1 (it) *	2010-12-27	2012-06-28	Indesit Co Spa	Procedimento e macchina per l'asciugatura di biancheria

Also Published As

Publication number	Publication date
IT8920965A0 (it)	1989-06-23
ATE117385T1 (de)	1995-02-15
EP0404047B1 (de)	1995-01-18
DE69016105T2 (de)	1995-08-24
IT1230903B (it)	1991-11-08
DE69016105D1 (de)	1995-03-02
ES2068946T3 (es)	1995-05-01

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