US3914107A - Cleansing by laundering and like processes - Google Patents

Cleansing by laundering and like processes Download PDF

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Publication number
US3914107A
US3914107A US371892A US37189273A US3914107A US 3914107 A US3914107 A US 3914107A US 371892 A US371892 A US 371892A US 37189273 A US37189273 A US 37189273A US 3914107 A US3914107 A US 3914107A
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Prior art keywords
alkali
cooling
detergent
wash liquor
cycle
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US371892A
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English (en)
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Christopher Ian Arthur Ellis
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Individual
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Individual
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    • 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

  • This invention relates to a method of cleansing by SOAP REJECT S/G- LATHER LOOP RATE OF CHANGE RINSE LOOP 5 PIN WASH WASH 1 2 LA MP DRIVERS S PUMP(CELL)ORIVERS COUNTER FT REGISTER 37 BIT DE CODE RS CON TROL (CELL FOUL D) laundering or like processes of a load of materials and- /or articles made from polyester-cotton, synthetic fibres, blends of synthetic fibres and natural fibres which have been treated in such a way as to impart a non-iron or minimum iron finish thereto.
  • the method is concerned with cleansing without detrimentally or seriously affecting such finishes.
  • a cleansing method which includes the step of continuously sensing conditions of the wash liquor during a cooling cycle of the process between the washing and rinsing cycles, and controlling the progress thereof by reference to said conditions to obtain a graded and stepped cooling pattern.
  • the step essentially consists of continuously measuring the rate of cooling of the wash liquor and load and maintaining a predetermined rate of change, continuously monitoring the alkali and detergency values of the wash liquor and automatically introducing further alkali and/or detergent into the wash liquor in response to a reading below a predetermined value to maintain the alkali and detergent concentration above the predetermined value, and continuously determining the level of the wash liquor within the vessel and adjusting it upon the addition of cooling water, alkali and/or detergent to maintain it at a predetermined level, the temperature, alkali and detergency monitors being operable to a temperature below the thermal barrier of the material or articles being laundered.
  • the present invention relates to a method of cleansing by laundering and like processes articles and materials made from polyester-cotton, synthetic fibres, blends of synthetic fibres, and natural fibres which have been treated in such a way as to impart a non'iron or minimum iron finish.
  • a rinsing period is commenced which removes the chemical re-agents used in the washing period of the cleansing cycle.
  • the rinsing period is normally carried out with cold water and the wash load is subject to a sudden and considerable drop in temperature.
  • This invention is directed to the treatment of materials and/or articles defined as being of polyester-cotton, synthetic fibres (often termed man-made fibres), blends of such fibres and natural fibres, as well as natural fibres which have been treated in such a way as to impart a non-iron or minimum-iron finish.
  • materials and/or articles will have that meaning.
  • a method of cleansing by laundering or like processes of a load of materials or articles as hereinbefore defined includes the step of continuously sensing conditions of the wash liquor during a cooling cycle of the process between the washing cycle and the rinsing cycle and controlling the progress thereof by reference to said conditions to obtain a graded and stepped cooling pattern, said step comprising continuously measuring the rate of cooling of the wash liquor and load and maintaining a predeterminedrate of change, continuously monitoring the alkali and detergency values of the wash liquor and automatically introducing further alkali and/or detergent into the wash liquor in response to a reading below a predetermined value to maintain the alkali and detergent concentration above the predetermined value, and
  • a method of controlling the process of arriving at the end of the washing cycle prior to rinsing is substantially the same as that described and claimed in the Applicants prior British Patent Specification No. 927,846.
  • the washing liquor suspends all the soiling matter which has been removed from the articles being laundered. It is essential therefore that the suspending power of the liquor is maintained or the soiling matter held in suspension in the wash liquor will be re-deposited on the articles being laundered as dilution of the wash liquor takes place when controlled additions of cold water are made during the cooling cycle. If the suspending power of the wash liquor is reduced a poor standard of processed work is obtained owing to redisposition of the soiling matter on the load. To prevent this, whilst cooling is taking place the alkali and detergency levels are continuously monitored. If either or both of these levels fall below a predetermined standard then further additions of alkali and detergent are made until the predetermined standard has again been reached.
  • the rate of cooling of the wash liquor and consequently also the load is continuously monitored and is held at a desired rate of change. During cooling, additions of water are automatically adjusted to maintain the preselected rate of change.
  • a preselected outlet valve or valves is opened when the machine proceeds through its rinsing cycles in the normal manner.
  • the last rinse of a rinsing cycle is of substantially the same condition as that of the incoming water. If it were found that this liquor was suitable as a final rinse liquor then it must be of a similar standard as that of the incoming water. It would therefore be acceptable as a first rinse of a subsequent rinsing cycle.
  • the first or second rinse of the washing cycle may carry substantial quantities of alkali ordetergent and by continuously monitoring these conditions the liquors can be diverted to a further storage tank and reused in the wash of a subsequent washing cycle.
  • Bleach addition can be controlled volumetrically on a timed basis or automaticallyby reference to a conductivity cell signal, or the rate of change of that signal.
  • a further aspect of the invention is that the waste liquors passing from the washing machine go directly into the sewers are of precisely known standards. These can readily be controlled in order to deal with standards laid down by the local authority.
  • control of the entire cleansing cycle is conveniently programmed according to the nature of the materials and/or articles to be laundered and according to the degree of soiling thereof.
  • a range of programme cards each giving a predetermined sequence of operations would be provided, and one typical control sequence would be as follows:
  • a conductivity cell refers to incoming water condition and re-sets for preselected rinsing quality.
  • Drain Machine involves operation of main motor, opening of liquor outlet, and energisation of dip probe.
  • Steps 12 to 15 are for a bleach sequence and are optional. If bleach sequence is not required they are omitted and step 11 is followed directly be step 16.
  • Steps 18 to 20 are for a starch sequence and are optional. If starch sequence is not required they are omitted and step 17 is followed directly by step 21, if an optional sour sequence is required, or step 23 if the sour sequence is not required.
  • step 18 Heat (optional) as step 18 but with outlet closed and inlet controlled by dip probe.
  • Starch (optional) starch is introduced together with optional temperature and level control over a timed period.
  • Steps 21 and 22 are a sour sequence and are optional.
  • step 17 or 20 is followed directly by step 23.
  • Sour (optional) sour is introduced either .volumetrically for a timed period or by reference to a preselected standard controlled by a sensor.
  • FIGURE of the accompanying sheet of drawings is a block diagram of an arrangement wherein the control sequences of a cleansing operation are governed by a solid state binary digital system.
  • the arrangement is such that instructions, given by a programme card consisting of a 37 X 36 bit diode matrix board, are used to control the sequence of operations during the washing and rinse cycles of the process.
  • the programme card selects the following parameters:
  • k The length of time for high speed motor. 1. The selection of outlet valves.
  • Pre Sets 1 The rate of mixing measurement and control for temperature and alkalinity via the rate of change board.
  • the selection of the detergent level is via the pulse generator/counter board.
  • Each of the parameters is compared with preselected standards on the programme card or fixed standard on the pre sets. When all the parameters are satisfied, and only then, the shift register is pulsed on by the clock pulse generatorvia the sequence register control. If any of the measured parameters deviate from the preselected standards the shift register is held until the necessary adjustments have automatically been made and the preselected standards restored, at which time the shift register will be pulsed as previously described.
  • the programme card is designed to select not only the number, of washes but also the parameters of each wash. The control of additional supplies is determined by the programme card. During the rinsing stage the rate of change board governs the length of each rinse and the number of rinses is governed by the selection of the quality of the final rinse via the programme board.
  • the number and content of the programme boards is a matter of customer choice, though whatever the selection the sequences of operations is controlled and governed by the selected parameters of each individual board.
  • the invention is specifically directed to the cooling cycle of a laundering process between the washing and rinsing cycles i.e. to item 9 in the exemplified control sequence given herein.
  • a method of cleansing by laundering and like processes of a load of materials and articles made from polyester-cotton, synthetic fibres, blends of synthetic fibres, and natural fibres which have been treated to impart a finish thereto including the step of continuously sensing conditions during a cooling cycle of said process between the washing cycle and the rinsing cycle and controlling the progress thereof by reference to said conditions to obtain a graded and stepped cooling pattern, said step comprising continuously measuring the rate of cooling of the wash liquor and load and maintaining a predetermined rate of change, continuously monitoring the alkali and detergency values of said wash liquor and automatically introducing further alkali and detergent into said wash liquor in response to a reading below a predetermined value thereby to maintain the alkali and detergent concentration above said predetermined value, and continuously determining the level of said wash liquor within said vessel and adjusting it upon the addition of cooling water, alkali and detergent to maintain it at a predetermined level, the temperature, alkali and detergency monitors being operable to a temperature below the thermal barrier of the material and articles

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Detergent Compositions (AREA)
US371892A 1972-06-21 1973-06-20 Cleansing by laundering and like processes Expired - Lifetime US3914107A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2897972A GB1439602A (enrdf_load_stackoverflow) 1972-06-21 1972-06-21

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US3914107A true US3914107A (en) 1975-10-21

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GB (1) GB1439602A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4410329A (en) * 1981-11-06 1983-10-18 General Electric Company Washing machine with oversuds detection and correction capability
US5396413A (en) * 1992-01-13 1995-03-07 Hitachi, Ltd. Method of controlling amenity products or rotating machines

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2189520A (en) * 1986-03-21 1987-10-28 Unilever Plc Washing and bleaching process

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2430668A (en) * 1941-06-16 1947-11-11 American Machine & Metals Washing machine and automatic control mechanism therefor
US3013572A (en) * 1957-05-17 1961-12-19 Dunn Engineering Associates In Dry cleaning devices
US3170314A (en) * 1963-08-12 1965-02-23 Gen Electric Washing system for economizing on water usage
US3550170A (en) * 1968-09-26 1970-12-29 Maytag Co Method and apparatus for fabric cool down
US3610001A (en) * 1969-05-05 1971-10-05 Pellerin Corp Milnor Washing machine with slow cooldown feature

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2430668A (en) * 1941-06-16 1947-11-11 American Machine & Metals Washing machine and automatic control mechanism therefor
US3013572A (en) * 1957-05-17 1961-12-19 Dunn Engineering Associates In Dry cleaning devices
US3170314A (en) * 1963-08-12 1965-02-23 Gen Electric Washing system for economizing on water usage
US3550170A (en) * 1968-09-26 1970-12-29 Maytag Co Method and apparatus for fabric cool down
US3610001A (en) * 1969-05-05 1971-10-05 Pellerin Corp Milnor Washing machine with slow cooldown feature

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4410329A (en) * 1981-11-06 1983-10-18 General Electric Company Washing machine with oversuds detection and correction capability
US5396413A (en) * 1992-01-13 1995-03-07 Hitachi, Ltd. Method of controlling amenity products or rotating machines

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Publication number Publication date
GB1439602A (enrdf_load_stackoverflow) 1976-06-16

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