EP0343070B1 - Procédé et dispositif pour le lavage du linge en machine avec un produit particulaire - Google Patents

Procédé et dispositif pour le lavage du linge en machine avec un produit particulaire Download PDF

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Publication number
EP0343070B1
EP0343070B1 EP89401366A EP89401366A EP0343070B1 EP 0343070 B1 EP0343070 B1 EP 0343070B1 EP 89401366 A EP89401366 A EP 89401366A EP 89401366 A EP89401366 A EP 89401366A EP 0343070 B1 EP0343070 B1 EP 0343070B1
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EP
European Patent Office
Prior art keywords
bag
process according
washing
orifice
ring
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
Application number
EP89401366A
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German (de)
English (en)
French (fr)
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EP0343070A1 (fr
Inventor
Karl Michael Schumann
B.E. Talkes
C.J. Lowery
J.R. Lickiss
M. Curtis
G. Dickenson
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Procter and Gamble Co
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Procter and Gamble Co
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Publication date
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Priority claimed from FR8806660A external-priority patent/FR2631640B1/fr
Application filed by Procter and Gamble Co filed Critical Procter and Gamble Co
Publication of EP0343070A1 publication Critical patent/EP0343070A1/fr
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    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
    • C11D17/04—Detergent materials or soaps characterised by their shape or physical properties combined with or containing other objects
    • C11D17/041—Compositions releasably affixed on a substrate or incorporated into a dispensing means
    • C11D17/046—Insoluble free body dispenser
    • 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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/02—Devices for adding soap or other washing agents
    • D06F39/024—Devices for adding soap or other washing agents mounted on the agitator or the rotating drum; Free body dispensers

Definitions

  • the present invention belongs to the field of machine washing. It relates to a new washing process making it possible to optimally use the products currently available on the market in solid form, in particular powder, which are used in a washing operation, for example detergents or other special additives having activity during washing.
  • the invention also relates to a device for implementing such a method.
  • Washing is increasingly carried out in machines, using products presented in the form of powder, granules or other solid forms in particles. Washing machines are mainly drum machines but there are also so-called agitator / pulsator machines. Whatever type of machine is used, specialists know that the conditions for using such products are far from optimal. There is indeed a real problem in ensuring a uniform distribution of the particulate product and its dissolution in the washing medium located in the tank of the machine. In the following, the technical problems will be illustrated more particularly in the case of powdered detergents, but it is clear that similar problems arise with detergents presented otherwise as with any additives having activity during washing.
  • compartments or trays are provided for receiving the appropriate quantity of detergent powder before the actual washing operation.
  • the pulverulent active product is supposed to be entrained by the water in the tank of the machine, as the process progresses.
  • the powdered detergent is far from being completely entrained by the water, so that there remain more or less significant residual quantities in the distribution tank. So the expected amount of detergent powder is not actually consumed, which affects the effectiveness of washing.
  • the washing machine tubs are always soiled with residues from previous operations. This difficulty is widely known and is the subject of numerous complaints from users.
  • the detergent particles are colored, so that the colored granules of the detergent dissolve by releasing the dye from the laundry and can then cause stains on the laundry.
  • the detergent composition contains peroxygen compounds, the corresponding granules, for example perborate granules, decompose on contact with the laundry and can discolour the articles of fragile color.
  • the applicant has appealed to the concept of a method according to which a device is first filled with detergent, which is then placed in the machine, with the laundry to be washed. It has, in fact, developed this concept essentially in the case of liquid detergents and, by way of reference to illustrate such a state of the art, mention may be made of patent application FR 34 O6151 filed on April 18, 1984 and published under N ° 2.563.250, having as title: "Washing machine in machine with liquid detergent and device for its application”.
  • the detergent contained in the device gradually diffuses into the washing medium and into the laundry in the machine.
  • the device comprises a filling orifice and vents for the gradual release of the liquid within the laundry during washing.
  • such a device comprises a body capable of being filled with the desired quantity of detergent, removable means for closing off this body, the body or said means having holes or vents for the release of the detergent, said device being characterized in that it comprises means separating the part of the device comprising the holes or vents from the part comprising the particulate detergent, said means being designed to allow the washing water to pass freely and for practically prevent massive and uncontrolled release of particulate detergent.
  • a device structure which has given very interesting practical results has the general appearance of a body of revolution which can be closed by a removable cap, which has holes allowing both the entry of water inside.
  • the device being more particularly characterized in that it comprises at least one plate mounted inside the device for separating the cap and the part of the body containing the particulate detergent, said plate having -even at least one orifice whose surface is less than that of the holes or vents of the cap,
  • the perforated plate makes it possible to retain the particulate detergent in the body of the device while allowing the washing water to come to dissolve this detergent before his release in the washing machine.
  • the present invention provides a solution to these technical problems as well as to others, as will emerge from the description which follows, while fully retaining the benefits of the metering and diffusing devices which it had already proposed for particulate detergents. , in particular those forming the subject of the aforementioned FR patent application.
  • the invention relates to a method for washing machine laundry, according to which a metering and diffusing device of reusable type is filled with a particulate product having activity during washing, this device is placed in the machine with the washing machine. washing and washing is then carried out in the usual manner, characterized in that said device essentially comprises a flexible sheath in the form of a bag extending around at least one mouth, which is delimited by means serving to support the sheath and allows the bag to be filled with the desired quantity of product corresponding substantially to a washing operation and remains at least partially open during washing, the aqueous washing medium penetrating inside the bag at least through the mouth thereof , with a view to the gradual dissolution of the particulate product, the latter thus being gradually released during washing predominantly under f elm of aqueous solution passing at least through the mouth of the bag.
  • the bag is made of a material capable of retaining the particulate product, without letting it pass in solid form, as well as withstanding the washing and drying temperatures of the machine.
  • the material constituting the bag is designed to allow the penetration of the aqueous washing medium through the bag, towards the particulate product which is contained therein, as well as the diffusion of an active aqueous solution, originating from the progressive dissolution of the particulate product and passing through the bag, from the inside to the outside of the latter.
  • the bag is permeable to water. Penetration of the aqueous washing medium takes place both through the mouth of the bag and through it and the diffusion or release of the active solution of product also takes place through the mouth of the bag and through it .
  • the process of the invention can be applied not only to detergents in solid form, but also to any particulate product having activity during washing, for example chosen from bleaching agents, such as agents releasing chlorine or l active oxygen (peroxygen compounds), bleaching catalysts, bleaching activators, bactericides, foam regulators, brighteners, anti-deposition agents of dirt, enzymes, softeners, stain-removing agents grease or constituents which do not exert a direct action on the dirt but which can intervene in a washing process of the washing machine, for example the agents ensuring a protection of the organs and internal parts of the washing machine.
  • bleaching agents such as agents releasing chlorine or l active oxygen (peroxygen compounds)
  • the expression "particulate product” includes all the forms of presentation of such solid products, such as powders, granules, flakes, pellets and other similar physical structures capable of being dissolved in water under normal conditions of washing.
  • the process of the invention is particularly advantageous with detergents presented in the form of so-called high density particles, which are already developed. currently in some countries. They have advantages in packaging, transport, storage, vis-à-vis similar traditional products, because of the reduction in size they allow to obtain.
  • high-density particulate detergents tend to cause losses in the distribution tank as well as in the drainage circuits, even greater than detergents in traditional powder.
  • the ability to dissolve these new detergents is, in some cases, less than that of known products.
  • the device used according to the invention is distinguished in many aspects from certain means known from the prior art which consisted of sachets or bags which may contain a detergent or an additive useful in washing, such products may be present under particulate form in the sachet.
  • sachets or bags which may contain a detergent or an additive useful in washing, such products may be present under particulate form in the sachet.
  • US patent 3048993 of the applicant in which is described the use of a flexible permeable bag to contain an additive granular detergent, this flexible bag is not placed in the machine with the linen, but being initially secured by an operator to a wall of the machine drum, which requires special equipment thereof.
  • the bags or sachets of the prior art contain a predosed amount of product and cannot be reused. Their design does not allow the product to be released gradually, the product being completely dispensed either immediately at the start of the washing cycle, or during it.
  • the device of the invention does not have the drawbacks of sachets or bags of the prior art.
  • the device is of the reusable type and can dose at will the quantity of product (detergent or any additive) thanks to the presence of the mouthpiece, which is used to fill the product.
  • the sachets or bags of the prior art must have a wall which is soluble in water or in the washing medium or else, in the case where this wall does not 'is not soluble in water, it is necessary to provide seals, or bonds capable of dissolving to release the products.
  • this wall In the first case, that of water-soluble walls, there is no problem with the washing machine, but the sachets or bags are difficult to store and to market practically, because of their sensitivity to humidity. This solution is therefore not technically acceptable, except by adopting much more costly measures concerning the design of the wall.
  • the device of the invention can be recovered at the end of washing without any risk for the machine, which is entirely essential for the practical needs of users.
  • the method of the invention can be implemented with a wide variety of devices comprising a flexible bag.
  • the material of the flexible bag can be of any type, as long as it has sufficient resistance to water and to the washing medium at the temperatures used during washing as well as during drying, thus being able to go up to 'at about 150 ° C. he can therefore be a woven or non-woven material made from natural or synthetic fibers or a mixture thereof.
  • a bag formed from a flexible sheath made of pure cotton may be used either in the form of a fabric having a mesh opening of less than about 0.5 mm or in the form of a nonwoven article with openings ranging in particular from 0.5 to 0.8 mm.
  • the bag can also be produced from extruded or co-extruded films and having perforations.
  • the dimensions of these can vary within wide limits, depending on the nature and the particle size of the particulate product. As an indication, perforation films of approximately 380 microns can be used.
  • the material of the bag is not necessarily a textile material.
  • the sheath can also be made from a plastic mesh or a sheet of paper or other porous and water-resistant cellulosic material. If the material provided for the flexible bag does not in itself have sufficient resistance to water, it can be provided with a coating making it water resistant.
  • the coating may consist of a latex-based binder associated with a hydrophobic substance.
  • the external shape of the bag can also be very variable and according to an advantageous characteristic of the invention, it is possible to adapt this shape to the type of particulate product used as well as to the conditions under which this product must be released, as examples. will be given later.
  • the bag can be a substantially cylindrical sheath extending in the extension of the mouth, the diameter of the sheath then being substantially equal to that of the mouth.
  • sheaths which taper from the mouthpiece or, on the contrary, flare from it.
  • a tapered sheath provides relatively faster release of the particulate product, while a flared sheath provides relatively slower release.
  • the flexible bag can have various markings corresponding to filling levels and therefore to variable quantities. of particulate products.
  • the device according to the invention had at least one mouth allowing both the filling of the bag with the active product and its release in pre-dissolved form, in the washing medium and in the laundry in the machine.
  • the device has a single mouth, the section of which can be any: circular, oval, square, rectangular and the like. Good practical results have been obtained with mouthpieces of circular section.
  • a means serving as support for the sheath of the bag can be simply made using a ring having, as a section, that intended for the mouth.
  • This ring can be made of a material of completely variable hardness, the only condition being that the mouthpiece is kept open during washing.
  • the constituent material of the ring can be a plastic, metallic material or else wood, cardboard rendered water resistant and any other similar material. Good practical results are obtained with plastics which are easy to work in order to achieve the desired configurations of the ring.
  • polyethylene and polypropylene are very suitable.
  • the means intended to mask the mouthpiece must be adapted to the shape and nature of the ring defining it. Purely illustrative examples will be given later. Good practical results have been obtained with a ring having radial walls leading to a solid central zone, so that openings are thus produced between each of said radial walls.
  • the walls in question may be straight or on the contrary have a particular profile, for example in the form of a helix. But many other variants are possible: for example one can provide inside the ring delimiting the mouth, walls concentric with this ring, going towards the inside thereof, with radial walls disposed between said intermediate partitions and the outer ring.
  • the shape of the ring surrounding the flexible bag can be chosen so as to facilitate the removal of particulate product in a larger container, for example a barrel.
  • the ring can be arranged so that its outer edge acts as a sampling trough.
  • the ring can also have surface irregularities, in relief or in hollow, allowing a good grip with the fingers.
  • fix on the ring an element allowing its gripping.
  • Such an element can be permanently mounted, in which case it is preferably of small dimension, or as a variant, this element consists of a handle of larger dimension, which can be removably fixed by any suitable means on the body of the Ring.
  • the choice of a particular type of metering and diffusing device with flexible bag can be adapted to the active product to be used during washing.
  • devices whose mouthpiece remains completely open during washing and which do not include any masking means can be used to contain detergents or additives whose constituents dissolve in water only slowly.
  • An example of a detergent composition having such characteristics is as follows: Alkyl sulphates 7-10% Fatty acid 1- 3% Aluminum and sodium silicates 15-25% Water-soluble polymers 1- 3% Sodium silicate 3- 8% Sodium sulfate 10-40% Sodium carbonate 5-10% Alcalase (enzyme) 0-2%
  • Another example of a detergent composition which can be used for delicate washing and which can be used with a metering and diffusing device with an open mouth is as follows: Alkyl sulphates 10-20% Fatty acid 1- 3% Aluminum and sodium silicates 20-30% Sodium silicate 1- 5% Sodium sulfate 20-40% Sodium carbonate 0- 5%
  • Additives which can also be used in such a metering and diffusing device are, for example, products which exert a softening action on the washing water.
  • a metering and diffusing device comprising a mouthpiece with masking means can be used with detergents for heavy washes for which direct contact between the linen and some of its constituents should be avoided.
  • a detergent composition for heavy washes falling into this category the following may be cited: Alkyl sulphates 7-10% Fatty acid 1- 3% Aluminum and sodium silicates 15-25% Water-soluble polymers 1- 3% Sodium perborate 10-25% Sodium silicate 3- 8% Sodium sulfate 10-40% Sodium carbonate 5-10% Alcalase 0-2%
  • composition can comprise up to 5% of a bleach activator such as tetraacetyl-ethylene diamine or iso-nonanoyl oxybenzene sulfonate.
  • a bleach activator such as tetraacetyl-ethylene diamine or iso-nonanoyl oxybenzene sulfonate.
  • Certain particulate products can present some difficulties of dissolution in the aqueous medium, after having been introduced inside the flexible bag. Powder residue, wetted but not dissolved, has sometimes been observed remaining inside the bag at the end of the washing operation.
  • the present invention also relates to a general type process described above and ensuring complete dissolution of the particulate product during the washing cycle.
  • the invention also relates to devices whose structure is designed to preserve the longevity of the flexible sheath constituting the bag.
  • a device comprising means extending inside the bag, from the mouth thereof, said means ensuring at least partial maintenance of the general shape of the bag during washing.
  • a device for the implementation of this embodiment is therefore characterized by the presence of the aforementioned holding means, which are placed inside the sheath of the bag.
  • the general shape of the sheath of the bag was then kept substantially during the entire washing operation, the holding means preventing in particular the flexible walls of the sheath from approaching.
  • the integrity of the shape of the bag is substantially preserved, so that the particulate product dissolves completely and normally during washing, to be gradually released through the mouth of the bag as well as, if the material constituting the bag is permeable to water, through the sheath of the bag.
  • the holding means consist of a rod plunging inside the bag, one end of which is fixed at the mouth and the other end is free.
  • the length of such a rod is variable, the latter being able to extend at various levels inside the bag, from the mouth to the bottom of the latter.
  • the cross section of the rod is significantly less than the section of the bag, so that the sheath thereof can exercise its function without being hindered by the presence of the rod inside the bag.
  • the free end of the rod has a flared or open part towards the bottom of the bag.
  • This flared part may have the shape of a disc produced in one piece with the rod or made integral with the latter by any means. This flared part can be full or perforated, so, in the latter case, to more easily allow free access to the aqueous medium to the bottom of the bag.
  • the length of the rod is suitably such that the flared part is located near the bottom of the bag.
  • the holding means consist of a cage plunging inside the bag.
  • Said cage may comprise a first end part, cooperating with the mouthpiece in order to be fixed on the latter and a second end part, which is free and extends inside the bag.
  • This first end portion can be shaped as a rod to be fixed at the mouth of the bag, with the ring delimiting the latter or, if they exist, as is preferred, with the masking means from this mouth.
  • Said cage also comprises a number of members in the form of bars, which generally extend in the direction of the longitudinal axis of the bag. It is advantageous that these bars are held at each end by an annular member, or any other section, generally corresponding to that of the mouth and the sheath of the bag.
  • the holding means consist of an assembly whose longitudinal axis generally corresponds to that of the bag, said assembly comprising at one end a first member cooperating with the means delimiting the mouth of the bag or, if they exist, with the means for masking the latter, and at the other end a second member located inside the bag , said members serving as support for bars extending generally longitudinally inside the bag.
  • the volume of the flexible bag must be chosen according to the dose of active product to be dispensed during washing.
  • suitable volume values for the flexible bag are approximately 250 ml to 400 ml, which makes it possible to introduce therein weight quantities of particulate detergent of the order of 150 250 g per wash.
  • the method of the invention which uses a metering and diffusing device with flexible bag makes it possible to use detergent compositions which currently cannot find a practical application, due to the fact that they cannot be properly distributed from the tub or compartment fitted to the washing machine. This is already true for certain high density detergent compositions, which have already been mentioned previously. But the same observation is to be made for other detergent compositions having a poor solubility in water.
  • the method of the invention therefore makes it possible to use detergent compositions providing better washing performance, for example by reducing or even eliminating the fillers of sodium sulfate type while increasing the proportions of surfactant, for example anionic and nonionic.
  • the invention can be implemented with particulate products of very variable particle size, given that those skilled in the art have many parameters in the metering and diffusing device to choose the most appropriate device according to the nature of the active product. : material constituting the flexible bag as well as its shape, mouthpiece with or without masking means, shapes and dimensions of the mouthpiece and the openings which it comprises if there is presence of masking means, holding means inside the bag sheath, and the like.
  • the method of the invention makes it possible to distribute detergents, additives or other active washing products available in particulate form, even within the laundry in the machine, which provides higher concentrations of detergent solution in contact with the laundry and therefore increases the performance and quality of washing .
  • the invention virtually eliminates the losses of active product, in particular detergent, which occur when the metering compartment of the washing machine is used, the losses in the drain circuit of the machine also being eliminated.
  • the amount of plastic used in the metering and diffusing device is very low, since it is reduced to that of the ring delimiting the mouthpiece and carrying the flexible bag. In some cases, it is not even necessary to use plastic material to make such a ring. Thus, the invention provides better protection of the environment, since the materials constituting the device are very largely degraded in the natural environment.
  • the very small size of the dosing and diffusing device with flexible bag makes it possible to associate it in an optimal manner with the packaging of products in particles, such as detergents and other additives useful in washing. It is thus possible to use individual packages comprising larger quantities of particulate product and / or packages which themselves have a reduced bulk.
  • the device in question is very easy to handle and store, since it occupies only a very small space.
  • the invention makes it possible to use any desired quantity of product, depending on the nature of the latter. We therefore even choose the metering and diffusing device most appropriate to the characteristics of the product, a type of device then being assigned to an individual product packaging.
  • the method of the invention is still very easy to implement since the metering and diffusing device can be used directly to take off the particulate active product. Once the washing operation is complete, the device is easily retrieved from the machine and can then be reused. Even if the user forgets the device in the machine or in the dryer, this presents no disadvantage either for the machine or for the laundry in a subsequent washing operation.
  • Fig. 1 schematically represents, in front view, a metering and diffusing device usable in the method of the invention.
  • Fig. 2 is a view similar to FIG. 1 showing a variant.
  • FIG. 3 is a view similar to FIGS. 1 and 2 showing another variant.
  • Fig. 4 is a section illustrating the mounting of the flexible bag on a support ring.
  • Fig. 5 is a plan view of a ring delimiting the mouth of the bag.
  • Fig. 6 is a view similar to FIG. 5 illustrating variant.
  • Fig. 7 is a view similar to FIGS. 5 and 6, illustrating another variant.
  • Fig. 8 is a schematic plan view showing a ring with gripping means.
  • Fig. 9 is a view similar to FIG. 8, illustrating a variant.
  • Fig. 10 is a view similar to FIG. 8, illustrating another variant.
  • Fig. 11 is an exploded perspective view showing the various constituents of another embodiment of a device according to the invention, as well as the method of mounting said constituents.
  • Fig. 12 is a perspective view with partial cutaway of the device of Figure 11, as it can be used.
  • Fig. 13 is a view similar to FIG. 12, illustrating a variant.
  • Fig. 14 is a top view showing a detail of an organ of the device in FIG. 13.
  • Fig. 15 is an exploded perspective view of another embodiment of a device of the invention.
  • Fig. 16 is a detailed perspective view showing a variant of the holding means used in the device of FIG. 15.
  • Fig. 17 is an exploded perspective view of another embodiment of a device of the invention.
  • Fig. 18 is a perspective view of the device of FIG. 17, with partial cutaway, said device being mounted and ready for use.
  • the metering and diffusing device designated by the general reference 10 in FIG. 1 essentially comprises a ring 1 and a bag 2 made of flexible material, for example cotton fabric.
  • the size of the fabric openings 2 must be such that it can prevent the free passage of a product particulate, including a detergent, placed inside the bag, even for the finest particles.
  • the bag 2 has a generally approximately cylindrical shape but there are shown variants in Figures 2 and 3 which illustrate different shapes.
  • the device 20 comprises a ring 21 carrying a flexible bag 22 which tapers towards the tip.
  • the device 30 of FIG. 3 comprises a ring 31 and a flexible bag 32 which widens out from the mouth delimited by the ring 31.
  • the shape of the bags allows the retention characteristics of the particulate product to be varied. inside the bags and, consequently, the ability to diffuse into the washing medium and into the laundry the particulate product in pre-dissolved form.
  • the bag 22 of Figure 2 provides faster diffusion characteristics than the bag 32 of Figure 3, the structure of the ring 31 and the corresponding mouth being the same.
  • Figure 4 is a sectional view schematically showing the mounting of a flexible bag 42 on a support ring 41.
  • a flexible bag 42 In this example it is made of plastic, for example polypropylene. It is formed of an outer wall 43 connecting to an inner wall 44, the latter being substantially rectilinear. Between these two walls is provided a compartment 45 inside which can be inserted the extreme edge 46 of the bag 42.
  • any suitable means can be used, for example an adhesive capable of withstand the temperatures used in washing machines, including those where drying is carried out, the temperatures then being able to range up to 150 ° C.
  • Figure 5 shows schematically in plan the structure of a ring having given good practical results in the implementation of the method of the invention. It essentially comprises a peripheral wall 51 arranged in the same way as the ring 41 shown in Figure 4. In the center of the ring 51 is mounted a pad 52 from which extend a number (in the example chosen this number is equal to 6) of elements 53 in the form of turbine blades. Between the elements 53 are openings 57.
  • a ring of the type shown in FIG. 5 allows both the filling of an associated flexible bag, while preventing a massive release of particulate product through the openings 57.
  • FIG. 5 shows a ring comprising a peripheral wall 61, an internal stud 62 and rectilinear radial partitions 64, to form openings 67 between them.
  • a ring is seen having a wall peripheral 71, an intermediate wall 73 of concentric shape and an interior stud 72. Between the walls 71 and 73 are provided radial partitions 74 forming between them openings 77. Likewise between the walls 73 and the interior stud 72 are provided walls radial 75 forming openings 78 therebetween. Results equivalent to those of the device in FIG. 5 can be obtained using the devices in FIGS. 6 and 7, by appropriately choosing the number and the size of the openings thus produced.
  • FIGS. 4 to 23 have been given only by way of illustration for a person skilled in the art. The latter can also use structures which have been the subject of FIGS. 4 to 23 of the FR patent application already mentioned and introduced by reference in the present specification.
  • FIGS. 5 to 7 show rings which all have inside certain elements which act as masking means to prevent the particulate product from being released in solid form from the inside of the bag.
  • This type of ring is shown in Figures 8 and 9.
  • the ring of Figure 8 has a peripheral wall 81 provided with a tongue 82 which can serve as a gripping means.
  • the tongue 82 facilitates the introduction of the particulate product when it is taken out in a package for dosing in the bag.
  • FIG. 9 illustrates a variant in which the ring 91 can be provided with a handle 92, presented separately and which can be fixed in a removable manner at 93, by any suitable rapid fixing means, in particular by clipping or notching.
  • FIG. 10 shows another variant according to which the ring 101 comprises surface irregularities on its outer edge, intended to facilitate gripping with the fingers.
  • these irregularities are formed by a recess 102, for example to accommodate the thumb, and at least one other recess 103, to accommodate the index finger of the same hand. The user can thus, very simply, grasp the ring 101 in order to fill the bag associated with it.
  • FIGS. 4 to 10 The metering and diffusing devices used in the process of the invention have been illustrated in FIGS. 4 to 10 with rings delimiting a circular mouth.
  • this shape is not compulsory and that one can also use oval or other contours. Devices which do not have a sharp edge are preferred for washing purposes, so as to cause no damage to the laundry. This is why in general it prefers round or oval structures rather than structures with square or rectangular sections, even if the edges are rounded.
  • the skilled person can adopt any shape or structure, especially if the ring is made of plastic, because its manufacture is easy by known molding techniques, for example by injection. But, as already indicated above, it is not imperative that the ring is made of plastic, other materials may also be suitable.
  • Figures 11 to 18 illustrate embodiments of the device of the invention with holding means arranged inside the sheath of the bag.
  • the device shown in perspective and in exploded view in Figure 11 comprises, in accordance with the teaching of the main patent, a part 201 having the general shape of a ring, which delimits the mouth of the device.
  • This in the example shown, comprises masking means 202, which are constituted by a number of sails in the form of propellers, which start from a hollow central axis 203 to end at the periphery of the ring 201
  • This type of device is easy to obtain by molding plastic material, for example polyethylene or polyproplyene.
  • the central part 203 is hollow, which lightens the device and also makes it possible to produce the assembly according to the invention, as will be described later.
  • the device comprises a bag 204, for example in the form of a nonwoven, permeable to an aqueous medium.
  • This bag has an end 204 a and a bottom 204 b .
  • the end 204 a is wound and fixed on a ring 205, which can be fixed by form conjugation in the ring 201; this fixing can be done by simple pressing in or by any other means, for example by screwing or by rapid fixing of the bead-throat type (clipping). All of these mounting methods are familiar to those skilled in the art and are easy to use with plastic components.
  • the device of FIG. 11 also comprises means which, in the example shown, consist of a rod 206 ending in a widened or flared part 207. At its end 208, the rod 206 is pressed into the central part 203 of the ring 201.
  • Figure 12 shows the device of Figure 11, once it has been mounted.
  • the holding means in the form of the rod 206, extend from the center 203 of a ring 201 to a depth inside the bag 204 near the bottom 204 b thereof.
  • the part 207 is full and the rod 206 extends practically over the entire length of the bag.
  • the length of the rod 206 can be variable.
  • the rod 206 does not go to the bottom of the bag 204.
  • the section of the open part 207 can be d variable importance.
  • FIGS. 11 and 12 show a solid part 207, but, as shown seen from above in FIG. 14, the holding means can consist of a rod 206 comprising at its end plunging inside the bag, an openwork disc 209; in this example we see that the disc 209 has three holes 209 b , held by a ring 209 a .
  • a rod of the type shown in Figure 14 can also be used in a device according to Figures 11 and 12.
  • the desired quantity of particulate product having a function during washing, more particularly a detergent.
  • Any of the particulate products already described above can be used. Tests have been carried out with detergent compositions, examples of which will be given below.
  • the volume of the bag 204 must correspond to the quantity of detergent useful for washing, for example the bag is designed to contain an amount of the order of 250 g of powder. With a device of the kind shown in Figures 11 to 14, the amount of undissolved powder at the end of washing is greatly reduced compared to a device having no means of holding the bag inside thereof.
  • the tests carried out have shown that devices of the type described in FIG. 12 (rod going to the bottom of the bag) give rather better results than those in which the rod does not go to the bottom of the bag.
  • FIGS 15 and 16 illustrate another embodiment in which the holding means are established in the form of a cage.
  • Figure 15 shows in exploded view the various components of the device.
  • the ring 211 provided with its masking means 212 in the form of a helix, with its central opening 213.
  • the bag 214 is fixed at its end 214 a to a ring 215. The latter cooperates by conjugation of shapes with the ring 211.
  • the holding means designated by the general reference 220 have a first end in the form of a cylindrical rod 216 ending in a part 218 capable of being introduced into the central opening 213 of the ring 211.
  • the cage 220 ends in an openwork collar 219 and, as shown in the drawing in FIG. 15, we see members 217 or bars, extending in the direction longitudinal inside the bag 214 and in the axis thereof.
  • these bars 217 are four in number.
  • the height of the cage 220 can be variable, so that the collar 219 can end near the bottom 214 b of the bag 214 or else stop at an intermediate distance from the inside the bag 214.
  • the end 219 is shown in the form of an openwork collar, but it is also possible to use a full disc.
  • the bars 217 comprise a part 217 b substantially parallel to the axis of the bag 214 and another part 217 has oriented obliquely to connect to the rod 216.
  • Many other alternative embodiments are possible while adopting a general form of cage. By way of example, a variant has been shown in FIG. 16.
  • the latter illustrates holding means in the form of a cage designated by the general reference 220.
  • a tubular part 216 of small dimensions , intended to be introduced into the central opening 213 of the ring 211.
  • the cage 220 ends in a flange 219.
  • the bars 217 which have longitudinal parts 217 b of other parts 217 a connecting to the tubular part 216.
  • FIGS 17 and 18 illustrate another embodiment which has been found to provide particularly interesting results for washing laundry in the machine.
  • the exploded view of Figure 17 shows the various components of the device.
  • This first comprises a ring 221 comprising masking means 222 in the form of a helix extending around a hollow central axis 223.
  • the bag 224 has a bottom 224 b and is fixed to its other end 224 a on a ring 225 which can cooperate by conjugation of shapes with the ring 221.
  • the holding means consist of an assembly designated by the general reference 230.
  • the latter comprises two members 226, 229 of generally annular shape.
  • the ring 226 has a flange 229 capable of bearing on the ring 225 delimiting the mouth of the bag, so that during assembly, the ring 221 comes to cover the flange 228 and the ring 225.
  • the assembly 230 is integral with both the ring 225 carrying the bag 224 and the ring 221, which is fixed by any suitable means: screwing, simple insertion or rapid fixing by clipping (of the bead and groove type).
  • annular members 226 and 229 extend a number of bars 227 giving the assembly 230 a generally frustoconical shape, the section of the member 226 being greater than that of the member 229.
  • the realization of the assembly 230 is within the reach of those skilled in the art, by using conventional means of plastic molding.
  • FIG 18 There is shown in Figure 18 the device of Figure 17 once mounted, that is to say in use.
  • the partial tearing practiced in the bag 224 allows to see inside of it the arrangement of the assembly 230, which is used to maintain the general shape from the bag.
  • the longitudinal dimension of the assembly 230 is such that the ring member 229 arrives at a small distance from the bottom 224 b of the bag 224.
  • This arrangement gave the best practical results and it was found that no residue of particulate product, such as a detergent, remained at the end of a washing operation.
  • Possible variants can however be implemented with different dimensions of the assembly 230, the latter then extending at variable levels inside the bag 224. It has also been found that a structure of the holding means like that of the assembly 230 gave it excellent mechanical strength.
  • a metering and diffusing device comprising a flexible bag with a capacity of 250 ml to 400 ml, having the approximate shape shown in FIG. 2. Its mouth was delimited by a polypropylene ring as illustrated above with reference to FIG. 5.
  • the washing of the laundry was carried out with doses of detergent varying between 150 and 250 g.
  • the bag was made with a cotton fabric, the mesh openings of which were less than about 0.5 mm in size.
  • Other tests were carried out with a non-woven cotton bag, having openings in the range of about 0.5 to 0.8 mm and equivalent results were obtained.
  • a detergent composition for heavy washing was used as defined below:
  • the above composition was added with an amount of up to 5% of a bleach activator, namely tetraacetylethylenediamine. In all cases, excellent results in washing performance have been obtained.
  • a bleach activator namely tetraacetylethylenediamine.
  • Comparative tests have been undertaken to assess the rate of dissolution of the same granular detergent composition for heavy washing of the type just described, under conditions similar to those of washing the machine.
  • a metering device was used according to the present invention comprising a ring as shown in Figure 5, and a bag made of a coextruded polypropylene film with openings of about 380 microns.
  • a metering device comprising an identical ring but extended by a solid polyethylene body was subjected to the same tests. In both cases the capacity of the device corresponded to approximately 200 g.
  • the results obtained showed that the dissolution rate of the composition was faster with the device according to the invention, as evidenced by the measurements made on the amount of detergent released in the bath, especially during a period of 8 to 10 minutes. after placing the device in the machine. This is particularly favorable for washing laundry.
  • the washing results were evaluated by experts, who thus carried out 288 visual evaluations (ie 12 per test) based in particular on the characteristic samples.
  • the preference rate (61%) expressed in favor of the flexible bag device of the invention was significantly higher than that (39%) concerning the rigid device.
  • the particulate product used was a detergent powder having the following approximate composition: Linear alkylbenzene sulfonate 5.64 Alkyl (tallow) sulfate 2.42 Non-ionic 5.76 Sodium tripolyphosphate 24.00 Zeolite A 5.39 Polymers 3.60 Sodium perborate 13.50 Tetraaminoethylenediamine 5.28 Enzyme 1.62 Buffer 21.18 Chelating 1.08 Miscellaneous and humidity complement to 100
  • composition in which the parts are expressed by weight, corresponds to a detergent containing, as an adjuvant, a phosphate-based constituent, namely sodium tripolyphosphate.
  • phosphate-free compositions such as that indicated below: Linear alkylbenzene sulfonate 6.63 Alkyl (tallow) sulfate 2.43 Non-ionic 6.11 Zeolite A 22 Polymers 5.60 Sodium perborate 16 Tetraaminoethylenediamine 5.76 Enzyme 1.62 Buffer 20 Chelating 0.80 Miscellaneous and humidity complement to 100
  • the amount of product used was 260 g in each case.
  • the washing tests were carried out by placing in the drum of the machine white and colored towels and for the purposes of the demonstration, the device was placed in the middle of the towels to be washed, these being folded over to cover the device as well put in place.
  • the washing machine was then started (program 7 - 40 ° C) and the complete washing cycle was allowed to end.
  • the device was then retrieved, taking care to grasp it by its mouth ring, to carefully observe any residues of undissolved powder that could have remained inside the bag, in particular at the bottom of it.
  • devices have also been used which have no means of holding inside the bag.
  • the devices with holding means were found to be superior, in that the quantities of undissolved powder residue were either completely absent, or, in any case, significantly lower than those of the device not comprising the means holding.
  • the best results have been recorded. Also, it has been found that even after numerous washes (10 to 20 washes), the device could be reused without wearing the bag.
  • the present invention has been illustrated with devices comprising a mouth with masking means. It is quite certain that the same provisions could also be adopted with devices without masking means, that is to say with a mouth completely free from the bag. Similarly, the practical tests were carried out with bags whose constituent material was permeable to the aqueous medium. It goes without saying that the invention is also applicable to devices whose bag is impermeable to the aqueous washing medium.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Textile Engineering (AREA)
  • Detergent Compositions (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
  • Processing Of Solid Wastes (AREA)
  • Cleaning By Liquid Or Steam (AREA)
EP89401366A 1988-05-18 1989-05-17 Procédé et dispositif pour le lavage du linge en machine avec un produit particulaire Expired - Lifetime EP0343070B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR8806660 1988-05-18
FR8806660A FR2631640B1 (fr) 1988-05-18 1988-05-18 Procede et dispositif pour le lavage du linge en machine avec un produit particulaire
FR8900288 1989-01-11
FR898900288A FR2641551B2 (fr) 1988-05-18 1989-01-11 Procede et dispositif pour le lavage du linge en machine avec un produit particulaire

Publications (2)

Publication Number Publication Date
EP0343070A1 EP0343070A1 (fr) 1989-11-23
EP0343070B1 true EP0343070B1 (fr) 1996-11-13

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EP89401366A Expired - Lifetime EP0343070B1 (fr) 1988-05-18 1989-05-17 Procédé et dispositif pour le lavage du linge en machine avec un produit particulaire

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US (1) US4969927A (fi)
EP (1) EP0343070B1 (fi)
AT (1) ATE145260T1 (fi)
DE (1) DE68927448T2 (fi)
DK (1) DK168796B1 (fi)
EG (1) EG19297A (fi)
ES (1) ES2093615T3 (fi)
FI (1) FI87663C (fi)
FR (1) FR2641551B2 (fi)
GR (1) GR3021782T3 (fi)
MA (1) MA21550A1 (fi)
PT (1) PT90565B (fi)
TR (1) TR24072A (fi)

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Also Published As

Publication number Publication date
FI87663C (fi) 1993-02-10
EG19297A (fr) 1994-09-29
GR3021782T3 (en) 1997-02-28
FI892391A (fi) 1989-11-19
DK168796B1 (da) 1994-06-13
MA21550A1 (fr) 1989-12-31
DE68927448D1 (de) 1996-12-19
FR2641551B2 (fr) 1991-11-22
US4969927A (en) 1990-11-13
TR24072A (tr) 1991-03-01
FR2641551A2 (fr) 1990-07-13
FI892391A0 (fi) 1989-05-18
FI87663B (fi) 1992-10-30
ATE145260T1 (de) 1996-11-15
PT90565A (pt) 1989-11-30
ES2093615T3 (es) 1997-01-01
DE68927448T2 (de) 1997-04-24
DK236989D0 (da) 1989-05-16
DK236989A (da) 1989-11-19
PT90565B (pt) 1994-04-29
EP0343070A1 (fr) 1989-11-23

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