Absorbent magnetic cleaning device

Abstract

The present invention relates to an absorbent magnetic cleaning device (1100) comprising an upper surface (120) and a lower surface (160) joined to each other to form a closed three-dimensional pad, the junction of the upper surface (120) and the lower surface (160) being made at a transverse mid-plane (140) of the closed three-dimensional pad, the device further comprising a ferromagnetic element (210, 212, 214, 216; 310; 410, 412, 414, 416) and a deformable central core (180; 185) integrated within the closed three-dimensional pad.

Description

Title of the invention: Magnetic absorbent cleaning device Technical field

[0001] The present description relates to the field of cleaning and maintenance devices, in particular to cleaning devices used for household tasks, as well as to methods of manufacturing such devices.

[0002] Background of the invention:

[0003] Cleaning devices such as cloths, fabrics, mops, brooms, brushes or sponges incorporating magnetic elements in order to make them easier to store and use, in particular after cleaning with water or a cleaning liquid.

[0004] For example, US Patent Application No. US 20220257081 A1 relates to a textile device in the form of a sponge with magnetic properties. This sponge comprises several layers, including an abrasive part and a magnet intended to attach to a metal wall by magnetic attraction. This allows the sponge to be raised in a suspended position to dry it after use.

[0005] However, this sponge and the known water cleaning devices have various disadvantages.

[0006] First of all, the presence of these magnetic elements at an external area of ​​these absorbent cleaning devices, to attach them to a surface after use, implies a loss of cleaning efficiency since this external area cannot be used for cleaning. This external area in fact has an irregularity, for example a hollow, a roughness or a protruding part, on an edge of the device, which cannot be used for cleaning. In addition, for cleaning devices using water or a cleaning liquid, drying is necessary after use. But depending on the configuration, shape and composition of the cleaning device, certain parts of it are often not sufficiently exposed to the air when it is placed in the drying position, for example when it is attached to a steel or iron surface.This results in uneven drying of the cleaning device, as at least one side is always in contact with this surface, which encourages the growth of mold or bacteria. This is particularly problematic when used frequently without sufficient drying between uses. Secondly, the addition of magnetic materials to external areas of cleaning devices makes them heavy and uncomfortable to handle by hand. The manufacture of such devices is also often complicated, uneconomical and environmentally unfriendly due to the materials used.

[0007] In this context, there is a significant need to be able to have solutions allowing optimal drying of magnetic cleaning devices, thus reducing the proliferation of odor-causing bacteria and extending their lifespan. In addition, there is a significant need to be able to find an ideal compromise in an optimal system allowing magnetic attraction / repulsion between the magnetic materials of such cleaning devices and those of a holding or supporting surface, in order to guarantee secure adhesion of the device to the holding or supporting surface, without premature damage to the sponge or the materials to be cleaned. Also, there is also a significant need to be able to manufacture these magnetic cleaning devices more quickly, more precisely and more economically.The complexity of manufacturing known magnetic cleaning devices typically lies in the optimal choice of dimensions and composition of the magnetic materials to be integrated on or in these devices, as well as in their compatibility with a humid environment conducive to oxidation. Description of the invention

[0008] In order to address this or these drawbacks, there is proposed according to a first object of the present invention an absorbent magnetic cleaning device comprising an upper surface and a lower surface joined to each other to form a closed three-dimensional pad, the junction of the upper surface and the lower surface being made at a transverse mid-plane of the closed three-dimensional pad, the device further comprising a ferromagnetic element and a deformable central core integrated inside the closed three-dimensional pad.

[0009] This aims to provide an absorbent magnetic cleaning device, for example a magnetic sponge, the configuration of which allows for faster drying and therefore a reduction in the proliferation of bacteria. In addition to simpler and more economical manufacturing, this also aims to increase the maximum lifespan of the sponge, since it remains clean for longer and requires fewer regular washes.

[0010] In the present invention, the closed three-dimensional block can take different dimensions and geometric shapes. For example and according to different possible embodiments, the shape of a closed three-dimensional block can be chosen from a cuboid, a cube, a rectangular parallelepiped, a triangular prism, a hexagonal prism, a regular octahedron or even a regular icosahedron.

[0011] In one embodiment, the upper surface and / or the lower surface comprises a material selected from a microfiber material and an abrasive material.

[0012] This makes it possible to combine the advantages of a microfiber material or an abrasive material with the magnetic properties of the cleaning device. Thus, the upper and / or lower surface of the device can be used for specific functions such as the delicate cleaning of sensitive surfaces with a soft microfiber material, or the more effective removal of stubborn dirt with an abrasive material. This provides increased versatility, with better adaptation to different types of surfaces and dirt levels, while retaining the benefits of magnetic attraction for practical and efficient use.

[0013] In one embodiment, the microfiber material is chosen from a terry-like knit composed of polyamide and / or polyester.

[0014] Examples of microfiber include ultra-absorbent polyester microfiber, with the advantage of being able to dry surfaces quickly by absorbing moisture more effectively than traditional sponges. Another example is antibacterial microfiber, which helps prevent the growth of bacteria on the surface of the device, thus ensuring optimal hygiene during its use. Yet another example is microfiber with electrostatic properties, which makes it easy to capture dust, fine particles and allergens present on surfaces cleaned with the device, leaving a clean and healthy finish. Yet another example is microfiber with exfoliating action, with the advantage of gently removing dead skin cells and impurities when using the device in case of cosmetic use.Yet another example is microfiber with a polishing action, giving a better shine to reflective surfaces by removing streaks, stains and marks with increased efficiency, leaving a better shine.

[0015] In one embodiment, the abrasive material comprises a double bonded polyester fabric formed of foam yarns and / or laminated yarns.

[0016] This provides an optimal scraping surface for household applications.

[0017] Preferably, the double-bonded polyester fabric is a double-bonded 100% polyester fabric. In particular, the combination of foam yarns and 100% polyester lamé yarns provides an abrasive material that forms an extremely effective scraping surface for removing stubborn residue and embedded dirt. The foam yarns provide a delicate texture that avoids scratching sensitive surfaces, while the lamé yarns provide a robust scraping action to dislodge hard-to-remove particles. Surprisingly, this combination creates a versatile sponge capable of thoroughly cleaning a variety of surfaces, while preserving their integrity and aesthetic appearance.

[0018] Other examples of abrasive materials, herein also considered "scraping surfaces", include stainless steel fiber materials, for easily removing burnt-on food residue or stubborn deposits, providing a robust and corrosion-resistant scraping action. Another type of abrasive material is a synthetic diamond composite material, even better removing the toughest dirt without scratching the surfaces. Carbonized bamboo provides another Natural and environmentally friendly scraping surface, offering an optimal compromise between effectiveness and gentle action on sensitive surfaces. Yet another example is a reinforced fiberglass material, which provides a rigid and resistant scraping surface, ideal for removing stubborn stains or ingrained residue on resistant surfaces. A textured silicone material can also offer a flexible and soft scraping surface, ideal for cleaning delicate surfaces such as non-stick cookware or fragile glassware. Abrasive nylon threads provide an abrasive material that is also resistant to wear, capable of removing stubborn residue while maintaining a consistent and long-lasting scraping action.

[0019] In one embodiment, the deformable central core is formed from a material chosen from an expanded polyurethane foam and a shape memory element.

[0020] Preferably, the expanded polyurethane foam is a 100% expanded polyurethane foam. This provides an extremely effective device for use as a sponge, with excellent results for absorption capacity, water retention, resistance to wear and deformation, as well as comfort of use.

[0021] A shape memory element also makes it possible to increase the performance of the device during cleaning or personal care. This makes it possible to provide a cleaning device with surprising advantages in terms of comfort because it adapts perfectly to the shape of the user's hand, making it more comfortable for prolonged manual use.

[0022] According to various examples, the deformable central core is formed from a shape memory element made of an elastomer, to allow the device to quickly return to its original shape after being compressed or deformed, thus ensuring increased durability and a long life for repeated use. A shape memory polymer may also be used, helping the device to better conform to the contours of the surfaces to be cleaned, thus providing better grip and a more effective cleaning action, even on complex shapes or irregular surfaces. Yet another example is a heat-reactive shape memory material, which allows the device to change texture or firmness in response to the heat of contact with hot water, possibly providing a massaging sensation or exfoliating action as the temperature increases.

[0023] In one embodiment, the ferromagnetic element is chosen from a ferromagnetic pellet, a permanent magnet and a ferromagnetic textile fabric.

[0024] In the present and / or according to embodiments, a permanent magnet is considered to be a ferromagnetic block, this block being for example made of a martensitic stainless steel, also called ferromagnetic stainless steel, of an iron such as neodymium iron (NdFeB), samarium-cobalt iron (SmCo), iron-aluminum-cobalt (Fe-Al-Co) or more simply iron(Cobalt (Fe-Co), depending on the properties ma desired genetics. A ferromagnetic pellet is a ferromagnetic block of parallelepiped shape but of negligible height compared to the dimensions of the device.

[0025] In light of the present invention, it is mentioned that traditional textiles generally do not possess ferromagnetic properties. However, the present invention understands the term ferromagnetic textile fabric to mean any composite material combining textiles with ferromagnetic elements to create ferromagnetic fabrics. A ferromagnetic textile fabric is thus, for example, a fabric or a knit that integrates ferromagnetic particles into its structure, generally by incorporating them into the yarns or by applying them to the fabric. These ferromagnetic particles can be metals such as iron, cobalt or nickel. In a knit, ferromagnetic yarns can be mixed with other types of yarns to create a hybrid knit.

[0026] In an advantageous embodiment, the manufacturing process of the device for incorporating a ferromagnetic textile fabric as a ferromagnetic element, and in particular the manufacturing itself of the ferromagnetic textile fabric, is of a complexity which has been surprisingly overcome by the inventors. The properties of the manufacturing process must thus be adjusted according to the raw material composing the thread(s) of the fabric, for example the choice of a material with a ferromagnetic property in the form of fibers, fiber nets or filaments, the choice of the thread section used to manufacture the fabric, the choice of the textile structure (knitted, woven, non-woven, etc.) itself, as well as the density of the textile structure.

[0027] The adaptation of these properties according to the shape, size and magnetic properties desired to obtain the final absorbent magnetic cleaning device is to be adjusted on a case-by-case basis to manufacture an innovative material compatible with use as a sponge, i.e. which meets the required conditions of flexibility, ferromagnetic properties and water resistance.

[0028] In an advantageous embodiment, the ferromagnetic pellet, the ferromagnetic element or a ferromagnetic washer is made of a steel, this steel being chosen from a carbon steel, a martensitic stainless steel, a ferritic stainless steel, an electrical silicon steel and a magnetic austenitic stainless steel.

[0029] Austenitic stainless steels are generally non-magnetic due to their austenitic crystal structure. However, some austenitic stainless steel compositions may exhibit slight magnetization when subjected to deformation or heat treatment.

[0030] These ferromagnetic elements can also be made from one or more magnetic stainless steel alloys, for example stainless steel of category "430", which is a magnetic ferritic alloy with the advantage of being magnetic by default. This type of steel is a type of ferritic stainless steel, a type which includes steels called "AISI 430", "AISI 434" or "AISI 444".

[0031] In one embodiment, the ferromagnetic element and the deformable central core are formed from a single piece.

[0032] Herein, the single-piece formation of the ferromagnetic element and the deformable central core defines them as being a single element, called a core, made of a single piece.

[0033] This makes it possible to provide a simpler, more compact and more homogeneous device than if the ferromagnetic element is separated from the deformable central core, which also results in a better balance of the device when used by hand or dry.

[0034] In a particularly advantageous embodiment, the core is manufactured directly by doping it with ferromagnetic particles, for example ions.

[0035] For example, it may be envisaged to form the magnetic element or the core with complexes of silver and an iron, to obtain surprising antibacterial properties. In a first example, a ferric silver complex, also called silver ferrocyanide (AgFe(CN)6), is studied for its antibacterial properties in combination with the stability and ease of use of iron. In a second example, silver complexes can be formed with cobalt. The cobaltic silver complex, or silver cobaltate (AgCoO2), is a ferromagnetic material doubly advantageous in terms of antimicrobial potential due to the presence of silver, and optimal magnetic properties due to the presence of cobalt.

[0036] According to one embodiment, when the deformable central core is formed of an expanded polyurethane foam, in particular, the latter can be doped with ferromagnetic particles, making it possible to create a flexible material with shape memory. It is important in this case to dose the ferromagnetic particles appropriately to create a magnetizable core, without negatively impacting the characteristics of the doped material.

[0037] In one embodiment, the ferromagnetic element comprises at least one ferromagnetic pellet or one permanent magnet, the at least one ferromagnetic pellet or the at least one permanent magnet being positioned inside the closed three-dimensional pad, at the transverse mid-plane and outside the deformable central core, close to an edge of the closed three-dimensional pad.

[0038] As used herein, "nearby" may be defined as a distance at least two times smaller than the order of magnitude of the dimensions of the cleaning device, and for example 1, 2 or 3 centimeters. In one example, the ferromagnetic element may consist of a single ferromagnetic pellet. Its approximate position may be indicated on an outer edge of the device by a visual marker, such as a colored element. In another example, the ferromagnetic element may consist of four permanent magnets, distributed near a respective edge of the closed three-dimensional pad.

[0039] As used herein, "nearby" means "separated by a few millimeters or centimeters", for example a distance between 1 millimeter and 10 centimeters, for example 5 millimeters, 1 centimeter, 2 centimeters, 3 centimeters, 4 centimeters or 5 centimeters.

[0040] This allows a magnetic cleaning device where at least one ferromagnetic element is available to provide a point of magnetic attraction or repulsion located along at least one edge of the device, for example along a single edge, along two edges, along three edges or along four edges. The device can thus be hung or arranged in a drying position along this or these edges, thereby increasing the surface area exposed to the air during drying.

[0041] In one embodiment, the ferromagnetic element comprises at least one ferromagnetic pellet or one permanent magnet, the at least one ferromagnetic pellet or the at least one permanent magnet being positioned inside the closed three-dimensional pad, at the transverse mid-plane and outside the deformable central core, close to two edges of the closed three-dimensional pad.

[0042] This allows a magnetic cleaning device where at least one ferromagnetic element is available to provide a point of magnetic attraction or repulsion located at an interior angle of the device, for example at a corner identifiable or not by a visual marker, at two corners, at three corners, at four corners or at more than four corners if the cleaning device comprises more than four sides, for example six corners if the cleaning device is generally hexagonal in shape. The device can thus be hung or arranged in a drying position from one of these interior angles or corners, thus further increasing the surface area exposed to the air during drying.

[0043] In one embodiment, the ferromagnetic element comprises a ferromagnetic pellet or a permanent magnet, the ferromagnetic pellet or the permanent magnet being positioned inside the closed three-dimensional pad, at the transverse mid-plane and inside the deformable central core.

[0044] This allows for a magnetic cleaning device where at least one ferromagnetic element is available to provide a point of magnetic attraction or repulsion located at a midpoint of an external surface of the device, increasing the stability of the device during drying.

[0045] In one embodiment, the ferromagnetic element comprises at least one ferromagnetic pellet or a permanent magnet, the at least one ferromagnetic pellet or the at least one permanent magnet. at least one permanent magnet being positioned inside the closed three-dimensional pad, at the transverse mid-plane and inside the deformable central core, near an edge of the deformable central core.

[0046] This provides a magnetic cleaning device where at least one ferromagnetic element is located within the device rather than on or near an external surface. This therefore provides better durability, improved adhesion, protection against scratches, greater versatility of use and facilitates maintenance. It is therefore a practical and effective option for cleaning tasks requiring magnetic action since by placing the ferromagnetic element within the closed three-dimensional pad, it is prevented from detaching or being damaged prematurely, the risk of scratching delicate objects when cleaning with the device is avoided, and drying of the device is more efficient since after use, it is sufficient to rinse the device and allow it to dry, preventing the ferromagnetic element from retaining moisture, thereby avoiding causing corrosion.

[0047] There is provided according to a second object hereof a method of manufacturing the absorbent magnetic cleaning device according to any one of the embodiments previously described, comprising the following steps: a) providing the deformable central core and the ferromagnetic element, b) forming a closed three-dimensional pad around the provided deformable central core by joining the upper surface and the lower surface to each other at a transverse mid-plane of the closed three-dimensional pad, and inserting the ferromagnetic element into the closed three-dimensional pad.

[0048] In accordance with the previously described embodiments of the device, and in one embodiment, the step of providing the deformable central core and the ferromagnetic element may be a step of providing a core, i.e. the ferromagnetic element and the deformable central core in a single piece. In such a case, the step of inserting the ferromagnetic element into the closed three-dimensional block is optional or omitted since the core is already present inside.

[0049] In accordance with the embodiments of the device previously described, and in possible embodiments of the manufacturing method, the steps of forming the closed three-dimensional pad around the provided deformable central core by joining the upper surface and the lower surface to each other at the transverse mid-plane of the closed three-dimensional pad, and of inserting the ferromagnetic element into the closed three-dimensional pad comprise: - a positioning of the ferromagnetic element inside the closed three-dimensional block, at the level of the transverse mid-plane and outside the deformable central core, close to an edge of the closed three-dimensional block, - when the ferromagnetic element comprises at least one ferromagnetic pellet or one permanent magnet, positioning of the at least one ferromagnetic pellet or of the at least one permanent magnet inside the closed three-dimensional block, at the level of the transverse middle plane and outside the deformable central core, close to two edges of the closed three-dimensional block, - when the ferromagnetic element comprises a ferromagnetic pellet or a permanent magnet, a positioning of the ferromagnetic pellet or the permanent magnet inside the closed three-dimensional block, at the level of the transverse mid-plane and inside the deformable central core, and / or - when the ferromagnetic element comprises at least one ferromagnetic pellet or one permanent magnet, positioning of the at least one ferromagnetic pellet or of the at least one permanent magnet inside the closed three-dimensional block, at the level of the transverse middle plane and inside the deformable central core, close to an edge of the deformable central core.

[0050] In one embodiment, when the deformable central core is formed from a material selected from an expanded polyurethane foam and a shape memory element, the manufacturing method further comprises a step d) of inflating the expanded polyurethane foam or enlarging the shape memory element inside the closed three-dimensional block.

[0051] This allows the deformable central core, or heart as the case may be, to expand and occupy a larger or even total space inside the cleaning device.

[0052] In one embodiment, the step of forming a closed three-dimensional pad around the provided deformable central core joining the upper surface and the lower surface to each other at a transverse mid-plane of the closed three-dimensional pad is preceded by the step of providing or inserting the ferromagnetic element into the device, such that the ferromagnetic element is present in the three-dimensional pad before the latter is closed.

[0053] In one embodiment, the step of inserting the ferromagnetic element into the closed three-dimensional block is preceded by a step cO) of incising the upper surface, the lower surface and / or the deformable central core, the incision being adapted to then insert the ferromagnetic element into the closed three-dimensional block.

[0054] In the present, several incisions are of course possible.

[0055] According to a possible embodiment, these steps are applicable on an industrial scale, for example by means of an automated manufacturing line implementing the previously described embodiments, this makes it possible to integrate the components in a repeatable and precise manner into the material of the cleaning device, for example before the expansion or swelling of the deformable central core, when formed from a material chosen from an expanded polyurethane foam or a shape memory element.

[0056] According to a possible embodiment, the step of inserting the ferromagnetic element into the closed three-dimensional block is followed by a step of closing or suturing the incision made, in order to provide a finished product without roughness and uniform on all its edges and sides.

[0057] According to a possible variant, encapsulation by suture replaces or complements the incision step. For example, the ferromagnetic element is encapsulated in a piece of thin, strong fabric, such as nylon or silicone. The area where the ferromagnetic element is integrated may be previously cut to create a small opening. The encapsulated ferromagnetic element is inserted into the opening, which is then closed using stitches made with thread. The stitches firmly fix the piece of fabric and the ferromagnetic element inside the device, thus ensuring their stability and integration. This avoids having to modify the structure of the device itself after the first manufacturing steps.The stitches may also be made in a manner that minimizes any risk of leakage or penetration of liquid through the device during its manufacture, for example by using a suture thread that is resistant to moisture and chemicals present in the environment where the device is manufactured or used.

[0058] According to a possible variant, insertion by drilling replaces or supplements the incision step. For example, a suitable tool such as a drill or a heated needle is used to drill a hole in the device.

[0059] According to a possible variant, insertion by cutting and closing replaces or supplements the incision step. For example, a slot can be cut by a knife or blade of suitable shape. Once the slot is created, the ferromagnetic element can be inserted into the slot so as to be completely enveloped by fibers of the materials of the upper surface and / or the lower surface. Then, the slot can be closed using a suitable adhesive or by folding the edges of the cut to firmly hold the ferromagnetic element in place.

[0060] In one embodiment, the step of providing the deformable central core and the ferromagnetic element comprises a step a0) of forming the deformable central core and the ferromagnetic element in one piece, the piece being called the core, and a step a1) of doping the core with ferromagnetic particles.

[0061] For example, ferromagnetic particles can be added when doping a polyurethane foam using a dispersion or infusion method. This allows these particles to be integrated into the matrix of the material, ensuring a homogeneous distribution of the magnetic properties. In terms of manufacturing, this also allows a More precise control over the manipulation of ferromagnetic particles during device manufacturing using external magnetic fields. This manipulation allows for control over the orientation and distribution of particles, opening the way to creating specific structures, patterns, and configurations in the final cleaning device material. This results in increased flexibility in the design and performance of the final product, tailoring the mechanical and magnetic properties as needed. Brief description of the figures

[0062] Other characteristics, details and advantages will appear on reading the detailed description below, and on analyzing the attached drawings, in which:

[0063] [Fig.l] illustrates a perspective view of an absorbent magnetic cleaning device according to a first embodiment of the invention.

[0064] [Fig.2] illustrates a sectional view of an absorbent magnetic cleaning device according to a first embodiment of the invention.

[0065] [Fig.3] illustrates a perspective view of an absorbent magnetic cleaning device according to a second embodiment of the invention.

[0066] [Fig.4] illustrates a sectional view of an absorbent magnetic cleaning device according to a second embodiment of the invention.

[0067] [Fig.5] illustrates a perspective view of an absorbent magnetic cleaning device according to a third embodiment of the invention.

[0068] [Fig.6] illustrates a sectional view of an absorbent magnetic cleaning device according to a third embodiment of the invention.

[0069] [Fig.7] illustrates a perspective view of an absorbent magnetic cleaning device according to a fourth embodiment of the invention.

[0070] [Fig.8] illustrates a sectional view of an absorbent magnetic cleaning device according to a fourth embodiment of the invention.

[0071] [Fig.9] illustrates a perspective view of an absorbent magnetic cleaning device according to a fifth embodiment of the invention.

[0072] [Fig. 10] illustrates a sectional view of an absorbent magnetic cleaning device according to a fifth embodiment of the invention.

[0073] [Fig. 11] illustrates a first positioning of materials inside an absorbent magnetic cleaning device according to a fifth embodiment of the invention.

[0074] [Fig. 12] illustrates a second positioning of materials within an absorbent magnetic cleaning device according to the fifth embodiment of the invention.

[0075] [Fig. 13] illustrates dimensions of a perspective view of an embodiment of the invention.

[0076] [Fig. 14] illustrates dimensions of a side view of an embodiment of the invention.

[0077] [Fig. 15] illustrates dimensions of a top or bottom view of an embodiment of the invention. Detailed description

[0078] Figures 1 and 2 illustrate a perspective view and a sectional view of an absorbent magnetic cleaning device according to a first embodiment of the invention.

[0079] In particular, illustrated in these figures is a magnetic sponge 1100 comprising a deformable central core 180 and a ferromagnetic element 114, which is for example a ferromagnetic pellet or a permanent magnet.

[0080] A three-dimensional block is formed from a junction of an upper surface 120 and a lower surface 160, these two surfaces being folded on themselves so as to close a three-dimensional block (here represented by the two references 120 and 140), for example having substantially the shape of a parallelepiped. The junction of the two surfaces is preferably made at a transverse mid-plane of the device and, in doing so, a transverse mid-plane of the closed three-dimensional block, when the surfaces are folded on themselves in order to obtain a symmetrical device.

[0081] In various examples not shown, it is of course possible to include ferromagnetic pellets or permanent magnets in different corners of the device 1100, or even several along the same edge. It is thus possible to provide four magnetic elements 112, 114, 116 and 118, each arranged along one of the four edges of the sponge 1100. This provides a positioning of the ferromagnetic elements on one or more of the inner edges of the sponge.

[0082] Different combinations of materials, both for their composition and for their positioning, can be used to form the surfaces and therefore the device. Hereinafter calling the "sponge" as being the absorbent magnetic cleaning device 1000, 1100, 1200, 1300, 1400, 1500, this sponge preferably has a structure composed of several materials selected according to their specific properties, for example a microfiber surface or a scraping surface for the surface 120 or 160. The sponge further comprises a central core that can be made of a material having a magnetic property, in particular ferromagnetic. Each material of the sponge, and their combination, plays an advantageous role in the performance and functionality of the sponge.

[0083] For example, a microfiber surface may be made in the form of a terry-like knit, and comprises a blend of polyamide and polyester. This com This combination of materials provides excellent water and particle absorption capacity, while ensuring a very soft touch for the user during cleaning. A scouring surface, for example, can be created using a double-bonded fabric made of 100% polyester, using a combination of foam yarns and lamé yarns. This configuration provides a robust and effective surface for removing stubborn dirt.

[0084] In addition, the core of the sponge comprises, for example, a 100% expanded polyurethane foam or including another material having flexibility and shape memory properties. This core ensures good support for the sponge and allows it to maintain its original shape after prolonged use. Finally, a material having a magnetic property, in the present example a ferromagnetic element 114, is integrated into the sponge, thus providing the additional functionality of being able to cause the attraction or repulsion of the sponge by another magnetic element, for example a support system or a holding wall.

[0085] In the embodiments described here, the core and / or the at least one ferromagnetic element can take different forms, such as a block or a pellet having a ferromagnetic property, a ferromagnetic textile fabric.

[0086] The core can also be directly manufactured and / or doped with ferromagnetic particles. To do this, for example, the core of the sponge is made with porous materials such as silica or carbon, this core being formed in particular so as to have a uniform porous structure. Then, magnetic dopant ions, such as iron, cobalt or nickel, are introduced into the porous structure of the material. This can be achieved by techniques such as immersion in a solution containing these dopant ions, or diffusion of these dopant ions from a solid source.

[0087] Advantageously, a surprising effect is obtained by optimizing the concentration of the doping ions and the doping time to obtain a homogeneous distribution of the particles in the sponge core. Finally, the doped material can be subjected to specific heat treatments to promote the formation and growth of ferromagnetic phases within the sponge. These heat treatments can include controlled heating and cooling cycles.

[0088] In certain embodiments, doping ions are selected from ferrites, i.e. compounds of iron and metal oxide, it is possible to obtain for the sponge a double ferromagnetic and antimicrobial action, thus contributing to maintaining a high level of hygiene of the sponge during its use, ensuring its superior performance in terms of cleaning and durability.

[0089] Figures 3 and 4 illustrate a perspective view and a sectional view of an absorbent magnetic cleaning device according to a second embodiment of the invention.

[0090] In particular, illustrated in these figures is a magnetic sponge 1200 comprising a deformable central core 180 and at least one ferromagnetic element 212, which is for example a ferromagnetic pellet or a permanent magnet placed in a corner of the device, that is to say it is placed inside the three-dimensional block formed by the junction of the surfaces 120 and 160, at the level of the transverse middle plane 140 but outside the deformable central core 180, thus being close to two contiguous edges of the closed three-dimensional block.

[0091] In various examples not shown, it is of course possible to include ferromagnetic pellets or permanent magnets at different interior angles of the device 1200, or even several at the same interior angle. In particular, it is possible to provide four magnetic elements 210, 212, 214 and 216, each arranged at the four interior angles of a sponge 1200.

[0092] All the combinations of materials previously discussed can be used to form the surfaces and therefore the device of this second embodiment.

[0093] Figures 5 and 6 illustrate a perspective view and a sectional view of an absorbent magnetic cleaning device according to a third embodiment of the invention.

[0094] In particular, illustrated in these figures is a magnetic sponge 1300 comprising a deformable central core 180 and at least one ferromagnetic element 310, which is for example a ferromagnetic pellet or a permanent magnet, located at the center of the central material enclosed inside the surfaces 120 and 160, and for example inside the closed three-dimensional pad and above (or below) the level of the transverse middle plane 140. The pellet or the ferromagnetic element are located outside the deformable central core 180, close to an edge of the closed three-dimensional pad or substantially equidistant from each of the edges of the closed three-dimensional pad.

[0095] All the combinations of materials previously discussed can be used to form the surfaces and therefore the device of this third embodiment.

[0096] Alternatively or additionally, it is possible to sew or glue or hold by any other means to the textile layers, a ferromagnetic pellet or a ferromagnetic washer, of thin thickness, for example of a thickness between 1 and 5 millimeters, is sewn, glued, or held by any other means on an external surface or an internal surface of the magnetic sponge 1300. In particular, the ferromagnetic pellet or the ferromagnetic washer are located inside the closed three-dimensional pad but outside the deformable central core 180. This makes it possible to make a particular point of a surface of the magnetic sponge 1300 capable of being attracted by an external magnet while preventing the external face of this surface from has roughness or an irregular surface that could damage the surfaces to be cleaned.

[0097] Figures 7 and 8 illustrate a perspective view and a sectional view of an absorbent magnetic cleaning device according to a fourth embodiment of the invention.

[0098] In particular, illustrated in these figures is a magnetic sponge 1400 comprising a deformable central core 180 and at least one ferromagnetic element 412, which is for example a ferromagnetic pellet or a permanent magnet, located along one (or more) edge(s) of the central material enclosed inside the surfaces 120 and 160, and here inside the closed three-dimensional pad and above, below or at the same level as the transverse mid-plane 140. One or more ferromagnetic elements may be positioned inside the closed three-dimensional pad, at the transverse mid-plane and outside the deformable central core 180, close to a given edge of the closed three-dimensional pad, therefore located on one or more edges of the central material.

[0099] Just as for the three previous embodiments, this fourth embodiment can be declined in different variants according to whether the material of the upper surface 120 is made of microfiber or a scraping material, according to whether the material of the lower surface 160 is made of microfiber or a scraping material, according to whether the material of the deformable central core 180 comprises a foam such as a polyurethane foam, a gel or any other type of material with similar physical properties, and according to whether the at least one ferromagnetic element has a cylinder or parallelepiped shape.

[0100] Figures 9 and 10 illustrate a perspective view and a sectional view of an absorbent magnetic cleaning device according to a fifth embodiment of the invention.

[0101] In particular, illustrated in these figures is a magnetic sponge 1500 comprising a deformable central core 185 and at least one ferromagnetic element positioned inside the closed three-dimensional pad, above, below and / or at the level of the transverse middle plane 140.

[0102] This configuration amounts to forming in a single piece 185 the at least one ferromagnetic element and the deformable central core, here called core 185, resulting in a central material having a ferromagnetic property, and called central because this ferromagnetic material 185 is positioned within the central material of the device 1500. The core 185 is therefore itself enclosed between the surfaces 120 and 160.

[0103] Advantageously, the core 185 comprises a polyurethane foam, and is doped with ferromagnetic particles, making it possible to create a material which is both flexible and has shape memory.

[0104] The innovative and surprising properties obtained, whether for the absorbent magnetic cleaning device 1500 or for its manufacturing method, is that this configuration provides a sponge with a deformable central core that can be magnetized, for example by means of doping with a predetermined concentration of ferromagnetic particles.

[0105] [Fig. 11] illustrates a first positioning of materials inside an absorbent magnetic cleaning device according to a fifth embodiment of the invention.

[0106] In addition to the possibility of similarly forming an absorbent magnetic cleaning device according to any of the described embodiments, it is particularly illustrated how to form a double magnetic fabric 3000.

[0107] This double magnetic fabric 3000 is obtained by wrapping a central material 3500, in particular a central ferromagnetic material, over an upper face 3520 and under a lower face 3540 of the central material 3500, a fabric with magnetic properties 3400 and a material 3200. This material 3200 is chosen from a microfiber material or a scraping material. There is thus, starting from the upper face 3520 of the central material 3500, a superposition of a first fabric with magnetic properties 3400 followed by an upper material 3200 which is scraping or microfiber and, starting from the lower face 3540 of the central material 3500, a superposition of a second fabric with magnetic properties 3400 followed by a lower material 3200, which is scraping or microfiber.

[0108] The first and second magnetic property fabrics are joined and closed at the side edges of the core material 3500 such that the core material 3500 is enclosed within all of the mentioned layers of magnetic property fabric 3400 and scraping material 3200.

[0109] A magnetic sponge 3000 is thus obtained, comprising a ferromagnetic material, and formed from a ferromagnetic textile fabric placed above and / or below the central material, on all or part of the surface of this central material.

[0110] According to various variants, the central material 3500 is formed from a foam or a spongy material with properties similar to those of a sponge, for example in terms of porosity, density, absorption and permeability, for its use for cleaning.

[0111] [Fig. 12] illustrates a second positioning of materials within an absorbent magnetic cleaning device according to the fifth embodiment of the invention or an alternative of this fifth embodiment.

[0112] In particular, a simple magnetic fabric 4000 is formed here by wrapping a central material 4500, in particular a central ferromagnetic material, between two layers 4210 and 4220 of the same material or different materials. This or these material(s) is chosen from a microfiber material or a scratching material.

[0113] All or part of the upper layer 4210 and / or all or part of the lower layer 4220 further comprises, on its or their outer surface(s), a magnetic holding element 4212 and / or 4222, for example a sewing thread with magnetic property, one or more ferromagnetic staples or a ferromagnetic sewing thread. For example, it is possible to design a sewing thread with magnetic property 4212 and / or 4222 from any of the materials mentioned herein, for example 430 steel, also called AISI 430, or AISI 434 or AISI 444. Such threads can also be manufactured with stainless steel and / or high carbon steel, or plain steel with a layer of nickel or chromium.

[0114] Similarly, all or a portion of the top layer 4210 comprises on its inner surface a sewing thread 4214, for example a cotton, polyester, silk or nylon sewing thread. All or a portion of the inner surface of the layer 4222 may also comprise a sewing thread 4224.

[0115] According to different variants, a ferromagnetic sewing thread makes it possible to produce different shapes of attachment or holding elements on the internal face(s) of the microfiber or scraping material while allowing the latter to be able to react to a magnet, without however leaving roughness or protrusions appearing on the outside of the fabric 4000 which could cause scratches during cleaning.

[0116] Figures 15, 16 and 17 illustrate dimensions of an embodiment of the invention in a perspective view, a side view and a top view.

[0117] Taking the example of an absorbent magnetic cleaning device 1000 capable of representing any of the embodiments of the invention previously described, the dimensions of the device 1000 can be chosen in any order of magnitude suitable for the use of the device 1000 for cleaning household surfaces.

[0118] As shown, a first length XI of the closed three-dimensional block, and therefore of the device 1000, is chosen between 5 and 15 centimeters, for example 10 or 12 centimeters. The first length XI corresponds for example to the length of a layer of one of the two surfaces, or of another surface, which extends transversely towards the outside of each edge of the device 1000 and of the junction made to close the three-dimensional block. A second length X2 of the closed three-dimensional block, which corresponds here for example to the actual length of the closed three-dimensional block, and therefore of the device 1000 itself, is chosen between 4 and 14 centimeters, for example 11 centimeters. The second length X2 is less than the first length XL

[0119] In the case of a rectangular device, a first width Y1 of the closed three-dimensional block, and therefore of the device 1000, is chosen between 5 and 15 centimeters, by example 8 centimeters. The first width Y1 corresponds for example to the width of the layer extending transversely towards the outside of each edge of the device 1000 and of the junction made to close the three-dimensional paving stone. A second width Y2 of the closed three-dimensional paving stone, which corresponds here for example to the actual width of the closed three-dimensional paving stone, and therefore of the device 1000 itself, is chosen between 4 and 14 centimeters, for example 7 centimeters. The second width Y2 is less than the first width Y1.

[0120] Similarly, a height Z of the closed three-dimensional block, and therefore of the device 1000, is chosen between 1 and 10 centimeters, for example 2.5 centimeters.

[0121] According to other possible uses of the device 1000, for example for cleaning large surfaces, glass surfaces or industrial surfaces, much larger dimensions can be provided. The materials composing the device 1000 can be adapted to the choice of these large dimensions so as to guarantee sufficient lightness for the practical use of the device 1000 in these cases.

Claims

Claims

1. An absorbent magnetic cleaning device (1000; 1100; 1200; 1300; 1400; 1500) comprising an upper surface (120) and a lower surface (160) joined to each other to form a closed three-dimensional pad, the junction of the upper surface (120) and the lower surface (160) being made at a transverse mid-plane (140) of the closed three-dimensional pad, the device further comprising a ferromagnetic element (112, 114, 116, 118; 210, 212, 214, 216; 310; 410, 412, 414, 416) and a deformable central core (180; 185) integrated within the closed three-dimensional pad.

2. The device of claim 1, wherein the upper surface (120) and / or the lower surface (160) comprises a material selected from a microfiber material and an abrasive material.

3. Device according to claim 2, wherein the microfiber material is chosen from a terry knit composed of polyamide and / or polyester.

4. A device according to claim 2 or 3, wherein the abrasive material comprises a double bonded polyester fabric formed of foam yarns and / or lamé yarns.

5. Device according to any one of the preceding claims, in which the deformable central core (180; 185) is formed from a material chosen from an expanded polyurethane foam and a shape memory element.

6. A device according to any preceding claim, wherein the ferromagnetic element (112, 114, 116, 118; 210, 212, 214, 216; 310; 410, 412, 414, 416) is selected from a ferromagnetic pellet, a permanent magnet and a ferromagnetic textile fabric.

7. Device according to any one of claims 1 to 6, in which the ferromagnetic element (112, 114, 116, 118; 210, 212, 214, 216; 310; 410, 412, 414, 416) and the deformable central core (180; 185) are formed from a single piece (185).

8. A device according to any one of claims 1 to 6, wherein the ferromagnetic element (112, 114, 116, 118; 210, 212, 214, 216; 310; 410, 412, 414, 416) comprises at least one ferromagnetic pellet or permanent magnet, the at least one ferromagnetic pellet or permanent magnet being positioned at inside the closed three-dimensional block, at the transverse mid-plane (140) and outside the deformable central core (180; 185), near an edge of the closed three-dimensional block.

9. A device according to any one of claims 1 to 6, wherein the ferromagnetic element (112, 114, 116, 118; 210, 212, 214, 216; 310; 410, 412, 414, 416) comprises at least one ferromagnetic pellet or one permanent magnet, the at least one ferromagnetic pellet or the at least one permanent magnet being positioned inside the closed three-dimensional pad, at the transverse middle plane (140) and outside the deformable central core (180; 185), close to two edges of the closed three-dimensional pad.

10. A device according to any one of claims 1 to 6, wherein the ferromagnetic element (112, 114, 116, 118; 210, 212, 214, 216; 310; 410, 412, 414, 416) comprises a ferromagnetic pellet or a permanent magnet, the ferromagnetic pellet or the permanent magnet being positioned inside the closed three-dimensional pad, at the transverse middle plane (140) and inside the deformable central core (180; 185).

11. A device according to any one of claims 1 to 6, wherein the ferromagnetic element (112, 114, 116, 118; 210, 212, 214, 216; 310; 410, 412, 414, 416) comprises at least one ferromagnetic pellet or permanent magnet, the at least one ferromagnetic pellet or permanent magnet being positioned inside the closed three-dimensional pad, at the transverse mid-plane (140) and inside the deformable central core (180; 185), close to an edge of the deformable central core (180; 185).

12. A method of manufacturing the absorbent magnetic cleaning device (1000; 1100; 1200; 1300; 1400; 1500) according to any one of claims 1 to 11, comprising the following steps: a. providing the deformable central core (180; 185) and the ferromagnetic element (112, 114, 116, 118; 210, 212, 214, 216; 310; 410, 412, 414, 416), b. forming a closed three-dimensional pad around the provided deformable central core (180; 185) adjoining the upper surface (120) and the lower surface (160) to each other at a transverse mid-plane (140) of the closed three-dimensional pad, and c. inserting the ferromagnetic element (112, 114, 116, 118; 210, 212, 214, 216; 310; 410, 412, 414, 416) into the closed three-dimensional block.

13. The method of claim 12, wherein the step of inserting the ferromagnetic element (112, 114, 116, 118; 210, 212, 214, 216; 310; 410, 412, 414, 416) into the closed three-dimensional block is preceded by a step c0) of incising the upper surface (120), the lower surface (160) and / or the deformable central core (180; 185), the incision being adapted to then insert the ferromagnetic element (210, 212, 214, 216; 310; 410, 412, 414, 416) into the closed three-dimensional block.

14. A method according to claim 12 or 13, wherein the step of providing the deformable central core (180; 185) and the ferromagnetic element (210, 212, 214, 216; 310; 410, 412, 414, 416) comprises a step a0) of forming in one piece the deformable central core (180; 185) and the ferromagnetic element (210, 212, 214, 216; 310; 410, 412, 414, 416), the piece being called a core, and a step a1) of doping the core with ferromagnetic particles.

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