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EP0267855A2 - Mattress with ventilating cavities - Google Patents

Mattress with ventilating cavities Download PDF

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Publication number
EP0267855A2
EP0267855A2 EP87402563A EP87402563A EP0267855A2 EP 0267855 A2 EP0267855 A2 EP 0267855A2 EP 87402563 A EP87402563 A EP 87402563A EP 87402563 A EP87402563 A EP 87402563A EP 0267855 A2 EP0267855 A2 EP 0267855A2
Authority
EP
European Patent Office
Prior art keywords
mattress
grooves
cells
depth
groove
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.)
Granted
Application number
EP87402563A
Other languages
German (de)
French (fr)
Other versions
EP0267855A3 (en
EP0267855B1 (en
Inventor
Alain Boselli
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dunlop France SA
Original Assignee
Dunlop France SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dunlop France SA filed Critical Dunlop France SA
Priority to AT87402563T priority Critical patent/ATE93371T1/en
Publication of EP0267855A2 publication Critical patent/EP0267855A2/en
Publication of EP0267855A3 publication Critical patent/EP0267855A3/en
Application granted granted Critical
Publication of EP0267855B1 publication Critical patent/EP0267855B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/14—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays
    • A47C27/142—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays with projections, depressions or cavities
    • A47C27/146—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays with projections, depressions or cavities on the outside surface of the mattress or cushion
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C21/00—Attachments for beds, e.g. sheet holders or bed-cover holders; Ventilating, cooling or heating means in connection with bedsteads or mattresses
    • A47C21/04—Devices for ventilating, cooling or heating
    • A47C21/042—Devices for ventilating, cooling or heating for ventilating or cooling
    • A47C21/046—Devices for ventilating, cooling or heating for ventilating or cooling without active means, e.g. with openings or heat conductors

Definitions

  • the invention relates to a mattress comprising a layer of flexible material generally covered with a cover, which has a lower face by which the mattress can bear on a bed base, and an upper face intended to receive the body of a person, each side being delimited by an edge. It may be a mattress fitted to a bed or a sofa, but also a smaller mattress fitted to an armchair, or a pillow.
  • the mattress can deform under the weight of the body to conform to its shapes, but also return to its original shape after stress.
  • the object of the invention is therefore to provide a mattress of the aforementioned type, comprising means for reducing its aging by humidity.
  • the underside of the mattress has a plurality of cavities.
  • each cavity plays the role of an air-filled bellows which, when the mattress is compressed by the weight of the body, is itself compressed and expels this air.
  • the air within each cavity is thus renewed.
  • the turbulence created also promotes air circulation in the vicinity of the cavity, that is to say at the interface between the mattress and the box spring.
  • said cavities comprise a plurality of grooves substantially parallel and spaced from each other, and each having two ends by which they open on the edge of the underside.
  • the grooves advantageously extend transversely.
  • the mattress has, in its length, a central region bordered by two end regions, a plurality of cells being spaced apart along each groove in the two regions d end, each cell extending from the bottom of the groove to the upper face of the mattress so as to locally increase the depth of the groove.
  • the dimensions and the arrangement of the grooves and of the cells are advantageously chosen so that, when the mattress rests on the bed base, these each have an area leading to the open air.
  • the depth of the grooves is substantially constant while that of the cells is all the more important as these cells are distant from the longitudinal and transverse median axes of the mattress.
  • the mattress When the mattress is intended to receive two people side by side, it advantageously has a central zone extending over the entire length of the mattress and in which the depth of the grooves is reduced.
  • the upper face of the mattress has a plurality of grooves whose depth is substantially constant and less than that of the grooves on the lower face.
  • Figures 1 to 5 a polyurethane foam mattress in one piece, which has the shape of a rectangular plate of longitudinal axis 1 and transverse axis 2, having a face lower 3 intended to bear on a bed base and an upper face 4 intended to support the body of an elongated person, these faces being respectively delimited by an edge 5, 6.
  • the lower face 3 carries sixteen substantially transverse grooves and spaced substantially equidistant from each other, which all lead to the edge 5 of this face.
  • the mattress has a central region bordered by two end regions.
  • the central region comprises eight identical grooves 10 to 80 in the form of an arc, distributed symmetrically with respect to the transverse axis 2, each groove having its convexity turned towards the transverse axis.
  • each arc-shaped groove decreases slightly from the longitudinal axis 1 towards the edge 5 of the mattress.
  • a cell (11, 12) (21, 22) ... (81, 82) of oval shape is arranged in line with the corresponding groove 10, 20, ... 80, at each of the ends of the groove and a short distance from the edge 5 of the mattress. This cell locally doubles the width of the groove. There are therefore a total of sixteen cells in line with the various arc-shaped grooves.
  • each arc-shaped groove 10 to 80 and each cell (11,12) to (81,82) has the shape of a V and has a rounded bottom.
  • the depth of the arc-shaped groove 10 is constant over its entire length, with the exception of the ends where it is appreciably greater (that is to say more than three times greater) at the level of the cell. (11,12) to (81,82), as appears in Figure 3 where the cell 11 is visible. Then, between the cell 11 and the edge 5 of the underside 3 of the mattress, the groove 10 has in section a shape of a ramp 13, 14 thanks to which its depth gradually decreases up to zero towards the edge 5. In the absence of such ramps 13, 14, the mattress once dressed with a cover would have dex unsightly hollows in the vicinity of the edge 5 of the mattress. It also appears from FIG. 3 that all the arcuate grooves, such as 10, 20, 30, 40, have the same depth with respect to each other, since these grooves are identical.
  • each of these cells is connected to the edge 5 by a groove in the form of a ramp identical to the ramp 13 visible in FIGS. 1 and 3.
  • the two end regions of the mattress each have four grooves 110, 120, 130, 140 and 150, 160, 170, 180.
  • Each groove zigzag across the mattress in six segments .
  • To the right of each segment is a cell.
  • the zigzag groove 110 comprises six cells 111 to 116
  • the zigzag groove 160 comprises six cells 161 to 166.
  • These cells are, seen in plan only, identical in shape and in dimensions to the cells relating to the arc-shaped grooves.
  • the cells 111 to 116 of the same zigzag groove 110 are connected two by two by a portion of groove 117 whose width is equal to approximately half that of the cells. Finally, the two cells 111, 114 adjacent to the edge 5 of the mattress are connected to the latter by a portion of groove 118 in the form of a ramp identical to the ramp 13 visible in FIGS. 1 and 3.
  • All the zigzag grooves are, seen in plan only, identical to each other, those 110, 120, 130, 140 of a first end region being symmetrical with those 150, 160, 170, 180 of the second end region , relative to the transverse axis 2 of the mattress.
  • the two zigzag grooves 140, 180, adjacent respectively to the two arc-shaped grooves 10, 50 have in common with the last two cells.
  • the two cells 144 and 141 of the zigzag groove 140 constitute the two cells 12, 11 of the arc-shaped groove 10.
  • each zigzag groove is arranged as shown on the right-hand side of FIG. 3, where one half of the zigzag groove 140 is visible and extends from the edge 5 of the mattress to the median longitudinal plane 7 of the mattress.
  • the depth of the zigzag groove, at the groove portions 117 is equal to the half that of the arcuate grooves 10 to 80.
  • the depth of the cell 141 near the edge 5 of the mattress is equal to seven times the depth of the groove portions 117, while the depth of the two cells 142 and 143 is only five times the depth of the groove portions 117.
  • the other half of the zigzag groove 140 is symmetrical to that described above with respect to the median longitudinal plane 7 of the mattress.
  • the groove portions 117 all have the same depth whatever the zigzag groove considered.
  • the cell 124 adjacent to the edge 5 has a depth equal to that of the cell 141, or equal to seven times the depth of the groove portions 117.
  • the cell 125 has a depth equal to six times that of the groove portions 117 and the cell 136 a depth of between five and six times that of the groove portions 117. Dashed lines highlight the differences in depth of the cells.
  • the cells such as 141 the most distant from the longitudinal axis 1 of the mattress and located in the vicinity of the edge 5 of the mattress have a depth greater than that of the other cells such as 142, 143 located closer to the longitudinal axis 1. It will however be noted that the depth of the cells 142 and 143 is the same, although they are at a different distance from the longitudinal axis 1.
  • the cells such as 143,136,125 which are not the most distant from the longitudinal axis 1 however have increasing depths insofar as they are located at increasing distances from the transverse axis 2 of the mattress.
  • Figure 2 illustrates the evolution of the depth of the cells of the different zigzag grooves, along the longitudinal axis 1 of the mattress. This figure is symmetrical with respect to the median transverse plane 8 of the mattress. On the left-hand side of FIG. 2, the cells 146, 136, 126 and 116 follow one another in different section planes; they belong respectively to the zigzag grooves 140, 130, 120 and 110.
  • the transverse plane 8 - since these cells are located at increasing distances from the transverse axis 2 - here the transverse plane 8 - and since they are not peripheral cells, with the exception of cell 116, their depth is increasing.
  • the depths of the cells 146, 136, 126 and 116 are respectively a little less than five times, a little more than five times, six times and seven times the depth of the groove portions 117.
  • the width of the different grooves preferably varies between 10 and 60 mm, in the present case between 20 and 40 mm, the mattress having a width of 900 mm.
  • the cells preferably have a length between 80 and 160 mm, in the present case a length of 120 mm, and a width preferably between 30 and 90 mm, in the present case a width of 60 mm.
  • the depth of the grooves is preferably between 5 and 40 mm for a mattress thickness equal to 130 mm; in this case this depth varies between 15 and 30 mm.
  • the depth of the cells will preferably be between 50 and 110 mm; in the present case, it varies between 70 and 100 mm.
  • the dimensions of the cavities will be chosen according to those of the mattress and the weight it is intended to support.
  • the dimensions and the shape of the cavities vary over the extent of the mattress to take account of the forces which will be applied locally, and which themselves vary on the extent of the mattress.
  • a person is stretched out on the mattress, he places a heavy load on the mattress in its central region supporting the weight of the trunk and buttocks, while he places much less stress on the mattress in the end regions which only support the weight of head or legs.
  • the depth of the cavities is a determining parameter since it fixes the thickness of the mattress correspondingly to the right of these cavities.
  • an area of the mattress will be all the more capable of supporting a weight as its thickness will be significant and will thus allow significant compression of the mattress.
  • the variations in depth of the cavities - that is to say the variations in thickness of the mattress - are linked to the distribution of the weight of the body on the mattress.
  • the central region only has cavities - in this case grooves - whose depth is small compared to the thickness of the mattress, while at the periphery of the mattress the proportions are reversed.
  • the depth of the groove portions 117 (FIG. 3) was chosen to be small to promote the flow of the material during molding. Indeed, the mold will have several bumps corresponding to the different cells, which will oppose, by their height, the distribution of the material, but it will also have several ribs of low height corresponding to the different groove portions, which will not oppose only very slightly to the distribution of matter.
  • a deep cavity in the mattress cannot extend continuously over a great length.
  • the arcuate grooves 10 to 80 ( Figures 1 and 2) can extend continuously, since they have a shallow depth.
  • the dimensions and shapes of the cavities also respond to other concerns. First of all, make sure that the cavities are not blocked by the box spring.
  • the bed bases that can be envisaged are those comprising a mesh, a stretched fabric, or even rigid slats arranged in parallel and spaced from one another, or other bed bases do not have a continuous and impermeable surface which would plug the cavities.
  • the mattress shown in the figures was designed in particular for a slatted base.
  • three slats 201 to 203 have been shown.
  • the arc-shaped grooves such as 50 and the zigzag grooves such as 180 each extend, in the direction of the longitudinal axis 1 of the mattress, over a distance determined according to the standard dimensions of commercial slats, included in a known range of dimensions, and depending on the space of these slats.
  • the arc-shaped groove 50 has several zones opening into the open air.
  • each cell of the zigzag groove 180 has at least one zone opening into the open air.
  • the different orientation of two adjacent cells 181, 182 of the same zigzag groove 180 makes it possible to reinforce the rigidity of the mattress, more precisely to avoid buckling of the side wall 210 of the mattress ( Figures 2 and 3) .
  • the symmetry of the entire mattress with respect to its longitudinal 1 and transverse 2 axes likewise contributes to strengthening the rigidity of the mattress.
  • the upper face 4 of the mattress also carries cavities. These are parallel grooves 300 which extend across the mat spaced apart. Each groove 300 has a uniform width and depth; it ends at a certain distance from the edge 6 of the upper face 4. Each groove 300 has, in section, the shape of a V.
  • the width and depth of the grooves are very small.
  • the width is preferably between 8 and 16 mm, and in this case equal to 12 mm.
  • the depth is preferably between 3 and 9 mm, and in this case equal to 6 mm.
  • the double mattress is intended to receive two people. It has a longitudinal axis 401 and a transverse axis 402. On either side of the longitudinal axis 401 are provided two identical patterns of cavities 500, 600, similar to the pattern in FIG. 1.
  • Each pattern therefore comprises respectively eight grooves 510, 610 in the form of an arc in a central region, and four zigzag grooves 520, 620 in two end regions.
  • the connection between the two patterns 500 and 600 is illustrated in FIG. 7.
  • the cell 521 of the zigzag groove 520 joins the median longitudinal plane 403 of the mattress, by a ramp 522.
  • the cell 621 of the groove in zigzag 620 joins this plane by a ramp 622.
  • This compact median zone 404 produces an isolation between the two parts 500, 600 of the double mattress, in the sense that the movements of a person on the part 500 will be little felt by the person being on the part 600.
  • the median zone 404 contributes also to oppose the buckling of the side wall of the double mattress.
  • the upper surface of the double mattress has two patterns similar to that of FIG. 4.
  • the cavities of the mattress according to the invention do not weaken it, but on the contrary strengthen it. Indeed, the external surface of the mattress is increased by each of the cavities. However, this outer surface carries a "skin" of the molding whose rigidity is greater than the material constituting the core of the mattress.
  • the mattress shown in the figures achieves an advantageous compromise.
  • the mechanical behavior of the foam and ignoring the presence of moisture it is when the foam is the most massive that it has the best performance and even that its mechanical characteristics are best preserved in the time.
  • the material constituting the mattress may have a density and a hardness - or lift - variable along the mattress.
  • the central region devoid of cells - or core of the mattress - will have a higher density than the peripheral regions provided with cells, so that it is even more massive.
  • this central region will have a lower hardness than the peripheral regions: it is indeed desirable that the feeling of suppleness of the mattress is felt especially in the central region to adapt to the body.
  • a density of 48 kg / m3 and a hardness according to standard NF.T. 56110 of 35 g / cm2 were chosen for the central region, while a density of 40 kg / m3 and a hardness of 40 g / cm2 were chosen for the peripheral regions.
  • the density may vary between 35 and 70 kg / m3, and the hardness between 20 and 80 g / cm2.
  • All the characteristics of the present invention apply particularly well to mattresses fitted to a bed, and having the standard dimensions of the bedding (width between 0.7 m and 1.60 m, and length between 1.90 m and 2 m).

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  • Mattresses And Other Support Structures For Chairs And Beds (AREA)

Abstract

L'invention est relative à un matelas comprenant une couche en un matériau souple présentant une face inférieure (3) par laquelle le matelas peut prendre appui sur un sommier, et un face supérieure (4) destinée à recevoir le corps d'une personne, chaque face étant délimitée par un bord (5). Selon l'invention, la face inférieure (3) présente une pluralité de cavités (10, 110). Application à l'industrie de la literie.The invention relates to a mattress comprising a layer of flexible material having a lower face (3) by which the mattress can bear on a bed base, and an upper face (4) intended to receive the body of a person, each face being delimited by an edge (5). According to the invention, the lower face (3) has a plurality of cavities (10, 110). Application to the bedding industry.

Description

L'invention est relative à un matelas comprenant une couche en un matériau souple générale­ment habillée d'une housse, qui présente une face infé­rieure par laquelle le matelas peut prendre appui sur un sommier, et une face supérieure destinée à recevoir le corps d'une personne, chaque face étant délimitée par un bord. Il peut s'agir d'un matelas équipant un lit ou un canapé, mais aussi d'un matelas de plus faibles dimensions équipant un fauteuil, ou un oreiller.The invention relates to a mattress comprising a layer of flexible material generally covered with a cover, which has a lower face by which the mattress can bear on a bed base, and an upper face intended to receive the body of a person, each side being delimited by an edge. It may be a mattress fitted to a bed or a sofa, but also a smaller mattress fitted to an armchair, or a pillow.

Grâce à son élasticité, le matelas peut se déformer sous le poids du corps pour épouser les formes de celui-ci, mais aussi reprendre sa forme initiale après sollicitation.Thanks to its elasticity, the mattress can deform under the weight of the body to conform to its shapes, but also return to its original shape after stress.

Il a été observé qu'à l'usage, les propriétés d'élasticité du matelas décroissaient et que celui-ci avait donc tendance à conserver sa déformation. Il en résulte que le matelas n'est alors plus en mesure d'épouser correctement les formes du corps, et donc de les supporter efficacement. Par ailleurs, une telle déformation permanente est inesthétique.It has been observed that in use, the elasticity properties of the mattress decrease and that it therefore tends to retain its deformation. As a result, the mattress is then no longer able to properly conform to the shapes of the body, and therefore to support them effectively. Furthermore, such a permanent deformation is unsightly.

La Demanderesse a découvert que le vieillissement d'un matelas, c'est-à-dire la dégradation de ses caractéristiques élastiques, résultait non seulement des cycles répétés de compression et d'expansion qu'il subit, mais aussi de la présence d'humidité dans sa masse.The Applicant has discovered that the aging of a mattress, that is to say the degradation of its elastic characteristics, results not only from the repeated cycles of compression and expansion which it undergoes, but also from the presence of humidity in its mass.

Elle a aussi découvert que la partie inférieure du matelas présentait le taux d'humidité le plus important.She also discovered that the bottom of the mattress had the highest humidity.

Le but de l'invention est donc de pro­poser un matelas du type précité, compre­nant des moyens pour réduire son vieillissement par l'humidité.The object of the invention is therefore to provide a mattress of the aforementioned type, comprising means for reducing its aging by humidity.

Selon l'invention, la face inférieure du matelas présente une pluralité de cavités.According to the invention, the underside of the mattress has a plurality of cavities.

Ainsi, la surface de contact entre le matelas et le sommier est réduite, les zones non en contact bénéficiant donc de la présence de l'air environ­nant.Thus, the contact surface between the mattress and the bed base is reduced, the areas not in contact therefore benefiting from the presence of the surrounding air.

De plus, chaque cavité joue le rôle d'un soufflet gorgé d'air qui, lorsque le matelas est comprimé par le poids du corps, est elle-même comprimée et expulse cet air. L'air au sein de chaque cavité est ainsi renouvelé. La turbulence créée favorise aussi la circulation d'air au voisinage de la cavité, c'est-­à-dire à l'interface entre le matelas et le sommier.In addition, each cavity plays the role of an air-filled bellows which, when the mattress is compressed by the weight of the body, is itself compressed and expels this air. The air within each cavity is thus renewed. The turbulence created also promotes air circulation in the vicinity of the cavity, that is to say at the interface between the mattress and the box spring.

La Demanderesse a constaté qu'un tel matelas présentait une résistance satisfaisante au vieillissement par l'humidité.The Applicant has found that such a mattress had satisfactory resistance to aging by humidity.

De préférence lesdites cavités comprennent une pluralité de rainures sensiblement parallèles et espacées les unes des autres, et présentant chacune deux extrémités par lesquelles elles débouchent sur le bord de la face inférieure.Preferably said cavities comprise a plurality of grooves substantially parallel and spaced from each other, and each having two ends by which they open on the edge of the underside.

Dans le cas où le matelas présente une forme rectangulaire, les rainures s'étendent avantageuse­ment transversalement.In the case where the mattress has a rectangular shape, the grooves advantageously extend transversely.

Selon une forme de réalisation préférée de l'invention, le matelas présente, dans sa longueur, une région centrale bordée par deux régions d'extrémité, une pluralité d'alvéoles étant disposées de façon espacée le long de chaque rainure dans les deux régions d'extré­mité, chaque alvéole s'étendant à partir du fond de la rainure vers la face supérieure du matelas de façon à augmenter localement la profondeur de la rainure.According to a preferred embodiment of the invention, the mattress has, in its length, a central region bordered by two end regions, a plurality of cells being spaced apart along each groove in the two regions d end, each cell extending from the bottom of the groove to the upper face of the mattress so as to locally increase the depth of the groove.

Lorsque le matelas est destiné à équiper un sommier comprenant une pluralité de lattes espacées les unes des autres, les dimensions et la disposition des rainures et des alvéoles sont avanta­geusement choisies de façon que, lorsque le matelas repose sur le sommier, celles-ci présentent chacune une zone débouchant à l'air libre.When the mattress is intended to equip a bed base comprising a plurality of slats spaced apart from each other, the dimensions and the arrangement of the grooves and of the cells are advantageously chosen so that, when the mattress rests on the bed base, these each have an area leading to the open air.

De préférence, la profondeur des rainures est sensiblement constante tandis que celle des alvéoles est d'autant plus importante que ces alvéoles sont éloignées des axes médians longitudinal et transversal du matelas.Preferably, the depth of the grooves is substantially constant while that of the cells is all the more important as these cells are distant from the longitudinal and transverse median axes of the mattress.

Lorsque le matelas est destiné à recevoir deux personnes côte à côte, il présente avantageusement une zone médiane s'étendant sur toute la longueur du matelas et dans laquelle la profondeur des rainures est réduite.When the mattress is intended to receive two people side by side, it advantageously has a central zone extending over the entire length of the mattress and in which the depth of the grooves is reduced.

En complément, la face supérieure du matelas présente une pluralité de rainures dont la pro­fondeur est sensiblement constante et inférieure à celle des rainures de la face inférieure.In addition, the upper face of the mattress has a plurality of grooves whose depth is substantially constant and less than that of the grooves on the lower face.

D'autres détails et avantages de l'in­vention apparaîtront au cours de la description qui suit, d'une forme préférée de réalisation non limitative, en regard des dessins annexés, sur lesquels :

  • La figure 1 est une vue de dessous du matelas selon l'invention.
  • La figure 2 est une vue en coupe longi­tudinale selon la ligne brisée II-II de la figure 1.
  • La figure 3 est une vue en coupe trans­versale selon la ligne brisée III-III de la figure 1.
  • La figure 4 est une vue de dessus du matelas selon l'invention.
  • La figure 5 est une vue en coupe partielle selon la ligne V-V de la figure 4.
  • La figure 6 est une vue de dessous d'un matelas pour deux personnes, et
  • La figure 7 est une vue en coupe partielle selon la ligne VII-VII de la figure 6.
Other details and advantages of the invention will appear during the following description, of a preferred non-limiting embodiment, with reference to the appended drawings, in which:
  • Figure 1 is a bottom view of the mattress according to the invention.
  • FIG. 2 is a view in longitudinal section along the broken line II-II of FIG. 1.
  • Figure 3 is a cross-sectional view along the broken line III-III of Figure 1.
  • Figure 4 is a top view of the mattress according to the invention.
  • FIG. 5 is a view in partial section along the line VV in FIG. 4.
  • FIG. 6 is a bottom view of a mattress for two people, and
  • FIG. 7 is a partial sectional view along the line VII-VII of FIG. 6.

Sur les figures 1 à 5 est représenté un matelas en mousse de polyuréthanne moulé d'une seule pièce, qui a la forme d'une plaque rectangulaire d'axe longitudinal 1 et d'axe transversal 2, présentant une face inférieure 3 destinée à prendre appui sur un sommier de lit et une face supérieure 4 destiné à supporter le corps d'une personne allongée, ces faces étant respectivement délimitées par un bord 5, 6.In Figures 1 to 5 is shown a polyurethane foam mattress in one piece, which has the shape of a rectangular plate of longitudinal axis 1 and transverse axis 2, having a face lower 3 intended to bear on a bed base and an upper face 4 intended to support the body of an elongated person, these faces being respectively delimited by an edge 5, 6.

La face inférieure 3 porte seize rainures sensiblement transversales et espacées de façon sensi­blement équidistante les unes des autres, qui débouchent toutes sur le bord 5 de cette face.The lower face 3 carries sixteen substantially transverse grooves and spaced substantially equidistant from each other, which all lead to the edge 5 of this face.

Observé dans sa longueur, le matelas présente une région centrale bordée par deux régions d'extrémité. La région centrale comporte huit rainures identiques 10 a 80 en forme d'arc, réparties symétriquement par rapport à l'axe transversal 2, chaque rainure ayant sa convexité tournée vers l'axe transversal.Observed in its length, the mattress has a central region bordered by two end regions. The central region comprises eight identical grooves 10 to 80 in the form of an arc, distributed symmetrically with respect to the transverse axis 2, each groove having its convexity turned towards the transverse axis.

La largeur de chaque rainure en forme d'arc décroît légèrement depuis l'axe longitudinal 1 en direction du bord 5 du matelas. Toutefois, une alvéole (11, 12) (21, 22)...(81, 82) de forme ovale est disposée au droit de la rainure correspondante 10, 20, ... 80, à chacune des extrémités de la rainure et à faible distance du bord 5 du matelas. Cette alvéole double loca­lement la largeur de la rainure. Il y a donc au total seize alvéoles au droit des différentes rainures en forme d'arc.The width of each arc-shaped groove decreases slightly from the longitudinal axis 1 towards the edge 5 of the mattress. However, a cell (11, 12) (21, 22) ... (81, 82) of oval shape is arranged in line with the corresponding groove 10, 20, ... 80, at each of the ends of the groove and a short distance from the edge 5 of the mattress. This cell locally doubles the width of the groove. There are therefore a total of sixteen cells in line with the various arc-shaped grooves.

Vue en coupe, chaque rainure en forme d'arc 10 à 80 et chaque alvéole (11,12) à (81,82) a la forme d'un V et présente un fond arrondi.Sectional view, each arc-shaped groove 10 to 80 and each cell (11,12) to (81,82) has the shape of a V and has a rounded bottom.

La profondeur de la rainure en forme d'arc 10 est constante sur toute sa longueur, à l'exception des extrémités où elle est sensiblement plus importante (c'est-à-dire plus de trois fois supérieure) au droit de l'alvéole (11,12) à (81,82),comme cela apparaît sur la figure 3 où l'alvéole 11 est visible. Puis, entre l'alvéole 11 et le bord 5 de la face inférieure 3 du mate­las, la rainure 10 présente en coupe une forme de rampe 13, 14 grâce à laquelle sa profondeur diminue progressivement jusqu'à zéro en direction du bord 5. En l'absence de telles rampes 13, 14, le matelas une fois habillé d'une housse présenterait dex creux inesthétiques au voisinage du bord 5 du matelas. Il ressort aussi de la figure 3 que toutes les rainures en forme d'arc,telles que 10, 20, 30, 40, présentent la même profondeur les unes par rapport aux autres, puisque ces rainures sont identiques.The depth of the arc-shaped groove 10 is constant over its entire length, with the exception of the ends where it is appreciably greater (that is to say more than three times greater) at the level of the cell. (11,12) to (81,82), as appears in Figure 3 where the cell 11 is visible. Then, between the cell 11 and the edge 5 of the underside 3 of the mattress, the groove 10 has in section a shape of a ramp 13, 14 thanks to which its depth gradually decreases up to zero towards the edge 5. In the absence of such ramps 13, 14, the mattress once dressed with a cover would have dex unsightly hollows in the vicinity of the edge 5 of the mattress. It also appears from FIG. 3 that all the arcuate grooves, such as 10, 20, 30, 40, have the same depth with respect to each other, since these grooves are identical.

Entre les deux rainures 40, 80 en forme d'arc avoisinant l'axe transversal 2 et au voisinage du bord 5, sont disposées symétriquement par rapport à l'axe longitudinal 1 deux paires de deux alvéoles (91, 93) et (92, 94), les alvéoles de chaque paire étant elles-mêmes symétriques par rapport à l'axe transversal. Chacune de ces alvéoles est reliée au bord 5 par une rainure en forme de rampe indentique à la rampe 13 visible sur les figures 1 et 3.Between the two grooves 40, 80 in the form of an arc adjoining the transverse axis 2 and in the vicinity of the edge 5, are arranged symmetrically with respect to the longitudinal axis 1 two pairs of two cells (91, 93) and (92, 94), the cells of each pair being themselves symmetrical with respect to the transverse axis. Each of these cells is connected to the edge 5 by a groove in the form of a ramp identical to the ramp 13 visible in FIGS. 1 and 3.

Comme cela apparaît sur la figure 1, les deux régions d'extrémité du matelas comportent chacune quatre rainures 110, 120, 130, 140 et 150, 160, 170, 180. Chaque rainure s'étend en zigzag en travers du matelas selon six segments. Au droit de chaque segment est dis­posée une alvéole. Par exemple, la rainure en zigzag 110 comprend six alvéoles 111 à 116, la rainure en zigzag 160 comprend six alvéoles 161 à 166. Il y a donc au total quarante-huit alvéoles au droit des différentes rainures en zigzag. Ces alvéoles sont, vues en plan seulement, identiques en forme et en dimensions aux alvéoles relatives aux rainures en forme d'arc.As shown in Figure 1, the two end regions of the mattress each have four grooves 110, 120, 130, 140 and 150, 160, 170, 180. Each groove zigzag across the mattress in six segments . To the right of each segment is a cell. For example, the zigzag groove 110 comprises six cells 111 to 116, the zigzag groove 160 comprises six cells 161 to 166. There are therefore a total of forty-eight cells in line with the different zigzag grooves. These cells are, seen in plan only, identical in shape and in dimensions to the cells relating to the arc-shaped grooves.

Les alvéoles 111 à 116 d'une même rainure en zigzag 110 sont reliées deux à deux par une portion de rainure 117 dont la largeur est égale à environ la moitié de celle des alvéoles. Enfin les deux alvéoles 111, 114 voisines du bord 5 du matelas sont reliées à celui-ci par une portion de rainure 118 en forme de rampe identique à la rampe 13 visible sur les figures 1 et 3.The cells 111 to 116 of the same zigzag groove 110 are connected two by two by a portion of groove 117 whose width is equal to approximately half that of the cells. Finally, the two cells 111, 114 adjacent to the edge 5 of the mattress are connected to the latter by a portion of groove 118 in the form of a ramp identical to the ramp 13 visible in FIGS. 1 and 3.

Toutes les rainures en zigzag sont, vues en plan seulement, identiques entre elles, celles 110, 120, 130, 140 d'une première région d'extrémité étant symétriques de celles 150, 160, 170, 180 de la seconde région d'extrémité, par rapport à l'axe transversal 2 du matelas. Toutefois, les deux rainures en zigzag 140, 180, voisines respectivement des deux rainures en forme d'arc 10, 50, ont en commun avec des dernières deux alvéoles. Ainsi les deux alvéoles 144 et 141 de la rainure en zigzag 140 constituent les deux alvéoles 12, 11 de la rainure en forme d'arc 10.All the zigzag grooves are, seen in plan only, identical to each other, those 110, 120, 130, 140 of a first end region being symmetrical with those 150, 160, 170, 180 of the second end region , relative to the transverse axis 2 of the mattress. However, the two zigzag grooves 140, 180, adjacent respectively to the two arc-shaped grooves 10, 50, have in common with the last two cells. Thus the two cells 144 and 141 of the zigzag groove 140 constitute the two cells 12, 11 of the arc-shaped groove 10.

Il ressort clairement de la figure 1 que la disposition et la forme des rainures ont été choisies de façon qu'aucune portion importante de la face infé­rieure 3 du matelas soit dépourvue de rainures, mais qu'au contraire l'espacement entre les différentes rainures soit régulier.It is clear from FIG. 1 that the arrangement and the shape of the grooves have been chosen so that no significant portion of the underside 3 of the mattress is devoid of grooves, but on the contrary the spacing between the different grooves is regular.

Vue en coupe, chaque rainure en zigzag est agencée comme représenté sur la partie droite de la figure 3, où une moitié de la rainure en zigzag 140 est visible et s'étend depuis le bord 5 du matelas jusqu'au plan longitudinal médian 7 du matelas.Sectional view, each zigzag groove is arranged as shown on the right-hand side of FIG. 3, where one half of the zigzag groove 140 is visible and extends from the edge 5 of the mattress to the median longitudinal plane 7 of the mattress.

On reconnaît tout d'abord la rampe 13, puis les alvéoles 141, 142 et 143 séparées les unes des autres par les portions de rainure 117. La profondeur de la rainure en zigzag, au niveau des portions de rainure 117, est égale à la moitié de celle des rainures 10 à 80 en forme d'arc. La profondeur de l'alvéole 141 voisine du bord 5 du matelas est égale à sept fois la profondeur des portions de rainure 117, tandis que la profondeur des deux alvéoles 142 et 143 est égale à seulement cinq fois la profondeur des portions de rai­nure 117.We first recognize the ramp 13, then the cells 141, 142 and 143 separated from each other by the groove portions 117. The depth of the zigzag groove, at the groove portions 117, is equal to the half that of the arcuate grooves 10 to 80. The depth of the cell 141 near the edge 5 of the mattress is equal to seven times the depth of the groove portions 117, while the depth of the two cells 142 and 143 is only five times the depth of the groove portions 117.

L'autre moitié de la rainure en zigzag 140 est symétrique de celle décrite ci-dessus par rapport au plan longitudinal médian 7 du matelas.The other half of the zigzag groove 140 is symmetrical to that described above with respect to the median longitudinal plane 7 of the mattress.

Sur la partie gauche de la figure 3, et à partir du bord 5 du matelas, s'étend une rampe 15, puis les alvéoles 124 et 125 de la rainure en zigzag 120, et enfin dans un autre plan de coupe l'alvéole 136 de la rainure en zigzag 130. Les portions de rainure 117 ont toutes la même profondeur quelque soit la rainure en zigzag considérée. L'alvéole 124 voisine du bord 5 a une profondeur égale à celle de l'alvéole 141, soit égale à sept fois la profon­deur des portions de rainure 117. L'alvéole 125 a une pro­fondeur égale à six fois celle des portions de rainure 117 et l'alvéole 136 une profondeur comprise entre cinq et six fois celle des portions de rainure 117. Des lignes en poin­tillés mettent en évidence les différences de profondeur des alvéoles.On the left part of FIG. 3, and from the edge 5 of the mattress, extends a ramp 15, then the cells 124 and 125 of the zigzag groove 120, and finally in another cutting plane the cell 136 of the zigzag groove 130. The groove portions 117 all have the same depth whatever the zigzag groove considered. The cell 124 adjacent to the edge 5 has a depth equal to that of the cell 141, or equal to seven times the depth of the groove portions 117. The cell 125 has a depth equal to six times that of the groove portions 117 and the cell 136 a depth of between five and six times that of the groove portions 117. Dashed lines highlight the differences in depth of the cells.

Plusieurs enseignements peuvent être tirés de l'observation de la figure 3. Tout d'abord, d'après la partie droite de la figure, les alvéoles telles que 141, les plus éloignées de l'axe longitudinal 1 du matelas et situées au voisinage du bord 5 du matelas présentent une profondeur supérieure à celle des autres alvéoles telles que 142, 143 situées plus prés de l'axe longitudinal 1. On notera cependant que la profondeur des alvéoles 142 et 143 est la même, bien qu'elles soient à une distance différente de l'axe longitudinal 1.Several lessons can be drawn from the observation of Figure 3. First, from the right side of the figure, the cells such as 141, the most distant from the longitudinal axis 1 of the mattress and located in the vicinity of the edge 5 of the mattress have a depth greater than that of the other cells such as 142, 143 located closer to the longitudinal axis 1. It will however be noted that the depth of the cells 142 and 143 is the same, although they are at a different distance from the longitudinal axis 1.

Ensuite, les alvéoles telles que 143,136,125 qui ne sont pas les plus éloignées de l'axe longitudinal 1 présentent cependant des profondeurs croissantes dans la mesure où elles sont situées à des distances croissantes par rapport à l'axe transversal 2 du matelas.Then, the cells such as 143,136,125 which are not the most distant from the longitudinal axis 1 however have increasing depths insofar as they are located at increasing distances from the transverse axis 2 of the mattress.

Cette règle ne vaut pas pour les alvéoles telles que 124 et 141 les plus éloignées de l'axe longitu­dinal 1, qui présentent la même profondeur, bien que leur distance à l'axe transversal 2 ne soit pas la même. En effet toutes les alvéoles périphériques telles que 116,115,114, 124,134,144,22,32,42, et 92 présentent la même profondeur, à savoir la profondeur la plus importante.This rule does not apply to the cells such as 124 and 141 furthest from the longitudinal axis 1, which have the same depth, although their distance from the transverse axis 2 is not the same. Indeed all the peripheral cells such as 116,115,114, 124,134,144,22,32,42, and 92 have the same depth, namely the most important depth.

Les différences de profondeur des alvéoles ont été indiquées sur la figure 1 par un noircissement des alvéoles, d'autant plus intense qu'elles sont profondes.The differences in depth of the alveoli were indicated in FIG. 1 by a darkening of the alveoli, the more intense the deeper they are.

La figure 2 illustre l'évolution de la pro­fondeur des alvéoles des différentes rainures en zigzag, le long de l'axe longitudinal 1 du matelas. Cette figure est symétrique par rapport au plan transversal médian 8 du ma­telas. Sur la partie gauche de la figure 2, les alvéoles 146, 136, 126 et 116 se succèdent dans des plans de coupe diffé­rents ; elles appartiennent respectivement aux rainures en zigzag 140, 130, 120 et 110.Figure 2 illustrates the evolution of the depth of the cells of the different zigzag grooves, along the longitudinal axis 1 of the mattress. This figure is symmetrical with respect to the median transverse plane 8 of the mattress. On the left-hand side of FIG. 2, the cells 146, 136, 126 and 116 follow one another in different section planes; they belong respectively to the zigzag grooves 140, 130, 120 and 110.

Comme indiqué précédemment à propos de la figure 3, puisque ces alvéoles sont situées à des distances croissantes de l'axe transversal 2 - ici le plan transversal 8 - et qu'il ne s'agit pas d'alvéoles périphériques, à l'excep­tion de l'alvéole 116, leur profondeur est croissante. Les profondeurs des alvéoles 146, 136, 126 et 116 sont respecti­vement égales à un peu moins de cinq fois, un peu plus de cinq fois, six fois et sept fois la profondeur des portions de rainure 117.As indicated above with reference to FIG. 3, since these cells are located at increasing distances from the transverse axis 2 - here the transverse plane 8 - and since they are not peripheral cells, with the exception of cell 116, their depth is increasing. The depths of the cells 146, 136, 126 and 116 are respectively a little less than five times, a little more than five times, six times and seven times the depth of the groove portions 117.

En ce qui concerne les dimensions des cavitées prévues sur la face inférieure du matelas, la largeur des différentes rainures varie de préférence entre 10 et 60 mm, dans le cas présent entre 20 et 40 mm, le matelas présentant une largeur de 900 mm. Les alvéoles présentent une longueur comprise de préférence entre 80 et 160 mm, dans le cas présent une longueur de 120 mm, et une largeur de préférence comprise entre 30 et 90 mm, dans le cas présent une largeur de 60 mm.As regards the dimensions of the cavities provided on the underside of the mattress, the width of the different grooves preferably varies between 10 and 60 mm, in the present case between 20 and 40 mm, the mattress having a width of 900 mm. The cells preferably have a length between 80 and 160 mm, in the present case a length of 120 mm, and a width preferably between 30 and 90 mm, in the present case a width of 60 mm.

La profondeur des rainures est comprise de préférence entre 5 et 40 mm pour une épaisseur de matelas égale à 130 mm ; dans le cas présent cette profondeur varie entre 15 et 30 mm.The depth of the grooves is preferably between 5 and 40 mm for a mattress thickness equal to 130 mm; in this case this depth varies between 15 and 30 mm.

La profondeur des alvéoles sera de préférence comprise entre 50 et 110 mm ; dans le cas présent, elle varie entre 70 et 100 mm.The depth of the cells will preferably be between 50 and 110 mm; in the present case, it varies between 70 and 100 mm.

D'une manière plus générale, les dimensions des cavités seront choisies en fonction de celles du matelas et du poids qu'il est destiné à supporter. Dans l'exemple décrit précédemment, les dimensions et la forme des cavités varient sur l'étendue du matelas pour tenir compte des efforts que seront appliqués localement, et qui eux-mêmes varient sur l'étendue du matelas. En effet, lorsqu'une per­sonne est étendue sur le matelas, elle sollicite fortement le matelas dans sa région centrale supportant le poids du tronc et des fesses, tandis qu'elle sollicite nettement moins le matelas dans les régions d'extrémité qui supportent seulement le poids de la tête ou des jambes.More generally, the dimensions of the cavities will be chosen according to those of the mattress and the weight it is intended to support. In the example described above, the dimensions and the shape of the cavities vary over the extent of the mattress to take account of the forces which will be applied locally, and which themselves vary on the extent of the mattress. In fact, when a person is stretched out on the mattress, he places a heavy load on the mattress in its central region supporting the weight of the trunk and buttocks, while he places much less stress on the mattress in the end regions which only support the weight of head or legs.

La profondeur des cavités est un paramètre déterminant puisqu'il fixe de façon correspondante l'épaisseur de matelas au droit de ces cavités. Or, une zone du matelas sera d'autant plus apte à supporter un poids que son épaisseur sera importante et autorisera ainsi une compression importante du matelas. Sur les figures 2 et 3, les variations de profon­deur des cavités - c'est-à-dire les variations d'épaisseur du matelas - sont liées à la répartition du poids du corps sur le matelas.The depth of the cavities is a determining parameter since it fixes the thickness of the mattress correspondingly to the right of these cavities. However, an area of the mattress will be all the more capable of supporting a weight as its thickness will be significant and will thus allow significant compression of the mattress. In FIGS. 2 and 3, the variations in depth of the cavities - that is to say the variations in thickness of the mattress - are linked to the distribution of the weight of the body on the mattress.

C'est pourquoi la région centrale ne présente que des cavités - dans le cas présent des rainures - dont la profondeur est faible devant l'épaisseur du matelas, tandis qu'à la périphérie du matelas les proportions sont inversées.This is why the central region only has cavities - in this case grooves - whose depth is small compared to the thickness of the mattress, while at the periphery of the mattress the proportions are reversed.

Les dimensions et formes des cavités tiennent compte également des exigences de moulage du matelas. Ainsi, la profondeur des portions de rainure 117 (figure 3) a été choisie faible pour favoriser l'écoulement de la matière lors du moulage. En effet, le moule présentera plusieurs bosses correspondant aux différentes alvéoles, qui s'opposeront, par leur hauteur, à la répartition de la matière, mais il présentera aussi plusieurs nervures de faible hauteur cor­respondant aux différentes portions de rainure, qui ne s'op­poseront que très faiblement à la répartition de la matière. En résumé, une cavité profonde dans le matelas ne pourra s'étendre de façon continue sur une grande longueur. En revanche les rainures en forme d'arc 10 à 80 (figures 1 et 2) peuvent s'étendre de façon continue, puisqu'elle présentent une faible profondeur.The dimensions and shapes of the cavities also take into account the molding requirements of the mattress. Thus, the depth of the groove portions 117 (FIG. 3) was chosen to be small to promote the flow of the material during molding. Indeed, the mold will have several bumps corresponding to the different cells, which will oppose, by their height, the distribution of the material, but it will also have several ribs of low height corresponding to the different groove portions, which will not oppose only very slightly to the distribution of matter. In summary, a deep cavity in the mattress cannot extend continuously over a great length. On the other hand, the arcuate grooves 10 to 80 (Figures 1 and 2) can extend continuously, since they have a shallow depth.

Bien que de telles précautions soient prises, toute matière ne conviendra pas pour le moulage du mate­las. On choisira de préférence une matière sujette à une expansion naturelle en volume. Ainsi le polyuréthanne remplit, au début de moulage, seulement le fond du moule. Au cours du moulage, et notamment par chauffage du produit, le polyuréthanne s'expanse de façon importante jusqu'à remplir tout le volume intérieur du moule, favorisant ainsi sa répartition malgré la présence des bosses et nervures du moule. De façon plus générale, les mousses plastiques expansibles sont les matériaux préférés.Although such precautions are taken, not all material will be suitable for molding the mattress. We will preferably choose a material subject to a natural expansion in volume. Thus the polyurethane fills, at the start of molding, only the bottom of the mold. During molding, and in particular by heating the product, the polyurethane expands significantly until it fills the entire interior volume of the mold, thus promoting its distribution despite the presence of the bumps and ribs of the mold. More generally, expandable plastic foams are the preferred materials.

Les dimensions et formes des cavités répondent encore à d'autres soucis. Tout d'abord, il faut s'assurer que les cavités ne seront pas bouchées par le sommier. Les sommiers envisageables sont ceux comportant un grillage, une toile tendue, ou encore des lattes rigides disposées parallè­lement et espacées les unes des autres, ou d'autres sommiers ne présentent pas une surface continue et imperméable qui boucherait les cavités.The dimensions and shapes of the cavities also respond to other concerns. First of all, make sure that the cavities are not blocked by the box spring. The bed bases that can be envisaged are those comprising a mesh, a stretched fabric, or even rigid slats arranged in parallel and spaced from one another, or other bed bases do not have a continuous and impermeable surface which would plug the cavities.

Le matelas représenté sur les figures a été conçu en particulier pour un sommier à lattes. Sur la figure 1, trois lattes 201 à 203 ont été représentées. Les rainures en forme d'arc telles que 50 et celles en zigzag telles que 180 s'étendent chacune, selon la direction de l'axe longitu­dinal 1 du matelas, sur une distance déterminée en fonction des dimensions standard de lattes du commerce, comprises dans un intervalle de dimensions connu, et en fonction de l'espace-­de ces lattes.The mattress shown in the figures was designed in particular for a slatted base. In Figure 1, three slats 201 to 203 have been shown. The arc-shaped grooves such as 50 and the zigzag grooves such as 180 each extend, in the direction of the longitudinal axis 1 of the mattress, over a distance determined according to the standard dimensions of commercial slats, included in a known range of dimensions, and depending on the space of these slats.

Sur la figure 1, la rainure 50 en forme d'arc présente plusieurs zones débouchant à l'air libre. De même, chaque alvéole de la rainure en zigzag 180 présente au moins une zone débouchant à l'air libre.In FIG. 1, the arc-shaped groove 50 has several zones opening into the open air. Likewise, each cell of the zigzag groove 180 has at least one zone opening into the open air.

Par ailleurs, l'orientation différente de deux alvéoles adjacentes 181, 182 d'une même rainure en zigzag 180 permet de renforcer la rigidité du matelas, plus précisément d'éviter le flambage de la paroi latérale 210 du matelas (figures 2 et 3). La symétrie de l'ensemble du matelas par rapport à ses axes longitudinal 1 et transversal 2 contri­bue de la même façon à renforcer la rigidité du matelas.Furthermore, the different orientation of two adjacent cells 181, 182 of the same zigzag groove 180 makes it possible to reinforce the rigidity of the mattress, more precisely to avoid buckling of the side wall 210 of the mattress (Figures 2 and 3) . The symmetry of the entire mattress with respect to its longitudinal 1 and transverse 2 axes likewise contributes to strengthening the rigidity of the mattress.

Comme représenté sur les figures 4 et 5, la face supérieure 4 du matelas porte elle aussi des cavités. Il s'agit de rainures parallèles 300 qui s'étendent en tra­vers du matelas de façon espacée. Chaque rainure 300 pré­sente une largeur et une profondeur uniformes ; elle prend fin à une certaine distance du bord 6 de la face supérieure 4. Chaque rainure 300 a, en section, la forme d'une V.As shown in Figures 4 and 5, the upper face 4 of the mattress also carries cavities. These are parallel grooves 300 which extend across the mat spaced apart. Each groove 300 has a uniform width and depth; it ends at a certain distance from the edge 6 of the upper face 4. Each groove 300 has, in section, the shape of a V.

La présence de telles rainures ne doit natu­rellement pas être ressentie par l'utilisateur. Aussi, la largeur et la profondeur des rainures sont très faibles. La largeur est comprise de préférence entre 8 et 16 mm, et égale dans le cas présent à 12 mm. La profondeur est comprise de préférence entre 3 et 9 mm, et égale dans le cas présent à 6 mm.The presence of such grooves should naturally not be felt by the user. Also, the width and depth of the grooves are very small. The width is preferably between 8 and 16 mm, and in this case equal to 12 mm. The depth is preferably between 3 and 9 mm, and in this case equal to 6 mm.

On notera que, pour la simplification des dessins, les rainures de la face supérieure 4 du matelas et celles de la face inférieure 3 ne sont pas représentées simultanément sur une même figure.It will be noted that, for the simplification of the drawings, the grooves of the upper face 4 of the mattress and those of the lower face 3 are not shown simultaneously in the same figure.

Le matelas double, dont on a représenté la face inférieure sur les figures 6 et 7, est destiné à recevoir deux personnes. Il présente un axe longitudinal 401 et un axe transversal 402. De part et d'autre de l'axe longitudinal 401 sont prévus deux motifs identiques de cavités 500, 600, analogues au motif de la figure 1.The double mattress, the underside of which is shown in FIGS. 6 and 7, is intended to receive two people. It has a longitudinal axis 401 and a transverse axis 402. On either side of the longitudinal axis 401 are provided two identical patterns of cavities 500, 600, similar to the pattern in FIG. 1.

Chaque motif comprend donc respectivement huit rainures 510, 610 en forme d'arc dans une région centrale, et quatre rainures en zigzag 520, 620 dans deux régions d'extrémité.Each pattern therefore comprises respectively eight grooves 510, 610 in the form of an arc in a central region, and four zigzag grooves 520, 620 in two end regions.

La liaison entre les deux motifs 500 et 600 est illustrée en figure 7. L'alvéole 521 de la rainure en zigzag 520 rejoint le plan longitudinal médian 403 du mate­las, par une rampe 522. De même, l'alvéole 621 de la rainure en zigzag 620 rejoint ce plan par une rampe 622. Il existe donc une zone médiane 404 du matelas, qui s'étend sur toute la longueur de celui-ci, et dans laquelle la profondeur des rainures est nulle ou quasi nulle. Cette zone médiane 404 compacte produit un isolement entre les deux parties 500, 600 du matelas double, en ce sens que les mouvements d'une per­sonne sur la partie 500 seront peu ressentis par la personne se trouvant sur la partie 600. Le zone médiane 404 contribue aussi à s'opposer au flambage de la paroi latérale du ma­telas double.The connection between the two patterns 500 and 600 is illustrated in FIG. 7. The cell 521 of the zigzag groove 520 joins the median longitudinal plane 403 of the mattress, by a ramp 522. Similarly, the cell 621 of the groove in zigzag 620 joins this plane by a ramp 622. There is therefore a median zone 404 of the mattress, which extends over the entire length thereof, and in which the depth of the grooves is zero or almost zero. This compact median zone 404 produces an isolation between the two parts 500, 600 of the double mattress, in the sense that the movements of a person on the part 500 will be little felt by the person being on the part 600. The median zone 404 contributes also to oppose the buckling of the side wall of the double mattress.

La surface supérieure du matelas double porte deux motifs analogues à celui de la figure 4.The upper surface of the double mattress has two patterns similar to that of FIG. 4.

De façon remarquable, les cavités du matelas selon l'invention n'affaiblissent pas celui-ci, mais au contraire le renforcent. En effet, la surface extérieure du matelas est augmentée par chacune des cavités. Or cette surface extérieure porte une "peau" du moulage dont la rigi­dité est supérieure au matériau constituant le coeur du matelas.Remarkably, the cavities of the mattress according to the invention do not weaken it, but on the contrary strengthen it. Indeed, the external surface of the mattress is increased by each of the cavities. However, this outer surface carries a "skin" of the molding whose rigidity is greater than the material constituting the core of the mattress.

On notera que l'efficacité des cavités à lutter contre l'humidité est d'autant plus importante que leur volume est grand.It will be noted that the effectiveness of the cavities in combating humidity is all the more important the greater their volume.

Par ailleurs, le fait que les alvéoles d'une même rainure en zigzag soient reliées entre elles grâce aux portions de rainure 117, comme cela apparait le mieux sur la figure 3, favorise un brassage de l'air contenu dans les différentes alvéoles : les portions des rainures 117 contribuent donc de façon appréciable à l'évacuation de l'humidité. De même, les rampes 13, 15, qui relient les alvéoles 124, 141 avec l'extérieur, favorisent l'expulsion de l'air contenu dans la rainure lorsque le matelas est comprimé.Furthermore, the fact that the cells of the same zigzag groove are connected to each other by virtue of the groove portions 117, as it best appears in FIG. 3, promotes mixing of the air contained in the different cells: the portions of the grooves 117 therefore contribute appreciably to the evacuation of moisture. Similarly, the ramps 13, 15, which connect the cells 124, 141 with the outside, favor the expulsion of the air contained in the groove when the mattress is compressed.

Il y a lieu de remarquer que le matelas re­présenté sur les figures réalise un compromis avantageux. En ce qui concerne le comportement mécanique de la mousse et en faisant abstraction de la présence d'humidité, c'est lorsque la mousse est la plus massive qu'elle possède le meilleur rendement et même que ses caractéristiques méca­niques se conservent le mieux dans le temps.It should be noted that the mattress shown in the figures achieves an advantageous compromise. Regarding the mechanical behavior of the foam and ignoring the presence of moisture, it is when the foam is the most massive that it has the best performance and even that its mechanical characteristics are best preserved in the time.

En revanche, considérant maintenant seulement le problème relatif à la présence d'humidité, les caracté­ristiques mécaniques de la mousse seront d'autant moins affectées dans le temps par l'humidité que la mousse possè­dera de cavités de grandes dimensions.On the other hand, now considering only the problem relating to the presence of moisture, the mechanical characteristics of the foam will be all the less affected in time by humidity as the foam will have large cavities.

La progressivité de la profondeur des cavités du matelas selon l'invention, telle qu'elle apparaît le mieux en figure 2, illustre bien le compromis réalisé.The progressiveness of the depth of the cavities of the mattress according to the invention, as it best appears in FIG. 2, illustrates well the compromise achieved.

De façon très avantageuse, et en complément des cavités, le matériau constituant le matelas pourra présen­ter une densité et une dureté - ou portance - variables le long du matelas.Very advantageously, and in addition to the cavities, the material constituting the mattress may have a density and a hardness - or lift - variable along the mattress.

Plus précisément, la région centrale dépourvue d'alvéoles - ou coeur du matelas - présentera une densité plus forte que les régions périphériques pourvues d'alvéoles, afin qu'elle soit encore plus massive.More specifically, the central region devoid of cells - or core of the mattress - will have a higher density than the peripheral regions provided with cells, so that it is even more massive.

De plus, cette région centrale présentera une dureté plus faible que les régions périphériques : il est en effet souhaitable que la sensation de souplesse du matelas soit ressentie surtout dans la région centrale pour s'adapter au corps.In addition, this central region will have a lower hardness than the peripheral regions: it is indeed desirable that the feeling of suppleness of the mattress is felt especially in the central region to adapt to the body.

Dans le cas présent, une densité de 48 kg/m³ et une dureté selon la norme NF.T. 56110 de 35 g/cm² ont été choisies pour la région centrale, tandis qu'une densité de 40 kg/m³ et une dureté de 40 g/cm² ont été choisies pour les régions périphériques.In the present case, a density of 48 kg / m³ and a hardness according to standard NF.T. 56110 of 35 g / cm² were chosen for the central region, while a density of 40 kg / m³ and a hardness of 40 g / cm² were chosen for the peripheral regions.

De façon plus générale, la densité pourra varier entre 35 et 70 kg/m³, et la dureté entre 20 et 80 g/cm².More generally, the density may vary between 35 and 70 kg / m³, and the hardness between 20 and 80 g / cm².

L'ensemble des caractéristiques de la présente invention s'appliquent particulièrement bien aux matelas équipant un lit, et présentant les dimensions standard de la literie (largeur comprise entre 0,7 m et 1,60 m, et longueur comprise entre 1,90 m et 2 m).All the characteristics of the present invention apply particularly well to mattresses fitted to a bed, and having the standard dimensions of the bedding (width between 0.7 m and 1.60 m, and length between 1.90 m and 2 m).

Claims (9)

1.- Matelas comprenant une couche en un matériau souple présentant une face inférieure (3) par laquelle le matelas peut prendre appui sur un sommier, et une face supérieure (4) destinée à recevoir le corps d'une personne, chaque face étant délimitée par un bord (5, 6), la face inférieure (3) présentant une pluralité d'alvéoles (111 à 116) disposées à la périphérie du matelas et s'étendant sur une majeure partie de l'épaisseur du matelas, caractérisé en ce que ledit matériau est une mousse plas­tique expansible, la face inférieure (3) présentant plu­sieurs rainures (110, 120), s'étendant sur une faible partie de l'épaisseur du matelas, lesdites alvéoles étant disposées au droit desdites rainures de façon à augmenter localement la profondeur des rainures.1.- Mattress comprising a layer of flexible material having a lower face (3) by which the mattress can bear on a bed base, and an upper face (4) intended to receive the body of a person, each face being delimited by an edge (5, 6), the lower face (3) having a plurality of cells (111 to 116) arranged on the periphery of the mattress and extending over a major part of the thickness of the mattress, characterized in that that said material is an expandable plastic foam, the lower face (3) having several grooves (110, 120), extending over a small part of the thickness of the mattress, said cells being arranged in line with said grooves so as to increase locally the depth of the grooves. 2.- Matelas selon la revendication 1, dans lequel chaque rainure (110) comporte deux extrémités (13, 14) par lesquelles elle débouche sur le bord (5) de la face infé­rieure (3) du matelas.2.- mattress according to claim 1, wherein each groove (110) has two ends (13, 14) by which it opens onto the edge (5) of the underside (3) of the mattress. 3.- Matelas selon la revendication 1 ou la revendication 2, qui présente une forme rectangulaire, les rainures (10, 110), s'étendant transversalement.3.- Mattress according to claim 1 or claim 2, which has a rectangular shape, the grooves (10, 110), extending transversely. 4.- Matelas selon l'une quelconque des revendica­tions précédentes, destiné à équiper un sommier comprenant une pluralité de lattes (201 à 203) espacées les unes des autres, dans lequel les dimensions et la disposition des rainures (50) et des alvéoles (181 à 186) sont choisies de façon que, lorsque le matelas repose sur le sommier, celles-­ci présentent chacune une zone débouchant à l'air libre.4.- Mattress according to any one of the preceding claims, intended to equip a bed base comprising a plurality of slats (201 to 203) spaced from each other, in which the dimensions and the arrangement of the grooves (50) and the cells ( 181 to 186) are chosen so that, when the mattress rests on the bed base, these each have an area opening into the open air. 5.- Matelas selon la revendication 4, dans lequel les rainures (110, 120) des régions périphériques s'éten­dent en zigzag et celles (10, 20) de la région centrale s'étendant selon un arc.5.- Mattress according to claim 4, wherein the grooves (110, 120) of the peripheral regions extend in a zigzag and those (10, 20) of the central region extending in an arc. 6.- Matelas selon l'une quelconque des revendi­cations précédentes, dans lequel la profondeur des rainures (10, 110) est sensiblement constante tandis que celle des alvéoles (116, 126, 136, 146) est d'autant plus importante que ces alvéoles sont éloignées des axes médians longitu­dinal et transversal du matelas.6.- Mattress according to any one of the preceding claims, in which the depth of the grooves (10, 110) is substantially constant while that of the cells (116, 126, 136, 146) is all the more important as these cells are distant from the longitudinal and transverse median axes of the mattress. 7.- Matelas selon l'une quelconque des revendications précédentes et destiné à recevoir deux per­sonnes côte à côte, caractérisé en ce qu'il présente une zone médiane (404) dans laquelle la profondeur des rainures et réduite.7.- Mattress according to any one of the preceding claims and intended to receive two people side by side, characterized in that it has a median zone (404) in which the depth of the grooves and reduced. 8.- Matelas selon l'une quelconque des revendications précédentes, caractérisé en ce que ladite face supérieure (4) présente une pluralité de rainures (300) dont la profondeur est sensiblement inférieure à celle des rainures de la face inférieure.8.- Mattress according to any one of the preceding claims, characterized in that said upper face (4) has a plurality of grooves (300) whose depth is substantially less than that of the grooves on the lower face. 9.- Matelas selon l'une quelconque des revendications précédentes, caractérisé en ce que le maté­riau constituant le matelas présente une densité plus forte mais une dureté plus faible dans la région centrale du matelas, que dans ses régions périphériques9.- Mattress according to any one of the preceding claims, characterized in that the material constituting the mattress has a higher density but a lower hardness in the central region of the mattress, than in its peripheral regions
EP87402563A 1986-11-13 1987-11-13 Mattress with ventilating cavities Expired - Lifetime EP0267855B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87402563T ATE93371T1 (en) 1986-11-13 1987-11-13 MATTRESS WITH VENTILATION OPENINGS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8615732A FR2606619B1 (en) 1986-11-13 1986-11-13 MATTRESS PROVIDED WITH VENTILATION CAVITIES
FR8615732 1986-11-13

Publications (3)

Publication Number Publication Date
EP0267855A2 true EP0267855A2 (en) 1988-05-18
EP0267855A3 EP0267855A3 (en) 1989-03-15
EP0267855B1 EP0267855B1 (en) 1993-08-25

Family

ID=9340741

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87402563A Expired - Lifetime EP0267855B1 (en) 1986-11-13 1987-11-13 Mattress with ventilating cavities

Country Status (12)

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US (1) US4796316A (en)
EP (1) EP0267855B1 (en)
JP (1) JPS63220811A (en)
AR (1) AR244057A1 (en)
AT (1) ATE93371T1 (en)
AU (1) AU589878B2 (en)
BR (1) BR8706118A (en)
CA (1) CA1315025C (en)
DE (2) DE267855T1 (en)
ES (1) ES2017907T3 (en)
FR (1) FR2606619B1 (en)
GR (1) GR900300178T1 (en)

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Also Published As

Publication number Publication date
FR2606619B1 (en) 1990-04-20
EP0267855A3 (en) 1989-03-15
US4796316A (en) 1989-01-10
AR244057A1 (en) 1993-10-29
EP0267855B1 (en) 1993-08-25
AU8112087A (en) 1988-05-19
GR900300178T1 (en) 1991-09-27
AU589878B2 (en) 1989-10-19
ATE93371T1 (en) 1993-09-15
CA1315025C (en) 1993-03-23
DE3787149T2 (en) 1994-01-05
ES2017907A4 (en) 1991-03-16
FR2606619A1 (en) 1988-05-20
ES2017907T3 (en) 1993-12-16
BR8706118A (en) 1988-06-21
DE267855T1 (en) 1991-02-28
JPS63220811A (en) 1988-09-14
DE3787149D1 (en) 1993-09-30

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