WO2010092434A1 - Process for the production of layered paddings with cavities and product obtained therefrom - Google Patents

Process for the production of layered paddings with cavities and product obtained therefrom Download PDF

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Publication number
WO2010092434A1
WO2010092434A1 PCT/IB2009/050556 IB2009050556W WO2010092434A1 WO 2010092434 A1 WO2010092434 A1 WO 2010092434A1 IB 2009050556 W IB2009050556 W IB 2009050556W WO 2010092434 A1 WO2010092434 A1 WO 2010092434A1
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WO
WIPO (PCT)
Prior art keywords
cavities
padding
grooves
layer
mould element
Prior art date
Application number
PCT/IB2009/050556
Other languages
French (fr)
Inventor
Renzo Tergolin
Original Assignee
Expan Trading Srl
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 Expan Trading Srl filed Critical Expan Trading Srl
Priority to PCT/IB2009/050556 priority Critical patent/WO2010092434A1/en
Publication of WO2010092434A1 publication Critical patent/WO2010092434A1/en

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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
    • A47C27/148—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays of different resilience
    • 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
    • A47C27/144—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays with projections, depressions or cavities inside 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
    • 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
    • A47C27/15—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays consisting of two or more layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/28—Splitting layers from work; Mutually separating layers by cutting
    • B26D3/281—Splitting layers from work; Mutually separating layers by cutting the work being simultaneously deformed by the application of pressure to obtain profiled workpieces

Definitions

  • the present patent relates to the padding of mattresses, seats, backrests and paddings in general and in particular concerns paddings with grooves or cavities with at least two layers, also with different characteristics.
  • mattresses, seats and backrests of armchairs and chairs with inner padding made of foamed material for example latex, polyurethane, polyols or other, are increasingly widespread and commonly used.
  • foamed material for example latex, polyurethane, polyols or other
  • foamed material for example latex, polyurethane, polyols or other
  • foamed material for example latex, polyurethane, polyols or other
  • To aid breathability and obtain paddings with differentiated carrying capacity grooves, cavities, incisions, holes and recesses are made in the body of the padding or different foamed materials are used.
  • the use of different foamed materials has the advantage that the carrying capacity, the rigidity and other parameters of each area of the mattress can be pre-determined in the production phase.
  • Said paddings are normally obtained by coupling two layers of different density or foaming and sintering the material of one or more first parts inside specific moulds, and subsequently positioning said completely formed first parts inside a second mould in which the second material is foamed and sintered. Since the two materials are similar or in any case compatible, when the second material is foamed and sintered, it attaches to and merges with the surface of the first materials, thus joining the two parts.
  • the subject of the present invention is a new process for the production of paddings with at least two layers provided with grooves and/or cavities and the product obtained.
  • One object of the new process is to obtain paddings with grooves and/or cavities consisting of at least two layers, for example of different densities and/or different colour, in one single action and with limited costs.
  • a further object of the new process is to obtain paddings having at least two layers with parts of foamed material of even very small dimensions.
  • a further object of the new process is to obtain paddings with grooves and/or cavities having at least two different layers by means of a reduced number of operations.
  • the new process ensures the coupling, by means of adhesive substances or contact sintering/foaming, of a first layer of foamed material with a second layer, or several overlapped second layers, of foamed material also with different characteristics, typically different density and/or different colour, to form one single body subsequently called padding.
  • said padding is compressed between a mould element, bearing grooves and/or cavities identical to the grooves and cavities to be formed on the padding, and a second counter or pressure element, smooth or with protruding parts generally complementary to the grooves and cavities of said mould element.
  • said mould element consists of a surface wide enough to support the padding and provided, on the side of contact with said padding, with grooves and cavities identical to those to be obtained on the padding, while said pressure element consists of a surface, parallel to said mould element, with the side facing towards said mould element being continuous or having protruding parts complementary to said grooves and cavities present on the mould element.
  • the padding in which the grooves and/or cavities are to be made is positioned between the mould element and the pressure element which are brought together and pressed, thus compressing the layers of the padding between said mould element and said pressure element.
  • Said first layer of foamed material not involved, or involved to a limited extent in the formation of said grooves or cavities, faces towards the pressure element while the second layer of foamed material or the second layers of foamed material with different density and/or colour face towards the mould element.
  • the padding When the padding is compressed between the mould element and the pressure element, the padding enters the grooves or cavities of the mould element. After said compression a sharp blade runs over the surface of the mould element facing towards the pressure element.
  • Said blade leaves the part of the padding outside said grooves and cavities of the mould element substantially unchanged, while it cuts the part of said padding which has penetrated said grooves or cavities of said mould element.
  • a greater or lesser portion of foamed material of the padding penetrates said grooves and cavities and is cut by said blade. It is possible for said blade to cut the padding for a thickness lesser, equal to or greater than the thickness of the second layer or second layers and if necessary also part of said first layer of foamed material.
  • the opening of said mould element and counter or pressure element releases the padding, which re-acquires its original compactness, containing the grooves and/or cavities resulting from the material cut by the blade.
  • said mould element consists of a roller, the surface of which is provided with the grooves and/or cavities to be obtained in the padding, while said counter or pressure element consists of a second roller parallel to said first mould element roller and having a smooth surface or surface with protruding parts complementary to the grooves or cavities of said mould element roller.
  • Said pressure element roller can have a corrugated surface to facilitate feed- in of the padding.
  • the padding is passed between said two adjacent rollers, pressed against each other and rotating in the same direction, thus feeding forward the padding inserted and compressed between them with the first layer facing towards the pressure element roller.
  • the blade is fixed, positioned preferably to adhere to the surface of the mould element roller and in a position, on the circumference of said mould element roller, of least distance between said mould element roller and said pressure element roller or at the point of greatest compression of the padding inserted and compressed between said rollers.
  • the padding thus obtained has a first layer, substantially continuous, on which at least one second layer of foamed material is applied, having grooves or cavities less deep than said second layer.
  • the padding thus obtained comprises a substantially continuous layer on which a second layer or second layers of foamed material are applied having grooves or cavities. Said grooves or cavities can be less deep than said second layer or less than the thickness of said second layers.
  • Said grooves or cavities can be as deep as the thickness of said second layer or the thickness of said second layers. Said grooves or cavities can be deeper than the thickness of said second layer, or the thickness of said second layers, also involving part of said first layer.
  • One, some or each of all said second layers of foamed material can consist of foamed material with equal or different density and/or equal or different colours and/or equal or different characteristics with respect to the first layer.
  • each of said second layers can consist of portions or bands of foamed material of the same thickness but with different characteristics, positioned laterally side by side to constitute a layer of constant thickness having zones or areas with equal or different densities and/or equal or different colours and/or equal or different characteristics.
  • Said first layer of foamed material can consist of portions or bands of foamed material of the same thickness but with different characteristics, joined together laterally to constitute a layer of constant thickness having zones or areas with equal or different densities and/or equal or different colours and/or equal or different characteristics.
  • a further layer of foamed material can be fixed on the side of the padding not involved in formation of the grooves.
  • the characteristics of the new process for the production of paddings with grooves and/or cavities with two or more layers of different density and/or colour will be better clarified by the following description with reference to the drawings attached by way of non-limiting example.
  • Figures Ia, Ib and Ic show three of the main stages in the new process according to the first preferred solution.
  • the padding (S) consists of a first layer (Sl) on which a second layer (S2) of foamed material with different density and/or different colour is applied.
  • a surface (Al) constitutes the mould element which, on the side in contact with the padding (S), is provided with grooves and/or cavities (As) identical to those to be obtained on the padding (S);
  • a second surface (A2) constitutes the pressure element and is parallel to said mould element (Al).
  • the padding (S) is positioned between the mould element (Al) and the pressure element (A2), as shown schematically in figure 1.
  • said first layer (Sl) of the padding (S) faces towards the pressure element (A2) while the second layer (S2) of foamed material with different characteristics faces towards the mould element (Al).
  • the mould elements (Al) and the pressure element (A2) are brought together, as shown in figure 2, thus compressing the padding (S) between the two elements.
  • the padding (S) is compressed less and penetrates inside the grooves and cavities (As) of the mould element (Al).
  • Said blade (L) leaves the part of the padding (S) outside said grooves and cavities (As) of the mould element (Al) substantially unchanged while it cuts the part of said padding (S) which has penetrated into said grooves or cavities (As) of said mould element (Al).
  • Said blade (L) cuts the padding (S) for a thickness less than, equal to or greater than the thickness of the second layer (S2) and possibly also part of the thickness of said first layer (Sl).
  • the roller (Rl) is provided with said grooves and/or cavities (Rs) on its surface.
  • the padding (S) is passed between said two nearby rollers (Rl, R2).
  • the blade (L) is fixed, positioned between said two rollers (Rl, R2) and preferably adheres to the surface of the roller (Rl) that makes up the mould element, i.e. at the point of greatest compression of the padding (S) inserted and compressed between said rollers (Rl, R2).
  • Figures 3a and 3b show two sections of two examples of finished padding
  • the padding (S) produced by one of the processes described.
  • the padding (S) has a substantially continuous first layer (Sl) joined to a second layer (S2) provided with grooves and/or cavities (Sx).
  • the new process has considerable advantages. It requires only a few simple operations: joining of the various layers (Sl, S2) which make up the padding (S), compression of them between the mould element (Al, Rl) and the pressure element (A2, R2) and cutting with the blade (L).
  • the new process uses simple tools or tools requiring a modest financial investment.
  • the padding (S) obtained with the new process comprises a first layer (Sl) of substantially continuous foamed material and a second layer

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Mattresses And Other Support Structures For Chairs And Beds (AREA)

Abstract

A new process is described for the production of paddings (S) having at least two layers (S1, S2) of foamed material, formed of one first layer of foamed material (S1) to which at least one second layer of foamed material (S2) is joined, wherein said first (S1) and second (S2) coupled layers are compressed between a mould element (A1, R1), having grooves and/or cavities (As, Rs) corresponding to the grooves or cavities (Sx) to be formed on the padding (S), and a second counter or pressure element (A2, R2); a blade (L) is positioned or slides between said mould element (Al, Rl) and pressure element (A2, R2) and, adhering to the surface of said mould element (A1, R1) facing towards said pressure element (A2, R2), cuts and separates the parts of one or more layers (S1, S2) of the padding (S), which are pushed into said grooves or cavities (As, Rs), from the rest of the layers.

Description

PROCESS FOR THE PRODUCTION OF LAYERED PADDINGS WITH CAVITIES AND PRODUCT OBTAINED THEREFROM
The present patent relates to the padding of mattresses, seats, backrests and paddings in general and in particular concerns paddings with grooves or cavities with at least two layers, also with different characteristics. Currently mattresses, seats and backrests of armchairs and chairs with inner padding made of foamed material, for example latex, polyurethane, polyols or other, are increasingly widespread and commonly used. To aid breathability and obtain paddings with differentiated carrying capacity, grooves, cavities, incisions, holes and recesses are made in the body of the padding or different foamed materials are used. The use of different foamed materials has the advantage that the carrying capacity, the rigidity and other parameters of each area of the mattress can be pre-determined in the production phase. Said paddings are normally obtained by coupling two layers of different density or foaming and sintering the material of one or more first parts inside specific moulds, and subsequently positioning said completely formed first parts inside a second mould in which the second material is foamed and sintered. Since the two materials are similar or in any case compatible, when the second material is foamed and sintered, it attaches to and merges with the surface of the first materials, thus joining the two parts.
The subject of the present invention is a new process for the production of paddings with at least two layers provided with grooves and/or cavities and the product obtained. One object of the new process is to obtain paddings with grooves and/or cavities consisting of at least two layers, for example of different densities and/or different colour, in one single action and with limited costs. A further object of the new process is to obtain paddings having at least two layers with parts of foamed material of even very small dimensions.
A further object of the new process is to obtain paddings with grooves and/or cavities having at least two different layers by means of a reduced number of operations. These and other objects, direct and complementary, are achieved by the new process for the production of paddings with grooves and/or cavities having at least two layers.
The new process ensures the coupling, by means of adhesive substances or contact sintering/foaming, of a first layer of foamed material with a second layer, or several overlapped second layers, of foamed material also with different characteristics, typically different density and/or different colour, to form one single body subsequently called padding. Subsequently said padding is compressed between a mould element, bearing grooves and/or cavities identical to the grooves and cavities to be formed on the padding, and a second counter or pressure element, smooth or with protruding parts generally complementary to the grooves and cavities of said mould element.
In the preferred solution, said mould element consists of a surface wide enough to support the padding and provided, on the side of contact with said padding, with grooves and cavities identical to those to be obtained on the padding, while said pressure element consists of a surface, parallel to said mould element, with the side facing towards said mould element being continuous or having protruding parts complementary to said grooves and cavities present on the mould element.
The padding in which the grooves and/or cavities are to be made is positioned between the mould element and the pressure element which are brought together and pressed, thus compressing the layers of the padding between said mould element and said pressure element. Said first layer of foamed material, not involved, or involved to a limited extent in the formation of said grooves or cavities, faces towards the pressure element while the second layer of foamed material or the second layers of foamed material with different density and/or colour face towards the mould element.
When the padding is compressed between the mould element and the pressure element, the padding enters the grooves or cavities of the mould element. After said compression a sharp blade runs over the surface of the mould element facing towards the pressure element.
Said blade leaves the part of the padding outside said grooves and cavities of the mould element substantially unchanged, while it cuts the part of said padding which has penetrated said grooves or cavities of said mould element.
According to the pressure exerted between said mould element and pressure element, the depth of said grooves or cavities and the height of any protruding parts, a greater or lesser portion of foamed material of the padding penetrates said grooves and cavities and is cut by said blade. It is possible for said blade to cut the padding for a thickness lesser, equal to or greater than the thickness of the second layer or second layers and if necessary also part of said first layer of foamed material. The opening of said mould element and counter or pressure element releases the padding, which re-acquires its original compactness, containing the grooves and/or cavities resulting from the material cut by the blade. In a second solution said mould element consists of a roller, the surface of which is provided with the grooves and/or cavities to be obtained in the padding, while said counter or pressure element consists of a second roller parallel to said first mould element roller and having a smooth surface or surface with protruding parts complementary to the grooves or cavities of said mould element roller. Said pressure element roller can have a corrugated surface to facilitate feed- in of the padding.
The padding is passed between said two adjacent rollers, pressed against each other and rotating in the same direction, thus feeding forward the padding inserted and compressed between them with the first layer facing towards the pressure element roller.
The blade is fixed, positioned preferably to adhere to the surface of the mould element roller and in a position, on the circumference of said mould element roller, of least distance between said mould element roller and said pressure element roller or at the point of greatest compression of the padding inserted and compressed between said rollers.
The padding thus obtained has a first layer, substantially continuous, on which at least one second layer of foamed material is applied, having grooves or cavities less deep than said second layer. The padding thus obtained comprises a substantially continuous layer on which a second layer or second layers of foamed material are applied having grooves or cavities. Said grooves or cavities can be less deep than said second layer or less than the thickness of said second layers.
Said grooves or cavities can be as deep as the thickness of said second layer or the thickness of said second layers. Said grooves or cavities can be deeper than the thickness of said second layer, or the thickness of said second layers, also involving part of said first layer.
One, some or each of all said second layers of foamed material can consist of foamed material with equal or different density and/or equal or different colours and/or equal or different characteristics with respect to the first layer.
On the same first layer, each of said second layers can consist of portions or bands of foamed material of the same thickness but with different characteristics, positioned laterally side by side to constitute a layer of constant thickness having zones or areas with equal or different densities and/or equal or different colours and/or equal or different characteristics.
Said first layer of foamed material, not involved or involved to a limited extent in the formation of said cavities, can consist of portions or bands of foamed material of the same thickness but with different characteristics, joined together laterally to constitute a layer of constant thickness having zones or areas with equal or different densities and/or equal or different colours and/or equal or different characteristics.
A further layer of foamed material can be fixed on the side of the padding not involved in formation of the grooves. The characteristics of the new process for the production of paddings with grooves and/or cavities with two or more layers of different density and/or colour will be better clarified by the following description with reference to the drawings attached by way of non-limiting example. Figures Ia, Ib and Ic show three of the main stages in the new process according to the first preferred solution. The padding (S) consists of a first layer (Sl) on which a second layer (S2) of foamed material with different density and/or different colour is applied. A surface (Al) constitutes the mould element which, on the side in contact with the padding (S), is provided with grooves and/or cavities (As) identical to those to be obtained on the padding (S); a second surface (A2) constitutes the pressure element and is parallel to said mould element (Al).
The padding (S) is positioned between the mould element (Al) and the pressure element (A2), as shown schematically in figure 1. In particular said first layer (Sl) of the padding (S) faces towards the pressure element (A2) while the second layer (S2) of foamed material with different characteristics faces towards the mould element (Al).
The mould elements (Al) and the pressure element (A2), are brought together, as shown in figure 2, thus compressing the padding (S) between the two elements. In the grooves and cavities (As) of the mould element (Al) the padding (S) is compressed less and penetrates inside the grooves and cavities (As) of the mould element (Al).
After said compression a sharp blade (L), wider than said elements (Al, A2), runs between said two elements (Al, A2) and in particular on the surface of the mould element (Al) facing towards the pressure element (A2). Said blade (L) leaves the part of the padding (S) outside said grooves and cavities (As) of the mould element (Al) substantially unchanged while it cuts the part of said padding (S) which has penetrated into said grooves or cavities (As) of said mould element (Al).
According to the pressure exerted between said mould element (Al) and pressure element (A2), the depth of said grooves and cavities (As) and the height of any protruding parts, a greater or lesser part of foamed material of the padding (S) penetrates said grooves and cavities (As) and is cut by said blade (L).
Said blade (L) cuts the padding (S) for a thickness less than, equal to or greater than the thickness of the second layer (S2) and possibly also part of the thickness of said first layer (Sl).
The opening of said mould element (Al) and pressure element (A2), as shown in figure Ic, releases the padding (S), which re-acquires its original compactness, bearing the grooves or cavities (Sx) resulting from the material cut by the blade (L). Figure 2 shows the new process relative to a second solution in which the mould element (Rl) and pressure element (R2) consist of two rollers (Rl,
R2).
The roller (Rl) is provided with said grooves and/or cavities (Rs) on its surface. The padding (S) is passed between said two nearby rollers (Rl, R2).
The blade (L) is fixed, positioned between said two rollers (Rl, R2) and preferably adheres to the surface of the roller (Rl) that makes up the mould element, i.e. at the point of greatest compression of the padding (S) inserted and compressed between said rollers (Rl, R2). Figures 3a and 3b show two sections of two examples of finished padding
(S) produced by one of the processes described. The padding (S) has a substantially continuous first layer (Sl) joined to a second layer (S2) provided with grooves and/or cavities (Sx).
The new process has considerable advantages. It requires only a few simple operations: joining of the various layers (Sl, S2) which make up the padding (S), compression of them between the mould element (Al, Rl) and the pressure element (A2, R2) and cutting with the blade (L).
The new process requires very little time for the production of each individual padding (S).
The new process uses simple tools or tools requiring a modest financial investment. The padding (S) obtained with the new process comprises a first layer (Sl) of substantially continuous foamed material and a second layer
(S2) or several overlapped second layers of foamed material with different characteristics having grooves and/or cavities (Sx).
Therefore with reference to the preceding description and the accompanying drawings the following claims are made.

Claims

1. Process for the production of paddings (S) having at least two layers (Sl, S2) of foamed material, formed of a first layer of foamed material (Sl) to which at least one second layer of foamed material (S2) is joined, characterised in that said first (Sl) and second (S2) coupled layers are compressed between a mould element (Al, Rl) and a second counter or pressure element (A2, R2), and wherein said mould element (Al, Rl) is provided with grooves and/or cavities (As, Rs) corresponding to the grooves or cavities (Sx) to be formed on the padding (S), and wherein a blade (L), positioned or sliding between said mould element (Al, Rl) and pressure element (A2, R2) and adhering to the surface of said mould element (Al, Rl) facing towards said pressure element (A2, R2), cuts and separates the parts of one or more layers (Sl, S2) of the padding (S), which are pushed into said grooves or cavities (As, Rs), from the rest of the layers (Sl, S2).
2. Process according to claim 1, characterised in that said grooves or cavities (As, Rs) of the mould element (Al, Rl) are deep enough to be penetrated by one or more layers (Sl, S2) of the padding (S).
3. Process according to claim 1, characterised in that said pressure element (A2, R2) has on its surface facing towards the mould element (Al, Rl) protruding parts (Ar) complementary to or in any case shaped to correspond to the grooves or cavities (As, Rs) of said mould element (Al, Rl).
4. Process according to claim 1 , characterised in that said mould element (Al) consists of a surface (Al) having grooves and/or cavities (As), and wherein said pressure element (A2) consists of a second surface (A2) equal and parallel to said mould element (Al), and wherein one or both said surfaces (Al, A2) are translated in order to come together and compress the padding (S) between them, and wherein said blade (L) runs between said two elements (Al, A2) in contact with the surface of said mould element (Al).
5. Process according to claim 1, characterised in that said mould element (Al) consists of a roller (Rl) having grooves and/or cavities (Rs), and wherein said pressure element (R2) consists of a corresponding roller (R2) parallel to said mould element roller (Rl), and wherein the space between said rollers (Rl, R2) is less than the thickness of the padding (S), and wherein said blade (L) is positioned between said two rollers (Rl, R2) in contact with the surface of said mould element roller (Rl).
6. Process according to claim 5, characterised in that said pressure element roller (R2) has a corrugated surface so as to facilitate feed-in of the padding (S).
7. Padding (S), characterised in that it comprises a first layer (Sl) to which a second layer (S2) of foamed material with different characteristics is joined, and wherein said second layer (S2) is provided with grooves and/or cavities (Sx) obtained by means of cutting.
8. Padding (S) according to claim 7, characterised in that said grooves and/or cavities (Sx) are obtained by means of cutting according to the process described by one or more of the claims from 1 to 6.
9. Padding (S) according to claims 7, 8, characterised in that said grooves and/or cavities (Sx) are less deep than the thickness of the second layer (S2) of foamed material.
10. Padding (S) according to claims 7, 8, characterised in that said grooves and/or cavities (Sx) are as deep as the thickness of said second layer (S2) of foamed material.
11. Padding (S) according to claims 7, 8, characterised in that said grooves and/or cavities (Sx) are as deep as the thickness of the second layer
(S2) and part of the thickness of said first layer (Sl).
12. Padding (S) according to claims 7, 8, 9, 10, 11, characterised in that it has one or more further layers of foamed material applied on the side of said first layer (Sl) opposite said second layer (S2).
13. Mattress with foamed padding (S) characterised in that said padding
(S) comprises a first layer of foamed material (Sl) to which a second layer (S2) of foamed material with different characteristics is joined, and wherein said second layer (S2) has grooves and/or cavities (Sx) obtained by the cutting of said second layer (S2) according to the process described in the claims from 1 to 12.
PCT/IB2009/050556 2009-02-11 2009-02-11 Process for the production of layered paddings with cavities and product obtained therefrom WO2010092434A1 (en)

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Application Number Priority Date Filing Date Title
PCT/IB2009/050556 WO2010092434A1 (en) 2009-02-11 2009-02-11 Process for the production of layered paddings with cavities and product obtained therefrom

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Citations (6)

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GB191121766A (en) * 1911-10-03 1912-05-23 Frederick William Moore Improvements relating to the Production of Designs on Felt, Plush and like Fibrous Material and to Machines therefor.
US4700447A (en) * 1983-09-09 1987-10-20 Span America Medical Systems, Inc. Support pad and method of manufacture
WO2005037515A2 (en) * 2003-10-14 2005-04-28 Dreamwell, Ltd. Method for manufacturing a foam core having channel cuts
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