GLASS CERAMIC WORKTOP

Abstract

An item of equipment includes at least one worktop formed of at least one substrate made of monolithic glass material with a surface area of greater than 0.7 m.sup.2. The substrate exhibits a luminosity L* of greater than 10, a light transmission T.sub.L of less than 60%, and an opacity indicator of greater than 30. The item of equipment also includes at least one light source to materialize one or more zones or one or more elements or displays of the substrate. The at least one light source is positioned straight above the substrate. The item of equipment also includes at least one interface for communication with at least one element of the worktop and/or with at least one external element for wireless communication. The item of equipment is devoid of heating element(s).

Claims

1. An item of equipment, comprising: at least one worktop formed of at least one substrate made of monolithic glass material with a surface area of greater than 0.7 m.sup.2, said substrate exhibiting a luminosity L* of greater than 10, a light transmission T.sub.L of less than 60%, and an opacity indicator of greater than 30, at least one light source to materialize one or more zones or one or more elements or displays of the substrate, the at least one light source occurring straight above the substrate, at least one interface for communication with at least one element of the worktop and/or with at least one external element for wireless communication, said item of equipment additionally being devoid of heating element(s).

2. The item of equipment as claimed in claim 1, wherein the surface area of the substrate made of glass material is greater than 0.9 m.sup.2, the thickness of said substrate is at least 2 mm, and the thickness of the substrate is less than 15 mm.

3. The item of equipment as claimed in claim 1, wherein the substrate made of glass material occupies at least 50% of the surface area of the worktop.

4. The item of equipment as claimed in claim 1, wherein the substrate is made of tempered glass or of glass-ceramic.

5. The item of equipment as claimed in claim 1, wherein the substrate exhibits a flatness of less than 0.1% of the diagonal of the substrate.

6. The item of equipment as claimed in claim 1, wherein the substrate is opaque and/or is colored or tinted in its bulk, the coloring including white and any color with a luminosity L* greater than 10, the darker colors including black or dark brown being excluded, and the coloring exhibiting a luminosity L* of less than or equal to 97 and/or, a haze of greater than 50% and/or a light transmission T.sub.L of less than 50%, and/or an opacity indicator of greater than 90 and less than or equal to 100, the glass material forming the substrate being translucent or opaque.

7. The item of equipment as claimed in claim 1, wherein the substrate or the glass material comprises colorants and/or is provided with a coating conferring on the subtrate a coloring different from its own coloring.

8. The item of equipment as claimed in claim 1, wherein one or more zones and/or elements and/or functions and/or decorations are signaled, on activation and/or permanently, by means of one or more light sources and/or by means of a permanent decoration.

9. The item of equipment as claimed in claim 8, wherein the one or more zones and/or elements and/or functions and/or decorations are signaled by, and/or demonstrated by means of, at least one light source, on activation of said at least one light source, said at least one light source being placed above the substrate or on the side of the visible face of the substrate or on the side where the display is desired or has to be seen, and the at least one light source being configured to produce a light display by projection onto a screen-forming face.

10. The item of equipment as claimed in claim 8, wherein the substrate exhibits a light transmission T.sub.L of at least 5%, and one or more zones and/or elements and/or functions and/or decorations are signaled by, and/or demonstrated by means of, at least one light source, on activation of said at least one light source, said at least one light source being placed under the substrate and being hidden by the substrate when turned off, said at least one light source being configured to produce a light display by transmission through the worktop.

11. The item of equipment as claimed in claim 1, wherein the light source(s) or other component(s) of the item of equipment are capable of being activated by contact on the surface of the worktop and/or on the interface and/or on an external unit, or by movement.

12. The item of equipment as claimed in claim 1, wherein the item of equipment comprises several light sources which are positioned so that the angle between each source, or between each element sending the light toward the worktop, and the normal to the worktop is between 5 and 60 to minimize the effects of shadows cast by a person using the worktop.

13. The item of equipment as claimed in claim 1, wherein the interface is configured to perform wireless communication with a unit external to the worktop.

14. The item of equipment as claimed in claim 1, wherein the interface is configured to transmit different signals initiated by contact or movement in order to activate different components of the item of equipment and/or the interface is configured to download and/or transmit data the data being for example, transmitted to the at least one light source to display the data at the surface of the worktop.

15. The item of equipment as claimed in claim 1, wherein the worktop comprises one or more functional and/or decorative coatings.

16. The item of equipment as claimed in claim 1, wherein the worktop is mounted on at least one or more supporting elements thus forming, with said supporting elements, a table, an uninterrupted or interrupted piece of furniture, or a counter.

17. A worktop, comprising: at least one substrate made of monolithic glass material with a surface area of greater than 0.7 m.sup.2, said substrate exhibiting a luminosity L* of greater than 10, a light transmission T.sub.L of less than 60%, an opacity indicator of greater than 30, and a haze of greater than 15%.

18. A method, comprising: obtaining a substrate made of monolithic glass material with a surface area of greater than 0.7 m.sup.2, said substrate exhibiting a luminosity L* of greater than 10, a light transmission T.sub.L of less than 60%, an opacity indicator of greater than 30, and a haze of greater than 15%; and using the substrate with the item of equipment as claimed in claim 1.

19. The item of equipment as claimed in claim 1, wherein the substrate exhibits a haze of greater than 15%.

20. The item of equipment as claimed in claim 1, wherein the thickness of said substrate is 3 to 30 mm.

Description

[0067] Other advantageous characteristics and details will emerge below from the description of a nonlimiting embodiment of the invention, with reference to the appended drawings, in which:

[0068] FIG. 1 represents a diagrammatic perspective view of an item of equipment according to the invention;

[0069] FIG. 2 represents a diagrammatic top view of a similar item of equipment (the utensils at the surface or the underlying elements of the piece of furniture not being represented).

[0070] In this example, the item of equipment (1) according to the invention comprises a piece of furniture (2) formed of a casing (4) surmounted by a worktop (5) formed of at least one monolithic substrate (6) made of glass-ceramic, this substrate occupying the majority (in this instance all) of the surface (measured on the upper face) of the worktop. This substrate is, for example, a plate of translucent white color of the type of that sold under the KeraWhite TC reference by Eurokera, this plate exhibiting a surface area of 1.8 m.sup.2, a smooth upper face and a smooth lower face (it also being possible for this face to be provided with tear drops) and a thickness of 6 mm, and exhibiting a luminosity L* of 87.56, a haze of 98.1, a light transmission T.sub.L of 27.8% and an opacity indicator of 94.8. This substrate is, for example, obtained by proceeding as in the patent application WO 9906334 but by reducing the rate of passage in the ceramization furnace by 50%.

[0071] This substrate can also, if appropriate, be colored or provided with a layer of resin on its lower face in order to give a coloring to the substrate, for example be provided with a coat of paint based on silicone resin giving a gray coloring, the worktop (coated substrate) thus exhibiting a luminosity L* of 79.45, a haze of 100%, a light transmission T.sub.L of 1.53% and an opacity indicator of 99.94, this coat having been applied to the glass-ceramic substrate after it has been prepared.

[0072] Alternatively, this substrate can also, for example, be a plate of translucent cream color of the type of that sold under the KeraBiscuit TC reference by Eurokera, this plate exhibiting a surface area of 2.3 m.sup.2, a smooth upper face and a smooth lower face (it being possible for this face also to be provided with teardrops) and a thickness of 4 mm, and exhibiting a luminosity L* of 82.7, a haze of 95.8%, a light transmission T.sub.L of 27.8% and an opacity indicator of 96.7.

[0073] In both cases, the substrate made of glass-ceramic obtained exhibits a flatness of less than 2 mm (the flatness obtained being between 2 and 3 mm for a rate reduced by only 25% and being more than 15 mm for a rate unchanged with respect to that used in the abovementioned patent application to order to obtain a plate with standard dimensions of less than 0.4 m.sup.2), the flatness desired for good optical properties in particular being less than 3 mm and preferably less than 2 mm.

[0074] The item of equipment comprises three light sources (8), for decorative purposes for luminous effects, or intended, for example, to signal locations (for example in order to lay down hot utensils), and placed above the substrate (and overhanging the worktop). These sources signal, for example, one or more zones, for example using luminous circle(s) of more or less large size and of color (9) delimiting each location (it being possible for the colors, if appropriate, to be identical or different according to the locations). The sources (8) are formed, for example, of a plurality of LEDs carried by a seat housed in a profiled element and are, for example, integrated in a device (14) overhanging the worktop. These sources can also be used for the illumination (local or complete) of the worktop or for the display by projection of various items of information, such as the display of data, of cooking recipes (11), and the like.

[0075] The item of equipment additionally comprises at least one interface (12) (hidden by the substrate) for communication, for example, with the light sources, this interface also communicating wirelessly with an external unit in the form, for example, of a touch tablet (13) for the activation of different zones and functions of the plate or of the item of equipment. The external unit can be advantageously movable and lie on the worktop (FIG. 1) or be used for the remote activation of different zones or functions. Alternatively or cumulatively, the interface might also comprise or be connected to a permanent control panel located on the surface of the substrate (2) for the activation of different zones and functions, in particular of the substrate.

[0076] The item of equipment can also comprise other elements, in particular electrical cables (15), if need be, (for the activation of the sources, for example), and comprises drawers (16) or cupboards (17) inserted into the casing supporting the worktop, for storing various articles, and the like. The item of equipment can also comprise other elements; for example, the worktop can comprise a trim, the substrate can be coated with a localized or nonlocalized permanent decoration, for example made of enamel, the casing can be uninterrupted or comprise different recesses (such as the recess (18)) or integrate other elements (for example drawers, and the like). The worktop (5) can be used for different purposes, such as writing (as symbolized by the paper and the pen (19)), the support for objects (as symbolized by the tableware (20)), the use as a kitchen table (making it possible in particular to eat or to lay down cooking receptacles (21), if appropriate hot, and the like), and the like. If appropriate, the casing can also be replaced by supporting legs (for example only the walls 22 and 23, or four legs at the four corners, the item of equipment under the worktop in this case preferably being hidden by a localized enclosure with a thickness of a few centimeters under the substrate), such as a table.

[0077] The item of equipment according to the invention can in particular be advantageously used to produce a new range of interactive and multiuse pieces of furniture without cooking zones.