EP2923153A1

EP2923153A1 - Cooktop with window and end plate, cooking appliance, and method for manufacturing the cooktop

Info

Publication number: EP2923153A1
Application number: EP13808103.9A
Authority: EP
Inventors: Adèle VERRAT-DEBAILLEUL; Gérard Huchet; Béatrice MOTTELET; Gaëlle FERRIZ
Original assignee: Eurokera SNC
Current assignee: Eurokera SNC
Priority date: 2012-11-26
Filing date: 2013-11-25
Publication date: 2015-09-30
Anticipated expiration: 2033-11-25
Also published as: TR201904909T4; JP2016502060A; WO2014080145A1; FR2998651A1; KR20150089048A; JP6463688B2; DE202013012188U1; CN104981664B; FR2998651B1; KR102081643B1; ES2720283T3; EP2923153B1; US20150323192A1; US10107503B2; CN104981664A

Abstract

The invention relates to a cooktop (1) for a fixed or mobile cooking appliance, having a base plate (2), at least a part, or all, of the peripheral outer edge (57) of said window (5) not being in the plane of the peripheral outer edge (27) of said base plate (2), characterized in that said cooktop has at least one end plate (66) which is made of different material than that of the seal (6) and is disposed above or on said seal (6), at least a part of the outer surface (61) of said seal (6) which is located between the outer surface (21) of said base plate (2) and the outer surface (51) of said window (5) being covered by said end plate (66).

Description

The present invention relates to a cooking appliance with a cooking plate and in particular a fixed cooking appliance intended to be integrated in an opening made in a cooking chamber. The invention relates to a cooking appliance with a cooking plate. worktop or in a cooker or mobile cooking appliance that can be moved manually and easily.

A cooking plate appliance comprises a cooking plate, for example glass-ceramic, on which can be positioned a pan, a pan or any other utensil may contain food to be heated or cooked, or on which can be positioned directly food to heat or cook.

This cooking appliance, generally also has a box having a bottom and side walls forming a base inside which is (or are) positioned (s) one (or more) element (s) heating (s) , such as for example a radiant or halogen focus (s), as well as regulating means for varying the power of the latter (or of these), or even for programming its (their) release and its (their) stop. The hob closes the top of the box.

The present invention relates more particularly to a hob for a fixed or mobile cooking appliance comprising on the one hand a base plate, in particular a glass-ceramic base plate, having at least one cooking zone and on the other hand comprising at least one cooking zone. a control and / or information zone, said control and / or information zone being formed by a window separated from said base plate by at least one plastics gasket.

It is known in particular from the French patent application No. FR 2 746 904, to make a joint between a window under which is positioned a screen and the base plate. The invention that is the subject of this document lies in the selection of the material of the seal to allow sealing between the window and the base plate.

This document shows in Figure 3 a screen that "floats in a vacuum"; no means of fixing the screen is described. It is assumed that the screen is attached to the box, but there is no information about it. A first disadvantage of this configuration is that the seal is likely to be damaged by the heat emitted by a hot utensil that would be positioned very close to or even above.

A second disadvantage of this configuration is that it is difficult to achieve precise positioning and precise fixing, in the three dimensions of the space, of the screen vis-à-vis the window which is located above; however, this positioning is very important to ensure a perception of quality of the display of the screen through the window.

These two disadvantages are reinforced by the fact that the connection between the window and the base plate is a permanently elastic connection according to this document. This connection is fragile in view of the heat that can be emitted by a utensil near or on the link and is not rigid and the window can move to use. This movement is harmful for the perception of the display of the screen through the window.

This problem of the good perception of the display of the screen through the window is all the more important that it is now possible to make screens of small sizes with very high resolutions; however, if the last element interposed between the screen and the observer is not well designed, then the final resolution is seriously affected.

It is also known from European Patent Application No. EP 570 670 and

EP 2,226,565, as well as German Patent Application No. DE 2007 2007/23939, provide a seal comprising silicone between a base plate and a window. Such a seal is resistant to heat but is expensive and is difficult to implement in a large-scale industrial manufacturing process, particularly by molding.

The object of the invention is to overcome the disadvantages of the prior art and to provide an easy to implement and inexpensive solution to allow sealing between the window and the base plate vis-à-vis the outside with a seal and to ensure the protection of this seal vis-à-vis a hot utensil positioned near this seal, or on or above this seal.

Another aim is to provide a solution for the reliable and accurate positioning and the reliable and accurate fixing of a display screen with respect to a window formed in a cooking plate and through which the display of this screen is displayed. The present invention thus relates in its broadest sense to a cooking plate for a fixed or mobile cooking appliance according to claim 1. This cooking plate comprises a base plate, especially a vitroceramic base plate, having a singing a circumferential outer surface and a circumferential outer edge forming a plane and which is located at the intersection between said edge of said base plate and said outer surface of said base plate, said cooking plate having at least one cooking zone; and at least one control and / or information zone, said control and / or information zone comprising a window separated from said base plate and having a surround, an outer surface and an outer peripheral edge located at the intersection between said edge of said window and said outer surface of said window, said cooking plate further comprising a joint of synthetic material which is located between a portion of the edge of said base plate and a portion of the edge of said window to allow sealing between the window and the base plate vis-à-vis the outside, said joint presenting an outer surface.

This cooking plate is remarkable in that:

at least part of, or all, the outer peripheral edge of said window is not in the plane of the outer peripheral edge of said base plate, and in that

at least part of the outer surface of said gasket which is located between the outer surface of said base plate and the outer surface of said window is covered by a flange of material different from that of the gasket. The seal allows sealing against the outside. It is in contact with at least half the height of the edge of said base plate and is in contact with at least half the height of the edge of said window; it seals to prevent any fluid coming from outside to penetrate between these two songs.

It is not the flange that seals against the outside, but the seal; the flange is on or above the gasket to protect it.

It is possible that only a portion of the outer edge of said window is in the plane of the outer edge of said base plate.

It is also possible that at least part of, or all, the outer edge of said window is in the plane of the outer edge of said base plate. The outer peripheral edge of the base plate thus all around the base plate and constitutes the junction, all around the base plate between the edge of the base plate and the outer surface of the base plate.

Similarly, the outer peripheral edge of the window is thus all around the window and is the junction, all around the window between the edge of the window and the outer surface of the window.

The present invention thus proposes to protect the seal which is provided at least partly around the window, between the window and the base plate to prevent contact between a hot utensil and this seal.

Thus, preferably, the seal which is located between a portion of the edge of said base plate and a portion of the edge of said window does not comprise silicone.

A first option consists in choosing the material of the flange as it has a solid transformation point to viscous Tg, or a melting point Tf, which is greater than the point of transformation of the material of said seal Tg 'so that the flange brings additional resistance to heat; Preferably, the material of said flask has a viscous solid Tg transformation point, or a melting point Tf, which is at least 20 ° C higher, and more preferably at least 50 ° C, at the point of transformation. of the material of said seal Tg '.

A second option consists in choosing the material of the flange such that it has a viscous solid transformation point Tg, or a melting point Tf, which is greater than 200 ° C., and preferably greater than 250 ° C., or even higher. at 300 ° C. Thus, the flange material will withstand the presence and contact of a heat source of 200 ° C or even 250 ° C, or even 300 ° C.

It is possible to choose the material of the joint such that it has a viscous solid transformation point Tg, or a melting point Tf, which is equal to or less than 200 ° C, or which is equal to or less than 180 ° C. . Thus, it is not necessary to choose a joint material such that it has a viscous solid transformation point Tg, or a very high melting point Tf. For example, some thermoplastic silicone materials can withstand (i.e. without modification of their mechanical properties) temperatures up to 225 ° C, or even up to 320 ° C, but in general these materials are very expensive and are difficult to implement.

For the purposes of this document, "solid to viscous transformation point Tg" is to be understood as a "glass transition temperature, Tg" in the usual sense. It is also possible for an air gap and / or an insulating element (for example made of polystyrene or polyurethane foam or of ceramic or comprising mineral fibers, and in particular glass fibers) to be interposed between the said flange and the said flange. seal, under a portion of said flange to further improve the protective effect of the seal by the flange.

The flange according to the invention is preferably unique. It is preferably present all along the portion of the seal which separates said window from said base plate. If several flanges are provided along the joint, the distance between two flanges must be equal to or less than 2 mm in order to maintain the effect of protection against heat.

The gasket preferably covers at least a portion of the length of the outer edge of said base plate and / or the gasket preferably covers at least a portion of the length of the outer edge of said window.

The flange may be in the continuity ("flush") of at least a portion of the length of the outer edge of said base plate and / or may be in the continuity ("flush") of at least a portion the length of the outer edge of said window to obtain a good visual integration of the flange.

It is furthermore preferable that, seen in vertical section at at least one place, said seal has a visible outer surface (that is to say not covered by a flange portion) whose width is equal to or smaller than 2 mm said flange preferably covering the entire outer surface of the gasket which is located between the outer surface of said base plate and the outer surface of said window, so as to be sure that the heat of a utensil can not damage the gasket .

In a particular version, said flange comprises, seen in vertical section at a location at least, two parts:

a substantially vertical part situated above the plane of the outer surface of said base plate, and

- A substantially horizontal portion located in the continuity ("flush") of at least a portion of the outer edge of said window or located above at least a portion of the outer edge of said window.

In another particular version, said flange comprises, seen in vertical section at a location at least, a shape of S with on the one hand the upper part of the S located in the continuity ("flush") of at least a portion of the outer surface of said window or located over at least a portion of the outer surface of said window and on the other hand the lower part of the S extending to said base plate and located above the outer surface of said base plate.

In another particular version, said flange comprises, seen in vertical section at a location at least, a shape of S with on the one hand the upper part of the S located in the continuity ("flush") of at least a portion of the outer edge of said window or located above at least a portion of the outer edge of said window and on the other hand the lower portion of the S extending towards said base plate and located lower than the plane of the outer surface of said base plate.

In another particular version, the flange comprises, seen in vertical section at a location at least, a form of C or C with on the one hand the upper part of the C located in the continuity ("flush") of a part in less than the outer edge of said window or located above at least a portion of the outer edge of said window and with the lower portion of the C extending to said window and located above from the plane of the outer surface of said base plate.

Preferably, the cooking plate comprises a control screen and / or display under said window. It is then possible that it is the seal and / or the flange which comprises (s) means for fixing this control screen and / or display under said window.

The present invention thus proposes to use directly the seal which is provided at least partly around the window, between the window and the base plate, to position and fix the control and / or display screen vis-à-vis view of this window and / or use directly the flange protecting the gasket which is provided at least partly around the window, between the window and the base plate, to position and correctly fix the control screen and / or visualization vis-à-vis this window.

The window which is thus located above the control and / or display screen is transparent in order to allow to see through what is displayed on the screen; it is in a material different from that of the base plate; the screen is LCD, LED or OLED and maybe a touch screen.

Fixing the screen to the seal is preferably a mechanical attachment and is thus not a chemical fixation (especially bonding). The seal preferably has a central portion which is located both facing at least a portion of the edge of the window and facing a portion of the periphery of the cut-out hole. in the base plate and which welcomes the window.

According to an important feature of the invention, said gasket preferably has an inner seal portion extending under an inner surface of said base plate and / or an inner surface of said window. This inner part thus makes it possible to increase the mechanical strength of the connection between the gasket and respectively said base plate and / or said window.

This part of the inner seal may have, for example, under the inner surface of the window, in vertical section, a form of C or L.

According to variants of the invention, the cooking plate can comprise:

at least one insert which is completely integrated in said seal,

- On the one hand a sole which is integrated at least partially, or completely, in a portion of material of said seal and on the other hand at least one projecting element projecting at least partially, or completely, outside said joint, for the fixing said control and / or display screen;

at least one screw and / or a support and / or a clip and / or a rail, for fixing the control and / or display screen to said seal.

It is also possible for at least part of an outer surface of said window (in the case of the window inclined with respect to the base plate), or even an entire external surface of said window (in the case of the projecting window or recessed relative to the base plate) is not in the plane of an outer surface of said base plate.

Preferably, said seal has an outer seal portion extending over a central seal portion and optionally extending to an outer surface of said baseplate and / or an outer surface of said window.

The present invention also relates to a fixed or mobile cooking appliance provided with a cooking plate according to the invention.

The present invention also relates to several methods of manufacturing the cooking plate according to the invention.

In a first method of manufacturing the cooking plate according to the invention, said base plate, said window and said flange at least are arranged in a mold which is then closed and a synthetic material is then injected into a mold cavity to form said seal.

In a second method of manufacturing the hob according to the invention, a preformed seal and having at least said flange is bonded to said base plate and / or said window.

In a third method of manufacturing the cooking plate according to the invention, said gasket comprising at least said flange is molded against said base plate or against said window, said window or said base plate being then inserted into a groove of a frame formed by the joint when the one is hot.

Advantageously, the present invention allows, in a simple and effective way, in a cooking plate, to protect the heat seal between the base plate and the window. It is thus not necessary to implement a very complex and very expensive joint which in itself presents the ability to withstand the heat of a utensil placed near or above. The flange thus provides a housing to effectively protect the joint heat that could affect its properties and / or appearance.

Advantageously also, the seal according to the invention makes it possible to protect the edge of the window, even if this window is not in the surface continuity of the plate (projecting with respect to the external surface of the plate but parallel to the plate) or if this window is inclined with respect to the plate.

Advantageously also, the seal according to the invention makes it possible to position accurately in the three dimensions of the space and to fix accurately in the three dimensions of the space a control screen and / or display vis-à-vis a window located above. Positioning accuracy and fixing accuracy can be as high as one tenth of a millimeter.

Advantageously also, the seal according to the invention makes it possible to ensure fluid tightness between the edge of the window and the periphery of the hole made in the plate, even if this window is not in the continuity of the surface of the plate. (protruding from the outer surface of the plate but parallel to the plate) or if this window is inclined relative to the plate. Advantageously also, the solution of the invention is applicable even when the control zone and / or information is located on the edge of the hob.

Advantageously, furthermore, the fact that the control and / or display screen is attached to the seal and / or the flange makes it possible to easily change the screen if necessary (in the event of a faulty screen): access under the hob and undo the means for fixing the screen; in addition, it is easy and inexpensive to proceed to change the faulty screen by a properly functioning screen which will in turn be accurately positioned and precisely fixed vis-à-vis the window; it is not necessary to change the base plate, the window, or to redo the joint between the base plate and the window.

It is also possible to provide that the flanges do not have the same external appearance and in particular do not have the same color of outer surface of a cooking plate to another, to allow to "customize" the cooking plates of the same series.

The present invention will be better understood on reading the following detailed description of nonlimiting exemplary embodiments and the attached figures:

• Figure 1 illustrates a schematic top view of a cooking plate according to the invention having a base plate having a complete hole and a window in this hole;

FIG. 2 illustrates a partial vertical sectional view along AA 'of FIG. 1;

FIGS. 3 to 11 respectively illustrate a section equivalent to that of FIG. 2 for other embodiments of the invention;

FIG. 12 illustrates a schematic view of another base plate according to the invention notched to accommodate a window;

FIG. 13 illustrates a sectional view of an exemplary embodiment of a mold for producing the seal according to one embodiment of the seal according to FIG. 3; and

FIGS. 14 to 16 respectively show a view from above of a portion of the mold of FIG. 13 and a partial vertical sectional view along BB 'and according to CC of FIG. 14. It is specified that the proportions between the various elements represented are not rigorously respected in these figures and the elements in the background are not all represented in order to facilitate their reading. In particular the distance visible in the figures between the base plate and the window has no limiting value.

Figure 1 illustrates an embodiment of a cooking appliance according to the invention. The apparatus illustrated here thus has a generally parallelepipedal right shape.

The apparatus illustrated here is a fixed cooking appliance, also called an "integrated appliance", which is intended to be installed in an opening in a worktop or a stove and which, once installed and fixed, can not to be moved; however, the present invention is also applicable to a mobile cooking appliance, being in the form of a box and which can be positioned for example on a worktop or a dining table and can be moved manually.

The cooking apparatus comprises a cooking plate 1 which is flat and which has a general shape of parallelepiped right (that is to say, rectangle or square view from above).

This cooking plate 1 comprises a base plate 2, which can be in particular a glass-ceramic plate.

Although the most common form for the baseplate is a rectangle shape seen from above, the baseplate may also have a top view, a circular shape, or bean, or trapezoidal; the only form constraint is that related to the method of manufacture of the base plate.

The base plate 2 has an outer surface 21 intended to be positioned horizontally and on which the cooking utensils (pans or other) to be heated to rest; In the following description, the cooking plate 1 according to the invention is considered to be positioned horizontally and the positions: under / below and on / above are made relative to the vertical.

The base plate 2 further comprises an inner surface 22 which is located vis-à-vis its outer surface 21 and a peripheral edge 20, located between these two surfaces.

The base plate 2 also has a peripheral outer edge 27 which is located at the junction between its edge 20 and its outer surface 21 and which forms a plan. This plane is thus defined by the periphery of the base plate 2 which is formed by the outer edge 27.

Even if a base plate is generally flat, it can happen that a base plate is curved, especially towards the inside of the cooking appliance. In this case, the curved shape is formed inside the periphery of the base plate which is defined by the outer edge 27, so that this outer edge always forms a plane.

The cooking plate 1 has here four cooking zones 3, 3 ', 3 ", 3"', represented here by circles of different diameters, but which can be of any shape.

The cooking plate 1 also comprises a control and / or information zone 4.

Under each cooking zone is positioned a heating element (not shown) such as a radiant or halogen element and / or at least one gas burner and / or at least one induction heating coil. Moreover, for simplicity also, the power supply of the heating element has not been illustrated.

The control zone and / or information 4 is the place where it is possible to control the operation of each cooking zone 3, 3 ', 3 ", 3"' and / or where it is possible to view information relating to the operation of each cooking zone 3, 3 ', 3 ", 3"'.

Here, the single control and / or information zone 4 is the place from which it is possible to independently control the operation of all the cooking zones 3, 3 ', 3 ", 3"' and where it is it is possible to independently display information relating to the operation of all these cooking zones 3, 3 ', 3 ", 3"'; however, there could be for example two control and / or information areas, with for each control and / or information zone the possibility of independently controlling the operation of two of the four cooking zones and the possibility of viewing independently of the information relating to the operation of these two cooking zones.

It is also possible for the (or each) control and / or information zone to control other apparatus (s) and / or to display information relating to other apparatus (s) ( s), or even visualize any type of information. The control and / or information zone 4 is formed by a window 5 which is made of a material different from that of the base plate 2.

In particular, when the base plate 2 is glass-ceramic, its constituent material prevents a clear and precise transmission of information through.

The window 5 is preferably made of glass, optionally tempered thermally or chemically or optionally hardened. It is transparent, with a light transmission integrated in the visible higher than 70% (measured for example according to the illuminant D65); it is clear and preferably has a blur of less than 50%.

It is possible to provide a transparent polymer film under a glass sheet to form a particularly strong window.

The window 5 is separated, preferably without direct physical contact, from the base plate 2 by a seal 6 of synthetic material, non-mineral.

Here, the window 5 has a top view of the shape of a rectangle and is positioned in a hole of similar shape but whose periphery 25 is a little wider and a little longer than the window and has been arranged beforehand in the base plate 2. This hole is a hole opening in the direction that it opens on the outer surface 21 of the base plate 2, as well as on its opposite surface: the inner surface 22 of the base plate 2 (no visible in Figure 1); this parallelepipedic hole is a complete hole in the sense that its entire outer periphery is formed on the outer surface 21 and all its inner periphery is formed on the inner surface 22.

Although the most common form for the window is a rectangle shape seen from above, the window may also have, seen from above, a circular shape, or bean, or trapezoidal; the only constraint of form is that related to the mode of manufacture of the window.

The window 5 has an outer surface 51 oriented in space as the outer surface 21 of the base plate 2, i.e. which is on the top of the cooking appliance.

The window 5 further comprises an inner surface 52 which is situated opposite its outer surface 51 as well as a peripheral edge 50 situated between these two surfaces.

The edge 50 of the window 5 is smaller than the periphery 25 of the hole of the base plate when the window is located in this hole; however, the window 5 can also be positioned above this hole being larger than this hole and it is then possible that the edge 50 of the window 5 is larger than the periphery 25 of the hole of the base plate.

The window 5 also has an outer peripheral edge 57 which is located at the junction between its edge 50 and its outer surface 51 and which forms a plane. This plane is thus defined by the periphery of the window 5 which is formed by the outer edge 57.

Even if a window 5 is generally flat, it may happen that a window 5 is curved, especially towards the inside of the cooking appliance. In this case, the curved shape is preferably made inside the perimeter of the window 5 which is defined by the outer edge 57, so that this outer edge forms a plane, in order to facilitate the integration of the window 5 with respect to the base plate 2.

The seal 6, which is located between a portion of the edge 20 of the base plate 2 and a portion of the edge 50 of the window 5, and which thus makes a junction of material between the edge of the base plate and the edge of the the window also has an outer surface 61 which is also spatially oriented as the outer surface 21 of the base plate 2, i.e. which is on the top of the cooking appliance.

The seal 6 may for example be based on thermoplastic; it can be based on or in: polycarbonate, polyvinyl chloride or polyurethane; all of these materials have a melting temperature of 200 ° C or less and even 180 ° C or less.

At least a portion of the outer surface 61 of the gasket 6 which is located between the outer surface 21 of said base plate 2 and the outer surface 51 of the window 5 is covered with a flange 66, 66 'of a material different from that attached 6.

The flange 66 thus protects the gasket 6 in the configuration where at least a part of or all the outer edge 57 of the window 5 is not in the plane of the outer edge 27 of the base plate 2, as shown in FIGS. 5 to 8, 9 on the right, 10 and 11.

The flange 66 'thus protects the gasket 6 in the configuration where at least part of, or all, the outer edge 57 of the window 5 is in the plane of the outer edge 27 of the base plate 2, as visible in figures 2 to 4 and 9 on the left.

The flange 66, 66 'may be for example stainless steel, a thickness of 2 mm, or possibly less. The melting temperature of the material of the flask is greater than 200 ° C, and even greater than 250 ° C, and even greater than 300 ° C.

In a variant visible in FIGS. 2, 3 and 5 to 11, said gasket 6 comprises means for fixing, directly or indirectly at the gasket 6, in the three dimensions of the spaces x, y, z, of a screen 7. control and / or display under the window 5, so that the orientation of said screen relative to the window 5 is unchanged as soon as the screen is fixed rigidly to said window and it is then possible to view the display of the screen 7 through the window 5.

In another variant visible in Figure 4, it is the flange 66 'which comprises means for fixing a control screen 7 and / or viewing under said window 5. Although this is not illustrated, this variant also applies to the flange 66 which thus protects the seal 6 in the configuration where at least part of or all the outer edge 57 of the window 5 is not in the plane of the outer edge 27 of the base plate 2.

In these two variants, the screen 7 is thus correctly parallel to the window 5 and the display of the display is ideal. There is no deformation of the image through the window 5.

Preferably, the window is attached on its edge to the base plate 2 only by the seal 6 or the flange 66, 66 'according to the variant.

The seal 6 is present all around the periphery of the window 5, or in any case along the periphery of the window 5 which is opposite the base plate 2.

The flange 66, 66 'is thus present over the entire periphery of the window 5, or in any case along the periphery of the window 5 which is opposite the base plate 2 in order to protect the seal .

The seal 6 thus has a central portion 60 which is located both vis-à-vis at least a portion of the edge 50 of the window 5 and vis-à-vis a portion of the periphery 20 of the hole formed in the base plate 2 and which accommodates the window 5.

As explained below, this central portion 60 may be located opposite at least a portion of the edge of the window 5 over the length and / or the height of this edge 50 and this central portion of seal 60 may be located opposite at least a portion of the periphery of the hole along the length and / or the height of this hole. According to a feature of the invention, the gasket 6 preferably has an inner seal portion 62 extending under the inner surface 22 of the plate 2 and / or under the inner surface 52 of the window 5.

The seal 6 has an inner seal portion 62 which preferably extends both under the inner surface 22 of the plate 2 and under the inner surface 52 of the window 5, as illustrated with reference to FIGS. , in order to improve the mechanical strength between the window 5 and the base plate 2 via the gasket 6.

In a first sub-variant embodiment of the invention, it is the gasket 6 itself which makes it possible to directly hook up the screen 7; to do this, the inner seal portion 62 has, in the inner surface 52 of the window 5, in vertical section:

- Or a form of C, in order to accommodate a portion of the screen 7 control and / or visualization in a groove 63 created between the wings of C, as shown in Figures 2 and 5,

- Or a form of L, in order to be able to rest the screen 7 on the base of the L, between this base and the inner surface 52 of the window 5.

In these two configurations, it is possible for the inner seal portion 62 to extend below the inner surface 22 of the plate 2.

In these two configurations, the C or L shape is sufficiently elongated to form a rail to accommodate two sides of the screen 7.

With these configurations, it is thus possible to slide the screen 7 in the x direction to position it properly under the window 5. The blocking in the direction is ensured by at least one stop 64 which is present in each groove 63. blocking in the z direction is ensured by the fact that the height of the groove 63 is substantially the same as the thickness of the screen 7, or at least the same as the thickness of the part of the screen 7 which must slide inside the groove.

Referring to Figure 1, the screen can thus be slid under the window 5 in the groove 63 by the right or left; it is also possible to provide that a left or right edge of the gasket 6 is also provided with an L-shaped or C-shaped inner seal portion 62 so that the screen is held on three sides once properly positioned under the window 5.

To increase the mechanical strength of the seal 6, it is possible to provide that it comprises an insert completely integrated in the material of the seal. This insert is preferably metallic, with a coefficient of expansion which is preferably relatively low and which is adjusted to the thermal constraints of manufacture of the seal 6 and operation of the cooking appliance.

The insert can be perforated so that the material of the seal penetrates through the performances and thus increases the mechanical cohesion between the insert and the seal.

Sectional view, the insert can be positioned at least partly in the central portion of seal 60 and / or in the outer seal portion 61 and / or in the inner seal portion 62.

In an alternative to the first sub-variant embodiment of the invention, it is not the gasket 6 itself which makes it possible to directly hook the screen 7, but an accessory attached to the gasket 6 which makes it possible to hang indirectly the screen 7 at the joint 6.

This accessory may be for example an insert as indicated above, but having on the one hand a sole 80 which is integrated at least partially or completely into a portion of material of the gasket 6 and on the other hand at least one salient element 81 protruding at least partially, or completely, outside said seal 6, for fixing said screen 7 control and / or visualization. The projecting element 81 extends approximately perpendicular to the general plane of the sole 80.

The sole 80 may be provided along two left and right edges of the window 5 (with reference to the positioning of Figure 1). It reinforces the mechanical connection between the gasket 6 and the screen 7.

The salient element 81 can be in various forms:

- In Figures 3, 4 and 6, the projecting element is a screw 82, welded to the sole 8 at its upper end and provided with a thread in its lower part to allow to screw a nut; preferably, two screws are provided at least along each of the two left and right edges of the window 5 to allow to retain a support 85, fitted on the screws 82 and on which the screen 7 is fixed and thus allow the fixing the screen indirectly to the gasket 6 in the three dimensions of the space;

- In Figure 7, the projecting element is a support 83 curved (or clip) L-shaped; two supports 83 are preferably provided along each of the two left and right edges of the window 5 in order to position and fix the screen 7 correctly under the window 5; for better restraint, it is possible to provide that the screen is sandwiched on each side left, right, between the support 83 and the inner seal portion 62; this support 83 can be manufactured for example by folding.

in FIGS. 8 to 11, the insert is an H-shaped rail 84; a rail 84 is preferably provided along each of the two left and right edges of the window 5 to allow the screen 7 to slide on the rails to position it correctly under the window 5; for better restraint, it is possible to provide that the screen is sandwiched on each left side, right, between the projecting portion of the rail 84 and the inner seal portion 62; this rail can be manufactured for example by extrusion.

Alternatively, the protruding element could be a clip in the manner of known clips for fixing glazing in the bay of a body.

It is also possible to provide that a nut is attached (for example welded) to a projecting part of an insert.

As can be seen in FIGS. 2 to 4, it is possible to provide for the window 5 to have the same thickness as the base plate 2 and for the outer surface 51 of the window 5 to be exactly in continuity with the outer surface 21 of the window. base plate 2.

However, it is also possible for the window 5 to be thinner than the plate 2 and for the seal 6 to be able to compensate for this difference in thickness to allow the outer surface 51 of the window 5 to be exactly in line with the surface. outside 21 of the base plate 2; in this case, the inner surface 52 of the window 5 is set back from the inner surface 22 of the base plate 2 upwards.

In FIGS. 2 to 4, the central joint portion 60 makes it possible to provide a surface continuity between the outer surface 51 of the window 5 and the outer surface 21 of the base plate 2 by sealing in a fluid-tight manner exactly the space available between these two surfaces. There is also surface continuity between the outer edge 57 of the window 5 and the outer edge 27 of the base plate 2.

In Figure 2, the seal 6 is flush with the outer edge 27 and with the outer edge 57, but the flange 66 'is raised relative to the plane defined by the outer edge 27. The flange 66' has a vertical section a form of rectangle or square. This raised position of the flange prevents any contact between a kitchen utensil and the seal 6 by making a vertical stop. In FIG. 3, the flange 66 'is positioned flush, with its outer face in the plane defined by the outer edge 27.

In FIG. 4, the window 5 also has the same thickness as the base plate 2 and the gasket 6 is also flush with the outer edge 27 and with the outer edge 57 and the flange 66 'is also raised relative to the plane defined by the outer edge 27, but further means for fixing the control screen 7 and / or viewing under said window 5 are attached to the flange 66 '. In addition, the flange 66 'has, in its portion above the plane defined by the outer edge 27, in vertical section, a trapezoidal shape with the broad base of the trapezium at the bottom. This raised position of the flange prevents any contact between a kitchen utensil and the seal 6 by making a vertical stop. It is possible to provide holes in the flange so that the material of the central portion of seal 60 passes through the flange for better maintenance.

In Figures 5 to 8, the outer surface 51 of the window 5 projects from the outer surface 21 of the base plate 2 upwards; the outer surface 51 of the window 5 is thus raised with respect to the outer surface 21 of the base plate 2. In this configuration the totality of (all) the outer edge 57 of said window 5 is not in the plane of the outer edge 27 of said base plate 2.

This can be achieved for example by providing:

that the inner surface 52 of the window 5 is exactly in continuity with the inner surface 22 of the base plate 2 but that the window 5 is thicker than the base plate 2; or

- The window 5 has substantially the same thickness as the base plate 2 and the inner surface 52 of the window 5 is also set back from the inner surface 22 of the base plate 2, upwards.

In FIG. 5 is illustrated the fact that the central part of the joint 60 makes the joint over the entire periphery of the window 5 between the edge 20 of the base plate 2 and the edge 50 of the window 5, in order to protect the edge 50 of the window 5. This protection is completed by the flange 66

Alternatively, it is possible to provide that some edges, or all peripheral edges of the outer surface 51 of the window 5 is bevelled (not right angle).

It is possible to provide that the window 5 allows a magnifying effect vis-à-vis the screen 7 for any observer looking at the screen 7 of the top of the window 5, or by by means of a glass sheet having a particular focal length, or by means of a transparent polymer film glued against the inner surface 52.

In FIGS. 9 to 11, unlike all the preceding variants, the window 5 is not positioned parallel to the base plate 2, but inclined with respect to this plate, by an angle α of between 2 ° and 45 °. °, even between 5 ° and 25 °.

In the configuration of Figure 9, only part of the outer edge 57 of said window 5 (left in the figure) is in the plane of the outer edge 27 of said base plate 2 and part of the outer edge 57 of said window 5 (right in the figure) is not in the plane of the outer edge 27 of said base plate 2.

In FIG. 9 is also illustrated the fact that the central joint part 60 carries out the tight joint over the entire periphery of the window 5 between the edge 20 of the base plate 2 and the edge 50 of the window 5, in order to protect the edge 50 of the window 5. This protection is completed by the flask 66 'on the left of the figure and the flask 66 on the right of the figure.

For FIGS. 10 and 11, again, the totality of (all) the outer edge 57 of said window 5 is not in the plane of the outer edge 27 of said base plate 2. The central part of the joint 60 performs the sealing joint over the entire periphery of the window 5 between the edge 20 of the base plate 2 and the edge 50 of the window 5, in order to protect the edge 50 of the window 5 and this protection is completed by the flange 66.

In Figure 12 another base plate 2 is shown: unlike the base plate of Figure 1, only two cooking zone 3, 3 'are provided.

Moreover, unlike the base plate of FIG. 1, the hole that accommodates the control and / or information zone 4 is not a complete hole, but a partial hole, along one of the edges of the base plate 2 (here the right edge).

Thus, this hole is a hole opening in the direction that it opens on the outer surface 21 of the base plate 2, as well as on its inner surface 22, but this hole is not a complete hole in the sense that its periphery, both on the outer surface and on the inner surface, is not closed.

In this case, the seal 6 is present only along three edges of the periphery of the window 5, or in any case along the periphery of the window 5 which is opposite of the base plate 2. A flange according to the invention protects the seal to prevent contact of the seal with a hot cookware.

It is possible to provide that the window 5 extends beyond the edge (here the right edge) of the base plate 2 in which is formed the notch which forms the hole.

For this variant of Figure 12, it is possible to use one of the seal solutions 6 and flange 66 or 66 'shown in Figures 2 to 11.

Whatever the shape of the hole (Figure 1 or Figure 12) in which the window 5 is positioned or above which the window 5 is positioned, this hole is preferably formed by cutting the base plate 2 before the ceramization step in the case of a glass ceramic base plate.

It is possible to provide that the window 5 is compatible with a touch screen 7 by providing a conductive transparent film against the inner surface 52.

The solutions presented above for the fixing of the control screen 7 and / or display under said window 5 have the important advantage of being able to change the screen 7, if necessary, without requiring the change of the window 5 and especially, without the need to change the seal 6 with its (or its) flange (s), while ensuring that the new screen 7 is correctly positioned and fixed relative to the window 5.

Moreover, although it is not drawn, it is possible that the base plate is not flat; In this case, at least in part along the periphery of the hole in the base plate, the outer surface of the window has a shoulder, inwardly or outwardly.

To make the seal 6 and the (or) flange (s) 66, 66 ', several solutions can be implemented alternately:

In a first solution, called "encapsulation", illustrated with reference to FIGS. 13 to 16 in connection with the solution of FIG. 3, the base plate 2, the window 5 and the flange (s) ) 66, 66 'and means for fixing the control screen and / or display are all disposed in a mold portion 90 and another mold portion 91 is closed on the previous; A molding cavity 92 is formed between these two mold parts, this cavity having the desired shape of the seal 6 (here the shape of the seal of Figure 3).

The mold cavity 92 also has recesses 93 for positioning the screws 82 before molding so that the sole 80 of each screw is positioned in the mold cavity but that the threaded portion of each screw is protected so that the material of the seal does not come into contact with the thread when molding the seal.

Then a synthetic material is injected into the molding cavity to form the seal 6 comprising means for fixing the control screen and / or display.

This solution is particularly convenient to implement when the seal has an insert because it ensures the correct positioning of the insert vis-à-vis the elements introduced into the mold: the base plate 2, the window 5 and the flange (s) 66, 66 '.

FIGS. 14 to 16 illustrate a way of correctly positioning the base plate 2 and the flange (s) 66, 66 'vis-a-vis the mold part 90 and the window 5 facing each other. of this mold part 90.

The mold part 90 thus comprises retractable centering elements 95 for centering the base plate 2 vis-à-vis the mold part 90, as well as fixed centering elements 96 for centering the window 5 screws. with respect to the mold part 90.

After centering of the base plate 2 with respect to the mold part 90 by means of the retractable centering elements 95, as in FIG. 10, these elements are retracted into the mold part 90, then the window 5 is introduced into the mold part and is centered by means of the fixed centering elements 96, as in FIG.

It should be noted that for the encapsulation solution, it is not necessary for the mold to accommodate the whole of the base plate 2; it can be provided that the molding is operated only on a part of the base plate 2, the part which has the hole in which the window 5 is fixed thanks to the seal 6.

In a second solution, called "gluing", the gasket 6 is preformed (made in previously desired shape) and it thus already comprises the (or the) flange (s) 66, 66 'and means for fixing the control and / or display screen 7; then, this seal 6 is glued to the base plate 2 and / or to the window 5.

In a third solution, called "by retraction", the seal 6 comprising the

(or the) flange (s) 66, 66 'and means for rigid attachment of the control screen and / or display is molded against the base plate 2 or against the window 5; then, the window 5 or respectively the plate 2 is then introduced into a groove of the frame formed by the gasket 6 when the gasket is hot and the window 5 is then fixed to the base plate 2 by retraction of the material constituting the gasket 6, without chemical adhesion between the gasket and the window or respectively the base plate.

If the seal is molded against the base plate 2, the groove of the frame accommodating the window 5 is formed by the central seal portion 60, the outer seal portion 61 extending on the window 5 and the inner seal portion 62 extending under the window 5.

If the seal is molded against the window 5, the groove of the frame accommodating the base plate 2 is formed by the central seal portion 60, the outer seal portion 61 extending on the base plate 2 and the inner seal 62 extending under the base plate 2.

The present invention is described in the foregoing by way of example. It is understood that the skilled person is able to achieve different variants of the invention without departing from the scope of the patent as defined by the claims.

Claims

Cooking plate (1) for a fixed or mobile cooking appliance comprising a base plate (2), in particular a glass-ceramic base plate, having a edge (20), an outer surface (21) and an outer edge ( 27) forming a plane and which is located at the intersection between said edge (20) and said outer surface (21), said cooking plate (1) having at least one cooking zone (3, 3 ') and at least one control and / or information zone (4), said control and / or information zone (4) comprising a window (5) separated from said base plate (2) and having a voice (50) an outer surface (51) and a peripheral outer edge (57) located at the intersection between said edge (50) and said outer surface (51), said cooking plate (1) further comprising a gasket (6) synthetic material which is located between a portion of the edge (20) of said base plate (2) and a portion of the edge (50) of the ladi window (5) for sealing between said window and said base plate, said seal (6) having an outer surface (61), at least a portion of, or all, the peripheral outer edge (57) of said window (5) not being in the plane of the outer edge (27) peripheral of said base plate (2), characterized in that said cooking plate comprises at least one flask (66) of material different from that of the gasket (6) which is disposed above or on said gasket (6), at least a portion of the outer surface (61) of said gasket (6) which is located between the outer surface (21) of said gasket plate (6); base (2) and the outer surface (51) of said window (5) being covered by said flange (66).

2. Cooking plate (1) according to claim 1, characterized in that the material of said flask (66) has a viscous solid transformation point Tg, or a melting point Tf, which is greater than the transformation point of the material of said seal (6) Tg '.

3. Plate (1) for cooking according to claim 1 or claim 2, characterized in that the material of said flask (66) has a solid transformation point to viscous Tg, or melting Tf, which is greater than 200 ° C, and preferably greater than 250 ° C, or even greater than 300 ° C.

4. Plate (1) cooking according to any one of claims 1 to 3, characterized in that the material of said seal (6) has a solid transformation point to viscous Tg ', or fusion Tf, which is equal or less than 200 ° C or even equal to or less than 180 ° C.

5. Cooking plate (1) according to any one of claims 1 to 4, characterized in that an air gap (67) and / or an insulating element (68) is interposed between said flange (66) and said seal (6), under a portion of said flange (66).

6. Plate (1) cooking according to any one of claims 1 to 5, characterized in that said flange (66) is present all along the portion of the seal (6) which separates said window (5) of said base plate (2).

Cooking plate (1) according to any one of claims 1 to 6, characterized in that said seal (6) covers at least a part of the length of the outer edge (27) of said base plate ( 2) and / or said seal (6) covers at least a portion of the length of the outer edge (57) of said window (5).

8. Plate (1) cooking according to any one of claims 1 to 7 characterized in that said flange (66) is in the continuity of at least a portion of the length of the outer edge (27) of said base plate (2) and / or is in the continuity of at least a portion of the length of the outer edge (57) of said window (5).

9. Plate (1) cooking according to any one of claims 1 to 8, characterized in that, seen in vertical section at a location at least, said seal (6) has a visible outer surface (64) whose width is equal to or smaller than 2 mm, said flange (66) preferably covering the entire outer surface (61) of the gasket (6) which is located between the outer surface (21) of said base plate (2) and the outer surface (51) of said window (5).

10. Plate (1) cooking according to any one of claims 1 to 9, characterized in that said seal (6) comprises means for fixing a screen (7) for control and / or viewing under said window (5).

11. Plate (1) cooking according to any one of claims 1 to 9, characterized in that said flange (66) comprises means for fixing a screen (7) for control and / or visualization under said window (5).

12. Plate (1) cooking according to any one of claims 1 to 11, characterized in that said flange (66) comprises, in vertical section at a location at least, two parts:

a substantially vertical portion located above the plane of the outer surface (21) of said base plate (2), and - a substantially horizontal portion located in the continuity of at least a portion of the outer edge (57) of said window (5) or located above at least a portion of the outer edge (57) of said window (5).

13. Plate (1) cooking according to any one of claims 1 to 12, characterized in that said flange (66) comprises, seen in vertical section at a location at least one S shape with on the one hand the upper part of the S situated in the continuity of at least part of the outer surface (51) of said window (5) or situated above at least a portion of the outer surface (51) of said window (5); ) and on the other hand the lower part of S extending towards said base plate (2) and located above the outer surface (21) of said base plate (2).

14. Plate (1) cooking according to any one of claims 1 to 12, characterized in that said flange (66) comprises, seen in vertical section at a location at least one S shape with on the one hand the upper part of the S situated in the continuity of at least part of the outer edge (57) of said window (5) or located above at least a portion of the outer edge (57) of said window (5) and on the other hand the lower part of S extending towards said base plate (2) and located lower than the plane of the outer surface (21) of said base plate (2).

15. Plate (1) cooking according to any one of claims 1 to 12 characterized in that said flange (66) comprises, seen in vertical section at a place at least, a form of C or C with on the one hand the upper part of C situated in the continuity of at least part of the outer edge (57) of said window (5) or situated above at least part of the outer edge (57) of said window (5) and on the other hand the lower part of C extending towards said window (5) and located above the plane of the outer surface (21) of said base plate (2).

16. Fixed or mobile cooking appliance with a cooking plate (1) according to any one of claims 1 to 15, said cooking plate comprising a base plate (2), in particular a vitroceramic base plate, having an edge (20), an outer surface (21) and a peripheral outer edge (27) forming a plane and which is situated at the intersection between said edge (20) and said outer surface (21), said plate (1) having at least one cooking zone (3, 3 ') and at least one control and / or information zone (4), said control and / or information zone (4) having a separate window (5) of said base plate (2) and having an edge (50), an outer surface (51) and an outer edge (57) peripheral to the intersection between said edge (50) and said outer surface (51), said plate (1) further comprising a seal (6) of synthetic material which is located between a portion of the edge (20) of said base plate (2) and a portion of the edge (50) of said window (5) to allow sealing between said window and said base plate, said seal (6) having an outer surface (61), at least a portion of, or all, the outer peripheral edge (57) of said window (5); being not in the plane of the outer edge (27) peripheral of said base plate (2), characterized in that said cooking plate comprises at least one flange (66) of material different from that of the seal (6) which is disposed above or on said seal (6), at least a portion of the outer surface (61) of said seal (6) which is located between the outer surface (21) of said base plate (2) and the surface outer (51) of said window (5) being covered by said flange (66).

17. A method of manufacturing a cooking plate (1) according to any one of claims 1 to 15, characterized in that said base plate (2), said window (5) and said flange (66) are arranged in a mold which is then closed and in that a synthetic material is then injected into a mold cavity (92) to form said seal (6).