阅读说明：本技术 微波反射面板、包括这种面板的元件和元件的获取方法 (Microwave reflecting panel, element comprising such a panel and method for obtaining an element ) 是由 B.科尔赫布 S.加斯尼尔 于 2019-05-28 设计创作，主要内容包括：本发明涉及一种用于玻璃制品的面板(1),所述玻璃制品包括刚性的支撑件(2),所述支撑件对可见光范围的辐射基本透明并包括至少一个表面(3、4)和一个或多个边缘(8、9、10、11),所述至少一个表面(3、4)包括外围(7),所述面板(1)包括在所述至少一个表面(3、4)上伸展的金属织物(5)。本发明还涉及一种包括这种面板(1)的玻璃制品,涉及一种用于封闭包括这种玻璃制品的热处理箱的封闭器件,涉及一种包括这种器件的使用微波的热处理装置,以及涉及制造面板(1)、玻璃制品、密封器件和热处理装置的方法。(The invention relates to a panel (1) for a glazing comprising a rigid support (2) substantially transparent to radiation in the visible range and comprising at least one surface (3, 4) and one or more edges (8, 9, 10, 11), said at least one surface (3, 4) comprising a periphery (7), said panel (1) comprising a metal fabric (5) extending over said at least one surface (3, 4). The invention also relates to a glazing comprising such a panel (1), to a closing device for closing a heat treatment box comprising such a glazing, to a heat treatment apparatus using microwaves comprising such a device, and to methods of manufacturing a panel (1), a glazing, a sealing device and a heat treatment apparatus.)

1. A panel (1) for a glass article comprising a rigid support (2) substantially transparent to radiation in the visible range and comprising at least one surface (3, 4) and one or more edges (8, 9, 10, 11), said at least one surface (3, 4) comprising a periphery (7), characterized in that said panel (1) comprises a metal fabric (5) stretched over said at least one surface (3, 4).

2. The panel (1) according to claim 1, wherein the percentage stretch in the weft and/or warp direction of the stretched metal fabric (5) is between 0.01% and 5% with respect to the resting state of the metal fabric (5).

3. The panel (1) according to any of the preceding claims, wherein the metal fabric (5) is stretched under a tension of 5 to 25 newton.

4. The panel (1) according to any one of the preceding claims, wherein the metal fabric (5) is fixed on all or part of the periphery (7) of the at least one surface (3, 4) of the support (2) using fixing means (6).

5. The panel (1) according to any of the preceding claims, wherein the stretched metal fabric (5) comprises square meshes having a warp distance w and/or a weft distance w' of 120 to 220 μm.

6. A glass article comprising at least one panel (1) according to any one of claims 1 to 5.

7. A closing means for closing a heat treatment box, comprising a glass article according to claim 6 and a frame fixed on and/or around the glass article, the frame being in electrical contact with the metal fabric (5) and the frame comprising or cooperating with hinge means allowing the closing of the heat treatment box.

8. A heat treatment apparatus using microwaves, comprising: a heat treatment chamber and a closure device according to claim 7.

9. A method of manufacturing a panel (1) according to any one of claims 1 to 5, comprising the steps of:

using a rigid support (2) which is substantially transparent to radiation in the visible range and comprises at least one surface (3, 4), a periphery (7) and one or more edges (8, 9, 10, 11),

-using a metal fabric (5) in a resting state, -stretching the metal fabric to transform it from the resting state into a stretched state, and-keeping the metal fabric stretched,

-fixing the metal fabric (5) kept stretched on all or part of the at least one surface (3, 4) using fixing means (6) to keep the metal fabric stretched on the at least one surface (3, 4).

10. The method according to claim 9, wherein the step of stretching the metal fabric (5) is carried out by traction in the weft and/or warp direction, the stretching of the metal fabric (5) being in the range of 0.01 to 5% with respect to the rest state.

11. The method according to any one of claims 9 to 10, further comprising the step of: -fixing one or more separator elements on the metal fabric (5), said one or more separator elements defining a plurality of zones of the stretched metal fabric (5); and cutting the stretched metal fabric (5) along a separator.

12. A method for making the glass article of claim 6, comprising the steps of:

with a panel (11) manufactured by implementing the method according to any one of claims 1 to 11,

one or more of the covers are employed or manufactured,

one or more plates having the same dimensions and/or characteristics and/or properties as the support (2) are used or manufactured,

covering with the one or more covers, with the one or more panels, or simultaneously with the one or more covers or the one or more panels: a) all or part of said metal fabric (5); or b) all or part of one or more surfaces (3, 4) of the support (2) not covered by the metal fabric (5); or both a) and b), the one or more covers being arranged or superposed adjacent to each other, the one or more panels being arranged or superposed adjacent to each other, or the one or more covers being arranged or superposed adjacent to the one or more panels, the one or more covers being arranged on the one or more panels, or vice versa, the one or more panels being arranged on the one or more covers.

13. A method for manufacturing a closure means for a thermal treatment enclosure according to claim 7, comprising the steps of:

with a glass article manufactured by implementing the method according to claim 12,

by adopting the frame, the utility model has the advantages that,

-fixing the frame on the glass article at or on the position of fixing means (6) for fixing the metal fabric (5) on the support (2) and/or at or on the position of one or more edges (8) of the support (2), so that the frame is in electrical contact with the metal fabric (5).

14. A method for manufacturing a heat treatment apparatus using microwaves, comprising the steps of:

by adopting the cooking box, the cooking box is adopted,

with a closure device manufactured by implementing the method according to claim 13,

connecting the closure device to the cooking chamber.

Technical Field

The present invention relates to a microwave absorbing and/or reflecting panel, a glazing and a closure device for ovens with microwaves comprising such a panel, and a method for obtaining such a panel, such a glazing and such a closure device.

Background

Microwaves are electromagnetic radiation and are widely used in industry in many technical fields. In the field of household appliances, in particular heat treatment devices (for example ovens), they are also used daily by professionals or by individuals.

There are so-called "microwave" ovens, because they use only microwave radiation to rapidly heat and cook food, and so-called "hybrid" or "combination" ovens, because they use microwaves and one or more other heat generating sources, such as electrical resistance or infrared sources, as opposed to so-called "traditional" ovens that use only one type of heat source, such as natural gas or electricity.

Ovens using microwaves generally comprise a cooking chamber, which limits the radiation, and a closing device for closing an opening through which the product to be heat-treated is placed in the oven, the opening of the closing device comprising or generally being a door, able to limit or even prevent the microwaves from leaking out of phase. Typically, the door includes glass that is nearly opaque or opaque to microwaves through the use of a covering.

In general, covering devices for glass comprise or consist of a network of conductors forming a mesh, which has the advantage of maintaining a certain optical transparency in the visible range and a certain opacity to microwaves. The mesh size of such a network is typically between 1 and 2mm, which represents 10% of the wavelength of the microwaves used in the oven, which for most ovens is typically fixed at a frequency of 2.5GHz, the microwaves used in the oven have a wavelength of 12 cm. This allows reflecting about 90% of the microwaves generated in the oven's box.

The covering means may be a metal grid, fixed to the metal part of the frame of the door of the microwave oven using enamel or paint, as described in document DE 3714122; covering means or metal mesh arranged between the outer pane and the inner pane, the spaces being connected using silicone or expanded metal plates obtained by shearing the metal plates with stretching, to form a metal mesh with a hexagonal or rhomboid pattern, as described in document JP 2005273977; the covering device is either a metal fabric woven with conductive wires, as described in document US 2018054860.

The shielding means can also be a network of conductors obtained by screen printing on a glass carrier and covered with a transparent or coloured protective enamel layer coated with a conductive layer and transparent from an optical point of view, as described in document FR 2484397.

Even if the glass article of a microwave oven is substantially transparent to light in the visible range, this transparency is greatly reduced by the presence of the microwave-resistant shield (i.e., the metal grid) and it is difficult for the user to easily view the interior of the oven's oven cabinet. Moreover, such glass articles not only present an unsightly appearance, but also give the meaning of a "microwave oven" comprising such glass articles, which may be negative for some users, in particular for combination ovens.

However, in order to provide excellent visibility to the user and to reduce the microwave radiation of such a combination oven, GB2322276 describes the use of a metal mesh that reflects microwave energy in combination with a plastic film that absorbs microwave energy.

Disclosure of Invention

It is an object of the present invention to provide a microwave absorbing and/or reflecting panel, a glazing comprising such a panel, and methods of manufacturing such a panel and glazing, which do not have the disadvantages of the prior art.

The present invention aims to provide an alternative to the state of the art solutions.

It is an object of the present invention to provide a microwave absorbing and/or reflecting panel and a glazing comprising such a panel, the final aesthetic appearance of which is improved.

It is also an object of the present invention to provide a method for manufacturing panels and glass articles, in particular for ovens, which is fast and easy to implement.

The present invention relates to a panel for a glazing comprising a rigid support being substantially transparent to radiation in the visible range and comprising at least one surface comprising a periphery and one or more edges, wherein the panel comprises a metal fabric stretched over at least one surface.

According to a preferred mode of the invention, the panel according to the invention comprises at least one or any suitable combination of the following features:

-a stretched metal fabric having a percentage of stretch in the weft and/or warp direction of between 0.01% and 5% with respect to its "resting" state,

-the metal fabric is stretched under a tension of 5 to 25 newton,

-fixing the metal fabric on all or part of the periphery of at least one surface of the support using fixing means,

-the stretched metal fabric (5) comprises a square mesh with a warp and/or weft pitch w' of 120 to 220 μm.

The invention also relates to a glazing comprising at least one panel according to the invention.

The invention also relates to a closing means for closing a heat treatment chamber, comprising a glazing according to the invention and a frame fixed on and/or around the glazing, the frame being in electrical contact with the metal fabric, and the frame comprising or cooperating with hinge means to allow closing of the heat treatment chamber.

The invention also relates to a heat treatment apparatus using microwaves, comprising a heat treatment chamber and a closure device according to the invention.

The invention also relates to a method of manufacturing a panel according to the invention, the method comprising the steps of: employing a rigid support that is substantially transparent to radiation in the visible range and that includes at least one surface, a periphery, and one or more edges; using a metal fabric in a "rest" state, stretching it to change it from the "rest" state to a "stretched" state and keeping it stretched; the metal fabric, which is kept stretched, is fixed to all or part of said at least one surface by means of fixing means in order to keep the stretch on this surface.

According to a preferred embodiment of the invention, the method of manufacturing a panel according to the invention comprises at least one or any suitable combination of the following features:

-a step of stretching the metal fabric in the weft and/or warp direction, the stretching of the metal fabric being in the range of 0.01 to 5% with respect to the "resting" state,

-the method further comprises the steps of: securing one or more separator elements to the metal fabric, the one or more separator elements defining a plurality of regions of the stretched metal fabric; and cutting the stretched metal fabric along the separator.

The invention also relates to a method for manufacturing a glass product according to the invention, comprising the following steps: a panel manufactured by implementing the method of manufacturing a panel according to the present invention is employed; employing or making one or more covers; using or manufacturing a plate having the same dimensions and/or characteristics and/or properties as the support; covering all or part of the metal fabric or all or part of or simultaneously covering both of one or more surfaces of the support not covered by the metal fabric with one or more coverings arranged adjacent or superimposed with respect to each other, one or more panels arranged adjacent or superimposed with respect to each other, or one or more coverings arranged adjacent or superimposed with respect to the one or more panels, the one or more coverings being arranged on the one or more panels, or vice versa, the one or more panels being arranged on the one or more coverings.

Furthermore, the invention relates to a manufacturing method for manufacturing a closure device for a heat treatment cabinet according to the invention, comprising the following steps: a glass article manufactured by implementing the method for manufacturing a glass article according to the present invention; the frame is used to secure the frame to the glazing article at or over a securing means which secures the metal fabric to the support and/or one or more edges of the support, such that the frame is in electrical contact with the metal fabric.

The present invention also relates to a method of manufacturing a heat treatment apparatus using microwaves, comprising the steps of: adopting a cooking box; a closure device manufactured by implementing the manufacturing method of the closure device according to the present invention is employed; and attaching the closure device to the tank.

Drawings

Fig. 1 is a schematic illustration of a side view of a panel according to the present invention.

Fig. 2 is a schematic illustration of a top view of a particular embodiment of a metal fabric in stretched form according to the invention.

Detailed Description

In the rest of the description and claims, the term "length" is used to describe the largest measurement of one side of any geometric shape, such as the large radius of an ellipse, the base or height of a triangle, the length of a trapezoid or rectangle. The term "width" is used to describe the smallest measurement, such as the minor radius of an ellipse, the base or height of a triangle, the width of a trapezoid or rectangle, and the terms "length" and "width" may be used interchangeably, such as to indicate the radius of a disk, the measure of the side of a square.

As shown in fig. 1, the terms "front", "rear", "upper" and "lower" refer to the normal positions of the panel and its constituent elements according to the invention.

The panel 1 according to the invention comprises a support 2 which is rigid and substantially inflexible. It has a mechanical resistance to bending and/or torsional stresses sufficient to resist the action of bending and/or torsional forces without deforming.

The support 2 has a suitable shape, thickness and dimensions and is adapted or compatible with the end use of the panel 1 or an element comprising such a panel 1

The support 2 comprises at least one continuous and substantially flat upper surface 3, and preferably also a continuous and substantially flat lower surface 4 opposite the upper surface 3 (fig. 1).

Preferably, the support 2 has a transverse section in the XZ plane, and therefore in the plane formed by the surface 2 or the surface 3, of a circle, ellipse, polygon, trapezoid or quadrilateral, advantageously of a rhombus, square or rectangular section. Preferably, the support 2 has a longitudinal section in the XY plane and/or a transverse section in the YZ plane perpendicular to the plane formed by the surface 2 or the surface 3, which is circular, oval or polygonal, trapezoidal or quadrangular, advantageously square or oblong, trapezoidal or rectangular trapezoidal section.

The support 2 comprises at least a first lateral edge 8 and, in an embodiment having a transversal and/or longitudinal section (for example square or rectangular) of parallelepiped shape, the support 2 comprises a second lateral edge 9 opposite the first lateral edge 8, a front edge 10 and a rear edge 11 opposite the front edge 10.

The support 2 is made of an inert material, preferably at least thermally inert, advantageously also physically and chemically inert to the material(s) covering or contacting one or both of these surfaces 2 and 3.

The support 2 is preferably transparent or partially transparent in the visible range over its thickness and/or its width and/or its length. It may be sandblasted and/or screen-printed and/or coloured on a portion of one or both surfaces 3 and 4.

Preferably, the support 2 is made of or comprises plastic, glass, crystalline or semi-crystalline material, ceramic or glass-ceramic.

In a preferred embodiment of the invention, the support 2 is glass, preferably bulk clear or tinted soda-lime glass, optionally with various layers, such as an antibacterial layer, an antireflection layer, for example under the trademark mack @Of the known type, chrome-plated, with low emissivity, such as the type sold by AGC corporation under the name Planibel Clear or Planibel low-E IsoComfort, or of the type sold by AGC corporation under the name, for example33 known by the name borosilicate. Preferably, the glass has a high SContent of iO2, advantageously in the range 69 to 81% by weight, and a light transmission of up to 90%. The glass may optionally be pre-hardened, annealed, tempered or bent.

The panel 1 according to the invention comprises microwave-resistant shielding means comprising a metal fabric 5, the metal fabric 5 being fixed to all or part of the surface 3 or 4, preferably to both surfaces 3 and 4 of the support 2, the metal fabric 5 being in a constrained form. The metal fabric 5 is stretched over the surfaces 3, 4. It is in stretched form between the edges 8, 9, 10, 11 of the support 2.

Unlike the solutions of the prior art, in which the metal mesh or fabric, which acts as an anti-microwave screen, is placed on the support in a "resting" state, i.e. free or unstretched, according to the invention the metal fabric 5 is in the form of an elongation on the support 2. Even when it covers one or more surfaces 3, 4, it is continuously subjected to one or more tensile forces on the support 2.

Optionally, the metal fabric 5 may protrude from one or more edges 8 of the support 2 and may also cover it or them, but preferably in an unstretched form, thus in a resting (repos) state.

The panel 1 according to the invention thus has retained or improved blocking properties or microwave reflection, while at the same time the optical transparency in the visible range is improved.

The metal fabric 5 according to the invention is deformable, in particular it is elastically extensible. It has sufficient stretching capacity to allow it to pass from a "rest" condition, when not mounted on the support 2, to a "stretched" condition once it covers one or more surfaces 3, 4. It also has an elasticity that allows it to at least partially recover its shape and size after losing extension. The metal fabric 5 is therefore stretched by its elasticity on the support 2 and is subjected to a pulling force within the panel 1 resulting from the tendency of the metal fabric 5 to return to its rest state.

Preferably, it has a Young's modulus in the range of 190 to 230 GPa.

Preferably, it is obtained by weaving metal wires or fibers, or wires or fibers covered with metal, fibers made of one or more metals or one or more suitable metal alloys, or fibers comprising one or more metals or one or more suitable metal alloys, the metals advantageously being selected from silver, chromium, platinum, copper, stainless steel, alloys thereof or mixtures thereof.

The metal fibers may have a diameter d of the warp threads, a diameter d ' of the weft threads, and a diameter d ' and d ' of the weft threads, which may be the same or different between the weft threads, a warp thread pitch distance w, and a weft thread pitch distance w ', w and w ' which may be the same or different between the weft threads and the warp threads.

The metal fibers may be interwoven in any suitable weave, such as a plain, twill or satin weave.

Preferably, in the panel 1, the metal fabric 5 is stretched from 0.01 to 5% from its rest state. The tension exerted on the metal fabric 5 to perform this stretching also depends on the nature of the threads constituting the metal fabric 5, its stretching capacity and its elasticity, and therefore on the stretching capacity and overall elasticity of the metal fabric 5.

Preferably, it is stretched in at least one direction, advantageously in all directions, i.e. for a substantially square or rectangular metal fabric 5, in its width or weft (plane Z-Z ' of fig. 1), in its length or warp (plane XX ' of fig. 1), but preferably not in its thickness (plane YY ' of fig. 1). Since the metal fabric 5 can take a shape identical or compatible with the shape of the panel 1, the metal fabric 5 is stretched and kept stretched over one or more surfaces 3, 4 of the support 2 in all directions of its width and length, whatever its shape.

It can be provided that the metal fabric 5 is stretched differently on its surface 3, 4 and therefore on the plane in which it is formed (i.e. the XZ plane), for example according to a first stretching level for one or more portions of its periphery, with its central portion being unstretched or not stretched according to a second stretching level, which is lower than the first stretching level. However, and preferably, it is uniformly stretched over its entire surface from its central portion to its periphery.

The shape of the openings or meshes of the metal fabric 5 stretched in the panel 1, as well as its size or dimensions w and w' in stretched form, are chosen according to the type of microwave to be absorbed or reflected. Preferably, the metal fabric 5 has the same mesh shape in its stretched state as in its rest state. However, it is possible to envisage deformation of the mesh between these two states, obtained by a difference in stretch in its width and/or length.

Preferably, the mesh is stretched in the range of 50% to 100%, i.e. the dimension w and/or w' of the mesh is 1.5 times or twice the dimension of the metal fabric 5 at rest.

The stretched mesh may be a rectangular or diamond mesh, but is preferably square, as such a mesh makes it possible to obtain the most aesthetic and uniform transparency of the panel 1 and the devices it comprises.

Preferably, the metal fabric 5 at rest comprises square meshes of sizes w and w' in the range of 60 to 100 μm. Preferably, the metal fibers are made of stainless steel having the same diameters d and d' (and in the range of 200 to 300 μm). Preferably, the percent open is 35% to 50% and has a fineness in the range of 30 to 120 mesh/inch, i.e., 30 to 120 mesh per 25.4 mm. The stretched metal fabric 5 comprises square meshes (fig. 2) with dimensions w and w' in the range of 120 to 220 μm. Preferably, the diameters d and d' of the metal fibers are the same, in the range of 50 to 100 μm.

Preferably, the tension applied to the metal fabric 5 to stretch it and keep it stretched on the support 2 is between 5 and 25 newton.

For example, the metal fabric 5 according to the present invention has a fineness of about 43 mesh/inch (43 meshes per 25.4 mm), has 46% openings, and includes square meshes having a warp size d and a weft size d 'of about 160 μm, formed of stainless steel wires having a warp diameter w and a weft diameter w' of about 70 μm.

The metal fabric 5 in stretched form is fixed on one or more surfaces 3, 4 in a continuous or discontinuous manner by fixing means 6, which are adhesives or glues, compatible with the properties of the metal fabric 5, the support 2, the final device incorporating the panel 1 according to the invention and its end use. Preferably, it is a glue with good electrical resistance at high temperatures of about 250 ℃. It may be single component silicone adhesive, or acetic acid or neutral silicone adhesive.

The metal fabric 5 is preferably fixed on all or part of the periphery 7 of one of the surfaces 3 or 4 (fig. 1), preferably a few millimetres, for example 5 to 25mm, from the edge 8 of the support 2, also on one or more edges 8, if desired. This has the advantage of making the glue sites or glue areas of the metal fabric 5 invisible in the final device incorporating the panel 1 according to the invention.

The panel 1 according to the invention is preferably used in the field of household appliances, advantageously as glazing for household or professional household appliances, even more advantageously as glazing for doors of microwave ovens or combi ovens.

The glazing according to the invention comprises a panel 1 according to the invention, which may also comprise one or more coverings or films, overlapping each other or arranged adjacent to each other, covering the metal fabric 5 and/or all or part of one or more surfaces 2, 3, or the part of the surface 2, 3 of the support 2 not covered by the metal fabric 5, preferably in addition to the metal fabric 5 protruding from one or more edges 8 of the support 2.

The cover or film is of sufficient size and thickness, and preferably has particular properties, which advantageously depend on the end use of the glass article or the device or device comprising the glass article. It may be a protective covering, preferably a thermal protective covering and/or a condensation-preventing covering.

The panel 1 may also comprise a transparent plate or sheet having the same properties, the same features and dimensions as those forming the support 2, arranged on the metal fabric 5, on a covering the metal fabric 5 and/or on one or more surfaces 3, 4 of the support 2.

Thus, if the metal fabric 5 covers only one of the surfaces 3 or 4 of the support 2, the other surface may be covered by one or more coverings arranged adjacent to or on top of each other, or by one or more plates arranged adjacent to or on top of each other, or by both one or more coverings and one or more plates (wherein the one or more plates are arranged adjacent to or on top of each other with respect to the covering, or the one or more coverings cover the one or more plates).

If the metal fabric 5 completely covers one or both surfaces 3, 4 at the same time, a first or first series of coverings or a first or first series of panels can cover the entire metal fabric 5, the one or more coverings being able to penetrate the web of the metal fabric 5, and a second or second series of coverings or a second or second series of panels being able to cover the first or first series of coverings or the first or first series of panels. Thus, the glass article may be a multilayer product comprising an alternation of coverings and sheets, or one or more coverings on one or more sheets, or conversely, one or more sheets on one or more coverings.

If the metal fabric 5 partially covers one or both surfaces 3, 4 at the same time, the one or more covers or the one or more plates may cover the metal fabric 5 or surfaces 3 and/or 4 that do not include the metal fabric 5, or both. If the first or first series of coverings, or the first or first series of panels, covers only a portion of the metal fabric 5, the second or second series of coverings, or the second or second series of panels, may cover the remainder of the metal fabric 5, as well as the first or first series of coverings, or the first or first series of panels, as the case may be. A third or third series of covers, or a third or third series of panels, may also be provided to cover all or part of the first and/or second series of covers and/or panels.

The panel 1 according to the invention is preferably used as a closing means for closing a heat treatment cabinet, for example as a door of a microwave oven or a combination oven.

The closure device according to the invention comprises a glazing according to the invention and comprises a frame, which is in one piece or made of an assembly of frame elements, which is fixed on or around the glazing, and which comprises or cooperates with hinge means allowing the closure of the heat treatment chamber. The frame has all the shapes and dimensions suitable for the box it is to close, the glazing according to the invention and the panel 1.

Preferably, the frame is positioned at a level where it preferably covers the fixing means 6 for fixing the metal fabric 5 on the support 2, and therefore the periphery 7 of one of the surfaces 3 or 4 of the support 2, which has the advantage of making the fixing means 6 invisible. The frame may also cover one or more edges of the glazing, and thus one or more edges 8 of the panel 1, optionally including one or more portions of the metal fabric 5 protruding from the support 2.

The frame is made of or comprises all materials compatible with its end use, in particular with its use as oven door.

Preferably, the frame is in electrical contact with the metal fabric 5, at least with the portion thereof covering the one rear plurality of surfaces 3, 4 and/or with the portion thereof protruding or covering one or more edges 8 of the support 2. Such electrical contacts have the advantage of dissipating microwave radiation.

The heat treatment device according to the invention comprises a cooking chamber and a closure means according to the invention. Preferably, it is a so-called microwave oven or a hybrid oven.

The invention also relates to a method of manufacturing a panel 1 according to the invention.

The method comprises the step of using or manufacturing the support member 2 and the metal fabric 5 as described above.

Preferably, the metal fabric 5 is placed in its rest state on a table provided with stretching means, for example a table provided with jaws on its entire periphery, and the fabric is fixed in these stretching means.

The metal fabric 5 is elongated in at least one direction, preferably in all directions (i.e. along its length and/or width) and is kept in a stretched state, preferably 0.01-5% stretched with respect to its resting state.

Preferably, the stretching of the metal fabric 5 is obtained by applying a force of 5 to 25 newton.

The method may further comprise fixing one or more separator elements to the metal fabric 5 such that at least one area (preferably a plurality of areas) of the stretched metal fabric 5 and its cutting along the one or more separators can be defined. This has the following advantages: the portions of stretched metal fabric 5 are arranged and their handling is thus facilitated to carry out the other steps of the method.

The size and dimensions of the separator depend on the size and dimensions of the support 2 and therefore of the panel 1.

The method comprises the following steps: with or in the manufacture of a support 2 as described above, the fixing means 6 are placed on all or part of the periphery 7 of one of the surfaces 3 or 4, preferably a few millimetres from the edge 8 of the support 2, and also on one or more edges 8 if desired. Preferably, the application of the fixing means 6 uses a pneumatic gun, which has the advantage of obtaining precision and of obtaining a better uniformity of the fixing means 6 on the surfaces 3, 4.

The stretched metal fabric 5, or a part thereof, provided with its separator element or elements, is placed in contact with the support 2 provided with the fixing means 6. Preferably, the stretched metal fabric 5 or one of these parts is placed on the support 2. Advantageously, a pressure is exerted on the metal fabric 5 so that the fixing means 6 penetrate and preferably pass through the meshes.

The method further comprises the step of removing one or more separator elements from the stretched metal fabric 5.

The method may further comprise the step of cutting the metal fabric 5 protruding beyond the edge 8 of the support 2, preferably with a margin with respect to said edge 8, depending on the end use of the panel of the invention. For example, for a microwave oven glazing, the allowance would be about 5 to 25 mm.

The method for manufacturing a glass product according to the present invention comprises the steps of: the panel 1 according to the invention is used or manufactured, preferably the panel 1 is manufactured according to the above-described method; a step of taking or making one or more coverings or films and or one or more plates or sheets transparent, having the same dimensions or characteristics or the same properties as the support 2; a step of covering all or part of the metal fabric 5 and/or all or part of one or more surfaces 3, 4 of the support 2 not covered by the metal fabric (5) with said one or more coverings or said one or more plates.

Thus, if the metal fabric 5 covers only one of the surfaces 3 or 4 of the support 2, the other of 3 or 4 may be covered by one or more coverings arranged adjacent to or on top of each other, or by one or more plates arranged adjacent to or on top of each other, or by both one or more coverings and one or more plates (wherein the one or more plates are arranged adjacent to or on top of each other with respect to the covering, or the one or more coverings cover the one or more plates).

If the metal fabric 5 completely covers one or both surfaces 3, 4 at a time, it is possible to cover it completely or entirely with a first or first series of coverings or a first or first series of panels, preferably outside the metal fabric 5 beyond the edge 8 of the support 2, and then cover the first or first series of coverings or the first or first series of panels with a second or second series of coverings or one or more other panels, so as to obtain a multilayer product comprising a series of covering layers or a series of panels, or an alternation of covering and panel, or one or more coverings on one or more panels, or conversely, one or more panels on one or more coverings.

If the metal fabric 5 partly covers one or both surfaces 3, 4 at a time, it may be covered with one or more coverings or one or more plates and/or cover the surfaces 3, 4 not covered by the metal fabric 5. If the first or first series of coverings or the first or first series of panels only covers a part of the metal fabric 5, the remaining part of the metal fabric 5 can be covered by means of a second or second series of coverings or a second or second series of panels, or if desired also the first or first series of coverings or the first or first series of panels. A third or third series of covers or a third or third series of panels may also be used to cover all or part of the first series and/or second series of covers and/or panels.

Application of the cover, film, sheet or sheet may be by any suitable method.

The method for manufacturing a closure device for closing a door of a heat treatment cabinet, in particular a microwave oven or a hybrid oven, comprises the following steps: using or manufacturing a glass article according to the invention, preferably according to the above method; using or manufacturing a frame, which is one-piece or formed by assembly of frame elements; and fixing the frame on the glazing, preferably at or on the position of the fixing means 6 fixing the metal fabric 5 on the support 2 and/or at or on the position of one or more edges of the glazing. Preferably, the method further comprises the steps of: the hinge element is employed or manufactured and secured to the frame before or after the frame is mounted on the glazing.

The manufacturing method of the heat treatment device comprises the following steps: adopting or manufacturing a microwave cooking box; use or manufacture of a closure device according to the invention, preferably by the method described above; and connecting the closure device to the tank.