FR2532300A1 - GLASS AND / OR VITROCERAMIC SHEET SYSTEM PROVIDING PROTECTION AGAINST MICROWAVE RADIATION - Google Patents

Abstract

GLASS AND VITRO-CERAMIC LAMINATED SYSTEM PROVIDING PROTECTION AGAINST MICROWAVE RADIATION. THE MICROWAVE PROTECTION SHEET SYSTEM CONTAINS, BETWEEN AT LEAST ONE SUPPORT PLATE 1 AND A GLASS AND CERAMIC COVERING PLATE 4, A METAL SCREEN 2 IMPERMEABLE TO MICROWAVE, GLUED TO THESE PLATES, L 'METAL SCREEN EXCEEDING THE LAMINATED SYSTEM SO THAT IT CAN BE ASSEMBLED TO AN EXTERNAL FRAME IN A MICROWAVE-TIGHT MANNER. THE INVENTION FINDS ITS MAIN APPLICATION IN THE MANUFACTURE OF INDICATORS FOR MICROWAVE OVEN.

Description

The invention relates to laminated glass and / or

  glass-ceramic, intended to provide protection against microwave radiation, with metallic screen

  microwave-based systems, which are advantageously

  partially transparent and also

  look at the premises where there are micro-

waves.

  Windows and doors for reception rooms are already known.

  microwaves, consisting of a plurality of plates (two or more) separately arranged in glass or plastic and which contain a microwave shield, which is arranged in the form of a fine wire mesh.

  mesh or a suitable sheet or metal sheet

  It is for example according to this principle that the windows or doors of the microwave ovens used in home economics are constructed. Their constituent elements are combined with each other by means of auxiliary elements. as for example spacer frames and clamping frames, so that no microwave radiation can escape from the interior of the oven By loosening or unscrewing the auxiliary elements, it is possible to restart these windows and

  doors in their constituent elements.

  Laminated glass windows are also known which, in their generally used form, do not, however, provide any protection against microwaves. In the simplest case, these laminated glass windows consist of two glass plates glued together. to the other, over their entire surface, by a transparent intermediate layer in one

  viscoelastic plastic material The layer of plastic material

  that can be an appropriate adhesive sheet or be

  composed of resins which, together with a hardener, can

  may be brought into the intermediate space between the plates. Laminated glass plates of this type are used, for example, as safety glazing in

motor vehicles.

  Multiple glazings, which consist of several alternating layers of glass and plastic, are used as burglar-proof or impact-resistant plates and are also used in aircraft construction. Laminated glasses having a metal frame, glasses in the intermediate layer are also known.

  (Of plastics> of which are inserted

  Such purposes, for example, used for electric heating of glazings, or which are also inserted into the circuit of burglar-proof devices. Such laminated glasses, with embedded wires, are not suitable in their known form. to protection

against the microwaves.

  Armored lenses having a network of relatively large mesh wires which is directly melted in the glass are also known. This "reinforced glass is not suitable,

  him either, to the protection against the microwaves.

  Finally, we know assembly techniques for

  glass or glass ceramic, with frames or fasteners assembled together by means of

  adhesives with permanent elasticity.

  Windows and doors mentioned above, intended for protection against microwaves and belonging to the state

  current state of the art, present a whole range of

  the wire mesh or the sheet or perforated metal sheet used for protection against radiation is installed in the form of a separate part between at least two plates which, for reasons of strength, must be of sufficient thickness It is common to have, for example, two sheets of float glass, tempered 4 to 5 mm thick. This results in the disadvantage of excessive weight for the windows, and in particular the fact that it is necessary to , for this type of window arrangement, special and heavy frame systems, in which one inserts

  separately, at an excessively high installation cost.

  The various glazings between which, possibly with the aid of frames or additional spacer pieces, are installed, in a mechanically removable manner, the protective means that are, for example, the wire mesh, the perforated sheets. or perforated sheets

  in accordance with the specifications of the watertightness

  microwaves, this insertion is done in a geometrically exact manner, with sufficient overlap and / or contact pressure on the metal parts of the frame Another disadvantage lies in the fact that the vision through the light described here above, provided with a protection against microwaves and belonging to the state of the art is strongly influenced by the scattered light created at the level of the perforated sheet, the network of metal wires or the perforated plate As a result, the light is optically less transparent than would be expected from the screen

  metal inserted into the glazing of the window.

  The invention aims to create lights or windows

  transparencies for rooms in which microwaves

  waves, lights which, for good optical transparency and low weight, offer maximum protection against microwaves; which, as firmly bonded composites, are essentially unbreakable 4 which are optionally provided with means to facilitate inexpensive assembly

  that they are advantageously assembled in a

  vible using a frame element; and which, in special embodiments, are also suitable for use in premises in which microwaves prevail and which, simultaneously, are heated to high temperatures These lights and windows must furthermore offer, in case of breakage of the This objective is achieved by the laminated glass and / or glass-ceramic systems of the type described above, characterized in that they contain, between at least two glass plates, glass, a high security against the passage of microwaves. and / or glass-ceramic, a metal screen, impervious to microwaves, which is stuck in an irremovable manner to these windows by means of a

  viscoelastic mastic and / or having a permanent elasticity

  and in that this metal screen is pulled out of the laminated system outwardly so that it can be assembled to the frame and / or the metal fixing means

  neighbors in a manner impervious to the passage of microwaves.

  As the microwave shield, perforated metal foils, narrow mesh wire mesh suitable for the intended use, or printing one of the two plates can be used in combination with one another. metal preparation, for example of

  the conductive silver, which is baked on the glass plate.

  Preferably, the laminate mentioned above is also

  glued to frames that are adapted to the conditions of

  very particular indicator in the premises receiving microwaves. In a first embodiment of the invention, the indicator is manufactured in the form of a composite bonded over its entire surface, the two plates of the laminated composite being bonded to one another by a layer of a material transparent and viscoelastic plastic in which is incorporated the metallic protection against microwaves,

  protection that protrudes from the laminate, all around its

  the conditions of protection against microwaves and of sufficient width to be able to make electrical contact on all sides with

  pa 7 months from the local receiving microwaves.

  According to a second embodiment of the invention, which is particularly suitable for high temperature applications, the indicator consists of glass plates with

  borosilicate or glass-ceramics with a low

  longitudinal thermal insulation, plates that are not glued

  between them, and on the screen of protection against micro-

  waves for forming the laminate, on their edge, with silicone rubber adhesives, having a

  permanent elasticity and resistance to temperature

  the layer of the silicone adhesive is then chosen so that the different thermal expansions of the plates and the microwave shield (metal foil or wire mesh) are compensated by means of the elastic deformation of the silicone adhesive According to the application example, the composites or LEDs described above are, in other embodiments of the invention, glued to metal frames and / or plastic, these frames that can simultaneously serve as auxiliary means for the realization of the laminates of the embodiments mentioned above is obtained window units or door ready to be embedded, and

  possessing protection against microwaves.

  If it is not possible to use glued frames, we will use, in their place, frames' possessing means

  clamping the windows of the

  with an integrated protection screen against

microwave.

  The invention will be better understood with regard to the examples

  below and the accompanying drawings (Figures 1 to 14), which represent

  see examples of embodiments of the invention.

Example 1

  Figure 1 shows, in section, a laminated glazing with microwave protection according to the first embodiment described above (in this figure and on the following, the thickness of the intermediate layer of plastic material has been greatly enlarged, for clarity in

  the current state of the art, this thickness is generally

  very low, eg 0.1 mm on both sides of the

  the metal screen against microwaves)

  tection 2 against microwaves, which may be for example

  consisting of a thin sheet of aluminum in which a.

  perforation frame has been stamped or engraved, is placed

  on the carrier plate 1 Protection against micro-

  wave 2 is covered with a cover glass plate 4,

  whose edges are shorter than the corresponding edges

  In this way, the protective sheet is free all around the plate, the free zone being in the form of a strip whose width

  is adapted to the conditions of protection against micro-

  In this zone, the protective sheet 2 can be brought into contact with the parts of the metal frame of the window (not shown in FIG. 1), or it can encroach on them over a sufficient width, with a very large space. The carrier plate 1, the microwave protection sheet 2 and the cover glass plate 4 are glued to each other over their entire surface by means of a layer of viscoelastic plastic, the openings 3 of the perforated frame being entirely

filled with plastic material.

  Thanks to the immersion effect of the plastic material 5, which completely fills the openings 3 of the weft

  perforations of the sheet 2 of protection against micro-

  wave, we have a strong improvement in vision through laminated glass, compared to known windows whose partial objective a "better vision through" because the influence of the light scattered by the halftone disappears The fact of constituting the light in the form of a laminated glass plate in which is incorporated a metal screen microwave protection allows considerable savings in weight, up to% compared to the LED systems of the current state of the art, because the assembly can be done with plates preferably having a thickness of 1.5 to 2 mm In addition, a glued system has the same security as laminated glass panes, that is to say that, in the case of a break,

  debris is kept in the laminated case.

  Of course, the microwave protection sheet is retained as long as the sheet carrying the perforated weft is not penetrated. Moreover, the laminated glass plate 7-

  according to the description above has advantages during the

  because it can be embedded as simply and securely in the corresponding windows apertures as the single glass plates. This avoids the fact that the laminated glass plates according to the invention can not be in place that in a way

  predefined by the construction of the system, micro-leakage

  waves that may be encountered due to mounting errors

  in the windows and lights of the current state of the art.

Example 2

  In another embodiment of the invention, the protective properties of the laminate according to the invention against microwaves are obtained by applying to one of the two plates, in place of the protective metal sheet 2 of FIG. suitable metal frame, conducting silver or other metallic preparation, which

is cooked on this plate.

  Such a laminate is shown in FIG. 2. For example, a carrier grid 1 is applied to the carrier plate 1 and has a network grating 2 having openings 3, for example conducting silver, which serves as a protection against micro-waves. The carrier plate 1, which supports the screen, is oven-proof and protected against microwaves, is glued to the cover plate 4, over its entire surface, using the transparent plastic layer 5.

  other characteristics of this laminated assembly correspond to

  to those of the one presented in Example 1.

  As the protection against microwaves, in case of breakage of the carrier plate 1 and thus of the printed screen 2, would no longer be ensured, because the protection would then be defeated in several points, it is applied on the outer side of the carrier plate, by baking, metal conductive tracks 6 mounted in an electrical circuit which, in case of interruption of the conductive tracks 6, cut the source of microwaves and make impossible

  the replacement of the broken plate.

Example 3

  It is also possible, instead of using between the two outer plates perforated plate 2, metal, mentioned in Example 1 (Figure 1), to arrange a third plate, on which was printed and baked at furnace a perforated conductor silver frame or other suitable metal preparation providing protection against microwaves, the outer plates being adhered over their entire surface to the central plate supporting the

  protective weft, using a plastic visco-

  transparent elastic, so as to obtain a composite assembly

  This type of composite makes it possible to obtain the same properties

  than those described in Example 1.

Example 4

  In the context of a variant of the embodiment of the laminate according to Example 1 (FIG. 1), this laminated assembly can also be made in such a way that the metal protection sheet 2 carrying the perforated weft 3 exceeds the carrier plate 1 and the cover plate 4, as shown in FIG.

  plates 1 and 4, on their entire surface, on the sheet of

  tion 2, is also carried out here using a plastic material

  transparent tick 5, which makes it possible to obtain the same

  than those described in Example 1 -

  To manufacture the laminated systems according to Examples 1 to 4, with all-surface gluing and protection against microwaves, the carrier plate 1 is applied to

  a resin / hardener liquid mixture, it is uniformly

  mement and we embed in this coating for example the

  protective sheet carrying the perforated weft 2 (Figure 1).

  The openings 3 of the perforated weft sheet then fill completely with the resin / hardener mixture. Immediately thereafter, the sheet carrying the perforated weft is coated uniformly with the resin / hardener mixture, and the cover plate 4 is pressed in (FIG. 1). The laminated system thus obtained is cured under pressure at temperatures of 60 to 2001 C. As a result, the different parts of the laminated system stick firmly to each other.

over their entire surface.

  It is necessary to choose resin / hardener mixtures which, after hardening, remain viscoelastic so as to

  ensure, when heating the laminated system, a compensation

  differences in the dilation between the two glasses and

  the screen of protection against microwaves.

  For high temperature applications, the laminated systems described above can not be used because the plastic intermediate layers do not withstand high temperatures, for example 250 ° C. In the context of a variant of laminated systems described in Examples 1 to 4 and having a protection against microwaves, described below laminated systems that can be used at temperatures up to 3000 C In these laminated systems, we deliberately give up the bonding over the entire surface / and immersion effect of the intermediate layer of plastic, and-these laminated systems are glued on their edge by rubbers

  silicone having a permanent elasticity.

Example 5

  FIG. 4 shows an embodiment of a microwave protection light D for high temperature rooms and microwaves. The microwave protection foil, or a suitable wire mesh. or a perforated plate 2 is co'-lée, at its edges, with a silicone rubber 3 having a permanent elasticity, on a carrier plate borosilicate glass, glass-ceramic or float glass tempered 1 We stick on this arrangement a cover plate 4 borosilicate glass, glass-ceramic or float glass tempered, using the same silicone rubber 3, along its edge Between the plates 1-Set 4 and the protective sheet 2 is located of air whose or Verture 15 arranged in the bonding joint ensures the compensation of

  pressure with the environment Differences in linear expansion

  that occur during the heating of the composite system between the plates 1 and 4 and the metallic shielding against microwaves 2 are compensated by the deformation of the silicone rubber having a permanent hardness, whose layer thickness, two sides of the microwave protection, must be chosen at a value of not less than 1.5 mm For the reflection of thermal radiation, the carrier plate (when it serves as the outer plate of the

  laminated) can receive reflective layers.

  for example, Sn O 2 layers.

Example 6

  FIG. 5 shows another embodiment of the gluing of the laminated system with protection against microwaves and serving as a light that can be used for

high temperatures.

  In this embodiment, the cover plate 4, the microwave shield 2 and the carrier plate 1 are glued at one time to give a laminated plate by a plurality of bonding points 5 to the silicone rubber, passing to through the perforated weft 3 or by corresponding additional perforations 16 of

  the screen of protection against microwaves.

  Still within the scope of the invention, the laminated systems represented in the examples above and on the

  Figures 1 to 5, having a protection against micro-

  wave, are combined with appropriate frames to give a window tees that can be used as LEDs or doors with LEDs, ready to be embedded and sealed in the microwave, and used for closing of premises

  and spaces undergoing microwaves These examples are limited

  were essentially to the use of

  Figures 1, 4 and 5 can also be used.

  solutions on other laminated systems.

Example 7

  FIG. 6 shows a window providing microwave protection M-11, intended to be placed in openings of premises receiving microwaves, and using

  a laminated system according to Figure 1.

  The laminated plate, with the microwave protection system, which consists of the carrier plate 1, the protective sheet 2 and the cover plate 4 (which are glued to each other over their entire surface to 5) is glued against a metal flange 25 by means of an electrodonductive adhesive 7 and having a

  permanent elasticity This flange is provided with bores 8.

  The flange 25 is compressed in a micro-tight manner

  waves against the wall of the premises receiving the microwaves, using a metal frame 9 protruding from the carrier plate 1

  laminated metal frame supporting a bead of

  10 rubber peripheral device, and this via screws 11 which are screwed into the wall 12 of the receiving room

the microwaves.

Example 8

  In another embodiment according to Figure 7,

  the metal frame 9 is simultaneously used for the manufacture

  cation of the laminated plate: a first plate 1 is glued, which corresponds to the plate called "cover plate Ure" above, in a metal frame 9 using silicone rubber 7 is introduced the resin / hardener mixture 5 in

  _ the mold thus formed, and the sheet of protection

  2, then, after additional addition of the resin / de-icing mixture 5, the carrier plate 4 is inserted therein. After curing the resin / hardener mixture 5 at temperatures between 60 and 2007 C, a laminated system is obtained which provides protection against the microwaves according to Figure 1, which system with the frame 9 forms a unit It can be mounted for example as a lift window, by screws fixed in the wall of a local-receiving microwaves, or it can be used as an element of

base of a door.

  In the latter case, it is foreseen in the

  9 an A / 4 trap serving as a microwave barrier

  18, as shown in detail in Figure 7a.

Example 9

  Figures 8 to 12 inclusive show different possibilities of manufacturing glass doors with microwave protection, using laminated systems according to Example 1 and Figure 1, which can be used, for example, for oven doors. microwaves such as those

  used in home appliances.

  The sectional drawing of Figure 8 shows a door whose metal frame 9, having a microwave trap

  or trap A / 4 18, is welded or electrically bonded

  conductive to the protective sheet 2, to form a complete unit This unit is bonded, using a resin / hardener mixture 5, over its entire surface, on a carrier plate 1 preferably consisting of a glazing unit.

  float glass tempered, 4 mm thick

  logue, a thin float glass plate 4 is glued into the window opening of the frame 9 using the resin mixture /

  hardener in order to create a laminated system with

  against microwaves according to Example 1 or Figure 1, a system on which is bonded a frame 9 and which can be applied in the form of a door, by means of hinges 27, for example on the body outside of an oven

domesticated microwave.

  In the door with microwave protection shown in section in FIG. 9, a finished laminated system, such as that described in Example 1, is glued with a permanent elastic adhesive 7 in three points. 9 for this purpose, the frame 9 is provided with peripheral recesses 24 -in which is injected before mounting a bead of

the still plastic adhesive.

  Pressure is applied to the frame 9 provided with the adhesive

  sif 7 the laminated system, the carrier plate of which is preferably 4 mm thick tempered float glass. The metal protection sheet 2 of the system

  laminated is automatically put into electrical contact

  that in the zone designated by reference numeral 36 in Figure 9,

with the metal frame 9.

  In another embodiment, shown in section in Figure 10, the laminated system is bonded in a peripheral groove 22 to the metal frame 9 carrying the microwave trap 18, using a permanent elastic adhesive 7. A peripheral cord of silicone rubber 10 serves, on the inner edge of the frame, to seal and to

  support for the laminated system.

  FIG. 11 shows another type of bonding also, by combining a laminated system such as that described in Example 1 with a metal frame, a door element with microwave protection. The finished laminate is compressed on its small side, thanks to a frame

  peripheral metal hubcap 32, with the metal frame

  9, which is equipped with a microwave trap 18

  or a trap at X 0/4, and it is further stuck on any

  its periphery by a permanently elastic adhesive 7.

  Finally, Figure 12 shows a door with protection

  against microwaves, door that can be built simple-

  at a reasonable cost, thanks to the appropriate constitution of the metal frame and by

laminated over their entire surface.

  First a metal frame 9 having a peripheral microwave trap 18 and hinges 27 is applied to a first thin float glass plate 4 on the support provided for this purpose, by the rubber sealing bead, and the adhesive is adhered to. Microwave protection screen 2 in groove 37, with sufficient overlap Plate 1, hardened and 4 mm thick, is placed by

  above and glued on board to the frame 9 using rubber

  silicone rubber 7 with permanent elasticity Si; instead of the plates send float, use borosilicate glass plates or glass-ceramic plates and a suitable tack, this type of door can also withstand high temperatures up to 3000 C

Example 10

  Door for microwave oven for domestic use

  in which a laminated system according to Example 3 and Figure 3 is used, is shown in section in Figure 13 and in detail in Figure 13a is applied a first peripheral metal profile 44, with traps A / 4 18 and a sealing bead 10, on the laminated system

  finished with plates 1 and 4, including the protection sheet

  2 This profile is equipped with self-locking pliers 47 (see FIG. 13 a) which penetrate through bores in the protective sheet 2, which during application a second section 38 of metal or plastic, with a sealing bead 10, in the

  corresponding bores 30 having blockages 41, penetrate

  trent in this profile 38 This provides a solid framework

  in which is inserted the laminated system consisting of

  1 and 4 and the sealing sheet 2, the sealing sheet being in electrical contact with the profile

  of frame 44, by clamping with the clamps 47.

Example 11

  The last example (FIG. 14) represents a stack of plates, intended for doors of premises subjected to a high temperature and to microwaves, for example

  domestic cooking ovens A plate 1 glass boro

  silicate or vitroceramic is glued in a metal frame-

  32 is coated with an adhesive 7 resistant to high temperatures and permanently elastic This plate is applied to the protection against microwaves 2 and the whole is compressed on the seat 39, with the plates 4, 4 ', 4 "' and the spacing frame 9 The adhesive 7 j coated in large quantities, and still plastic, then passes through the openings of the system -15

  2 protection against microwaves and block in position.

  With a bead 40 surrounding the assembly, the stack of plates is held in place by being tightened by means of a clamping device until the curing of this bead is obtained. The stack of plates with protection system against microwaves is then tightened or screwed in a microwave-tight manner, by its bearing surfaces 40,

  on the other metal parts of the door.

  The embodiments presented above relate to

  to flat plates Of course, we can also conceive

  see other embodiments, with curved plates

  In other embodiments, the invention is not limited to the embodiments described above and shown, from which it may be possible to envisage other embodiments of the invention. fashions and other forms

  embodiment, without departing from the scope of the invention.

Claims (13)

claims   1 Laminated system made of glass and / or glass-ceramic, possibly with a frame and / or fixing means, characterized in that it contains, between at least two glass and / or glass-ceramic plates, an impermeable metallic screen   microwaves, which is stuck in an unfamiliar   to these plates by means of a viscoelastic and / or permanently elastic sealant, and in that this metal screen emerges from the laminated system so that it can be assembled in a microwave-tight manner to managerial staff   and / or metal fastening means attached thereto.   2 laminated system according to claim 1, characterized   in that the metal screen for protection against micro-   wave is a thin sheet with perforated weft, grid   being adapted to the service wavelength used.   3 laminated system according to claim 1, characterized   in that the metal screen for protection against micro-   waves is a network of narrow-meshed metal wires whose wavelength is adapted to the wavelength on duty.   4 laminated system according to claim 1, characterized in that the protection against icro-waves consists of printing, on one of the two plates of the laminated system, a perforated screen in metal preparations,   which is baked on this plate.   A laminated system according to any one of claims 1 or 4, characterized in that the plate of the embossed system lined with a perforated metal perforated screen and baked on the opposite side of the perforated screen other printed and baked conductive tracks, which, together with an auxiliary electrical circuit, provide protection for the space in which microwaves are located against commissioning in case of breakage plates.   Laminated system according to claim 1, characterized   in that one or more plates are, to ensure the pro-   against microwaves, provided with transparent layers electroconductive rents.   7 laminated system according to any one of the claims   1 to 6, characterized in that the plates of the laminated system are bonded to each other and to the microwave shield, over their entire surface, by a   visco-elastic transparent plastic material.   Laminated system according to any one of the claims   1 to 3, characterized in that the two plates of the laminated system and the microwave shield are glued along their edge to one another by a   permanently elastic adhesive, openings being   in the bead for aeration of the intermediate space between the plates, openings for the equalization of the pressure during heating of the laminated system.   9 laminated system according to any one of the claims   1, 7 or 8 characterized in that the microwave protection screen protrudes on all sides around the two plates of the laminated system according to Figures 1 to 6, in a width adapted to the particular requirements of the protection against microwaves.   Laminated system according to any one of the claims   1 to 3, and according to Figure 5, characterized in that the microwave protection screen is provided, in addition to a perforated frame, with larger bores or grooves (16) on its edge, through which a permanently elastic adhesive is applied to one of the two plates so that when the other plate is pressed against the first,   the two plates and the screen of protection against micro-   waves are glued to each other and fixed in one pass.   The laminated system according to any one of the   1, 3, 6 or 7 and according to Figure 6, characterized in that on the carrier plate (1) of the laminated assembly, having a protective sheet (2) glued over its entire surface, is bonded a metal flange ( 25) with an electroconductive glue, which flange is further adhered to the plate (4) with a permanently elastic adhesive (7), and which, using a frame in overlap <9) and screws passing through the bores (8) of the flange (25), is tight   on the wall of the room in which the micro-   waves. 12 Method of manufacturing a laminated system according to   any one of claims 1 to 3 and 6 or 7 and according to   Figure 7, characterized in that a metal frame serves simultaneously as a mold for the manufacture of the laminated system, a first plate being glued into the frame by means of a permanently elastic adhesive, and the protective sheet and the carrier plate being stuck in the   mold thus formed, over their entire surface, with the aid of a   sif with permanent elasticity, after which curing is carried out at temperatures of 60 to 2000 C.   Laminated system according to any one of the   1, 3, 6 or 7 and Figure 8, characterized in that the laminated system is in the form of a door for premises containing microwaves, a metal frame (9), with a microwave peripheral trap. (18), being electroconductively bonded or welded to a protective sheet (2), and in that this unit is adhered over its entire surface to a plate (1) with a resin / hardener (5), and in that a second plate (4) is adhered over its entire surface in the recess of the frame by means of the resin / hardener mixture (5), the frame (9) being provided with hinges (27).   Laminated system according to any of the claims   1, 3, 6, 7 and 13 and Figure 9, characterized in that a finished laminate is bonded with a permanently elastic adhesive (7) at three points peripheral to a metal frame (9). having a microwave peripheral sheet (18), the frame (9) being provided with recesses   peripheral (24) which simultaneously serve to dose the adhesive.   A laminated system according to any of the claims   1 to 7 or 13-, characterized in that a finished laminate, as shown in FIG. 10, is glued over its entire periphery against the short side, formed as a groove, of the metal frame, with the aid of FIG. an adhesive with permanent elasticity.   Laminated system according to any of the claims   cations 1 to 7 or 13, characterized in that the finished laminate, with a trim frame surrounding it on its short side,   is tight with the metal frame carrying the micro-trap   wave, which is further adhered, using a permanently elastic adhesive, to the laminated system and the frame, as shown in Figure 11. 17 Method of manufacturing a laminated system according to   any one of Claims 1 to 13 and Figure 12   characterized in that, on a metal frame (9) with a peripheral microwave trap (18>, a thin float glass plate is applied to the support provided for this purpose, with a sealing bead (10), and that the screen of protection   against microwaves is stuck with a sufficient overflow   in the groove (37) of the frame (9), the cover plate   11) being applied to it and glued to its edge at   frame (9) using a permanently elastic adhesive (7).   18 laminated system according to any one of the   cations 1, 9 or 13 characterized in that a finished laminate, the edges of the microwave protection sheet protruding outwardly on all sides of the plates, is applied according to Figure 13 on a metal frame ( 14) having a microwave peripheral trap (18) and a sealing bead (10), the frame (44) being equipped with   self-locking pliers (47), 4 which pass through   corresponding sleeves arranged in the protective sheet (2) and penetrate into bores (30) of a second frame (38) of metal or plastic D that the frame (38) also supports a peripheral bead (10); and that the protective sheet (2) of the laminated system is in contact with the metal frame (44) by means of the clamps (47) of the   clamping the two frames (44) and (38).   19 Method of manufacturing a laminated system according to   any of claims 1, 8 or 10, characterized   in that a stack of plates for the protection against microwaves of premises subjected to high temperatures and microwaves is manufactured by gluing, as shown in FIG. 14, into a metal frame ( 32) a borosilicate or glass-ceramic plate (1), using a permanent temperature and elasticity-resistant adhesive (7), after which the microwave protection (2) is applied and the tablet, together with the plates (4, 4 ', 4 ") and the spacer (9), on the seat (39) in the frame (32), this compression having the consequence that adhesive 7) passes through the bores or slots disposed in the protective sheet (2) and blocks them and simultaneously adheres the plate (4 "), a permanently resilient peripheral bonding (40) being performed along the end of the frame (32) to ensure the   cohesion of the laminated system with the plate (1).