EP0712101A1 - Alarm glass pane with semi-reflecting superficial film - Google Patents

Alarm glass pane with semi-reflecting superficial film Download PDF

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Publication number
EP0712101A1
EP0712101A1 EP95402479A EP95402479A EP0712101A1 EP 0712101 A1 EP0712101 A1 EP 0712101A1 EP 95402479 A EP95402479 A EP 95402479A EP 95402479 A EP95402479 A EP 95402479A EP 0712101 A1 EP0712101 A1 EP 0712101A1
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EP
European Patent Office
Prior art keywords
layer
semi
glass
alarm
conductive
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
EP95402479A
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German (de)
French (fr)
Inventor
Dieter Peetz
Andreas Reidt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saint Gobain Glass France SAS
Saint Gobain Vitrage SA
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Saint Gobain Vitrage SA
Saint Gobain Vitrage International SA
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Application filed by Saint Gobain Vitrage SA, Saint Gobain Vitrage International SA filed Critical Saint Gobain Vitrage SA
Publication of EP0712101A1 publication Critical patent/EP0712101A1/en
Withdrawn legal-status Critical Current

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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/02—Mechanical actuation
    • G08B13/04—Mechanical actuation by breaking of glass

Definitions

  • the present invention relates to a glazing formed from tempered glass, covered with a surface layer, semi-reflecting and conductive, and provided with solder connections for conductors connected to an electric alarm circuit, in order to serve as alarm glazing.
  • the panes with semi-reflecting surface layers find a very wide application both as sun protection glasses and also as thermal protection glasses with high heat insulation.
  • these semi-reflective layers currently used these are generally multilayer systems, for which the real functional layer is a silver layer, coated between the protective metallic layers and those of metallic oxides with anti- reflection and finish.
  • the semi-reflective surface layers usually used, including the functional silver layer, are characterized by a certain electrical conductivity.
  • a conductive surface layer as a break-in detector is well known, as is the application of toughened panes provided with such layers to the alarm glazing function, by connecting the surface film, which serves as a signal transmitter, to an electrical alarm circuit.
  • the surface coating forms the signal transmitter over its entire surface, and contact with the conductive layer is established at two diametrically opposite angles of the glass.
  • the toughened glass sheet, provided with the conductive layer is assembled by means of a thermoplastic intermediate film with a second sheet, not toughened or having undergone another type of toughening , so that in case of breakage of the glass carrying the conductive layer, the laminated safety glass undergoes bending as a result of the expansion of the first sheet, on which the conductive layer is arranged on the convex face. This layer will therefore be interrupted with greater probability.
  • a small partial surface of the conductive layer is isolated from the latter in a peripheral or angular zone. While the rest of the layer serves as a heating resistance, the electrically insulated partial surface is provided with contact electrodes and serves as a burglar detector.
  • the semi-reflecting layer is placed on one side and the alarm loop on the other, one or the other of these two devices is in all cases altered by contact with the rollers.
  • the alarm loop is located on the underside of the glass, it can also happen that the transport rollers become charged with impurities or ink imprints, which will later be printed on the glass.
  • the object of the present invention is to design a glazing unit provided with a semi-reflective coating and with a visible alarm loop, which can be manufactured in conventional quenching ovens, without alteration of the semi-reflective layer or of the glass surface and of the intrusion detector.
  • the technical problem posed is solved according to the invention in that the semi-reflecting conductive layer is removed over a small part of its surface, preferably in a corner of the glass, and in that in this zone a burglar detector , which is in the form of a conductive loop consisting of a baked conductive enamel, is arranged in direct contact with the surface of the glass.
  • the alarm loop and the semi-reflecting layer which are independent of one another and fulfill completely different functions on the same and single face of the glass, without this results in reciprocal disturbance or interference.
  • the alarm loop can have relatively small dimensions, so that the protection against the sun or the heat provided by the layer is very little diminished by the absence of the latter in the region of the loop.
  • the alarm loop does not come into contact as such with the conductive layer, so that the latter can have no negative effect on the alarm function of the conductive loop. In this way, it becomes possible to completely free the other side of the glass. Consequently, the latter can now be arranged without problem with its free surface on the conveyor rollers of the quenching furnace, and be heated and quenched according to the usual method, without there being any possible danger of damage or soiling. the layer or surface of the glass.
  • the glazing with alarm according to the invention can in principle be used in the form of a monolithic part.
  • the semi-reflecting layer is capable of withstanding atmospheric agents over a long period.
  • Such resistant layers consist for example of tin oxide and are produced by pyrolysis, by depositing on the glass sheets a solution containing an organometallic compound, and by heating this layer to obtain the corresponding oxidized form.
  • This is the more often, in the case of semi-reflecting layers with improved thermal insulation and protection against solar radiation, layers which have been deposited according to a vacuum process. This kind of layers has a much lower resistance to atmospheric agents.
  • this spacer frame 3 is an insulating glazing consisting of two glass sheets 1 and 2, which are assembled by means of a spacer frame 3.
  • the side faces of this spacer frame 3 in report with the glass sheets are usually glued to them by a sticky sealant 4, and the leave formed by the edges of the glass sheets and the spacer frame 3 is filled with another sticky sealant 5.
  • the sealed space thus delimited between the sheets of glass is filled with air or other gas.
  • this surface layer 8 it is preferably a transparent deposit whose reflection is increased in the field of infrared radiation; it therefore serves as a protective glass against solar radiation, and lets most of the visible light pass without significant attenuation, while it largely reflects thermal radiation. These properties necessarily correspond to an electrical conductivity of the improved layer.
  • the surface layer 8 is subsequently removed.
  • the elimination of the latter at its periphery can be carried out by mechanical or thermal methods and the technique itself is well known. This measure is useful in order to prevent the surface layer 8 from corroding by moisture which could diffuse from the edge.
  • this external glass sheet 1 In order to give this external glass sheet 1 the properties of an alarm glass, it is provided for example in one of its angular zones with an alarm loop 12 consisting of a conductive enamel. From this alarm loop 12 lead from the conductors 13 to the welded connections 14, which are placed very close to the edge of the glass sheet 1.
  • the conductors 13 and the connections to be welded 14 are part of the same block as alarm loop 12 and are arranged at the same time as the latter.
  • the alarm loop 12, the conductors 13 and the connections to be welded 14 have no contact with the surface layer 8.
  • the layer 8 is eliminated not only on the peripheral zone 10, but also inside zone 16, in which the alarm loop 12 and the supply circuits 13 are arranged.
  • the elimination of the layer 8 from this zone is carried out in a functional manner by means of a mechanical stripping device with numerical control, of the same type as that which is known for the elimination of the layer from the peripheral zone 10 d '' a window fitted with a coating.
  • the alarm loop 12 accompanied by the supply circuits 13 and the connections to be welded 14 is printed according to the process of screen printing on the surface of the glass.
  • the glass sheet 1 is brought to the tempering temperature of approximately 650 ° C. in a conventional quenching oven, which allows the baking of the printed baking ink, and this sheet is then thermally quenched by brutal cooling according to the well known procedure.
  • the surface layer 8 must of course be formed so that the heat treatment process can be carried out without damage.
  • layer systems with high thermal resistance are however known.
  • a preferential layer system of this type comprises for example five successive layers, namely: an adhesive layer of tin oxide, a metallic and underlying protective layer made of nickel-chromium, the actual functional layer which is in silver, a protective metallic layer of nickel-chromium at the top and a finishing layer of tin oxide.
  • the layer 8 with high heat resistance can of course have a different structure.

Abstract

The double glazed window has thin inner (1) and outer (2) glass panels. There is a plastic isolating section (3) mastic filled between the two glass sections. The rear glass panel has a thin semi-reflecting deposited layer (8) to aid heat retention. A circular section (16) is left free of the layer, and a conducting loop (12) formed by printing techniques, and enamelled. The conducting loop only leaves a small layer without the semi-reflecting layer, and provides the alarm.

Description

La présente invention concerne un vitrage formé de verre trempé, recouvert d'une couche superficielle, semi-réfléchissante et conductrice, et muni de connexions à souder pour des conducteurs reliés à un circuit électrique d'alarme, afin de servir de vitrage alarme.The present invention relates to a glazing formed from tempered glass, covered with a surface layer, semi-reflecting and conductive, and provided with solder connections for conductors connected to an electric alarm circuit, in order to serve as alarm glazing.

Les vitres à couches superficielles semi-réfléchissantes trouvent une très large application à la fois comme verres de protection solaire et aussi comme verres de protection thermique à haut pouvoir calorifuge. Parmi les couches semi-réfléchissantes actuellement utilisées, il s'agit en règle générale de systèmes multicouches, pour lesquels la véritable couche fonctionnelle est une couche d'argent, enrobée entre les couches métalliques de protection et celles d'oxydes métalliques à fonction anti-reflet et de finition. Les couches superficielles semi-réfléchissantes habituellement utilisées, dont la couche fonctionnelle en argent, se caractérisent par une certaine conductibilité électrique.The panes with semi-reflecting surface layers find a very wide application both as sun protection glasses and also as thermal protection glasses with high heat insulation. Among the semi-reflective layers currently used, these are generally multilayer systems, for which the real functional layer is a silver layer, coated between the protective metallic layers and those of metallic oxides with anti- reflection and finish. The semi-reflective surface layers usually used, including the functional silver layer, are characterized by a certain electrical conductivity.

L'utilisation d'une couche superficielle conductrice comme détecteur d'effraction est bien connue, ainsi que l'application des vitres trempées munies de telles couches à la fonction de vitrage alarme, en connectant la pellicule superficielle, qui sert de transmetteur de signal, à un circuit d'alarme électrique.The use of a conductive surface layer as a break-in detector is well known, as is the application of toughened panes provided with such layers to the alarm glazing function, by connecting the surface film, which serves as a signal transmitter, to an electrical alarm circuit.

Dans un vitrage avec alarme de ce type connu du document DE 3716766 A1, le revêtement superficiel forme sur toute sa superficie le transmetteur de signal, et l'établissement du contact avec la couche conductrice s'effectue à deux angles diamétralement opposés de la vitre. Afin d'assurer un déclenchement sûr de l'alarme, la feuille de verre trempée, munie de la couche conductrice, est assemblée par l'intermédiaire d'une pellicule intermédiaire thermoplastique avec une deuxième feuille, non trempée ou ayant subi un autre type de trempe, de telle sorte qu'en cas de bris de la vitre porteuse de la couche conductrice, le verre de sécurité feuilleté subisse une flexion par suite de l'expansion de la première feuille, sur laquelle la couche conductrice est disposée sur la face convexe. Cette couche sera donc interrompue avec une plus grande probabilité.In glazing with an alarm of this type known from document DE 3716766 A1, the surface coating forms the signal transmitter over its entire surface, and contact with the conductive layer is established at two diametrically opposite angles of the glass. To to ensure a safe triggering of the alarm, the toughened glass sheet, provided with the conductive layer, is assembled by means of a thermoplastic intermediate film with a second sheet, not toughened or having undergone another type of toughening , so that in case of breakage of the glass carrying the conductive layer, the laminated safety glass undergoes bending as a result of the expansion of the first sheet, on which the conductive layer is arranged on the convex face. This layer will therefore be interrupted with greater probability.

Dans un autre vitrage connu de la demande EP 0451608 A2, muni d'un revêtement conducteur, une petite surface partielle de la couche conductrice est isolée de celle-ci dans une zone périphérique ou angulaire. Tandis que le reste de la couche sert de résistance chauffante, la surface partielle isolée électriquement est munie d'électrodes de contact et sert de détecteur d'effraction.In another glazing known from patent application EP 0451608 A2, provided with a conductive coating, a small partial surface of the conductive layer is isolated from the latter in a peripheral or angular zone. While the rest of the layer serves as a heating resistance, the electrically insulated partial surface is provided with contact electrodes and serves as a burglar detector.

Il est en général souhaité que les vitrages alarme soient perçus en tant que tels, de manière à exercer d'office un certain effet dissuasif sur les cambrioleurs éventuels. Ce type de vitrage muni d'une couche semi-réfléchissante servant de détecteur d'effraction n'est cependant pas reconnaissable. C'est pourquoi la possibilité a déjà été envisagée, pour ces vitrages munis d'un dépôt superficiel conducteur, d'imprimer sur l'autre face de la vitre une boucle d'alarme visible, constituée d'une encre à cuire conductrice et imprimable, qui sera cuite au cours du processus de trempe de la vitre. Les vitrages alarme de ce type satisfont en tous points aux exigences posées, mais il s'est avéré que leur fabrication se heurte à des difficultés. Dans la technique de trempe aujourd'hui utilisée, les feuilles de verre en position horizontale sont en effet portées à une température de trempe d'environ 650°C dans un four à rouleaux. Comme dans la dernière version de vitrage avec alarme mentionnée la couche semi-réfléchissante est disposée sur l'une des faces et la boucle d'alarme sur l'autre, l'un ou l'autre des ces deux dispositifs est dans tous les cas altéré par le contact avec les rouleaux. Lorsque la boucle d'alarme se trouve à la face inférieure de la vitre, il peut en outre arriver que les rouleaux transporteurs se chargent d'impuretés ou d'empreintes de l'encre, qui s'imprimeront ultérieurement sur la vitre.It is generally desired that alarm glazing be perceived as such, so as to exert automatically a certain deterrent effect on possible burglars. This type of glazing provided with a semi-reflecting layer serving as a break-in detector is however not recognizable. This is why the possibility has already been considered, for these glazings provided with a conductive surface deposit, to print on the other face of the glass a visible alarm loop, consisting of a conductive and printable baking ink. , which will be baked during the glass tempering process. Alarm glazing of this type meets all the requirements, but it turned out that their manufacture encountered difficulties. In the tempering technique used today, the glass sheets in horizontal position are in fact brought to a tempering temperature of around 650 ° C. in a roller oven. As in the last version of glazing with alarm mentioned, the semi-reflecting layer is placed on one side and the alarm loop on the other, one or the other of these two devices is in all cases altered by contact with the rollers. When the alarm loop is located on the underside of the glass, it can also happen that the transport rollers become charged with impurities or ink imprints, which will later be printed on the glass.

L'objet de la présente invention est de concevoir un vitrage muni d'un revêtement semi-réfléchissant et d'une boucle d'alarme visible, qui puisse être fabriqué dans les fours à trempe habituels, sans altération de la couche semi-réfléchissante ou de la surface du verre et du détecteur d'effraction.The object of the present invention is to design a glazing unit provided with a semi-reflective coating and with a visible alarm loop, which can be manufactured in conventional quenching ovens, without alteration of the semi-reflective layer or of the glass surface and of the intrusion detector.

Le problème technique posé est résolu selon l'invention en ce que la couche conductrice semi-réfléchissante est enlevée sur une petite partie de sa surface, de préférence dans un angle de la vitre, et en ce que dans cette zone un détecteur d'effraction, qui se présente sous la forme d'une boucle conductrice constituée d'un émail cuit conducteur, est disposé en contact direct avec la surface du verre.The technical problem posed is solved according to the invention in that the semi-reflecting conductive layer is removed over a small part of its surface, preferably in a corner of the glass, and in that in this zone a burglar detector , which is in the form of a conductive loop consisting of a baked conductive enamel, is arranged in direct contact with the surface of the glass.

Dans ce vitrage selon l'invention se trouvent donc la boucle d'alarme et la couche semi-réfléchissante, qui sont indépendantes l'une de l'autre et remplissent des fonctions totalement différentes sur la même et unique face de la vitre, sans que cela entraîne de perturbation ou d'interférence réciproques. La boucle d'alarme peut avoir des dimensions relativement minimes, de sorte que la protection contre le soleil ou la chaleur apportée par la couche soit très peu diminuée par l'absence de celle-ci dans la région de la boucle. D'autre part, la boucle d'alarme n'entre pas en contact en tant que telle avec la couche conductrice, de sorte que celle-ci ne peut exercer aucun effet négatif sur la fonction d'alarme de la boucle conductrice. De cette manière, il devient possible de libérer totalement l'autre face de la vitre. Par conséquent, cette dernière peut désormais être disposée sans problème avec sa surface libre sur les rouleaux transporteurs du four de trempe, et être chauffée et trempée selon le procédé habituel, sans qu'il y ait un éventuel danger d'endommagement ou de souillure de la couche ou de la surface du verre.In this glazing according to the invention there are therefore the alarm loop and the semi-reflecting layer, which are independent of one another and fulfill completely different functions on the same and single face of the glass, without this results in reciprocal disturbance or interference. The alarm loop can have relatively small dimensions, so that the protection against the sun or the heat provided by the layer is very little diminished by the absence of the latter in the region of the loop. On the other hand, the alarm loop does not come into contact as such with the conductive layer, so that the latter can have no negative effect on the alarm function of the conductive loop. In this way, it becomes possible to completely free the other side of the glass. Consequently, the latter can now be arranged without problem with its free surface on the conveyor rollers of the quenching furnace, and be heated and quenched according to the usual method, without there being any possible danger of damage or soiling. the layer or surface of the glass.

Le vitrage avec alarme selon l'invention peut en principe être utilisé sous la forme d'une pièce monolithique. Cela suppose cependant que la couche semi-réfléchissante est de nature à résister sur une longue période aux agents atmosphériques. De telles couches résistantes se composent par exemple d'oxyde d'étain et sont fabriquées par pyrolyse, en déposant sur les feuilles de verre une solution renfermant un composé organométallique, et en chauffant cette couche pour obtenir la forme oxydée correspondante. Mais il s'agit le plus souvent, dans le cas des couches semi-réfléchissantes à isolation thermique améliorée et de protection contre le rayonnement solaire, de couches qui ont été déposées selon un procédé sous vide. Ce genre de couches présente une résistance beaucoup plus faible aux agents atmosphériques. C'est pourquoi elles sont normalement protégées de l'atmosphère environnante, soit en les disposant sur la face de la vitre orientée vers l'espace intercalaire rempli d'air sec ou d'un gaz rare, soit en leur faisant subir un traitement ultérieur pour les transformer en verre feuilleté au moyen d'une autre feuille de verre et d'une couche intermédiaire thermoplastique.The glazing with alarm according to the invention can in principle be used in the form of a monolithic part. However, this assumes that the semi-reflecting layer is capable of withstanding atmospheric agents over a long period. Such resistant layers consist for example of tin oxide and are produced by pyrolysis, by depositing on the glass sheets a solution containing an organometallic compound, and by heating this layer to obtain the corresponding oxidized form. But this is the more often, in the case of semi-reflecting layers with improved thermal insulation and protection against solar radiation, layers which have been deposited according to a vacuum process. This kind of layers has a much lower resistance to atmospheric agents. This is why they are normally protected from the surrounding atmosphere, either by placing them on the face of the glass facing the intermediate space filled with dry air or a rare gas, or by subjecting them to a subsequent treatment. to transform them into laminated glass by means of another glass sheet and a thermoplastic intermediate layer.

D'autres caractéristiques de l'invention apparaîtront à la lecture des sous-revendications et de la description ci-après d'un exemple de réalisation, illustré par le dessin correspondant.Other characteristics of the invention will appear on reading the sub-claims and the description below of an exemplary embodiment, illustrated by the corresponding drawing.

Dans l'exemple de réalisation représenté, il s'agit d'un vitrage isolant constitué de deux feuilles de verre 1 et 2, qui sont assemblées par l'intermédiaire d'un cadre écarteur 3. Les faces latérales de ce cadre écarteur 3 en rapport avec les feuilles de verre sont habituellement collées sur celles-ci par un mastic collant 4, et le congé formé par les bordures des feuilles de verre et le cadre écarteur 3 est rempli par un autre mastic collant 5. L'espace étanche ainsi délimité entre les feuilles de verre est rempli d'air ou d'un autre gaz.In the embodiment shown, it is an insulating glazing consisting of two glass sheets 1 and 2, which are assembled by means of a spacer frame 3. The side faces of this spacer frame 3 in report with the glass sheets are usually glued to them by a sticky sealant 4, and the leave formed by the edges of the glass sheets and the spacer frame 3 is filled with another sticky sealant 5. The sealed space thus delimited between the sheets of glass is filled with air or other gas.

La feuille de verre 1, qui forme la partie du vitrage orientée vers l'extérieur lorsqu'elle est montée, est munie d'une couche superficielle 8 semi-réfléchissante et conductrice sur sa face en rapport avec l'interstice rempli d'air. Dans le cas de cette couche superficielle 8, il s'agit de préférence d'un dépôt transparent dont la réflexion est accrue dans le domaine des radiations infrarouges ; elle sert donc de verre de protection contre le rayonnement solaire, et laisse passer la majeure partie de la lumière visible sans atténuation sensible, tandis qu'elle réfléchit largement le rayonnement thermique. Ces propriétés correspondent obligatoirement à une conductibilité électrique de la couche améliorée.The glass sheet 1, which forms the part of the glazing oriented towards the outside when it is mounted, is provided with a semi-reflective and conductive surface layer 8 on its face in relation to the air-filled gap. In the case of this surface layer 8, it is preferably a transparent deposit whose reflection is increased in the field of infrared radiation; it therefore serves as a protective glass against solar radiation, and lets most of the visible light pass without significant attenuation, while it largely reflects thermal radiation. These properties necessarily correspond to an electrical conductivity of the improved layer.

Dans la zone périphérique 10 placée à proximité et qui sert à la liaison avec le cadre écarteur 3, la couche superficielle 8 est éliminée ultérieurement. L'élimination de cette dernière à sa périphérie peut être effectuée par des méthodes mécaniques ou thermiques et la technique est elle-même bien connue. Cette mesure est utile afin d'empêcher que la couche superficielle 8 se corrode par l'humidité qui pourrait diffuser en provenance de la bordure.In the peripheral zone 10 placed nearby and which is used for the connection with the spacer frame 3, the surface layer 8 is subsequently removed. The elimination of the latter at its periphery can be carried out by mechanical or thermal methods and the technique itself is well known. This measure is useful in order to prevent the surface layer 8 from corroding by moisture which could diffuse from the edge.

Afin de conférer à cette feuille de verre 1 externe les propriétés d'une vitre alarme, elle est munie par exemple dans une de ses zones angulaires d'une boucle d'alarme 12 constituée d'un émail conducteur. A partir de cette boucle d'alarme 12 partent des conducteurs 13 jusqu'aux connexions soudées 14, qui sont placées très près de la bordure de la feuille de verre 1. Les conducteurs 13 et les connexions à souder 14 font partie du même bloc que la boucle d'alarme 12 et sont disposés en même temps que cette dernière.In order to give this external glass sheet 1 the properties of an alarm glass, it is provided for example in one of its angular zones with an alarm loop 12 consisting of a conductive enamel. From this alarm loop 12 lead from the conductors 13 to the welded connections 14, which are placed very close to the edge of the glass sheet 1. The conductors 13 and the connections to be welded 14 are part of the same block as alarm loop 12 and are arranged at the same time as the latter.

La boucle d'alarme 12, les conducteurs 13 et les connexions à souder 14 n'ont aucun contact avec la couche superficielle 8. En effet, la couche 8 est éliminée non seulement sur la zone périphérique 10, mais aussi à l'intérieur de la zone 16, dans laquelle la boucle d'alarme 12 et les circuits d'amenée 13 sont disposés. l'élimination de la couche 8 de cette zone s'effectue de manière fonctionnelle au moyen d'un dispositif mécanique de dénudage à commande numérique, du même type que celui qui est connu pour l'élimination de la couche de la zone périphérique 10 d'une vitre munie d'un revêtement. En principe, il est aussi possible de procéder de la manière suivante : avant le dépôt de la couche, la zone mentionnée peut par exemple être recouverte par le collage d'une mince pellicule, qui est enlevée après l'opération de déposition. Il est cependant beaucoup plus rentable de traiter toute la surface des feuilles de verre de grande dimensions et, après la découpe de celles-ci aux dimension requises, d'éliminer ultérieurement la couche superficielle aux emplacements souhaités.The alarm loop 12, the conductors 13 and the connections to be welded 14 have no contact with the surface layer 8. In fact, the layer 8 is eliminated not only on the peripheral zone 10, but also inside zone 16, in which the alarm loop 12 and the supply circuits 13 are arranged. the elimination of the layer 8 from this zone is carried out in a functional manner by means of a mechanical stripping device with numerical control, of the same type as that which is known for the elimination of the layer from the peripheral zone 10 d '' a window fitted with a coating. In principle, it is also possible to proceed in the following manner: before the deposition of the layer, the mentioned area can for example be covered by the bonding of a thin film, which is removed after the deposition operation. However, it is much more profitable to treat the entire surface of the large glass sheets and, after cutting them to the required dimensions, to subsequently remove the surface layer at the desired locations.

Dans la zone 16 dénudée de sa couche superficielle 8, la boucle d'alarme 12 accompagnée des circuits d'amenée 13 et des connexions à souder 14 est imprimée selon le procédé de la sérigraphie à la surface du verre. Après que l'encre d'impression est sèche, la feuille de verre 1 est portée à la température de trempe d'environ 650°C dans un four de trempe classique, ce qui permet la cuisson de l'encre à cuire imprimée, et cette feuille est ensuite trempée thermiquement par refroidissement brutal selon la procédure bien connue.In the area 16 stripped of its surface layer 8, the alarm loop 12 accompanied by the supply circuits 13 and the connections to be welded 14 is printed according to the process of screen printing on the surface of the glass. After the printing ink has dried, the glass sheet 1 is brought to the tempering temperature of approximately 650 ° C. in a conventional quenching oven, which allows the baking of the printed baking ink, and this sheet is then thermally quenched by brutal cooling according to the well known procedure.

La couche superficielle 8 doit bien entendu être constituée de telle sorte que le procédé de traitement thermique puisse être mis en oeuvre sans dommage. De tels systèmes à couches à haute résistance thermique sont cependant connus. Un système à couches préférentiel de ce type comprend par exemple cinq couches successives, à savoir : une couche adhésive d'oxyde d'étain, une couche protectrice métallique et sous-jacente constituée de nickel-chrome, la couche fonctionnelle proprement dite qui est en argent, une couche protectrice métallique en nickel-chrome à la partie supérieure et une couche de finition en oxyde d'étain. Mais la couche 8 à haute tenue à la chaleur peut bien entendu avoir une structure différente.The surface layer 8 must of course be formed so that the heat treatment process can be carried out without damage. Such layer systems with high thermal resistance are however known. A preferential layer system of this type comprises for example five successive layers, namely: an adhesive layer of tin oxide, a metallic and underlying protective layer made of nickel-chromium, the actual functional layer which is in silver, a protective metallic layer of nickel-chromium at the top and a finishing layer of tin oxide. But the layer 8 with high heat resistance can of course have a different structure.

Claims (5)

Vitrage constitué de verre trempé et revêtu d'une couche superficielle semi-réfléchissante et conductrice, muni de connexions à souder pour la réception des conducteurs de liaison à un circuit d'alarme électrique et servant de vitrage alarme, caractérisé en ce que la couche (8) semi-réfléchissante conductrice est enlevée sur une petite zone (16) de sa surface, de préférence à un angle de la feuille de verre (1), et en ce que dans cette zone (16) aménagée un détecteur d'effraction ayant la forme d'une boucle conductrice (12) constituée d'un émail conducteur cuit est disposé en contact direct avec la surface du verre.Glazing consisting of tempered glass and coated with a semi-reflective and conductive surface layer, provided with solder connections for receiving the conductors for connection to an electrical alarm circuit and serving as alarm glazing, characterized in that the layer ( 8) conductive semi-reflective is removed over a small area (16) of its surface, preferably at an angle to the glass sheet (1), and in that in this area (16) provided an intrusion detector having the shape of a conductive loop (12) consisting of a baked conductive enamel is arranged in direct contact with the surface of the glass. Vitrage selon la revendication 1, caractérisé en ce que la couche (8) semi-réfléchissante et conductrice se compose d'un système multicouche appliqué selon le procédé de pulvérisation cathodique assistée par un champ magnétique.Glazing according to claim 1, characterized in that the semi-reflecting and conducting layer (8) consists of a multilayer system applied according to the sputtering process assisted by a magnetic field. Vitrage selon la revendication 1 ou la revendication 2, caractérisé en ce que la couche (8) semi-réfléchissante et la feuille de verre (1) munie de la boucle conductrice (12) est assemblée avec une autre feuille de verre (2), avec interposition d'un cadre écarteur (3), pour former un vitrage isolant, la couche (8) semi-réfléchissante et la boucle conductrice (12) étant disposés sur la face de la feuille de verre (1) trempée, qui est orientée vers l'espace rempli d'air entre les deux feuilles.Glazing according to claim 1 or claim 2, characterized in that the semi-reflecting layer (8) and the glass sheet (1) provided with the conductive loop (12) is assembled with another glass sheet (2), with the interposition of a spacer frame (3), to form an insulating glazing, the semi-reflecting layer (8) and the conductive loop (12) being arranged on the face of the toughened glass sheet (1), which is oriented towards the air-filled space between the two sheets. Vitrage selon la revendication 1 ou la revendication 2, caractérisée en ce que la feuille de verre (1) trempée munie de la couche (8) semi-réfléchissante et de la boucle conductrice (12) s'assemble avec une autre feuille de verre par adjonction d'une pellicule en polymère thermoplastique pour constituer un verre feuilleté.Glazing according to claim 1 or claim 2, characterized in that the toughened glass sheet (1) provided with the semi-reflecting layer (8) and the conductive loop (12) is assembled with another glass sheet by addition of a thermoplastic polymer film to form a laminated glass. Procédé de fabrication d'un vitrage alarme selon la revendication 1, caractérisé en ce qu'une feuille de verre (1) est utilisée, qui est munie sur toute l'étendue de l'une de ses faces d'une couche (8) semi-réfléchissante à haute tenue à la chaleur, en ce que dans la zone (16), prévue pour la mise en place de la boucle d'alarme (12) et des conducteurs de liaison (13,14) du courant, la couche (8) est éliminée par abrasion mécanique, en ce que dans la zone (16) libérée de la couche (8) une boucle d'alarme (12), avec ses conducteurs de liaison (13,14) constitués d'une encre à cuire conductrice, est imprimée selon le procédé de la sérigraphie, et en ce que la feuille de verre (1) ainsi revêtue est portée à la température de trempe et trempée thermiquement par refroidissement brutal, avec cuisson simultanée des conducteurs imprimés (12,13,14).Method of manufacturing an alarm glazing according to claim 1, characterized in that a sheet of glass (1) is used, which is provided over the whole extent of one of its faces with a layer (8) semi-reflective with high heat resistance, in that in the zone (16), provided for the installation of the alarm loop (12) and of the connecting conductors (13,14) of the current, the layer (8) is eliminated by mechanical abrasion, in that in the zone (16) freed from the layer (8) an alarm loop (12), with its connecting conductors (13,14) consisting of a conductive baking ink, is printed according to the screen printing process, and in that the glass sheet (1) thus coated is brought to the tempering temperature and thermally toughened by brutal cooling, with simultaneous cooking of the printed conductors (12,13,14).
EP95402479A 1994-11-10 1995-11-07 Alarm glass pane with semi-reflecting superficial film Withdrawn EP0712101A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19944440062 DE4440062A1 (en) 1994-11-10 1994-11-10 Alarm glass with a partially reflective surface layer
DE4440062 1994-11-10

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EP0712101A1 true EP0712101A1 (en) 1996-05-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0989781A2 (en) * 1998-09-25 2000-03-29 Schott Glas Multiple glazing and manufacturing method of plate glass coated in order to manufacture multiple glazing

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0058348A2 (en) * 1981-02-16 1982-08-25 VEGLA Vereinigte Glaswerke GmbH Alarm glass pane and method of making the same
DE3716766A1 (en) 1986-05-22 1987-11-26 Glaverbel GLAZING PANEL
EP0451608A2 (en) 1990-04-10 1991-10-16 VEGLA Vereinigte Glaswerke GmbH Electrically heated alarm glass pane

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0058348A2 (en) * 1981-02-16 1982-08-25 VEGLA Vereinigte Glaswerke GmbH Alarm glass pane and method of making the same
DE3716766A1 (en) 1986-05-22 1987-11-26 Glaverbel GLAZING PANEL
EP0451608A2 (en) 1990-04-10 1991-10-16 VEGLA Vereinigte Glaswerke GmbH Electrically heated alarm glass pane

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0989781A2 (en) * 1998-09-25 2000-03-29 Schott Glas Multiple glazing and manufacturing method of plate glass coated in order to manufacture multiple glazing
EP0989781A3 (en) * 1998-09-25 2000-06-21 Schott Glas Multiple glazing and manufacturing method of plate glass coated in order to manufacture multiple glazing
US6268594B1 (en) 1998-09-25 2001-07-31 Schott Glas Appliance such as a refrigerator or freezer with a transparent viewing door and a method of manufacture of a refrigerator or freezer with a transparent viewing door

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Publication number Publication date
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