WO2000030867A1 - Process for fabricating a writing board, and writing board obtained with such process - Google Patents

Process for fabricating a writing board, and writing board obtained with such process Download PDF

Info

Publication number
WO2000030867A1
WO2000030867A1 PCT/ES1998/000315 ES9800315W WO0030867A1 WO 2000030867 A1 WO2000030867 A1 WO 2000030867A1 ES 9800315 W ES9800315 W ES 9800315W WO 0030867 A1 WO0030867 A1 WO 0030867A1
Authority
WO
WIPO (PCT)
Prior art keywords
glass
opacity
sheet
glass sheet
tempered glass
Prior art date
Application number
PCT/ES1998/000315
Other languages
Spanish (es)
French (fr)
Inventor
José Antonio ALONSO GOROSTIZA
Rafael Torres Sancho
Original Assignee
Guardian Llodio, S.A.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Guardian Llodio, S.A. filed Critical Guardian Llodio, S.A.
Priority to AT98954496T priority Critical patent/ATE248717T1/en
Priority to EP98954496A priority patent/EP1057657B1/en
Priority to PCT/ES1998/000315 priority patent/WO2000030867A1/en
Priority to ES98954496T priority patent/ES2207003T3/en
Priority to DE69817880T priority patent/DE69817880D1/en
Publication of WO2000030867A1 publication Critical patent/WO2000030867A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L1/00—Repeatedly-usable boards or tablets for writing or drawing
    • B43L1/04—Blackboards
    • B43L1/10—Writing surfaces thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L1/00—Repeatedly-usable boards or tablets for writing or drawing
    • B43L1/04—Blackboards
    • B43L1/06—Blackboards rigid

Definitions

  • the invention relates to a process for obtaining a glass slate, in which the writing is carried out by means of a marker or similar tool, presenting as a fundamental characteristic that said surface is matt or dull in order to avoid glare or reflections, allowing that said surface can be used in addition to slide viewing-
  • the constitution or structure of the slate obtained in accordance with the aforementioned process is also object of the invention, said slate being basically constituted by a sheet of tempered glass with the writing surface matted and provided on the opposite side with an opacity layer, which can be of a different nature and even complement with other sheets or different layers.
  • plastic whiteboards usually white
  • surface characters can be written using a specific marker, such characters being easily removed by an appropriate eraser.
  • the writing surface being plastic in nature, does not resist the application of certain solvents such as acetone, alcohol, etc., much less logically certain acids.
  • the surface of the board produces glare or reflections that make it unsuitable for use, for example, as a slide projection surface.
  • the invention relates to a method of manufacturing a slate, as well as the structure of the slate obtained by said method, which has all the known advantages in this type of slate, but none of its drawbacks, since it does not reflect the light and therefore the images, supporting any solvent except hydrofluoric acid and being of high durability, practically unpleasant with the passage of time and use, being able to use as a surface to visualize slides without causing glitters or reflections, and all this as a consequence of the fact that the slate in question is obtained from a sheet of tempered and matt glass as will be exposed throughout the present description.
  • the procedure for obtaining or manufacturing the board is based on the following operational phases:
  • the most efficient matting occurs to the acid, since this method causes the formation of a very fine roughness or porosity and homogeneously distributed throughout the treated surface.
  • the coarsest mattress also the cheapest, is achieved by appropriate rollers in the process of laminated glass printing.
  • Sand matting is an intermediate solution in terms of quality and price.
  • the edges of the glass sheet are polished to avoid sharp edges.
  • a vitrifiable paint is applied, or what is the same as an opacity layer that is applied by screen printing or by any other system on the opposite side of the matte writing surface.
  • the glass sheet is tempered, so that during tempering a double effect is achieved, on the one hand the enamel vitrification, or what is the same its permanent fixation to the glass, and on the other hand the tempered itself.
  • the slate thus obtained is made of tempered glass, so that in case of breakage it is divided into multiple particles.
  • a matting or dulling process of both sides of the tempered glass sheet can be carried out, the opacity layer being applied on any of them, consisting of a vitrifiable enamel that is applied by screen printing.
  • two sheets of glass one tempered and the other of normal glass, can be used, so that on the first is where the matting will be performed to form the writing surface, both sheets being joined, as usual, by a suitable plastic sheet, preferably polyvinyl butyral (PVB), a layer that at the same time determines the opacity of the board, for which it will be colored, preferably in white.
  • a suitable plastic sheet preferably polyvinyl butyral (PVB)
  • PVB polyvinyl butyral
  • the tempered and matt glass sheet is screen printed on the opposite side of the writing and that
  • the union with the normal glass sheet is made with transparent polyvinyl butyral, which in this case will act as a link between the two glass sheets, because the opacity is produced by screen printing.
  • Figure 1 shows a concrete embodiment of a glass slate obtained in accordance with a preferred form of the invention, constituted in this case by a tempered glass sheet with matte on both sides and in one of them applied the opacity layer constituted by a silkscreen based on a vitrifiable enamel.
  • Figure 2. It shows a sectional detail of a slate portion in which a tempered glass sheet, a normal glass sheet and a plastic sheet, such as a polyvinyl butyral (PVB) sheet are involved, which, in addition joining both sheets of glass, determines the opacity of the board, being colored, preferably white.
  • a plastic sheet such as a polyvinyl butyral (PVB) sheet
  • Figure 3.- Finally shows a sectional view of a detail corresponding to a portion of slate constituted by a sheet of tempered glass, a sheet of normal glass, the tempered glass sheet having been screen printed on the opposite side of the writing, the union of both sheets of glass being produced by PVB film or film.
  • a section of slate can be seen in section, constituted by a sheet of tempered glass (1), whose two faces (2-2 ') have been subject to a matting process, to avoid reflections or glare on the constitutive surface of the faces (2-2 '), having provided that in one of them a layer (3) of a vitrifiable enamel is applied by screen printing, all of such that the face (2) will constitute the writing surface, while the layer (3) applied on the opposite face (2 ') determines the opacity of the board.
  • the slate can include a tempered glass sheet (1) and a normal glass sheet (1 '), the tempered glass sheet (1) being provided with the corresponding matte in its face (2) constituting the writing surface, while between both sheets of glass (1-1 ') there is a plastic sheet or film (4), preferably polyvinyl butyral, which is constituted as a connecting element and at the same time it produces the necessary degree of opacity, for which said PVB film will be colored, preferably in white color.
  • a plastic sheet or film (4) preferably polyvinyl butyral, which is constituted as a connecting element and at the same time it produces the necessary degree of opacity, for which said PVB film will be colored, preferably in white color.
  • the slate manufactured according to the embodiment shown in Figure 2 will have the characteristics of the glass laminated and, consequently, that in case of breakage the pieces of glass do not come off, but remain attached to the joining element or PVB film.
  • the plastic sheet or film (4) be white, preferably.
  • the board includes, as in the previous case, two sheets of glass (1-1 '), the first of tempered glass and the second of normal glass.
  • the tempered glass sheet (1) is matted on the writing face (2) and has a screen print (3 ') on the opposite side.
  • the joining of the two glass sheets is carried out with appropriate plastic film (4 '), for example with PVB film which, in this case, will be transparent, since it operates only and exclusively as a link between the two sheets of glass.

Abstract

One of the faces (2) at least of a tempered glass sheet (1) is roughened in order to form the writing surface of the corresponding writing board to be obtained in order to avoid reflections and to view slides on said surface of face (2) of the glass sheet (1) forming the writing board. On the opposite face (2') which is roughened or not, a serigraphy layer (3) based on a vitrifiable enamel is applied. This layer (3) determines the necessary opacity. The writing board may also be comprised of a tempered glass sheet and another normal glass sheet, and the opacity layer can be inserted between the two sheets, said opacity layer being also comprised of the film itself for joining the glass sheets, such as preferably white butyral polyvynil or by serigraphy of the back face, in which case the joining film is transparent.

Description

PROCEDIMIENTO DE FABRICACIÓN DE UNA PIZARRA Y PIZARRA OBTENIDA CON TAL PROCEDIMIENTO PROCESS FOR MANUFACTURING OF A SLATE AND SLATE OBTAINED WITH SUCH PROCEDURE
D E S C R I P C I Ó ND E S C R I P C I Ó N
OBJETO DE LA INVENCIÓNOBJECT OF THE INVENTION
La invención se refiere a un procedimiento para la obtención de una pizarra de vidrio, en la que la escritura se realiza mediante un rotulador o útil similar, presentando como característica fundamental que dicha superficie es mateada o deslucida al objeto de evitar brillos o reflejos, permitiendo que dicha superficie pueda ser utilizada complementariamente para el visionado de diapositivas-The invention relates to a process for obtaining a glass slate, in which the writing is carried out by means of a marker or similar tool, presenting as a fundamental characteristic that said surface is matt or dull in order to avoid glare or reflections, allowing that said surface can be used in addition to slide viewing-
Es igualmente objeto de la invención la constitución o estructura de la pizarra obtenida de acuerdo con el referido procedimiento, estando básicamente constituida dicha pizarra mediante una lámina de vidrio templado con la superficie de escritura mateada y dotada en la cara opuesta de una capa de opacidad, que puede ser de distinta naturaleza e incluso complementarse con otras láminas o capas diferentes.The constitution or structure of the slate obtained in accordance with the aforementioned process is also object of the invention, said slate being basically constituted by a sheet of tempered glass with the writing surface matted and provided on the opposite side with an opacity layer, which can be of a different nature and even complement with other sheets or different layers.
ANTECEDENTES DE LA INVENCIÓNBACKGROUND OF THE INVENTION
Son conocidas las ventajas que ofrecen las pizarras de plástico, normalmente de color blanco, sobre cuya superficie se pueden escribir caracteres mediante un rotulador específico, siendo tales caracteres de fácil eliminación mediante un borrador apropiado.The advantages offered by plastic whiteboards, usually white, are known on whose surface characters can be written using a specific marker, such characters being easily removed by an appropriate eraser.
No obstante, dicho tipo de pizarras presentan una serie de inconvenientes entre los que se pueden citar los siguientes:However, this type of blackboard has a series of drawbacks, among which we can mention following:
- Con el tiempo y el uso suelen sufrir una degradación que normalmente desemboca en una inutilización de la pizarra.- Over time and use they tend to suffer a degradation that normally leads to a blackout of the board.
- La escritura se debe realizar siempre con un rotulador específico.- Writing should always be done with a specific marker.
- La superficie de escritura, al ser de naturaleza plástica, no resiste la aplicación de determinados disolventes tales como acetona, alcohol, etc., y mucho menos lógicamente determinados ácidos.- The writing surface, being plastic in nature, does not resist the application of certain solvents such as acetone, alcohol, etc., much less logically certain acids.
- Como consecuencia del punto anterior, la eliminación de manchas o caracteres originados por un rotulador no específico o por cualquier otro medio, resulta difícil de conseguir.- As a consequence of the previous point, the removal of spots or characters caused by a non-specific marker or by any other means is difficult to achieve.
- La superficie de la pizarra produce brillos o reflejos que la hacen inadecuada para su utilización, por ejemplo, como superficie de proyección de diapositivas.- The surface of the board produces glare or reflections that make it unsuitable for use, for example, as a slide projection surface.
DESCRIPCIÓN DE LA INVENCIÓNDESCRIPTION OF THE INVENTION
La invención se refiere a un procedimiento de fabricación de una pizarra, así como a la estructura de la pizarra obtenida mediante dicho procedimiento, que presenta todas las ventajas conocidas en este tipo de pizarras, pero ninguno de sus inconvenientes, ya que no refleja la luz y por lo tanto las imágenes, soportando cualquier disolvente excepto el ácido fluorhídrico y siendo de elevada durabilidad, prácticamente indegradable con el paso del tiempo y uso, pudiéndose utilizar como superficie para visualizar diapositivas sin originar brillos o reflejos, y todo ello como consecuencia de que la pizarra en cuestión se obtiene a partir de una lámina de vidrio templado y mateado tal y como se expondrá a lo largo de la presente descripción.The invention relates to a method of manufacturing a slate, as well as the structure of the slate obtained by said method, which has all the known advantages in this type of slate, but none of its drawbacks, since it does not reflect the light and therefore the images, supporting any solvent except hydrofluoric acid and being of high durability, practically unpleasant with the passage of time and use, being able to use as a surface to visualize slides without causing glitters or reflections, and all this as a consequence of the fact that the slate in question is obtained from a sheet of tempered and matt glass as will be exposed throughout the present description.
El procedimiento de obtención o fabricación de la pizarra se basa en las siguientes fases operativas:The procedure for obtaining or manufacturing the board is based on the following operational phases:
- Partiendo de una lámina de vidrio de un espesor que permita su templado y de dimensiones apropiadas a la pizarra a obtener, se le somete a un proceso de mateado sobre, al menos, una de sus dos caras, pudiendo realizarse ese mateado por cualquier sistema conocido, bien al ácido (con ácido fluorhídrico) , a la arena (mediante la proyección de arena sobre la superficie a matear) o mecánicamente en caliente en el propio proceso de laminado impreso del vidrio.- Starting from a sheet of glass of a thickness that allows its tempering and of appropriate dimensions to the slate to be obtained, it is subjected to a matting process on at least one of its two faces, being able to perform that matting by any system known, either to acid (with hydrofluoric acid), to sand (by spraying sand on the surface to be matted) or mechanically hot in the process of laminated glass printing.
Mediante el mateado se crea en la superficie tratada una rugosidad, crateado o porosidad que reduce o evita incluso la reflexión, de tal manera que la superficie así tratada no refleja imágenes ni produce brillos.By roughing, a roughness, crateing or porosity is created on the treated surface that reduces or prevents even reflection, so that the surface thus treated does not reflect images or produce glare.
El mateado más eficaz se produce al ácido, ya que este método origina la formación de una rugosidad o porosidad muy fina y homogéneamente repartida por toda la superficie tratada. El mateado más basto, también el más barato, se logra mediante rodillos apropiados en el propio proceso de laminado impreso del vidrio. El mateado con arena, resulta una solución intermedia en cuanto a calidad y precio.The most efficient matting occurs to the acid, since this method causes the formation of a very fine roughness or porosity and homogeneously distributed throughout the treated surface. The coarsest mattress, also the cheapest, is achieved by appropriate rollers in the process of laminated glass printing. Sand matting is an intermediate solution in terms of quality and price.
- Seguidamente se pulen los cantos de la lámina de vidrio para evitar aristas cortantes. A continuación se aplica una pintura vitrificable, o lo que es lo mismo una capa de opacidad que se aplica por serigrafiado o por cualquier otro sistema sobre la cara opuesta a la de la superficie mateada de escritura.- Then the edges of the glass sheet are polished to avoid sharp edges. Next, a vitrifiable paint is applied, or what is the same as an opacity layer that is applied by screen printing or by any other system on the opposite side of the matte writing surface.
- Finalmente, la lámina de vidrio se templa, de manera que durante el templado se consigue un doble efecto, por un lado el vitrificado del esmalte, o lo que es lo mismo su fijación permanente al vidrio, y por otro lado el propio templado.- Finally, the glass sheet is tempered, so that during tempering a double effect is achieved, on the one hand the enamel vitrification, or what is the same its permanent fixation to the glass, and on the other hand the tempered itself.
La pizarra así obtenida es de vidrio templado, de manera que en caso de rotura se fracciona en múltiples partículas.The slate thus obtained is made of tempered glass, so that in case of breakage it is divided into multiple particles.
En el procedimiento puede llevarse a cabo un proceso de mateado o deslucido de ambas caras de la lámina de vidrio templado, aplicándose sobre cualquiera de ellas la capa de opacidad, constituida por un esmalte vitrificable que se aplica por serigrafiado.In the process, a matting or dulling process of both sides of the tempered glass sheet can be carried out, the opacity layer being applied on any of them, consisting of a vitrifiable enamel that is applied by screen printing.
Igualmente, en el procedimiento pueden utilizarse dos láminas de vidrio, una templada y la otra de vidrio normal, de manera que sobre la primera es donde se realizará el mateado para formar la superficie de escritura, quedando ambas láminas unidas, como es habitual, por una lámina de plástico adecuado, preferentemente polivinil butiral (PVB) , capa que a la vez determina la opacidad de la pizarra, para lo cual estará coloreada, preferentemente en color blanco.Likewise, in the procedure two sheets of glass, one tempered and the other of normal glass, can be used, so that on the first is where the matting will be performed to form the writing surface, both sheets being joined, as usual, by a suitable plastic sheet, preferably polyvinyl butyral (PVB), a layer that at the same time determines the opacity of the board, for which it will be colored, preferably in white.
Según el procedimiento de la invención, es posible también que la lámina de vidrio templado y mateado esté serigrafiada por el lado opuesto al de la escritura y que la unión con la lámina de vidrio normal se realice con polivinil butiral transparente, que en este caso actuará como nexo de unión de las dos láminas de vidrio, por cuanto la opacidad la produce la serigrafía.According to the process of the invention, it is also possible that the tempered and matt glass sheet is screen printed on the opposite side of the writing and that The union with the normal glass sheet is made with transparent polyvinyl butyral, which in this case will act as a link between the two glass sheets, because the opacity is produced by screen printing.
DESCRIPCIÓN DE LOS DIBUJOSDESCRIPTION OF THE DRAWINGS
Para complementar la descripción que se está realizando y con objeto de ayudar a una mejor comprensión de las características del invento, de acuerdo con un ejemplo preferente de realización práctica del mismo, se acompaña como parte integrante de dicha descripción, un juego de dibujos en donde con carácter ilustrativo y no limitativo, se ha representado diferentes formas de realización de la pizarra obtenida de acuerdo con el procedimiento de la invención:To complement the description that is being made and in order to help a better understanding of the characteristics of the invention, according to a preferred example of practical implementation thereof, a set of drawings is attached as an integral part of said description. For illustrative and non-limiting purposes, different embodiments of the slate obtained in accordance with the process of the invention have been represented:
La figura 1.- Muestra una realización concreta de una pizarra de vidrio obtenida de acuerdo con una forma preferente de la invención, constituida en este caso por una lámina de vidrio templado con mateado por ambas caras y en una de ellas aplicada la capa de opacidad constituida por una serigrafía a base de un esmalte vitrificable.Figure 1 shows a concrete embodiment of a glass slate obtained in accordance with a preferred form of the invention, constituted in this case by a tempered glass sheet with matte on both sides and in one of them applied the opacity layer constituted by a silkscreen based on a vitrifiable enamel.
La figura 2.- Muestra un detalle en sección de una porción de pizarra en la que intervienen una lámina de vidrio templado, una lámina de vidrio normal y entre ellas una lámina de plástico, tal como una lámina polivinil butiral (PVB) que, además unir ambas láminas de vidrio, determina la opacidad de la pizarra, al estar coloreada, preferentemente en color blanco.Figure 2.- It shows a sectional detail of a slate portion in which a tempered glass sheet, a normal glass sheet and a plastic sheet, such as a polyvinyl butyral (PVB) sheet are involved, which, in addition joining both sheets of glass, determines the opacity of the board, being colored, preferably white.
La figura 3.- Muestra, finalmente, una vista en sección de un detalle correspondiente a una porción de pizarra constituida mediante una lámina de vidrio templado, una lámina de vidrio normal, habiendo sido la lámina de vidrio templado serigrafiada por el lado opuesto al de la escritura, produciéndose la unión de ambas láminas de vidrio mediante lámina o film de PVB.Figure 3.- Finally shows a sectional view of a detail corresponding to a portion of slate constituted by a sheet of tempered glass, a sheet of normal glass, the tempered glass sheet having been screen printed on the opposite side of the writing, the union of both sheets of glass being produced by PVB film or film.
REALIZACIÓN PREFERENTE DE LA INVENCIÓNPREFERRED EMBODIMENT OF THE INVENTION
Como se puede ver en las figuras referidas, y más concretamente en relación con la figura 1, puede observarse una porción de pizarra en sección, constituida mediante una lámina de vidrio templado (1), cuyas dos caras (2-2') han sido sometidas a un proceso de mateado, para evitar reflejos o brillos sobre la superficie constitutiva de las caras (2-2'), habiéndose previsto que en una de ellas se aplique por serigrafía una capa (3) de un esmalte vitrificable, todo ello de manera tal que la cara (2) constituirá la superficie de escritura, mientras que la capa (3) aplicada sobre la cara opuesta (2') determina la opacidad de la pizarra.As can be seen in the aforementioned figures, and more specifically in relation to Figure 1, a section of slate can be seen in section, constituted by a sheet of tempered glass (1), whose two faces (2-2 ') have been subject to a matting process, to avoid reflections or glare on the constitutive surface of the faces (2-2 '), having provided that in one of them a layer (3) of a vitrifiable enamel is applied by screen printing, all of such that the face (2) will constitute the writing surface, while the layer (3) applied on the opposite face (2 ') determines the opacity of the board.
En una alternativa de realización de la pizarra (figura 2), la misma puede incluir una lámina de vidrio templado (1) y una lámina de vidrio normal (1'), estando la lámina de vidrio templado (1) dotada del correspondiente mateado en su cara (2) constituyendo la superficie de escritura, mientras que entre ambas láminas de vidrio (1-1') se dispone una lámina o film de plástico (4), preferentemente de polivinil butiral, que se constituye en elemento de unión y al mismo tiempo produce el grado de opacidad necesario, para lo cual dicho film de PVB estará coloreado, preferentemente en color blanco.In an alternative embodiment of the slate (Figure 2), it can include a tempered glass sheet (1) and a normal glass sheet (1 '), the tempered glass sheet (1) being provided with the corresponding matte in its face (2) constituting the writing surface, while between both sheets of glass (1-1 ') there is a plastic sheet or film (4), preferably polyvinyl butyral, which is constituted as a connecting element and at the same time it produces the necessary degree of opacity, for which said PVB film will be colored, preferably in white color.
La pizarra fabricada según la realización mostrada en la figura 2, tendrá las características del vidrio laminado y, consecuentemente, la de que en caso de rotura los trozos de vidrio no se desprenden, sino que permanecen unidos al elemento de unión o film de PVB.The slate manufactured according to the embodiment shown in Figure 2, will have the characteristics of the glass laminated and, consequently, that in case of breakage the pieces of glass do not come off, but remain attached to the joining element or PVB film.
Como antes se ha indicado, para conseguir la opacidad es necesario que la lámina de plástico o film (4) sea de color blanco, preferentemente.As indicated above, to achieve opacity it is necessary that the plastic sheet or film (4) be white, preferably.
En una tercera forma de realización, mostrada en la figura 3, la pizarra incluye, como en el caso anterior, dos láminas de vidrio (1-1'), la primera de vidrio templado y la segunda de vidrio normal. La lámina de vidrio templado (1) está mateada por la cara (2) de escritura y presente un serigrafiado (3') por el lado opuesto. La unión de las dos láminas de vidrio se realiza con film de plástico apropiado (4'), por ejemplo con film de PVB que, en este caso, será transparente, por cuanto opera única y exclusivamente como nexo de unión de las dos láminas de vidrio. In a third embodiment, shown in Figure 3, the board includes, as in the previous case, two sheets of glass (1-1 '), the first of tempered glass and the second of normal glass. The tempered glass sheet (1) is matted on the writing face (2) and has a screen print (3 ') on the opposite side. The joining of the two glass sheets is carried out with appropriate plastic film (4 '), for example with PVB film which, in this case, will be transparent, since it operates only and exclusively as a link between the two sheets of glass.

Claims

R E I V I N D I C A C I O N E SR E I V I N D I C A C I O N E S
1§.- Procedimiento de fabricación de pizarras, que estando concebido para obtener una pizarra con una superficie de escritura sin reflejos, en la que son fácilmente eliminables los caracteres escritos y/o manchas de cualquier índole, superficie que incluso puede utilizarse para visualizar diapositivas, se caracteriza porque, a partir de una lámina de vidrio de espesor que permita su templado, con las dimensiones apropiadas a la pizarra a obtener, comprende las siguientes fases operativas:1 § .- Blackboard manufacturing procedure, which being designed to obtain a blackboard with a writing surface without reflections, in which written characters and / or spots of any kind are easily removable, surface that can even be used to display slides , is characterized in that, from a thick glass sheet that allows its tempering, with the appropriate dimensions to the slate to be obtained, it comprises the following operational phases:
- mateado o deslucido de, al menos, la cara que se va a utilizar como superficie de escritura;- matte or lackluster of at least the face to be used as a writing surface;
- pulido de los cantos de la lámina de vidrio;- polishing the edges of the glass sheet;
- aplicación por serigrafiado en la cara opuesta a la de escritura de un esmalte vitrificable, de espesor apropiado, para conseguir la opacidad necesaria;- application by screen printing on the opposite side of the writing of a vitrifiable enamel, of appropriate thickness, to achieve the necessary opacity;
- templado del vidrio, en cuya operación se consigue a la vez la fijación permanente de la capa de esmalte vitrificable;- tempered glass, in whose operation the permanent fixation of the vitrifiable enamel layer is achieved at the same time;
2§.- Procedimiento de fabricación de pizarras, según reivindicación 1§, caracterizado porque ambas caras de la lámina de vidrio templado son sometidas al proceso de mateado. § 2 .- Method of manufacturing boards according to claim 1 §, wherein both surfaces of the tempered glass sheet are subjected to the matting process.
3a.- Procedimiento de fabricación de pizarras, según reivindicaciones anteriores, caracterizado porque sobre una cualquiera de las caras mateadas de la lámina de vidrio templado se aplica una serigrafía a base de un pintado con esmalte apropiado, para obtener la capa de opacidad.3a.- Blackboard manufacturing process, according to previous claims, characterized in that a serigraphy is applied on any one of the matt faces of the tempered glass sheet based on a painted with appropriate enamel, to obtain the opacity layer.
43.- Procedimiento de fabricación de pizarras, según reivindicación la, caracterizado porque sobre la cara de vidrio templado y mateado que presenta la serigrafía de opacidad se dispone y fija una segunda lámina de vidrio normal.43.- Blackboard manufacturing process, according to claim la, characterized in that a second sheet of normal glass is arranged and fixed on the face of tempered and matte glass which has the opacity screen printing.
5a.- Procedimiento de fabricación de pizarras, según reivindicación 4§, caracterizado porque entre la lámina de vidrio templado y la lámina de vidrio normal se aplica una lámina o film de plástico, preferentemente de color blanco, a base de polivinil butiral, que opera como nexo de unión de las dos láminas de vidrio y produce el grado de opacidad requerido.5th.- Blackboard manufacturing process, according to claim 4 § , characterized in that between the tempered glass sheet and the normal glass sheet a plastic sheet or film is applied, preferably white, based on polyvinyl butyral, which operates as a link between the two sheets of glass and produces the degree of opacity required.
63.- Pizarra obtenida de acuerdo con el procedimiento de las reivindicaciones anteriores, caracterizada porque está constituida por una lámina de vidrio templado (1)/ de espesor comprendido preferentemente entre 3 y 6 mm, con una configuración y dimensiones cualesquiera, con su cara de escritura (2) mateada, y la cara opuesta (2') dotada de una capa de opacidad (3) constituida por una serigrafía a base de un esmalte vitrificable.63.- Slate obtained according to the procedure of the preceding claims, characterized in that it is constituted by a sheet of tempered glass (1) / thickness preferably between 3 and 6 mm, with any configuration and dimensions, with its face of writing (2) matt, and the opposite side (2 ') provided with a layer of opacity (3) consisting of a silkscreen based on a vitrifiable enamel.
7§.- Pizarra, según reivindicación 7§, caracterizada porque está constituida por dos láminas de vidrio (1-1'), la primera de ellas de vidrio templado y la segunda de vidrio normal, y entre ellas una capa de plástico (4) constituyendo la capa de opacidad y el medio de unión entre ambas láminas de vidrio (1-1'), estando la cara externa de la lámina de vidrio templado (1) dotada de un mateado (2) constituyendo la superficie de escritura.7 § .- Slate according to claim 7§, characterized in that it is constituted by two sheets of glass (1-1 '), the first one of tempered glass and the second of normal glass, and among them a layer of plastic (4 ) constituting the opacity layer and the joining means between both glass sheets (1-1 '), the outer face of the tempered glass sheet (1) being provided with a matt (2) constituting the surface of writing.
83.- Pizarra, según reivindicación 73, caracterizada porque está constituida por dos láminas de vidrio (1-1'), la primera de ellas de vidrio templado y la segunda de vidrio normal, y entre ellas dos capas superpuestas (3 '-4'), la primera determinante de la opacidad y constituida con una serigrafía a base de esmalte vitrificable, y la segunda constituida en material plástico transparente, como medio de unión de las láminas de vidrio, con la particularidad de que sobre la superficie externa de la lámina de vidrio templado (1) está realizado un mateado (2) determinando la superficie de escritura. 83.- Slate, according to claim 73, characterized in that it is constituted by two sheets of glass (1-1 '), the first one of tempered glass and the second of normal glass, and between them two superimposed layers (3' -4 '), the first determinant of opacity and constituted with a silkscreen based on vitrifiable enamel, and the second constituted in transparent plastic material, as a means of joining the glass sheets, with the particularity that on the external surface of the Tempered glass sheet (1) is made a matt (2) determining the writing surface.
PCT/ES1998/000315 1998-11-19 1998-11-19 Process for fabricating a writing board, and writing board obtained with such process WO2000030867A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AT98954496T ATE248717T1 (en) 1998-11-19 1998-11-19 PRODUCTION METHOD OF WRITING BOARD AND WRITING BOARD PRODUCED THEREFROM
EP98954496A EP1057657B1 (en) 1998-11-19 1998-11-19 Process for fabricating a writing board, and writing board obtained with such process
PCT/ES1998/000315 WO2000030867A1 (en) 1998-11-19 1998-11-19 Process for fabricating a writing board, and writing board obtained with such process
ES98954496T ES2207003T3 (en) 1998-11-19 1998-11-19 MANUFACTURING PROCEDURE OF A SLATE AND SLATE OBTAINED WITH SUCH PROCEDURE.
DE69817880T DE69817880D1 (en) 1998-11-19 1998-11-19 MANUFACTURING METHOD OF WRITING BOARD, AND WRITING BOARD THEREFOR

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/ES1998/000315 WO2000030867A1 (en) 1998-11-19 1998-11-19 Process for fabricating a writing board, and writing board obtained with such process

Publications (1)

Publication Number Publication Date
WO2000030867A1 true WO2000030867A1 (en) 2000-06-02

Family

ID=8302798

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ES1998/000315 WO2000030867A1 (en) 1998-11-19 1998-11-19 Process for fabricating a writing board, and writing board obtained with such process

Country Status (5)

Country Link
EP (1) EP1057657B1 (en)
AT (1) ATE248717T1 (en)
DE (1) DE69817880D1 (en)
ES (1) ES2207003T3 (en)
WO (1) WO2000030867A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108638708A (en) * 2018-07-22 2018-10-12 宁波赞扬文具有限公司 A kind of multifunctional plastic board and preparation method thereof

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1016588A3 (en) 2005-05-13 2007-02-06 Polyvision Nv METHOD FOR MANUFACTURING A VISUAL COMMUNICATION BOARD.
CH699483A1 (en) * 2008-09-01 2010-03-15 Troesch Glas Ag Re-writable ferromagnetic device e.g. writing board marking device, for presentation and teaching purpose in e.g. school, has front glass plate whose thickness is made to be small such that attractive force stays at active surface
ES2565691B1 (en) * 2014-10-02 2017-01-13 Imagina Concepto Industrial, S.L.U. Multifunctional glass coating, system with coating and use of coating

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB500443A (en) * 1937-10-20 1939-02-09 Percy Rowed Lang Improvements relating to slates, blackboards, and other repeatedly useable writing boards and tablets
EP0033352A1 (en) * 1980-02-01 1981-08-12 Weyel KG Writing board, in particular large wallboard
ES1002753U (en) * 1987-06-29 1988-06-16 R.B. Disenos, S.A. Y Cristales Curvados, S.A. (Cricursa) Panel mural whiteboard feature (Machine-translation by Google Translate, not legally binding)

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB500443A (en) * 1937-10-20 1939-02-09 Percy Rowed Lang Improvements relating to slates, blackboards, and other repeatedly useable writing boards and tablets
EP0033352A1 (en) * 1980-02-01 1981-08-12 Weyel KG Writing board, in particular large wallboard
ES1002753U (en) * 1987-06-29 1988-06-16 R.B. Disenos, S.A. Y Cristales Curvados, S.A. (Cricursa) Panel mural whiteboard feature (Machine-translation by Google Translate, not legally binding)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108638708A (en) * 2018-07-22 2018-10-12 宁波赞扬文具有限公司 A kind of multifunctional plastic board and preparation method thereof

Also Published As

Publication number Publication date
ES2207003T3 (en) 2004-05-16
EP1057657A1 (en) 2000-12-06
EP1057657B1 (en) 2003-09-03
ATE248717T1 (en) 2003-09-15
DE69817880D1 (en) 2003-10-09

Similar Documents

Publication Publication Date Title
US5901484A (en) Manually operated moveable display device
WO2000030867A1 (en) Process for fabricating a writing board, and writing board obtained with such process
DE19506049A1 (en) Frame for pictures, documents or decorative exhibits
US5546685A (en) Display apparatus for desired items with easy exchange of desired items, and with protection from ultra-violet light
US2294465A (en) Printed article
US20200275789A1 (en) Frame configured to easily replace exhibit
ES2205587T3 (en) PROTECTIVE SHEET TO PROTECT AND FRAME GRAPHIC OBJECTS.
DK1436151T3 (en) Variable-looking glass tile
US2208001A (en) Holder for composite photographs
JP2003264070A5 (en)
US20220125222A1 (en) Frame
JP3131550U7 (en)
WO2000027630A1 (en) Process for producing a body having printed images, and body obtained by such process
US1291879A (en) Building unit.
JP2504893B2 (en) Bulletin sheet
JP3131550U (en) Panel structure and display structure in panel-type lighting display device
GB2107501A (en) Price tickets
JP2744538B2 (en) Plaque
US552584A (en) School-slate
JPS6023373B2 (en) Character board for character input device
JPS5855411Y2 (en) Transparent display materials used for advertisements, promotions, etc.
KR970001801Y1 (en) A menu panel in a restaurant
US3525171A (en) Display means
EP0435407B1 (en) Device for the attachment of a sheet onto a backing
JPH0443358Y2 (en)

Legal Events

Date Code Title Description
AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE

WWE Wipo information: entry into national phase

Ref document number: 1998954496

Country of ref document: EP

121 Ep: the epo has been informed by wipo that ep was designated in this application
WWP Wipo information: published in national office

Ref document number: 1998954496

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: CA

WWG Wipo information: grant in national office

Ref document number: 1998954496

Country of ref document: EP