EP1057657B1 - 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 PDFInfo
- Publication number
- EP1057657B1 EP1057657B1 EP98954496A EP98954496A EP1057657B1 EP 1057657 B1 EP1057657 B1 EP 1057657B1 EP 98954496 A EP98954496 A EP 98954496A EP 98954496 A EP98954496 A EP 98954496A EP 1057657 B1 EP1057657 B1 EP 1057657B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- writing
- glass sheet
- procedure
- glass
- board
- Prior art date
- 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.)
- Expired - Lifetime
Links
Images
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 procedure for obtaining a glass writing board, in which writing is performed by means of a marker or a similar tool, with its main characteristic being that said surface is matted or dulled in order to prevent reflections or glare, allowing said surface to be complementarily used for viewing slides.
- a further object of the invention is the make up or structure of the board obtained according to said procedure, which board is mainly composed of a tempered glass sheet with its writing surface matted and provided on the opposite side with an opaque layer, which may be of a different nature or even be complemented by more different boards or layers.
- plastic boards normally white in colour
- characters may be written using a specific marker, with such characters easily removed by a suitable eraser.
- GB 500 443 A discloses a glass writing board with a roughened front surface and a rear surface coated with a dark pigment.
- the invention relates to a manufacturing procedure for a writing board, as well as to the structure of the board thus obtained, which shows all advantages of this type of boards but none of their disadvantages, as it does not reflect light nor therefore images, and withstands any solvent except hydrofluoric acid, being highly durable and practically undegradable over time and use, and which can be used as a projection screen for slides without glare or reflections, all of this due to said board being obtained from a matted tempered glass sheet as will be described throughout the present description.
- the procedure for obtaining or manufacturing the board is based on the following operative stages:
- the matting creates a roughness or porosity of the surface which reduces or even eliminates reflections, such that the treated surface does not reflect images nor cause glare.
- the most effective matting is achieved using acid, as this method results in a fine and evenly distributed porosity or roughness throughout the entire surface.
- the coarsest matting and also the cheapest is obtained with suitable rollers in the rolling lamination process of the glass.
- Sand matting is an intermediate solution as regards quality and price.
- vitrifiable paint is applied, or an opaque layer applied by serigraphy or any other means on the opposite surface to the matted writing surface.
- the glass is tempered so that in this tempering a double effect is achieved; on one hand the enamel is vitrified, so that it is permanently attached to the glass, and the tempering itself is achieved.
- the board thus obtained is of tempered glass, so that in the event of breaking it shatters into many particles.
- a matting or dulling process may be performed on both faces of the tempered glass sheet, with the opaque layer applied to either face, said layer consisting of a vitrifiable enamel applied with serigraphy.
- the procedure may employ two glass sheets, one tempered and the other of normal glass, so that the first one is matted to form the writing surface, with the two surfaces joined as usual by a suitable layer of plastic, preferably polyvinyl butyral (PVB), which layer in turn determines the board's opacity, for which purpose it shall be coloured, preferably in white.
- a suitable layer of plastic preferably polyvinyl butyral (PVB), which layer in turn determines the board's opacity, for which purpose it shall be coloured, preferably in white.
- the tempered and matted glass sheet prefferably be serigraphed on the face opposite the writing surface and the union to the normal glass sheet to be performed using transparent PVB, which in this case will act as a union between the two glass sheets, as the opacity will be provided by serigraphy.
- a section of part of a board can be seen comprising a tempered glass sheet (1) whose two surfaces (2, 2') have been matted to prevent glare or reflection on the surface of faces (2, 2'), with one of these surfaces provided with a vitrifiable enamel layer (3) applied by serigraphy, all of this such that face (2) comprises the writing surface and layer (3) applied to the opposite face (2') determines the opacity of the board.
- the board may consist of a tempered glass sheet (1) and a normal glass sheet (1'), with the tempered glass sheet (1) provided with the corresponding matting on its surface (2) which makes up the writing surface, while between the two glass sheets (1, 1') is provided a plastic layer (4), preferably of polyvinyl butyral which acts as a junction element and also provides the required degree of opacity for which said PVB layer shall be coloured, preferably white.
- the board obtained according to the embodiment of figure 2 will have the properties of tempered glass, so that in the event of breaking the glass segments will not become loose but will remain joined to the junction element or PVB layer.
- the opacity is obtained by colouring the plastic layer (4), preferably white.
- the board includes as in the above cases two glass sheets (1, 1'), the first tempered and the second normal. Tempered glass sheet (1) is matted on writing surface (2) and is provided with a serigraphed surface (3') on the opposite surface. The two glass sheets are joined by means of a suitable plastic layer (4'), such as PVB, which in this case will be transparent as it functions solely as a junction of the two glass sheets.
- a suitable plastic layer (4') such as PVB, which in this case will be transparent as it functions solely as a junction of the two glass sheets.
Landscapes
- Drawing Aids And Blackboards (AREA)
- Joining Of Glass To Other Materials (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
Description
- with time and use, they normally suffer a degradation which normally ends in the board resulting useless.
- writing must always be performed using a specific marker.
- the writing surface, as it is made of plastic materials, does not withstand certain solvents such as acetone, alcohol, etc. and obviously even less certain acids.
- as a result of the above, elimination of marks or stains caused by an unspecific marker or by any other means is difficult.
- the board surface causes glare or reflections which make it unsuitable for use, for example, as a projection screen for slides.
- A glass sheet of a thickness which allows tempering and of a size conforming to the writing board to be obtained is subjected to a matting process on at least one of its two faces, this matting performed using any known means, whether by acid (using hydrofluoric acid), sand (by blasting sand on the surface to be matted) or mechanically in hot during the rolling lamination process of the glass.
- Afterwards the glass edges are polished to eliminate any sharp edges.
Claims (8)
- Procedure for obtaining writing boards, designed to obtain a glare free surface in which writing marks or stains of any kind are easily removed, which surface may also be used to project slides, using a glass sheet of a thickness which allows tempering, of a size according to the board to be obtained, said procedure comprising the following operative stages:Matting or dulling of at least the surface to be used for writing;Polishing of the glass sheet edges;Application by serigraphy to the surface opposite the writing surface of a vitrifiable enamel of a suitable thickness, to obtain the required opacity;Tempering of the glass, in which operation the vitrifiable enamel layer is permanently attached.
- Procedure for obtaining writing boards, as claimed in claim 1, characterised in that both surfaces of the tempered glass sheet are subjected to the matting process.
- Procedure for obtaining writing boards, as claimed in above claims, characterised in that on either matted surface of the tempered glass sheet is applied a serigraphy using a suitable enamel, in order to obtain the opaque layer.
- Procedure for obtaining writing boards, as claimed in claim 1, characterised in that on the tempered and matted glass sheet with the opaque serigraphy is provided and attached a second sheet of normal glass.
- Procedure for obtaining writing boards, as claimed in claim 4, characterised in that between the tempered glass sheet and the normal glass sheet is applied a thin layer of plastic, preferably white in colour, of polyvinyl butyral, which acts as a means of attaching the two glass sheets and provides the required degree of opacity.
- Writing board obtainable according to the procedure of the above claim 1, characterised in that it comprises a tempered glass sheet (1), of thickness preferably between 3 and 6 mm, with any size and shape, with its writing surface (2) matted and the opposite surface (2') provided with an opaque layer (3) consisting of serigraphy with vitrifiable enamel.
- Writing board, obtainable according to the procedure of claim 5, characterised in that it comprises two glass sheets (1, 1') the first of which is of tempered glass and the second of normal glass, and between them a layer of plastic (4) which provides the opacity and the attachment means for the two glass sheets (1, 1'), with the outer surface of tempered glass sheet (1) provided with a matting (2) which comprises the writing surface.
- Writing board, obtainable according to the procedure of claim 5, characterised in that it comprises two glass sheets (1,1') the first of which is of tempered glass and the second of normal glass, and between them two superimposed layers (3', 4') the first of which determines the opacity and consisting of a serigraphy with vitrifiable enamel, and the second one made of a transparent plastic material, acting as a means of attachment of the two glass sheets, so that the outer surface of tempered glass sheet (1) is provided with a matting (2) which determines the writing surface.
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 (2)
Publication Number | Publication Date |
---|---|
EP1057657A1 EP1057657A1 (en) | 2000-12-06 |
EP1057657B1 true EP1057657B1 (en) | 2003-09-03 |
Family
ID=8302798
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98954496A Expired - Lifetime EP1057657B1 (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) |
Families Citing this family (4)
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 |
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 |
Family Cites Families (3)
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 |
EP0033352B1 (en) * | 1980-02-01 | 1984-07-11 | Weyel KG | Writing board, in particular large wallboard |
ES1002753Y (en) * | 1987-06-29 | 1989-02-01 | R.B. Disenos, S.A. Y Cristales Curvados, S.A. (Cricursa) | WALL PANEL IN FUNCTION OF SLATE |
-
1998
- 1998-11-19 DE DE69817880T patent/DE69817880D1/en not_active Expired - Lifetime
- 1998-11-19 EP EP98954496A patent/EP1057657B1/en not_active Expired - Lifetime
- 1998-11-19 WO PCT/ES1998/000315 patent/WO2000030867A1/en active IP Right Grant
- 1998-11-19 AT AT98954496T patent/ATE248717T1/en not_active IP Right Cessation
- 1998-11-19 ES ES98954496T patent/ES2207003T3/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP1057657A1 (en) | 2000-12-06 |
DE69817880D1 (en) | 2003-10-09 |
ATE248717T1 (en) | 2003-09-15 |
WO2000030867A1 (en) | 2000-06-02 |
ES2207003T3 (en) | 2004-05-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR20160094429A (en) | Durable glass articles for use as writable erasable marker boards | |
US2053173A (en) | Shadow producing screen for luminous projections and other applications and process for its manufacture | |
AT414051B (en) | PROJECTION WALL WITH A GLASS SCREEN | |
JP3727970B2 (en) | Glass laminates with interchangeable sacrificial layers | |
US20190168488A1 (en) | Composite pane having a multiple-ply composite layer and method for production thereof | |
DE69025019T2 (en) | Process for producing a glass with a functional coating | |
US3652370A (en) | Dazzle-preventing and heat-blocking glass sheet | |
EP0852999A3 (en) | Sound absorbing article and method of making same | |
EP1111410A3 (en) | Infrared absorption filter | |
DE69230417T2 (en) | Laminated glass pane | |
ATE161524T1 (en) | GLASS PANEL WITH A FUNCTIONAL LAYER | |
CN111372774A (en) | Laminated glass with inlay covering having excellent strength and optical quality | |
EP1057657B1 (en) | Process for fabricating a writing board, and writing board obtained with such process | |
DE102018004176A1 (en) | Printed-circuit board, manufacture thereof and display device | |
US5959793A (en) | Laminated safety mirror with reflective coating adjacent the bonding layer | |
DE3818557C2 (en) | ||
US2185018A (en) | Polarizing structure | |
US4813990A (en) | Method of making a bevelled glass assembly | |
DE112018001515T5 (en) | Vehicle windshield and object for a vehicle | |
EP0403311A3 (en) | A recording sheet for use in image forming apparatus, a method and an apparatus for forming an image | |
US1802169A (en) | Ornamental composite glass | |
DE102022105377A1 (en) | VEHICLE WINDOW WITH ON-BOARD CAMERA | |
US11331884B2 (en) | Decorative design element in black print | |
DE112018001866T5 (en) | Front square side window of a vehicle | |
KR101613085B1 (en) | both-side anti-glare glass screen combination chalkboard and manufacturing method thereof |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20000703 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: GUARDIAN LLODIO, S.L. |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20030903 Ref country code: LI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20030903 Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT Effective date: 20030903 Ref country code: FR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20030903 Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20030903 Ref country code: CH Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20030903 Ref country code: BE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20030903 Ref country code: AT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20030903 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REF | Corresponds to: |
Ref document number: 69817880 Country of ref document: DE Date of ref document: 20031009 Kind code of ref document: P |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20031119 Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20031119 Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20031119 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MC Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20031130 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20031203 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20031203 Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20031203 Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20031203 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20031204 |
|
NLV1 | Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act | ||
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20040203 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2207003 Country of ref document: ES Kind code of ref document: T3 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20031203 |
|
26N | No opposition filed |
Effective date: 20040604 |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: MM4A |
|
EN | Fr: translation not filed | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20041018 Year of fee payment: 7 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20051121 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20051121 |