WO1999021061A1 - Watch crystal provided with a mark and watch comprising same - Google Patents

Watch crystal provided with a mark and watch comprising same Download PDF

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Publication number
WO1999021061A1
WO1999021061A1 PCT/CH1998/000440 CH9800440W WO9921061A1 WO 1999021061 A1 WO1999021061 A1 WO 1999021061A1 CH 9800440 W CH9800440 W CH 9800440W WO 9921061 A1 WO9921061 A1 WO 9921061A1
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WO
WIPO (PCT)
Prior art keywords
watch
crystal
pattern
point
impacts
Prior art date
Application number
PCT/CH1998/000440
Other languages
French (fr)
Inventor
Sandro Albertani
Rémy BRANDLI
Attilio Vicario
Original Assignee
Montres Rolex 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 Montres Rolex S.A. filed Critical Montres Rolex S.A.
Publication of WO1999021061A1 publication Critical patent/WO1999021061A1/en

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B45/00—Time pieces of which the indicating means or cases provoke special effects, e.g. aesthetic effects
    • G04B45/0084—Pictures or inscriptions on the case or parts thereof, attaching complete pictures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/262—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used recording or marking of inorganic surfaces or materials, e.g. glass, metal, or ceramics
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B39/00—Watch crystals; Fastening or sealing of crystals; Clock glasses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used

Definitions

  • the present invention relates to a watch crystal provided with an indelible marking.
  • It also relates to a watch equipped with a crystal provided with an indelible marking.
  • the crystals of watches are made of synthetic or mineral glass, diamond or any other transparent material.
  • these glasses can be marked by engraving.
  • the marking can correspond to a trade mark, a serial number to identify a production, a purely aesthetic decoration, a personalized code affixed to allow identification in the event of theft or any other application. Whatever its use, this marking is obtained by engraving the surface of the glass on its outer face or on its inner face.
  • the engraving technique used may vary depending on the application. All the methods going from mechanical engraving to chemical engraving via laser engraving can a priori be considered.
  • the present invention proposes to overcome these drawbacks by proposing a watch crystal and a watch fitted with such a crystal which has no roughness on any of its faces and which has an indelible marking which may be visible or invisible to the eye. bare.
  • This glass is characterized in that, in its thickness, it comprises at least one point impact made by laser without the surface condition of its interior and exterior faces being modified.
  • it comprises in its thickness a series of punctual impacts, and said impacts are arranged to form a pattern.
  • each impact is formed by a modification of the crystal structure of the material in which said glass is made, said modification of structure causing a change in appearance of said material.
  • said point impacts are juxtaposed to form said pattern.
  • the watch according to the invention is characterized in that the crystal comprises, in its thickness, at least one point impact made by laser without the surface condition of its inner and outer faces being modified This crystal can also include a series of 'point impacts made by laser, said impacts being arranged to form a pattern.
  • This pattern can have all the characteristics defined above.
  • FIG. 1 represents a watch crystal according to the invention comprising a decorative pattern constituting for example a logo,
  • FIG. 2 represents an enlarged median cross-section of the glass of FIG. 1,
  • FIG. 3 represents an enlarged view of a series of punctual impacts made in the thickness of the material of a watch crystal
  • FIG. 4 represents an enlarged view of the pattern of the glass of FIG. 1.
  • a watch glass 10, made of synthetic or mineral glass, diamond or any other transparent material has a pattern 11 made in the thickness e of said glass.
  • This pattern 11 is composed of a series of punctual impacts 12 juxtaposed. These impacts having a star shape are obtained by means of a laser beam which is focused at a point located in the thickness of the ice without the surface condition of its inner 13 and outer 14 faces being changed.
  • the energy of beam, concentrated at one point makes it possible to modify at this point the crystalline structure of the material in which the ice is produced and thus to create an opaque or less transparent impact zone, which makes it visible.
  • This modified zone depending on its importance, can be visible either with the naked eye or by means of a magnifying glass.
  • the distance d between two adjacent point impacts 12 is substantially equal to the sum of the cross section a of an impact and an interval i which constitutes a safety margin avoiding overlapping or at least one direct juxtaposition of two neighboring impacts.
  • the interval i is preferably different from zero to avoid that the achievement of close impacts does not cause embrittlement of the ice.
  • the formation of the pattern 11, such as for example the logo represented by FIG. 4, is obtained by the creation of a succession of punctual impacts 12 ordered in an appropriate manner.
  • ad hoc impacts can occur on different levels. They could also be directly juxtaposed so that a succession of impacts appears as a solid line.
  • the motif represented can have a purely aesthetic function or define a marking for commercial purposes.
  • This pattern visible or invisible to the naked eye can also constitute a personalized identification code intended to characterize the object in the event of theft.
  • This identification code by marking may also consist of only one impact positioned at a predetermined location in the ice.

Abstract

The invention concerns a watch crystal provided with a permanent mark and a watch comprising such a crystal. In order to produce said mark, the crystal (10) includes in its thickness (e) a series of impact points (12) arranged to form a pattern (11) without modification of the inner (13) and outer (14) surface condition. Each impact point (12) is obtained by means of a laser beam focused on a point located in the crystal thickness. The beam energy, concentrated in one point, produces at this point a modification of the crystal structure of the material, said modification causing a change in the appearance of the material. Said permanent mark can be produced in any watch crystal, in particular made of mineral or synthetic glass, or sapphire, for decorative, personalization or security purposes.

Description

GLACE DE MONTRE POURVUE D'UN MARQUAGE ET MONTRE EQUIPEE D'UNE TELLE GLACEWATCH ICE WITH MARKING AND WATCH PROVIDED WITH SUCH ICE
Domaine technique La présente invention concerne une glace de montre pourvue d'un marquage indélébile.Technical Field The present invention relates to a watch crystal provided with an indelible marking.
Elle concerne également une montre équipée d'une glace pourvue d'un marquage indélébile.It also relates to a watch equipped with a crystal provided with an indelible marking.
Techniques antérieuresPrevious techniques
Les glaces des montres, notamment des montres-bracelets connues, sont réalisées en verre synthétique ou minéral, en diamant ou en tout autre matériau transparent. Pour différentes raisons ces glaces peuvent être marquées par gravage. Le marquage peut correspondre à une marque commerciale, un numéro de série pour identifier une fabrication, une décoration à caractère purement esthétique, un code personnalisé apposé pour permettre une identification en cas de vol ou toute autre application. Quel que soit son usage, ce marquage est obtenu par gravage de la surface de la glace sur sa face extérieure ou sur sa face intérieure. La technique de gravage utilisée peut varier selon les applications. Toutes les méthodes allant du gravage mécanique au gravage chimique en passant par le gravage au laser peuvent a priori être envisagées.The crystals of watches, in particular known wristwatches, are made of synthetic or mineral glass, diamond or any other transparent material. For different reasons these glasses can be marked by engraving. The marking can correspond to a trade mark, a serial number to identify a production, a purely aesthetic decoration, a personalized code affixed to allow identification in the event of theft or any other application. Whatever its use, this marking is obtained by engraving the surface of the glass on its outer face or on its inner face. The engraving technique used may vary depending on the application. All the methods going from mechanical engraving to chemical engraving via laser engraving can a priori be considered.
Le marquage superficiel présente des inconvénients qui sont à la fois d'ordre esthétique et d'ordre fonctionnel. En effet, le gravage détruit partiellement l'état de surface de la glace, ce qui rend le toucher désagréable lorsque le marquage est effectué à l'extérieur. Le gravage par enlèvement de matière peut fragiliser la glace et la rendre cassante. En outre, ce marquage n'est pas indélébile, de sorte qu'il ne peut pas offrir une garantie absolue en vue d'une identification tout à fait certaine. Ces inconvénients sont totalement inacceptables sur des montres haut de gamme. De ce fait le procédé de marquage par un code destiné à permettre l'identification d'une montre de grande valeur volée, tel qu'il a été proposé il y a quelques années, n'a pas connu un véritable succès commercial, bien qu'il présente un véritable intérêt, en particulier pour les compagnies d'assurances.Surface marking has drawbacks which are both aesthetic and functional. Indeed, the engraving partially destroys the surface condition of the crystal, which makes the feel unpleasant when the marking is done outside. Etching by removing material can weaken the glass and make it brittle. Furthermore, this marking is not indelible, so that it cannot offer an absolute guarantee with a view to completely certain identification. These drawbacks are completely unacceptable on high-end watches. As a result, the method of marking by a code intended to allow the identification of a high-value stolen watch, as it was proposed a few years ago, has not met with real commercial success, although 'it is of real interest, especially for insurance companies.
Exposé de l'inventionStatement of the invention
La présente invention se propose de pallier ces inconvénients en proposant une glace de montre et une montre équipée d'une telle glace qui ne présente aucune aspérité sur aucune de ses faces et qui comporte un marquage indélébile qui peut être visible ou invisible à l'oeil nu.The present invention proposes to overcome these drawbacks by proposing a watch crystal and a watch fitted with such a crystal which has no roughness on any of its faces and which has an indelible marking which may be visible or invisible to the eye. bare.
Cette glace est caractérisée en ce qu'elle comporte dans son épaisseur au moins un impact ponctuel effectué au laser sans que l'état de surface de ses faces intérieure et extérieure soit modifié.This glass is characterized in that, in its thickness, it comprises at least one point impact made by laser without the surface condition of its interior and exterior faces being modified.
Selon un mode de réalisation préféré, elle comporte dans son épaisseur une série d'impacts ponctuels, et lesdits impacts sont agencés pour former un motif.According to a preferred embodiment, it comprises in its thickness a series of punctual impacts, and said impacts are arranged to form a pattern.
D'une manière particulièrement avantageuse, chaque impact est formé par une modification de la structure cristalline de la matière dans laquelle est réalisée ladite glace, ladite modification de structure provoquant un changement d'aspect de ladite matière.In a particularly advantageous manner, each impact is formed by a modification of the crystal structure of the material in which said glass is made, said modification of structure causing a change in appearance of said material.
De préférence, lesdits impacts ponctuels sont juxtaposés pour former ledit motif.Preferably, said point impacts are juxtaposed to form said pattern.
Ce motif peut être décoratif. Il peut également constituer un code d'identification personnalisé. Il peut enfin correspondre à une marque commerciale. Dans tous les cas il peut être visible ou invisible à l'oeil nu. La montre selon l'invention est caractérisée en ce que la glace comporte, dans son épaisseur, au moins un impact ponctuel effectué au laser sans que l'état de surface de ses faces intérieure et extérieure soit modifié Cette glace peut également comporter une série d'impacts ponctuels effectués au laser, lesdits impacts étant agencés pour former un motif.This pattern can be decorative. It can also constitute a personalized identification code. Finally, it can correspond to a trademark. In all cases it can be visible or invisible to the naked eye. The watch according to the invention is characterized in that the crystal comprises, in its thickness, at least one point impact made by laser without the surface condition of its inner and outer faces being modified This crystal can also include a series of 'point impacts made by laser, said impacts being arranged to form a pattern.
Ce motif peut avoir toutes les caractéristiques définies ci-dessus.This pattern can have all the characteristics defined above.
Description sommaire des dessins La présente invention sera mieux comprise en référence à la description d'une forme de réalisation préférée et des dessins annexés donnés à titre d'exemple non limitatif et dans lesquels :Brief description of the drawings The present invention will be better understood with reference to the description of a preferred embodiment and the attached drawings given by way of non-limiting example and in which:
la figure 1 représente une glace de montre selon l'invention comportant un motif décoratif constituant par exemple un logo,FIG. 1 represents a watch crystal according to the invention comprising a decorative pattern constituting for example a logo,
la figure 2 représente une coupe transversale médiane agrandie de la glace de la figure 1 ,FIG. 2 represents an enlarged median cross-section of the glass of FIG. 1,
la figure 3 représente une vue agrandie d'une série d'impacts ponctuels réalisés dans l'épaisseur de la matière d'une glace de montre, etFIG. 3 represents an enlarged view of a series of punctual impacts made in the thickness of the material of a watch crystal, and
la figure 4 représente une vue agrandie du motif de la glace de la figure 1.FIG. 4 represents an enlarged view of the pattern of the glass of FIG. 1.
Meilleure manière de réaliser l'inventionBest way to realize the invention
En référence aux figures 1 et 2, une glace de montre 10, réalisée en verre synthétique ou minéral, en diamant ou en tout autre matériau transparent comporte un motif 11 réalisé dans l'épaisseur e de ladite glace. Ce motif 11 est composé d'une série d'impacts ponctuels 12 juxtaposés. Ces impacts présentant une forme d'étoile sont obtenus au moyen d'un faisceau laser qui est focalisé en un point situé dans l'épaisseur de la glace sans que l'état de surface de ses faces intérieure 13 et extérieure 14 soit modifié. L'énergie du faisceau, concentrée en un point, permet de modifier en ce point la structure cristalline de la matière dans laquelle la glace est réalisée et de créer ainsi une zone d'impact opaque ou ayant une transparence moindre, ce qui permet de la rendre apparente. Cette zone modifiée, suivant son importance, peut être visible soit à l'oeil nu soit au moyen d'un verre grossissant. Selon l'énergie et la focalisation du faisceau utilisées, il est possible de varier la profondeur de l'impact ponctuel dans l'épaisseur e de la glace 10. De ce fait les points d'impact ponctuels 12 peuvent se situer à différents niveaux.Referring to Figures 1 and 2, a watch glass 10, made of synthetic or mineral glass, diamond or any other transparent material has a pattern 11 made in the thickness e of said glass. This pattern 11 is composed of a series of punctual impacts 12 juxtaposed. These impacts having a star shape are obtained by means of a laser beam which is focused at a point located in the thickness of the ice without the surface condition of its inner 13 and outer 14 faces being changed. The energy of beam, concentrated at one point, makes it possible to modify at this point the crystalline structure of the material in which the ice is produced and thus to create an opaque or less transparent impact zone, which makes it visible. This modified zone, depending on its importance, can be visible either with the naked eye or by means of a magnifying glass. Depending on the energy and the focusing of the beam used, it is possible to vary the depth of the point impact in the thickness e of the glass 10. Therefore the point impact points 12 can be located at different levels.
Comme le montre la figure 3, la distance d entre deux impacts ponctuels 12 voisins est sensiblement égale à la somme de la section transversale a d'un impact et d'un intervalle i qui constitue une marge de sécurité évitant une superposition ou du moins une juxtaposition directe de deux impacts voisins. L'intervalle i est de préférence différent de zéro pour éviter que la réalisation d'impacts rapprochés n'entraîne une fragilisation de la glace.As shown in FIG. 3, the distance d between two adjacent point impacts 12 is substantially equal to the sum of the cross section a of an impact and an interval i which constitutes a safety margin avoiding overlapping or at least one direct juxtaposition of two neighboring impacts. The interval i is preferably different from zero to avoid that the achievement of close impacts does not cause embrittlement of the ice.
La formation du motif 11 , tel que par exemple le logo représenté par la figure 4, s'obtient par la création d'une succession d'impacts ponctuels 12 ordonnés de façon appropriée. Comme mentionné précédemment, les impacts ponctuels peuvent se situer sur différents niveaux. Ils pourraient également être directement juxtaposés de sorte qu'une succession d'impacts apparaisse comme une ligne continue.The formation of the pattern 11, such as for example the logo represented by FIG. 4, is obtained by the creation of a succession of punctual impacts 12 ordered in an appropriate manner. As mentioned earlier, ad hoc impacts can occur on different levels. They could also be directly juxtaposed so that a succession of impacts appears as a solid line.
Il est bien entendu que le motif représenté peut avoir une fonction purement esthétique ou définir un marquage à des fins commerciales. Ce motif visible ou invisible à l'oeil nu peut également constituer un code d'identification personnalisé destiné à caractériser l'objet en cas de vol. Ce code d'identification par marquage peut également n'être constitué que d'un seul impact positionné à un endroit prédéterminé dans la glace.It is understood that the motif represented can have a purely aesthetic function or define a marking for commercial purposes. This pattern visible or invisible to the naked eye can also constitute a personalized identification code intended to characterize the object in the event of theft. This identification code by marking may also consist of only one impact positioned at a predetermined location in the ice.
Le fait de pouvoir équiper une montre avec une telle glace marquée de façon indélébile, puisque le marquage est incrusté dans la matière et n'est donc pas accessible, et sans affecter l'état de surface de cette glace présente de multiples avantages tant au niveau de l'esthétique que de la contrefaçon. The fact of being able to equip a watch with such an indelibly marked crystal, since the marking is embedded in the material and is therefore not accessible, and without affecting the surface condition of this ice has many advantages both in terms of aesthetics and counterfeiting.

Claims

REVENDICATIONS
1. Glace de montre pourvue d'un marquage indélébile, caractérisée en ce qu'elle comporte dans son épaisseur au moins un impact ponctuel (12) effectué au laser sans que l'état de surface de ses faces intérieure (13) et extérieure (14) soit modifié.1. Watch glass provided with an indelible marking, characterized in that it includes in its thickness at least a point impact (12) made by laser without the surface condition of its inner (13) and outer ( 14) is changed.
2. Glace de montre selon la revendication 1 , caractérisée en ce qu'elle comporte dans son épaisseur (e) une série d'impacts ponctuels (12), et en ce que lesdits impacts sont agencés pour former un motif (11).2. Watch glass according to claim 1, characterized in that in its thickness (e) a series of punctual impacts (12), and in that said impacts are arranged to form a pattern (11).
3. Glace de montre selon la revendication 1 , caractérisée en ce que chaque impact (12) est formé par une modification de la structure cristalline de la matière dans laquelle est réalisée ladite glace (10), ladite modification de structure provoquant un changement d'aspect de ladite matière.3. Watch crystal according to claim 1, characterized in that each impact (12) is formed by a modification of the crystal structure of the material in which said crystal (10) is made, said modification of structure causing a change in appearance of said material.
4. Glace de montre selon la revendication 2, caractérisée en ce que lesdits impacts ponctuels (12) sont juxtaposés pour former ledit motif (11).4. Watch crystal according to claim 2, characterized in that said point impacts (12) are juxtaposed to form said pattern (11).
5. Glace de montre selon la revendication 4, caractérisée en ce que ledit motif est décoratif.5. Watch glass according to claim 4, characterized in that said pattern is decorative.
6. Glace de montre selon la revendication 4, caractérisée en ce que ledit motif est un code d'identification personnalisé.6. Watch glass according to claim 4, characterized in that said pattern is a personalized identification code.
7. Glace de montre selon la revendication 4, caractérisée en ce que ledit motif est une marque commerciale.7. Watch glass according to claim 4, characterized in that said pattern is a trademark.
8. Glace de montre selon la revendication 4, caractérisé en ce que ledit motif est invisible à l'oeil nu. 8. Watch glass according to claim 4, characterized in that said pattern is invisible to the naked eye.
9. Montre équipée d'une glace pourvue d'un marquage indélébile, caractérisée en ce que la glace (10) comporte dans son épaisseur (e) au moins un impact ponctuel (12) effectué au laser sans que l'état de surface de ses faces intérieure (13) et extérieure (14) soit modifié.9. Watch equipped with a crystal provided with an indelible marking, characterized in that the crystal (10) has in its thickness (e) at least a point impact (12) made by laser without the surface condition of its inner (13) and outer (14) faces are modified.
10. Montre selon la revendication 9, caractérisée en ce que la glace comporte une série d'impacts ponctuels (12), et en ce que lesdits impacts sont agencés pour former un motif (11).10. Watch according to claim 9, characterized in that the crystal includes a series of point impacts (12), and in that said impacts are arranged to form a pattern (11).
11. Montre selon la revendication 9, caractérisée en ce que chaque impact (12) ménagé dans la glace (10) est formé par une modification de la structure cristalline de la matière dans laquelle est réalisée ladite glace, ladite modification de structure provoquant un changement d'aspect de ladite matière.11. Watch according to claim 9, characterized in that each impact (12) formed in the crystal (10) is formed by a modification of the crystal structure of the material in which said crystal is made, said modification of structure causing a change appearance of said material.
12. Montre selon la revendication 10, caractérisée en ce que lesdits impacts ponctuels (12) sont juxtaposés pour former ledit motif (11).12. Watch according to claim 10, characterized in that said point impacts (12) are juxtaposed to form said pattern (11).
13. Montre selon la revendication 12, caractérisée en ce que ledit motif est décoratif.13. Watch according to claim 12, characterized in that said pattern is decorative.
14. Montre selon la revendication 12, caractérisée en ce que ledit motif est un code d'identification personnalisé.14. Watch according to claim 12, characterized in that said pattern is a personalized identification code.
15. Montre selon la revendication 12, caractérisée en ce que ledit motif est une marque commerciale.15. Watch according to claim 12, characterized in that said pattern is a trademark.
16. Montre selon la revendication 12, caractérisée en ce que ledit motif est invisible à l'oeil nu. 16. Watch according to claim 12, characterized in that said pattern is invisible to the naked eye.
PCT/CH1998/000440 1997-10-16 1998-10-15 Watch crystal provided with a mark and watch comprising same WO1999021061A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH240897A CH692256A5 (en) 1997-10-16 1997-10-16 Method of indelible marking of a watch glass, ice comprising a marking according to this method and watch provided with such a mirror.
CH2408/97 1997-10-16

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WO1999021061A1 true WO1999021061A1 (en) 1999-04-29

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WO2005047989A2 (en) * 2003-11-12 2005-05-26 Cosetta Schiavolini Horology crystal with three-dimensional decoration
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US9285777B2 (en) 2012-07-13 2016-03-15 Sicpa Holding Sa Method and system for authenticating a timepiece
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EP3712717A1 (en) 2019-03-19 2020-09-23 Comadur S.A. Method for marking a sapphire watchglass
EP3736644A1 (en) * 2019-05-08 2020-11-11 Omega SA Watertight watch case
EP3736643A1 (en) * 2019-05-08 2020-11-11 Omega SA Watertight watch case

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