EP1266723B1 - Blocking means for an ophthalmic optic - Google Patents
Blocking means for an ophthalmic optic Download PDFInfo
- Publication number
- EP1266723B1 EP1266723B1 EP02291448A EP02291448A EP1266723B1 EP 1266723 B1 EP1266723 B1 EP 1266723B1 EP 02291448 A EP02291448 A EP 02291448A EP 02291448 A EP02291448 A EP 02291448A EP 1266723 B1 EP1266723 B1 EP 1266723B1
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- EP
- European Patent Office
- Prior art keywords
- flange
- abutment
- ophthalmic lens
- application surface
- lens
- 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
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
- B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
- B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
- B24B9/08—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass
- B24B9/14—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of optical work, e.g. lenses, prisms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
- B24B13/005—Blocking means, chucks or the like; Alignment devices
Definitions
- the invention relates to a device for clamping an ophthalmic lens according to the preamble of claim 1, adapted to allow the manipulation of the latter during its trimming, for example made by grinding, in order to adapt its outline to that frame of the mount chosen.
- the invention relates more particularly to an improvement made to at least one drive stop equipping this device.
- the invention finds its preferred application for the trimming of an ophthalmic lens having a surface layer with very low surface energy facilitating the cleaning of said glass.
- the trimming of an ophthalmic lens by grinding requires the glass to be clamped and held between two coaxial shafts, the ends of which are provided with drive stops, each having a lining of flexible material, sufficiently thick to accommodate differences in geometry. between the different glasses.
- the machining references of the glass are given by an accessory intended to form one of the aforementioned drive abutments, that is to say, to be attached to the end of one of the shafts.
- This elastomeric material accessory is bonded to the front face of the ophthalmic lens in a location that depends in particular on the optical characteristics of the glass and data representative of the morphology of the wearer. The bonding is done by means of a double-sided adhesive.
- the invention relates to a device for clamping an ophthalmic lens for trimming the latter, according to claim 1.
- the device may comprise, or be used with, an accessory forming a drive abutment adaptable to the end of one of the shafts, according to the prior art.
- the other driving abutment cooperating with the rear face of the glass is of the type defined above, in accordance with the invention.
- the removable accessory forming a drive stop is in accordance with the invention.
- said application surface is provided with a double-sided adhesive coating.
- the invention also applies to a device for clamping an ophthalmic lens with automatic positioning and in this case, the two shafts are each provided with a drive stop according to the invention.
- each drive stop is deformed to fit the shape of the glass.
- the initial (unconstrained) shape of the flange is different from that of the glass surface to which it is to apply. Under the effect of the axial force, the flange flexes freely because it is not attached to any rigid element forming a stop. This elastic deflection (causing the deformation of the flange) contributes to the good distribution of the clamping force.
- WO 00/03838 discloses a device comprising a polyurethane drive element whose deflection is prevented by centering elements forming an abutment while the mounting block describes in FR 2 366 103 comprises a deformable web extended by annular rings and a centering cone, this web being deformed directly by the pressure of a support arm and not by free deflection, only the veil deformable being in contact with the lens, without it having a central pin in contact with the lens.
- the thickness of the flange is calculated to obtain a relatively constant pressure over the entire contact zone.
- the drive stop is intended to cooperate with the rear face of an ophthalmic lens, it is given a substantially flat application surface in the unconstrained state.
- a drive stop is intended to cooperate with the front face of the ophthalmic lens, it is given a concave surface in the unconstrained state.
- said application surface may be covered with a thin lining of plastic material or elastomeric material, the thickness of this lining will preferably be of the order of 1 to 2 mm.
- said thin coating may be a flexible P.V.C. or neoprene.
- said application surface is provided with an adhesive layer such as a double-sided adhesive coating.
- This adhesive layer can replace the thin plastic or elastomeric material gasket.
- the flange of the drive abutment will have a circular contour.
- the collar of such a drive abutment may have an oblong contour.
- the flange and the peg are preferably made in one piece and in the same material. Satisfactory results were used using polyoxymethylene. In this polyoxymethylene embodiment, the flange has a thickness of the order of 1.5 mm.
- the clamping device 11 partially shown comprises two axially aligned shafts 12, 14 which can be moved towards one another. Each shaft 12, 14 carries at its end a drive abutment 16a, 16b respectively. An ophthalmic lens 20 can be clamped between these two stops. Furthermore, it is known that the clamping device 11 is, in a conventional manner, capable of moving opposite a grinding wheel (not shown). On the other hand, after tightening, the two shafts 12, 14 are rotated so as to be able to turn the ophthalmic lens 20 relative to the grinding wheel. It is by controlling the rotation of the glass and the distance between the common axis of the two shafts and the axis of rotation of the grinding wheel that the desired contour can be given to the ophthalmic lens.
- the clamping device 11 is self-positioning, that is to say that the ophthalmic lens carried by a not shown support is positioned relative to the common axis of the two shafts for the center of the clamping zone coincides with a predetermined point of the ophthalmic lens depending in particular on characteristics specific to this lens and characteristics representative of the morphology of the wearer.
- the clamping point also corresponds to the center of the rectangle in which the frame of the frame, also called circle, is inscribed.
- each drive abutment 16a, 16b comprises a central pin 24a, 24b, relatively non-deformable, extended externally by a collar 26a, 26b elastically deformable.
- Each flange is of semi-rigid plastic material and therefore capable of flexing elastically and freely (not being maintained) when it is pressed against the glass.
- Such a collar is shaped to have an application surface 28a, 28b adapted to come into contact with the glass and to conform to the shape of the latter under the effect of a clamping force applied to the corresponding stop, at the time of bringing the two trees closer together.
- the configuration is that shown in Figure 2.
- the application surface belongs for its peripheral portion to said collar and for its most central part to the pin itself.
- the application surface of each driving abutment is covered with a thin lining 30 of plastic material or elastomeric material.
- the thickness of this lining is of the order of 1 to 2 mm. This is for example a flexible PV or a neoprene.
- the two driving abutments 16a, 16b do not have exactly the same shape.
- the stop 16a which is intended for cooperate with the front face of the ophthalmic lens has a concave application surface 28a in the unconstrained state.
- the abutment 16b which is intended to cooperate with the rear face of the ophthalmic lens has a substantially planar application surface 28b in the unconstrained state.
- the seal Thin plastic or elastomeric material may be replaced by a double-sided adhesive.
- such an adhesive will have a behavior comparable to that of the thin plastic lining or elastomeric material of the other driving abutment 16b during the trimming of the glass, that is to say that it will oppose effectively to any torsional deformation and thus prevent any loss of positioning reference.
- the central portion of the application surface 28a, 28b is recessed, the central pin having an axial bore.
- the flange and the pin are made in one piece in the same material.
- the thin seal to enhance the adhesion will be chosen a plastic material or an elastomer having the coefficient of adhesion with the highest possible glass.
- the two materials indicated above give satisfaction.
- the hardness of this material will be chosen lower, preferably at 90 Shores.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
- Prostheses (AREA)
- Eyeglasses (AREA)
- Lens Barrels (AREA)
- Materials For Medical Uses (AREA)
Abstract
Description
L'invention se rapporte à un dispositif de serrage d'un verre ophtalmique selon le préambule de la revendication 1, apte à permettre la manipulation de ce dernier pendant son détourage, par exemple réalisé par meulage, en vue d'adapter son contour à celui du cadre de la monture choisie. L'invention concerne plus particulièrement un perfectionnement apporté à au moins une butée d'entraînement équipant ce dispositif. L'invention trouve son application privilégiée pour le détourage d'un verre ophtalmique présentant une couche superficielle à énergie de surface très faible facilitant le nettoyage dudit verre.The invention relates to a device for clamping an ophthalmic lens according to the preamble of claim 1, adapted to allow the manipulation of the latter during its trimming, for example made by grinding, in order to adapt its outline to that frame of the mount chosen. The invention relates more particularly to an improvement made to at least one drive stop equipping this device. The invention finds its preferred application for the trimming of an ophthalmic lens having a surface layer with very low surface energy facilitating the cleaning of said glass.
Le détourage d'un verre ophtalmique par meulage nécessite de serrer et maintenir le verre entre deux arbres coaxiaux dont les extrémités sont munies de butées d'entraînement, présentant chacune une garniture en matériau souple, suffisamment épaisse pour s'adapter à des différences de géométrie entre les différents verres. Classiquement, les références d'usinage du verre sont données par un accessoire destiné à constituer l'une des butées d'entraînement précitées, c'est-à-dire à être rapporté à l'extrémité de l'un des arbres. Cet accessoire en matériau élastomère est collé sur la face avant du verre ophtalmique en un emplacement qui dépend notamment des caractéristiques optiques du verre et de données représentatives de la morphologie du porteur. Le collage se fait au moyen d'un adhésif double face. Une fois le verre positionné, par cet accessoire formant butée d'entraînement, à une extrémité de l'un des arbres, il est serré par la butée d'entraînement montée à l'extrémité de l'autre arbre. Cette dernière est généralement montée sur rotule. Cette solution présente plusieurs inconvénients. D'une part, le coefficient d'adhérence entre le matériau élastomère et le verre est relativement faible et ce problème a tendance à s'aggraver du fait de la généralisation des revêtements de surface facilitant le nettoyage et présentant de ce fait une énergie de surface très faible. D'autre part, l'épaisseur de l'élastomère étant relativement importante, les butées d'entraînement ont tendance à se déformer en torsion lorsqu'on soumet le verre aux efforts d'usinage. Il peut en résulter une perte de référence du verre à meuler, ce qui se traduit principalement par des défauts d'axage et parfois de centrage. L'invention permet de surmonter ces inconvénients.The trimming of an ophthalmic lens by grinding requires the glass to be clamped and held between two coaxial shafts, the ends of which are provided with drive stops, each having a lining of flexible material, sufficiently thick to accommodate differences in geometry. between the different glasses. Conventionally, the machining references of the glass are given by an accessory intended to form one of the aforementioned drive abutments, that is to say, to be attached to the end of one of the shafts. This elastomeric material accessory is bonded to the front face of the ophthalmic lens in a location that depends in particular on the optical characteristics of the glass and data representative of the morphology of the wearer. The bonding is done by means of a double-sided adhesive. Once the glass is positioned, by this accessory forming a drive stop, at one end of one of the shafts, it is clamped by the drive stop mounted at the end of the other shaft. The latter is usually mounted on a ball joint. This solution has several disadvantages. On the one hand, the coefficient of adhesion between the elastomeric material and the glass is relatively low and this problem tends to worsen due to the generalization of surface coatings facilitating cleaning and thereby having a surface energy very weak. On the other hand, since the thickness of the elastomer is relatively large, the driving abutments tend to deform in torsion when the glass is subjected to the machining forces. This can result in a reference loss of the glass to be grinded, which mainly results in defects in the axis and sometimes centering. The invention overcomes these disadvantages.
Plus précisément, l'invention concerne un dispositif de serrage d'un verre ophtalmique pour le détourage de ce dernier, selon la revendication 1.More specifically, the invention relates to a device for clamping an ophthalmic lens for trimming the latter, according to claim 1.
Le dispositif peut comporter, ou être utilisé avec, un accessoire formant butée d'entraînement adaptable à l'extrémité de l'un des arbres, conforme à la technique antérieure. Dans ce cas, l'autre butée d'entraînement coopérant avec la face arrière du verre est du type défini ci-dessus, conforme à l'invention. Il est aussi envisageable que l'accessoire amovible formant butée d'entraînement soit conforme à l'invention. Dans ce cas, ladite surface d'application est munie d'un revêtement autocollant double face.The device may comprise, or be used with, an accessory forming a drive abutment adaptable to the end of one of the shafts, according to the prior art. In this case, the other driving abutment cooperating with the rear face of the glass is of the type defined above, in accordance with the invention. It is also conceivable that the removable accessory forming a drive stop is in accordance with the invention. In this case, said application surface is provided with a double-sided adhesive coating.
L'invention s'applique aussi à un dispositif de serrage d'un verre ophtalmique à positionnement automatique et dans ce cas, les deux arbres sont munis chacun d'une butée d'entraînement conforme à l'invention. Lorsque les deux arbres sont sollicités l'un vers l'autre, axialement, chaque butée d'entraînement se déforme pour venir épouser la forme du verre.The invention also applies to a device for clamping an ophthalmic lens with automatic positioning and in this case, the two shafts are each provided with a drive stop according to the invention. When the two shafts are biased towards each other, axially, each drive stop is deformed to fit the shape of the glass.
La forme initiale (à l'état non contraint) de la collerette est différente de celle de la surface du verre sur laquelle elle doit s'appliquer. Sous l'effet de l'effort axial, la collerette fléchit librement du fait qu'elle n'est adossée à aucun élément rigide formant butée. Ce fléchissement élastique (provoquant la déformation de la collerette) contribue à la bonne répartition de l'effort de serrage.The initial (unconstrained) shape of the flange is different from that of the glass surface to which it is to apply. Under the effect of the axial force, the flange flexes freely because it is not attached to any rigid element forming a stop. This elastic deflection (causing the deformation of the flange) contributes to the good distribution of the clamping force.
On notera, à propos de l'état de la technique, que le document WO 00/03838 décrit un dispositif comportant un élément d'entraînement en polyuréthane dont le fléchissement est empêché par des éléments de centrage formant butée tandis que le bloc de montage décrit dans le document FR 2 366 103 comporte un voile déformable prolongé par des couronnes annulaires et un cône de centrage, ce voile étant déformé directement par la pression d'un bras support et non par fléchissement libre, seul le voile déformable étant en contact avec la lentille, sans qu'il ait de pion central en contact avec la lentille.It will be noted, in connection with the state of the art, that WO 00/03838 discloses a device comprising a polyurethane drive element whose deflection is prevented by centering elements forming an abutment while the mounting block describes in FR 2 366 103 comprises a deformable web extended by annular rings and a centering cone, this web being deformed directly by the pressure of a support arm and not by free deflection, only the veil deformable being in contact with the lens, without it having a central pin in contact with the lens.
Comme on le verra plus loin, l'épaisseur de la collerette est calculée pour obtenir une pression relativement constante sur toute la zone de contact. Avantageusement, lorsque la butée d'entraînement est destinée à coopérer avec la face arrière d'un verre ophtalmique, on lui donne une surface d'application sensiblement plane à l'état non contraint. Avantageusement encore, lorsqu'une telle butée d'entraînement est destinée à coopérer avec la face avant du verre ophtalmique, on lui donne une surface concave à l'état non contraint.As will be seen below, the thickness of the flange is calculated to obtain a relatively constant pressure over the entire contact zone. Advantageously, when the drive stop is intended to cooperate with the rear face of an ophthalmic lens, it is given a substantially flat application surface in the unconstrained state. Advantageously, when such a drive stop is intended to cooperate with the front face of the ophthalmic lens, it is given a concave surface in the unconstrained state.
Selon une autre caractéristique avantageuse, ladite surface d'application peut être recouverte d'une garniture mince en matière plastique ou en matériau élastomère, l'épaisseur de cette garniture sera de préférence de l'ordre de 1 à 2 mm. En outre, le matériau utilisé permet en toute circonstance de conserver les références d'usinage. A titre d'exemple, ledit revêtement mince peut être un P.V.C. souple ou du néoprène.According to another advantageous characteristic, said application surface may be covered with a thin lining of plastic material or elastomeric material, the thickness of this lining will preferably be of the order of 1 to 2 mm. In addition, the material used allows in any circumstance to maintain the machining references. By way of example, said thin coating may be a flexible P.V.C. or neoprene.
Dans le cas où la butée d'entraînement constitue un accessoire de positionnement que l'on vient placer sur la face avant du verre, ladite surface d'application est pourvue d'une couche adhésive telle qu'un revêtement autocollant double face. Cette couche adhésive peut remplacer la garniture mince en matière plastique ou matériau élastomère.In the case where the driving abutment constitutes a positioning accessory that is placed on the front face of the glass, said application surface is provided with an adhesive layer such as a double-sided adhesive coating. This adhesive layer can replace the thin plastic or elastomeric material gasket.
Généralement, la collerette de la butée d'entraînement aura un contour circulaire. Cependant, pour le meulage d'un verre étroit (type demi-lune, par exemple) la collerette d'une telle butée d'entraînement pourra avoir un contour oblong. La collerette et le pion sont de préférence réalisés d'un seul tenant et dans un même matériau. Des résultats satisfaisants ont été utilisés en utilisant du polyoxyméthylène. Dans ce mode de réalisation en polyoxyméthylène, la collerette a une épaisseur de l'ordre de 1,5 mm.Generally, the flange of the drive abutment will have a circular contour. However, for the grinding of a narrow glass (half-moon type, for example) the collar of such a drive abutment may have an oblong contour. The flange and the peg are preferably made in one piece and in the same material. Satisfactory results were used using polyoxymethylene. In this polyoxymethylene embodiment, the flange has a thickness of the order of 1.5 mm.
L'invention sera mieux comprise et d'autres avantages de celle-ci apparaîtront plus clairement à la lumière de la description qui va suivre, donnée uniquement à titre d'exemple et faite en référence aux dessins annexés dans lesquels :
- la figure 1 est une vue schématique partielle d'un dispositif de serrage d'un verre ophtalmique conforme à l'invention, montrant les formes des butées d'entraînement avant serrage de part et d'autre du verre ; et
- la figure 2 est une vue analogue à la figure 1 montrant les formes des butées d'entraînement après serrage.
- Figure 1 is a partial schematic view of a clamping device of an ophthalmic lens according to the invention, showing the shapes of the drive stops before clamping on either side of the glass; and
- Figure 2 is a view similar to Figure 1 showing the forms of the drive abutments after tightening.
Le dispositif de serrage 11 partiellement représenté comporte deux arbres 12, 14 alignés axialement et susceptibles d'être rapprochés en direction l'un de l'autre. Chaque arbre 12, 14 porte à son extrémité une butée d'entraînement 16a, 16b respectivement. Un verre ophtalmique 20 est susceptible d'être serré entre ces deux butées. Par ailleurs, on sait que le dispositif de serrage 11 est, de façon classique, susceptible de se déplacer en regard d'une meule (non représentée). D'autre part, après serrage, les deux arbres 12, 14 sont entraînés en rotation de façon à pouvoir faire tourner le verre ophtalmique 20 par rapport à la meule. C'est en contrôlant la rotation du verre ainsi que l'éloignement entre l'axe commun des deux arbres et l'axe de rotation de la meule que l'on peut donner au verre ophtalmique le contour voulu. Dans l'exemple représenté, le dispositif de serrage 11 est à positionnement automatique, c'est-à-dire que le verre ophtalmique porté par un support non représenté est positionné par rapport à l'axe commun des deux arbres pour que le centre de la zone de serrage coïncide avec un point prédéterminé du verre ophtalmique dépendant notamment de caractéristiques propres à ce verre et de caractéristiques représentatives de la morphologie du porteur. Classiquement, le point de serrage correspond également au centre du rectangle dans lequel s'inscrit le cadre de la monture, encore appelé cercle.The
Comme représenté, chaque butée d'entraînement 16a, 16b comprend un pion central 24a, 24b, relativement non déformable, prolongé extérieurement par une collerette 26a, 26b élastiquement déformable. Chaque collerette est en matière plastique semi-rigide et par conséquent susceptible de fléchir élastiquement et librement (n'étant pas maintenue) lorsqu'elle est appliquée à force contre le verre. Une telle collerette est conformée pour présenter une surface d'application 28a, 28b apte à entrer en contact avec le verre et à épouser la forme de ce dernier sous l'effet d'un effort de serrage appliqué à la butée correspondante, au moment du rapprochement des deux arbres. Après serrage, la configuration est celle qui est représentée sur la figure 2. Dans l'exemple, la surface d'application appartient pour sa partie périphérique à ladite collerette et pour sa partie la plus centrale au pion lui-même. Cependant, il n'y a pas de solution de continuité entre la partie de la surface d'application 28a, 28b qui appartient à la collerette 26a, 26b et celle qui appartient au pion 24a, 24b. De plus, dans l'exemple, la surface d'application de chaque butée d'entraînement est recouverte d'une garniture mince 30 en matière plastique ou matériau élastomère. L'épaisseur de cette garniture est de l'ordre de 1 à 2 mm. Il s'agit par exemple d'un P.V.C. souple ou d'un néoprène.As shown, each
Comme on peut le voir sur la figure 1, les deux butées d'entraînement 16a, 16b n'ont pas exactement la même forme. La butée 16a qui est destinée à coopérer avec la face avant du verre ophtalmique a une surface d'application 28a concave à l'état non contraint. La butée 16b qui est destinée à coopérer avec la face arrière du verre ophtalmique a une surface d'application 28b sensiblement plane à l'état non contraint. Dans le cas d'un dispositif à positionnement manuel où la butée d'entraînement solidaire de l'arbre 12 est en fait un accessoire amovible susceptible d'être collé, avant montage et serrage, sur la surface avant du verre ophtalmique 20, la garniture mince 30 en matière plastique ou matériau élastomère peut être remplacée par un adhésif double face. En effet, un tel adhésif aura un comportement comparable à celui de la garniture mince en matière plastique ou matériau élastomère de l'autre butée d'entraînement 16b pendant le détourage du verre, c'est-à-dire qu'il s'opposera efficacement à toute déformation en torsion et empêchera par conséquent toute perte de la référence de positionnement.As can be seen in Figure 1, the two driving
Pour chaque butée d'entraînement 16a, 16b, la partie centrale de la surface d'application 28a, 28b est évidée, le pion central présentant un perçage axial. En outre, la collerette et le pion sont réalisés d'un seul tenant dans un même matériau. A ce jour, des résultats satisfaisants ont été obtenus en réalisant la butée dans du polyoxyméthylène présentant un module d'élasticité E = 2900 N/mm2. De bons résultats sont obtenus en choisissant une épaisseur h de la collerette égale à :
De façon plus générale, en fonction de la force de serrage F de la flèche w désirée (en mm) de l'extérieur de la collerette quand une force F est exercée et du module d'élasticité E (en N/mm2) du matériau choisi, l'épaisseur approximative de la collerette est donnée par :
les paramètres α β γ et ε sont donnés par les relations suivantes
the parameters α β γ and ε are given by the following relations
Pour ce qui concerne la garniture mince permettant de renforcer l'adhérence on choisira une matière plastique ou un élastomère ayant le coefficient d'adhérence avec le verre le plus élevé possible. Les deux matériaux indiqués ci-dessus donnent satisfaction. La dureté de ce matériau sera choisie inférieure, de préférence, à 90 Shores.Regarding the thin seal to enhance the adhesion will be chosen a plastic material or an elastomer having the coefficient of adhesion with the highest possible glass. The two materials indicated above give satisfaction. The hardness of this material will be chosen lower, preferably at 90 Shores.
Claims (13)
- A device for clamping an ophthalmic lens for edging it, including at least one driving abutment (16a, 16b) including a relatively non-deformable central peg (24a, 24b) extended externally by a semi-rigid elastically deformable material flange (26a, 26b) in which at least said flange is conformed to have an application surface (28a, 28b) adapted to come into contact with said lens and to be deformed to espouse the shape thereof, characterised in that said surface deforms by flexing freely under the effect of a clamping force applied to said abutment because the flange does not lean against any rigid element which forms an abutment.
- A device according to claim 1, characterised in that a peripheral part of said application surface (28a, 28b) is part of said flange and its more central part is part of said peg.
- A device according to claim 1 or claim 2, characterised in that said application surface is covered with a thin plastics material or elastomer material facing (30).
- A device according to claim 3, characterised in that the thickness of said thin facing (30) is of the order of 1 to 2 mm.
- A device according to claim 3 or claim 4, characterised in that said thin facing (30) is made of flexible PVC.
- A device according to claim 3 or claim 4, characterised in that said thin facing (30) is made of neoprene.
- A device according to any preceding claim, characterised in that said application surface includes an adhesive layer.
- A device according to any preceding claim, characterised in that a driving abutment (16b) adapted to cooperate with the rear face of an ophthalmic lens has a substantially plane surface in the unstressed state.
- A device according to any preceding claim, characterised in that a driving abutment (16a) adapted to cooperate with the front face of an ophthalmic lens has a concave surface in the unstressed state.
- A device according to any preceding claim, characterised in that the driving abutment flange has an oblong contour.
- A device according to any preceding claim, characterised in that said flange (26a, 26b) and said peg (24a, 24b) are made in one piece from the same material.
- A device according to claim 11, characterised in that said material is polyoxymethylene.
- A device according to claim 12, characterised in that the thickness of said flange is of the order of 1.5 mm.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0107875 | 2001-06-15 | ||
FR0107875A FR2825941B1 (en) | 2001-06-15 | 2001-06-15 | DEVICE FOR TIGHTENING AN OPHTHALMIC GLASS |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1266723A1 EP1266723A1 (en) | 2002-12-18 |
EP1266723B1 true EP1266723B1 (en) | 2006-11-15 |
Family
ID=8864371
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02291448A Expired - Lifetime EP1266723B1 (en) | 2001-06-15 | 2002-06-11 | Blocking means for an ophthalmic optic |
Country Status (7)
Country | Link |
---|---|
US (1) | US20030013392A1 (en) |
EP (1) | EP1266723B1 (en) |
JP (1) | JP2003071689A (en) |
AT (1) | ATE345190T1 (en) |
DE (1) | DE60216007T2 (en) |
ES (1) | ES2276896T3 (en) |
FR (1) | FR2825941B1 (en) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6556245B1 (en) | 1999-03-08 | 2003-04-29 | Larry Allan Holmberg | Game hunting video camera |
US8240077B2 (en) | 2002-03-04 | 2012-08-14 | Larry Holmberg | Range finder for weapons |
US7643132B2 (en) * | 2002-03-04 | 2010-01-05 | Larry Holmberg | Range finder |
US7574824B2 (en) | 2006-01-06 | 2009-08-18 | Larry Holmberg | Device mount for a firearm |
US8156680B2 (en) | 2002-03-04 | 2012-04-17 | Larry Holmberg | Device mounting system for a weapon |
FR2876609B1 (en) * | 2004-10-20 | 2007-02-16 | Essilor Int | METHOD AND DEVICE FOR LOCKING AN OPHTHALMIC LENS FOR ITS DISTURBANCE |
US7594352B2 (en) | 2006-10-17 | 2009-09-29 | Larry Holmberg | Device mount with stabilizing function |
US7891131B2 (en) | 2007-01-05 | 2011-02-22 | Larry Holmberg | Device mount system for a weapon |
US7739822B1 (en) | 2007-01-09 | 2010-06-22 | Larry Holmberg | Method and device for mounting an accessory to a firearm |
FR2912335B1 (en) * | 2007-02-13 | 2009-04-17 | Essilor Int | MACHINE FOR DETOURING A LENS OF GLASSES, PROVIDED WITH A ROTATING TOOL HOLDER ON WHICH ARE MADE SEVERAL WORKING TOOLS |
US7780363B1 (en) | 2008-01-17 | 2010-08-24 | Larry Holmberg | Device for mounting imaging equipment to a bow and method of recording a hunt |
US8161674B2 (en) * | 2009-06-16 | 2012-04-24 | Larry Holmberg | Electronic device mount system with strap |
US8024884B2 (en) | 2009-06-16 | 2011-09-27 | Larry Holmberg | Electronic device mount system for weapons |
US8656625B2 (en) | 2010-12-29 | 2014-02-25 | Larry Holmberg | Accessory mount |
US8656624B2 (en) | 2010-12-29 | 2014-02-25 | Larry Holmberg | Universal device mount |
JP6411821B2 (en) * | 2014-09-09 | 2018-10-24 | オリンパス株式会社 | Lens manufacturing apparatus and lens manufacturing method |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2055397A (en) * | 1936-06-19 | 1936-09-22 | Zaiger Max | Suction cup |
US3100955A (en) * | 1960-04-25 | 1963-08-20 | Plastic Contact Lens Company | Apparatus for producing contact lenses |
FR2366103A1 (en) * | 1976-05-18 | 1978-04-28 | Essilor Int | BLOCK FOR MOUNTING A LENS ON A MACHINE TO EDGE AND BEVEL OPHTHALMIC LENSES |
JPH07509411A (en) * | 1992-07-17 | 1995-10-19 | ミネソタ マイニング アンド マニュファクチャリング カンパニー | Lens processing methods and means used |
DE19831305C2 (en) * | 1998-07-13 | 2001-11-29 | Wernicke & Co Gmbh | Device on a spectacle lens edge processing machine for holding a raw lens rotatably and displaceably |
-
2001
- 2001-06-15 FR FR0107875A patent/FR2825941B1/en not_active Expired - Fee Related
-
2002
- 2002-06-11 DE DE60216007T patent/DE60216007T2/en not_active Expired - Lifetime
- 2002-06-11 EP EP02291448A patent/EP1266723B1/en not_active Expired - Lifetime
- 2002-06-11 AT AT02291448T patent/ATE345190T1/en not_active IP Right Cessation
- 2002-06-11 ES ES02291448T patent/ES2276896T3/en not_active Expired - Lifetime
- 2002-06-14 US US10/170,641 patent/US20030013392A1/en not_active Abandoned
- 2002-06-17 JP JP2002175544A patent/JP2003071689A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
US20030013392A1 (en) | 2003-01-16 |
DE60216007T2 (en) | 2007-07-12 |
FR2825941B1 (en) | 2003-12-12 |
ATE345190T1 (en) | 2006-12-15 |
FR2825941A1 (en) | 2002-12-20 |
DE60216007D1 (en) | 2006-12-28 |
EP1266723A1 (en) | 2002-12-18 |
JP2003071689A (en) | 2003-03-12 |
ES2276896T3 (en) | 2007-07-01 |
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