EP1266723B1 - Dispositif de serrage d'un verre ophtalmique - Google Patents

Dispositif de serrage d'un verre ophtalmique Download PDF

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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
Authority
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
Application number
EP02291448A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1266723A1 (fr
Inventor
Laurent Guillermin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EssilorLuxottica SA
Original Assignee
Essilor International Compagnie Generale dOptique SA
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 Essilor International Compagnie Generale dOptique SA filed Critical Essilor International Compagnie Generale dOptique SA
Publication of EP1266723A1 publication Critical patent/EP1266723A1/fr
Application granted granted Critical
Publication of EP1266723B1 publication Critical patent/EP1266723B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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.

Landscapes

  • 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)
  • Materials For Medical Uses (AREA)
  • Lens Barrels (AREA)
EP02291448A 2001-06-15 2002-06-11 Dispositif de serrage d'un verre ophtalmique Expired - Lifetime EP1266723B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0107875A FR2825941B1 (fr) 2001-06-15 2001-06-15 Dispositif de serrage d'un verre ophtalmique
FR0107875 2001-06-15

Publications (2)

Publication Number Publication Date
EP1266723A1 EP1266723A1 (fr) 2002-12-18
EP1266723B1 true EP1266723B1 (fr) 2006-11-15

Family

ID=8864371

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02291448A Expired - Lifetime EP1266723B1 (fr) 2001-06-15 2002-06-11 Dispositif de serrage d'un verre ophtalmique

Country Status (7)

Country Link
US (1) US20030013392A1 (es)
EP (1) EP1266723B1 (es)
JP (1) JP2003071689A (es)
AT (1) ATE345190T1 (es)
DE (1) DE60216007T2 (es)
ES (1) ES2276896T3 (es)
FR (1) FR2825941B1 (es)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7643132B2 (en) * 2002-03-04 2010-01-05 Larry Holmberg Range finder
US6556245B1 (en) 1999-03-08 2003-04-29 Larry Allan Holmberg Game hunting video camera
US7574824B2 (en) 2006-01-06 2009-08-18 Larry Holmberg Device mount for a firearm
US8240077B2 (en) 2002-03-04 2012-08-14 Larry Holmberg Range finder for weapons
US8156680B2 (en) 2002-03-04 2012-04-17 Larry Holmberg Device mounting system for a weapon
FR2876609B1 (fr) * 2004-10-20 2007-02-16 Essilor Int Methode et dispositif de blocage d'une lentille ophtalmique en vue de son detourage
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 (fr) * 2007-02-13 2009-04-17 Essilor Int Machine de detourage d'une lentille de lunettes,pourvue d'un porte-outils tournant sur lequel sont montes plusieurs outils de travail
US7780363B1 (en) 2008-01-17 2010-08-24 Larry Holmberg Device for mounting imaging equipment to a bow and method of recording a hunt
US8024884B2 (en) 2009-06-16 2011-09-27 Larry Holmberg Electronic device mount system for weapons
US8161674B2 (en) * 2009-06-16 2012-04-24 Larry Holmberg Electronic device mount system with strap
US8656624B2 (en) 2010-12-29 2014-02-25 Larry Holmberg Universal device mount
US8656625B2 (en) 2010-12-29 2014-02-25 Larry Holmberg Accessory mount
JP6411821B2 (ja) * 2014-09-09 2018-10-24 オリンパス株式会社 レンズ製造装置及びレンズ製造方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
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 (fr) * 1976-05-18 1978-04-28 Essilor Int Bloc de montage d'une lentille sur une machine a deborder et biseauter les lentilles ophtalmiques
EP0726831A1 (en) * 1992-07-17 1996-08-21 Minnesota Mining And Manufacturing Company Method of processing a lens and means for use in the method
DE19831305C2 (de) * 1998-07-13 2001-11-29 Wernicke & Co Gmbh Einrichtung an einer Brillenglasrandbearbeitungsmaschine zum dreh- und verschiebefesten Halten eines Rohglases

Also Published As

Publication number Publication date
DE60216007D1 (de) 2006-12-28
FR2825941B1 (fr) 2003-12-12
FR2825941A1 (fr) 2002-12-20
ES2276896T3 (es) 2007-07-01
DE60216007T2 (de) 2007-07-12
US20030013392A1 (en) 2003-01-16
ATE345190T1 (de) 2006-12-15
JP2003071689A (ja) 2003-03-12
EP1266723A1 (fr) 2002-12-18

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