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US20030013392A1 - Device for clamping an ophthalmic lens - Google Patents

Device for clamping an ophthalmic lens Download PDF

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Publication number
US20030013392A1
US20030013392A1 US10/170,641 US17064102A US2003013392A1 US 20030013392 A1 US20030013392 A1 US 20030013392A1 US 17064102 A US17064102 A US 17064102A US 2003013392 A1 US2003013392 A1 US 2003013392A1
Authority
US
United States
Prior art keywords
flange
lens
ophthalmic lens
clamping
abutment
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.)
Abandoned
Application number
US10/170,641
Other languages
English (en)
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
Individual
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 Individual filed Critical Individual
Assigned to ESSILOR INTERNATIONAL (COMPAGNIE GENERALE D'OPTIQUE) reassignment ESSILOR INTERNATIONAL (COMPAGNIE GENERALE D'OPTIQUE) ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GUILLERMIN, LAURENT
Publication of US20030013392A1 publication Critical patent/US20030013392A1/en
Abandoned 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, for manipulating the lens while edging it, for example by grinding it, to match its contour to that of the rim of the chosen frame.
  • the invention relates more particularly to an improvement made to a driving abutment of the device.
  • a preferential application of the invention is to edging an ophthalmic lens having a surface layer of very low surface energy to facilitate cleaning the lens.
  • the invention provides a device for clamping an ophthalmic lens for edging it, which device includes a driving abutment including a relatively deformable central peg extended externally by a semi-rigid elastically deformable and flexible material flange and at least said flange is conformed to have an application surface adapted to come into contact with said lens and to be deformed to espouse the shape thereof by flexing freely due to the effect of a clamping force applied to said abutment.
  • a driving abutment including a relatively deformable central peg extended externally by a semi-rigid elastically deformable and flexible material flange and at least said flange is conformed to have an application surface adapted to come into contact with said lens and to be deformed to espouse the shape thereof by flexing freely due to the effect of a clamping force applied to said abutment.
  • the device can include, or be used with, an accessory forming a driving abutment adapted to be fitted to the end of one of the shafts, as in the prior art.
  • the other driving abutment, cooperating with the rear face of the lens is of the type conforming to the invention defined hereinabove.
  • the removable accessory forming a driving abutment is also feasible for the removable accessory forming a driving abutment to conform to the invention.
  • the application surface is provided with a double-sided self-adhesive coating.
  • the invention also applies to an ophthalmic lens clamping device with automatic positioning, and in this case the two shafts are each provided with a driving abutment conforming to the invention. When the two shafts are urged toward each other axially, each driving abutment is deformed to espouse the shape of the lens.
  • the initial shape of the flange i.e. its shape in the unstressed state
  • the flange flexes freely because there is no rigid member forming an abutment behind it.
  • This elastic flexing (causing the deformation of the flange) contributes to proper distribution of the clamping force.
  • the thickness of the flange is calculated to obtain a relatively constant pressure over the whole of the contact area. If the driving abutment is intended to cooperate with the rear face of an ophthalmic lens, it is advantageous for it to have a substantially plane application surface in the unstressed state. If the driving abutment is intended to cooperate with the front face of an ophthalmic lens, it is advantageous for it to have a concave surface in the unstressed state.
  • the application surface can be covered with a thin plastics material or elastomer material facing, and the thickness of the facing is preferably of the order of 1 to 2 mm. Also, this material preserves the machining references in all circumstances.
  • the thin coating can consist of flexible PVC or neoprene.
  • the application surface is provided with an adhesive layer such as a double-sided self-adhesive coating.
  • This adhesive material can replace the thin plastics material or elastomer material facing.
  • the flange of the driving abutment will generally have a circular contour. However, for grinding a narrow lens (a half-moon lens, for example), the flange of this kind of driving abutment can have an oblong contour.
  • the flange and the peg are preferably made in one piece and from the same material. Satisfactory results have been obtained using polyoxymethylene. In one embodiment using polyoxymethylene, the flange had a thickness of the order of 1.5 mm.
  • FIG. 1 is a diagrammatic view of part of a device in accordance with the invention for clamping an ophthalmic lens, showing the shapes of driving abutments on respective opposite sides of the lens before clamping.
  • FIG. 2 is a view analogous to FIG. 1 showing the shapes of the driving abutments after clamping.
  • the clamping device 11 shown in part includes two axially aligned shafts 12 , 14 adapted to be moved toward each other. Each shaft 12 , 14 carries at its end a respective driving abutment 16 a , 16 b . An ophthalmic lens 20 can be clamped between the two abutments. In the conventional way, the clamping device 11 is adapted to move in front of a grinding wheel (not shown). This is known in the art. Also, after clamping, the two shafts 12 , 14 are driven in rotation to turn the ophthalmic lens 20 relative to the grinding wheel.
  • the clamping device 11 is of the automatic positioning type, i.e. the ophthalmic lens is carried by a support, not shown, and is positioned relative to the common axis of the two shafts so that the center of the clamping area coincides with a predetermined point on the ophthalmic lens that depends in particular on specific characteristics of the lens and characteristics representative of the morphology of the wearer.
  • the clamping point also corresponds to the center of the rectangle in which is inscribed the rim of the frame, also called the surround.
  • each driving abutment 16 a , 16 b includes a relatively undeformable central peg 24 a , 24 b extended externally by an elastically deformable flange 26 a , 26 b .
  • Each flange is made of a semi-rigid plastics material and consequently is able to flex elastically and freely (being unrestrained) when it is pressed onto the lens.
  • the flange is conformed with an application surface 28 a , 28 b adapted to come into contact with the lens and to espouse its shape due to the effect of a clamping force applied to the corresponding abutment when the two shafts are moved toward each other.
  • the configuration after clamping is that shown in FIG. 2.
  • the peripheral part of the application surface is part of the flange and its more central part is part of the peg itself.
  • the application surface of each driving abutment is covered with a thin plastics material or elastomer material facing 30 .
  • the thickness of the facing is of the order of 1 to 2 mm. It consists of flexible PVC or neoprene, for example.
  • the two driving abutments 16 a , 16 b are not exactly the same shape.
  • the abutment 16 a that is intended to cooperate with the front face of the ophthalmic lens has a concave application surface 28 a in the unstressed state.
  • the abutment 16 b that is intended to cooperate with the rear face of the ophthalmic lens has a substantially plane application surface 28 b in the unstressed state.
  • the thin plastics material or elastomer material facing 30 can be replaced by a double-sided adhesive, because the adhesive will have a behavior comparable to that of the thin plastics material or elastomer material facing of the other driving abutment 16 b during edging of the lens, in other words it will effectively oppose any deformation in torsion and will consequently prevent any loss of the positioning reference.
  • a is the outside radius of the flange
  • b is the inside radius of the flange (in mm)
  • v is Poisson's coefficient for the material (usually 0.3).
  • a plastics material or an elastomer having the highest possible adhesion to the lens is used for the thin facing for improving adhesion.
  • the two materials indicated hereinabove are satisfactory.
  • the Shore hardness of the material is preferably less than 90.

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)
  • Lens Barrels (AREA)
  • Eyeglasses (AREA)
  • Materials For Medical Uses (AREA)
US10/170,641 2001-06-15 2002-06-14 Device for clamping an ophthalmic lens Abandoned US20030013392A1 (en)

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 (1)

Publication Number Publication Date
US20030013392A1 true US20030013392A1 (en) 2003-01-16

Family

ID=8864371

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/170,641 Abandoned US20030013392A1 (en) 2001-06-15 2002-06-14 Device for clamping an ophthalmic lens

Country Status (7)

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

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2876609A1 (fr) * 2004-10-20 2006-04-21 Essilor Int Methode et dispositif de blocage d'une lentille ophtalmique en vue de son detourage
US7643132B2 (en) 2002-03-04 2010-01-05 Larry Holmberg Range finder
US20100009603A1 (en) * 2007-02-13 2010-01-14 Essilor International (Compagnie Generale D'optique) Machine for shaping an eyeglass lens, the machine being provided with a turnable tool-carrier having a plurality of working tools mounted thereon
US20100128166A1 (en) * 1999-03-08 2010-05-27 Larry Holmberg Camera for mounting
US7739822B1 (en) 2007-01-09 2010-06-22 Larry Holmberg Method and device for mounting an accessory to a firearm
US7780363B1 (en) 2008-01-17 2010-08-24 Larry Holmberg Device for mounting imaging equipment to a bow and method of recording a hunt
US20100313461A1 (en) * 2009-06-16 2010-12-16 Larry Holmberg Electronic device mount system with strap
US7891131B2 (en) 2007-01-05 2011-02-22 Larry Holmberg Device mount system for a weapon
US7926220B2 (en) 2006-10-17 2011-04-19 Larry Holmberg Stabilizing device mount and method
US8024884B2 (en) 2009-06-16 2011-09-27 Larry Holmberg Electronic device mount system for weapons
US8046950B2 (en) 2006-01-06 2011-11-01 Larry Holmberg Method of attaching device to weapon
US8156680B2 (en) 2002-03-04 2012-04-17 Larry Holmberg Device mounting system for a weapon
US8240077B2 (en) 2002-03-04 2012-08-14 Larry Holmberg Range finder for weapons
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

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Citations (1)

* 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

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CA2138410A1 (fr) * 1992-07-17 1994-02-03 Lawrence W. Craighead Methode et dispositif d'usinage de lentilles
DE19831305C2 (de) * 1998-07-13 2001-11-29 Wernicke & Co Gmbh Einrichtung an einer Brillenglasrandbearbeitungsmaschine zum dreh- und verschiebefesten Halten eines Rohglases

Patent Citations (1)

* 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

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8059196B2 (en) 1999-03-08 2011-11-15 Larry Holmberg Camera for mounting
US7880793B2 (en) 1999-03-08 2011-02-01 Larry Holmberg Camera with mounting rail
US7965337B2 (en) 1999-03-08 2011-06-21 Larry Holmberg System for mounting camera on bow
US8717497B2 (en) 1999-03-08 2014-05-06 Larry Holmberg Camera for mounting
US8035735B2 (en) 1999-03-08 2011-10-11 Larry Holmberg Camera with weather cover
US20100128166A1 (en) * 1999-03-08 2010-05-27 Larry Holmberg Camera for mounting
US9143663B2 (en) 1999-03-08 2015-09-22 Larry Holmberg Camera for mounting
US8045038B2 (en) 1999-03-08 2011-10-25 Larry Holmberg Video camera with mount
US9521300B2 (en) 1999-03-08 2016-12-13 Larry Holmberg Camera for mounting
US8717496B2 (en) 1999-03-08 2014-05-06 Larry Holmberg Rail mount
US8156680B2 (en) 2002-03-04 2012-04-17 Larry Holmberg Device mounting system for a weapon
US7982858B2 (en) 2002-03-04 2011-07-19 Larry Holmberg Range finder
US8240077B2 (en) 2002-03-04 2012-08-14 Larry Holmberg Range finder for weapons
US20100071247A1 (en) * 2002-03-04 2010-03-25 Larry Holmberg Range finder
US7643132B2 (en) 2002-03-04 2010-01-05 Larry Holmberg Range finder
US8656629B2 (en) 2002-03-04 2014-02-25 Larry Holmberg Range finder for weapons
WO2006042916A1 (fr) * 2004-10-20 2006-04-27 Essilor International Methode et dispositif de blocage d'une lentille ophtalmique en vue de son detourage
FR2876609A1 (fr) * 2004-10-20 2006-04-21 Essilor Int Methode et dispositif de blocage d'une lentille ophtalmique en vue de son detourage
US8046950B2 (en) 2006-01-06 2011-11-01 Larry Holmberg Method of attaching device to weapon
US7926220B2 (en) 2006-10-17 2011-04-19 Larry Holmberg Stabilizing device mount and method
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
US8464409B2 (en) * 2007-02-13 2013-06-18 Essilor International (Compagnie Generale D'optique) Machine for shaping an eyeglass lens, the machine being provided with a turnable tool-carrier having a plurality of working tools mounted thereon
US20100009603A1 (en) * 2007-02-13 2010-01-14 Essilor International (Compagnie Generale D'optique) Machine for shaping an eyeglass lens, the machine being provided with a turnable tool-carrier having a plurality of working tools mounted thereon
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
US20100313461A1 (en) * 2009-06-16 2010-12-16 Larry Holmberg Electronic device mount system with strap
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

Also Published As

Publication number Publication date
DE60216007T2 (de) 2007-07-12
FR2825941A1 (fr) 2002-12-20
ATE345190T1 (de) 2006-12-15
DE60216007D1 (de) 2006-12-28
JP2003071689A (ja) 2003-03-12
EP1266723B1 (fr) 2006-11-15
EP1266723A1 (fr) 2002-12-18
FR2825941B1 (fr) 2003-12-12
ES2276896T3 (es) 2007-07-01

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ESSILOR INTERNATIONAL (COMPAGNIE GENERALE D'OPTIQU

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:GUILLERMIN, LAURENT;REEL/FRAME:013297/0870

Effective date: 20020627

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION