GB1445197A - Apparatus and method for rounding the edge of an opthalmic lens - Google Patents
Apparatus and method for rounding the edge of an opthalmic lensInfo
- Publication number
- GB1445197A GB1445197A GB3683573A GB3683573A GB1445197A GB 1445197 A GB1445197 A GB 1445197A GB 3683573 A GB3683573 A GB 3683573A GB 3683573 A GB3683573 A GB 3683573A GB 1445197 A GB1445197 A GB 1445197A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lens
- edge
- mould
- support
- cam
- 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
Links
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
- B24B9/142—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 for contact lenses
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
- Eyeglasses (AREA)
Abstract
1445197 Edging contact lenses BAUSCH & LOMB Inc 2 Aug 1973 [10 Aug 1972 (2)] 36835/73 Headings B3D and B3X A method of contouring the edge 45 of a contact lens 47 while firmly supported in a lens mould 49 and constituting with the mould a lens and mould assembly, the edge 45 being adjacent a face of the mould, the contouring being effected by apparatus 11 having a rotating material removing surface 44, comprises placing the assembly in a position spaced from the surface 44, inducing relative movement along a prescribed path between the surface and assembly to effect engagement of the lens with the surface, automatically centering the lens on the surface to substantially simultaneously engage all portions of the edge with the surface, maintaining the engagement with a constant force for a preselected period to remove a portion of the edge, and automatically disengaging the edge from the surface. In apparatus for carrying out the method, the lens and mould assembly is placed on a support 29 mounted for universal movement and rotation by means of a ball 31 on the end of an arm pivoted to a pair of bearing blocks 23 on a base 13. A slot 26 intermediate the length of the arm receives a roller 27 which is supported by a pin 28 and is urged by a spring 25 into engagement with a cam 19 on the drive shaft 18 of a motor 17 carried by a support 15. A second support 35 carries a motor 37 the drive shaft 39 of which has a plastics material collar 41 holding a metal sphere 53 which has a finely textured surface 44 of approximately 30 RMS constituting the material removing surface. Rotation of the cam 19 moves the arm 21 from a position spaced from the surface 44 to permit a lens and mould assembly to be placed on the support 29 to a position in which the edge 45 of the lens engages the surface 44 with a force determined by the spring 25 and for a time determined by the shape of the cam so that the surface 44 contours the edge of the lens 47, the cam thus moving the lens away from the surface. The ball 31 permits the support 29 to pivot as the lens engages the surface so that substantially simultaneous engagement of all the edge of the lens occurs with the surface 44 and the rotation of the surface imparts rotation to the lens. In another embodiment, the surface is constituted by a layer 139 of tight woven silk cloth over a layer 138 of cotton cloth on a metal sphere 137. Glycerin may be applied during contouring, a splash guard 143 being provided.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US27955572A | 1972-08-10 | 1972-08-10 | |
| US00279554A US3835596A (en) | 1972-08-10 | 1972-08-10 | Apparatus for and method of removing material from a flexible contact lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1445197A true GB1445197A (en) | 1976-08-04 |
Family
ID=26959741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3683573A Expired GB1445197A (en) | 1972-08-10 | 1973-08-02 | Apparatus and method for rounding the edge of an opthalmic lens |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS4960241A (en) |
| AR (1) | AR201488A1 (en) |
| DE (1) | DE2338858A1 (en) |
| FR (1) | FR2195930A5 (en) |
| GB (1) | GB1445197A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2514253C1 (en) * | 2012-11-01 | 2014-04-27 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Омский государственный технический университет" | Method of hardening by surface plastic forming |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1488001A (en) * | 1973-10-06 | 1977-10-05 | Global Vision Ltd | Contact lenses |
| JPS5593121A (en) * | 1979-01-09 | 1980-07-15 | Toray Ind Inc | Method and apparatus for processing peripheral edge of soft contact lens |
| US4534723A (en) * | 1984-01-30 | 1985-08-13 | International Hydron Corporation | Cutting device for the precision trimming of the edge of a centrifugally cast lens |
| FR2875155B1 (en) * | 2004-09-10 | 2006-12-08 | Essilor Int | POLISHING TOOL COMPRISING A TRAINING TRAY AND A REMOVABLE SKATE FOR FINISHING AN OPHTHALMIC LENS |
-
1973
- 1973-07-25 FR FR7327180A patent/FR2195930A5/fr not_active Expired
- 1973-07-31 DE DE19732338858 patent/DE2338858A1/en active Pending
- 1973-08-02 GB GB3683573A patent/GB1445197A/en not_active Expired
- 1973-08-08 AR AR24951073A patent/AR201488A1/en active
- 1973-08-10 JP JP8990273A patent/JPS4960241A/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2514253C1 (en) * | 2012-11-01 | 2014-04-27 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Омский государственный технический университет" | Method of hardening by surface plastic forming |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2195930A5 (en) | 1974-03-08 |
| JPS4960241A (en) | 1974-06-11 |
| AR201488A1 (en) | 1975-03-21 |
| DE2338858A1 (en) | 1974-02-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |