GB1488001A - Contact lenses - Google Patents

Contact lenses

Info

Publication number
GB1488001A
GB1488001A GB4677573A GB4677573A GB1488001A GB 1488001 A GB1488001 A GB 1488001A GB 4677573 A GB4677573 A GB 4677573A GB 4677573 A GB4677573 A GB 4677573A GB 1488001 A GB1488001 A GB 1488001A
Authority
GB
United Kingdom
Prior art keywords
lens
blank
machining
support
edge
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
Application number
GB4677573A
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.)
GLOBAL VISION Ltd
Original Assignee
GLOBAL VISION Ltd
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 GLOBAL VISION Ltd filed Critical GLOBAL VISION Ltd
Priority to GB4677573A priority Critical patent/GB1488001A/en
Priority to IT2799474A priority patent/IT1022556B/en
Priority to CA210,694A priority patent/CA1028881A/en
Priority to JP11398674A priority patent/JPS5641361B2/ja
Priority to NL7413141A priority patent/NL178852C/en
Priority to FR7433545A priority patent/FR2246369B1/fr
Priority to DE19742447490 priority patent/DE2447490C2/en
Priority to ES430697A priority patent/ES430697A1/en
Priority to BE149272A priority patent/BE820771A/en
Priority to US05/610,244 priority patent/US4084458A/en
Publication of GB1488001A publication Critical patent/GB1488001A/en
Priority to CA295,342A priority patent/CA1049818A/en
Priority to JP464980A priority patent/JPS56157945A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00932—Combined cutting and grinding thereof

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Ophthalmology & Optometry (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Eyeglasses (AREA)
  • Turning (AREA)

Abstract

1488001 Machining contact lenses GLOBAL VISION (UK) Ltd 3 Oct 1974 [6 Oct 1973] 46775/73 Heading B3T In a method of making a contact lens having two mutually curved lens surfaces 90, 91 the circumference edge 92 surface of the lens is machined after machining one of the curved surfaces but before the machining of the other of the two curved surfaces. A lens blank 10 is located in a rotatable support 11 and a first cutting tool 20 is traversed in an arcuate path about an axis transverse to the axis of rotation of the lens blank and support to machine one of the curved surfaces on the lens blank, e.g. the concave surface 90. Without removing the blank from the support a second tool 30 is moved into contact with the edge 92 of the lens to machine the peripheral edge. The machining of the edge at this stage in the manufacture of the lens provides additional rigidity of the material during machining by edging tool 30 and the avoidance of handling by removal of the blank from the support. The two aforsaid operations having been completed a further tool 40 is applied radially to the lens blank to reduce the diameter of the blank and form a frusto-conical surface 93 adjacent the edge. The lens blank is then removed from the support 11 and secured to a second support 61 by a thermoplastic adhesive 60. A microscope 62 mounted on the machine is then used to determine the position of the crown 63 of the first curved surface and a further cutting tool 70 then machines the second of the two curved surfaces. A lathe for machining the lens is shown diagrammatically in Fig. 10 and includes a chuck 101, carried by headstock 102, which supports the blank support 11, a pivotable tool carrier 103 with the cutting tool 20 and edge cutting tool 30 mounted thereon for successive operation by pivoting the carrier 103. Cross slides carrying tools 111, and 109 respectively for initial machining of the blank and chamfering the lens edge, and a microscope 62 for detecting the crown of the first curved surface 90 for use in detecting the accurate location of the second curved surface. Although the concave surfaces is shown as the first to be machined, the convex may alternatively be the first surface to be machined.
GB4677573A 1973-10-06 1973-10-06 Contact lenses Expired GB1488001A (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
GB4677573A GB1488001A (en) 1973-10-06 1973-10-06 Contact lenses
IT2799474A IT1022556B (en) 1973-10-06 1974-10-02 PROCEDURE AND MACHINE FOR MANUFACTURING SOFT AND CONTACT LENSES SO OBTAINED
CA210,694A CA1028881A (en) 1973-10-06 1974-10-03 Manufacture of contact lenses
FR7433545A FR2246369B1 (en) 1973-10-06 1974-10-04
NL7413141A NL178852C (en) 1973-10-06 1974-10-04 METHOD AND APPARATUS FOR MANUFACTURING A SOFT CONTACT LENS
JP11398674A JPS5641361B2 (en) 1973-10-06 1974-10-04
DE19742447490 DE2447490C2 (en) 1973-10-06 1974-10-04 Method and apparatus for making soft contact lenses
ES430697A ES430697A1 (en) 1973-10-06 1974-10-04 Contact lenses
BE149272A BE820771A (en) 1973-10-06 1974-10-07 MANUFACTURING OF CONTACT LENSES
US05/610,244 US4084458A (en) 1973-10-06 1975-09-29 Manufacture of contact lenses
CA295,342A CA1049818A (en) 1973-10-06 1978-01-20 Apparatus for the manufacture of contact lenses
JP464980A JPS56157945A (en) 1973-10-06 1980-01-21 Manufacturing device for contact lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4677573A GB1488001A (en) 1973-10-06 1973-10-06 Contact lenses

Publications (1)

Publication Number Publication Date
GB1488001A true GB1488001A (en) 1977-10-05

Family

ID=10442545

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4677573A Expired GB1488001A (en) 1973-10-06 1973-10-06 Contact lenses

Country Status (9)

Country Link
JP (2) JPS5641361B2 (en)
BE (1) BE820771A (en)
CA (1) CA1028881A (en)
DE (1) DE2447490C2 (en)
ES (1) ES430697A1 (en)
FR (1) FR2246369B1 (en)
GB (1) GB1488001A (en)
IT (1) IT1022556B (en)
NL (1) NL178852C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4745672A (en) * 1982-05-14 1988-05-24 Sealey Michael J Method of manufacturing contact lenses

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6321552U (en) * 1977-08-02 1988-02-12
FR2509483A1 (en) * 1981-04-15 1983-01-14 Essilor Int CONTACT LENS

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3112581A (en) * 1961-02-03 1963-12-03 Hoffman Jacob Contact lens finishing machine
DE1495381B2 (en) * 1963-09-07 1971-06-24 Czeskoslovenska akademie ved , Prag METHOD FOR MANUFACTURING CONTACT LENSES OR CONTACT LENS BLOCKS FROM SWELLABLE HYDROGELS
FR2195930A5 (en) * 1972-08-10 1974-03-08 Bausch & Lomb

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4745672A (en) * 1982-05-14 1988-05-24 Sealey Michael J Method of manufacturing contact lenses
US5115553A (en) * 1982-05-14 1992-05-26 The Cooper Companies, Inc. Contact lens manufacturing apparatus

Also Published As

Publication number Publication date
IT1022556B (en) 1978-04-20
BE820771A (en) 1975-02-03
FR2246369B1 (en) 1978-07-07
JPS5641361B2 (en) 1981-09-28
ES430697A1 (en) 1977-04-16
FR2246369A1 (en) 1975-05-02
JPS56157945A (en) 1981-12-05
NL178852C (en) 1986-06-02
NL178852B (en) 1986-01-02
DE2447490A1 (en) 1975-04-17
NL7413141A (en) 1975-04-08
CA1028881A (en) 1978-04-04
JPS5078339A (en) 1975-06-26
DE2447490C2 (en) 1985-11-07

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19921003