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GB1516194A - Contact lenses - Google Patents

Contact lenses

Info

Publication number
GB1516194A
GB1516194A GB2809575A GB2809575A GB1516194A GB 1516194 A GB1516194 A GB 1516194A GB 2809575 A GB2809575 A GB 2809575A GB 2809575 A GB2809575 A GB 2809575A GB 1516194 A GB1516194 A GB 1516194A
Authority
GB
Grant status
Application
Patent type
Prior art keywords
position
lenses
lens
moulding
contact
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
GB2809575A
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.)
Kelvin Lenses Ltd
Original Assignee
Kelvin Lenses 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

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00Producing optical elements, e.g. lenses or prisms
    • B29D11/00009Production of simple or compound lenses
    • B29D11/00038Production of contact lenses
    • B29D11/00259Plants for the production of contact lenses
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C31/00Handling, e.g. feeding of the material to be shaped, storage of plastics material before moulding; Automation, i.e. automated handling lines in plastics processing plants, e.g. using manipulators or robots
    • B29C31/006Handling moulds, e.g. between a mould store and a moulding machine
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/04Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles using movable moulds
    • B29C43/06Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles using movable moulds continuously movable in one direction, e.g. mounted on chains, belts

Abstract

1516194 Moulding contact lenses KELVIN LENSES Ltd 3 July 1975 28095/75 Heading B5A A continuous process for the manufacture of contact lenses from a blank of a thermoplastic material, mouldable under the influence of temperature and pressure, which will form a dimensionally stable lens comprises: moving a plurality of moulding stations between a series of positions; at a first position, feeding a female tool into the mould and heating to a predetermined temperature; at a feed position, feeding the contact lens blank on to each of the female tools; at a third position, feeding a male tool heated to a predetermined temperature on to each of the blanks; at a fourth position, applying and maintaining a predetermined pressure to the blank; cooling the moulding tools containing the moulded lens; and at a final position discharging the moulding tools from each other and releasing the moulded lens. The blank is suitably made from partly polymerised polymethylmethacrylate, polymerization being completed while in the mould.
GB2809575A 1975-07-03 1975-07-03 Contact lenses Expired GB1516194A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2809575A GB1516194A (en) 1975-07-03 1975-07-03 Contact lenses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2809575A GB1516194A (en) 1975-07-03 1975-07-03 Contact lenses

Publications (1)

Publication Number Publication Date
GB1516194A true true GB1516194A (en) 1978-06-28

Family

ID=10270182

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2809575A Expired GB1516194A (en) 1975-07-03 1975-07-03 Contact lenses

Country Status (1)

Country Link
GB (1) GB1516194A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0227365A2 (en) * 1985-12-19 1987-07-01 Minnesota Mining And Manufacturing Company Method and apparatus for making optical devices
EP0686489A2 (en) * 1994-06-10 1995-12-13 JOHNSON & JOHNSON VISION PRODUCTS, INC. Method and apparatus for contact lens mold filling and assembly
EP0686491A2 (en) * 1994-06-10 1995-12-13 JOHNSON & JOHNSON VISION PRODUCTS, INC. Consolidated contact lens molding
EP0687550A2 (en) * 1994-06-10 1995-12-20 JOHNSON & JOHNSON VISION PRODUCTS, INC. Low oxygen molding of soft contact lenses
EP0750982A3 (en) * 1995-05-01 1997-02-05 Johnson & Johnson Vision Prod
EP1177090A1 (en) * 1998-10-30 2002-02-06 Optima Inc. Continuous extrusion-compression molding process for making optical articles
US6627124B1 (en) 1997-10-21 2003-09-30 Novartis Ag Single mould alignment
US7213382B2 (en) 1998-12-21 2007-05-08 Johnson & Johnson Vision Care, Inc. Heat seal apparatus for lens packages

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0227365A3 (en) * 1985-12-19 1988-09-28 Minnesota Mining And Manufacturing Company Method and apparatus for making optical devices
EP0227365A2 (en) * 1985-12-19 1987-07-01 Minnesota Mining And Manufacturing Company Method and apparatus for making optical devices
EP1273430A2 (en) * 1994-06-10 2003-01-08 JOHNSON & JOHNSON VISION PRODUCTS, INC. Consolidated contact lens molding
EP0686489A2 (en) * 1994-06-10 1995-12-13 JOHNSON & JOHNSON VISION PRODUCTS, INC. Method and apparatus for contact lens mold filling and assembly
EP0687550A2 (en) * 1994-06-10 1995-12-20 JOHNSON & JOHNSON VISION PRODUCTS, INC. Low oxygen molding of soft contact lenses
EP0686491A3 (en) * 1994-06-10 1996-11-20 Johnson & Johnson Vision Prod Consolidated contact lens molding
EP0687550A3 (en) * 1994-06-10 1996-11-20 Johnson & Johnson Vision Prod Low oxygen molding of soft contact lenses
EP0686489A3 (en) * 1994-06-10 1996-11-20 Johnson & Johnson Vision Prod Method and apparatus for contact lens mold filling and assembly
EP1273430A3 (en) * 1994-06-10 2004-11-24 JOHNSON & JOHNSON VISION PRODUCTS, INC. Consolidated contact lens molding
EP0686491A2 (en) * 1994-06-10 1995-12-13 JOHNSON & JOHNSON VISION PRODUCTS, INC. Consolidated contact lens molding
US6039899A (en) * 1994-06-10 2000-03-21 Johnson & Johnson Vision Products, Inc. Consolidated contact lens molding
US6511617B1 (en) 1994-06-10 2003-01-28 Johnson & Johnson Vision Care, Inc. Consolidated contact lens molding
US5804107A (en) * 1994-06-10 1998-09-08 Johnson & Johnson Vision Products, Inc. Consolidated contact lens molding
EP0750982A3 (en) * 1995-05-01 1997-02-05 Johnson & Johnson Vision Prod
US6627124B1 (en) 1997-10-21 2003-09-30 Novartis Ag Single mould alignment
EP1177090A1 (en) * 1998-10-30 2002-02-06 Optima Inc. Continuous extrusion-compression molding process for making optical articles
EP1177090A4 (en) * 1998-10-30 2004-08-04 Optima Inc Continuous extrusion-compression molding process for making optical articles
US7213382B2 (en) 1998-12-21 2007-05-08 Johnson & Johnson Vision Care, Inc. Heat seal apparatus for lens packages

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Legal Events

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