GB1378468A - Method of manufacturing contact lenses - Google Patents

Method of manufacturing contact lenses

Info

Publication number
GB1378468A
GB1378468A GB4148073A GB4148073A GB1378468A GB 1378468 A GB1378468 A GB 1378468A GB 4148073 A GB4148073 A GB 4148073A GB 4148073 A GB4148073 A GB 4148073A GB 1378468 A GB1378468 A GB 1378468A
Authority
GB
United Kingdom
Prior art keywords
lens
radii
peripheral
radius
curve
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
GB4148073A
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.)
Individual
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
Priority to US00281234A priority Critical patent/US3772832A/en
Application filed by Individual filed Critical Individual
Priority to GB4148073A priority patent/GB1378468A/en
Priority to DE19732344558 priority patent/DE2344558A1/en
Priority claimed from DE19732344558 external-priority patent/DE2344558A1/en
Publication of GB1378468A publication Critical patent/GB1378468A/en
Expired legal-status Critical Current

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
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/0025—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor for contact lenses
    • 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

Abstract

1378468 Grinding lenses J H SMITH 4 Sept 1973 41480/73 Heading B3D [Also in Division G2] A method of manufacturing contact lenses comprises mounting a semi-finished lens or blank 10 having a desired base curve 12 for axial rotation, forming its concave side with a plurality of peripheral surfaces of curves 27, 29, 30 having slightly different radii of curvature, each being greater than that of the base curve, holding the lens against rotation, and presenting juncture line removal tools having radii of curvature each between that of an adjacent pair of peripheral curves to effect removal of juncture lines 50, 51, 52. The semi-finished lens may have its convex side 13 finished and has its concave side formed to a desired base curve 12 of radius R1. The lens is initially secured by adhesive 24 to a holder 23 on a freely rotatable shaft 22 arranged at an angle to a rotatable shaft 16 carrying a grinding tool 15 which may be spherical and has a radius R4 greater than R1 and forms a peripheral curve 27 on the lens. Thereafter the procedure is repeated using a grinding tool having a radius R3 between R1 and R4 for forming the peripheral curve 29, and this procedure is again repeated using a tool having a radius R2 between R1 and R3 for grinding the peripheral or annular curve 30. The curves 27, 29, 30 are then polished by tools 35, Fig. 3, having radii which are equal to or slightly less than the radii R2, R3, R4, the lens again being mounted on a holder 23 carried by a freely rotatable shaft. Finally, the lens is secured by adhesive (44, Fig. 4, not shown), to a holder (43) on a non-rotatable shaft (42) and is presented to successive polishing tools (45) for removing the juncture lines 50, 51, 52, the tools having radii between R1 and R2, R2 and R3, and R3 and R4, respectively.
GB4148073A 1972-08-16 1973-09-04 Method of manufacturing contact lenses Expired GB1378468A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US00281234A US3772832A (en) 1972-08-16 1972-08-16 Method of manufacturing contact lenses
GB4148073A GB1378468A (en) 1973-09-04 1973-09-04 Method of manufacturing contact lenses
DE19732344558 DE2344558A1 (en) 1972-08-16 1973-09-04 METHOD OF MANUFACTURING CONTACT LENSES

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB4148073A GB1378468A (en) 1973-09-04 1973-09-04 Method of manufacturing contact lenses
DE19732344558 DE2344558A1 (en) 1972-08-16 1973-09-04 METHOD OF MANUFACTURING CONTACT LENSES

Publications (1)

Publication Number Publication Date
GB1378468A true GB1378468A (en) 1974-12-27

Family

ID=25765736

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4148073A Expired GB1378468A (en) 1972-08-16 1973-09-04 Method of manufacturing contact lenses

Country Status (1)

Country Link
GB (1) GB1378468A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4707949A (en) * 1985-07-26 1987-11-24 Optimed N.V. Method for manufacturing a spectacle-glass for myopes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4707949A (en) * 1985-07-26 1987-11-24 Optimed N.V. Method for manufacturing a spectacle-glass for myopes

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee