GB2014896A - Removing molded lenses from the mold - Google Patents

Removing molded lenses from the mold

Info

Publication number
GB2014896A
GB2014896A GB7901070A GB7901070A GB2014896A GB 2014896 A GB2014896 A GB 2014896A GB 7901070 A GB7901070 A GB 7901070A GB 7901070 A GB7901070 A GB 7901070A GB 2014896 A GB2014896 A GB 2014896A
Authority
GB
United Kingdom
Prior art keywords
container
lens
mold
cutting
molded lenses
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.)
Granted
Application number
GB7901070A
Other versions
GB2014896B (en
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 claimed from US05/875,857 external-priority patent/US4155962A/en
Application filed by Individual filed Critical Individual
Publication of GB2014896A publication Critical patent/GB2014896A/en
Application granted granted Critical
Publication of GB2014896B publication Critical patent/GB2014896B/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
    • B29D11/00942—Combined cutting and grinding thereof where the lens material is mounted in a support for mounting onto a cutting device, e.g. a lathe, and where the support is of machinable material, e.g. plastics

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Ophthalmology & Optometry (AREA)
  • Mechanical Engineering (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

A method of making plastic lenses comprises casting a liquid monomer in a container 3 having the required optical curve 2 on the bottom of the container, polymerizing the monomer to form a solid 6 having an optical surface formed within the container and cutting a second optical surface 9 on the solid lens material with the container supporting the lens material during the cutting and polishing operation. The lens is removed from the casting container by applying force against the sides 11, 12 of the container to distort the container and stretching the surface 2 to effect the release of the lens 6. <IMAGE>
GB7901070A 1978-02-07 1979-01-11 Method of removing molded lenses from the mould Expired GB2014896B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/875,857 US4155962A (en) 1977-05-25 1978-02-07 Method of removing molded lenses from the mold

Publications (2)

Publication Number Publication Date
GB2014896A true GB2014896A (en) 1979-09-05
GB2014896B GB2014896B (en) 1982-05-19

Family

ID=25366480

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7901070A Expired GB2014896B (en) 1978-02-07 1979-01-11 Method of removing molded lenses from the mould

Country Status (2)

Country Link
CA (1) CA1119763A (en)
GB (1) GB2014896B (en)

Also Published As

Publication number Publication date
GB2014896B (en) 1982-05-19
CA1119763A (en) 1982-03-16

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19980111