GB577467A - Improved method of and apparatus for moulding articles, particularly lenses, from thermoplastic materials - Google Patents

Improved method of and apparatus for moulding articles, particularly lenses, from thermoplastic materials

Info

Publication number
GB577467A
GB577467A GB2017843A GB2017843A GB577467A GB 577467 A GB577467 A GB 577467A GB 2017843 A GB2017843 A GB 2017843A GB 2017843 A GB2017843 A GB 2017843A GB 577467 A GB577467 A GB 577467A
Authority
GB
United Kingdom
Prior art keywords
thermoplastic materials
improved method
moulding articles
lenses
particularly 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.)
Expired
Application number
GB2017843A
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
Application filed by Individual filed Critical Individual
Priority to GB2017843A priority Critical patent/GB577467A/en
Publication of GB577467A publication Critical patent/GB577467A/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
    • B29D11/00009—Production of simple or compound lenses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor

Landscapes

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

Abstract

577,467. Spectacle lenses. ABBEY, A. (American Optical Co.). Dec. 2, 1943, No. 20178. [Class 97 (i)] [Also in Groups V, XXVI and XXIX] Lenses are made from thermoplastic materials by moulding in resilientlymounted dies. A wafer 66 of glass or resin may be incorporated in the (resin) lens to form a bifocal lens.
GB2017843A 1943-12-02 1943-12-02 Improved method of and apparatus for moulding articles, particularly lenses, from thermoplastic materials Expired GB577467A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2017843A GB577467A (en) 1943-12-02 1943-12-02 Improved method of and apparatus for moulding articles, particularly lenses, from thermoplastic materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2017843A GB577467A (en) 1943-12-02 1943-12-02 Improved method of and apparatus for moulding articles, particularly lenses, from thermoplastic materials

Publications (1)

Publication Number Publication Date
GB577467A true GB577467A (en) 1946-05-20

Family

ID=10141686

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2017843A Expired GB577467A (en) 1943-12-02 1943-12-02 Improved method of and apparatus for moulding articles, particularly lenses, from thermoplastic materials

Country Status (1)

Country Link
GB (1) GB577467A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2230730A (en) * 1989-04-28 1990-10-31 Mjs Cast plastics contact lens mould
WO2021092038A1 (en) * 2019-11-06 2021-05-14 Innovega Inc. Apparatuses and methods for multistage molding of lenses

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2230730A (en) * 1989-04-28 1990-10-31 Mjs Cast plastics contact lens mould
GB2230730B (en) * 1989-04-28 1993-01-06 Mjs Lens mould
WO2021092038A1 (en) * 2019-11-06 2021-05-14 Innovega Inc. Apparatuses and methods for multistage molding of lenses
US11426959B2 (en) 2019-11-06 2022-08-30 Innovega, Inc. Apparatuses and methods for multistage molding of lenses
US11794427B2 (en) 2019-11-06 2023-10-24 Innovega, Inc. Apparatuses and methods for multistage molding of lenses
US11826973B2 (en) 2019-11-06 2023-11-28 Innovega, Inc. Apparatuses and methods for multistage molding of lenses

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