GB837727A - Method and apparatus for forming lens blanks - Google Patents

Method and apparatus for forming lens blanks

Info

Publication number
GB837727A
GB837727A GB28120/58A GB2812058A GB837727A GB 837727 A GB837727 A GB 837727A GB 28120/58 A GB28120/58 A GB 28120/58A GB 2812058 A GB2812058 A GB 2812058A GB 837727 A GB837727 A GB 837727A
Authority
GB
United Kingdom
Prior art keywords
mass
minor segment
blank
molten glass
segment
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
GB28120/58A
Other languages
English (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.)
PPG Industries Inc
Original Assignee
Pittsburgh Plate Glass Co
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 Pittsburgh Plate Glass Co filed Critical Pittsburgh Plate Glass Co
Publication of GB837727A publication Critical patent/GB837727A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/20—Uniting glass pieces by fusing without substantial reshaping
    • C03B23/22—Uniting glass lenses, e.g. forming bifocal lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • G02C7/06—Lenses; Lens systems ; Methods of designing lenses bifocal; multifocal ; progressive

Landscapes

  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
GB28120/58A 1957-10-07 1958-09-02 Method and apparatus for forming lens blanks Expired GB837727A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US837727XA 1957-10-07 1957-10-07

Publications (1)

Publication Number Publication Date
GB837727A true GB837727A (en) 1960-06-15

Family

ID=22180599

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28120/58A Expired GB837727A (en) 1957-10-07 1958-09-02 Method and apparatus for forming lens blanks

Country Status (2)

Country Link
BE (1) BE571668A (pl)
GB (1) GB837727A (pl)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3178274A (en) * 1958-05-13 1965-04-13 Pittsburgh Plate Glass Co Ophthalmic glass

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3178274A (en) * 1958-05-13 1965-04-13 Pittsburgh Plate Glass Co Ophthalmic glass

Also Published As

Publication number Publication date
BE571668A (pl)

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