Method of making lenses

• US 3,248,460 A
• Filed: 02/28/1963
• Issued: 04/26/1966
• Est. Priority Date: 02/28/1963
• Status: Expired due to Term

• Current Assignee: Andrius A. Naujokas
• Original Assignee: Andrius A. Naujokas
• Inventors: Naujokas, Andrius A.
• Application Number:
  US04/261,582
• Time in Patent Office: 1,153 Days
• US Class Current: 264/1.7
• CPC Class Codes: B29D 11/00009 Production of simple or compound lenses
• CPC Class Codes: B29D 11/00028 Bifocal lenses; Multifocal lenses
• CPC Class Codes: B29D 11/00413 made by moulding between two mould parts which are not in direct contact with one another, e.g. comprising a seal between or on the edges B29D11/00019 - B29D11/00355, B29D11/00423, B29D11/00432 take precedence
• CPC Class Codes: B29D 11/00528 Consisting of two mould halves joined by an annular gasket
• CPC Class Codes: Y10S 359/90 Methods
• CPC Class Codes: Y10S 425/808 Lens mold

Claims

1. THE METHOD OF FORMING COMPOSITE BIFOCAL LENS OF SUBSTANTIAL POWER COMPRISING, CASTING A BASE LENS OF A PLASTIC MATERIAL HAVING LIMITED CURVATURES ON THE MAJOR SURFACES OF THE LENS TO PRODUCE APPROXIMATELY HALF OF THE PREDETERMINED POWER DESIRED IN THE COMPOSITE LENS, CASTING A LENS PORTION OF ADDITIONAL PLASTIC MATERIAL INTERGRAL