Method and apparatus for making a curved surface

• US 3,251,908 A
• Filed: 12/05/1962
• Issued: 05/17/1966
• Est. Priority Date: 12/05/1962
• Status: Expired due to Term

• Current Assignee: Gerard W. Wheeler, Kenneth B. Eacott, Wilenius George P T
• Original Assignee: Gerard W. Wheeler, Kenneth B. Eacott, Wilenius George P T
• Inventors: WILENIUS GEORGE P T, Eacott, Kenneth B., Wheeler, Gerard W.
• Application Number:
  US04/242,450
• Time in Patent Office: 1,259 Days
• US Class Current: 264/1.7
• CPC Class Codes: B29C 39/26 Moulds or cores
• CPC Class Codes: B29D 11/00 Producing optical elements, e.g. lenses or prisms grinding or polishing of optical elements B24B; constructional form of optical elements G02B; optical parts of spectacles G02C7/00
• CPC Class Codes: B29D 11/00009 Production of simple or compound lenses
• CPC Class Codes: B29D 11/00548 with surfaces formed by films
• CPC Class Codes: Y10S 425/808 Lens mold

Claims

1. A METHOD OF UTILIZING A MEMBRANE TO FORM A CURVED SURFACE COMPRISING, DIVIDING A CHAMBER INTO TWO ZONES WITH SAID MEMBRANE, DIRECTING INTO ONE OF SAID ZONES A FLUID UNDER A FIRST HEAD AND INTO CONTACT WITH SUBSTANTIALLY THE ENTIRE SURFACE OF ONE SIDE OF SAID MEMBRANE, DIRECTING INTO THE OTHER OF SAID ZONES A HARDENABLE LIQUID PLASTIC MATERIAL UNDER A SECOND HEAD AND INTO CONTACT WITH SUBSTANTIALLY THE ENTIRE SURFACE OF THE OPPOSITE SIDE OF SAID MEMBRANE, AND HARDENING THE LIQUID PLASTIC MATERIAL.