Method of manufacturing a glass optical part
US5275637A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 1991 |
| Grant date | Jan 4, 1994 |
| Priority date | — |
| Expiry date | Jan 25, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B2215/77
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of pressing flowing-down molten glass from the opposite sides thereof by a pair of shaping mold members to thereby manufacture a glass optical part having surfaces corresponding to the shaping surfaces of the mold members is characterized in that a groove forming ring is provided around the shaping surface of at least one of the shaping mold members, a groove is formed in the molten glass by the groove forming ring during the press and the flowing-down molten glass is cut above that portion thereof which is being pressed, thereby obtaining a glass molded article having an ear protruding outwardly of the groove relative to an optical part body portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.