Molding devices and process for making a molded plastic lens mount
US3971841A · kind A · utility
45Cited by
6References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 20, 1974 |
| Grant date | Jul 27, 1976 |
| Priority date | — |
| Expiry date | Jun 20, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/808
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Molding devices and methods for producing a low cost, multi-element, adjustable focus lens assembly for use in photographic apparatus. The assembly features a two-part molded plastic lens mount comprising forward and rear mounts, each having an uncentered lens element insert molded and centered therein and an integrally molded screw thread for coupling the forward and rear mounts together. The molding devices comprise cavity molds having movably mounted zonal clamps therein for centering the lens element within the cavity and for disengaging the molded mounts from surfaces in the molds that form the screw threads.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.