Plastic pellet cleaning apparatus and method for optical lense molding
US4280303A · kind A · utility
0Cited by
3References
11Claims
0Family size
Inventor
Key dates
| Filing date | May 1, 1980 |
| Grant date | Jul 28, 1981 |
| Priority date | — |
| Expiry date | May 1, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29B9/16
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A plastic pellet cleaning apparatus and method for producing plastic pellets for optical lense molding is provided. The plastic is melted and molded utilizing an injection molding process to produce optical lenses which will be used for a variety of applications. The apparatus and method disclosed will produce plastic pellets substantially clean of contaminants which would otherwise cause microscopic defects in the optical lenses produced therefrom. Generally, optical lenses produced which have these defects are rejected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.