Method of removing blemishes in compression molded articles
US5958587A · kind A · utility
1Cited by
9References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 21, 1997 |
| Grant date | Sep 28, 1999 |
| Priority date | — |
| Expiry date | Apr 21, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2982
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of compression molding a closure having a base wall and peripheral skirt with internal threads, a thermoplastic resin blended with metallic particles wherein the particles are added in elliptical or spherical form. The metallic particles are provided in a carrier of resin which is then blended with the resin of the closure and the melt blend is extruded through a nozzle and cut into individual pellets. Each pellet is deposited into the cavity of a mold which is then closed to compression mold a closure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.