Article of plastic material having a neck portion including annular protuberances with monoaxially oriented material
US4426416A · kind A · utility
3Cited by
6References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 15, 1983 |
| Grant date | Jan 17, 1984 |
| Priority date | — |
| Expiry date | Feb 15, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1397
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An article of thermoplastic material adapted for being molded into a container comprising a tubular neck portion including annular protuberances of hollow ring-shaped profile, and a tubular shoulder portion continuing from the neck portion. The material of the wall of the neck portion is substantially monoaxially oriented and the annular protuberances are circumferentially expanded from the wall without axial strain of the monoaxially oriented material of the wall whereby the material in the neck portion is of substantially uniform thickness and monoaxially oriented therethroughout including the annular protuberances.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.