Thermoplastic container parison
US4463056A · kind A · utility
25Cited by
7References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 26, 1981 |
| Grant date | Jul 31, 1984 |
| Priority date | — |
| Expiry date | Oct 26, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1397
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A thermoplastic, generally tubular parison for the blow molding of a thermoplastic container and a method and apparatus for same. The parison includes a finish or neck having a single helical thread extending less than 360.degree. about the circumference of the finish. The radius of the parison at any point on the outside surface is less than the radius through the crest of the helical thread, whereby the parison can be injection molded in an injection molding apparatus with an injection mold comprising all axially movable mold sections.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.