Preform for producing plastic containers in a two-stage stretch blow-moulding process
US8617676B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 23, 2012 |
| Grant date | Dec 31, 2013 |
| Priority date | — |
| Expiry date | Jun 9, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/139
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A preform is disclosed for producing plastic flasks in a two-stage stretch blow-molding process, including a preform base, an elongated preform body, including one longitudinal end sealed to the preform base and another longitudinal end sealed to the neck portion a neck portion with threaded sections or positive protrusions, wherein the preform is manufactured from a plastic that is suitable for the stretch blow-molding process, which has a refractive index of 1.3 to 1.6 at a temperature of 10° C. to 120° C., and in that an outside wall and an inside wall of the preform base bound a flat divergent lens, and in each case have radii of curvature (c, b) that are larger by at least a factor 1.4 than a related radius of curvature (s) of an outside wall or a radius of curvature (R) of an inside wall of the preform in the area of the preform body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.