Method of controlling vacuum and pressure within a thermoplastic container
US12017835B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2020 |
| Grant date | Jun 25, 2024 |
| Priority date | — |
| Expiry date | Jun 25, 2040 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB67C2003/226
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A method of forming a container and filling the container with a product. The method includes heat-set blow molding the container from a preform and hot-filling the container with the product such that the product occupies about 95% or more of a total interior volume of the container. A headspace volume is defined between a top fill line of the product and a brim of the container. The headspace volume is less than about 5% of the total interior volume of the container. The container is capped and allowed to cool. The container is configured to shrink during cooling such that the total interior volume decreases by about 0.5% to 1.5% during cooling. A base of the container is displaced after hot-filling and capping to reduce the total interior volume by less than about an additional 0.5% to 4%. The hot-filling, capping, cooling, and displacing of the base creates a pressure change within the container.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.