Method of forming a container using a liquid
US11179874B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 16, 2016 |
| Grant date | Nov 23, 2021 |
| Priority date | — |
| Expiry date | Mar 3, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB67C2003/2671
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of forming a container from a plastic preform while using a liquid as a blow medium. During the method, liquid is withdrawn from the container to reduce pressure within the container prior to disengaging of the injection head from the container. In one aspect the method involves the opening of a recirculation valve to reduce the pressure. The opening of the recirculation valve allowing air dispersed within the liquid to rise to the top of the container before disengaging of a forming head from the container. As a result, splashing and spillage of liquid from the neck of the container is eliminated when the forming head disengages from the container.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.