Pump container using laminated bottle with peelable inner layer
US6467653B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 2001 |
| Grant date | Oct 22, 2002 |
| Priority date | — |
| Expiry date | May 23, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2949/3036
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A pumping container including a laminated bottle having a delaminatable layer with an inner layer portion serving as a valve for closing ventilation holes. The laminated bottle has the inner layer delaminated from an outer layer and formed on its inner surface. A ventilation hole formed in the outer layer allows ambient air to flow in between the outer and inner layers. The ventilation hole in the outer layer is temporarily closed with a closing portion of the inner layer from inside such that this closing portion will be deformed inwards due to atmospheric pressure so as to open the ventilation hole in response to a negative pressure appearing between the layers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.