Viscous liquid-dispensing container having a resilient follower
US5303852A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1992 |
| Grant date | Apr 19, 1994 |
| Priority date | — |
| Expiry date | Dec 18, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D2231/001
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A viscous liquid-dispensing container which allows almost all amount of the content thereof to be easily extracted. The container includes a liquid-dispensing section having a head and a shoulder, and inner and outer containers respectively connected with the shoulder. The liquid-dispensing section includes a first check valve for allowing only extraction of the liquid. The outer container includes a second check valve for allowing only introduction of the exterior air. The inner container for accommodating the viscous liquid has a upper sleeve and lower bag connected to the upper sleeve. The upper sleeve is relatively hard, while the lower bag is made of a flexible thin film. After a predetermined amount of liquid is extracted, the lower bag is inverted and invades into the upper sleeve depending on the reduction of the liquid in the inner container.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.