Apparatus for facilitating inflow through closure threads of dispenser
US4239132A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 1978 |
| Grant date | Dec 16, 1980 |
| Priority date | — |
| Expiry date | Oct 31, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B11/0041
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Dispensing apparatus for a flexible container, including a closure for the container and an expansible bladder associated with the closure and adapted to fit within the container to expand and displace the dispensed contents. The closure has two openings, one at which it is attached to the container and the other forming an outlet for dispensing. A conduit extends from the bladder into the closure and communicates to the exterior of the closure and container through one of the two openings. The outlet opening is constructed to allow the contents to flow only in a direction from the container during use and a check valve allows flow through the conduit only into the bladder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.