Inversion foamer
US4846376A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 25, 1988 |
| Grant date | Jul 11, 1989 |
| Priority date | — |
| Expiry date | Feb 25, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B11/043
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A nonaerosol foamer comprised of an outer container or bottle and novel internal labyrinth structure comprising a slotted body covered along one face with a film of durable synthetic resinous material whereby separate air and liquid influent channels, a foaming site, and a separate foam effluent channel are defined. The liquid influent channel is constructed such that it allows controlled movement of the foamable liquid from the liquid reservoir to the foaming site during application of positive pressure within the outer container, while preventing siphoning of the foam. A novel film flap valve controls flow of influent air into the container to replenish air earlier used to produce foam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.