Two-chamber compressed-gas pack
US4951847A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 1988 |
| Grant date | Aug 28, 1990 |
| Priority date | — |
| Expiry date | Dec 5, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D83/62
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
In twin-chamber compressed gas packs, the collar of a diaphragm which invaginates during motion in the container is secured with its opening region in a fold or in the upper part of the container, in order to provide the required sealing between product chamber and working fluid chamber. The disadvantage of packs of this type is that the use of multi-part containers is mandatory and/or that a support ring incorporated in the diaphragm produces a frictional force which may be large enough to prevent ejection of the feed material because of an insufficient pressure differential between the chambers. These drawbacks are overcome by securing the entire region of the collar to the internal wall of the casing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.