Vacuum packaging method and apparatus
US4754596A · kind A · utility
22Cited by
7References
9Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jan 28, 1987 |
| Grant date | Jul 5, 1988 |
| Priority date | — |
| Expiry date | Jan 28, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65B31/022
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
In a vacuum packaging apparatus for packaging relatively large articles, a rotary valve is provided over a turntable having a plurality of vacuum chambers at its periphery so that an amount of air is supplementarily discharged from a vacuum chamber into one of other vacuum chambers before a complete vacuum is made and that a small amount of atmospheric air is sucked into the chamber to shrink preliminarily a packaging bag before its open end is sealed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.