Vacuum packaging goods in heat shrinkable plastic bags using flexible diaphragms
US4457122A · kind A · utility
33Cited by
10References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 21, 1981 |
| Grant date | Jul 3, 1984 |
| Priority date | — |
| Expiry date | Aug 21, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65B31/02
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for vacuum packaging goods in heat shrinkable, thermoplastic bags in a vacuum chamber equipped with flexible, heated diaphragms that can be collapsed upon a filled bag to heat it to shrinking temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.