Foam cushioning panels for packaging purposes
US5794406A · kind A · utility
24Cited by
17References
45Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 2, 1996 |
| Grant date | Aug 18, 1998 |
| Priority date | — |
| Expiry date | Oct 2, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C44/588
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus and associated method are disclosed for making a polymer foam cushioning element. The method comprises advancing a pair of sheets of plastic film material in parallel face-to-face relationship; injecting foam precursors between the advancing plastic sheets; sealing the sheets together to form a plastic bag containing the foam precursors; forming the bag into the shape of a panel; and thereafter maintaining the bag in the panel shape until the foam precursors have substantially finished expanding into foam to thereby form a foam cushion panel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.