Packing material that can be shaped under the effect of heat
US4039362A · kind A · utility
4Cited by
21References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1974 |
| Grant date | Aug 2, 1977 |
| Priority date | — |
| Expiry date | Jun 14, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1038
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A foamed plastic material of polyethylene or polystyrene capable of being heat-shaped for use in making packing containers wherein by stretching of the foam the cells therein are given a lenticular or elongated structure. In the case of a lenticular cell structure, produced by a bi-axial stretching operation, the individual cells are situated in layers in parallel planes. In the case of an elongated cell structure, produced by a mono-axial stretching operation, the individual cells are situated with their longitudinal axes in parallel planes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.