Thermoformed closure of composite material
US4347939A · kind A · utility
27Cited by
6References
3Claims
0Family size
Inventor
Key dates
| Filing date | Sep 24, 1976 |
| Grant date | Sep 7, 1982 |
| Priority date | — |
| Expiry date | Sep 24, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D55/022
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An improved container closure which is thermoformed from a sheet of two thermoplastic materials, where one of the materials, which constitutes the inner liner of the closure, is an expanded cellular plastic foam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.