Collapsible dispensing tube with an orifice sealed with multi-layer sealant sheet material
US4750642A · kind A · utility
8Cited by
4References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 28, 1985 |
| Grant date | Jun 14, 1988 |
| Priority date | — |
| Expiry date | Oct 28, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D2251/0093
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A collapsible dispensing tube has a multi-layer sheet material sealed over its dispensing orifice to provide a hermetically sealed tube. The multi-layer sealant sheet comprises two layers of metal foil separated by a polymer layer firmly adhered to the metal foil layers. A polymeric layer is adhered to the outer surface of one of the metal foil layers and serves to seal the tube orifice. The laminated sheet may be sealed across the orifice by the application of radio-frequency energy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.