Method for sealing a plastics lid to a container of plastics-coated paper board and apparatus for carrying out the method
US4217156A · kind A · utility
6Cited by
16References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 17, 1978 |
| Grant date | Aug 12, 1980 |
| Priority date | — |
| Expiry date | Feb 17, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2711/123
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method and an apparatus used for sealing a plastics lid to a container of plastics-coated paper board, the lidded container at several locations in the area which the lid joins the container, being supplied with energy in the form of electromagnetic microwaves, and the energy being absorbed in the paper board to melt for welding of the lid to the container.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.