Joint on packing containers and a method and arrangement for the manufacture of the same
US4589591A · kind A · utility
6Cited by
8References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1983 |
| Grant date | May 20, 1986 |
| Priority date | — |
| Expiry date | Nov 18, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB31B50/743
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Joints in packing containers of heat-sealable gas-tight laminate are sensitive to deformation, since this often results in a deterioration of the gas-tightness. This is due to the accumulation of melted thermoplastics which is produced during the heat-sealing. This problem is eliminated in that the sealing zone of the joint is given a limited width and is placed at a distance from the edge of the laminate. A method and an arrangement for realizing this comprises a heating zone whose width is limited in relation to the width of the sealing jaws which are used for the sealing together of the material layers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.