Method of producing a non-cutting tear-off line and the products obtained
US5103989A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1990 |
| Grant date | Apr 14, 1992 |
| Priority date | — |
| Expiry date | Feb 28, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D41/62
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
According to the invention, a metallic product of a thickness less than or equal to 1 mm is compressed between a narrow elongated relief (2, 3) and an alternating succession of reliefs (10) and hollows (11) disposed opposite this narrow relief (2, 3), the differences in level between the said alternating reliefs (10) and hollows (11) being transverse in respect of the said narrow relief (2, 3), the compression stress being such that the minimum thicknesses of the said metallic product after compression are comprised between 0.01 and 0.15 mm. This method makes it possible to obtain tearing lines which have no injurious rough portions. The invention likewise relates to the products obtained and is particularly interesting in the field of packaging.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.