Method for making a container lid formed as a laminate having a built-in opening feature
US8128776B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 2010 |
| Grant date | Mar 6, 2012 |
| Priority date | — |
| Expiry date | Jun 21, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1057
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A container lid is formed as a flexible laminate of an upper layer and a lower layer and having a built-in opening feature. A pair of radially spaced concentric lines of weakness are formed in the laminate, an outer one of the lines of weakness being formed in the upper layer and an inner one of the lines of weakness being formed in the lower layer. The upper and lower layers in an annular region between the lines of weakness are readily peeled apart. The upper and lower layers outside the annular region are laminated together with an adhesive providing a bond with a greater peel strength than that required to separate the layers in the annular region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.