Easy-opening container packaging
US5118002A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 1990 |
| Grant date | Jun 2, 1992 |
| Priority date | — |
| Expiry date | Jun 27, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D2577/2066
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A container packaging having a flanged container, and a cover member with which the container is tightly closed by heat sealing at the flange after being filled with a content stuff. This packaging can be easily opened to take out the content by separating the cover member with a human hand force in such a manner that as an end of the cover member is pulled upward, ply separation of a cohesion-destructive plastic layer progresses, or a portion of an outer peripheral threadlike protrusion reduced in thickness is broken and ply separation of cohesion-destructive plastic layer thereafter progresses to the position of an inner peripheral threadlike protrusion, and a portion of this protrusion reduced in thickness is broken.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.