Packing container and blank for use in the manufacture thereof
US4989736A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 25, 1989 |
| Grant date | Feb 5, 1991 |
| Priority date | — |
| Expiry date | Aug 25, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D5/067
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Packing containers and packing container blanks of the type used for the packaging of, e.g., milk and juice, often are of the so-called gable-top type, in which the top closure also serves as an opening arrangment with a pouring spout which can be folded outwardly. The parts of the packing container or the blank forming the pouring spout may be partially coated with a seal-preventing substance to make it possible for the pouring spout to be detached and opened outwardly in spite of the heat-sealing of the top. The seal-preventing coating in accordance with the invention is covered by a film which extends along the upper edge region of the packing container to provide a better defined sealing strength, a tighter top seal, and protection to the coating both before and after the conversion of the packing container blank to packing containers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.