Paperboard cartons with liquid-proof liners
US3952940A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 24, 1975 |
| Grant date | Apr 27, 1976 |
| Priority date | — |
| Expiry date | Feb 24, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D5/703
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A container for liquids such as milk comprises an outer paperboard carton and an inner tubular liner of flexible plastic film adhered to the carton, the liner being adhered to the walls of the carton adjacent diagonally opposite corners of one end of the carton. The sidewalls of the carton adjacent one of these corners are formed with a line of weakness, the liner being adhered to the carton on either side of this line so that the corner may be lifted from the remainder of the carton to split both the carton and the liner and allow the contents of the container to be discharged from a pouring lip thus formed at the corner of the container.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.