Closure unit for a container having a hinged construction, made of different materials and having a film which tears on first opening
US5381935A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 8, 1992 |
| Grant date | Jan 17, 1995 |
| Priority date | — |
| Expiry date | Dec 8, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/565
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The inventive closure unit has a hinge (4), which pivotally interconnects the pouring part (1) and the closure part (2). The hinge (4) comprises at least one bearing part and a pivot part pivotally mounted on the bearing pan. The closure unit is produced according to a multimaterial injection molding process, in such a way that the beating parts are made from one material and the pivot parts from another. As a result of the good matching of such materials molded on one another the pairs of beating surfaces are also tight, so that the hinge (4) can take over part of the sealing function between the pouring pan (1) and the closure pan (2).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.