Container with welded on cover and screw cap
US4893718A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 22, 1988 |
| Grant date | Jan 16, 1990 |
| Priority date | — |
| Expiry date | Nov 22, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D2577/205
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention concerns a tube with a plastic neck and with a cover to be welded over the neck after its cap has been fixed, the cover having at least one projecting portion for pulling it off, with cap holding the cover while it is being sealed over the neck. The cover has one or more projecting tabs, at least one of which is used to pull off the sealed cover and the cover is deformable and has little or no resilience. The end of the cap has a shoulder to press the cover onto the neck, which shoulder is configured so that it does not bear on the burrs of the neck, and the neck and cap have space between them for the bent back projecting tab or tabs of the cover. The invention also concerns a method of sealing the tube by induction or ultrasonic welding. The invention is used for the packaging of toiletries, cosmetics or food products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.