Method and device for end closure of packaging tubes
US6574946B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 14, 2000 |
| Grant date | Jun 10, 2003 |
| Priority date | — |
| Expiry date | Jul 14, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/601
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for the end closure of packaging tubes is provided. In one embodiment, the tube which is to be sealed presents an intermediate wall having a surplus length across the tube cross-section, and the intermediate wall is fixed at the filling end of the tube to the tube wall and along two joining locations extending along the length of the tube.A hot air nozzle with two sub-members forming a gap therebetween is inserted into the opening in the filling end, and parts of the intermediate wall and the inside of the tube intended for sealing are heat activated in a non-contacting manner.Apparatus for producing a clamping action is pressed against the heat activated tube end and the intermediate wall. This apparatus includes a pair of clamping jaws arranged for translatory motion perpendicular to the tube axis and initially in a direction at an angle to a line through the joining locations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.