Packaging machine
US5706635A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 11, 1996 |
| Grant date | Jan 13, 1998 |
| Priority date | — |
| Expiry date | Jan 11, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C66/4312
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A packaging machine (1) is adapted to form a web (8) of packaging material into a tube to surround items (3) to be packed, the tube then being closed, sealed and severed between successive items to produce individual packages (5). The tube is formed by sealing one surface of an edge zone of the web to the same surface of the opposite edge zone of the web so that, in the finished package, the sealed zones form a flap (45) extending longitudinally of the package. The machine comprises a support surface (2) having a longitudinal slot (43) therein, the slot being adapted to accommodate the flap, the machine further comprising at least two pairs of rollers (18,22), at least the first (18) of the pairs of rollers being located beneath the support surface (2), the pairs of rollers forming successive nips for gripping the flap (45) and driving the partly formed packages along the support surface (2) towards a closing, sealing and severing station (23) and for forming the required seal between the edge zones of the web (8), and means (32,34) for applying a vacuum to the tube adjacent the point where the edge zones of the web are brought together to form the tube, wherein the width of the lo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.