Shrink film applying apparatus having independently drivable flight bar assemblies
US8234846B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 2009 |
| Grant date | Aug 7, 2012 |
| Priority date | — |
| Expiry date | Oct 21, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65G2201/0244
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A shrink film applying apparatus includes an article feed for feeding articles for shrink-wrapping at line pressure; a wrapping conveyor driven at a wrapping speed through a wrapping zone, the wrapping conveyor receiving articles from the article feed. First and second films are supplied to the wrapping zone. A plurality of flight bars are individually driven in a path at a variable speed. A sealing mechanism within the wrapping zone seals the first film to the second film at contact points to form a circumferential film unit substantially surrounding grouped articles within loops of second film and a corresponding portion of the first film, the film unit being shrinkable about the grouped articles to form a package. Related methods and subassemblies of the apparatus are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.