Shrink film applying apparatus having independently drivable flight bar assemblies
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United States of America Patent
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Aug 7, 2012
Grant Date -
Mar 17, 2011
app pub date -
Sep 12, 2009
filing date -
Sep 12, 2009
priority date (Note) -
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status (Latency Note)
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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.
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