Apparatus and methods for producing shrink wrap packaging
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 25, 2006
Grant Date -
May 5, 2005
app pub date -
Oct 29, 2003
filing date -
Oct 29, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus (10) is disclosed including a web of film (20) extending between first and second pairs of pinch rollers (12-15) and onto a vacuum table (18). A rotary cutter (46) positioned before the first pair of pinch rollers (12, 13) includes laterally extending and spaced knives (52) for creating cuts (54, 58) in the film (20) which expand into vent openings (54′) positioned over the sides (68) of the product (72) when the film (20) is wrapped around and shrunk upon the product (72). A further rotary cutter (30) positioned between the pairs of pinch rollers (12-15) includes a cut-off knife (36) and first and second blades (44). The cut-off knife (36) creates a cut (60) in the film (20) to form a single sheet of film (20) and includes notches (38) in its cutting edge to form tie strips (62) connecting the single sheet to the web of film (20). A kicker plate (84) of a rotatable tie strip breaker (80) engages the cut film (20) on the vacuum table (18) at the trailing edge and at a speed faster than the film (20) is being conveyed to place tensional force on and breaking the tie strips (62).
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully