Package making – Methods – Conforming by stretching or shrinking of cover over contents
Patent
1996-09-17
1998-05-05
Johnson, Linda
Package making
Methods
Conforming by stretching or shrinking of cover over contents
53557, B65B 5302
Patent
active
057460418
ABSTRACT:
The invention provides an endless conveyor having a pair of gaps in its product conveying surface. As a film-wrapped product is conveyed across the gaps, a sensor aligned with the second gap signals the initiation of a shrinking sequence by which a pair of upwardly directed nozzles impinge hot air on the portion of film below and inboard of the transverse film seals. As the flow of hot air begins, a pair of magnetic clutches are activated to transmit power from a drive to a pair of shafts on which each clutch is respectively mounted. The drive, through the clutches, causes each of the nozzles to rotate about an axis so that the stream of hot air follows the travel of the wrapped product to maximize the time of hot air exposure without slowing the speed of product travel. At the end of the arc through which the nozzle is pivoted, the hot air flow is shut off, the magnetic clutches are deactivated, and a biasing spring causes the nozzles to return to their respective starting positions. Subsequently, the package is conveyed through a shrink tunnel providing ambient hot air to shrink the balance of the film wrap.
REFERENCES:
patent: 4228345 (1980-10-01), Stricker et al.
patent: 5062217 (1991-11-01), Tolson
patent: 5193290 (1993-03-01), Tolson
patent: 5398427 (1995-03-01), Tolson
patent: 5546677 (1996-08-01), Tolson
patent: 5590509 (1997-01-01), Esteves et al.
Johnson Linda
Ossid Corporation
LandOfFree
Shrinking selected portions of film wrapped around a product does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Shrinking selected portions of film wrapped around a product, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Shrinking selected portions of film wrapped around a product will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-44946