Package making – Methods – With contents treating
Patent
1978-12-21
1980-05-06
McGehee, Travis S.
Package making
Methods
With contents treating
53510, B65B 3102
Patent
active
042010306
ABSTRACT:
Packaging apparatus for making vacuum or gas-filled packages of the type including a flanged cup-shaped receptacle with a closure film sealed to the flanges and stretched down into the cup to engage and press against the product. The apparatus comprises a first packaging station where the film is sealed to the cup flanges part way around the cup mouth; simultaneously the film is heated in pre-selected locations to soften it for subsequent stretching. In a subsequent station, the partially-completed package is placed in a vacuum chamber and evacuated. Thereafter, a plug is driven against the still heated film, to force it down into the cup interior adjacent the product. Before or after the plug movement, the film is fully sealed to the cup, to make a hermetically-sealed package. While the plug holds the film in its stretched condition, the spaces outside of the film are vented to apply fluid pressure to the film, to cause the film to conform closely to the product shape, and to match closely the contour of the cup.
REFERENCES:
patent: 3438175 (1969-04-01), Hamilton et al.
patent: 3545163 (1970-12-01), Mahaffy et al.
patent: 3754372 (1973-08-01), Perdue
patent: 3792181 (1974-02-01), Mahaffy et al.
patent: 3895475 (1975-07-01), Wolfelsperger
Mahaffy Reid A.
Mainberger Walter A.
Mahaffy & Harder Engineering Co.
McGehee Travis S.
LandOfFree
Packaging apparatus and techniques for forming closure tops does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Packaging apparatus and techniques for forming closure tops, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Packaging apparatus and techniques for forming closure tops will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-999266