Package making – Interrelated or safety controls
Patent
1976-07-21
1977-07-05
McGehee, Travis S.
Package making
Interrelated or safety controls
53210, B65B 1112
Patent
active
040330893
ABSTRACT:
A method of automatically wrapping in plastic film a shallow tray filled with irregularly-shaped contents such as meat or vegetables is provided. No elevator for tray movement is required yet the method forms a lap seal on the bottom of the tray with any of the modern soft plastic films, including stretching and shrink films. The trays advance into a curtain of the plastic film arranged transversely to a tray feed track. A first air blower blows onto the film surface above the tray, billowing the film smoothly ahead of the tray to prevent folds from forming in the film and to keep moving air between the tray and the film during tray advance to avoid snagging therebetween. A lower edge of the film is captured between the tray bottom and tray support rollers. The film is draped over the top and back of the tray. A second fan blows air upwardly onto the under-tucked film to ensure proper placement thereof. A tucking device displaces the support rollers downwardly and tucks and forms a lap joint between the film ends beneath the stationary tray. End folders then tension and fold the tubed ends of the film upwardly to the sides of the tray and downwardly to the bottom of the tray prior to shrinking or final heat treatment of the film.
REFERENCES:
patent: 3546836 (1970-12-01), Buob et al.
patent: 3816969 (1974-06-01), Zimmerman et al.
LandOfFree
Package wrapping method and apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Package wrapping method and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Package wrapping method and apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-569577