B - Operations – Transporting – 65 – B
Patent
B - Operations, Transporting
65
B
156/59
B65B 11/12 (2006.01)
Patent
CA 1053559
ABSTRACT A method of, and apparatus for, 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 system forms a lap seal on the bottom of the tray with 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 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 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.
281573
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