Abstract: An iron-containing heat-resistant aluminum-based alloy product consisting essentially of, in weight percent: up to 0.15% chromium, 0.80-1.20% copper, 0.80-1.20% iron, 2.20-2.80% magnesium, up to 0.10% manganese, 0.80-1.20% nickel, up to 0.15% silicon, up to 0.15% titanium, 5.50-7.00% zinc, up to 0.25% zirconium, and up to 0.25% scandium, with the balance being aluminum. Also, a manganese-containing heat-resistant aluminum-based alloy product consisting essentially of, in weight percent: up to 0.25% chromium, 0.80-1.20% copper, up to 0.30% iron, 2.30-2.90% magnesium, 2.70-3.10% manganese, 2.85-3.25% nickel, up to 0.15% silicon, up to 0.15% titanium, 6.10-7.10% zinc, up to 0.25% zirconium, and up to 0.25% scandium, with the balance being aluminum.

Abstract: A multi-unit package with a paperboard tray carrying a plurality of articles over which extends a flexible film sheet whose opposite ends overlap the upstanding side walls of the tray. The overlapping ends of the film sheet are bonded to the tray by their own substance under heat and pressure. The film sheet may be heat shrunk to keep it taut.

Abstract: A multi-unit package comprising a cellulosic tray with a group of articles in the tray and a flexible film sheet extending over the group of articles and overlapping the tray side walls where the film sheet has been first bonded to the outside of the tray side walls while leaving an unattached skirt portion between the first bond and the edge of the film sheet and where the unattached skirt portion has been heat bonded to the outside of the tray side walls subsequent to the first bond to cause the skirt portion to lie in juxtaposition with the outside of the tray side walls to enhance the effective transparency of the skirt portion. The method and apparatus for forming the package is also contemplated by the disclosure.

Abstract: A heat control system used in apparatus for packaging articles in a tray by applying a film of thermoplastic material over the articles in the tray. The apparatus includes a plurality of electrically operated heating units successively moving along a prescribed path and adapted to captivate each tray and the film over the articles in the tray between adjacent heating units as the heating units move along a prescribed portion of the prescribed path to press the film against opposite sides of the tray and heat the film to a temperature to cause the film to bond to the tray.

Abstract: A packaging machine for bonding a sheet to opposite walls and over the articles in a paperboard tray. One embodiment has a conveyor to move the trays along a predetermined path that includes, in sequence, a film sheet supply station, a compression and heat bonding station, and a heating tunnel or shrinkage station. As the trays move in the predetermined path, a film sheet is drawn over the tops of the articles in each of the successive trays, and flight bars associated with the compression and heating station interpose the sheet between the trailing and leading walls of each of the successive trays and press the sheet against the adjacent trailing and leading walls. Heating means associated with the said flight bars heat the sheet, while compressed, to form a bond between the sheet and the trailing and leading walls.

Abstract: A package for articles such as cans, bottles, and the like, comprising a corrugated paperboard tray, a film sheet covering said articles, and an adhesive connecting opposite ends of said film sheet to opposed walls of said tray. The sheet may be heat shrunk to hold said articles to the tray and have opposed fully or partially closed ends which overlap the sides of the articles. The sheet may be stretch film that does not require heat shrinking, or it may be plain paper. The package may include an inverted top tray, with or without holes that receive the tops of the articles, to keep the articles in vertical alignment. The package may be double tier.