| 摘要 |
A hermetically sealed package comprises a substantially rigid base (22), preferably a tray, a product (23) to be packaged, which in a preferred embodiment is higher than the tray side walls, supported on the tray (22), and a stretch film (15) welded to the substantially rigid base (22) along a sealing line so as to form a hermetically sealed enclosure for the product. In a method and a machine for manufacturing a hermetically sealed package (101) a stretch film (15) is stretched by means of a stretching frame (17) against a base (22) along a pressure line and is heat welded by means of a sealing frame (18) to the base (22) along a sealing line so as to form a hermetically sealed enclosure for a product (23).
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