Equipment for the packaging of products in a modified and controlled atmosphere, with a stretchable and gas-tight film
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United States of America Patent
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Feb 13, 2001
Grant Date -
N/A
app pub date -
Nov 9, 1998
filing date -
Sep 18, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A packaging machine which carries out the conventional packaging of products with a stretchable and gas-tight film is housed in a main chamber (1) which is seable and contains a modified and controlled atmosphere suitable for the conservation of the product to be packaged. The product enters and leaves the main chamber by passing through corresponding sealable airlock chambers (7, 8) provided with corresponding automatic doors (107, 207, 108, 208) and in any case designed to provide a seal with respect to the external environment and to the main chamber to which these chambers are attached. When the outer sides of the airlock chambers are opened, their inner sides are closed, so that the modified and controlled atmosphere cannot issue from the main chamber. Before the airlock chambers are connected to the main chamber, these chambers have their outer sides closed and a mechanism may be provided to evacuate the ambient atmosphere from them and, if necessary, fill them with the modified and controlled atmosphere.
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