Package making – With contents treating – Vacuum or inert atmosphere
Patent
1990-05-17
1991-09-17
Sipos, John
Package making
With contents treating
Vacuum or inert atmosphere
53556, 53559, 226173, B65B 4702, B65B 3100
Patent
active
050482688
ABSTRACT:
A packaging method and apparatus employ (i) a thermoforming station 6 through which a support film web 4 is advanced by means of an endless chain carrying clamps 16, followed by (ii) a loading station in which product articles are inserted into the trays formed by the thermoforming station, and (iii) a film-combining station II at which a covering film 3 is stretched longitudinally and then applied in its stretched configuration to the support web 4 (with or without the above-mentioned thermoformed trays) and is clamped thereto for subsequent vacuum skin packaging of the product articles between the support web 4 and the upper film 3. The resulting vacuum skin packs from such a process and apparatus are wrinkle free whereas the conventional vacuum skin packs exhibit longitudinal wrinkling in the covering film.
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Brembilla Sandro
Romani Mario
Lee, Jr. William D.
Quatt Mark B.
Sipos John
Toney John J.
W. R. Grace & Co.,-Conn.
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