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专利名称：Vacuum packaging method and apparatus发明人：SANDRO BREMBILLA,MARIO ROMANI申请号：AU6114990申请日：19900821公开号：AU3453B2公开日：19931118
摘要：A packaging method and apparatus employ (i) a thermoforming station 6through which a support film web 4 is advanced by means of an endless chain carryingclamps 16, followed by (ii) a loading station (A) in which product articles are inserted intothe trays formed by the thermoforming station, and (iii) a film-combining station B atwhich a covering film 3 is stretched longitudinally and then applied in its stretchedconfiguration to the support web 4 (with or without the above-mentioned thermoformedtrays) and is clamped thereto for subsequent vacuum skin packaging of the productarticles (at C) between the support web 4 and the upper film 3 by a process similar tothat disclosed in EP-A-0270208. The resulting vacuum skin packs from such a process andapparatus are wrinkle free whereas the conventional vacuum skin packs exhibitlongitudinal wrinkling in the covering film.
申请人：W.R. GRACE & CO.-CONN.
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