Package making – Closing packages and filled receptacles – By means adapted to engage outturned seam of package cover
Patent
1977-01-10
1978-01-31
McGehee, Travis S.
Package making
Closing packages and filled receptacles
By means adapted to engage outturned seam of package cover
B65B 706, B65B 5114
Patent
active
040708535
ABSTRACT:
A machine is described for closing and sealing the upward ends of filled plastic bags. It includes a locating mechanism that positions bags successively at a closing and sealing station. The normally flexible top of each partially filled bag is formed into an upwardly open rectangular configuration by a forming mechanism. A folding mechanism operates to fold transverse short sides of the configuration inwardly. A heat element and associated pad are located on opposite longitudinal sides of the bag. They are pressed together against the folded longitudinal sides to heat the material and allow the sides to fuse together and seal the bag.
REFERENCES:
patent: 2114624 (1938-04-01), Bergstein
patent: 2243805 (1941-05-01), Knapp
patent: 2624995 (1953-01-01), Allen
patent: 3115736 (1963-12-01), Peterson
patent: 3167897 (1965-02-01), Hopkins et al.
patent: 3220161 (1965-11-01), Lohse et al.
patent: 3398503 (1968-08-01), Bertoglio
Culver Horace M.
McGehee Travis S.
Thermoguard Insulation Company
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