Package making – Methods – With contents treating
Patent
1992-06-04
1993-09-28
Coan, James F.
Package making
Methods
With contents treating
53109, 53510, 53478, B65B 3104, B65B 3106
Patent
active
052477460
ABSTRACT:
Apparatus for atmosphere-modifying and sealing individual trays includes a film disposing roller disposed closely adjacent the top of the tray to define a nip region and an elongated gas injection nozzle spanning the nip region for injecting gas through the nip region between the film and the tray. A split conveyor belt advances the trays past the film disposing roller to a sealing unit utilizing band sealers for the longitudinal tray edges and reciprocal "hot bar" sealer for the leading and trailing tray edges. The gas injection nozzle injects the gas substantially perpendicular to the advancing direction, down and into the individual trays. An optional second gas nozzle provides a gas flow curtain across the tray leading edge.
REFERENCES:
patent: 3026656 (1962-03-01), Rumsey, Jr.
patent: 3343332 (1967-09-01), Mahaffy et al.
patent: 3673760 (1972-07-01), Canamero et al.
patent: 4409252 (1983-10-01), Buschkens et al.
patent: 4624099 (1986-11-01), Harder
patent: 4685274 (1987-08-01), Garwood
patent: 5071667 (1991-12-01), Grune et al.
Bagwell, Jr. Thomas M.
Conner Howard D.
Johnson Randall E.
Zende Charles C.
Coan James F.
Gregory Leigh P.
Lee, Jr. William D.
Quatt Mark B.
W. R. Grace & Co.,-Conn.
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