Package making – Multiple bottle or can carrier type package – Wrap
Patent
1975-08-31
1977-08-23
McGehee, Travis S.
Package making
Multiple bottle or can carrier type package
Wrap
53 32, 53140, 53230, 425516, B65B 716
Patent
active
040430960
ABSTRACT:
In a packaging process in which a molten sheet of thermosetting or thermoplastic resin material is extruded and projected from a film forming head and the articles to be packaged are moved along a conveyor underlying the head so as to intercept the projected sheet of resin material and be enveloped and covered thereby, apparatus and method are disclosed for developing a suction or vacuum at a location beneath the conveyed articles substantially underlying the extruded sheet of resin. A pressure differential is created about each article, in which the pressure is substantially reduced about the lower or bottom surface so as to cause the intercepted, molten sheet of resin material to be drawn around the upper portions of the article and sealed about the perimeter of the article's bottom surface. Simultaneously with this wrapping and sealing, excess resin film is trimmed away from the article and collected in a scrap basket disposed in the air stream used in developing the suction effect. The suction further acts as a tensioning device to prevent the projected film from running with the packages. A blower unit is arranged to provide the suction at an intake opening thereof, while a discharge port of the same blower unit is disposed to direct cooling air on the packaged articles downstream of the film forming head. Also disclosed is a package including a container tray adapted to receive packageable contents and having a construction especially adapted for use in conjunction with the above-mentioned packaging process and apparatus.
REFERENCES:
patent: 3132966 (1964-05-01), Hughes
patent: 3178866 (1965-04-01), Wallis
patent: 3307327 (1967-03-01), Liedtke
patent: 3331728 (1967-07-01), Lane
patent: 3341354 (1967-09-01), Woods
patent: 3433694 (1969-03-01), Nuttall
patent: 3449886 (1969-06-01), Connelly
patent: 3468099 (1969-09-01), Vogt
patent: 3500610 (1970-03-01), Chenoweth
patent: 3596432 (1971-08-01), Straub
patent: T879001 (1970-10-01), Horiszny
McGehee Travis S.
Sipos John
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