Machine for packaging with single-folded heat-shrinkable film, p

Details Machine for packaging with single-folded heat-shrinkable film, p Machine for packaging with single-folded heat-shrinkable film, p

1992-09-30

1995-01-17

Sipos, John

Package making

Apparatus for contraction of cover by stretching or shrinking

By heat shrinking

533851, 53511, 53568, B65B 5302

Patent

active

053816447

ABSTRACT:
A machine for packaging articles is provided and includes a support for a roll of heat-shrinkable film (12) defined by a fold and two opposing faces (13, 14) which is drawn in a predetermined direction between an article loading station and a film heat shrinking and sealing station. Air is directed transversely to the predetermined direction to open the opposing faces (13, 14) to facilitate the introduction of an article between the faces (13, 14) of the film (12). Thereafter the packaged film is advanced to a heat shrinking and sealing station which includes a chamber (11) having a movable hood (15) and a support (20) with apertures through which hot air can be circulated for shrinking the film. At the same time, an exhaust fan (25) exhausts air from the chamber (11) and the interior of the folded film (12) incident to the shrinking thereof and the eventual heat sealing of at least the free edges of the film faces (13, 14). A pivoted damper (29) controls the flow of air associated with the blower (24).

REFERENCES:
patent: 3233527 (1966-02-01), Membrino
patent: 3429100 (1969-02-01), Zelnick et al.
patent: 3568400 (1971-03-01), Pitts
patent: 3619973 (1971-11-01), Bella
patent: 4104848 (1978-08-01), Torre
patent: 4162604 (1979-07-01), Bartolomei
patent: 4164111 (1979-08-01), Di Bernardo
patent: 4170863 (1979-10-01), Schwanz
patent: 4393640 (1983-07-01), Cole et al.
patent: 4945712 (1990-08-01), Bennett
patent: 5001884 (1991-03-01), Hanagata

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