Packaging

Details Packaging Packaging

1975-01-02

1976-05-25

McGehee, Travis S.

Package making

Interrelated or safety controls

53 28, 53112A, 53180R, B65B 3104

Patent

active

039583902

ABSTRACT:
The method of and apparatus for packaging units in flexible sheet material which is heat-sealable at least on one side, in which a web of the material is formed into a tube with an inside-face-to-inside-face longitudinal seam by bringing the side margins of the web into inside-face-to-inside-face engagement and pressing them together at a sealing station, and heating the inside faces of said margins as they converge toward one another and meet at the sealing station by directing a stream of hot gas against them. Transverse seals are formed across the tube at package length intervals with a unit to be packaged in the tube between successive transverse seals. The gas may be a preservative gas for preservation of the unit in each package. Additionally, preservative gas may be introduced into the tube downstream from said sealing station.

REFERENCES:
patent: 3009298 (1961-11-01), Gerlach et al.
patent: 3090174 (1963-05-01), Kraft
patent: 3210905 (1965-10-01), Gerlach
patent: 3274746 (1966-09-01), James et al.
patent: 3777448 (1973-12-01), Howe
patent: 3788917 (1974-01-01), Linda

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