Envelopes – wrappers – and paperboard boxes – Paperboard box – Cylindrical or conical body – or wall structure
Patent
1987-10-06
1988-08-02
Marcus, Stephen
Envelopes, wrappers, and paperboard boxes
Paperboard box
Cylindrical or conical body, or wall structure
229 35MF, 229 48T, 428 35, 428 57, 428192, B65D 322
Patent
active
047609494
ABSTRACT:
A composite container includes a high barrier inner liner member including a metal layer of vacuum-deposited aluminum parallel with and spaced from the longitudinal edge of a synthetic plastic base thereby to define a first web that is helically wound in edge-overlapping relation such that one longitudinal edge of the metal strip overlaps the other longitudinal edge of the metal strip by a given distance (d). The overlapping edges of the first web are hermetically joined by a heat-sealable bond between an adhesive layer covering the metal strip and the adjacent face of the first web, and a compatible heat-sealable layer on the opposite face of the web. According to the method for forming the container, the first web is formed by longitudinally slitting a supply web having longitudinally extending spaced metal strips on one face thereof along lines of severance spaced from the edges of the metal strips, so that the edges of the metal strip in the helically wound liner layer will be isolated from the container contents. The resultant container provides high storage stability, particularly for contents that are corrosive to aluminum.
REFERENCES:
patent: 3279675 (1966-10-01), Elam et al.
patent: 3386645 (1968-06-01), Powell
patent: 4286745 (1981-09-01), Fukuoka
Elkins Gary E.
Marcus Stephen
Sonoco Products & Company
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