Method of making tubular bag

Details Method of making tubular bag Method of making tubular bag

1982-09-15

1985-01-15

Coan, James F.

Manufacturing container or tube from paper; or other manufacturi

Container making

Pliable container

493195, 493260, 493265, B31B 2360

Patent

active

044936850

ABSTRACT:
In making a tubular bag, a first band of thermosetting glue is printed across the length of a web, and a second and third band of such glue is printed on the opposite side of the web in registry with the ends of the first band. The printed glue is then dried with a heat below that of the softening temperature of the thermosetting glue. Glue is applied to a marginal edge of the web and the marginal edges are overlapped and thus glued together as a back seam. An increment of the tube is severed at said bands without heating such bands, and the web is folded along a line extending centrally through the glue bands. The bands are simultaneously clamped together and heated to fuse the bag layers together at the bands.

REFERENCES:
patent: 2330446 (1943-09-01), Piazze et al.
patent: 2759400 (1956-08-01), Randall
patent: 2820497 (1958-01-01), Rusch
patent: 2837979 (1958-06-01), Vilutis
patent: 3448666 (1969-06-01), Kappelhoff et al.
patent: 3973045 (1976-08-01), Brandberg et al.
patent: 4411643 (1983-10-01), Higginson

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