Method of making rectangular paperboard package

Details Method of making rectangular paperboard package Method of making rectangular paperboard package

1992-11-18

1993-10-05

Terrell, William E.

Manufacturing container or tube from paper; or other manufacturi

Container making

Rigid container

493 69, 493 79, 493134, 493135, 493143, 493187, B31B 316, B31B 325, B31B 346, B31B 364

Patent

active

052500187

ABSTRACT:
A liquid tight rectangular paperboard container (10) is provided with a separate opening tab (17) secured to the top panel (15) thereof which enables the package to be opened to provide a fully open top. In particular, an elongate plastic window (18c) is formed along the front fold line (15a) connecting the top and front panels (15 and 11) of the package, and has ends (18d, 18e) connected to spaced apart arcuate shaped perforated lines (18a, 18b) extending to the rear corners of the top panel. In the construction of the package, the opening tab (17) is first ultrasonically welded to the outside surface of the package blank, and then the window section (18c) is pressed against and welded to the inside surface of the tab. A slit (40) which is formed in the window enables any air trapped between the window and the tab to escape during the welding operation. The package also includes a unique side sealing flap structure, while the particular paper supply roll from which the package is constructed has a unique structure. Also, a unique method of forming the package is disclosed.

REFERENCES:
patent: 3041941 (1962-07-01), Danielzig
patent: 4540392 (1985-09-01), Junod et al.
patent: 4929226 (1990-05-01), Focke et al.
Brochure "Web-Fed Aseptic Packaging System" International Paper Company Mar. 1988 or earlier.

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