Blank for use in forming a container having a rounded edge

Details Blank for use in forming a container having a rounded edge Blank for use in forming a container having a rounded edge

1989-02-21

1990-09-11

Elkins, Gary E.

Envelopes, wrappers, and paperboard boxes

Paperboard box

Box includes straight sidewalls and rounded corners

229 45, 229DIG4, B65D 504

Patent

active

049555316

ABSTRACT:
To produce a container with a rounded edge, the container blank is scored with several substantially parallel, laterally spaced score lines adjacent the intended location of the rounded edge. When the blank is bent, a portion of the total deflection is absorbed by each score line so that the resulting container edge is a gradual curve rather than a single sharp crease. The ends of each scored region may be left unscored to further smooth the ends of the rounded container edge. Methods and apparatus for forming the above-described blank are disclosed.

REFERENCES:
patent: 416115 (1889-11-01), Mayall
patent: 758672 (1904-05-01), Mayall
patent: 1102877 (1914-07-01), Clark
patent: 1482569 (1924-02-01), Lange
patent: 1565765 (1925-12-01), Walter
patent: 1821668 (1931-09-01), Ross
patent: 2043419 (1936-06-01), Robinson
patent: 2371317 (1945-03-01), Ringler
patent: 2586301 (1952-02-01), Castle
patent: 2634563 (1953-04-01), Magill et al.
patent: 3526566 (1970-09-01), McIlvain, Jr. et al.

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