Method of and apparatus for forming folds in a container panel

Details Method of and apparatus for forming folds in a container panel Method of and apparatus for forming folds in a container panel

1974-07-23

1976-03-23

Keenan, Michael J.

113 15A, B21D 5126

Patent

active

039453340

ABSTRACT:
This disclosure relates to the forming of folds in a container panel for the purpose of providing a protective fold both about the periphery of a removable panel segment and about the portion of the container panel from which the removable segment has been removed. The two folds are formed in a continuous operation with first one fold being formed and then the other fold being formed without effecting the rupture of the container panel intermediate the folds along a previously formed line of weakening. A die set is provided for properly supporting the various portions of the container member and for applying pressures on the various panels so as to effect a first folding and then a second folding while supporting that panel of the container member containing the line of weakening so as to prevent rupture thereof along the line of weakening.

REFERENCES:
patent: 3696961 (1972-10-01), Holk, Jr.
patent: 3765352 (1973-10-01), Schubert et al.
patent: 3819083 (1974-06-01), Holk, Jr.
patent: 3825149 (1974-07-01), Brown et al.
patent: 3848557 (1974-11-01), Holk, Jr.
patent: 3853080 (1974-12-01), Zundel

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