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US 3,945,334 AGranted
Method of and apparatus for forming folds in a container panel
AssigneeContinental Can Company, Inc.
InventorsObert M. Ostrem, Donald F. Kulikowski
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AssigneeContinental Can Company, Inc.
InventorsObert M. Ostrem, Donald F. Kulikowski
Estimating the term…
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.
A method of forming a container panel with a removable segment defined by a weakening line and with a protective fold in said panel and said removable segment on opposite sides of and adjacent said weakening line, said method comprising the steps of providing a generally planar container panel lying in a first general plane, deforming said panel about a predetermined outline to define an inner panel lying in a second general plane offset from the first general plane, an intermediate peripheral panel lying in a third general plane intermediate the first general plane and the second general plane, an outer upstanding panel joining said intermediate peripheral panel to said container panel, an inner upstanding panel joining said inner panel to said intermediate peripheral panel, and with said weakening line in said intermediate peripheral panel;
A die set for effecting folding of a container panel having an inner portion thereof deformed to define in sequence an outer upstanding panel, an intermediate peripheral panel offset from the container panel, an inner upstanding panel, and an inner panel offset from both the container panel and the intermediate peripheral panel, said die set comprising a relatively fixed die unit and a cooperating relatively movable die unit;
Dependencies are inferred from the claim text.