Folding carton blank and method of forming same
AssigneeRiverwood International Corporation
InventorRaymond O. Bertsch
Life of this patent
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Abstract
A modified glue flap of a folding carton blank for preventing glue from being squeezed out during the step of adhering the glue flap to the opposite end panel. The face of the glue flap engaged by the glue back-up wheel includes a protrusion near the trailing edge of the flap. Engagement of the protrusion by the back-up wheel causes the glue wheel to skip the trailing area of the flap. The absence of glue in this area prevents glue from being squeezed out when sealing pressure is subsequently applied to the glue flap and the opposite end panel. The protrusion may take the form of an embossed ridge, forming a channel on the opposite side of the protrusion for receiving any excess glue which would have been squeezed out.
Claims6
In a method for forming a folded carton blank of the type comprising a plurality of foldably connected panels, wherein the method comprises the steps of applying glue by means of a glue wheel to a face of a glue flap foldably connected to an end panel of a moving carton blank, the glue being applied along the length of the moving flap, and adhering the glue face of the flap to an opposite end panel, the improvement comprising:
- embossing the glue flap to provide means for preventing application of excess glue from the glue wheel, said means being located near the trailing edge of the glue flap and comprising a protrusion on the face of the glue flap opposite the glue face and a corresponding recess in the glue face thereof, the recess being sufficiently spaced from the glue wheel so as not to receive glue therefrom.
Dependencies are inferred from the claim text.