US 8,317,671 B1Granted

Paperboard cartons with laminated reinforcing ribbons and method of making same

AssigneeGraphic Packaging International, Inc.

InventorMichael D. Zoeckler

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Abstract

A method of making reinforced paperboard cartons comprises the steps of advancing a web of paperboard along a path and progressively laminating at least one ribbon of reinforcing material to the advancing web of paperboard. The ribbon of reinforcing material, which also may be paperboard, has a width less than the width of the web of paperboard and is applied with adhesive at a selected location across the width of the web. The web and its laminated ribbon are cut into sheets of a predetermined size and the sheets are die-cut and scored with fold lines to form carton blanks. The carton blanks are subsequently formed into cartons for receiving articles, the laminated reinforcing material providing reinforcement in selected portions of the cartons. Multiple ribbons and multiple layers of ribbons may be laminated to the web in respective selected locations to provide reinforcement in more than one portion of the cartons. Reinforced cartons and carton blanks made by the method also are provided.

Claims25

Dependent claims

A method of making a paperboard carton blank to be folded to form a carton having a top wall, a bottom wall, and two side walls, the carton having an inside and an outside, the method comprising the steps of:

(a) advancing a web of noncorrugated paperboard along a path, the web of noncorrugated paperboard having a first surface which will be on the inside of the carton when the blank is folded to form the carton, a width, and longitudinally extending panel portions that will each become a plurality of panels, the longitudinally extending panel portions being separated by longitudinal fold lines;
(b) laminating at least a first ribbon and a second ribbon of reinforcing material to the first surface of the advancing web of noncorrugated paperboard, the first ribbon and the second ribbon having a width less than the width of the web of noncorrugated paperboard, the first ribbon being positioned on, and adhered to, substantially all of, but not beyond, a first longitudinally extending panel portion of the web of noncorrugated paperboard, and the second ribbon being positioned on, and adhered to, substantially all of, but not beyond, a second longitudinally extending panel portion of the web, the first ribbon and the second ribbon not extending across the longitudinal fold lines;
and
(c) cutting the web of noncorrugated paperboard and the laminated first ribbon and second ribbon across their length into a carton blank having panels corresponding to the top wall, the bottom wall, and the two side walls of the carton, whereby the first ribbon and the second ribbon are positioned on the inside of the carton when the carton blank is folded to form the carton, and reinforce the carton blank.

1 more element

A method of making a paperboard carton having a top wall, a bottom wall, and two side walls, the carton having selectively reinforced panels, said method comprising the steps of

(a) advancing a web of noncorrugated paperboard along a path, the web of noncorrugated paperboard having a width and longitudinally extending panel portions that will each become a plurality of panels, the longitudinally extending panel portions being separated by longitudinal fold lines;
(b) progressively applying and adhering at least a first ribbon and a second ribbon of reinforcing material to the advancing web of noncorrugated paperboard, the first ribbon and the second ribbon having a width less than the width of the web of noncorrugated paperboard, the first ribbon being positioned to overlie and adhere to substantially all of, but not beyond, a first selected longitudinally extending panel portion of the web, and the second ribbon being positioned to overlie and adhere to substantially all of, but not beyond, a second selected longitudinally extending panel portion of the web, the first ribbon and the second ribbon not extending across the longitudinal fold lines;
(c) cutting the web of noncorrugated paperboard to form a carton blank having panels corresponding to the top wall, the bottom wall, and the two side walls of the carton;
and
(d) forming the blank into the carton for receiving articles, the carton having an inside and an outside, the first ribbon and the second ribbon of reinforcing material reinforcing the carton and being positioned on the inside of the carton.

2 more elements

Dependencies are inferred from the claim text.