초록 ▼

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 widt

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 fold lines may transition from non-reinforced to reinforced portions of the blank and a special transition zone is contemplated to accommodate the transition. 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. Reinforcing ribbons may be deformed or altered to exhibit, for instance, corrugations or perforations prior to being adhered to the base sheet. Reinforced cartons and carton blanks made by the method also are provided.

대표청구항 ▼

1. A method comprising the steps of: (a) advancing a web of paperboard along a first path, the web of paperboard having a width;(b) advancing a plurality of ribbons of reinforcing material along a second path, the ribbons each having a width less than the width of the web of paperboard;(c) progressi

1. A method comprising the steps of: (a) advancing a web of paperboard along a first path, the web of paperboard having a width;(b) advancing a plurality of ribbons of reinforcing material along a second path, the ribbons each having a width less than the width of the web of paperboard;(c) progressively altering at least one ribbon of the plurality of ribbons of reinforcing material to form a pattern in the at least one ribbon of reinforcing material that enhances adhesion of the at least one altered ribbon to the web of paperboard; the pattern comprising an array of perforations in the at least one altered ribbon of reinforcing material; and(d) progressively laminating the plurality of ribbons of reinforcing material to the web of paperboard at predetermined locations across the width of the web. 2. The method of claim 1, wherein step (c) comprises passing the at least one ribbon of reinforcing material between a pair of cylinders. 3. The method of claim 1, wherein the plurality of ribbons are formed from a single web of reinforcing material. 4. The method of claim 3, wherein after the plurality of ribbons are formed, the plurality of ribbons are separated and move along separate selectively positioned paths. 5. The method of claim 1, wherein each of the plurality of ribbons are progressively altered before being laminated to the web of paperboard. 6. The method of claim 1, wherein the reinforcing material is paperboard. 7. The method of claim 1, further comprising the step of forming reinforced carton blanks from the web of paperboard and reinforcing material. 8. The method of claim 1, wherein step (c) comprises forming an array of perforations in each of the plurality of ribbons of reinforcing material. 9. The method of claim 1, wherein in step (d) the at least one altered ribbon is laminated to the web by liquid adhesive, the adhesive flowing through at least some of the perforations to form an interlocking bond between the at least one altered ribbon and the adhesive. 10. The method of claim 9, wherein the liquid adhesive is applied to the at least one altered ribbon before the altered ribbon is laminated to the web. 11. The method of claim 9, wherein the adhesive is applied by nip rollers. 12. The method of claim 9, wherein the adhesive is applied by spraying. 13. A method comprising the steps of: (a) advancing a web of paperboard along a first path, the web of paperboard having a width;(b) advancing at least one ribbon of reinforcing material along a second path, the at least one ribbon having a width less than the width of the web of paperboard;(c) progressively altering the at least one ribbon of reinforcing material to form a pattern in the at least one ribbon of reinforcing material that enhances adhesion of the at least one altered ribbon to the web of paperboard; the pattern comprising an array of perforations covering substantially the entire surface of the at least one altered ribbon of reinforcing material; and(d) progressively laminating the at least one altered ribbon of reinforcing material to the web of paperboard at a predetermined location on the web. 14. The method of claim 13, wherein step (c) comprises passing the at least one ribbon of reinforcing material between a pair of cylinders. 15. The method of claim 13, wherein a plurality of ribbons of reinforcing material are laminated to the web at predetermined locations across the width of the web. 16. The method of claim 15, wherein the plurality of ribbons are formed from a single web of reinforcing material. 17. The method of claim 16, wherein after the plurality of ribbons are formed, the plurality of ribbons are separated and move along separate selectively positioned paths. 18. The method of claim 15, wherein each of the plurality of ribbons are progressively altered before being laminated to the web of paperboard. 19. The method of claim 15, wherein step (c) comprises forming an array of perforations covering substantially the entire surface of each of the plurality of ribbons of reinforcing material. 20. The method of claim 13, wherein the reinforcing material is paperboard. 21. The method of claim 13, further comprising the step of forming reinforced carton blanks from the web of paperboard and reinforcing material. 22. The method of claim 13, wherein in step (d) the at least one altered ribbon is laminated to the web by liquid adhesive, the adhesive flowing through at least some of the perforations to form an interlocking bond between the at least one ribbon and the adhesive. 23. The method of claim 22, wherein the liquid adhesive is applied to the at least one ribbon before the altered ribbon is laminated to the web. 24. The method of claim 22, wherein the adhesive is applied by nip rollers. 25. The method of claim 22, wherein the adhesive is applied by spraying.