Method for forming carton

Claim 1

The method of forming a carton from a T-shaped blank having a plurality of parallel first identation lines defining side-wall panels of the carton and establishing folding lines, and further having second indentation lines generally normal to the first indentation lines defining and establishing folding lines for sealing flaps at the ends of all but one of said side-wall panels and in the case of said one side-wall panel the second indentation lines defining and establishing folding lines for end panels of the carton, and further having third indentation lines defining and establishing folding lines for sealing flaps at the free edges of the end panels, and further having a sealing flap along the free edge of one of the two outer side-wall panels which comprises the steps of: folding the side-wall panels inwardly along the indentation lines defining them to the configuration of an open-ended tube with the sealing flap along the free edge of said one of the two outer side-wall panels overlapped by the free edge of the side-wall panel most remote therefrom in the blank; attaching together the overlapping side-wall panel and sealing flap to form an open-ended empty tube; folding the end panels in upon the ends of the open-ended empty tube and into overlying engagement with the sealing flaps at the ends of the side-wall panels having end flaps; folding the sealing flaps of the end panels into engagement with the side-wall panels; attaching together the sealing flaps of the side-wall panels and the end panels overlapping them; and attaching together side-wall panels and the sealing flaps overlapping them.

Claim 2

The method of forming a carton from a T-shaped blank having a plurality of parallel first identation lines defining side-wall panels of the carton and establishing folding lines, and further having second indentation lines generally normal to the first indentation lines defining and establishing folding lines for sealing flaps at the ends of all but one of said side-wall panels and in the case of said one side-wall panel the second indentation lines defining and establishing folding lines for end panels of the carton, and further having third indentation lines defining and establishing folding lines for sealing flaps at the free edges of the end panels, and further having a sealing flap along the free edge of one of the two outer side-wall panels which comprises the steps of: folding the side-wall panels inwardly along the indentation lines defining them to the configuration of an open-ended tube with the sealing flap along the free edge of said one of the two outer side-wall panels overlapped by the free edge of the side-wall panel most remote therefrom in the blank; attaching together the overlapping side-wall panel and sealing flap to form an open-ended empty tube; folding the end panels in upon the ends of the open-ended empty tube and into overlying engagement with the sealing flaps at the ends of the side-wall panels having end flaps; folding the sealing flaps of the end panels into engagement with the side-wall panels; attaching together the sealing flaps of the side-wall panels and the end panels overlapping them; and attaching together side-wall panels and the sealing flaps overlapping them.

Claim 6

The method of forming a carton from components comprising an open-ended tube of polygonal cross-section having inwardly foldable sealing flaps integral with at least some of the walls of the tube at both ends of the tube and end-closure panels integral with at least one of said side walls and having a polygonal configuration matching that of the tube, which comprises the steps of: establishing a condition for permanent interengagement between the outer surfaces of the sealing fLaps and the inner surfaces of the end-closure panels; folding the sealing flaps inwardly and bringing the integral end-closure panels into generally flush closure relation to the ends of the open-ended empty tube with the inner surfaces of the end-closure panels in surface engagement with the sealing flaps; and simultaneously applying pressure against the end-closure panels which opposing pressures are borne solely by the empty tube itself, to complete the permanent interengagement between the end-closure panels and the sealing flaps.

Claim 7

The method of forming a carton from components comprising an open-ended tube of polygonal cross-section having inwardly foldable sealing flaps integral with at least some of the walls of the tube at both ends of the tube and end-closure panels integral with at least one of said side walls and having a polygonal configuration matching that of the tube, which comprises the steps of: establishing a condition for permanent interengagement between the outer surfaces of the sealing fLaps and the inner surfaces of the end-closure panels; folding the sealing flaps inwardly and bringing the integral end-closure panels into generally flush closure relation to the ends of the open-ended empty tube with the inner surfaces of the end-closure panels in surface engagement with the sealing flaps; and simultaneously applying pressure against the end-closure panels which opposing pressures are borne solely by the empty tube itself, to complete the permanent interengagement between the end-closure panels and the sealing flaps.

Claim 8

The method of forming a carton from components comprising an open-ended tube of polygonal cross-section having inwardly foldable sealing flaps integral with at least some of the walls of the tube at both ends of the tube and end-closure panels integral with at least one of said walls and having a polygonal configuration matching that of the tube and provided with sealing flaps, which comprises the steps of: establishing a condition for permanent interengagement between the outer surfaces of the sealing flaps on the walls of the tube and the inner surfaces of the end-closure panels; establishing a condition for permanent interengagement between the sealing flaps of the end-closure panels and the surfaces of the walls of the tube; folding the sealing flaps of the walls of the tube inwardly and bringing the intergral end-closure panels into generally flush closure relation to the ends of the open-ended empty tube with the inner surfaces of the end-closure panels in surface engagement with the sealing flaps; folding the sealing flaps of the end-closure panels into surface engagement with the walls of the tube; and simultaneously applying pressure against the end-closure panels which opposing pressures are borne solely by the empty tube itself, to complete the permanent interengagement between the end-closure panels and the tube.

Claim 9

The method of forming a carton from components comprising an open-ended tube of polygonal cross-section having inwardly foldable sealing flaps integral with at least some of the walls of the tube at both ends of the tube and end-closure panels integral with at least one of said walls and having a polygonal configuration matching that of the tube and provided with sealing flaps, which comprises the steps of: establishing a condition for permanent interengagement between the outer surfaces of the sealing flaps on the walls of the tube and the inner surfaces of the end-closure panels; establishing a condition for permanent interengagement between the sealing flaps of the end-closure panels and the surfaces of the walls of the tube; folding the sealing flaps of the walls of the tube inwardly and bringing the intergral end-closure panels into generally flush closure relation to the ends of the open-ended empty tube with the inner surfaces of the end-closure panels in surface engagement with the sealing flaps; folding the sealing flaps of the end-closure panels into surface engagement with the walls of the tube; and simultaneously applying pressure against the end-closure panels which opposing pressures are borne solely by the empty tube itself, to complete the permanent interengagement between the end-closure panels and the tube.

Claim 10

The method of forming a carton from components comprising an open-ended tube of polygonal cross-section having inwardly foldable end-to-end interconnected sealing flaps integral with at least some of the walls of the tube at both ends of the tube and end-closure panels integral with at least one of said walls and having a polygonal configuration matching that of the tube and provided with sealing flaps, which comprises the steps of; establishing a condition for permanent interengagement between the outer surfaces of the sealing flaps on the walls of the tube and the inner surfaces of the end-closure panels; establishing a condition for permanent interengagement between the sealing flaps of the end-closure panels and the surfaces of the walls of the tube; folding the sealing flaps of the walls of the tube inwardly and thereby producing bulging protuberances at the points of interconnection of flaps; bringing the end-closure panels into generally flush closure relation to the ends of the open-ended empty tube with the inner surfaces of the end-closure panels pressing upon the protuberances and into surface engagement with the sealing flaps; folding the sealing flaps of the end-closure panels into surface engagement with the walls of the tube; and simultaneously applying pressure against the end-closure panels which opposing pressures are borne solely by the empty tube itself, to complete pressing down of the protuberances and the permanent interengagement between the end-closure panels and the tube.

Claim 11

The method of forming a carton from components comprising an open-ended tube of polygonal cross-section having inwardly foldable end-to-end interconnected sealing flaps integral with at least some of the walls of the tube at both ends of the tube and end-closure panels integral with at least one of said walls and having a polygonal configuration matching that of the tube and provided with sealing flaps, which comprises the steps of; establishing a condition for permanent interengagement between the outer surfaces of the sealing flaps on the walls of the tube and the inner surfaces of the end-closure panels; establishing a condition for permanent interengagement between the sealing flaps of the end-closure panels and the surfaces of the walls of the tube; folding the sealing flaps of the walls of the tube inwardly and thereby producing bulging protuberances at the points of interconnection of flaps; bringing the end-closure panels into generally flush closure relation to the ends of the open-ended empty tube with the inner surfaces of the end-closure panels pressing upon the protuberances and into surface engagement with the sealing flaps; folding the sealing flaps of the end-closure panels into surface engagement with the walls of the tube; and simultaneously applying pressure against the end-closure panels which opposing pressures are borne solely by the empty tube itself, to complete pressing down of the protuberances and the permanent interengagement between the end-closure panels and the tube.

Claim 12

The method of forming a carton from components comprising an open-ended tube of polygonal cross-section having inwardly foldable end-to-end interconnected sealing flaps integral with at least some of the walls of the tube at both ends of the tube and end-closure panels integral with at least one of said walls and having a polygonal configuration matching that of the tube and provided with sealing flaps, which comprises the steps of: establishing a condition for permanent interengagement between the outer surfaces of the sealing flaps on the waLls of the tube and the inner surfaces of the end-closure panels; establishing for permanent interengagement between the sealing flaps of the end-closure panels and the surfaces of the walls of the tube; folding the sealing flaps of the walls of the tube inwardly and thereby producing bulging protuberances at the points of interconnection of flaps; bringing the end-closure panels into generally flush closure relation to the ends of the open-ended empty tube with the inner surfaces of the end-closure panels pressing upon the protubrances and into surface engagement with the sealing flaps; folding the sealing flaps of the end-closure panels into surface engagement with the walls of the tube; and applying pressure against the end-closure panels to complete pressing down of the protuberances and the permanent interengagement between the end-closure panels and the tube.

Claim 13

The method of forming a carton from components comprising an open-ended tube of polygonal cross-section having inwardly foldable end-to-end interconnected sealing flaps integral with at least some of the walls of the tube at both ends of the tube and end-closure panels integral with at least one of said walls and having a polygonal configuration matching that of the tube and provided with sealing flaps, which comprises the steps of: establishing a condition for permanent interengagement between the outer surfaces of the sealing flaps on the waLls of the tube and the inner surfaces of the end-closure panels; establishing for permanent interengagement between the sealing flaps of the end-closure panels and the surfaces of the walls of the tube; folding the sealing flaps of the walls of the tube inwardly and thereby producing bulging protuberances at the points of interconnection of flaps; bringing the end-closure panels into generally flush closure relation to the ends of the open-ended empty tube with the inner surfaces of the end-closure panels pressing upon the protubrances and into surface engagement with the sealing flaps; folding the sealing flaps of the end-closure panels into surface engagement with the walls of the tube; and applying pressure against the end-closure panels to complete pressing down of the protuberances and the permanent interengagement between the end-closure panels and the tube.