Container and paperboard blanks for forming same

Claim 2

A packaging container comprising: a wall member having first and second overlapping end portions secured one to the other for forming a continuously curved container wall having a central axis, first and second edges, and first and second edge portions, said container wall having a plurality of spaced-apart cuts formed in said first edge portion of said container wall with a middle portion of each said cut being spaced a uniform distance from said first edge of said container wall, each said cut being of arcuate configuration with the ends of each said cut being located closer to said second edge of said container wall than said middle portion of each said cut, portions of the container wall adjacent said cuts toward said second edge of said container extending inwardly to a location spaced from said axis a distance less than the distance from said axis to the remainder of said container wall, said portions thereby forming a plurality of ledges along an inner surface of said container wall; a bottom closure member having a continuously curved perimetEr and being positioned at said first edge portion of said container wall in contact with said ledges for closing one end of said container, said perimeter of said bottom closure member being of substantially the same length as said first edge of said container wall; and means for maintaining said bottom closure member in contact with said ledges.

Claim 3

A container, as set forth in claim 1, wherein said cuts are of an arcuate configuration with the ends of each cut being located nearer than the middle portion of each cut to the second edge of the container.

Claim 4

A container, as set forth in claim 1, wherein said means comprises at least a portion of the first edge portion of the wall member being folded into contact with the bottom closure member.

Claim 5

A container, as set forth in claim 1, wherein a plurality of notches are formed at spaced-apart locations along the first edge portion of the wall member thereby forming a plurality of tabs, said tabs being infolded toward and into contact with the bottom closure member.

Claim 6

A container, as set forth in claim 4, wherein said notches comprise first notches and second notches of different configuration, adjacent first notches being separated by intervening second notches.

Claim 7

A container, as set forth in claim 4, including an adhesive located on only a portion of each said tab thereby maintaining said tab portion in contact with associated edge portions of the container walls for maintaining the tabs in contact with the bottom closure member.

Claim 8

A container, as set forth in claim 6, wherein the other portions of the tab are folded inwardly toward the axis for providing a plurality of tab ledges for contacting and maintaining the bottom closure member relative to the closure walls.

Claim 9

A container, as set forth in claim 6, wherein the portion of the tabs having the adhesive thereon is the middle portion of the tabs as measured around the first edge of the container walls.

Claim 10

A paperboard blank for forming a continuously curved sidewall of a container, said blank comprising a generally rectangular wall member having first and second overlap end portions, first and second edge portions, and first and second edges, the length of said first edge between said overlap end portions being substantially equal to the peripheral length of a bottom closure member which is to be employed to form the bottom of said container, said first edge portion having a fold line extending across said wall member substantially parallel to said first edge and spaced a first distance therefrom, a plurality of spaced-apart notches extending from said first edge to said fold line thereby forming tabs between said notches, and a plurality of spaced-apart cuts formed on said first edge portion with a middle portion of each said cut being spaced from said fold line a second distance toward said second edge of said wall member, said spaced-apart cuts each being of arcuate configuration with said middle portion of each cut being closer to said fold line than the ends of the respective cut, each said tab being provided with means for sealing a middle portion thereof to another surface of said wall member, said first distance being at least substantially equal to the difference between said second distance and the thickness of said bottom closure member which is to be employed to form the bottom of said container.

Claim 11

A paperboard blank for forming a continuously curved sidewall of a container, said blank comprising a generally rectangular wall member having first and second overlap end portions, first and second edge portions, and first and second edges, the length of said first edge between said overlap end portions being substantially equal to the peripheral length of a bottom closure member which is to be employed to form the bottom of said container, said first edge portion having a fold line extending across said wall member substantially parallel to said first edge and spaced a first distance therefrom, a plurality of spaced-apart notches extending from said first edge to said fold line thereby forming tabs between said notches, and a plurality of spaced-apart cuts formed on said first edge portion with a middle portion of each said cut being spaced from said fold line a second distance toward said second edge of said wall member, said spaced-apart cuts each being of arcuate configuration with said middle portion of each cut being closer to said fold line than the ends of the respective cut, each said tab being provided with means for sealing a middle portion thereof to another surface of said wall member, said first distance being at least substantially equal to the difference between said second distance and the thickness of said bottom closure member which is to be employed to form the bottom of said container.

Claim 12

A paperboard blank, as set forth in claim 9, wherein said notches comprise first notches and second notches of different configuration with adjacent first notches being separated by intervening second notches.

Claim 13

A paperboard blank, as set forth in claim 9, wherein the distance from the fold line to the first edge of the wall member is substantially equal to the difference between the distance from the fold line to the portions of the cuts nearest said fold line less the thickness of the bottom closure member to be used in conjunction with said blank to form a container.

Claim 14

A paperboard blank, as set forth in claim 9, wHerein said means for sealing comprises an adhesive coating on said middle portion of each said tab.

Claim 15

A paperboard blank, as set forth in claim 9, wherein said means for sealing comprises a heat sealable thermoplastic resin coating on said middle portion of each said tab.

Claim 16

A paperboard blank, as set forth in claim 9, wherein each end of each said cut is spaced a common distance from said fold line.

Claim 17

A paperboard blank, as set forth in claim 14, wherein said cuts are of arcuate configuration with the middle portion of each cut being closer than the ends of said cut to said fold line.

Claim 18

Paperboard blanks for forming a continuously curved sidewall of a container, comprising: a generally rectangular wall member having first and second overlap end portions, first and second edge portions, and first and second edges, said first edge portion having a fold line extending across said wall member substantially parallel to said first edge and spaced a first distance therefrom, a plurality of spaced-apart notches extending from said first edge to said fold line thereby forming tabs between said notches, and a plurality of spaced-apart cuts formed on said first edge portion with a middle portion of each said cut being spaced from said fold line a second distance toward said second edge of said wall member, said spaced-apart cuts each being of arcuate configuration with said middle portion of each cut being closer to said fold line than the ends of the respective cut, said first distance being at least substantially equal to the difference between said second distance and the thickness of a bottom closure member which is to be employed to form the bottom of said container; and a bottom closure member having a peripheral length substantially equal to the length of said first edge of said wall member between said overlap end portions.

Claim 19

Paperboard blanks for forming a continuously curved sidewall of a container, comprising: a generally rectangular wall member having first and second overlap end portions, first and second edge portions, and first and second edges, said first edge portion having a fold line extending across said wall member substantially parallel to said first edge and spaced a first distance therefrom, a plurality of spaced-apart notches extending from said first edge to said fold line thereby forming tabs between said notches, and a plurality of spaced-apart cuts formed on said first edge portion with a middle portion of each said cut being spaced from said fold line a second distance toward said second edge of said wall member, said spaced-apart cuts each being of arcuate configuration with said middle portion of each cut being closer to said fold line than the ends of the respective cut, said first distance being at least substantially equal to the difference between said second distance and the thickness of a bottom closure member which is to be employed to form the bottom of said container; and a bottom closure member having a peripheral length substantially equal to the length of said first edge of said wall member between said overlap end portions.

Claim 20

Paperboard blanks in accordance with claim 16 wherein said bottom closure member is circular with said peripheral length forming a circumference of the circular closure member.