US 4,347,934 A · Corrugated container

Abstract

A lightweight container having a readily removable corrugated sidewall. The inner ply of the sidewall is a corrugated sheet having a selected length and width. A bottom wall member is positioned adjacent the lower axial edge of the inner sheet. A flat outer sheet, of selected length and a width greater than the width of the corrugated inner sheet, is joined to the inner sheet to define the outer ply of the sidewall. The outer sheet projects beyond the lower edge of the inner sheet and is folded against and secured to the bottom wall member, to thereby restrain movement of the bottom wall member. A frangible joint is defined along which the sidewall can be severed from the bottom wall without severing the corrugated inner wall, so that the inner wall adds rigidity without interfering with the ready removal of the sidewall. In the preferred arrangement, the adjacent ends of the inner sheet are in a substantially abutting and unsealed relationship to assist in the opening of the container. A portion of the outer sheet also forms pull-tab means which facilitates the removal of the sidewall from the bottom wall. Further, in the preferred embodiment, the engaged portions of the sheets and bottom wall member are coated with a heat sensitive coating which is self-adhering upon the application of heat in a selected temperature.

Claims12

Dependent claims

A tubular container having a readily removable corrugated side wall comprising:

a corrugated inner sheet having a selected length and width and formed with the lateral ends of said inner sheet that define said length being adjacent each other to define a corrugated tubular inner ply of said container side wall;
a bottom wall member engaged with the lower edge of said corrugated inner sheet and shaped to form the bottom of said container;
a flat outer sheet having a selected length defined by lateral ends and a width defined by axially opposite edges which is greater than the width of the corrugated inner sheet, said outer sheet joined to said corrugated inner sheet to define a tubular outer ply of said side wall, with the lateral ends of said outer sheet adjacent each other and with a portion of said outer sheet projecting beyond said lower edge of said corrugated inner sheet and folded against and secured to said bottom wall member so that said inner sheet and outer sheet cooperate to restrain upward or downward movement, respectively, of said bottom wall member;
said outer sheet and said bottom wall member defining a frangible joint along which said side wall can be severed from said bottom wall without severing said corrugated inner wall, so that the corrugated inner wall adds rigidity to said package without interfering with the ready removal of the side wall from the bottom wall;
and
the adjacent lateral ends of said inner sheet being unsealed to one another across said inner sheet which facilitates said removal of said side wall.

3 more elements

A tubular container having a readily removable and moisture-resistant corrugated side wall comprising:

a corrugated inner sheet having a selected length and width and formed with the lateral ends of said inner sheet that define said length being adjacent each other to define a corrugated tubular inner ply of the container side wall, with said inner sheet having a moisture-resistant inner coating having a first selected melting point range and a heat-sensitive outer coating having a second selected melting point range below said first melting point range;
a bottom wall member engaged with the lower edge of said corrugated inner sheet and shaped to form the bottom wall member of said container, with at least the periphery of the outer surface of said bottom wall member including a heat-sensitive coating having said second melting point range;
a flat outer sheet having a selected length defined by lateral ends and a width defined by axially opposite edges which is greater than the width of said corrugated inner sheet to define a tubular outer ply of the container side wall, with the lateral ends of said outer sheet adjacent each other and with the inner surface of said outer sheet having a heat-sensitive coating having said second melting point range and sealed to said heat-sensitive coating of said corrugated inner sheet and with a portion of said outer sheet projecting beyond said lower edge of said corrugated inner sheet and folded against and sealed to the heat-sensitive coating of said bottom wall member, so that the inner and outer sheets restrain movement of said bottom wall member, and said bottom wall and said outer sheet cooperate to define a frangible joint along which said side wall can be severed from said bottom wall without severing the corrugated inner sheet, so that the corrugated inner wall adds rigidity to said package without interfering with the ready removal of said side wall and the adjacent lateral ends of said inner sheet being unsealed to one another across said inner sheet which facilitates said removal of said side wall.

Dependencies are inferred from the claim text.

Corrugated container

Life of this patent

Corrugated container

Life of this patent

Abstract

Claims12