Easy opening container wall

Claim 2

In an easy opening container having a sheet metal wall weakened along a line of scoring to form a tear strip with a tab attached to the tear strip for manual severance thereof, the improvement comprising: the sheet metal being thinned in a zone around the leading end of the tear strip, said zone being substantially wider than the line of scoring, with the line of scoring extending into said zone to provide a residual web of metal along the line of scoring of minimum thickness at the leading end of the tear strip to facilitate initial severance of the tear strip at the leading end thereof.

Claim 3

In an easy opening container having a sheet metal wall with a line of scoring forming a tear strip and having a tab attached to the tear strip for manual severance thereof, The improvement comprising: the sheet metal wall being formed into a hollow rivet in engagement with the tab; the sheet metal being indented from the same side as the rivet around the base of the rivet to form a continuous zone in which the sheet metal is reduced in thickness, the radial dimension of said zone being wider than the line of scoring; and the line of scoring extending into said zone to form the leading end of the tear strip and to provide a residual web of metal of minimum thickness to facilitate initial severance of the tear strip at the leading end thereof.

Claim 4

In an easy opening container having a sheet metal wall with a line of scoring forming a tear strip and having a tab attached to the tear strip for manual severance thereof, The improvement comprising: the sheet metal wall being formed into a hollow rivet in engagement with the tab; the sheet metal being indented from the same side as the rivet around the base of the rivet to form a continuous zone in which the sheet metal is reduced in thickness, the radial dimension of said zone being wider than the line of scoring; and the line of scoring extending into said zone to form the leading end of the tear strip and to provide a residual web of metal of minimum thickness to facilitate initial severance of the tear strip at the leading end thereof.

Claim 5

In an easy opening container having a sheet metal wall with a line of scoring forming a tear strip and having a tab attached to the tear strip for manual severance thereof, the improvement comprising: the sheet metal wall being formed into a hollow rivet in engagement with the tab; the sheet metal wall being indented around the base of the rivet from the side of the sheet metal opposite the side from which the hollow rivet extends, the indentation forming a continuous zone in which the sheet metal is reduced in thickness, the radial dimension of said zone being wider than the line of scoring; and the line of scoring extending into said zone to form the leading end of the tear strip and to provide a residual web of metal of minimum thickness to facilitate initial severance of the tear strip at the leading end thereof.

Claim 6

In an easy opening container having a sheet metal wall with a line of scoring forming a tear strip and having a tab attached to the tear strip for manual severance thereof, the improvement comprising: the sheet metal wall being formed into a hollow rivet in engagement with the tab; the sheet metal wall being indented around the base of the rivet from the side of the sheet metal opposite the side from which the hollow rivet extends, the indentation forming a continuous zone in which the sheet metal is reduced in thickness, the radial dimension of said zone being wider than the line of scoring; and the line of scoring extending into said zone to form the leading end of the tear strip and to provide a residual web of metal of minimum thickness to facilitate initial severance of the tear strip at the leading end thereof.

Claim 7

In an easy opening container having a tear strip with a tab attached thereto by a hollow rivet formed in the tear strip with the hollow rivet extending through an aperture in the tab and with a circumferential bead of the hollow rivet in overhanging engagement with the rim of the aperture, the improvement comprising: said tab being offset downward around the rivet to lower the rim of the aperture thereby to reduce the extent to which the hollow rivet protrudes from the plane of the tear strip.

Claim 8

In an easy opening container having a tear strip with a tab attached thereto by a hollow rivet formed in the tear strip with the hollow rivet extending through an aperture in the tab and with a circumferential bead of the hollow rivet in overhanging engagement with the rim of the aperture, the improvement comprising: said tab being offset downward around the rivet to lower the rim of the aperture thereby to reduce the extent to which the hollow rivet protrudes from the plane of the tear strip.

Claim 9

In a wall fabricated from sheet stock; means to accommodate an overlying member with an aperture therein; and a permanent connection between the member and the wall comprising an imperforate tubular rivet projecting from and integral with the wall and extending through the aperture in the member, said rivet having a peripheral wall and transverse head, the first mentioned wall being of reduced thickness surrounding the rivet and with material thereof being moved into said peripheral wall, said peripheral wall of the rivet being initially formed of material displaced solely from the material of the wall surrounding said rivet, and said head being supported out of the plane of the first mentioned wall by said material displacement forming said peripheral wall.

Claim 10

In a wall fabricated from sheet stock; means to accommodate an overlying member with an aperture therein; and a permanent connection between the member and the wall comprising an imperforate tubular rivet projecting from and integral with the wall and extending through the aperture in the member, said rivet having a peripheral wall and transverse head, the first mentioned wall being of reduced thickness surrounding the rivet and with material thereof being moved into said peripheral wall, said peripheral wall of the rivet being initially formed of material displaced solely from the material of the wall surrounding said rivet, and said head being supported out of the plane of the first mentioned wall by said material displacement forming said peripheral wall.

Claim 11

A device according to claim 5 wherein the transverse head is initially unworked and is radially extended from the peripheral and substantially unmoved rivet wall to overly and clampingly engage the rim of the aperture in said member.

Claim 12

A device according to claim 5 wherein the transverse head is initially unworked and is reduced in thickness and radially extended from the peripheral and substantially unmoved rivet wall to overly and clampingly engage the rim of the aperture in said member.

Claim 13

In a wall fabricated from sheet stock; a removable wall area; means to remove said wall area and comprising an overlying force applicating tab with an aperture therein; and a permanent connection between the tab and said wall area comprising an imperforated tubular rivet projecting and integral with the removable wall area and extending through the aperture in the tab, said rivet having a peripheral wall and a transverse head, the first mentioned wall being of reduced thickness surrounding the rivet and with material thereof being moved into said peripheral wall, said peripheral wall of the rivet being initially formed of material displaced solely from the material of the removable wall area surrounding said rivet, and said head being supported out of the plane of the first mentioned wall by said mAterial displacement forming said peripheral wall.

Claim 14

In a wall fabricated from sheet stock; a removable wall area; means to remove said wall area and comprising an overlying force applicating tab with an aperture therein; and a permanent connection between the tab and said wall area comprising an imperforated tubular rivet projecting and integral with the removable wall area and extending through the aperture in the tab, said rivet having a peripheral wall and a transverse head, the first mentioned wall being of reduced thickness surrounding the rivet and with material thereof being moved into said peripheral wall, said peripheral wall of the rivet being initially formed of material displaced solely from the material of the removable wall area surrounding said rivet, and said head being supported out of the plane of the first mentioned wall by said mAterial displacement forming said peripheral wall.