Can lid

Patent metadata

Field	Value
Publication number	US-11560255-B2
Application number	US-201917044556-A
Country	US
Kind code	B2
Filing date	Apr 3, 2019
Priority date	Apr 3, 2018
Publication date	Jan 24, 2023
Grant date	Jan 24, 2023

Abstract

In an easy open can lid a pulling-up direction of a tab acts toward a center of the lid while securing a finger hooking property with respect to the tab, by devising a shape of an embossed portion. In a can lid in which a tab for score breaking is fixed to a main body, and an embossed portion, into which a fingertip is insertable, is provided in the vicinity of a rear end of a finger hook portion of the tab, the embossed portion has a slope formed at a rear end side of the finger hook portion, and the slope of the embossed portion is provided with a guide recess for guiding a fingertip that extends toward the center of the lid at least up to a position thereof facing a central portion in a width direction of a back surface of the finger hook portion.

First claim

The invention claimed is:

1. A can lid in which a tab for score breaking is fixed to a can lid main body, and an embossed portion, into which a fingertip is insertable, is provided in the vicinity of a rear end of a finger hook portion of the tab,
wherein the embossed portion has a bottom surface and an inner peripheral wall surrounding the bottom surface; the inner peripheral wall has a first slope at a side opposite to the center of a can lid, a second slope at a central side of the can lid, and a pair of side slopes connecting to opposite ends of the first slope and the second slope,
wherein when assuming a center line that passes through the center of the can lid and a center of the finger hook portion, the second slope is recessed in a valley shape having a portion thereof along a center line as a valley bottom,
wherein the second slope extends toward a center of the can lid at least up to a position facing a back surface of the finger hook portion,
wherein the can lid main body is provided with convex portions in the vicinity of a rear end of the finger hook portion of the tab at opposite sides of the embossed portion that is sandwiched therebetween,
wherein the can lid main body has a circular center panel, which has a first panel surface at an outer peripheral edge side thereof and a second panel surface at an inner side of the first panel surface, the second panel surface being lower by one step than an inner peripheral edge of the first panel surface via a stepped portion, and the convex portions are provided on the first panel surface,
wherein the planar shape of the root portion of each convex portion is a rounded triangular shape with three sides bulged outward, the middle portion thereof gradually transitions to a circular shape toward the apex thereof,
wherein the top of each convex portion is displaced toward a detour portion side of the stepped portion so that it is arranged close to a corner portion of the tab,
wherein the slope regions facing the corner portions of the tab are respectively located in the detour portions of the stepped portion, and
wherein the detour portions are respectively continuous with the slope regions of the convex portions to constitute parts of the slopes of the convex portions and the detour portions spreading to the second panel surface side protrude so as to overlap the back surface side of the corner portions of the tab.

2. The can lid according to claim 1 , wherein a width of the second slope in a direction orthogonal to the center line is gradually narrowed toward a central direction of the can lid.

3. The can lid according to claim 2 , wherein the pair of side slopes are inclined in a direction gradually approaching toward the can lid center side.

4. The can lid according to claim 3 , wherein the convex portions have slopes at the side of the embossed portion, the slopes comprising inclined surfaces continuous with the side slopes of the embossed portion.

5. The can lid according to claim 1 , wherein the second slope comprises an inclined surface that gradually becomes shallower from a bottom surface of the embossed portion toward the center of the can lid, and the inclined surface has an angle of inclination smaller than that of the first slope.

6. The can lid according to claim 1 , wherein each of the convex portions has a height in a range of 0.5 mm or more and 1.2 mm or less.

7. The can lid according to claim 1 , wherein a distance between apexes of the convex portions is in a range of 13 mm±2 mm.

8. The can lid according to claim 1 , wherein the second slope comprises a central region along the center line and transition regions connected to the side slopes, and wherein the angle of inclination of the second slope along the center line is a constant gentle angle smaller than the angle of inclination of the first slope from the bottom surface to the predetermined height, and then gradually becomes more gentle in a region in facing a back surface of the finger hook portion.

9. The can lid according to claim 8 , wherein the bottom surface includes a first side at the opposite side from the panel center, a second side at the panel center side, and a pair of lateral sides connecting between the opposite ends of the first side and the opposite ends of the second side, and wherein a region of the second slope sandwiched by imaginary lines passing through the opposite ends of the second side is defined as the central region.

10. The can lid according to claim 1 , wherein the outline shape of the embossed portion is a sector shape in which the outer peripheral edge of the first slope is an arc of a fan and the tip of the second slope is the center of the fan, and the pair of side slopes are inclined toward the center of a can lid so as to gradually approach each other with respect to the center line.

11. The can lid according to claim 1 , wherein the first slope and the side slopes have upper ends continuing to the first panel surface and the second slope has an upper end continuing to the second panel surface, and wherein the stepped portion is branched from the side slopes to detour the convex portions at positions of transition from the side slopes to the second slope, and the stepped portion has a pair of detour portions that are each continuous with a slope region at a side of each convex portions facing the tab, thereby constituting a part of a slope of each convex portions, and a lower portion of each side slope is connected to the second slope.

Assignees

• Toyo Seikan Co Ltd

Inventors

• Oki Takahiro
• Kominami Atsushi
• Isomura Ryotaro

Classifications

• B65D2517/0079

  located beneath tab hand grip to facilitate initial lifting · CPC title

• B65D17/34 Primary

  Arrangement or construction of pull or lift tabs (B65D17/32 takes precedence) · CPC title

• B65D17/4012

  for opening partially by means of a tearing tab · CPC title

• B65D2517/0013

  pull-out tear panel, e.g. by means of a tear-tab · CPC title

• B65D2517/0014

  pivot tab and push-down tear panel · CPC title