US4078693A — Tear-open can lid with push-in tab

Claim 1

Independent Claim 221 words

In a tear-open crowned can lid having a convex top face and a tab embossed in and forming an upwardly offset, raised region in the lid, the improvement wherein: said tab has a narrow elongated segment extending transversely inward away from the circumferential edge of the lid and having a width not greater than substantially 0.160 inch, and said narrow elongated segment terminating in a reduced-width segment at its inner end, and said lid has a score line indented in the bottom which extends from the inner end of said tab continuously along the opposite sides of said narrow elongated segment of the tab to termination points which are spaced apart circumferentially of the lid along the outer edge of the tab, whereby to leave an unscored permanent connection between the outer edge of the tab and the remainder of the lid, whereby, upon pressing down on said narrow elongated segment, the lid snaps in at the center and the tab tears free from the remainder of the lid first at its inner end and then progressively outward along said score line on opposite sides of said narrow elongated segment to said termination points to provide a pour opening inward from said unscored permanent connection between the tab and the remainder of the lid at the outer edge of the tab.

Claim 2

Dependent Claim 221 words

In a tear-open crowned can lid having a convex top face and a tab embossed in and forming an upwardly offset, raised region in the lid, the improvement wherein: said tab has a narrow elongated segment extending transversely inward away from the circumferential edge of the lid and having a width not greater than substantially 0.160 inch, and said narrow elongated segment terminating in a reduced-width segment at its inner end, and said lid has a score line indented in the bottom which extends from the inner end of said tab continuously along the opposite sides of said narrow elongated segment of the tab to termination points which are spaced apart circumferentially of the lid along the outer edge of the tab, whereby to leave an unscored permanent connection between the outer edge of the tab and the remainder of the lid, whereby, upon pressing down on said narrow elongated segment, the lid snaps in at the center and the tab tears free from the remainder of the lid first at its inner end and then progressively outward along said score line on opposite sides of said narrow elongated segment to said termination points to provide a pour opening inward from said unscored permanent connection between the tab and the remainder of the lid at the outer edge of the tab.

Claim 3

Dependent Claim 48 words

A can lid according to claim 1, wherein said narrow elongated tab segment extends substantially radially of the lid, and its inner end is on the opposite side of the center of the lid from said unscored permanent connection of the tab to the remainder of the lid.

Claim 4

Dependent Claim 74 words

A can lid according to claim 1, wherein the lid has an outer score line idented into the bottom in close proximity to said first-mentioned score line along the latter's length for causing the lid to bend down about said outer score line into a convex curvature in a narrow edge region of the lid next to the torn edge at said first-mentioned score line when said elongated narrow tab segment is pushed in.

Claim 5

Dependent Claim 33 words

A can lid according to claim 3, wherein said narrow elongated tab segment extends substantially radially of the lid, and at its inner end is located close to the center of the lid.

Claim 6

Dependent Claim 43 words

A can lid according to claim 4, wherein said reduced-width segment at the inner end of the tab extends to the opposite side of the center of the lid from said unscored permanent connection of the tab to the remainder of the lid.

Claim 7

Dependent Claim 78 words

A can lid according to claim 5, wherein said tab also has a circumferentially enlarged segment at its outer end which is connected integrally to said narrow elongated segment at the latter's outer end, and said score line termination points are on the opposite sides of said circumferentially enlarged outer end segment, whereby said unscored permanent connection between the tab and the remainder of the lid extends along the outer edge of said circumferentially enlarged outer end segment.

Claim 8

Dependent Claim 32 words

A can lid according to claim 6, wherein said circumferentially enlarged outer end segment has an appreciable extent transversely inward from its outer edge to its connection to said narrow elongated segment.

Claim 9

Dependent Claim 34 words

A can lid according to claim 5, wherein said narrow elongated segment constitutes substantially the entire tab and has its outer end joined to the remainder of the tab at said unscored permanent connection.

Claim 10

Dependent Claim 35 words

A can lid according to claim 8, wherein said narrow elongated tab segment is of substantially uniform circumferential width throughout its radial length except in the vicinity of said reduced-width segment at its inner end.

Claim 11

Dependent Claim 56 words

A can lid according to claim 8, wherein the opposite sides of said narrow elongated tab segment taper away from each other for a portion of its length outward from said point and then taper toward each other for the remainder of its length outward to said unscored permanent connection to the remainder of the lid.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1981-03-13	1981-09-12	1982-03-14	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1985-03-13	1985-09-12	1986-03-14	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1989-03-13	1989-09-12	1990-03-14	$7700.00	Window Closed / Lapsed

Tear-open can lid with push-in tab

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