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US3773210A Expired / Lapsed US ⏱️ 0.0 years remaining

Opening tab for easy open container

Assignee: Individual
•
Filing: 1972-05-30
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Granted: 1973-11-20
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Expires: 1992-05-30
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Abstract

Abstract An opening tab for an easy open container having an attachment portion secured to a removable panel included in the central panel of an end closure, a fulcrum portion integrally connected to the attachment portion and having a fulcrum edge for fulcruming said opening tab against the central panel of the end closure spacially distant from the removable panel, and a lifting handle integrally connected to said fulcrum portion and forming a longitudinally rigid lever therewith. A reinforcing means is provided in the fulcrum portion extending into and interrupting the juncture between the fulcrum and attachment portions thereby preventing the formation of a sharp angle of bend at the juncture between the fulcrum and attachment portions during the fulcruming operation and also increasing the strength of the fulcrum portion during the fulcruming operation.

Inventors

  • 👤 C Radtke

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 11:41
CPC Classifications
B; B65; B65D; B65D17/00; B65D17/28; B65D17/401; B65D17/4012

Claims Analysis

Total Claims: 12
Claim 1
Independent Claim 153 words
An opening tab for removing the removable panel from the wall of an easy open container, said removable panel having a leading portion located substantially in the center of said wall, said opening tab comprising: an attachment portion secured to the leading portion of said removable panel; a fulcrum portion integrally connected to said attachment portion at a juncture, said fulcrum portion having a fulcrum surface for bearing against the wall of said container spacially distant from the leading portion of said removable panel; a lifting handle overlying said removable panel integrally connected to said fulcrum portion and forming a longitudinally rigid lever therewith extending from said fulcrum surface; and reinforcing means formed in said fulcrum portion extending into and interrupting the juncture between said fulcrum and attachment portions thereby to prevent the formation of a sharp angle of bend at said juncture betwEen said fulcrum and attachment portions during the fulcruming operation.
Claim 2
Dependent Claim 153 words
An opening tab for removing the removable panel from the wall of an easy open container, said removable panel having a leading portion located substantially in the center of said wall, said opening tab comprising: an attachment portion secured to the leading portion of said removable panel; a fulcrum portion integrally connected to said attachment portion at a juncture, said fulcrum portion having a fulcrum surface for bearing against the wall of said container spacially distant from the leading portion of said removable panel; a lifting handle overlying said removable panel integrally connected to said fulcrum portion and forming a longitudinally rigid lever therewith extending from said fulcrum surface; and reinforcing means formed in said fulcrum portion extending into and interrupting the juncture between said fulcrum and attachment portions thereby to prevent the formation of a sharp angle of bend at said juncture betwEen said fulcrum and attachment portions during the fulcruming operation.
Claim 3
Dependent Claim 28 words
The opening tab as defined in claim 1 wherein the juncture between said fulcrum and attachment portions includes a vincular segment integrally interconnecting said fulcrum and attachment portions.
Claim 4
Dependent Claim 28 words
The opening tab as defined in claim 1 wherein said reinforcing means extends substantially across said fulcrum portion thereby to reinforce said fulcrum portion during the fulcruming operation.
Claim 5
Dependent Claim 37 words
The opening tab as defined in claim 1 wherein said reinforcing means comprises a raised bead formed in said fulcrum portion and having a portion extending into and interrupting the juncture between said fulcrum and attachment portions.
Claim 6
Dependent Claim 19 words
The opening tab as defined in claim 4 wherein said raised bead has an arcuate shaped cross sectional configuration.
Claim 7
Dependent Claim 19 words
The opening tab as defined in claim 1 wherein said attachment portion is disposed lower than said fulcrum portion.
Claim 8
Dependent Claim 22 words
The opening tab as defined in claim 1 wherein said opening tab is formed from a relatively soft and malleable metallic material.
Claim 9
Dependent Claim 18 words
The opening tab as defined in claim 7 wherein said relatively soft and malleable metallic material is aluminum.
Claim 10
Dependent Claim 16 words
The opening tab as defined in claim 1 wherein said lifting handle includes a pull ring.
Claim 11
Dependent Claim 195 words
An opening tab formed of aluminum for removing the removable panel from the wall of an easy open container, said removable panel having a leading portion located substantially in the center of said wall, said opening tab comprising: a fulcrum portion having a fulcrum surface for bearing against the wall of said container spacially distant from the leading portion of said removable panel; an attachment portion secured to the leading portion of said removable panel and disposed lower than said fulcrum portion; a vincular segment integrally interconnecting said attachment and fulcrum portions at a juncture therebetween and sloping downwardly from said fulcrum portion to said attachment portion; a pull ring overlying said removable panel integrally connected to said fulcrum portion and forming a longitudinally rigid lever therewith extending from said fulcrum surface; and reinforcing means in the form of a raised bead formed in and substantially across said fulcrum portion, said raised bead having a portion extending into said vincular segment at the juncture between said attachment and fulcrum portions thereby to reinforce said fulcrum portions and to prevent the formation of a sharp angle of bend in said vincular segment during the fulcruming operation.
Claim 12
Dependent Claim 195 words
An opening tab formed of aluminum for removing the removable panel from the wall of an easy open container, said removable panel having a leading portion located substantially in the center of said wall, said opening tab comprising: a fulcrum portion having a fulcrum surface for bearing against the wall of said container spacially distant from the leading portion of said removable panel; an attachment portion secured to the leading portion of said removable panel and disposed lower than said fulcrum portion; a vincular segment integrally interconnecting said attachment and fulcrum portions at a juncture therebetween and sloping downwardly from said fulcrum portion to said attachment portion; a pull ring overlying said removable panel integrally connected to said fulcrum portion and forming a longitudinally rigid lever therewith extending from said fulcrum surface; and reinforcing means in the form of a raised bead formed in and substantially across said fulcrum portion, said raised bead having a portion extending into said vincular segment at the juncture between said attachment and fulcrum portions thereby to reinforce said fulcrum portions and to prevent the formation of a sharp angle of bend in said vincular segment during the fulcruming operation.

References Cited (Backward Citations)

US3627168A Cited
US3618816A Cited
US3720349A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-11-19 1977-05-21 1977-11-20 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-11-19 1981-05-21 1981-11-20 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-11-19 1985-05-21 1985-11-20 $7700.00 Window Closed / Lapsed

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