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US3722731A Expired / Lapsed US ⏱️ 0.0 years remaining

Inset coverall lid for containers

Assignee: Dow Chemical Co
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Filing: 1970-05-04
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Granted: 1973-03-27
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Expires: 1990-05-04
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Abstract

Abstract An improved thermoformed plastic inset coverall lid for use with a container for food products or the like. The lid includes inclined stacking bosses around its peripheral rim so as to prevent jamming. A locating ring about the top surface of the lid rim is employed to maintain the lids aligned in a free stack to maximize benefit of the stacking bosses.

Inventors

  • 👤 Cormick R Mc
  • 👤 C Fitzgerald

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-31 18:00
CPC Classifications
B; B65; B65D; B65D43/00; B65D43/02; B65D43/0202; B65D43/0204; B65D43/021; B65D2543/00; B65D2543/00009; B65D2543/00018; B65D2543/00027; B65D2543/00064; B65D2543/00074; B65D2543/00092; B65D2543/00259; B65D2543/00296; B65D2543/00444; B65D2543/00481; B65D2543/0049; B65D2543/00509; B65D2543/00537; B65D2543/00546; B65D2543/00555; B65D2543/00592; B65D2543/00601; B65D2543/00611; B65D2543/0062; B65D2543/00675; B65D2543/00685; B65D2543/00712; B65D2543/00722; B65D2543/00731; B65D2543/00787; B65D2543/00796

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 187 words
A snap-in thermoplastic lid for a container, said lid adaptable for coin feeding and comprising an annular base joined with a generally inverted U-shaped rim, said rim defined by generally vertically downwardly extending external and internal flanges of generally equal length traversed by a generally horizontal bight portion, said external flange including inclined stacking bosses located intermittently about its periphery, the degree of inclination of said stacking bosses from the generally vertical portion of said external flange being greater than the material thickness forming the external flange, a locating ring extending upwardly from the bight portion of the rim, a bead along the inside peripheral flange of the rim adjacent said annular base, and a generally horizontal leg extending outwardly from the bottom of said external flange a distance at least two times the material thickness of said flange to provide a more positive stack, said locating ring and bead cooperatively aligning a plurality of said lids stacked one on the other and whereby said horizontal leg prevents jamming of the lids even in the event said locating ring and bead fail to precisely align said lids.
Claim 2
Dependent Claim 187 words
A snap-in thermoplastic lid for a container, said lid adaptable for coin feeding and comprising an annular base joined with a generally inverted U-shaped rim, said rim defined by generally vertically downwardly extending external and internal flanges of generally equal length traversed by a generally horizontal bight portion, said external flange including inclined stacking bosses located intermittently about its periphery, the degree of inclination of said stacking bosses from the generally vertical portion of said external flange being greater than the material thickness forming the external flange, a locating ring extending upwardly from the bight portion of the rim, a bead along the inside peripheral flange of the rim adjacent said annular base, and a generally horizontal leg extending outwardly from the bottom of said external flange a distance at least two times the material thickness of said flange to provide a more positive stack, said locating ring and bead cooperatively aligning a plurality of said lids stacked one on the other and whereby said horizontal leg prevents jamming of the lids even in the event said locating ring and bead fail to precisely align said lids.
Claim 3
Dependent Claim 32 words
The lid of claim 1 wherein said stacking bosses extend outwardly from the top of the generally vertical portion of the external flange and then downwardly and inwardly to adjacent its bottom.
Claim 4
Dependent Claim 28 words
The lid of claim 1 wherein said stacking bosses extend inwardly and downwardly from the top of the generally vertical portIon of the external flange to its bottom.
Claim 5
Dependent Claim 50 words
The lid of claim 1, a plurality of other like lids wherein each of the lids is in nested relationship with the others in an aligned stack, the stacking bosses providing a greater horizontal contact between the feet of said external flanges and the horizontal ledges of the bight portions.
Claim 6
Dependent Claim 15 words
The lid of claim 1 wherein the same is thermoformed from high impact polystyrene resin.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-03-26 1976-09-25 1977-03-27 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-03-26 1980-09-25 1981-03-27 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-03-26 1984-09-25 1985-03-27 $7700.00 Window Closed / Lapsed

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