US3724710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Container lid
Assignee: SWEETHEART PROPERTIES Inc
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Filing: 1970-11-05
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Granted: 1973-04-03
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Expires: 1990-11-05
Abstract
Abstract A plastic container lid is adapted for use in high speed automated packing techniques in which a number of lids are loaded in stacked configuration and are drawn from the bottom of the stack in succession to cap successively presented containers. The region of each lid which engages the next uppermost adjacent lid in the stack is provided with specially formed surfaces to communicate the region between the stacked lids with the atmosphere. This avoids any tendency for a plurality of lids to stick together when drawn from the stack.
Inventors
- 👤 P Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:48
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; B65D2543/00592; B65D2543/00712; B65D2543/00722; B65D2543/00731; B65D2543/00787; B65D2543/00796
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
181 words
A container lid comprising: a closure wall and an integral rim formed circumferentially thereabout, said rim being of generally U-shaped crosssectional configuration and defining a downwardly open circumferential channel designed to engage another identical lid stacked below; said rim comprising an inner wall, an outer wall, ending at a lower edge, a top wall, and a tapered intermediate stacking wall portion between said inner wall and top wall, said inner wall and outer wall being substantially equal in axial extent, means forming circumferentially spaced radially extending depressions in said intermediate wall portion and second means forming circumferentially spaced depressions at a juncture of said top wall and outer wall, to provide a passage across engaged rims of two stacked lids to the space between the closure walls of said adjacent stacked lids when said stacked lids are in contact with each other at a first set of points defined by said intermediate wall portion and at a second set of points defined by said juncture of said top wall and outer wall and spaced outwardly from said first set of points.
Claim 2
Dependent Claim
181 words
A container lid comprising: a closure wall and an integral rim formed circumferentially thereabout, said rim being of generally U-shaped crosssectional configuration and defining a downwardly open circumferential channel designed to engage another identical lid stacked below; said rim comprising an inner wall, an outer wall, ending at a lower edge, a top wall, and a tapered intermediate stacking wall portion between said inner wall and top wall, said inner wall and outer wall being substantially equal in axial extent, means forming circumferentially spaced radially extending depressions in said intermediate wall portion and second means forming circumferentially spaced depressions at a juncture of said top wall and outer wall, to provide a passage across engaged rims of two stacked lids to the space between the closure walls of said adjacent stacked lids when said stacked lids are in contact with each other at a first set of points defined by said intermediate wall portion and at a second set of points defined by said juncture of said top wall and outer wall and spaced outwardly from said first set of points.
Claim 3
Dependent Claim
24 words
A container lid in accordance with claim 1 wherein said second means comprise chordal flats at the juncture of said top and outer walls.
References Cited (Backward Citations)
US3240383A
Cited
US3589552A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |