Patent US5246133A successfully refreshed from Google Patents.
US5246133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Injection molded lid with window
Assignee: Huhtamaki Inc
•
Filing: 1992-09-25
•
Granted: 1993-09-21
•
Expires: 2012-09-25
Abstract
Abstract The present invention includes an injection molded lid comprising a closed annular rim, a skirt fixed to and extending downwardly from the rim and a film sealed to the bottom side of the rim to cover the open space within the rim. The rim and skirt are molded as a single monolithic lid preform, with the skirt being fixed near the outer peripheral edge of the rim. The film is sealed along the inner peripheral edge on the bottom side of the rim. This device allows for a prospective consumer to view the contents of the container before purchasing it. In addition to the lid device, a method is provided of forming a closure to seal a food container. A lid preform is injection molded as a monolithic unit comprising a skirt and a closed rim. Then the film is sealed along the entire length of the inner peripheral edge on the bottom side of the rim. This method allows for forming a sturdy closure capable of maintaining the integrity of its original seal with the container as well as its seal with the film.
Inventors
- 👤 Thomas L. James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:52
CPC Classifications
B; B65; B65D; B65D25/00; B65D25/54; B65D43/00; B65D43/02; B65D43/0202; B65D43/0214; B65D43/0222; B65D2543/00; B65D2543/00009; B65D2543/00018; B65D2543/00064; B65D2543/00074; B65D2543/00092; B65D2543/00231; B65D2543/0024; B65D2543/00259; B65D2543/00296; B65D2543/00444; B65D2543/00481; B65D2543/0049; B65D2543/00527; B65D2543/00537
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
122 words
A lid adapted to seal a food container, said lid comprising: a closed rim presenting an inner peripheral edge and an outer peripheral edge and having top and bottom sides, said top side having a horizontally planar portion and said rim having at least one ridge portion projecting downward from said bottom side vertically opposed to the horizontally planar portion in proximity to, and spaced peripherally outward of, said inner peripheral edge; a skirt fixed to said rim in proximity to said outer peripheral edge and extending downward from said bottom side, said skirt having an inner side and an outer side; and a film scaled at least to said at least one ridge portion on said bottom side of said rim.
Claim 2
Dependent Claim
122 words
A lid adapted to seal a food container, said lid comprising: a closed rim presenting an inner peripheral edge and an outer peripheral edge and having top and bottom sides, said top side having a horizontally planar portion and said rim having at least one ridge portion projecting downward from said bottom side vertically opposed to the horizontally planar portion in proximity to, and spaced peripherally outward of, said inner peripheral edge; a skirt fixed to said rim in proximity to said outer peripheral edge and extending downward from said bottom side, said skirt having an inner side and an outer side; and a film scaled at least to said at least one ridge portion on said bottom side of said rim.
Claim 3
Dependent Claim
42 words
The lid of claim 1, wherein said rim, said skirt and said ridge portion are a monolithic plastic unit, and said film is sealed to said ridge portion by means of one of the group consisting of thermal bonding and ultrasonic bonding.
Claim 4
Dependent Claim
10 words
The lid of claim 1, wherein said rim is annular.
Claim 5
Dependent Claim
86 words
The lid of claim 1, wherein said rim further includes a flange which includes said planar portion and said flange having top and bottom sides and fixed to said inner peripheral edge of said rim, said flange having an inner peripheral edge and said at least one ridge portion extending downward from said flange at a position in proximity to, and spaced peripherally outward from, said inner peripheral edge of said flange, and said film being sealed at least to said at least one ridge portion.
Claim 6
Dependent Claim
28 words
A lid as in claim 1, wherein said at least one ridge portion comprises a continuous closed peripheral ridge substantially corresponding in shape to said inner peripheral edge.
Claim 7
Dependent Claim
40 words
A lid as in claim 5, wherein said rim, skirt, and ridge are a monolithic plastic unit, and said film is sealed to said ridge portion by means of one of the group consisting of thermal bonding and ultrasonic bonding.
Claim 8
Dependent Claim
19 words
A lid as in claim 5, wherein said at least one ridge portion comprises an additional closed peripheral ridge.
Claim 9
Dependent Claim
40 words
A lid as in claim 7, wherein said rim, skirt, and ridge are a monolithic plastic unit, and said film is sealed to said ridge portion by means of one of the group consisting of thermal bonding and ultrasonic bonding.
Claim 10
Dependent Claim
144 words
A lid adapted to seal a food container, said lid comprising: a closed rim presenting an inner peripheral edge and an outer peripheral edge and having top and bottom sides, said top side having a horizontally planar portion and said rim having at least one first and at least one second ridge portion projecting downward from said bottom side vertically opposed to the horizontally planar portion in proximity to said inner peripheral edge, said at least one first ridge portion being located peripherally outward with respect to said at least one second ridge portion; a skirt fixed to said rim in proximity to said outer peripheral edge and extending downward from said bottom side, said skirt having an inner side and an outer side; and a film sealed at least to said at least one ridge portion on said bottom side of said rim.
Claim 11
Dependent Claim
144 words
A lid adapted to seal a food container, said lid comprising: a closed rim presenting an inner peripheral edge and an outer peripheral edge and having top and bottom sides, said top side having a horizontally planar portion and said rim having at least one first and at least one second ridge portion projecting downward from said bottom side vertically opposed to the horizontally planar portion in proximity to said inner peripheral edge, said at least one first ridge portion being located peripherally outward with respect to said at least one second ridge portion; a skirt fixed to said rim in proximity to said outer peripheral edge and extending downward from said bottom side, said skirt having an inner side and an outer side; and a film sealed at least to said at least one ridge portion on said bottom side of said rim.
Claim 12
Dependent Claim
30 words
A lid as in claim 9, wherein each said at least one first ridge portion comprises a continuous closed peripheral ridge substantially corresponding in shape to said inner peripheral edge.
Claim 13
Dependent Claim
14 words
A lid as in claim 10, wherein said rim, skirt and ridge are annular.
References Cited (Backward Citations)
US3122990A
Cited
US1215114A
Cited
US1961137A
Cited
US2047951A
Cited
US1975703A
Cited
US2549917A
Cited
DE833462C
Cited
US3489307A
Cited
US4747499A
Cited
US4747500A
Cited
USD291971S
Cited
US4801029A
Cited
USD321477S
Cited
US5035341A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-09-20 | 1997-03-22 | 1997-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-09-20 | 2001-03-22 | 2001-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-09-20 | 2005-03-22 | 2005-09-21 | $7700.00 | Window Closed / Lapsed |