US3851789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Container fastening means
Assignee: Standard Oil Co
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Filing: 1973-02-21
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Granted: 1974-12-03
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Expires: 1993-02-21
Abstract
Abstract Deformable plastic containers, generally foamed, are widely used in the food service field where containers are filled at one location and transmitted to another location. These normally are either two-piece containers where a lid and base member snap together or one-piece having a hinged common border and a snap-in feature at the other end.
Inventors
- 👤 C Case
- 👤 D Hebert
- 👤 M Olson
- 👤 J Schubert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:02
CPC Classifications
B; B65; B65D; B65D43/00; B65D43/14; B65D43/16; B65D43/162; B65D2251/00; B65D2251/10; B65D2251/1016; B65D2251/1041
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
238 words
A container made of deformable plastic having first and second members, one of said members constituting the top of the container and the other the bottom thereof, each member being provided with a generally flat surface, one of said members having a sidewall attached to said flat surface which slopes away from said planer surface and a lip extending outwardly from the end of said sidewall, said lip being generally parallel to the flat surface of said member; the other of said members having a sidewall attached to the flat surface thereof adapted to engage frictionally the lip on the other of said members and having four sloping sections, the first sloping outwardly from the flat surface, the second sloping outwardly from the end of the first at an angle of 10* to 45* from the flat surface, the third sloping inwardly from the end of the second, and the fourth sloping outwardly from the end of the third, the apex of the angle between said second and third sections engaging the lip on said other member, said fourth cooperating with said lip to force said lip into position when said members are pushed together; said sidewalls extending substantially completely around said first and second members when these are separate pieces, and when said first and second members are hinged together along a contiguous section, at least the sidewalls opposite said contiguous section having the structure set forth.
Claim 2
Dependent Claim
238 words
A container made of deformable plastic having first and second members, one of said members constituting the top of the container and the other the bottom thereof, each member being provided with a generally flat surface, one of said members having a sidewall attached to said flat surface which slopes away from said planer surface and a lip extending outwardly from the end of said sidewall, said lip being generally parallel to the flat surface of said member; the other of said members having a sidewall attached to the flat surface thereof adapted to engage frictionally the lip on the other of said members and having four sloping sections, the first sloping outwardly from the flat surface, the second sloping outwardly from the end of the first at an angle of 10* to 45* from the flat surface, the third sloping inwardly from the end of the second, and the fourth sloping outwardly from the end of the third, the apex of the angle between said second and third sections engaging the lip on said other member, said fourth cooperating with said lip to force said lip into position when said members are pushed together; said sidewalls extending substantially completely around said first and second members when these are separate pieces, and when said first and second members are hinged together along a contiguous section, at least the sidewalls opposite said contiguous section having the structure set forth.
Claim 3
Dependent Claim
21 words
The container of claim 1 wherein the angle between said second sloping section and the flat surface is 20* to 30*.
Claim 4
Dependent Claim
162 words
A container made from a continuous sheet of deformable foamed plastic comprising first and second portions hinged together along a contiguous section, said first and second portions each including circumferential lips which abut when the container is closed, the first member also having, integral with the lip thereof, receiving means which includes a locking portion opposite the contiguous section, said locking portion including a reverse-tapered sidewall which provides means into which the lip of the seCond member is force fitted upon closure of the container wherein the improvement consists of: the portion of said circumferential lip of the first member which is integral with the second member receiving means which includes the locking portion opposite the contiguous section being sloped at a 10* to 45* slope away from the lip such that said portion of the lip of the second member which comes into contact with the reverse-tapered sidewall locking portion is free to pass below the abutting circumferential lips during closure.
Claim 5
Dependent Claim
162 words
A container made from a continuous sheet of deformable foamed plastic comprising first and second portions hinged together along a contiguous section, said first and second portions each including circumferential lips which abut when the container is closed, the first member also having, integral with the lip thereof, receiving means which includes a locking portion opposite the contiguous section, said locking portion including a reverse-tapered sidewall which provides means into which the lip of the seCond member is force fitted upon closure of the container wherein the improvement consists of: the portion of said circumferential lip of the first member which is integral with the second member receiving means which includes the locking portion opposite the contiguous section being sloped at a 10* to 45* slope away from the lip such that said portion of the lip of the second member which comes into contact with the reverse-tapered sidewall locking portion is free to pass below the abutting circumferential lips during closure.
Claim 6
Dependent Claim
13 words
The container of claim 3 wherein the slope is from 20* to 30*.
References Cited (Backward Citations)
US3633785A
Cited
US3794090A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |