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US3580468A Expired / Lapsed US ⏱️ 0.0 years remaining

Nestable double-walled disposable container

Assignee: Continental Can Co Inc
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Filing: 1969-08-05
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Granted: 1971-05-25
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Expires: 1989-08-05
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Abstract

Abstract Composite frustoconical nestable, double-walled, disposable (i.e. inexpensive) containers (cups in the smaller sizes, tubs in the larger sizes) are formed by combining conventional outer paper cups and inner liner cups formed of thin-walled thermoformed seamless plastic. The outer paper cups have plain or straight (i.e. uninterrupted) sidewalls from top to bottom with outwardly curled rims or lips at the top and recessed bottoms resulting in a continuous rim at the bottom of each cup. The plastic inner liner cups also have frustoconical sidewalls which are somewhat smaller than the sidewalls of the outer paper cups so as to leave in each cup a space between the interfitting sidewalls. Each inner liner has a rim or lip at the top which is curled over, around and under the rim of the outer paper cup so as to snugly embrace the same. A short distance below the rim each plastic inner liner has a continuous, inwardly opening, circumferential lid-receiving groove, the outer periphery of which engages the surrounding inner surface of the sidewall of the outer paper cup so as to act as a spacer between the sidewalls. Adjacent the bottom of each inner liner cup there is a series of circumferentially spaced stacking indentations integrally formed partially in the lower sidewall and partially in the bottom of the liner cup. The segments of the sidewall intermediate the stacking indentations flare outwardly in respect to the frustoconical sidewall so as to join the liner bottom in circumferentially spaced arcuate corners which rest and engage in the continuous circumferential inner corner formed between the bottom and sidewall of the outer paper cup. The stacking indentations have generally horizontal top shelves or shoulders which are engaged by the bottom rims of the outer paper cups when the composite containers are in nested condition.

Inventors

  • 👤 James A Mcdevitt

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 13:53
CPC Classifications
B; B65; B65D; B65D1/00; B65D1/22; B65D1/26; B65D1/265

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 165 words
A nestable double-walled container comprising an outer paper cup of frustoconical configuration having a plain uninterrupted sidewall with an outwardly rolled bead defining the top rim and having the bottom spaced above a lower rim, and a thin-walled thermoformed seamless plastic inner liner cup of frustoconical configuration the sidewall of which has (1) a top rim in the form of a bead snugly embracing said bead of said outer paper cup, (2) an inwardly opening circumferential lid-receiving groove spaced below said top rim with the outer periphery of said groove engaging the inner surface of said outer paper cup and thereby serving as a spacer between the upper sidewall portions of said outer cup and inner liner cup, and (3) stacking means integrally formed adjacent the bottom of said inner liner cup with at least portions of the bottom periphery of said inner liner cup engaging and resting in the continuous circumferential inner corner formed between said bottom and sidewall of said outer paper cup.
Claim 2
Dependent Claim 165 words
A nestable double-walled container comprising an outer paper cup of frustoconical configuration having a plain uninterrupted sidewall with an outwardly rolled bead defining the top rim and having the bottom spaced above a lower rim, and a thin-walled thermoformed seamless plastic inner liner cup of frustoconical configuration the sidewall of which has (1) a top rim in the form of a bead snugly embracing said bead of said outer paper cup, (2) an inwardly opening circumferential lid-receiving groove spaced below said top rim with the outer periphery of said groove engaging the inner surface of said outer paper cup and thereby serving as a spacer between the upper sidewall portions of said outer cup and inner liner cup, and (3) stacking means integrally formed adjacent the bottom of said inner liner cup with at least portions of the bottom periphery of said inner liner cup engaging and resting in the continuous circumferential inner corner formed between said bottom and sidewall of said outer paper cup.
Claim 3
Dependent Claim 31 words
The nestable double-walled container of claim 1 wherein the the central portion of the bottom of said plastic inner liner cup is spaced above the bottom of said outer paper cup.
Claim 4
Dependent Claim 54 words
The nestable double-walled container of claim 2 wherein the bottom of said plastic inner liner cup has an annular margin and a center button which engage the bottom of said outer paper cup and serve to separate said central portion of said inner liner cup bottom from the bottom of said outer paper cup.
Claim 5
Dependent Claim 251 words
A nestable double-walled container comprising an outer paper cup of frustoconical configuration having a plain uninterrupted sidewall with an outwardly rolled bead defining the top rim and having the bottom spaced above a lower rim, and a thin-walled thermoformed seamless plastic inner liner cup of frustoconical configuration the sidewall of which has (1) a top rim in the form of a bead snugly embracing said bead of said outer paper cup, (2) an inwardly opening circumferential lid-receiving groove spaced below said top rim with the outer periphery of said groove engaging the inner surface of said outer paper cup and thereby serving as a spacer between the upper sidewall portions of said outer cup and inner liner cup, and (3) a series of circumferentially spaced stacking indentions integrally formed at the bottom of the inner liner cup with each indention being partly formed in said sidewall and partly in the liner bottom with the segments of the sidewall intermediate said indentations being flared outwardly from the straight sidewall and joining said liner bottom in circumferentially spaced arcuate corners which rest on and engage in the continuous circumferential inner corner formed between said bottom of said outer paper cup and the sidewall thereof, the upper ends of said stacking formations serving as stacking abutments for the bottom rim of said outer paper cup and, the main portion of the sidewall of said inner liner cup which extends below said groove being spaced from the surrounding sidewall portion of said outer paper cup.
Claim 6
Dependent Claim 251 words
A nestable double-walled container comprising an outer paper cup of frustoconical configuration having a plain uninterrupted sidewall with an outwardly rolled bead defining the top rim and having the bottom spaced above a lower rim, and a thin-walled thermoformed seamless plastic inner liner cup of frustoconical configuration the sidewall of which has (1) a top rim in the form of a bead snugly embracing said bead of said outer paper cup, (2) an inwardly opening circumferential lid-receiving groove spaced below said top rim with the outer periphery of said groove engaging the inner surface of said outer paper cup and thereby serving as a spacer between the upper sidewall portions of said outer cup and inner liner cup, and (3) a series of circumferentially spaced stacking indentions integrally formed at the bottom of the inner liner cup with each indention being partly formed in said sidewall and partly in the liner bottom with the segments of the sidewall intermediate said indentations being flared outwardly from the straight sidewall and joining said liner bottom in circumferentially spaced arcuate corners which rest on and engage in the continuous circumferential inner corner formed between said bottom of said outer paper cup and the sidewall thereof, the upper ends of said stacking formations serving as stacking abutments for the bottom rim of said outer paper cup and, the main portion of the sidewall of said inner liner cup which extends below said groove being spaced from the surrounding sidewall portion of said outer paper cup.
Claim 7
Dependent Claim 18 words
The nestable double-walled container of claim 4 wherein said upper ends of said stacking formations are substantially horizontal.

References Cited (Backward Citations)

US2695744A Cited
US3070275A Cited
US3097027A Cited
US3372830A Cited
US3456860A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1974-05-24 1974-11-23 1975-05-25 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-05-24 1978-11-23 1979-05-25 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-05-24 1982-11-23 1983-05-25 $7700.00 Window Closed / Lapsed

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