Patent US3454290A successfully refreshed from Google Patents.
US4281979A
Expired / Lapsed
US
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Apparatus to form a flat-topped rim on a thin-walled foam plastic container
Assignee: Graham Packaging Plastic Products Inc
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Filing: 1979-10-26
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Granted: 1981-08-04
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Expires: 1999-10-26
Abstract
Abstract Apparatus for forming the rim on a foam plastic container such as a cup by use of a segmented rim former. The cavity in the rim former is contoured so as to produce a curled rim that is flat on the top. The flat top of the rim is parallel to the bottom of the cup. The apparatus comprises a segmented rim former with a combination of linear and curved surfaces that form a noncircular container rim.
Inventors
- 👤 Thomas E. Doherty
- 👤 William F. Herzog
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:49
CPC Classifications
B; B29; B29C; B29C57/00; B29C57/12; Y; Y10; Y10S; Y10S264/00; Y10S264/71
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
122 words
An apparatus for forming a flat-topped rim on a thin-walled container comprising a die cavity of toroidal configuration formed of an internal die section to which is attached a plurality of external die segments, an ingress for the insertion of a container top edge into said die cavity, said cavity when viewed in cross section being defined by an incoming first linear section for the guidance of the container top edge, a first arcuate section connected to said first linear section, a second linear section connected to said first arcuate section, a second arcuate section connected to said second linear section, a third linear section connected to said second arcuate section and a third arcuate section connected to said third linear section.
Claim 2
Independent Claim
122 words
An apparatus for forming a flat-topped rim on a thin-walled container comprising a die cavity of toroidal configuration formed of an internal die section to which is attached a plurality of external die segments, an ingress for the insertion of a container top edge into said die cavity, said cavity when viewed in cross section being defined by an incoming first linear section for the guidance of the container top edge, a first arcuate section connected to said first linear section, a second linear section connected to said first arcuate section, a second arcuate section connected to said second linear section, a third linear section connected to said second arcuate section and a third arcuate section connected to said third linear section.
Claim 3
Dependent Claim
17 words
An apparatus as claimed in claim 1 wherein each of said arcuate sections is defined by radii.
Claim 4
Dependent Claim
25 words
An apparatus as claimed in claim 2 wherein the radius of said first arcuate section is larger than the radius of said second arcuate section.
Claim 5
Dependent Claim
18 words
An apparatus as claimed in claim 2 wherein said third arcuate section is defined by two different radii.
Claim 6
Dependent Claim
19 words
An apparatus as claimed in claim 4 wherein the smaller of said radii is adjacent said third linear section.
Claim 7
Dependent Claim
23 words
An apparatus as claimed in claim 5 wherein the radius of said first arcuate section is less than either of said different radii.
Claim 8
Dependent Claim
21 words
An apparatus as claimed in claim 5 wherein said third linear section is common to both said internal and external dies.
Claim 9
Dependent Claim
31 words
An apparatus as claimed in claim 5 wherein said second linear section is tapered with respect to a horizontal plane that is perpendicular to the longitudinal axis of said toroidal configuration.
Claim 10
Dependent Claim
20 words
An apparatus as claimed in claim 8 wherein the taper of said second linear section is at least three degrees.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-03 | 1985-02-02 | 1985-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-03 | 1989-02-02 | 1989-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-03 | 1993-02-02 | 1993-08-04 | $7700.00 | Window Closed / Lapsed |