US4177746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a container
Assignee: Reynolds Metals Co
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Filing: 1978-09-21
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Granted: 1979-12-11
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Expires: 1998-09-21
Abstract
Abstract The side wall of a container is joined to the bottom portion thereof by a first frustoconical portion and a first semi-torroidal portion which, in turn, is joined to a second semi-torroidal portion; and, a bottom closing portion. In one embodiment the second semi-torroidal portion is joined to the bottom closing portion by a second frustoconical portion; a third semi-torroidal portion; and, a third frustoconical portion. In another embodiment the bottom closing portion is substantially flat but adapted to be domed outwardly under pressure and "cricket" inwardly when pressure is relieved.
Inventors
- 👤 Harry W. Lee, Jr.
- 👤 Joseph W. Wallace
- 👤 James M. Woolard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:26
CPC Classifications
B; B21; B21D; B21D51/00; B21D51/16; B21D51/26; B21D22/00; B21D22/20; B21D22/30; B65; B65D; B65D1/00; B65D1/12; B65D1/14; B65D1/16; B65D1/165
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
90 words
In a method of making a container having a cylindrical side wall and a bottom-closing portion closing one end thereof, the improvement comprising forming a frustoconical portion having one thereof directly attached to said side wall, forming a first semi-torroidal portion having one end thereof directly attached to the other end of said frustoconical portion, forming a second semi-torroidal portion having one end thereof directly attached to the other end of said first semi-torroidal portion and directly attaching the other end of said second semi-torroidal portion to said bottom-closing portion.
Claim 2
Dependent Claim
90 words
In a method of making a container having a cylindrical side wall and a bottom-closing portion closing one end thereof, the improvement comprising forming a frustoconical portion having one thereof directly attached to said side wall, forming a first semi-torroidal portion having one end thereof directly attached to the other end of said frustoconical portion, forming a second semi-torroidal portion having one end thereof directly attached to the other end of said first semi-torroidal portion and directly attaching the other end of said second semi-torroidal portion to said bottom-closing portion.
Claim 3
Dependent Claim
16 words
The method of claim 1 further comprising coining at least a portion of said bottom-closing portion.
Claim 4
Dependent Claim
24 words
The method of claim 2 wherein said bottom-closing portion includes a third semi-torroidal portion and said coining is applied to said third semi-torroidal portion.
Claim 5
Dependent Claim
12 words
The method of claim 2 further comprising doming said bottom-closing portion inwardly.
Claim 6
Dependent Claim
18 words
The method of claim 4 wherein said bottom-closing portion is domed inwardly between about 0.005 and 0.050 inch.
Claim 7
Dependent Claim
29 words
The method of claim 4 wherein the ratio of the diameter of said container to the depth of the inwardly domed bottom-closing portion is between about 40 and 500.
References Cited (Backward Citations)
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Cited
US3693828A
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US3905507A
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US3979009A
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US4134354A
Cited
US4065951A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-10 | 1983-06-11 | 1983-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-10 | 1987-06-11 | 1987-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-10 | 1991-06-11 | 1991-12-11 | $7700.00 | Window Closed / Lapsed |