Patent US4720038A successfully refreshed from Google Patents.
US4720038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corner structure
Assignee: Continental Forest Industries Inc
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Filing: 1982-09-20
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Granted: 1988-01-19
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Expires: 2002-09-20
Abstract
Abstract This relates to a fibre drum construction and more particularly to the reinforcement of the chime which is utilized to shape an end part of a fibre drum body to receive and tightly clamp in sealed relation the periphery of the drum wall. The end part of a conventional chime includes a plurality of flanges arranged to define a radially inwardly directed channel with the lowermost flange terminating in a curl. The endmost flange, which is annular, is provided with radiating ribs which project axially inwardly into the overlying portion of the drum body and serve to rigidify the channel. The ribs extend vertically into a vertical flange of the flanges and terminate generally within the curl, with the ribs extending entirely across the end flange.
Inventors
- 👤 John K. Shepard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:44
CPC Classifications
B; B65; B65D; B65D3/00; B65D3/10; B65D3/12; B65D3/14
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
80 words
In a drum of the type including a tubular body, an end wall and a corner reinforcement in the form of a metal chime, said chime having a corner portion including an annular end flange and a cylindrical upstanding flange; the improvement residing in upstanding ribs extending transversely across said annular end flange towards the interior of said drum, said ribs extending beyond said annular flange into said cylindrical flange with each of said ribs being generally of an L-shape.
Claim 2
Dependent Claim
80 words
In a drum of the type including a tubular body, an end wall and a corner reinforcement in the form of a metal chime, said chime having a corner portion including an annular end flange and a cylindrical upstanding flange; the improvement residing in upstanding ribs extending transversely across said annular end flange towards the interior of said drum, said ribs extending beyond said annular flange into said cylindrical flange with each of said ribs being generally of an L-shape.
Claim 3
Dependent Claim
18 words
In a drum according to claim 1 wherein said drum is cylindrical and said ribs extend radially inwardly.
Claim 4
Dependent Claim
16 words
In a drum assembly according to claim 1 wherein said ribs terminate in said cylindrical flange.
Claim 5
Dependent Claim
24 words
In a drum assembly according to claim 1 wherein said ribs terminate in said cylindrical flange generally in the plane of said end wall.
Claim 6
Dependent Claim
22 words
In a drum according to claim 1 wherein said end wall is selectively a top end wall or a bottom end wall.
Claim 7
Dependent Claim
123 words
In a drum of the type including a tubular body, an end wall and a corner reinforcement in the form of a metal chime, said chime having a corner portion including an annular end flange and a cylindrical upstanding flange; the improvement residing in upstanding ribs extending transversely across said annular end flange towards the interior of said drum, said chime having an end portion in the form of a generally radially inwardly opening channel of which said chime corner portion is a part, said body having an end part whithin said chime channel, said drum end part also being channel shaped and including spaced legs, and said end wall having a peripheral portion clamped betwen said drum body legs by said chime.
Claim 8
Dependent Claim
123 words
In a drum of the type including a tubular body, an end wall and a corner reinforcement in the form of a metal chime, said chime having a corner portion including an annular end flange and a cylindrical upstanding flange; the improvement residing in upstanding ribs extending transversely across said annular end flange towards the interior of said drum, said chime having an end portion in the form of a generally radially inwardly opening channel of which said chime corner portion is a part, said body having an end part whithin said chime channel, said drum end part also being channel shaped and including spaced legs, and said end wall having a peripheral portion clamped betwen said drum body legs by said chime.
Claim 9
Dependent Claim
36 words
In a drum assembly according to claim 6 wherein said annular end flange terminates in a reversely turned curl having a free end portion positioned between one of said body end legs and said end wall.
Claim 10
Dependent Claim
43 words
In a drum assembly according to claim 6 wherein said annular bottom flange terminates in a reversely turned curl having a free end portion positioned between one of said body end legs and said bottom wall, and said ribs extend into said curl.
Claim 11
Dependent Claim
29 words
In a drum according to claim 8 wherein said ribs extend beyond said annular flange into said cylindrical flange with each of said ribs being generally of an L-shape.
References Cited (Backward Citations)
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Cited
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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) | 1991-01-18 | 1991-07-20 | 1992-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-18 | 1995-07-20 | 1996-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-18 | 1999-07-20 | 2000-01-19 | $7700.00 | Window Closed / Lapsed |