US3955705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic drum
Assignee: Greif Inc
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Filing: 1974-07-15
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Granted: 1976-05-11
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Expires: 1994-07-15
Abstract
Abstract An improved drum is provided comprising an elongated tubular body member formed of a plastic material. The drum further includes plastic top and bottom closures secured to opposite ends of the body member and including portions which extend respectively over the top and bottom ends of the body member. Metal chimes encircle the interfaces of both the top and bottom closures with the body member and secure the closures to the body member. Each chime is spirally wound inwardly about the interface through at least 360° of arc. An accordion-like member extends between the body member and bottom to allow for greater flexibility. The top and bottom closures are designed to enable stacking of the drum on another drum of similar construction.
Inventors
- 👤 Robert A Dubois
- 👤 Elmer J. Desher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:57
CPC Classifications
B; B65; B65D; B65D11/00; B65D11/02; B65D11/06; B65D11/20; B65D11/22; B65D11/24; B65D11/26
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
198 words
An essentially all plastic drum comprising: an elongated tubular plastic body member; a plastic bottom closure secured to one end portion of said body member; a plastic top closure secured to the other end portion of said body member; at least one opening in one of said closures; said top closure including a radially outwardly extending peripheral ledge overlying the top edge of said body member; a top chime being rolled inwardly about the top end portion of said body member and said top closure, said top chime when unrolled including a main body portion and a radially inwardly and downwardly extending top portion overlying and contacting the outer surfaces of said top closure ledge and said top end portion of said body member and clamping said top closure ledge and said top end portion of said body member together; said top chime being spirally wound inwardly about said top closure and said top end portion of said body member through at least 360° of arc and being completely out of contact with the interior of said drum; and, a bottom chime substantially identical in construction to said top chime securing said bottom closure to said body member.
Claim 2
Dependent Claim
198 words
An essentially all plastic drum comprising: an elongated tubular plastic body member; a plastic bottom closure secured to one end portion of said body member; a plastic top closure secured to the other end portion of said body member; at least one opening in one of said closures; said top closure including a radially outwardly extending peripheral ledge overlying the top edge of said body member; a top chime being rolled inwardly about the top end portion of said body member and said top closure, said top chime when unrolled including a main body portion and a radially inwardly and downwardly extending top portion overlying and contacting the outer surfaces of said top closure ledge and said top end portion of said body member and clamping said top closure ledge and said top end portion of said body member together; said top chime being spirally wound inwardly about said top closure and said top end portion of said body member through at least 360° of arc and being completely out of contact with the interior of said drum; and, a bottom chime substantially identical in construction to said top chime securing said bottom closure to said body member.
Claim 3
Dependent Claim
60 words
The drum in accordance with claim 1 wherein said bottom closure includes a base portion and surfaces extending upwardly from said base defining a recess and said top closure includes a base portion and surfaces extending from said base defining a protrusion, said protrusion being complementary to said recess whereby to enable stacking of said drum onto another similar drum.
Claim 4
Dependent Claim
61 words
The drum in accordance with claim 2 wherein said top closure protrusion is generally circular in plan interrupted by a section of said top closure base and further comprising a neck extending upwardly from said base section defining an access opening into the drum interior, said neck extending to a height less than the height of the top of said protrusion.
Claim 5
Dependent Claim
49 words
The drum in accordance with claim 3 further comprising a first reinforcing rib overlying portions of said base section extending radially inwardly from said neck and a second reinforcing rib overlying portions of said base section extending outwardly from said neck along the same radius as said first rib.
Claim 6
Dependent Claim
72 words
The drum in accordance with claim 4 further comprising a second section of said top closure base interrupting the circular plan of said protrusion, a second neck extending from said second section defining an opening into the drum interior; a first reinforcing rib overlying portions of said second section extending radially inwardly from said second neck and a second reinforcing rib extending radially outwardly from said second neck along the same radius.
Claim 7
Dependent Claim
19 words
The drum in accordance with claim 1 further comprising flexible means interconnecting said bottom closure and said body member.
Claim 8
Dependent Claim
27 words
The drum in accordance with claim 6 wherein said flexible means comprises an accordion-type member formed of a plurality of interconnected alternately upwardly and downwardly directed sections.
Claim 9
Dependent Claim
18 words
The drum in accordance with claim 6 wherein said flexible means is formed integrally with the bottom closure.
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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) | 1979-05-11 | 1979-11-10 | 1980-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-11 | 1983-11-10 | 1984-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-11 | 1987-11-10 | 1988-05-11 | $7700.00 | Window Closed / Lapsed |