US4852792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self locking cover/bottom for fibre drums
Assignee: GREIF INDUSTRIAL PACKAGING & SERVICES LLC
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Filing: 1988-03-02
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Granted: 1989-08-01
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Expires: 2008-03-02
Abstract
Abstract A self locking cover/bottom for a fibre drum includes substantially perpendicular projections with inwardly tapered portions which, when in registry with notched portions in the fibre shell sidewall, engage the notched portions (which can bend inwardly) such that an airtight seal can be formed for the drum. An optional feature is the provision of a channel in the bottom to accommodate a tine of a fork lift truck.
Inventors
- 👤 James A. Hale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:14
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/56; B29C65/58; B29C66/00; B29C66/50; B29C66/51; B29C66/54; B29C66/543; B29C66/5432; B65; B65D; B65D15/00; B65D15/02; B65D15/04; B65D15/06; B65D15/08; B29C66/01; B29C66/05; B29C66/10; B29C66/12; B29C66/124; B29C66/1244; B29C66/12441; B29C66/80; B29C66/83; B29C66/832; B29C66/8322
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
189 words
The combination of a fibre drum and a self locking cover/bottom wherein the fibre drum includes a tubular drum side wall and opposed ends, the side wall having surfaces defining a plurality of spaced notches adjacent at least one of the ends, said notches being so constructed and arranged to have a free end facing the adjacent end and being movable radially inwardly into the interior of the side wall, and the cover/bottom comprising a planar surface and a peripherally extending depending projection in association with the exterior surfaces of the adjacent end of the side wall of the fibre drum and having a plurality of spaced tapered portions in registry with the notches, each tapered portion extending inwardly and towards the planar surface to engage, when in registry therewith, surfaces of the side wall defining the free end of a notch in the side wall, with the tapered portion projecting into the surfaces defining the associated notch to reinforce the fibre side walls of the notch and render it relatively impossible for the side wall to move away from the tapered portion of the projection of the cover/bottom.
Claim 2
Dependent Claim
189 words
The combination of a fibre drum and a self locking cover/bottom wherein the fibre drum includes a tubular drum side wall and opposed ends, the side wall having surfaces defining a plurality of spaced notches adjacent at least one of the ends, said notches being so constructed and arranged to have a free end facing the adjacent end and being movable radially inwardly into the interior of the side wall, and the cover/bottom comprising a planar surface and a peripherally extending depending projection in association with the exterior surfaces of the adjacent end of the side wall of the fibre drum and having a plurality of spaced tapered portions in registry with the notches, each tapered portion extending inwardly and towards the planar surface to engage, when in registry therewith, surfaces of the side wall defining the free end of a notch in the side wall, with the tapered portion projecting into the surfaces defining the associated notch to reinforce the fibre side walls of the notch and render it relatively impossible for the side wall to move away from the tapered portion of the projection of the cover/bottom.
Claim 3
Dependent Claim
56 words
The combination of claim 1 further comprising a channel extending around the periphery of said cover/bottom whereby said channel can be filled with a suitable adhesive such as a hot melt adhesive, and allowed to "set up" when the adjacent end of the side wall is locked in place so as to provide an additional seal.
Claim 4
Dependent Claim
23 words
The combination of claim 1 further comprising a channel extending transversely across said planar surface to facilitate lifting by a fork lift truck.
Claim 5
Dependent Claim
25 words
The combination of claim 1 wherein said notches have a fixed end in said side wall and the free ends are bendable radially upwardly movable.
Claim 6
Dependent Claim
11 words
The combination of claim 1 wherein said tapered portion is movable.
Claim 7
Dependent Claim
13 words
The combination of claim 1 wherein the cover/bottom is formed of plastic material.
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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) | 1992-07-31 | 1993-01-30 | 1993-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-31 | 1997-01-30 | 1997-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-31 | 2001-01-30 | 2001-08-01 | $7700.00 | Window Closed / Lapsed |