Patent US4140236A successfully refreshed from Google Patents.
US4140236A
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US
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Method for blow molding hollow article with integrally bonded attachment, and article
Assignee: SCHUTZ CONTAINER SYSTEMS Inc
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Filing: 1977-08-04
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Granted: 1979-02-20
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Expires: 1997-08-04
Abstract
Abstract Disclosed is a method for making a hollow plastic article having a separate full ring-shaped member bonded to the article within the blow mold, and the article so made.
Inventors
- 👤 Albert R. Uhlig
- 👤 Andrew J. Stoll, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:01
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/20; B29C49/02; B29C49/04; B65; B65D; B65D25/00; B65D25/20; B65D25/22; B65D25/24; B29C2049/2017; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
94 words
A hollow plastic article having a circumferential sidewall terminating in a closed top end and having a generally cylindrical member of hard material surrounding the periphery of the article and projecting axially above at least a portion of said top end, said member being out of contact with said top end and having (1) a lower inwardly radially extending flange locked into said sidewall by a mechanical interference fit and (2) an upper outwardly radially extending flange forming a downwardly facing circumferential annular ledge and adapted to be grasped by steel drum chime-handling devices.
Claim 2
Dependent Claim
94 words
A hollow plastic article having a circumferential sidewall terminating in a closed top end and having a generally cylindrical member of hard material surrounding the periphery of the article and projecting axially above at least a portion of said top end, said member being out of contact with said top end and having (1) a lower inwardly radially extending flange locked into said sidewall by a mechanical interference fit and (2) an upper outwardly radially extending flange forming a downwardly facing circumferential annular ledge and adapted to be grasped by steel drum chime-handling devices.
Claim 3
Dependent Claim
72 words
A hollow plastic article formed by blow molding, having a generally circumferential sidewall and closed ends and intermediate said ends an annular ring of hard material having a generally U shape in cross-section with the open end of the U facing upwardly, the inner leg of the "U" being embedded in an annular groove in said sidewall and being locked in said sidewall by an interference fit created during said blow molding.
Claim 4
Dependent Claim
72 words
A hollow plastic article formed by blow molding, having a generally circumferential sidewall and closed ends and intermediate said ends an annular ring of hard material having a generally U shape in cross-section with the open end of the U facing upwardly, the inner leg of the "U" being embedded in an annular groove in said sidewall and being locked in said sidewall by an interference fit created during said blow molding.
References Cited (Backward Citations)
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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) | 1982-02-19 | 1982-08-21 | 1983-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-19 | 1986-08-21 | 1987-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-19 | 1990-08-21 | 1991-02-20 | $7700.00 | Window Closed / Lapsed |