US3792140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for moulding the wall of the neck of an extruded hollow body
Assignee: Individual
•
Filing: 1971-12-08
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Granted: 1974-02-12
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Expires: 1991-12-08
Abstract
Abstract An upwards moving mandrel passes through an outlet hole in the bottom of a pair of blow molding dies. The mandrel carries two externally inflatable and deflatable bubbles. The first bubble carries a metal reinforcing ring which is positioned in the neck during the blow molding and retained there. The second bubble tears open the end of the extruded tube after it has been tuned inward into the hollow body and presses it to adhere against the inner wall of the body.
Inventors
- 👤 W Schiemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:12
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/20; B29C49/02; B29C49/04; B29C49/42; B29C49/58; B29C49/76; B29C2049/2008; B29C2049/2021; B29C2049/2026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |