US3553788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot runner system for plastic injection molds
Assignee: Individual
•
Filing: 1968-09-10
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Granted: 1971-01-12
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Expires: 1988-09-10
Abstract
Abstract A HOT RUNNER SYSTEM HAVING A HOT RUNNER TUBE EXTENDING BETWEEN A SPRUE BUSHING AND A NOZZLE FITTING WHICH DIRECTS PLASTIC INTO THE MOLD CAVITY. THE TUBE IS SLIDABLE AT EACH END IN CLOSELY FITTING BORES IN THE SPRUE BUSHING AND NOZZLE FITTING, SO THAT HEAT EXPANSION OF THE TUBE WILL NOT PUSH ON AND TILE THE NOZZLE FITTING. IN ANOTHER EMBODIMENT, THE HOT RUNNER TUBE CONDUCTS PLASTIC DIRECTLY INTO A GATE LEADING INTO A MOLD CAVITY. THE TUBE HAS A TIP EXTENDING INTO THE GATE, AND THE TUBE CAN BE SLID BACK AND FORTH TO CONTROL THE FLOW AREA OF THE GATE.
Inventors
- 👤 Ladislao Wladyslaw Putkowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:27
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/26; B29C45/27; B29C45/28; B29C45/2806; B29C2045/2774; B29C2045/2796; B29C2045/2798; B29C45/281; B29C2045/2827
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |