Patent US4213983A successfully refreshed from Google Patents.
US3299476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Injection molding cut-off device
Assignee: United Shoe Machinery Corp
•
Filing: 1964-08-12
•
Granted: 1967-01-24
•
Expires: 1984-08-12
Abstract
No abstract record available.
Inventors
- 👤 Donald B Mcilvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:19
CPC Classifications
B; B29; B29D; B29D35/00; B29D35/0009; B29C; B29C45/00; B29C45/17; B29C45/20; B29C45/76; B29C45/7613
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
IN AN INJECTION MOLDING MACHINE, AN AUTOMATIC INJECTION CUT-OFF MEANS COMPRISING A NOZZLE INTERCONNECTING THE MOLD CAVITY AND A SOURCE OF PRESSURIZED AIR, AN INSERT IN THE CAVITY END OF SAID NOZZLE HAVING A POROSITY SUFFICIENT TO PERMIT THE FLOW OF AIR THERETHROUGH BUT INSUFFICIENT TO PERMIT THE FLOW OF FLUID PLASTIC, AND AN INJECTION STOP MEANS IN COMMUNICATION WITH SAID AIR SOURCE, SAID INJECTION STOP MEANS BEING RESPONSIVE TO A BACK PRESSURE CAUSED BY COVERING OF SAID INSERT WITH FLUID PLASTIC FOR TERMINATING THE FLOW OF PLASTIC INTO THE MOLD CAVITY.
Claim 2
Dependent Claim
92 words
IN AN INJECTION MOLDING MACHINE, AN AUTOMATIC INJECTION CUT-OFF MEANS COMPRISING A NOZZLE INTERCONNECTING THE MOLD CAVITY AND A SOURCE OF PRESSURIZED AIR, AN INSERT IN THE CAVITY END OF SAID NOZZLE HAVING A POROSITY SUFFICIENT TO PERMIT THE FLOW OF AIR THERETHROUGH BUT INSUFFICIENT TO PERMIT THE FLOW OF FLUID PLASTIC, AND AN INJECTION STOP MEANS IN COMMUNICATION WITH SAID AIR SOURCE, SAID INJECTION STOP MEANS BEING RESPONSIVE TO A BACK PRESSURE CAUSED BY COVERING OF SAID INSERT WITH FLUID PLASTIC FOR TERMINATING THE FLOW OF PLASTIC INTO THE MOLD CAVITY.
References Cited (Backward Citations)
US3025568A
Cited
US3014242A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |