Automatic sprue extractor for use in injection molding machines
Abstract
Abstract AN AUTOMATIC SPRUE EXTRACTOR FOR AN INJECTION MOLDING MACHINE OF THE TYPE HAVING A MOLDING ASSEMBLAGE AND A BOTTOM LAST PROVIDED WITH AN AXIAL CHANNEL COMMUNICATING WITH THE MOLDING CAVITY BY PORTS AND HAVING AN APERTURE LEADING TO THE AXIAL CHANNEL THROUGH WHICH THE DESIRED THERMOPLASTIC MATERIAL IS INJECTED WITH SUCH CHANNEL, WITH THE PORTS AND APERTURE HAVING A SPRUE FORMED THEREIN UPON SETTING OR SOLIDIFYING OF THE THERMOPLASTIC MATERIAL, THE EXTRACTOR INCLUDING A POWER OPERATED CYLINDER-PISTON ASSEMBLY SO RELATED TO THE INJECTION STATION THAT UPON ACTIVATION OF THE CYLINDER-PISTON UNIT, THE PISTON ROD IS EXTENDED TO PERMIT A GRIPPING MEANS ASSOCIATED THEREWITH TO GRASP THE TAIL OF THE SPRUE AND UPON SUCH GRIPPING ACTION, THE PISTON ROD RETRACTS INTO THE CYLINDER THEREBY WITHDRAWING THE SPRUE AND UPON COMPLETION OF THE LAST MENTIONED MOVEMENT, THE GRIPPING MEANS RELEASES THE SPRUE FOR DEPOSIT INTO A SUITABLE RECEPTACLE.
Inventors
- 👤 Paul E Metzger
Bibliographic Details
Claims Analysis
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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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |