Method and apparatus for molding plastic articles
Abstract
Abstract METHOD AND APPARATUS ARE PROVIDED FOR FORMING A PLASTIC CLOSURE HAVING LUGS FORMED ON THE INNER SURFACE OF THE SKIRT. THE INNER SURFACE IS MOLDED AROUND A NOVEL FORCE PLUG WHICH PERMITS THE CLOSURE TO BE READILY REMOVED THEREFROM WITHOUT INTERFERENCE FROM THE LUGS. THE FORCE PLUG HAS A PLURALITY OF ELEMENTS WHICH COOPERATE TO DEFINE THE MOLDING SURFACE SURFACE FOR THE INNER PORTION OF THE CLOSURE INCLUDING A PLURALITY OF CAVITIES IN WHICH THE LUGS ARE TO BE FORMED. THE ELEMENTS ARE MOVABLE BOTH AXIALLY AND ROTATIVELY RELATIVE TO ONE ANOTHER TO PROVIDE, UPON COMPLETION OF THE MOLDING OPERATION, AN OPEN PASSAGE FOR THE CLOSURE IWTH ITS INTEGRALLY FORMED LUG TO BE REMOVED AXIALLY THEREFROM.
Inventors
- 👤 Blaine M Allison
Bibliographic Details
Claims Analysis
Total Claims: 0References 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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |