Plunger for bottle making machine
Abstract
Abstract A vented plunger tip is provided for use with the Hartford I.S. Machine and similar blow and blow bottle equipment to vent air trapped by the glass gob as the glass gob is being forced into the mold and into engagement with the plunger tip to eliminate temperature variations and to thereby reduce settle wave problems. Central vent holes communicate from the tip of the plunger to an axial bore and exhaust ports extend from the axial bore through the side walls of the plunger to permit trapped air from the area near the tip of the plunger to escape. Pad vents in the neck ring mold and the blank mold are also disclosed for further assisting in the elimination of temperature differentials.
Inventors
- 👤 Adam J Lloyd
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |