Patent US2828922A successfully refreshed from Google Patents.
Patent US3353942A successfully refreshed from Google Patents.
US3353942A
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Method and apparatus for pressing thermoplastic materials
Assignee: Corning Glass Works
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Filing: 1964-10-08
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Granted: 1967-11-21
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Expires: 1984-10-08
Abstract
No abstract record available.
Inventors
- 👤 Raymond R Ambrogi
- 👤 Carmi Arich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:11
CPC Classifications
C; C03; C03B; C03B11/00; C03B11/06; B; B29; B29C; B29C43/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
THE METHOD OF FREE PRESSING AN ARTICLE OF THERMOPLASTIC MATERIAL IN A CAVITY FORMED BETWEEN A PRESS MOLD AND COOPERATING PLUNGER DURING A PRESSING OPERATION, SUCH METHOD COMPRISING, SUPPLYING A MOLTEN GOB OF SAID MATERIAL TO SAID MOLD; INSERTING AT LEAST ONE REMOVABLE STOP BETWEEN PARTS OF SAID MOLD AND PLUNGER TO DEFINE VERTICAL LIMITS FOR SAID CAVITY, SAID GOB HAVING A VOLUME LESS THAN SUCH CAVITY; PRESSING SAID GOB WITH SUFFICIENT PRESSURE TO CAUSE SAID MOLD AND PLUNGER PARTS TO CONTACT SAID STOP; AND THEREAFTER REDUCING THE PRESSING PRESSURE TO A VALUE SUFFICIENT ONLY TO CONTINUOUSLY MAINTAIN THE GLASS CONTACTING SURFACES OF SAID MOLD AND PLUNGER IN CONTACT WITH THE PRESSED SURFACES OF SAID GOB FOLLOWING THE REMOVAL OF SAID STOP, AND THEN REMOVING SUCH STOP.
Claim 2
Dependent Claim
71 words
IN AN APPARATUS FOR FREE PRESSING ARTICLES OF A THERMOPLASTIC MATERIAL AND INCLUDING A PRESS MOLD AND COOPERATING PLUNGER ASSEMBLY, THE COMBINATION COMPRISING, AT LEAST ONE MOVEABLE STOP INSERTABLE BETWEEN PARTS OF SAID MOLD AND PLUNGER ASSEMBLY FOR DEFINING VERTICAL LIMITS FOR THE PRESSING SPACE THEREBETWEEN, AND MOTOR MEANS CONNECTED TO EACH STOP FOR ACTUATING SUCH STOP TO AND FROM A POSITION OF INSERTION BETWEEN SAID MOLD AND PLUNGER ASSEMBLY PARTS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |