Patent US2956916A successfully refreshed from Google Patents.
US3072964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming sheet plastic material
Assignee: Individual
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Filing: 1960-01-08
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Granted: 1963-01-15
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Expires: 1980-01-08
Abstract
No abstract record available.
Inventors
- 👤 Carl V Tilden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:29
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/04; B29C51/06
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
119 words
VACUUM MOLDING APPARATUS FOR SHEET THERMOPLASTIC MATERIAL COMPRISING, A HOUSING HAVING A TRANSVERSE FORAMINOUS SUPPORT FOR A MOLD PATTERN AND INCLUDING A RELATIVELY MOVABLE HOUSING SURROUNDING SAID PATTERN SUPPORT, SAID MOVABLE HOUSING HAVING MEANS THEREON FOR TEMPORARILY SECURING SHEET PLASTIC THERETO IN A POSITION GENERALLY PARALLEL TO SAID PATTERN, MEANS EXTERIORLY OF SAID PLASTIC SECURING MEANS FOR HEATING SAID PLASTIC TO MOLDING TEMPERATURE, AND MEANS FOR MOVING SAID SHEET PLASTIC AND MOLD TOWARD ONE ANOTHER WHILE SLIGHTLY COMPRESSING THE INTERVENING AIR AND INCLUDING MEANS OPERABLE AUTOMATICALLY BY MOVEMENT OF SAID LAST MENTIONED MEANS FOR SUDDENLY EVACUATING THE SPACE WITHIN BOTH OF SAID HOUSINGS, WHEREBY THE VACUUM IS EFFECTIVE TO MOLD SAID PLASTIC SNUGLY INTO PRECISE CONTACT WITH THE PATTERN.
Claim 2
Dependent Claim
119 words
VACUUM MOLDING APPARATUS FOR SHEET THERMOPLASTIC MATERIAL COMPRISING, A HOUSING HAVING A TRANSVERSE FORAMINOUS SUPPORT FOR A MOLD PATTERN AND INCLUDING A RELATIVELY MOVABLE HOUSING SURROUNDING SAID PATTERN SUPPORT, SAID MOVABLE HOUSING HAVING MEANS THEREON FOR TEMPORARILY SECURING SHEET PLASTIC THERETO IN A POSITION GENERALLY PARALLEL TO SAID PATTERN, MEANS EXTERIORLY OF SAID PLASTIC SECURING MEANS FOR HEATING SAID PLASTIC TO MOLDING TEMPERATURE, AND MEANS FOR MOVING SAID SHEET PLASTIC AND MOLD TOWARD ONE ANOTHER WHILE SLIGHTLY COMPRESSING THE INTERVENING AIR AND INCLUDING MEANS OPERABLE AUTOMATICALLY BY MOVEMENT OF SAID LAST MENTIONED MEANS FOR SUDDENLY EVACUATING THE SPACE WITHIN BOTH OF SAID HOUSINGS, WHEREBY THE VACUUM IS EFFECTIVE TO MOLD SAID PLASTIC SNUGLY INTO PRECISE CONTACT WITH THE PATTERN.
Claim 3
Dependent Claim
66 words
VACUUM APPARATUS AS DEFINED IN CLAIM 1 CHARACTERIZED IN THE PROVISION OF MEANS PROVIDING A CONTINUOUS SOURCE OF VACUUM OF SUFFICIENT CAPACITY TO EVACUATE SAID HOUSINGS SUDDENLY, AND VALVE MEANS FOR SAID VACUUM SOURCE, SAID VALVE MEANS BEING OPERATIVELY CONNECTED TO ONE OF SAID HOUSINGS AND MOVABLE TO OPEN POSITION AS AN INCIDENT OF THE MOVEMENT OF SAID SHEET AND OF SAID PATTERN TOWARD ONE ANOTHER.
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) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |