US3227424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for pre-expanding plastic material
Assignee: TRI Manufacturing AND SALES CO
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Filing: 1964-01-23
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Granted: 1966-01-04
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Expires: 1984-01-23
Abstract
No abstract record available.
Inventors
- 👤 Marvin H Cunningham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:48
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/3461; Y; Y10; Y10S; Y10S264/00; Y10S264/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
IN APPARATUS FOR PRE-EXPANDING POLYMERIC PARTICULATE MATERIAL, SAID APPARATUS COMPRISING A CHAMBER, INLET MEANS FOR INTRODUCING A MIXTURE OF POLYMERIC PARTICULATE MATERIAL, STEAM AND AIR ADJACENT TO THE LOWER PORTION OF SAID CHAMBER, AND A ROTATABLE AGITATOR ASSEMBLY DISPOSED WITHIN SAID CHAMBER SAID POLYMERIC PARTICULATE MATERIAL FORMING BEADS WHICH EXPAND AND RISE WITHIN SAID CHAMBER, THE IMPROVEMENT WHICH COMPRISES A DISCHARGE CHUTE FOR DISCHARGING POLYMERIC PARTICULATE MATERIAL FROM THE UPPER PORTION OF SAID MATERIAL WITHIN SAID CHAMBER AFTER SAID MATERIAL HAS UNDERGONE A PREDETERMINED EXPANSION, AND MEANS FOR MOUNTING SAID DISCHARGE CHUTE AT ANY OF A PLURALITY OF HEIGHTS RELATIVE TO THE BOTTOM OF SAID CHAMBER, THE HEIGHT OF SAID CHUTE CONTROLLING THE RESIDENCE TIME OF SAID MATERIAL IN SAID CHAMBER INDEPENDENTLY OF THE FEED RATE THEREOF.
Claim 2
Dependent Claim
127 words
IN APPARATUS FOR PRE-EXPANDING POLYMERIC PARTICULATE MATERIAL, SAID APPARATUS COMPRISING A CHAMBER, INLET MEANS FOR INTRODUCING A MIXTURE OF POLYMERIC PARTICULATE MATERIAL, STEAM AND AIR ADJACENT TO THE LOWER PORTION OF SAID CHAMBER, AND A ROTATABLE AGITATOR ASSEMBLY DISPOSED WITHIN SAID CHAMBER SAID POLYMERIC PARTICULATE MATERIAL FORMING BEADS WHICH EXPAND AND RISE WITHIN SAID CHAMBER, THE IMPROVEMENT WHICH COMPRISES A DISCHARGE CHUTE FOR DISCHARGING POLYMERIC PARTICULATE MATERIAL FROM THE UPPER PORTION OF SAID MATERIAL WITHIN SAID CHAMBER AFTER SAID MATERIAL HAS UNDERGONE A PREDETERMINED EXPANSION, AND MEANS FOR MOUNTING SAID DISCHARGE CHUTE AT ANY OF A PLURALITY OF HEIGHTS RELATIVE TO THE BOTTOM OF SAID CHAMBER, THE HEIGHT OF SAID CHUTE CONTROLLING THE RESIDENCE TIME OF SAID MATERIAL IN SAID CHAMBER INDEPENDENTLY OF THE FEED RATE THEREOF.
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) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |