US3155379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pre-expander for pellets of plastic material
Assignee: Champlain-Zapata Plastics Machinery Inc
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Filing: 1962-01-29
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Granted: 1964-11-03
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Expires: 1982-01-29
Abstract
No abstract record available.
Inventors
- 👤 Paul E Fischer
- 👤 Jr William A Heatley
- 👤 Frank H Lambert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:41
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/3461; Y; Y10; Y10S; Y10S264/00; Y10S264/09; Y10S264/65
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A PRE-EXPANDER FOR PELLETS OF PLASTIC MATERIAL, SAID PRE-EXPANDER COMPRISING A CYLINDER WHICH IS OPEN AT ONE END, A CLOSURE FOR THAT END, A PISTON SLIDABLE IN SAID CYLINDER AND ACTING AS A MOVABLE BOTTOM, A ROD CONNECTING SAID PISTON AND CLOSURE FOR MOVEMENT IN UNISON, MEANS OPERATIVELY ASSOCIATED WITH SAID CYLINDER FOR HEATING THE INTERIOR THEREOF TO EXPAND THE PELLETS OF PLASTIC MATERIAL, AND AN ACTUATOR HAVING A ROD CONNECTED TO SAID PISTON AND CLOSURE ASSEMBLY TO MOVE THE SAME BETWEEN AN INTERMEDIATE OPEN POSITION FOR RECEIVING A CHARGE OF UNEXPANDED PELLETS, A CLOSED POSITION IN WHICH THE PELLETS ARE TREATED TO EXPAND THE SAME, AND A PROTRUDED POSITION IN WHICH THE PISTON IS MOVED TO THE OPEN END OF THE CYLINDER TO DISCHARGE THE EXPANDED PELLETS FROM THE CYLINDER.
Claim 2
Dependent Claim
131 words
A PRE-EXPANDER FOR PELLETS OF PLASTIC MATERIAL, SAID PRE-EXPANDER COMPRISING A CYLINDER WHICH IS OPEN AT ONE END, A CLOSURE FOR THAT END, A PISTON SLIDABLE IN SAID CYLINDER AND ACTING AS A MOVABLE BOTTOM, A ROD CONNECTING SAID PISTON AND CLOSURE FOR MOVEMENT IN UNISON, MEANS OPERATIVELY ASSOCIATED WITH SAID CYLINDER FOR HEATING THE INTERIOR THEREOF TO EXPAND THE PELLETS OF PLASTIC MATERIAL, AND AN ACTUATOR HAVING A ROD CONNECTED TO SAID PISTON AND CLOSURE ASSEMBLY TO MOVE THE SAME BETWEEN AN INTERMEDIATE OPEN POSITION FOR RECEIVING A CHARGE OF UNEXPANDED PELLETS, A CLOSED POSITION IN WHICH THE PELLETS ARE TREATED TO EXPAND THE SAME, AND A PROTRUDED POSITION IN WHICH THE PISTON IS MOVED TO THE OPEN END OF THE CYLINDER TO DISCHARGE THE EXPANDED PELLETS FROM THE CYLINDER.
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) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |