US3200437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for rendering polystyrene sheet material flexible
Assignee: Swedish Crucible Steel Co
•
Filing: 1962-02-16
•
Granted: 1965-08-17
•
Expires: 1982-02-16
Abstract
No abstract record available.
Inventors
- 👤 Alvin M Sasanko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:07
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/56; Y; Y10; Y10S; Y10S264/00; Y10S264/04; Y10S264/15
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
AN APPARATUS FOR RENDERING EXPANDED POLYSTYRENE SHEE MATERIAL FLEXIBLE, COMPRISING AN ELONGATED APPROXIMATELY PRESSURE-TIGHT HOUSING HAVING AN INLET OPENING AND AN OUTLET OPENING, A MAIN SHEET MATERIAL CONVEYOR EXTENDING FROM SAID INLET OPENING TO SAID OUTLET OPENING, MEANS FOR SUPPLYING STEAM UNDER PRESSURE TO SAID HOUSING, AND FOR SEALING SAID SHEET MATERIAL AGAINST SUBSTANTIAL ESCAPE OF STEAM DURING ENTRANCE INTO SAID INLET OPENING AND EXIT FROM SAID OUTLET OPENING, POWER-DRIVEN MECHANISM DRIVINGLY CONNECTED TO SAID MAIN CONVEYOR IN OPERATING RELATIONSHIP THEREWITH, AND CONTROL MEANS INCLUDING A HUMPING DETECTION DEVICE DISPOSED NEAR SAID INLET OPENING AND RESPONSIVE TO HUMPING OF THE CONVEYED SHEET MATERIAL UPWARD FROM SAID MAIN CONVEYOR ABOE ITS NORMAL PATH OF TRAVEL THEREON NEAR SAID INLET OPENING FOR TEMPORARILY INCREASING THE SPEED OF SAID MECHANISM TO TEMPORARILY SPEED UP SAID MAIN CONVEYOR AND CONSEUQENTLY ELIMINATE SAID HUMPING BY TAKING UP ANY SLACK IN THE SHEET MATERIAL BEING DEPOSITED ON SAID MAIN CONVEYOR.
Claim 2
Independent Claim
154 words
AN APPARATUS FOR RENDERING EXPANDED POLYSTYRENE SHEE MATERIAL FLEXIBLE, COMPRISING AN ELONGATED APPROXIMATELY PRESSURE-TIGHT HOUSING HAVING AN INLET OPENING AND AN OUTLET OPENING, A MAIN SHEET MATERIAL CONVEYOR EXTENDING FROM SAID INLET OPENING TO SAID OUTLET OPENING, MEANS FOR SUPPLYING STEAM UNDER PRESSURE TO SAID HOUSING, AND FOR SEALING SAID SHEET MATERIAL AGAINST SUBSTANTIAL ESCAPE OF STEAM DURING ENTRANCE INTO SAID INLET OPENING AND EXIT FROM SAID OUTLET OPENING, POWER-DRIVEN MECHANISM DRIVINGLY CONNECTED TO SAID MAIN CONVEYOR IN OPERATING RELATIONSHIP THEREWITH, AND CONTROL MEANS INCLUDING A HUMPING DETECTION DEVICE DISPOSED NEAR SAID INLET OPENING AND RESPONSIVE TO HUMPING OF THE CONVEYED SHEET MATERIAL UPWARD FROM SAID MAIN CONVEYOR ABOE ITS NORMAL PATH OF TRAVEL THEREON NEAR SAID INLET OPENING FOR TEMPORARILY INCREASING THE SPEED OF SAID MECHANISM TO TEMPORARILY SPEED UP SAID MAIN CONVEYOR AND CONSEUQENTLY ELIMINATE SAID HUMPING BY TAKING UP ANY SLACK IN THE SHEET MATERIAL BEING DEPOSITED ON SAID MAIN CONVEYOR.
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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) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |