Patent US3568330A successfully refreshed from Google Patents.
US3568330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature maintaining transport rolls
Assignee: Armstrong World Industries Inc
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Filing: 1969-07-31
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Granted: 1971-03-09
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Expires: 1989-07-31
Abstract
Abstract THE APPARATUS INVOLVES TWO HEATED ROLLS WHICH ARE SUSPENDEND BETWEEN TWO LARGE END SUPPORTS. THE SHEET WHICH IS HEATED BY THE ROLLS PASSES AROUND THE ROLLS. DEPENDING UPON THE POSITIONING OF THE ROLLS RELATIVE TO THE PATH OF MOVEMENT OF THE SHEET, THE AMOUNT OF CONTACT THAT THE SHEET MAKES WITH THE ROLLS MAY BE VARIED. THIS VARIATION OF CONTACT WITH THE ROLLS WILL CAUSE VARIATIONS IN THE TEMPERTURE TO WHICH THE SHEET IS HEATED. MOVEMENT OF THE ROLLS RELATIVE TO THE PATHWAY OF THE SHEET IS AFFECTED BY THE END SUPPORTS WHICH ARE CAPABLE OF MOVEMENT TO POSITION THE ROLLS IN DIFFERENT POSITIONS.
Inventors
- 👤 Oliver R Bechtold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:02
CPC Classifications
D; D06; D06C; D06C7/00; D21; D21F; D21F5/00; D21F5/02; D06C2700/00; D06C2700/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |