US3145162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat reaction method for separation of paper sheets
Assignee: Packaging Corp of America
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Filing: 1961-12-14
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Granted: 1964-08-18
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Expires: 1981-12-14
Abstract
No abstract record available.
Inventors
- 👤 Robert A Caipen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:50
CPC Classifications
D; D21; D21B; D21B1/00; D21B1/02; D21B1/026; D21B1/028
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A METHOD OF SORTING SHEETS OF NON-HEAT REACTIVE PAPER FROM MANIFOLDS CONTAINING INTERLEAVED SUBSTANTIALLY FLAT SHEETS OF HEAT REACTIVE PAPER AND NON-HEAT REACTIVE PAPER, SAID METHOD INCLUDING AGITATING SAID MANIFOLDS WHEREBY THE SHEETS THEREOF ARE SEPARATED FROM ONE ANOTHER, APPLYING HEAT TO SAID SEPARATED SHEETS WHEREBY SAID HEAT REACTIVE SHEETS CURL AND SAID NON-HEAT REACTIVE SHEETS REMAIN SUBSTANTIALLY FLAT, ANDAGITATING SAID HEATED SEPARATED SHEETS IN A PREDETERMINED DIRECTION RELATIVE TO A PASSAGEWAY WHEREBY ONLY THE SUBSTANTIALLY FLAT SHEETS PASS THERETHROUGH.
Claim 2
Independent Claim
80 words
A METHOD OF SORTING SHEETS OF NON-HEAT REACTIVE PAPER FROM MANIFOLDS CONTAINING INTERLEAVED SUBSTANTIALLY FLAT SHEETS OF HEAT REACTIVE PAPER AND NON-HEAT REACTIVE PAPER, SAID METHOD INCLUDING AGITATING SAID MANIFOLDS WHEREBY THE SHEETS THEREOF ARE SEPARATED FROM ONE ANOTHER, APPLYING HEAT TO SAID SEPARATED SHEETS WHEREBY SAID HEAT REACTIVE SHEETS CURL AND SAID NON-HEAT REACTIVE SHEETS REMAIN SUBSTANTIALLY FLAT, ANDAGITATING SAID HEATED SEPARATED SHEETS IN A PREDETERMINED DIRECTION RELATIVE TO A PASSAGEWAY WHEREBY ONLY THE SUBSTANTIALLY FLAT SHEETS PASS THERETHROUGH.
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) | 1967-08-18 | 1968-02-17 | 1968-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-18 | 1972-02-17 | 1972-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-18 | 1976-02-17 | 1976-08-18 | $7700.00 | Window Closed / Lapsed |