Method and apparatus for conditioning and defibrating a web of paper pulp prior to air laying
Abstract
Abstract IN AN APPARATUS FOR A METHOD OF DEFIBRATING A WEB OF WOOD PULP, THE WEB IS CONDITIONED BY A UNIFORM SPRAY OF LIQUID IMPINGING ON THE WEB IN A UNIFORM PATTERN AND WITH A UNIFORM DENSITY ACROSS THE FULL WIDTH OF THE WEB. THE SPRAY MAY BE A MIXTURE OF MINERAL OIL AND WATER AND MAY BE GENERATED BY ROTATING A DIP ROLLER INTO A TANK OF THE LIQUID TO LIFT A FILM OF LIQUID TO A ROTATING BRUSH ROLLER. THE ROTATIONAL SPEED OF THE BRUSH ROLLER IS HELD CONSTANT AND THE ROTATIONAL SPEED OF THE DIP ROLLER IS VARIED IN ACCORDANCE WITH THE WEB TRAVEL SPEED TO PROVIDE A UNIFORM DENSITY OF SPRAY, PREFERABLY ON BOTH SIDES OF THE WEB. THE LIQUID IN THE TANKS MAY BE HELD AT A CONSTANT LEVEL BY A CONTROLLED SUPPLY MEANS.
Inventors
- 👤 James A Murphy
- 👤 Charles Allen Lee
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |