Method of and apparatus for winding a web of material
Abstract
Abstract METHOD OF CNTINUOUSLY WINDING A WEB OF SHEET MATERIAL, SUCH AS PLASTIC FILM ONTO A WINDUP ROLL INCLUDING THE STEP OF FORCING AIR FROM BETWEEN THE LAYERS OF THE WB AS IT IS WOUND BY SELECTIVELY PRESSING THE WEB AGAINST THE WINDUP ROLL WITH A PRESSURE ROLL HAVING A PREDETERMINED SOLID AREA DEFINING OPEN AREAS THEREBETWEEN WHEREBY A PREDETERMINED AMOUNT OF AIR IS LEFT BETWEEN THE LAYERS TO CONTROL THE HARDNESS OF THE WOUND ROLL. APPARATUS IS PROVIDED FOR PERFORMING THIS METHOD OF WINDING. IN SUCH APPARATUS, THE OPEN SURFACE AREAS OF THE CONTACT ROLL GENERALLY CONSTITUTE FROM 5% TO 65% OF THE TOTAL SURFACE AREA OF SUCH ROLL AND, PREFERABLY, FROM 30% TO 36% THEREOF.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |