Foraminous forming rolls for a papermaking machine produced from synthetic resins
Abstract
Abstract FORMING ROLLS, SUCH AS THE DANDY ROLLS AND THE CYLINDER MOLDS EMPLOYED IN THE PAPERMAKING ART, ARE FABBRICATED FROM SYNTHETIC RESINS TO REDUCE THEIR WEIGHT AND COST WHILE INCREASING THE CORROSION RESISTANCE AND EASE OF FABRICATION THEREOF TO PROVIDE HIGHLY POROUS STRUCTURES FACILITATING WATER PASSAGE. THE STRUCTURE OF THE INVENTION COMPRISES A HOLLOW CYLINDRICAL FORAMINOUS BODY PORTION WITH HEAD MEMBERS AT EACH END THEREOF TO PROVIDE FOR MOUNTING. THE BODY PORTION IS COMPRISED OF CIRCUMFERENTIALLY EXTENDING SUPPORT MEANS SPACED ALONG THE LENGTH THEREOF AND A MULTIPLICITY OF AXIALLY EXTENDING STIFFENING RODS AND TOP RODS ARRANGED ABOUT THE CIRCRUMFERENCE THEREOF, THE SUPPORT MEANS IN PART LYING RADIALLY OUTWARDLY OF THE STIFFENING RODS, AND THE TOP RODS LYING RADIALLY OUTWARDLY OF THE SUPPORT MEANS. THE WINDING WIRE AND SCREEN ARE SUPPORTED UPON THE TOP RODS, AND MAY BE SYNTHETIC RESIN IF SO DESIRED.
Inventors
- 👤 George H Franklin
Bibliographic Details
Claims Analysis
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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) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |