Planographic plate-making process and sheets
Abstract
Abstract PROCESS FOR MAKING PLANOGRAPHIC PRINTING PAPER IN AN CONTINUOUS OPERATION ON A PAPER-MAKING MACHINE. A PAPER WEB IS FORMED FROM AN AQUEOUS SLURRY AND DRIED TO THE POINT THAT IT CONTAINS FROM ABOUT 5% TO ABOUT 30% MOISTURE AND IS SELF-SUPPORTING. A COATING OF INSOLUBILIZING SIZING COMLPOSITION, COMPRISING A HYDROPHILIC FILM-FORMING BINDER MATERIAL SUCH AS POLYVINYL ALCOHOL IS APPLIED TO BOTH SIDES OF THE WEB, THE SIZED WEB IS HEATED SUFFICIENTLY TO DRY THE SIZING COMPOSITION TO THE POINT THAT IT IS NON-TACKY, BUT WITHOUT SUBSTANTIAL INSOLUBILIZATION OF THE SIZE, AND THEN A COATING OF SELF-INSOLUBILIZING PLANOGRAPHIC COMPSOITION, COMPRISING 1 PART BY WEIGHT OF A HYDROPHILIC FILM-FORMING BINER MATERIAL, SUCH AS POLYVINYL ALCOHOL AN INSOLUBILZING AGENT SUCH AS GLYOXAL, AND FROM 4 TO 8 PARTS BY WEIGHT OF A FILLER, SUCH AS CLAY, SILICA, OR A MIXTURE OF BOTH, IS APPLIED TO AT LEAST ONE SIDE OF THE WEB. FINALLY THE COATINGS ARE INSOLUBILIZED TOGETHER AND THE WEB IS CALENDERED, ALL ON THE PAPER-MAKING MACHINE.
Inventors
- 👤 Douglas A Newman
Bibliographic Details
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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) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |