Claims
- 1. A method of deinking an ink-bearing secondary fiber source comprising mechanically completely fiberizing the secondary fiber source to produce substantially discrete fibers and ink-bearing fines and separating the ink-bearing fines from said fibers, said fiberizing and separating occurring with less than about 20 weight percent mositure, whereby said fibers are suitable as secondary fiber.
- 2. A method according to claim 1 wherein said secondary fiber source is air dry.
- 3. The method of claim 1 wherein said ink-bearing fines are separated from said fibers by passing the ink-bearing fines through a screen having a mesh size sufficiently small to prevent passage of said fibers.
- 4. The method of claim 1 wherein the separated fibers are directly slurried in water for making a cellulosic product.
- 5. The method of claim 1 wherein the separated fibers are fed directly to an air-former.
- 6. The method of claim 1 wherein the separated fibers are formed into a substantially uniform batt and baled.
- 7. The method of claim 1 wherein the separated fibers are cleaned in an aqueous solution.
- 8. The method of claim 7 wherein the separated fibers are cleaned in a hydroclone.
- 9. The method of claim 7 wherein the separated fibers are cleaned by a wet deinking method.
- 10. The method of claim 1 wherein the secondary fiber source is selected from the group consisting of computer printout paper, photocopy paper, ink-coated board cured by ultra-violet light, lacquered board, newsprint, cigarette cartons, and magazines.
- 11. A method of deinking an ink-bearing secondary fiber source having a surface size comprising mechanically completely fiberizing the secondary fiber source to produce substantially discrete fibers and ink-bearing fines and separating the ink-bearing fines from said fibers, said fiberizing and separating occurring with less than about 20 weight percent mositure, whereby said fibers are suitable as secondary fiber.
- 12. A process for deinking an ink-bearing secondary fiber source and for making paper therefrom comprising:
- (a) mechanically completely fiberizing the secondary fiber source to produce substantially discrete fibers and ink-bearing fines, said fiberizing occurring with less than about 20 weight percent moisture;
- (b) separating said ink-bearing fines, said separation occurring with less than about 20 weight percent moisture;
- (c) slurrying said fibers with water to form a papermaking stock;
- (d) wet-laying the papermaking stock to form a web of fibers; and
- (e) drying the web.
- 13. The method according to claim 1 wherein the fibers and ink-bearing fines have a moisture content in the separating step substantially no greater than the moisture content of the secondary fiber source in the fiberizing step.
- 14. The method of claim 13 wherein the secondary fiber source is substantially air dry in the fiberizing step and wherein both the fibers and the ink-bearing fines are substantially air dry in the separating step.
- 15. The method of claim 13 wherein said ink-bearing fines are separated from said fibers by passing the ink-bearing fines through a screen having a mesh size sufficiently small to prevent passage of said fibers.
- 16. The method of claim 14 wherin said ink-bearing fines are separated from said fibers by passing the ink-bearing fines through a screen having a mesh size sufficiently small to prevent passage of said fibers.
- 17. The process of claim 12 wherein the secondary fiber source is substantially air dry in the fiberizing step and wherein the ink-bearing fines and the fibers are substantially air dry in the separating step.
- 18. The process of claim 12 wherein the ink-bearing fines and the fibers have a moisture content in the separating step substantially no greater than the moisture content of the secondary fiber source in the fiberizing step.
- 19. The process of claim 17 wherein said ink-bearing fines are separated from said fibers by passing the ink-bearing fines through a screen having a mesh size sufficiently small to prevent passage of said fibers.
- 20. The process of claim 18 wherein said ink-bearing fines are separated from said fibers by passing the ink-bearing fines through a screen having a mesh size sufficiently small to prevent passage of said fibers.
- 21. A method of deinking an ink-bearing air dry secondary fiber source comprising mechanically completely fiberizing the secondary fiber source air dry to produce substantially discrete fibers and ink-bearing fines and separating a substantial portion of the ink-bearing fines from the fibers air dry, whereby said fibers are suitable for papermaking.
- 22. A method of deinking an ink-bearing secondary fiber source comprising mechanically completely fiberizing the secondary fiber source air dry in a turbomill to produce substantially discrete fibers and ink-bearing fines and separating the ink-bearing fines from the fibers air dry, whereby said fibers are suitable for papermaking.
- 23. A methdd of deinking an ink-bearing secondary fiber source comprising mechanically completely fiberizing the secondary fiber source air dry to produce substantially discrete fibers and ink-bearing fines and separating the ink-bearing fines from the fibers air dry, whereby handsheets made from said fibers are brighter than handsheets made from the secondary fiber source.
Parent Case Info
This application is a continuation-in-part of application Ser. No. 554,174, filed Nov. 22, 1983, now abandoned, which is a continuation-in-part of application Ser. No. 450,812, filed Dec. 20, 1982 now abandoned.
US Referenced Citations (22)
Foreign Referenced Citations (15)
Number |
Date |
Country |
881748 |
Jul 1953 |
DEX |
915294 |
Jul 1954 |
DEX |
1097802 |
Jan 1961 |
DEX |
2704035 |
Aug 1978 |
DEX |
2836805 |
Apr 1979 |
DEX |
670419 |
Nov 1929 |
FRX |
1295608 |
May 1961 |
FRX |
53-134902 |
Apr 1977 |
JPX |
247284 |
Feb 1926 |
GBX |
940250 |
Oct 1963 |
GBX |
1134611 |
Nov 1968 |
GBX |
1228276 |
Apr 1971 |
GBX |
1472705 |
May 1977 |
GBX |
259624 |
Jul 1968 |
SUX |
1052592 |
Jun 1982 |
SUX |
Non-Patent Literature Citations (4)
Entry |
Wochenblatt fur Papierfabrikation 23/24, 1981, pp. 927, 928 and 930 (Auflosung von Altpapier bei hoher Stoffdichte). |
Wochenblatt fur Papierfabrikation 23/24, 1981 pp. 935-936 ("Turbosorter"). |
ABIPC #7863, vol. 34. No. 7, Mar. 1964. |
Dry Comminution of Waste Paper, by M. V. Vanchakov, V. N. Erokhin, M. N. Anurov. |
Continuation in Parts (2)
|
Number |
Date |
Country |
Parent |
554174 |
Nov 1983 |
|
Parent |
450812 |
Dec 1982 |
|