US4668339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for dry deinking of secondary fiber sources
Assignee: Kimberly Clark Worldwide Inc
•
Filing: 1985-10-28
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Granted: 1987-05-26
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Expires: 2005-10-28
Abstract
Abstract Ink-bearing secondary fiber feedstocks are mechanically fiberized in a substantially dry state to produce substantially discrete fibers and ink-bearing fines, and the fibers are separated from the fines in a substantially dry state.
Inventors
- 👤 Byron R. Terry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:02
CPC Classifications
D; D21; D21H; D21H11/00; D21H11/14; D21B; D21B1/00; D21B1/04; D21B1/06; D21B1/08; D21B1/12; D21B1/30; D21B1/32; D21B1/325; D21C; D21C5/00; D21C5/02; D21C5/025; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/64
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
54 words
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.
Claim 2
Independent Claim
54 words
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.
Claim 3
Dependent Claim
14 words
A method according to claim 1 wherein said secondary fiber source is air dry.
Claim 4
Dependent Claim
34 words
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.
Claim 5
Dependent Claim
19 words
The method of claim 1 wherein the separated fibers are directly slurried in water for making a cellulosic product.
Claim 6
Dependent Claim
15 words
The method of claim 1 wherein the separated fibers are fed directly to an air-former.
Claim 7
Dependent Claim
18 words
The method of claim 1 wherein the separated fibers are formed into a substantially uniform batt and baled.
Claim 8
Dependent Claim
15 words
The method of claim 1 wherein the separated fibers are cleaned in an aqueous solution.
Claim 9
Dependent Claim
14 words
The method of claim 7 wherein the separated fibers are cleaned in a hydroclone.
Claim 10
Dependent Claim
16 words
The method of claim 7 wherein the separated fibers are cleaned by a wet deinking method.
Claim 11
Dependent Claim
35 words
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.
Claim 12
Independent Claim
58 words
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.
Claim 13
Independent Claim
58 words
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.
Claim 14
Dependent Claim
85 words
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.
Claim 15
Dependent Claim
85 words
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.
Claim 16
Dependent Claim
36 words
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.
Claim 17
Dependent Claim
35 words
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.
Claim 18
Dependent Claim
34 words
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.
Claim 19
Dependent Claim
34 words
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.
Claim 20
Dependent Claim
34 words
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.
Claim 21
Dependent Claim
36 words
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.
Claim 22
Dependent Claim
34 words
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.
Claim 23
Dependent Claim
34 words
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.
Claim 24
Independent Claim
50 words
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.
Claim 25
Independent Claim
50 words
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.
Claim 26
Independent Claim
47 words
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.
Claim 27
Independent Claim
47 words
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.
Claim 28
Dependent Claim
53 words
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.
Claim 29
Dependent Claim
53 words
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.
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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) | 1990-05-25 | 1990-11-24 | 1991-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-25 | 1994-11-24 | 1995-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-25 | 1998-11-24 | 1999-05-26 | $7700.00 | Window Closed / Lapsed |