US4268235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the manufacture of fibrous webs
Assignee: Georgia Pacific Consumer Products LP
•
Filing: 1979-12-21
•
Granted: 1981-05-19
•
Expires: 1999-12-21
Abstract
Abstract Apparatus for the manufacture of a fibrous web comprises provision of a conduit having a plurality of outlets for discharging classified fibers onto a linearly movable planar section of an endless screen. The fibers pass through openings in the screen and land on an underlying planar section of a forming wire, in formation of the fibrous web, with the aid of an underlying vacuum box. Uniformity of fiber distribution is provided by parallel banks of brushes that engage the planar section of the endless screen and are rapidly oscillated in short, non-synchronous strokes transversely of the direction of screen movement.
Inventors
- 👤 William C. Bean
- 👤 Thomas M. Tao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:34
CPC Classifications
B; B27; B27N; B27N3/00; B27N3/08; B27N3/10; B27N3/14
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
111 words
Apparatus for manufacturing fiber webs, comprising: delivery means for dry fibers; an endless screen including a planar section linearly movable beneath said delivery means and effective to permit passage of fibers therethrough onto a forming wire provided therebeneath, and also linearly movable in the direction of movement of said planar section of said screen; vacuum box means disposed beneath said forming wire; and a plurality of banks of elongate brushes in parallel array, each extending transversely of the direction of movement of said screen and said forming wire and operative to oscillate longitudinally, thereby to engage and uniformly distribute said fibers as they pass through said screen onto said forming wire.
Claim 2
Dependent Claim
111 words
Apparatus for manufacturing fiber webs, comprising: delivery means for dry fibers; an endless screen including a planar section linearly movable beneath said delivery means and effective to permit passage of fibers therethrough onto a forming wire provided therebeneath, and also linearly movable in the direction of movement of said planar section of said screen; vacuum box means disposed beneath said forming wire; and a plurality of banks of elongate brushes in parallel array, each extending transversely of the direction of movement of said screen and said forming wire and operative to oscillate longitudinally, thereby to engage and uniformly distribute said fibers as they pass through said screen onto said forming wire.
Claim 3
Dependent Claim
10 words
Apparatus of claim 1, wherein said brushes engage said screen.
Claim 4
Dependent Claim
12 words
Apparatus of claim 1 wherein said brushes are spaced from said screen.
Claim 5
Dependent Claim
14 words
Apparatus of claim 1, wherein said banks of brushes are operative to oscillate non-synchronously.
Claim 6
Dependent Claim
16 words
Apparatus of claims 2 or 3, wherein said banks of brushes are operative to oscillate non-synchronously.
Claim 7
Dependent Claim
26 words
Apparatus of claim 1, wherein said planar sections of said screen and said forming wire are movable in the same direction at substantially the same speeds.
Claim 8
Dependent Claim
28 words
Apparatus of claim 2 or 3 wherein said planar section of said screen and said forming wire are movable in the same direction at substantially the same speeds.
Claim 9
Dependent Claim
28 words
Apparatus of claim 1, wherein said planar sections of said screen and said forming wire are movable in the same direction at different speeds relative to one another.
Claim 10
Dependent Claim
30 words
Apparatus of claims 1 or 2, wherein said planar sections of said screen and said forming wire are movable in the same direction at different speeds relative to one another.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-18 | 1984-11-17 | 1985-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-18 | 1988-11-17 | 1989-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-18 | 1992-11-17 | 1993-05-19 | $7700.00 | Window Closed / Lapsed |