Patent US3976431A successfully refreshed from Google Patents.
US3976431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wiped-wall reactor
Assignee: Honeywell International Inc
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Filing: 1975-05-06
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Granted: 1976-08-24
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Expires: 1995-05-06
Abstract
Abstract In an essentially horizontal totally enclosed cylindrical wiped-wall polymer reactor having an essentially horizontal polymer flow, a pool of polymer in its lower portion, and driven wheels to create high surface area in the polymer to facilitate evaporation of volatiles from the polymer, the improvement comprising a freewheeling drag wheel driven by the driven wheels, with a wiping means mounted on the driven wheels and actuated by the drag wheel to wipe the entire internal circumference of the cylindrical reactor. The drag wheel generates a force to urge the wiping means outward against the internal circumference of the reactor. The force is generated by the drag of the pool of polymer on the drag wheel. This keeps the wall of the reactor wiped with a fresh film of polymer. The process and apparatus is particularly adaptable to driven wheels and drag wheels eccentrically mounted in the reactor.
Inventors
- 👤 Beryl Aaron Boggs
- 👤 Laszlo Joseph Balint
- 👤 Patrick William Ager
- 👤 Edward Jerome Buyalos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:22
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/18; B01J19/20; B01J10/00; B01J10/02; B01J19/0053; B01J19/0066; B01J19/1887; B08; B08B; B08B9/00; B08B9/08; B08B9/087; B29; B29B; B29B7/00; B29B7/30; B29B7/34; B29B7/38; B29B7/40; B29B7/44; B01J2219/00; B01J2219/00761; B01J2219/00763; B01J2219/00779
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
122 words
In an essentially horizontal totally enclosed cylindrical wiped-wall polymer reactor having essentially horizontal polymer flow, said reactor having a pool of said polymer in its lower portion and having driven wheels to create high polymer surface area said high surface area to facilitate evaporation of volatiles from said polymer, the improvement comprising a free-wheeling drag wheel driven by said driven wheels, a wiping means mounted on said driven wheels and actuated by said drag wheel so as to wipe the entire internal circumference of said cylindrical reactor, whereby said drag wheel generates a force to urge said wiping means against said internal circumference of said reactor, said force generated by the drag of said pool of said polymer on said drag wheel.
Claim 2
Dependent Claim
122 words
In an essentially horizontal totally enclosed cylindrical wiped-wall polymer reactor having essentially horizontal polymer flow, said reactor having a pool of said polymer in its lower portion and having driven wheels to create high polymer surface area said high surface area to facilitate evaporation of volatiles from said polymer, the improvement comprising a free-wheeling drag wheel driven by said driven wheels, a wiping means mounted on said driven wheels and actuated by said drag wheel so as to wipe the entire internal circumference of said cylindrical reactor, whereby said drag wheel generates a force to urge said wiping means against said internal circumference of said reactor, said force generated by the drag of said pool of said polymer on said drag wheel.
Claim 3
Dependent Claim
19 words
The apparatus of claim 1 wherein said driven wheels and said drag wheel are mounted on the same shaft.
Claim 4
Dependent Claim
23 words
The apparatus of claim 2 wherein said driven wheels and said drag wheel are mounted eccentrically with respect to said reactor horizontal axis.
Claim 5
Dependent Claim
16 words
The apparatus of claim 1 wherein said drag wheel has a drag improving means mounted thereon.
Claim 6
Dependent Claim
23 words
The apparatus of claim 4 wherein said drag means is a flat projection extending generally transverse to the radius of said drag wheel.
Claim 7
Dependent Claim
28 words
The apparatus of claim 4 wherein said drag means is a cup-like device projecting outwardly from said drag wheel essentially transversely to the radius of said drag wheel.
Claim 8
Dependent Claim
23 words
The apparatus of claim 1 wherein each of said driven wheels has turbine-like projections to provide pumping of said polymer through said reactor.
Claim 9
Dependent Claim
26 words
Apparatus of claim 1 wherein said driven wheels adjacent the ends of said reactor have mounted thereon means for wiping the end walls of said reactor.
Claim 10
Dependent Claim
58 words
Apparatus of claim 1 wherein said drag wheel transmits said force generated by said drag wheel to said wiping means by means of sliding contact of restraining means fixably mounted on said drag wheel with an arm of said wiping means, said arm pivoting from a point stationary on said driven wheel to urge said wiping means outward.
Claim 11
Dependent Claim
17 words
Apparatus of claim 9 wherein said arm pivots about the connecting means to drive said drag wheel.
Claim 12
Dependent Claim
18 words
Apparatus of claim 9 wherein said restraining means is a pair of pins mounted on said drag wheel.
Claim 13
Dependent Claim
138 words
In the process of removing volatiles from a polymer by evaporation by creating high polymer surface area with driven wheels in an essentially horizontal totally enclosed cylindrical wiped-wall polymer reactor having essentially horizontal polymer flow, said reactor having a pool of said polymer in its lower portion, the improvement comprising a. keeping the wall of said reactor wetted with a fresh film of polymer by driving a free-wheeling drag wheel by means of said driven wheels, said driven wheel having wiping means mounted thereon, said wiping means being actuated outward radially said drag wheel, concurrently b. moving said drag wheel through said pool of said polymer to viscously impede rotation of said drag wheel and generate a force to urge said wiping means against the entire internal circumference of said reactor, with each revolution of said wiping means.
Claim 14
Dependent Claim
138 words
In the process of removing volatiles from a polymer by evaporation by creating high polymer surface area with driven wheels in an essentially horizontal totally enclosed cylindrical wiped-wall polymer reactor having essentially horizontal polymer flow, said reactor having a pool of said polymer in its lower portion, the improvement comprising a. keeping the wall of said reactor wetted with a fresh film of polymer by driving a free-wheeling drag wheel by means of said driven wheels, said driven wheel having wiping means mounted thereon, said wiping means being actuated outward radially said drag wheel, concurrently b. moving said drag wheel through said pool of said polymer to viscously impede rotation of said drag wheel and generate a force to urge said wiping means against the entire internal circumference of said reactor, with each revolution of said wiping means.
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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) | 1979-08-24 | 1980-02-23 | 1980-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-24 | 1984-02-23 | 1984-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-24 | 1988-02-23 | 1988-08-24 | $7700.00 | Window Closed / Lapsed |