US3661702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stock flow system for paper-making machine
Assignee: TI Gotham Inc
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Filing: 1969-12-15
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Granted: 1972-05-09
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Expires: 1989-12-15
Abstract
Abstract In order to establish diffusion among a plurality of fluid streams emanating respectively from a plurality of conduits in parallel, closely-spaced-apart relation, the streams are combined within a single enclosure to form a single stream of substantial width compared to its thickness. The enclosure is formed with a double elbow so that the direction of movement of the stream is changed twice in succession, through an angle of substantially 90* in each case. The enclosure is formed in the vicinity of each elbow in such a manner as to cause acceleration of the stock during each change in its direction of movement and deceleration of the stock immediately preceding each change in its direction of movement.
Inventors
- 👤 John A Means
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:38
CPC Classifications
D; D21; D21F; D21F1/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
14 words
A method according to claim 1 wherein each of said angles is substantially 90*.
Claim 2
Dependent Claim
43 words
A method according to claim 1 wherein the direction of movement of said single stream immediately after the second of said changes therein is substantially parallel to the direction of movement of said single stream immediately before the first of said changes therein.
Claim 3
Dependent Claim
43 words
A method according to claim 1 wherein the direction of movement of said single stream immediately after the second of said changes therein is substantially opposite to the direction of movement of said single stream immediately before the first of said changes therein.
Claim 4
Dependent Claim
41 words
A method according to claim 1 wherein the ratio of the speed of said stock immediately after the earlier of said two decelerations to the speed of said stock immediately before the earlier of said two decelerations is substantially 1/3 .
Claim 5
Dependent Claim
60 words
A method according to claim 1 wherein the throughput of said single stream is within the range of 30 to 60 gallons per minute per inch of width of said single stream, and further comprising the step of forming a paper web from said single stream, said web having a width substantially equal to the width of said single stream.
Claim 6
Dependent Claim
146 words
Apparatus for establishing diffusion among a plurality of parallel stReams of paper stock employed in the manufacture of a paper web, comprising an unobstructed flow channel into which said streams discharge, said channel having a width substantially equal to the width of said paper web and defining a first elbow wherein stock flow direction changes through a first angle of substantially 90* and a second elbow downstream of said first elbow wherein stock flow direction changes through a second angle of substantially 90*, there being an accelerating portion throughout each of said elbows comprising converging opposite walls and wherein the cross-sectional flow area of said stock diminishes in the direction of stock flow and a decelerating portion immediately adjacent to and upstream of each accelerating portion comprising diverging opposite walls and wherein the cross-sectional flow area of said stock increased in the direction of stock flow.
Claim 7
Dependent Claim
76 words
Apparatus according to claim 7 wherein the ratio of the cross-sectional flow area of said stock immediately upstream of said first elbow to the cross-sectional flow area of said stock immediately downstream of said first elbow is substantially 12/7, and the ratio of the cross-sectional flow area of said stock immediately upstream of said second elbow to the cross-sectional flow area of said stock immediately downstream of said second elbow is comparable to said first-named ratio.
Claim 8
Dependent Claim
41 words
Apparatus according to claim 7 wherein said flow channel is formed with opposite walls diverging from each other with reference to the direction of stock flow therebetween by an included angle between 0* and 6* immediately upstream of said first elbow.
Claim 9
Dependent Claim
38 words
Apparatus according to claim 7 wherein said flow channel is formed with opposite walls diverging from each other with reference to the direction of stock flow therebetween by an included angle between 0* and 6* between said elbows.
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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |