US4580355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for distributing hot gas on a paper web
Assignee: Honeywell Measurex Corp
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Filing: 1984-05-23
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Granted: 1986-04-08
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Expires: 2004-05-23
Abstract
Abstract The specification discloses a steam distributor having a chamber to contain steam on one side of a paper web and a vacuum box on the opposite side of the paper web. The distributor has a feeding system for controlling the rate at which hot gas is applied to the paper.
Inventors
- 👤 Mat Boissevain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:26
CPC Classifications
D; D21; D21F; D21F7/00; D21F7/008; D21F7/003
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
193 words
A steam feeding system for distributing steam on a moving sheet of paper, the system comprising: (a) a steam hood located above the sheet; (b) a pipe to convey steam, coupled to the steam hood; (c) a tube coupled in fluid-flow communication with said pipe; (d) valve means coupled to said tube to control steam flowing from said pipe into said tube; and, (e) said valve means including a valve sleeve mounted in said tube, said valve being substantially cylindrical and having no piston ring located on said sleeve to contact said tube, said valve sleeve being spaced sufficiently apart from the interior of said tube to allow steam to flow between said valve sleeve and the interior of said tube when said valve sleeve is located in a maximum closed position, and said valve sleeve is movably mounted in said tube and is structured so that when said valve sleeve is located in a maximum open position said sleeve does not substantially restrict the flow of steam and when said sleeve is located in a maximum closed position said sleeve substantially restricts the flow of steam while allowing some flow of steam.
Claim 2
Dependent Claim
193 words
A steam feeding system for distributing steam on a moving sheet of paper, the system comprising: (a) a steam hood located above the sheet; (b) a pipe to convey steam, coupled to the steam hood; (c) a tube coupled in fluid-flow communication with said pipe; (d) valve means coupled to said tube to control steam flowing from said pipe into said tube; and, (e) said valve means including a valve sleeve mounted in said tube, said valve being substantially cylindrical and having no piston ring located on said sleeve to contact said tube, said valve sleeve being spaced sufficiently apart from the interior of said tube to allow steam to flow between said valve sleeve and the interior of said tube when said valve sleeve is located in a maximum closed position, and said valve sleeve is movably mounted in said tube and is structured so that when said valve sleeve is located in a maximum open position said sleeve does not substantially restrict the flow of steam and when said sleeve is located in a maximum closed position said sleeve substantially restricts the flow of steam while allowing some flow of steam.
Claim 3
Dependent Claim
18 words
A system according to claim 1 wherein said sleeve has substantially smooth, straight sides throughout its entire length.
Claim 4
Dependent Claim
40 words
A system according to claim 1 wherein said valve means further includes: (a) a plate member coupled to said sleeve; (b) a rod coupled to said plate member; and (c) bellows means coupled to said rod to move said sleeve.
Claim 5
Dependent Claim
46 words
A system according to claim 1 wherein said valve sleeve is located in an uppermost position when the valve sleeve is in the maximum closed position, and said valve sleeve is located in a lowermost position when said valve sleeve is in the maximum open position.
References Cited (Backward Citations)
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Cited
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Cited
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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) | 1989-04-07 | 1989-10-07 | 1990-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-07 | 1993-10-07 | 1994-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-07 | 1997-10-07 | 1998-04-08 | $7700.00 | Window Closed / Lapsed |