US4257167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for supporting a web, especially a paper web
Assignee: Siemens AG
•
Filing: 1979-09-19
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Granted: 1981-03-24
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Expires: 1999-09-19
Abstract
Abstract Support of a paper web in a high-frequency drier is disclosed. The web is supported by flowing gases without contacting and at a defined distance from the stray field electrodes. The blowing or gas directing devices for the hot gases are provided in the form of nozzle chests which are disposed in or at the stray field electrodes.
Inventors
- 👤 Hans-Christian Grassman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:02
CPC Classifications
D; D21; D21F; D21F5/00; D21F5/16; D21F5/165; F; F26; F26B; F26B13/00; F26B13/10; F26B13/101; F26B13/104; F26B3/00; F26B3/32; F26B3/34; F26B3/343
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
81 words
High frequency drying apparatus for drying and supporting a web, especially a paper web, comprising stray field electrodes adapted to be coupled to a high frequency source and which include electrically conductive nozzle chests for directing gases at the web to support the web at a predetermined distance from the stray field electrodes without contacting the stray field electrodes, said nozzle chests constituting part of the stray field electrodes and thereby also adapted to be coupled to the high frequency source.
Claim 2
Dependent Claim
81 words
High frequency drying apparatus for drying and supporting a web, especially a paper web, comprising stray field electrodes adapted to be coupled to a high frequency source and which include electrically conductive nozzle chests for directing gases at the web to support the web at a predetermined distance from the stray field electrodes without contacting the stray field electrodes, said nozzle chests constituting part of the stray field electrodes and thereby also adapted to be coupled to the high frequency source.
Claim 3
Dependent Claim
40 words
The apparatus according to claim 1, in which a rod-shaped electrode is secured to each of opposed ends of the stray field electrodes, said stray field electrode ends being referenced with respect to the path of travel of the web.
Claim 4
Dependent Claim
35 words
The apparatus according to claim 1, in which stray field electrodes including nozzle chests for directing gas are alternatingly disposed with additional stray field electrodes with respect to the direction of movement of the web.
Claim 5
Dependent Claim
26 words
Apparatus according to claim 3, in which stray field electrodes having nozzle chests and the additional electrodes are disposed on opposed sides of the paper web.
Claim 6
Dependent Claim
18 words
Apparatus according to claims, 3 or 4, in which the nozzle chests are operative to direct hot gases.
References Cited (Backward Citations)
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US3722105A
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US3740257A
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US3952421A
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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) | 1984-03-23 | 1984-09-22 | 1985-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-23 | 1988-09-22 | 1989-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-23 | 1992-09-22 | 1993-03-24 | $7700.00 | Window Closed / Lapsed |