Patent US3576078A successfully refreshed from Google Patents.
US3576078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper drying process and apparatus
Assignee: NewPage Wisconsin System Inc
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Filing: 1970-02-02
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Granted: 1971-04-27
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Expires: 1990-02-02
Abstract
Abstract A process and apparatus for drying webs of newly formed paper material in the dryer section of a paper making machine having a plurality of rotatable dryer drums over which the paper web is guided in seriatim in heat exchange relationship while the web is disposed between open mesh dryer fabric endless belting and the web is scrubbed by air circulated through the meshes of the fabric while moving beneath hoods embracing the dryer drums.
Inventors
- 👤 Sherwood G Holt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:42
CPC Classifications
D; D21; D21F; D21F5/00; D21F5/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
16 words
The apparatus of claim 1 wherein each of said drying drums include an embracing dryer hood.
Claim 2
Dependent Claim
26 words
The apparatus of claim 1 wherein said dryer fabric belts are of varying permeability in the cross direction, the permeability being greatest adjacent its longitudinal center.
Claim 3
Dependent Claim
87 words
In a method for drying a paper web in the dryer section of a paper making machine comprising a plurality of horizontally disposed rotatable dryer drums arranged in upper and staggered lower series the steps which comprise moving the paper web between a pair of porous fabric belts alternately about said dryer drums, and simultaneously subjecting the paper web to air scrubbing action through the meshes of said porous fabric by impinging and flowing air thereover in a turbulent manner while being conveyed about said dryer drums.
References Cited (Backward Citations)
US1844658A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |