US3791044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Through drying for fibrous web
Assignee: Beloit Corp
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Filing: 1972-06-08
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Granted: 1974-02-12
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Expires: 1992-06-08
Abstract
Abstract A method and mechanism for the continuous drying of a traveling fibrous web such as a web of paper received from a paper making machine and containing water, including supporting the moving web on a porous screen in a drying zone and directing a flow of heated heat transfer liquid immiscible with the water through the web for evaporating the water and carrying water out with it through the web, separating the immiscible liquid from the water and recycling the immiscible liquid to again pass it through the web in the drying zone for a continuous cycle.
Inventors
- 👤 L Busker
- 👤 R Daane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:19
CPC Classifications
F; F26; F26B; F26B13/00; F26B13/10; F26B13/101; D; D21; D21F; D21F5/00; F26B5/00; F26B5/005
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
81 words
A mechanism for the continuous drying of a traveling fibrous web comprising, means supporting a moving web passing through a drying zone, means directing a flow of hot transfer fluid in a liquid phase through the web for evaporating the water in the web with the evaporating water passing out of the web with said fluid, and heating means for heating said fluid prior to passing through the web to a temperature in excess of the vaporization temperature of the water.
Claim 2
Dependent Claim
81 words
A mechanism for the continuous drying of a traveling fibrous web comprising, means supporting a moving web passing through a drying zone, means directing a flow of hot transfer fluid in a liquid phase through the web for evaporating the water in the web with the evaporating water passing out of the web with said fluid, and heating means for heating said fluid prior to passing through the web to a temperature in excess of the vaporization temperature of the water.
Claim 3
Dependent Claim
40 words
A mechanism for the continuous drying of a traveling fibrous web constructed in accordance with claim 1 wherein said heat transfer fluid is in part in the gaseous phase and in part in the liquid phase upon entering the web.
Claim 4
Dependent Claim
88 words
A meChanism for the continuous drying of a traveling fibrous web constructed in accordance with claim 2 and including first separating means receiving the fluid and water from the web and separating the liquid phase of the fluid for recycling through the drying zone of the web, and a second separator including condensing means for condensing the evaporated water in the liquid phase of the fluid with a separator for separating the water and liquid phase of the fluid for recycling through the drying zone of the web.
Claim 5
Dependent Claim
122 words
A mechanism for the continuous drying of a traveling fibrous web comprising, means supporting a moving web passing through a drying zone, means directing a flow of hot heat transfer fluid through the web for evaporating the water in the web with the evaporating water passing out of the web with said fluid. said fluid being at least in part in the gaseous phase, and heating means for heating said fluid prior to passing through the web to a temperature in excess of the vaporization temperature of the water, said heating and said flow directing means related so that the gas is condensed to the full liquid phase in passing through the web to yield its heat of vaporization through the water.
Claim 6
Dependent Claim
122 words
A mechanism for the continuous drying of a traveling fibrous web comprising, means supporting a moving web passing through a drying zone, means directing a flow of hot heat transfer fluid through the web for evaporating the water in the web with the evaporating water passing out of the web with said fluid. said fluid being at least in part in the gaseous phase, and heating means for heating said fluid prior to passing through the web to a temperature in excess of the vaporization temperature of the water, said heating and said flow directing means related so that the gas is condensed to the full liquid phase in passing through the web to yield its heat of vaporization through the water.
Claim 7
Dependent Claim
45 words
A mechanism for the continuous drying of a traveling fibrous web comprising, means supporting a moving web passing through a drying zone, and means directing a flow of a liquid immiscible with water through the web carrying a portion of the water from the web.
Claim 8
Dependent Claim
45 words
A mechanism for the continuous drying of a traveling fibrous web comprising, means supporting a moving web passing through a drying zone, and means directing a flow of a liquid immiscible with water through the web carrying a portion of the water from the web.
Claim 9
Dependent Claim
35 words
A mechanism for the continuous drying of a traveling fibrous web constructed in accordance with claim 5 and including means for separating said liquid from the water after it is passed out of the web.
Claim 10
Dependent Claim
38 words
A mechanism for the continuous drying of a traveling fibrous web constructed in accordance with claim 6 including means for recycling said separated immiscible liquid through the traveling web in said drying zone in a continuous recycled operation.
Claim 11
Dependent Claim
93 words
A mechanism for the continuous drying of a traveling fibrous web comprising, means supporting a moving web passing through a drying zone, means directing a flow of hot transfer fluid through the web for evaporating the water in the web with the evaporating water passing out of the web with said fluid, heating means for heating said fluid prior to passing through the web to a temperature in excess of the vaporization temperature of the water, and means for separating said fluid from the evaporated water after it is passed through the web.
Claim 12
Dependent Claim
93 words
A mechanism for the continuous drying of a traveling fibrous web comprising, means supporting a moving web passing through a drying zone, means directing a flow of hot transfer fluid through the web for evaporating the water in the web with the evaporating water passing out of the web with said fluid, heating means for heating said fluid prior to passing through the web to a temperature in excess of the vaporization temperature of the water, and means for separating said fluid from the evaporated water after it is passed through the web.
Claim 13
Dependent Claim
33 words
A mechanism for the continuous drying of a traveling fibrous web constructed in accordance with claim 8 including means for recycling the separated fluid back through the web in a continuous recycled operation.
Claim 14
Dependent Claim
82 words
A mechanism for the continuous drying of a traveling fibrous web comprising, means supporting a moving web passing through a drying zone, means directing a flow of hot transfer fluid in the form of tetrachloroethylene through the web for evaporating the water in the web with the evaporating water passing out of the web with said fluid, and heating means for heating said fluid prior to passing through the web to a temperature in excess of the vaporization temperature of the water.
Claim 15
Dependent Claim
82 words
A mechanism for the continuous drying of a traveling fibrous web comprising, means supporting a moving web passing through a drying zone, means directing a flow of hot transfer fluid in the form of tetrachloroethylene through the web for evaporating the water in the web with the evaporating water passing out of the web with said fluid, and heating means for heating said fluid prior to passing through the web to a temperature in excess of the vaporization temperature of the water.
Claim 16
Dependent Claim
82 words
A mechanism for the continuous drying of a traveling fibrous web comprising, means supporting a moving web passing through a drying zone, means directing a flow of hot transfer fluid in the form of Freon through the web for evaporating the water in the web with the evaporating water passing out of the web with said fluid, and heating means for heating said fluid prior to passing through the web to a temperature in excess of the vaporization temperature of the water.
Claim 17
Dependent Claim
82 words
A mechanism for the continuous drying of a traveling fibrous web comprising, means supporting a moving web passing through a drying zone, means directing a flow of hot transfer fluid in the form of Freon through the web for evaporating the water in the web with the evaporating water passing out of the web with said fluid, and heating means for heating said fluid prior to passing through the web to a temperature in excess of the vaporization temperature of the water.
Claim 18
Dependent Claim
112 words
A mechanism for the continuous drying of a traveling fibrous web comprising, means supporting a moving web passing through a drying zone, means directing a flow of hot transfer fluid through the web for evaporating the water in the web with the evaporating water passing out of the web with Said fluid, heating means for heating said fluid prior to passing through the web to a temperature in excess of the vaporization temperature of the water, and means defining a purging zone position subsequent to said fluid directing means with means for directing a flow of gas through the web in said purging zone to remove fluid therefrom remaining in the web.
Claim 19
Dependent Claim
112 words
A mechanism for the continuous drying of a traveling fibrous web comprising, means supporting a moving web passing through a drying zone, means directing a flow of hot transfer fluid through the web for evaporating the water in the web with the evaporating water passing out of the web with Said fluid, heating means for heating said fluid prior to passing through the web to a temperature in excess of the vaporization temperature of the water, and means defining a purging zone position subsequent to said fluid directing means with means for directing a flow of gas through the web in said purging zone to remove fluid therefrom remaining in the web.
Claim 20
Dependent Claim
29 words
A mechanism for the continuous drying of a traveling fibrous web constructed in accordance with claim 12 wherein superheated steam is directed through the web in said purging zone.
Claim 21
Independent Claim
125 words
The method of continuously drying a traveling fibrous web comprising the steps of supporting a moving web passing through a drying zone, directing a flow of heat transfer fluid through the web in said drying zone wherein said fluid is at least in part in the gaseous phase upon entering the web with the evaporating water passing out of the web with said fluid, and heating the fluid prior to passing through the web to a temperature in excess of the evaporation temperature of the water, said fluid being of a temperature and being passed through the web at a speed so that gas is condensed to the liquid phase in passing through the web giving up its heat of vaporization to evaporate the water.
Claim 22
Independent Claim
125 words
The method of continuously drying a traveling fibrous web comprising the steps of supporting a moving web passing through a drying zone, directing a flow of heat transfer fluid through the web in said drying zone wherein said fluid is at least in part in the gaseous phase upon entering the web with the evaporating water passing out of the web with said fluid, and heating the fluid prior to passing through the web to a temperature in excess of the evaporation temperature of the water, said fluid being of a temperature and being passed through the web at a speed so that gas is condensed to the liquid phase in passing through the web giving up its heat of vaporization to evaporate the water.
Claim 23
Independent Claim
57 words
The method of continuously drying a traveling fibrous web comprising the steps of supporting a moving web passing through a drying zone, directing a flow of liquid immiscible with water through the web forcing water from the web in said drying zone, and separating the immiscible fluid from the water after it has passed from the web.
Claim 24
Independent Claim
57 words
The method of continuously drying a traveling fibrous web comprising the steps of supporting a moving web passing through a drying zone, directing a flow of liquid immiscible with water through the web forcing water from the web in said drying zone, and separating the immiscible fluid from the water after it has passed from the web.
References Cited (Backward Citations)
US2889388A
Cited
US3408748A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |