Patent US3791049A successfully refreshed from Google Patents.
US3791049A
Expired / Lapsed
US
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Drying methods with moisture profile control
Assignee: SMITHERM IND INC US
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Filing: 1971-10-04
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Granted: 1974-02-12
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Expires: 1991-10-04
Abstract
Abstract Methods of and apparatus for drying material in web, sheet, and similar forms by a combination of radiant and convective heating in which provision is made for controlling the moisture or other volatiles profile across the width of the material being dried.
Inventors
- 👤 H Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:24
CPC Classifications
F; F26; F26B; F26B23/00; F26B23/10; D; D21; D21F; D21F5/00; F26B13/00; F26B13/008; F26B13/10; F26B3/00; F26B3/28; F26B3/283
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
200 words
A method of drying materials of sheet, web, and similar forms comprising the steps of moving the material to be dried through at least one drying zone; directing radiant energy against the material as it is moved through said drying zone to evolve volatiles therefrom; directing a flow of heated fluid against the material as it moves through the drying zone to assist in evolving volatiles from the materials being dried and to scour evolved volatiles away from the surface of the material; and correcting the volatiles profile of the material being dried across the width of the material so that the volatiles content of the dried product will be substantially uniform across its width, the correction of the volatiles profile being effected by moving the material through a zone distinct from the aforesaid drying zone; directing radiant energy against the material as it moves through said distinct zone; directing a flow of heated fluid against said material as it moves through said distinct zone; and proportioning the intensity of the radiant energy and the volume of fluid directed against successive lateral regions of the material being dried to the volatiles content of the material in each of such regions.
Claim 2
Independent Claim
200 words
A method of drying materials of sheet, web, and similar forms comprising the steps of moving the material to be dried through at least one drying zone; directing radiant energy against the material as it is moved through said drying zone to evolve volatiles therefrom; directing a flow of heated fluid against the material as it moves through the drying zone to assist in evolving volatiles from the materials being dried and to scour evolved volatiles away from the surface of the material; and correcting the volatiles profile of the material being dried across the width of the material so that the volatiles content of the dried product will be substantially uniform across its width, the correction of the volatiles profile being effected by moving the material through a zone distinct from the aforesaid drying zone; directing radiant energy against the material as it moves through said distinct zone; directing a flow of heated fluid against said material as it moves through said distinct zone; and proportioning the intensity of the radiant energy and the volume of fluid directed against successive lateral regions of the material being dried to the volatiles content of the material in each of such regions.
Claim 3
Independent Claim
193 words
A method of drying materials of sheet, web, and similar forms comprising the steps of moving the material to be dried through at least one drying zone; directing radiant energy against the material as it is moved through said drying zone to evolve volatiles therefrom; directing a flow of heated fluid against the material as it moves through the drying zone to assist in evolving volatiles from the material being dried and to scour evolved volatiles away from the surface of the material; and correcting the volatiles profile of the material being dried across the width of the material so that the volatiles content of the dried product will be substantially uniform across its width, the correction of the volatiles profile being effected by moving the material through a zone distinct from the aforesaid drying zone; directing radiant energy against the material as it moves through said distinct zone; directing a flow of heated fluid against said material as it moves through said distinct zone; and proportioning the volume of fluid directed against successive lateral regions of the material being dried to the volatiles content of the material in each of such regions.
Claim 4
Independent Claim
193 words
A method of drying materials of sheet, web, and similar forms comprising the steps of moving the material to be dried through at least one drying zone; directing radiant energy against the material as it is moved through said drying zone to evolve volatiles therefrom; directing a flow of heated fluid against the material as it moves through the drying zone to assist in evolving volatiles from the material being dried and to scour evolved volatiles away from the surface of the material; and correcting the volatiles profile of the material being dried across the width of the material so that the volatiles content of the dried product will be substantially uniform across its width, the correction of the volatiles profile being effected by moving the material through a zone distinct from the aforesaid drying zone; directing radiant energy against the material as it moves through said distinct zone; directing a flow of heated fluid against said material as it moves through said distinct zone; and proportioning the volume of fluid directed against successive lateral regions of the material being dried to the volatiles content of the material in each of such regions.
Claim 5
Dependent Claim
37 words
The method of claim 2, wherein, in the volatiles profile correcting step, the heated fluid is directed against an area of the material which is substantially coincident with the area against which the radiant energy is directed.
Claim 6
Independent Claim
195 words
A method of drying materials of sheet, web, and similar forms comprising the steps of moving the material to be dried through at least one drying zone; directing radiant energy against the material as it is moved through said drying zone to evolve volatiles therefrom; directing a flow of heated fluid against the material as it moves through the drying zone to assist in evolving volatiles from the material being dried and to scour evolved volatiles away from the surface of the material; and correcting the volatiles profile of the material being dried across the width of the material so that the volatiles content of the dried product will be substantially uniform across its width, the correction of the volatiles profile being effected by moving the material through a zone distinct from the aforesaid drying zone; directing radiant energy against the material as it moves through said distinct zone; directing a flow of heated fluid against said material as it moves through said distinct zone; and proportioning the intEnsity of the radiant energy directed against successive lateral regions of the material being dried to the volatiles content of the material in each of such regions.
Claim 7
Independent Claim
195 words
A method of drying materials of sheet, web, and similar forms comprising the steps of moving the material to be dried through at least one drying zone; directing radiant energy against the material as it is moved through said drying zone to evolve volatiles therefrom; directing a flow of heated fluid against the material as it moves through the drying zone to assist in evolving volatiles from the material being dried and to scour evolved volatiles away from the surface of the material; and correcting the volatiles profile of the material being dried across the width of the material so that the volatiles content of the dried product will be substantially uniform across its width, the correction of the volatiles profile being effected by moving the material through a zone distinct from the aforesaid drying zone; directing radiant energy against the material as it moves through said distinct zone; directing a flow of heated fluid against said material as it moves through said distinct zone; and proportioning the intEnsity of the radiant energy directed against successive lateral regions of the material being dried to the volatiles content of the material in each of such regions.
Claim 8
Dependent Claim
37 words
The method of claim 4, wherein, in the volatiles profile correcting step, the heated fluid is directed against an area of the material which is substantially coincident with the area against which the radiant energy is directed.
Claim 9
Independent Claim
203 words
A method of drying materials of sheet, web, and similar forms comprising the steps of moving the material to be dried through at least one drying zone; directing radiant energy against the material as it is moved through said drying zone to evolve volatiles therefrom; directing a flow of heated fluid in impinging relationship against the material as it moves through the drying zone over an area generally coincident with that against which the radiant energy is directed to assist in evolving volatiles from the material being dried and to scour evolved volatiles away from the surface of the material; and correcting the volatiles profile of the material being dried across the width of the material in a zone distinct from the drying zone so that the volatiles content of the dried product will be substantially uniform across its width, the volatiles profile of the material being dried being corrected by directing radiant energy and a flow of heated fluid against said material in said distinct zone and by proportioning the intensity of the radiant energy and the volume of fluid directed against successive lateral regions of the material being dried to the volatiles content of the material in each of such regions.
Claim 10
Independent Claim
203 words
A method of drying materials of sheet, web, and similar forms comprising the steps of moving the material to be dried through at least one drying zone; directing radiant energy against the material as it is moved through said drying zone to evolve volatiles therefrom; directing a flow of heated fluid in impinging relationship against the material as it moves through the drying zone over an area generally coincident with that against which the radiant energy is directed to assist in evolving volatiles from the material being dried and to scour evolved volatiles away from the surface of the material; and correcting the volatiles profile of the material being dried across the width of the material in a zone distinct from the drying zone so that the volatiles content of the dried product will be substantially uniform across its width, the volatiles profile of the material being dried being corrected by directing radiant energy and a flow of heated fluid against said material in said distinct zone and by proportioning the intensity of the radiant energy and the volume of fluid directed against successive lateral regions of the material being dried to the volatiles content of the material in each of such regions.
Claim 11
Independent Claim
251 words
A method of drying materials of sheet, web, and similar forms comprising the steps of correcting the volatiles profile of the material being dried across the width of the material in a first zone so that the volatiles content across its width will be substantially unform; thereafter moving the material to be dried through at least one drying zone distinct from said first zone; directing radiant energy against the material as it is moved through said drying zone to evolve volatiles therefrom; directing a flow of heated fluid against the material as it moves through the drying zone to assist in evolving volatiles from the material being dried and to scour evolved volatiles away from the surface of the material; and subsequently again correcting the volatiles profile of the material as aforesaid in a second zone distinct from said first zone and said drying zone to minimize variations in the volatiles content of the material across its width, the volatiles profile of the material being dried being corrected in said volatiles profile correcting steps by directing radiant energy against the material being dried as it moves through each of said first and second zones; directing a flow of heated fluid against said material as it moves through said first and second zones; and, in each of said first and second zones, proportioning the intensity of the radiant energy directed against successive lateral regions of the material being dried to the volatiles content of the material in each of said lateral regions.
Claim 12
Independent Claim
251 words
A method of drying materials of sheet, web, and similar forms comprising the steps of correcting the volatiles profile of the material being dried across the width of the material in a first zone so that the volatiles content across its width will be substantially unform; thereafter moving the material to be dried through at least one drying zone distinct from said first zone; directing radiant energy against the material as it is moved through said drying zone to evolve volatiles therefrom; directing a flow of heated fluid against the material as it moves through the drying zone to assist in evolving volatiles from the material being dried and to scour evolved volatiles away from the surface of the material; and subsequently again correcting the volatiles profile of the material as aforesaid in a second zone distinct from said first zone and said drying zone to minimize variations in the volatiles content of the material across its width, the volatiles profile of the material being dried being corrected in said volatiles profile correcting steps by directing radiant energy against the material being dried as it moves through each of said first and second zones; directing a flow of heated fluid against said material as it moves through said first and second zones; and, in each of said first and second zones, proportioning the intensity of the radiant energy directed against successive lateral regions of the material being dried to the volatiles content of the material in each of said lateral regions.
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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) | 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 |